HomeMy WebLinkAboutORD 2185I 4 .• ' t1RIGINAL � � - � �
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. ORDINANCE N0. 2185
� AN ORDINANCE OF THE CITY OF RENTON, WASHINGTON ADOPTING AND � '
ESTABLISHING A "SAFETY CODE FOR MECHANICAL REFRIGERATION11, � •
1964 EDITION, REGULATING THE INSTALLATION, CONSTRUCTION,
ALTERATION AND R�PAIR OF REFRIGERATION PRODUCING AND SIMILAR
EQUIPMENT; PROVIDING FOR ADDITIONAL PROVISIONS TO SAID CODE
INCLUDING FEE SCHEDUL� ; PROVIDING FOR THE ADMINISTRATION
AND ENFORCEMENT THEREOF; PROVIDING PENALTIES FOR VIOLATIONS
AND REPEALING CONFLICTING ORDINANCES AND PROVISIONS.
WHEREAS not less than three (3) printed copies in book form of the "SAFETY CODE
FOR MECHANICAL REFREIGERATION", 1964 Edition, as sponsored by the American Society of
Heating, Refrigerating and Air Conditioning Engineers, have heretofore been filed in the
office of the City Clerk of the City of Renton for use and examination by the public, and
it being advisable and in the public interest to adopt same by reference, together with
certain additional provisions and amendments as hereinafter set forth, NOW THEREFORE
�E IT ORDAINED BY THE MAYOR AND THE CITY COUNCIL OF THE CITY OF RENTON AS
FOLLOWS:
SECTION I: That certain "SAFETY CODE FOR MECHANICAL REFRIGERATION", 1964 Edition
as sponsored by the 'tAmerican Society of Heating, Refrigerating and Air Conditioning
Engineers", of which not less than three (3) printed copies in book form have heretofore
been filed in the office of the City Clerk of the City of Renton, ia hereby adopted and
established as the City of Rentonts Mechanical Refrigeration Code; any and all
amendments thereof and additions thereto when printed and filed with the City Clerk by
authorization of the City Council shall be considered, accepted and constituted a part
of such code without the necessity of further adoption of such amendments or additions
by the legislative authority of the City or by ordinance.
SECTION II: In addition to the aforesaid Code the following amendments thereto
are hereby adopted, to-wit:
l. Definitions: Words and phrases used herein shall have the following meanings:
A. "Air-Conditioning Contractor't means a person who engages in the
business of installation, alteration, or repairing of refrigeration
equipment as defined in Sections 2.52, 2.52.1, 2.52.2, 2.52.3
and 2.52.4 of the above captioned code.
B. t'Jorneyman Refrigeration Mechanic'' means a person engaged in the
installation, repair or servicing as an artisan, of any refrigeration
system, equipment or parts thereof.
C. "Refrigeration Service Shop Mechanic" means a person engaged in
the installation, repair and servicing, as an artisan, of any
refrigeration system or machine having a standard rating of less
than one-fourth horsepower or one-fourth ton refrigeration effect
and containing less than six (6) pe�unds of refrigerants, and of
approved self-contained systems of one (1) horsepower and less.
D. "Refrigeration Operating EngineerT' means a full-time employee
who spends a substantial portion of his time in the maintenance
and operation of a refrigeration system in a building, or portion
thereof, used for manufacturing, processing, or storage of
materials or products, including among others, chemicals, food,
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� candy, and ice crea� factories, ice �aking plants, caeat `
� ' pa�king plants, refineries, perishable foad w�rehouses,
� hotels, hospitals, restaurants, and sic�ilar occupanc�ies
anc� equippecl with a refrigeration syste�, and whose duty
shall be to operate, maintain, �nd keep in � safe €and
serviceable candition alI a� his ecap3oyers' re€rigeratian
syste�e and equipctent.
E, "Refrigerati.on Service Shop" r�eans a person et�gaged in the -�
business of rendering ref rigeration ser vice on ref rigert�tion
systens or caachi.nes having a star►dard rating af less th.an one-
fotzrth horsepawer or one-fourth ton refrigeration effect and
cantaining l.ess than six C6) pounds af refrigerants �nd on
approved self--contained syster�s of one C2� horsepawer and less. .-.
F. „Recagni.zed School a� Teehnalogy" c�e�ns ozte wttieh is accredited
by nation�2 or regional accrediting association.
G. "Refrigeration Spster�+" is a ca�abination a� inter-connected
re£rigerant--containing parts con�i.tuting one closed refrigerant
circuit in which a refriger�nt is circulated for the purpose
of extraeting heat and shall a.nelude nat only the direct syste�
bnt aI so the "indirect systect" as def ined in the �caerican
Standard Sa�'ety Code, A,S.A.,B9,3 i964. for'Mech�ni.et�2� Refri�ratiat,on
f ile with the City Clerk of the City of Renton,
H. A Journeyr�an Ref rigeration Nechanic, in order to qualif p as such,
�aust have at least three C3) years actual €u11�tiM� experience
as a Joarney�n Refrigeration Mechanic or Ref�rigerati,on Ser�ice
Shop I�chanic or Ittdustrial Ref rigeration Engineer or its equiv-
alent; or (2) two C2) yemrs' traini.ng in a recognized school of
teehna3.ogYe Plus two yearst fu33.-tic�e actual experience at
�.he trade; or (3) graduation f rom a recognized schaol of
technologY Plus nne years' actuaZ eacgsrience �t the tr&de.
2, It shall be unlawful to install, alter or repair any refrigeration syste�
or equipcaent, except as hereinafter provided, without � valid pemait iseued by the City�
provideci, however, that in cases of emergency sueh wark �ay be undertak�n witht�ut such
percnit, but application therefor shall in all cases be caade to the Building Director of
the City of Renton within twenty-four (24) hours or within one C17 working day froca
the tine when the in.stallatian, alteration or repair is starting; PR4t�iDED, FipWEVEft,
that no perrait ar fee shall be req uirad f�r approved self-contained ref rigerators or
f reezers in � single �ar�ily dwelZing or unit used f ar the purgase of storing or preserving
food fon c�xie ttse.
3„ No per[nit shall be required to do �aintenance work or r�alce n%nor repairs
to refriger�tion systens or eqtzip�tent, such as chan�ing belts, oiling c�ators, c2ea�a.ng
condensers, ehanging �.otars and sz�ilar work, but no such �inor regair wark sha�l be
done on the refrigerant-cont�ining portion of the systera or �q�tipc�ent except by a licensed
Refrigeration Mechanic or � registered Refrigeratzon Mechanic �pprentice under his direct
supervisian, or by a licensed Service Shop Mechanic ar a registered Service Shop Apprentice
under his direct supervision, or by a licensec� Tndustria2 Re�rigeration Enginser or a
re�;i�tered Industrial Ref rigeration Engineer A pprentice under his d irect supervision, ar by
a li.ctensed Refrig�ration Operating Engineer or a registered Refrigeratian dperating Engin- I
e�r Apprentice under his direet supervison; said Engineer and Engineer Apprentice shail
be ragularly ec�ployed by the owner or operatar af the buil.dang.
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4. Pernit Fees: Applications for perc�its for installations sha1T be aade to the
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Building Director of the City of Renton and shall be accompanied by the required fee as
followa:
EACH CONIPRESSOR EACH ABSORPTION UNIT
Up to 3/4 HP incl, or up to 1/2 T Refrig. Effect $2.50
1 to 22 HP incl. or i/2 to 1.6 T Refrig. Effect 4.00
3 to 5 HP incl. or 1.7 �0 3.3 T Refrig.. Effect b.00
6 to 10 HP incl. or 3.4 to 6..6 T Ref rig. Effect 10.00
11 to 25 HP incl. or 6.7 to lb_.6 T Refrig. Effect 15.00
25 to 40 HP incl. or 16.7 to 27,07 T Refrig. Effect 20.00
40 HP and over or 27.8 T Refrigeration Effect
and over 25..00
For Multiple Evaporator Systens
Each additional Evaporator 1.00
For additions or replacenents to existing refrigeration systeas
Each evaporator, absorber, or condenser.
Up to 1/2 T Refrig. Effect �2.50
1/2 to 1.6 T Ref rig. Effect 4.00
1.7 to 3.3 T Refrig. Effect 6.00
3,4 to 6.6 T Refrig. Effect 10.00
6,7 to 16.6 T Refrig. Effect 15.00
16,7 to 27,7 T Ref rig, Effect 20.00
27.8 T Ref rig, Effect and Over 25.00
For A 1 te r ing and Re pa ir ing
Esti�►ated Cost based on co�►plete cost of all r�aterials, and labor:
$ 500 or less $2.50
$ 501 to $1000 4.00
$lOd1 to $1500 6.00
$1501 to $2000 10.00
$2001 to $25d0 15.00
$2541 to $3000 20.00 '
�3001 to $3500 25.00
$3501 and over 30.00
5. Except�on to Li.cense and Perclit Provisions. No iicense or pemit shall be
required for the installation, alteration or repair of an indirect refrigeration systea
as defined in Section 4.3 of the AMerican Standard Safety Code for Mechanical Refriger-
ation; bt�t all such installations and repairs shall be �ade in confornity with the
provisions of this Ordinance and the Director sh�Il �ake such inspections as deeaed
necessary.
6. No one shall perforr� any of the services or activities covered by this Ordinance
� without a license as here in required, except that anyone who has e ngaged in the business
as an A ir Cond it ioning Contractor f or thirty (30) days or r�ore incted ia te ly preced ing the
passage of this Ord inanee �ay continue to engage in such services or activities without a
license until his application for a license is rejected by the �ity� because of fail.ure
to t�ake or pass the exaaiinations herein required; and no one person shall continue to
engage in such services or activities without such license unless an app2ication for
such license and exa�►ination is filed with the City Clerk within thirty (30) days after
this Ordinance takes effect.
7, No separate 1 icense shal l be required for any Journeyrsan or Refrigeration Nkchanic
or Ref rigeration Service Shop Mechanic if such a party has a valid iicense i�sued by the
State of Washington, the City of Seattle, or any other city in Kis�g County which has
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heretofore or shall herea€ter adopt the aforesaid code; in all other cases anydther
app3icant for such license shall subnit in writing to the Building Director �of the Ci�y
of Renton the require�ents set forth in Para�raph 1 (H) and pass suc,h other examination,
written or oral, as are pertinent and relevant to Mechanical Refrigeration work. i
8. Any license issued pursuant to this Ordinance �►ay be revoked by the City I!
Council upon reconQendation of the Building Director for inco�petence, negligence, �nis- '�
representation, giving fraudulent inforaation in making application for a license or
pernit, failure to comply with the requirements of this Ordinance or upon cancellation I
or revocation of the bond required herein. Before any bond is cancelled the surety
thereon shall give the City Clerk and the Building Director thirty (30) days'.writt�n I
notice of his intention so to do. Upon cancellation of the bond the license shall be I
suspended; provided, however, if a new bond of the same tenor and effect is supplied, '
the license shall continue effective. In the event of cancellation of any license by
the City Council, the Iicensee shall have the right to appeal to the Superior Court,
King County, tJashington, within ten (10) days from the date of any such decision.
9. No refrigeration installation, a2teration, or repair work shall be hidden
from view ih any manner nor sha21 any pipe ir►stallation or outlet boxes or parts thereo�
be concealed or covered until the same has been inspected and approved by the Building
Director. The Building Director is charged with the enforcement of this Ordinance and
shall have jurisdiction to determine whafi is approved or acceptable to the authorities
having jurisdiction as provided in A.S.A. B9.1-1964.. Whenever any installation, alter�
ation, or repair woric is ready for inspection, the Bailding Director shall be notified
in writing and he shall make inspecti:on thereof within three C3) days af ter such
written notification is received except as provided hereafter regarding pressure tests.
If any installation, alteration or repair work has been done in such manner as to conceal
th� same bef ore it has been inspected and approved by the Building Director, the Building
� Director ma y remove or cause to be removed the obstruction so that suc�h work �ay be ,
proper2y inspected. Whenever any installation, alteration or repair wo�k has been �oa�-
pleted and approved by the Building Director the permit shall shaw such inspection and
approval and shall be posted in a conspicuous place in the proximity of the compressor
or absorber. The Building Director shall be notif ied at least f our (4) hours prior to
a pressure test or when self-contained or unit systems are set in place. In case of
emergency work the Building Director shall be notified on the next regular business day
that the test was applied prior to operation of the system.
10. The installation, alteration, repair, ma intenance and operation of refrig--
eration systems and plants and all ap�urte nances thereto shall be in accordance with the
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, code provisions hereinabove adopted.
11. The City of Renton and its officers or employees engage.d in cperforming
any acts or duties under this Ordinance shall not be liable for any damage or injury
due to or occasioned by the operation or c�aintenance of any refrigeration systems or
appurtenances, whether or not the same has been licensed, permits issued by or inspection
and approv�I given such system, or appurtenances by said City or its off icers or employees.
12. Violation of or failu�e to comply with any of the provisions of this
Ordinance shall, upon conviction thereof, be punishable by a f ine of not more than Five
Hundred Dol2ars ($500.00) or by imprisonment in the City Jail not to exceed nine�y{90)
days, or by both such f ine and imprisonment.
13. All licenses issued hereunder shall be issued f or an annual pe riod based
on the caZendar year and sha21 expire, in any event, on the last day of December of each
year. Whenever a license is issued which will expire in less than six (6) months froca
the date of issuance, the fee shall be one--half (1/2) the annual fee. Such 1 icense may
a nd
be renewed annually upon payment of the annual fee. The annua3 license/exac�ination fee,
payable in advance, shall be as follows: The sum of ten dollars, ($10.00) .
No license shall be issued until the applicant shall have filed with the City Clerk a
surety company bond in the su� of One Thousand Dollarr, !,�? ,000.00) executed by the
applicant as principal and a surety campany authorized to do business in the State of
Washington as surety, said bond to be approved as to forc� by the City Attorney. S�id
bond shali be conditioned for the faithful performance of any contract made for the
contractor or shop, covering installation, alteration or repair of the ref rigeration
system or equipment and that the principal wiZl comply with a12 the provisions of this
or d ina nce.
SEC TION III: All other ordinances or parts of ordinances in conflict herewith
are hereby repealed.
SECTION IV: This ordinanee ahall be in full force and effect, from and after
its passage, approval and legal publication. � - � ` ,
PASSEA BY THE CIZY COUA'CIL this,. ��t„j� day of�c.�obe� lg�s• ` � � "` _y
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Helmie Nelson, City C2erk .
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APPROVED BY THE MAYOR this �.th day � Oc�to'�er� 1965,
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Donald W. Custer, Mayor
Approved as to f orm:
�'�rur.0 .�i,. S' �� � �ity � 1IT!3LI�1'.T1G%�? D��.Ti,¢ Cctober 6� 1;65
. :e :.s:� �..ttcrneY .,5_
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Rey. U.S. Pat. O$.
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ASA 69.1-1964
� ' � ASHRAE Standard 15-6d
UDC 621.56: 614.8
� � � .A ar�ericart �tandcard �
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SPONSOR—The American Society of Heating, Refrigerating and Air Conditioning En�ineers
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Approved by The American Society of Heatin�, Refri�erating end Air Conditioning En�ineers, June 26, 1963 "
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� Approved by American Standards Association, December 2, 1964 �
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ANIEFPBe�iPf SOCiETY OF H�AYI��, REFRIGER�lTIMG AiND AIR-COWDITIOMIMG EMGINEERS, INC.
UNITED E�GIEVEERiNG CEP�ITER, 345 EASY 47 STREET NEW YORK, N. Y. 10017 ,
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COPYRIGHT 1964 �
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' ' ' American Standards Associatio� Sectio�al Committee B9—1964
, • Personnel who Revised this Code followr.
American Society of Heating Refrigerating �
and Air-Conditioning E?ngineers . . . . . . . . . . . . . . . . . . J. R. Chamberiain,Frank Drogosch, �
• �A. I. McFarlan, R. L. Wiiliams ''
W.W.Grear, A.J.Hess, William W. Higham Altemates
Air-Conditioning& Refrigeration Contractors of America . . . . . . . . . . . . . . . . . . . Nathan R. Feldman
� Theodore A. Reina . . . . . . . Alternate
Air-Conditioning and Refrigeration Institute . . . . . . . . . . . . . . . . M. W. Garland, R. A. Gray, Jr. '
F. J. Reed . . . . . . . . . . . . . . . . . . . . . . . . Alternate
American Gas Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Harold S. Bi.rkett
American Institute of Chemical Engineers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W. A. Pennington
American Society of Mechanical Engineers. . . . . . . . . . ... . . . . . . . . . . . . . . . . . Carl F. Kayan
' Americap Society of Safety Engineers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Association of Casualty and Surety Companies . . . . . . . . . . . . . . . . . . . . . . . . . . John W. Strassberger
Building Officials Conference of America . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paul E. Baseler
John J. Ealint . . . . . . . . . . Altern`ate
Bureau of Explosives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. A. Anderson
Compressed Gas Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F. R. Fetherston
Copper Development Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur I. Heim I
Charles H. Ellwanger. . . . . . Altemate ,
, General Services Administration—Public Buildings Service . . . . . . . . . . . . . . . . John C. Strusch
Institute of Electrical and Ele�ctronic Engineers, Inc. . . . . . . . . . . . . . . . . . . . . . Frank Hausfeld I
�rnational Association of Governmental Labor Officials . . . . . . . . . . . . . . . . F. W. Marcaccio �1...,.,,' I
Michael P. Riccitelli . . . . . Alternate
International Association of Machinists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Henry E. Kaltun '
Manufacturers Standardization Society of the Valve and Fittings Industry . . . . . . . . . W. P. Kliment
• � Scott R. Dickinson . . . . . . . Alternate
Manufacturing Chemists' Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . R. L. Williams
Meckianical Contractors AssociaYion of America . . . . . . . . . . . . . . . . . . . . . . . . . Albert Giannini, E. J. Berlet
A. F. Nass . . . . . . . . . . . . Altemate
National Association uf Mutual Casualty Companies . . . . . . . . . . . . . . . . . . . . . .
Herbert T. Walworth . . . . . . Altemate '
National Association of Refrigerated Warehouses . . . . . . . . . . . . . . . . . . . . . . . . R. M. Powell
National Bureau of Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Paul R. Achenbach
' National Electrical Manufacturers Association . . . . . . . . . . . . . . . . . . . . . . . . . . B. S. Booher, O. D. Martin
G. S. Hill, M. Kalischer . . . . Alternates
� National Ice Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . William T. Jobe
, Nationel Safety Council . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Howard Rebholz
, A. M. Baltzer . . . . . . . . . . Alternate
S New York Board of Fire Underwriters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W. Robert Powers
Refri�eration Service Engineers Society . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L. J. Wallace
Underwriters' Laboratories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G. H. Pope, E. J. Huber, Sr.
lted Association of Journeymen&Apprentices of the
• Plumbing and Pipe Fitting Industry . . . . . . . . . . . . . . . . . . . . . . . . . . Leslie E. Dilg �
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2 ASA 8+9.1 1964
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' CONTENTS
$ection 1 - $cope and Purpose $ection 10 - Design ond Construction of Eq�ipment
�� � 1.1 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 10.1 General . . . . . . . . . . . . . . . . . . . . . . . . 10
1.2 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 14.2 Minimum Test Pressures . . . . . .'. . . . . . . . . 10
1.3 Application . . . . . . . . . . . . . . . . . . . . . . . . . 4 10�.3 Equipmen� . . . . . . . . . . . . . . . . . . . . . . . . 10
I • 10.4 Pressure-Limiting Devices. . . . . . . . . . .^. . . 10
$ection 2 - Definitions . . . . . . . . . . . . . . . . : . . . 4 10.5 Liquid Level Gage Glasses . . . . . . . . . . . . . 11
10.6 Dial of a Pressure Gage. . . . . . . . . . . . . . . . 11 �
Section 3 - Occupancy Classification 10.7 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . il i
' 3.1 Locations Governed by this Code. . . . , , , , , 6 Section 11 - Refrigerant-Contoi�ing Pressure Vessels
3.2 Adjacent Locations. . . . . . . . . . . . . . . . . . . . 7 f
11.1 Exceeding 6 In. Inside Diameter . . . . . . . . . . 11 �
Sattion 4 - Refrigeration System Classification by Type 11.2 Not Exceeding 6 In. Inside Diameter. . . . . . . . 12 �
11.3 Relief Devices. . . . . . . . . . . . . . . . . . . . . . 12
11.4 Standard H drostatic Tests. . . . . . . . . . . . . . 12 h
4.1 Refrigerating Systems . . . . . . . . . . . . . . . . . . 7 y j
� 4.2 Direct System. . . . . . . . . . . . . . . . . . . . . . . . 7 �
4.3 Indirect System. . . Section 12 - Relief Devices In General �
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4.4 Secondary 12efrigerant System . . . . . . . . . . . . . 7 �
. 12.1 General . . . . . . . . . . . . . . . . . . . . . . . . . 12 i
Section 5 - Refrigerant Classification. . . . . . . . . . . . . 7 12.2 For Positive Displacement Compressors . . . . . 12 E
12.3 Discharge of Pressure-Relief Devices and Fusi- �
5eetion 6 - Requirements for Institutional, Public Assembly, ble Plugs . . . . . . . . . . . . . . . . . . . . . . . . . 12 �
12.4 Ammonia Discl�arge. . . . . . . . . . . . . . . . . . . 12 �
, Rasidential and Commercial Occupancies �
� 12.5 Sulphur Dioxide Discharge . . . . . . . . . . . . . . 12
6.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 �
6.2 Group I Refrigerants . . . . . . . . . . . . . . . . . . . � Saction 13 - Relief Devices for Pressure Vessels
6.3 Group 2 Refrigerants . . . . . . . . . . . . . .�. . . . . 8 t
6.4 Group 3 Refrigerants . . . . . . . , . . . ,. . . . . , g 13.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . 13 �
� � 1.3.2 Over 3 Cubic Feet . . . . . . . . . . . . . . . . . . . 13 �
� Seetion 7 - Requiremen,ts for Industrial Oecupancies 13.3 Internal Gross Vol. of 3 Cubic Feet or Less. . . 13 ;
"���� 1.3.4 Used as Part of Evaporator. . . . . . . . . . . . . . 13 !
�.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . g 13.5 Required Capacity . . . . . . . . . . . . . . . . . 13
7.2 Number of Persons . . . . . . . . . . . . . . . . . . . . 9
13.6 Pressure-Relief Device Setting. . . . . . . . . . . 13 '
, � 13.7 Rupture Member Setting. . . . . . . . . . . . . . . . 13
� Section 8 - Installation Requirements 13.8 Marking of Relief Devices . . . . . . . . . . . . . . 13 �
� 8.1 Foundations and Supports. . . . . . . . . . . . . . . . g Section 14 - Field Tests �
8.2 Moving Machinery. . . . . . . . . . . . . . . 9
� � � � � � 14.1 General 13 '
8.3 C1earSpace . . . . . . . . . . . . . . . . . . . . . . . . 9 . . . . . . . . . . . . . . . . . . . . . . . . . . �
14.2 Test Medium . 13
. . . . . . . . . . . . . . . . . . . . . .
8.4 Compressor or Condensing Units with Enclosures ' 9 14.3 Posting of Tests . . . .
8.5 Water Supply and Discharge Connections . . . . . . 9 • • • • • • • • • • • • • • • • 14 �
8.6 Illumination. . . . . . . . . . . . . . . . . . . . . . . . 9
Section 15 - Instructions �
' 8.7 Electrical Equipment and Wiring. . . . ... . . . . . . 9 .
8.8 Gas•Fuel Devices. . . . . . . . . . . . . . . . . . . . . 9 15.1 Signs. . . . . . . . . . . . . . . . . . . . . . . . . . 14 �
8.9 Open Flames . . . . . . . . . . . . . . . . . . . . . . . . 9 15.2 Metal Signs for Systems Containing Over 100 Lb E
8.10 Flammable Refrigerants . . . . . . . . _ . . . . . . 9 f
8.11 Machinery.Room Requirements. . . . . . . . . . . . . g of Refrigerant . . . . . . . . . . . . . . . . . . . . . . 1-4 i
8.12 Air Duct Systems . . . . . 15.3 New Sign for Changed Refrigerant . . . . . . . . . 14 f
' ' ' ' ' ' ' ' ' ' ' ' � ' � � 10 15..4 Charging and ISischarging Refrigerants . . . . . . 14 i
15.5 Refrigerants Withdrawn from Refrigerating
Section 9 - Rofrigerant Piping,Valves, Fittings, and Related f
Parts Systems. . . . . . . . . . . . . . . . . . . . . . . . . . 14 f
15.6 Containers for Withdrawn Refrigerants. . . . . . . 14 �
15.7 Substitution of Kind of Refrigerant. . . . . . . . . 14 °
9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 15.8 Refrigerant Stored in Machinery Room. . . . . . . 14 - �
� 9.2 114eta1 Enclosures for Soft Copper Tubing. . . . . . 10 15.9 Masks or Helmets. ... . . . . . . . . . . . . . . . . . 14 �
9.3 Specific Minimum Requirements for Refrigerant 15.10 Maintenance . . . . . . . . . . . .
. . . 15 '
Pipe and Tubing. . . . . . . . . .'. . . . . . . . . . . . 10 15.11 Responsibility as to Operation of System. . . . . 15
� 9.4 Joints and �2efrigerant-Containing Parts'in' Air !
15.12 Pressure Gages . . . . . .,. . . . . . . . . . . . . . . 15
� Ducts. . . . . . . . . . . . . . . . . . . . . . . . ... . . . 10 �
9.5 Exposure of Refrigerant Pipe Joints . . . . . . . . . 10 Section 16 - Titles and $ources of Reference Standards . 15
9.6 Stop Valves. . . . . . . . . . . . . . . . . . . . . . . . . 10
9.7 Location of Refrigerant Piping . . . . . . . . . . . . 11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ASA B 9.1 1965 � 3 �
� � American Standards Association Sectional Committee B9 — 1964
, R. L. Wifliams, Chairman �
. 3. R. Chambertoin, Vice Chairman • r
L. A.CaPvey,.Secretary ,
7he American Society of Heating, Refrigera4ing and Air-Conditianing �
. Engineers' Representatives ��
J. R. Cham6erlain W. W. Grear (Alfemate)
F. J. Drogasch A. J. Hess (Alternote)
A. I. McFarlan W. W. Higham (Alternate)
R. L, Williams
The foiiawing Subcommittee wit) have the responsibilities o£ interpreSing
� the provisions of fhe ASA 89.1-1964 St�fefiy Codo and of submitting future
recommendations to the Sectional Committee for future revisions of the Coda.
(nqviries ond suggesiions in thes regard shoutd be submitted ta Shem through
the Chnirman or the Secretary o# the Subcommittee at Yhe Amecicon Society of '
hleating, Reirigerating and Air Canditioning Engineers, 345 E, 47th Stre�tt,
New York, N. Y. i d0i 7. ` `
Interpretati•ons Subcommittee — 1964
' J. R. Chamberinin, Chairman L. J. Wal(ace
• C. F. Brooks A. J, Hess 's�:�
j F. �. Drogosch . G. H. Pope
H. P. Tinning, Secretary
• ��REwoR�
Th�s Safety Code for Mechflnicol Ftefrigerotian is sponserad by The Americon Saciety
of Heating, F2efrigerating and Air Conditioning Engineecs undet the rulss and regulations
of the American Stando�ds Association Inc. as Project B9,
Complete adrninistrative detoils o�e not provided as they wilt nc+eessanty vary in
differeni states and muoicipalities. �
Most of the refrigeration-producing equipment, household, commercial, ar indust�ial, ��
is manufactured by companies whose business is nation-wide. It is, therefore, desirable
that this Cocfe be universally adopted sa that sofe#y provisians {or refrigerating instolla-
fians wil) be slandcrdized, thereby permitting qutsntily productian o4 re£rigerating equip-
me�t with minimum cost to tho user.
� A standing Sectional Committee is provided to keep the provisio�s of this Code
abreast of the odvancements in the ort of refrigeratian.
, Words italicixed in tha text have been specifieally defined in Section 2 end are
. used in accow�dance with those definitions.
r
Section 1. SCOPE AND PURPOSE its adoption. In cases of practieal difficulty or unnecessary
hardship, the authority having jurisdiction may grant exeep-
1,1 $cope. The a�plication of this Code is intepded to in- tions from the litera2 reguirements of this Code or permit the •
sure the safe design, construction, instaElation, operation, use of other devices or methods, but only when it is cleatly
and inspectian of every refri�eratin� sysfem employing a evident Lhat equivalent pratection is thereby secured.
fluid which is vaporized and is normally liquefied in its
refrigerating cycle, whelt employ8d und8r the occupancy No1'E: 'i`o secure the un3form apgiication of thia Code, authorl-
classifications listed in Section 3.The provisions of this tles having jurisdiction are urged, before tendering decislons on
disputed points, to consult the commiitee which formuIsted it—the
CodC are not itttended to apply to the use of water oT airi as Commitiee on Sqfery Code for Mechanlcal Refrigeretion, B9, in
a refrigerant nar t4 refri�eratin� systems inSta22ed on rail- care of the American Standards Association,Incorpaxated, 24East
road cars, motor vehicles, matar drawn vehicles or on shi 40th Stceet, New York, N.Y. 10016, or 4he Amertcan Society of
P' Heating, RetrigeraYing and Air-Conditioaing� Engineers, Inc., 345
board. (For shipboard installations see ASA B59.1-1964), Eest a7th street, .Iew York, N.Y. 1po17,
1.2 Purpose. This Cpde is intended to provide reasonable Section 2« DEF(NiTI0N5
sr�feguards to life, Iimb, health, and property; to correct'cei-
tain practices which are inconsisient wzth safety;and to pre- �•� Absorber (Adsorber) is khat part af the low side of an
scribe standards of safety which will properly influence'fu- $�sarption system used for absorhing (edsorbing} vapor re-
Yure grpgress and davelapments in refrigerating systems. �rigerant.
I Equipment listed by an approved, nationally recognized 2�2 Absorption System—see 2.52.1,
testing]aboratory,as defined in 2.3.1, is deemed to meet the I
design, manufacture, and factory test requirements af this 2.3 Appraved means acceptable Yo the authorities having
C'ode or equivalent, for the refri�erant ot refri$erants for jurisdiction. i
hi�h such equipment is designed. I
3.3.1 An Approved Nationallq Reco�nized Testin� Labor-
1.3 Application. "Chis Cade shall apply to refrigeralin� sys- atory is one acceptable to the authorities having jurisdic-
terns installed subsequent ta its adoption anfl to parts re- tian, that provides uniform testing and examination proce» ��
placed.or added to systems installed prior or subsequent to dures under established standards, is praperly orgenized, '
, 4 ASA B 9.1 1964
, equipped, and qualified for testing, and has a follow-up 2.26 Humanly Occupied Space is a space normally fre-
inspection service of the current produciion of the listed Quented or occupied by people but excluding machinery
producfs.
. rooms and walk-in coolers used primarily for refrigerated
• 2.4 Brazed ,Ioint, for the purpose of this Code, is a gas- storage.
tight joint obtained by the joining of inetal parts with alloys 2.2� Indirect Closed-Svrface System—see 4`.3.2.
,�-�, • which melt af temperatures higher than 1000 F but less than
� �
��a the melting tcamperatures of the joined parts. 2.28 Indirect Open-Spray System—see 4.3.1.
2.5 Brine is any liquid, used for the. transmission of }ieat 2.29 Indirect System—see 4.3.
without a change in its state, having no flash point or a
flash point aUove 150 F determined by American Society for 2•30 Indirect Vented Closed-Surface System—see 4.3.3.
i Testing and ivtaterials method D93.62 (see 16.1). 2,31 Intema] Gross Volume is the volume as determined
� 2.6 Com anion or Block Valves are from internal dimensions of the container with no allowance
p pairs of mating stop for volume of internal parts. �
valves, valving off sections of systems' and arranged so that
these sections may be joined before opening these valves 2,32 Limited Charged System is a system in which, with
or separated after closing thein. . the compressor idle, the internal volume and total refriger-
2.7 Compressor is a specific machine, with or without ac- ant charge are such that the design working pressure will
cessories, for compressing a given refrigerant vapor. not be exceeded by complete evaporation of the refrigerant
charge.
, 2.8 Compressor Unit is a condensin� unit less the conden- 2,33 Liquid Receiver is a vessel permanently connected to
ser and liquid receiver, a sysYem by inlet and outlet pipes for storage of a liquid
2.9 Condenser is a vessel or arrangement of pipe or tubing retri�erant.
. in which vaporized refrigerant is liquefied by the removal 2.34 Lobby is a waiting room, or large hallway serving as a
of heat, waiting room.
2.10 Condensing Unit is a specific refrigerating machine 2,35 Low Side means the parts of a refrigeratin� system
combination for a given refrigerant, consisting of one or under evaporator pressure, "
more power-driven compressors, condensers, liquid receivers ;
(when required), and the regularly fumished accesso'ries. 2.36 Machinery is the refrigerating equipment forming a part
' of the refrigerating system including any or all of the follow-
2.11 Container is a cylinder for the transportation of refri�- ing: compressor, condenser, �enerator, absorber(adsorber),
erent.(see 16.2). liquid receiver, connecting pipe, or evaporator. g
�
2,�� Departmer�� StBt'@ is t�e ent��e sgace occupied by one ���� �aFhi��ty d�eB111 @� �'@��3fr�d by S�Et19(� 6� �� � T��fit
t@netYf 8� fr7o�� fh�n b�ie t'efi�r�� �i $fi �fi�S��dilaS g(br€ W}1�fe ' �rhich a r6fri�eratin� sysfem is permanen{ly instalied and �
� more than 100 persons commonly assemble on other than the operated but not includingevaporators located in a cold stor• �
street-level floor for the pu:pose of buying personal wear- age room, refrigerator box, air cooled space, or other en- �
ables and other merchandise, closed space. Closets solely contained within, and open-
ing only into, a room shall not be considered machinery
' 2.13 Design Working Pressure is the maximum allowable i
, � working pressure for which a specific part of a system is de- rooms but shall be considered a part of the machinery room i
signed. in which they are contained or open into. It is not the intent �
of this definition to cause the space in which a self-con-
2.14 Direct System—see 4.2. tained system is located to be classified as a machinery
room. (See 8.11). �
2.i5 Double Indirect Veated Open-Spray System—see 4.3.4. �
• 2.38 Machinery Room, Class T as required by Section 6, is
2,16 Double (or Secondary)Refri�erant System—see 4.4, a room having machinery but no flame-producing apparntus �
I2.17 Duct is a tube or conduit used for conveying or encas- Permanently installed and operated and also conforming to �
ing purposes as specifically defined below: the following:
• a) Air duct is si tube or conduit used for conveying air. a) Any doors, communicating with the building, shall be E
, (The air passages of self-contained systems are not to approved self-closing, tight-fitting fire doors. s
be construed as air ducts.) b) Walls, floor, and ceiling shall be tight and of not less !
b) Pipe duct is a tube or conduit used for encasing pipe. �an one-hour fire-resistive construction.
c) It shall have an exit door which opens d'uectly to the R
c) Wire duct is a tube or conduit used for encasing either r
moving or stationary wire, rope, etc. outer air or through a vestibule-type exit equipped with
self-closing, tight-fitting doors. �
2.18 Entrance is e confined passageway immediately adja- d) Exterior openings, if present, shatl not be under any �
cent to the door Yhrough which people enter a building. fire escape or any open stairway.
e) All pipes piercing the interior walls, ceiling, or floor
2.19 Evaporator is that parY of the system in which liquid of such room shall be tightly sealed to the walls, ceil-
refrigerant is vaporized to produce refrigeration.• ing, or floor through which they pass. -
t) Emergency remote controls to stop the action of the �
� . 2.20 Exit is a confined passageway immediateIy adjacent to refri�erant compressor shall be provided and located
the door through which people leave a building. •
, immediately outside the machinery room.
' 2.21 Expansion Coi! is an evaporator constructed of pipe or g) An independent mechanical ventilation system shall i
tubing. be provided. I
' h) Emergency remote controls for the mechanical means of
2.22 Fusible Plug is a device having a predetermined- ventilation sha/l be piovided and located outside the �
temperature fusible membet for the relief of pressure, machinery room. ,
' 2.23 Generator is any device equipped with a heating ele-
meni used in the refrigetating system to increase the pres- 2•39 Manvfactvrer is, for the purpose of this Code, the com-
sure of refri�erant in its gas or vapor state for the purpose Pany or organization which evidences its responsibility by
of liquefying the refri�erant. affixing its name or nationaliy registered trade-mark or trade �
`� . name to the refrigeration equipment concemed.
2.24 Ha!lway is a corridor for the passage of people. 2,40 Mechanical �
Joint, for the purpose of this Code,is a gas-
2.25 High Side means the parts of a refrigerating system un- tight joint, obtained by the joining of inetal parts through a �
der condenser pressure. ' positive-holding mechanical constructior�. j
!
�
r
ASA B 9.1 1964 � �
�
� . f
. . . !
'2.41 Ndnposifive Displacefient Compressor is a compressor 2.58 Sofdered Joint, for the purpose of this Code,is a gas-
• in which increase in vapor pressure is attained without tight joint obtained by the joining of inetal parts with metal-
changing the intemal volume of the compression chamber. lic mixYures or alloys which melt at iemperatures below
1000 F and above 400 F.
2.42 Piping means the pipe or tube mains for inter-connect-
'ag the various parts of a refrigerating system. 2.59 Stop Va]ve is a shut-off for controlling the flow�of re-
fri�erant. �
..4� Positive Displacement Compressor is a compressor in E �#�
which increase in vapor pressure is attained by changing the 2.60 Tenant, as herein used, shali be construed as a per- �s�!'
intemal volume of the compression chamber. son, firm, or corporation possessed with the legal right to
occupy premises.
2.44 Premises are the buildings and that part of the grounds ,
of one property, where an installation would affect the 2•6� Unit System—see 2.52.4.
the safety of those buildings or adjacent property. 2,62 Welded �
Joint, for the purpose of this code, is a gas-
2.45 Pressure-Imposing Element is any device or portion of tight joint, obtained by the joining of inetal parts in the
the equipment used for the puipose of increasing the re- Plastic or molten state.
frigerant vapor pressure. Section 3. OCCUPANCY CLASSIFICATION
� 2.46 Pressure-Limiting Device is a pressure-responsive �
mechanism designed to nulomatzcaily stop tho operation af 3.1 Lacations govorned by thta Code in which refriQereting
the pressure-imposing element at a predetermined pressure. systems may be placed are grouped by occupancy as follows:
2.47 Pressure-Relief Device is a pressure-actuated valve or 3.1.1 Institutional Occupancy shall apply to thaY portion
rupture member designed to automatically relieve excessive of the premises in which persons are confined io receive
pressure. medical, charitable, educational, or other care or treatment,
or in which persons are held or detained by reason of public
2.48 Pressure-Relief Valve� is a pressure-actuated valve or civic duty, including among others, hospitals, asylums,
held closed by a spring or other means and designed to sanitariums, police stations, jails, court houses with cells,
automatically relieve pressure in excess of its setting, and similar occupancies. I
.�:.,
2.49 Pressare Vessel is any refrigerant-containing recep- 3.1.2 Public Assembly Occupancy shall apply to that por-
tacle of a re(ri�erating system, other than evaporators (each tion of the premises in which persons congregate for .civic,
separate section of which does not exceed '/s cubic foot of political, educational, religious, social, or recreational
refrigerant-containing volume),expansion coils,compressors, purposes; including among others,armories, assembly rooms,
controls, headers, pipe, and pipe fittings, auditoriums, ballrooms, bath houses, bus terminals, broad-
• � casting studios, churches, colleges, court houses without
2.50 Receiver—see 2.33. cells, dance halls, department stores, exhibition halls,
2.51 Refrigerant is a substance used to produce refrigera- fraternity halls, libraries, lodge rooms, mortuary chapels,
tion by its expansion or vaporization, museums, passenger depots, schools, skating rinks, subway
stations, theaters, and similar occupan�ies.
2.52 Refrigerating System is a combination of inter-con-
nected refrigerant-containing parts constituting one closed 3.1.3 Residentiol Occupancy shall apply to that portion
�efrigerant circuit in which a refri�erant is circulated for the of the premises in which sleeping accommodations are pro-
vided, including among others, club houses, convents, dor- �
pu�pose of extracting heat. (See Section 4 for classification . i
of refrigeratin� systems by type.) mitories, hotels, lodging houses, multiple story apartments,
residences, studios, tenements, and similar occupancies.
2.52.1 Absorption System is a refri�erating system in
which the gas evolved in the evaporator is taken up by an 3.1.4 Commercial Occupancy shall apply to that portion
al3sorber or adsorber. of the premises used for the transaction of business; for the
rendering of professional services; for the supplying of food,
2.52.2 Sealed Absorption System is a unit system for drink, or other bodily needs and comforts; for manufacturing
Group 2 refri�erants only in which all refrigerant-containing purposes or for the performance of work or labor (except as
parts are made permanently tight by welding or brazing �cluded under 3.1.5 Industrial Occupancy) including among
against refrigerant loss. (This is a restrictive definition for others, bake shops, fur storage, laboratories, loft buildings,
the purposes of this Code as used in 6.1.2 and 6.3.1). (See markets, office buildings, professional buildings, restau-
2.52.1). rants, stores other than department stores, and similar oc-
2.52.3 Self-Contained System is a complete factory-made cupancies.
and factory-tested system in a suitable frame or enclosure 3.1.5 Industrial Occupancy shal/ apply to an entire build-
which is fabricated and shipped in one or more sections and �g or premises or to that portion of e building used for
in which no refrigerant-containing parts are connected in the manufacturing, processing, or storage of materials or
field other than by companion or block valves. products, including among others, chemical, food, candy and
, 2.52.4 Unit System is a self-contained system which has ice cream factories, ice making plants, meat packing plants,
been assembled and tested priorto its installation and which refineries, perishable food warehouses and similar oc-
is installed without connecting any refrigerant-containing cupancies, provided the entire building is occupied by a
, parts. A unit system may include factory-assembled com- single tenant.
psnion or block valves. 3.1.6 Mixed Occupancy shall apply to a building occupied
If 2.53 Rupture Member is a device that will rupture at a pre- °S used for different purposes in different parts. When the
determined pressure, occupancies are cut off from the rest of'the building by
tight partitions, floors, and ceilings and protected by self-
� 2.54 Shall. Where "shall" or "shall noY' is used for a pro- closing doors, the requirements for each type of occupancy
vision specified, that provision is intended to be mandato 'ry. shall apply for its portion of the building or premises. For
example, the cold storage spaces in retail frozen food
2.55 Should. "Should" or "it is recommended" is used to lockers, hotels, and department stores in buildings occupied
indicate provision� which are not mandatory but which are by a single tenant mighf be classified under Industrial Oc-
pointed out here as recommended good practice, cupancy, whereas other portions of the building would be
2.56 Sealed Absorption System—see 2.52.2. classified under other occupancies. When the occupancies
are not so separated, the occupancy carrying the more f
2.57 Self-Contained System—see 2.52.3. stringent requirements shatl govem. � i
. ^
6 ASA B 9.1 1964
3.2 Adiacent Loca4ions. Equipment installed in locations
� adjacent to areas outlined in 3.1.1 through 3.1.6, including
outdoor installations, shall be governed by the applicable
- requirements of this Code.
Section 4. REFRIGERATING SYSTEM /`/\ � ',
CLASSIFICATION BY TYPE SECO\DARI'CIRCUfT \/ DOUBLE REFRIGER�NT SYSZEM
� . 4.1 Refrigerating `Systems (see 2.52) shall be divided into � I�ITRCHA':CER
- classes, descriptive of the method employed for extracting
heat as follows in 4.2 to 4.4, inclusive. The direct, indirect }
_ ce��e�sea <
and double refri�erant systems are illustrated in Figures I � � aECEI<<q — raiwnv c�Rccrt
and IA.
4.2 Direct Systeem is one in which the evaporator is in '� cooLiNc
direct contact wi.th the material or space refrigerated or is � �T �HnnAER
located in a.ir-circulating passages communicating with such �CO.YllF.S�OR$/ �
SpaCeS. RECEIVER
F' I C. SA.
4.3 Indirect System is one in which a liquid, such as brine
or water, cooled by the refrigerant, is'circulated to the
material or space refrigerated or is used to cool air so
' circulated. Indirect systems which are distinguished by the , Seetion 5. REFRIGERANT CLASSIFICATION*
type or method o2� application are as given in the following
para�raphs: *Numerical Refrigerant Designation from ASHRAE Standard
4.3.1 fndirect f3pen-Spray System is one in whicha liquid, 34-57 (American Standard B79.1-1960) (See 16.19)
such as brine or water, cooled by an evaporator located in
• an enclosure external to a cooling chamber, is circulated to 5.1 Generol. Refrigerants are, for the purposes of this Code,
such cooling chamber and is sprayed therein, divided into groups as follows:
4.3.2 Indirect Closed-Surface System is one in which a 5.1.1 Group I
liquid such as brine or water, cooled by an evaporator lo- Carbon dioxide (Refrigerant 744) . . . . . . . . . . . . . . COz
' cated in an enclosure external to a cooling chamber, is Dichlorodifluoromethane (Refrigerant 12) . . . . . . .CC11Fz
circulated to and through such a cooling chamber in pipes or Dichlorodifluoromethane, 73.8%. . . . . . . . . . . .CC12Fz�
other closed circuits. and Ethylidene Fiuoride, 26.2% . . . . . . . . . .CH�–CHF1
4.3.3 lndirect Vented Closed-Surface System is one in (Refrigerant 500)
which a liquid, such as brine or water, cooled by an evapo- . Dichloromethane (Methylene chloride)
rator lbcated in a vented enclosure external to a cooling (Refrigerant 30) . . . . . . . . . . . . . . . . . . . . .CH=Cll
chamber, is circulated to and through such cooling chamber Dichloromonofluoromethane (Refrigerant 21) . . . . CHC1�F
in pipes or other closed circuits. Dichlorotetrafluoroethane (Refrigerant 114) . . . . .C�C1zFa
4.3.4 Double Indirect Vented Open-Spray System is one Monobromotrifluoromethane (Refrigerant 13B1) . . . .CBrF3
in which a liquid, such as brine or water, cooled by an Monochlorodifluoromethane (Refrigerant 22) . . . . .CHC1Fz
evaporator located in a vented enclosure, is circulated Monochlorodifluoromethane, 48.8% . . . . . . . . . . .CHC1Fz
through aclosed circuit to a second enclosure where it cools and Monochloropenta-fluoroethane, 51.2% •
�� another supply of a liquid, such as brine or water, and this (Refrigerant 502) . . . . . . . . . . . . . . . . . .CCIF1CF3
liquid in tum is circulated to a cooling chamber and is Monochlorotrifiuoromethane (Refrigerant 13) . . . . CC1F;
sprayed therein. OctafluorocycIobutane (Refrigerant C318) . . . . . . . .C4Fe
4.4 Doubfe (or Secondory) Refrigerant $ystem is one in Trichloromonofluoromethane (Refrigerant 11),. . . . CC13F
which an evaporative refri�erant is used in a secondary cir- Trichlorotrifluoroethane (Refrigerant 113) . . . . . .C=C13F3
. cuit. For the purpose of this Code, each system enclosing 5.1.2 Group 2
a separate body of an evaporative refrigerant shall be con-
I sidered as a separate direct system. Ammonia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .NH3 �
Dichloroethylene . . . . . . . . . . . . . . . . . . . . . .C=H2Clz
Ethyl chloride . . . . . . . . . . . . . . . . . . . . . . . .C�HS Cl
� � ` Methyl chloride . . . . . . . . . . . . . . . . . . . . . . . :CH3C1
Methyl formate . .HCOOCH3 �
S.ulphur dioxide . . . . . . . . . . . . . . . . . . . . . . . . . .SO�
REFR2GERANT�� . DIRECT SYSTEM 5.�.3 GroUp 3 • �
, Butane . . . . . . . . . . . . . . . . . . . . .
i
� BRINE OR WATER COOLE� • • • • • • • • •C4H10 j
BY REFRIGERANT Ethane�. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CaHa �
�h,�.�k � Ethylene . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CzH4 �
�� SRLfiE OR WATER� Isobutane . . . . . . . . . . . . . . . . . . . . . . . . . .(CH�),CH
P� ��� orEx sPRAIYESYSTEM Propane C;I-IB �
, EVAPORBRO� OR WATCR c^oLe� . Section 6. REQUIREMENTS FOR INSTITUTIONAL, t
S sY RSFxictx.�ur PUBLIC ASSEMBLY, RESIDENTIAL, AND
aRzxe oa warex—�� trroixec, COMMERCIAL OCCUPANCiES
p� CLOSED SURFACE SYSTEH �
, ~� RRC�OR WATER COOLED � 6.� General. ,
1 yE�LTBY'REFRIGF.RANT � 6.1.1 Public Stairway, Stair Landing, Entrance, or Exit. '
,�1,
� stti,� OR WATER INDIRECT VENTID No refrigeratiag system shall be installed ia or on a public
I „�p ��. CLOSED SURFACE SYSTEM stairway, stair landing, entrance, or exit. .
F1—'BRITB OR WATER
EVAPORA'C9R COOLED BY
v�Nr� �REFRICERANT 6.1.2 Pubfic Hallwa or Lo66 No refri eratin s stem �
• i � D011BLE INDIRECT VENTED Y Y• �' � Y ''
IBxin� *A� OPEN SPR1Y SYSTEM shall interfere with free passage. No Group 2 refrigerant
wp�tt shal! be permitted in public hallways or lobbies of Institu-
' tional or Public Assembly Occupancies. Refri�erating sys• �
1 P�P p� tems installed in a public ha/lway or lobby shall be limited
� ' � COMPRESSOR�� t0: �
�— COOLINC CtiAAfBER
�� � a) Unit Systems containing not more Yhan the quantities
10E VEI R � of a Group 1 refrigerant specified in Table 1, or '
F I C. I r�
IASA B 9.1 1964 � 4
t
� . ______�_—_______— ____.__'._ _ .-.__' . k
�
�
, b) Sealed Absorp�ion Systems containing not more than 3 content of the smal.lest enclosed humanly occupied space
pounds of Group 2 refri�erant when in Residential and other than the machinery room, shal( be used to determine
Commercial Occupancies. the permissible quantity of refrigerant in the system.,Where a
' 6,I.3 Refrigeront Piping Through Floors. Refrigerant refrigeratrng system has evaporator coi1S serving individual
pipin�s shall no[ be carried through floors except as follows: stories of a building, the story having the smallest'volume
shall be used to determine the maximum quantity of r.efriger-
a) It may be carried from the basement to the first fioor or ant in the entire system. � .
, from the top floor to a mechinery penthouse or to the 6.2.1.3 When the evapo:ator is located in an air duct t
-' roof. system, cubica] content of the smallest humanly occupied
b) For the purpose of connecting to a condenser on the enclosed space served by the air duct system sha/l be used
roof, it may be carried through an approved, rigid and to determine the permissible quantity of refrigerant in the
tight continuous fire-resisting pipe duct or shaft hav- system; however, if the air flow to any enclosed space
ing no openings on intermediate floors, or it may be served by the air duct system cannot be shut off or reduced
carried on the outer wall of the building provided it is below one-quarter of its maximum, the cubical contents of
not located in an air shaft, closed court, or in other the entire space served by the air duct system may be used
similar open spaces enclosed within the outer walls of to determine the permissible quantity of refri�erant in the
the building, system.
c) In systems containing Group 1 refri�erants, the refrig- 6.2.1.4 In Institutional and Public Assembly Occupan-
erant pipin� may also be carried thzough floors, iriter- . cies, direct expansion coils or evaporators used for air con-
mediate between the first floor and the top floor, pro- ditioning and located downstream from, and in proximity to,
vided it is enclosed in an approved, rigid and tight a heating coil, or located upstream within 18 inches of a
continuous fire-resisting pipe dact or shaft where it heating coil, shall be fitted with a pressare relief device .
passes through intermediate spaces not served by the discharging to the outside of the building in an approved
system. Pipin� of direct systems, as govemed by manner; except that such a relief device shall not be re-
. 6.2.1, need not be enclosed where it passes through 9uired on unit or se/f-contained systems if the internal vol-
space served by that system. The pipe duct or shaft ume of the low side of the system which may be shut off by
sha11 be vented to the outside or to a space served by valves, divided by the total weight of refri�erant in the sys-
Yhe system. tem less the weight of refrigerant vapor-contained in the
other parts of the system at 110 F, exceeds the specific Ool-
' TABLE i. Maximum Permissible Quantities of ume of the refrigerant at critical conditions of temperature
Group 1 Refrigerants for Direct Systems and pressure.
(NOTE: The above exemption is also stated in formula �
Maximum form below.)
quantity in y
� lb per 1000 '
sha(/ be more than VBp
cu ft of
W�—Wx
h uman I y —
Refri�erant name and rvmber** Chemical occupied Where V� _low side volume, cu ft
formala space* vsp—specific volume at critical conditions of tem- ,
perature and pressure, cu ft per lb
Carbon dioxide (Refrigerant 744) CO2 11' W� =total weight of refrigerant in system, lb
'�ichlorodifluoromethane(Reirigerant 12) CC1�F� 31 W= —�'eight of refri�erant vapor (lb) at 110 F in V2, 1
>ichlorodifluoromethane, 73.8% 2 2 y2 �j
and Eihylidene Fluoride, 26.2% CH3-CHF2� 26 ' _ �f
(Refrigerant 500) ) `specific volume of refrigerant, in cu ft per lb,
Dichloromethane (Methylene chloride) at 110 F, where Vz=total volume of system
(Refrigerant 30) CHzClz 6 less V� cu ft
Dich loromonofluo romethane
� (Refrigerant 21) CHC1zF 13 6.2.2 Indirecf Systems. A system containing more than
Dichlorotetrafluoromethane the quantity of a G:oup 1 refrigerant .allowed in Table 1
(Refrigerant 114) C1C1zFa 44 shall be.of the indirect type with all refrigerant-containing
Monobromotrifluoromethane parts, excepting parts mounted outside the building and pip-
' (Refrigerant 13B1) CBrF3 38 Ing installed in accordance with Paragraph 6.1.3, installed
Monochlorodifluoromethane in a machiner room used for no otHer
y purpose than for me-
(Refrigerant 22) CHC1Fz 22 chanical equipment.
Monochlorodifluorometh:ine, 48.8% and CHC1F2 6.2.3 Open Flames in Machinery Rooms. No open flame
Monochloropentafluoroethane, 51.2%. CC1FzCF� or apparatus to produce an open flame shall be installed in a
(Refrigerant 502) 30
Monochlorotrifluoromethane machinery room where any refrigerant other than carbon diox-
(Refrigerant 13) CC1F� 2� ide is used unless the flame is enclosed and vented to the
Octafluorocyclobutane open air. Tne use of matches, cigarette lighters, halide leak
(Refrigerani C318) C4F8 50 detectors, and similar devices sha/1 not be considered a
T'richloromonofluoromethane violation of this paragraph or of 6.2.4.
(Refrigerant 11) CC13F 35 6.2.4 Open Flames in lnstitutional Occupancies. In In-
Trichlorotrifluoroethane stitutional Occupancies, where more than 1 pound of a Group
(Refrigerant 113) C�C13F3 24 1 refrigerant, other:han carbon dioxide, is used in a system,
any portion of which is in a room where there is an apparatus
*Volatile charge in e control shall not be considered as for producing an open flame, then such refrigerant shall be
refri�erant. classed in Group 2, unless the flame-producing apparatus is
**ASHRAE Designation (see Section 5), provided with a hood and flue capable of removing the prod-
, ucts of combustion to the open air.
6.3 Group 2 Refrigerants
5.2 Group 1 Refrigerants I
6.3.1 Direct Sysfems. Direcf systems containing Group 2
6.2.1 Direc1 Sysfems. The maximum permissible quantity I
of a Group 1 refri�erant in a direct system as specified in refri�erants sha/l not be used for air conditioning for human I
Table 1 except Institutional' Occupancies where further comfort. For other applications, the maximum permissible
limited by 6.2.1.I. quantity of Group 2 refrigerants in a direct system is shown
6.2.1.1 Direct Systems in Institutional Occupancies in Table 2.
hatl be limited to unil systems each containing not more 6.3.2 Indirect Systems. The maximum permissible quan-
� than 20 pounds of Group 1 refrigerants, except in kitchens, tity of Group 2 refrigerent in any indirect system is shown ��
laboratories, and mortuaries. (See 6.2.4.) in Table 3. Such systems shall be of the following type:
6.2,1.2 When the refrigerant-containing parts of a sys- a) Institutional and Public Assembly Occupancies—In-
tem are located in one or more enclosed spaces,.the cubical direct vented c/osed-surface, or double indirect vented
I $ ASA B 9.1 1964
i
� open-spray. - 7.2 Number of Persons. When the number of persons in a. �
• � TASLE 2. Maximum Permissibie Quan4ifies of Group 2 , ='eErigerated space, served by a diiect system, on any floor
Re£rigerants for Direct Systems above the first floor(ground level or deck level)exceeds one
. person per 104 square feet of floor area, the requirements of
• Commerczal Occupancy shait apply unless'that refrigerated
Maximum. sQace containing more than one persan per S00 square feet
�i pounds for zaripus occupancies of floar area abave the first floor is pravided with the re-
i� , 7`ype o/ refrig�rati�tg system quired nnznber of doors opening direct2y into apgroved build- ,
`�
�� . Instizu- PuLlic Resi- Com-
tiorutl assembly derztial mercial �� exits. Such refrigerated space shall be cut off from the
rest of the buiiding by tight construction with tight-fitting
Seated ilLsarption Systems• doors. (See i6.1?)
a� Itij?U�IiCJtftlliUttyS UTLUIJUieS � Q 3 3 IhOTE: The above does not praIubit apenings for the pussage of
b) In ot}�er than pablic hullways ' nroducts from one refrigereted space to enother refrigerated space.
of ZoG6ies U* 6 6 �0
Sel/-Contained or Unit Systems: Section 8. IhISTALLA710N REQUIREMENTS
a) In pu3�l'zc frattways ar lobbies 0 0 4 0
b) In pther thun pnblic halluwys 8.1 Foundations and Supports for condensing units or com-
ar lobbies 0 �0* 6 2q pressor anits shall be of substantial and -non-combustible
canstructiori when more than 6 inchas high. {See $.3}. .
8.2 Moving Machinery should be guarded in accordance with
*Six pounds a2Fowed when installed in kitchens, labora- accepYed safety standards. (5ee 16.3},
tories, and mortuaries. 8.3 Cleor $pace adequate for inspection and servicing of
b) Residential and Gommercial bccupancies—Indirect condensing vnits or compressot units shall be provided.
ve»ted closed-surface, or dovble indirect vented open- $•k �onc4ensing Units ot Compressor Units with Entlosures
spray, or primary circuit of doubte-refrigetant Yype. sha7! be readily accessible foz servicing and inspection.
• 6.3.2.1 Machirrery Rooms for lndired Systems, Group 2 $•5 Water Supply and Discharge Connections shovCd be
, Refrigerants made in accordance with accepted safety and heaith stand- �
� 6.3.2.].1 Indirect systems using Group 2 refrigerants ards. (See 16.4). ; '
not in excess of the quantiYies shown in Colurnn 1 of Table 8•5.1 Discharge water lines shatl not be directly con-
' 3 sha11 have a23 refrigerant-conYaining parts, excegting parts nected to the waste or sewer system.The waste or discharge
mounted outside the builfling and piping installed in accord- from such equipment shall be over and above a trapped and
ance wikh Paragraph 6.1.3, installed in a machinery room �ented plixmbing fikture.
used for no other purpase than far mechanical equipmenY. 8,6 Illuminaiian adequate foz inspection and servicing of
, condensing units oi compressor unils should be provided.
TABl..E 3, Maximum Permissible Quantities af Group 2 (See I6.5).
I Ra{rig0ranfs for 4ndir3et $ystam8 8.T EleclricaE Equipmon! dnd Wtring shaS1 he instailed in
' accordance with accepted safety standards. (See 16.6).
$.8 Gas Fuel Devites and Equipment used with zefrigeratin�
Columnl Column2 systems shalt be installed in accprdance wiLh accegted
Glass T Machinery safety standards. (See 16.7).
MachineryRooms Rooms(see2.3$1> g.g ppen Fiames. When the quantity of fiammahle refriger-
� Occu��arzcy (see 2.37),max tb max lb
I � ant in any one refrigerating system exceeds the amount
IxSstitutianal 0 IVot mare than SOO lb given in Table 4 for each IOOq cubic feet of room volume in
, Pulylic Asseml�ly 0 I\Tot mare than IOOd lb which the system or any part thereof is instalied, then no
' Residential i�ot more than 300Ib 1Vo limit flame-producing device or hot surface above 800 F shall be
Commercial Not more than 600Ib L�o limit permitted in such room and alI electrical equipment in the"
room shatt canform to tke requirements of Fiazardaus Loca-
_ � tions Class I of the latest edition of the National Electrical
, b.3.2.1.2 Zndirect systems using Group 2 refrigerants Code. (See 1&.b). ,
nbt in excess of the quantities shown in Column 2 of Table
3 shrall have all refrigerant-containing parts installed in a 'fAOLE d. fJ�aximum Parmissible Quantities of
. Ctass T mAchinery roam. F(ammable i2efriqerants
6.3.2.1.3 Flame-Froducing Devices, Hot Surfaces, t
j And Electricat Equipment in Machinery Rpoms.Where a ma- � �
' chinery room is required by this Code to house a refri�erat- Maxirr:um qurantity ti
, in� system containing any Graup 2 refri�erant other than Chemical in lG per 1000 cu
, suiphur diaxide, no flame-producing device or hot sur£ace Name • forrnultt ft of raom votume x
! above 800 F shall be permitted in such room anB all 'eleo- $utane C•H,o 21jz •
'� trical equipment in the room shal/ conform to the cequire= Ethane C�Nn 2�/2 !
' ments of HAzardaus Locatians Class I of the Iatest edifion �,ij�yj chtoride CzHuCl 6
• of the National Electrical Code (see 16.6). The use of �F�iylene �:�1 2 �'
matches, czgarette lighters, halide leak detectors, and simi- Isohiitane (CHa)aCH 2�/2
Iar devices shalF not be cansidere@ a violatian af this�ara- �Iethy] chloride CHa�l 10
graph. �Iethyi formate I3CO�CHa 1
, b.4 Group 3 R¢frigerants Pr°p''txe {''x" 2�/2
b.4.1 Group 3 refri�erants shall not be used 'ut Institu-
• tzanal, Fublic Assembly, Residential, or Cammercial Oc- g•70 Flammable Refrigerants as listed in Table 4 shpll not
cupancies except isi Iabaratpries far Comme:cial Occupan• be used in a refrigerafin� system in excess af 1400 pounds
cies. In such laboratary insYal2ations oniy anit systems con- unless approved by the authority having jurisdiction.
taining not more than 6 pounds shal! be used ixnless the 8•�1 Machinery Room Requiremen4s (see Dejinitions 2.37
number of persons does nat exceed one person per 100 and 2.38}. .
square feeY of laboratory floor area, in which case the $•��•, Each refrigerating machinety room shall be pro-
' requirements for Industrial Occupancy shall apply. vided with tight-fitting doar or doors anfl have »o partitio»s
or openings that wi22 permit the passage of escaping refrig-
erant to other parts of the building.
Sectian 7. R�Qt71REMEN7S FOR MDt3STR1AL $.11.2 Each refrigerating machinery room shatt be pro-
y+. ' OCCUPANCIES vided with means far ventilation Yo the outez air. The venti-
�� lation shalt�consist of windows or doors opening to the outer
7.1 Generol. 'rtiere sha17 be no restrictions on the quantity air, of the size showa in Tab2e 5, or of inechanical means
or kind of refrigerant used in an Industrial Qccugancy, ex- capable pf removing the air from the room izi accordance
cept as specified in 7.2 and 8.10. with Table 5. The amount of ventilation for refrigerant re-
ASA 8 9.1 i964 9
4
�
moval purposes shafl be determined by the refrigerant con- Group II and Group III refrigeranf liquid lines for sizes 13/z
' tent of�the largest s}�stem in the machinery room. inches and smaller.
8.11.3 Mechanical Ventifation, when used, shall consist No less than Schedule 40 wall thickness carbon.steel or !
of one or more power-driven exhaust fans, which sha71 tie Wrought iron pipe (See I6.10) shall be used for Group I re� �
capable of removing from the refrigerating machinery-room frigerant liquid lines sizes 6 inches and smaller, Group II I
the'amount of air specified in Table 5. The iniet to the fan, and Group III refri�erant liquid lines sizes 2 inches'through I
or fans, or air duct connection shall be located near the 6 inches, and Group I, Group II, and Group III refri�erant � ,
gfrigerating equipment. The outlet from the fan, or fans, or vapor lines 6 inches a�d smaller.
air duct connections shall terminate outside of the building gutt-Welded carbon steel and butt-welded wrought iron pipe
in an approved manner, When air ducts are used either on the shall not be used for refri�erant liquid lines.
inlet or discharge side of t:he fan, or fans, they shall have an I
area not less than specified in Table 5. P:ovision should be Cast iron pipe shall not be used for Group I, Group II, or
made for the inlet of air to replace that being exhausted. Group III refrigerant lines. ,
� 8.11.4 Class T Muchinery Rooms in basements or sub- 9•3.2 Standard iron pipe size copper and red brass (not
basements (see Definition 2.38) shal( have, as specified in less than 80 per cent copper) pipe may be used and sha1l
Table 5, mechanical ventil.ation operating continuously. conform to ASTM Specification B-42 (See 16.11) for copper
8.12 Air Duct Systems uf air-conditioning equipment for Pipe and ASTM Specificafion B-43 (See 16.13) for red brass
human comfort using mechanicai refrigeration should be in- Pipe.
stalled in accordance with accepted safety standards. (See 9•3.3 Watertube size hard copper tubing used for refrig-
I 16.8 and 16.9). erant pipiag erected on the premises sho11 conform to ASTi�4
Specifications B88-62 Types K or L (See 16.13), for dimen-
sions and specifications, except that copper tubing�vith out-
TABLE 5. Minimum l�ir Duct Areas and Openings side diameters of 1/4 inch and 3/8 inch shal( nave a mini- `
mum nominal wall thickness of ziot less than 0.030 inch and
Weight of liAechnaical Open areas of 0.032 inch, respectively. � �
, re/rigerant disclearge Duct area, windoius and 9.3.4 Soft annealed copper tubing used for refri�ernnf
in systena,lL of uir,cJm sry ft doors sq/t piping erected on the premises shall not be used in sizes
up to `l0 I50 �/ 4 larger thanl-3/8 inch Standard Size(1.375 outside diameter).
:i0 2y0 1/3 G Mechanical Joints shall not be used on soft annealed co�per
100 400 1/2 10 tubing on•sizes larger than 7/ft inch Standard Size (0.875
' ]$0 550 2/3 12�/Z outside diameter). It shall conform to ASTM Specifications
200 G80 2/3 lh g2g0-62.(See 1b.14.) Minimum nominal wall thickness of soft
2:i0 800 1 15
3�� 9�fl 1 17 annealed copper tubing sha(1 be as follows:
A00 1,100 1�/.i 20
S00 ' 1,275 1�/� 22 Standard Outside Wall
(00 1,450 11/ 24 Size Diameter Thickness
700 1,630 11/2 26 In. In. In.
800 1,800 2 28 1/4 0.250 0.030
900 1,950 2 30 , 3/8 0.375 0.032
1,000 2,(1�0 2 31 1/2 0.500 0.032
1,250 2,250 2i/ 33 •
1,500 2,500 2i/4 37 5/8 0.625 0.035
� I,750 2,i00 21/ 38 3/4 0.750 0.042 �
, 2,000 2,900 21/ 40 7/8 0.875 0.045 i
2,�00 3,300 2i/2 43 *1 1.000 0.050
3,000 3,7C0 3 48 1 1/8 1.125 0.050
4,000 4,(00 33/ 55 *11/4 1.250 0.055
5,000 S,S00 4�/ 62 1 3/8 1.375 0.055 "
(,000 (,300 5 68
' 7,000 7,200 5�/ 74 *Not included as standard size in ASTM 8280-62.
• 8,000 3,000 53/� 80
9,000 8,700 6�/ 85 9.3.5 Sweat joints on copper tubing used in refrigerating
10,000 9,500 6�/Z ' 90 systems containing Group 2 or Group 3 refrigerants sha/] be ^
• 12,000 10,900 7 100 brazed joints. Soldered joints sha7/ not be used in such re-
14,000 1�,200 7�/l 109 frigerating systems.
1Fi,000 13,300 73/.1 11A 9.4 Joints and Refrigerant-Containing Parts in Air Ducts.
18,000 1��,300 8 12� Joints and a11 refrigerant-containing parts of_a refri�erating
20,000 15,200 8�/q 130 system located in an air duct of an air-conditioning system •
2i,000 17,000 ' 83/ 140
30,000 18,200 9 j�j carrying conditioned air to and from a hvman/y occupied
3y,000 79,100 9�/.y 150 space shall be constructed to withstand, without leakage, a
, 10,000 20,50� 9�/ 155 ' temperature of 1000 F,
�15,000 21,500 9•%+ 160 9.5 Exposure of Refrigerant Pipe Joints. Refrigerant pipe
joints e:ected on the premises shal/ be exposed to view for
visual inspection prior to being covered or enclosed.
Section 9. REFRIG�RANT PIPING, VALVES, 9.6 Stop Valves
FITTItdGS, AND RELATED PARTS 9.6.1 Genera/ Requirements. All systems containing more
than 50 pounds of a Group 1 refrigerant or 6 pounds of a
9.l General. Refrigeralin� pipin�, valves, fittings, and re- �roup 2 or 3 refri�erant, other than systems utilizing non-
lated parts used in the construction and installation'of re- positive displacement compres5ors, shall have sfop valves
frFgerating systems sha11 conform to the American Standard installed as foilows:
Code for Pressure Piping. (See 16.10). a) Each inlet of each compressor, compressor unit, or
9.2 Metal Enclosures or Pipe Ducts for Soft Copper Tubing. condensing unit;
. Rigid or flexible metal enclosures shall be provided for soft, b) Each discharge outlet of each compressor, compressor
anqealed copper tubing used for refrigerant pipinb erec:ed anit, or condensing unit, and of each liquid receiver.
on the premises and containing other than Group 1 refriger- 9.6.2 Systems Containing I00 Pounds or More of Re-
ants. No enclosures shall be required for connections be- frigerant. All systems containing 100 pounds or more of a
tween condensin� unit and the nearest riser box, provided refri�erant, other than systems utilizing nonpositive dis-
uCh connections do not exceed 6 feet in length. placement compressors, shall have stop va/ves, in addition Q
9.3 Specific Minimum Requirements for Refrigerant Pipe to those in 9.6.1, on each inlet of each liquid receiver ex-
and Tubing cept that none shall be required on the inlet of a receiver in J
9.3.1 No less than Schedule 80 wall thickness ca:bon a condensing unit nor on the inlet of a receiver which is an
steel or wrought iron pipe (See 16.10)'shall be used' for integral part of a condenser.
jQ ASA B9.1 1964 .
I9.b.3 Stop valves used with soft annealed copper tubing unit systems equipped with a pressure-relief device may be
' • • or hard drawn capper tubing 7/8 inch standard size (0.875 tested and proved tight at a pressure not less than Ii/z times
outside cIiameEer} or smaller shall be securely .mounted, the setting of the pressure•relief device.;
independent pf tnbing fastenings or sup�orts. 10,3 Equipmeni l..isted by an Approved Nalionn2ly F2ecog-
I ' , 9.6.4 Stop valves sha11 be suitably labelled if it is not nized Testing Laboratory havin� a folloui-up inspection ser-
obvious what they control. Numbers may be used to label the vice sha7t be deemed as meetiqg the intent of Yhe require-
valves provided a key to the numbers is tocated near the m.ents af 1Q.1 and 14.2.{See 1.2 and 2.3.1.}
� valves. 10.4 Pressure•Limiling Devices
, 4.7 Location of Refrigerant Fiping 10.4.1 Pressure-limiting devices shall be provided on all
9.7.1 Refri,�eranl pipin� crossing aa open sgace which systems containing more than 2d pounds af tefrigerant and
affords passageway in any building shall be not less than , operating above atmospheric pressure, aad on a21 water
7�jx fee� ahove the f2oar un2ess against the ceiling of such cooled systems so constructed that the cpmpressor ar �en-
space, eratar is capabie of producing a pressure in excess of the
9J.2 Free passageway shall not be obstructed by refri�- test pressure; except water cooled unit systems containing
erant pipin�. Refri�erant piping sha71 nat be placed in any nat rnore than 3 paunds af a Group 1 refrigerant providing
elevator, durnbwaiter, or othsr shaft containing a moving the operatirtg pressure developed in the system with the
object, or in any shaft which has apenings to living quarters water supply shut off does not, eaceed one•fifth the uliimate
or to main exit hattways. Refrigeranf piping snatl not be strength of the system, or providing an overlaad device
placed in public hallways, labbies, or stairways, except wiil stap the action of the compressor before the pressure
that such refrigerant pipin� may pass across a public haXl- exceeds one•fifth the ultimate stren�th of the system.
way if there are no joints in the section in the gublic ha1T- 70.4.2 The maximutn setting to which a pressure limiiin�
way, and provided nonferrous tubing of 1 inch nominal di- �evice may readiiy be set by usa of the adjusting means pro-
' ameter {I-I J$ inch outside diameter) and smaller be con- �ided shall not exceed 90 percent oP the setting of the
tained in a rigid meYai pipe.
pressure-reliet device installed on the hi�h side of a sys-
fem, 90 percenY a£ the refrigerant Ieak field test pxessura
• Section 10. DESIGN AND CONS7RUCZ'ION actually applied, or 90 percent of the design working pres-
OF EQUIPMENT sure of the hi�h side of the system, whichever is smallest. I
{A1sa see Seciion 11 for gressure vessels) The pressure-lrmitrng devrce shatl stop the `action of the
pressvre-imposing e(ement at a pressure no higher than this
' ]O.i General maximum setting. In determining this maximixm setting for
10.1,1 Every part of a refrigerating system, with the ax- systems erected an the premises and field leak tested in
ception of pressure gages, control mechanisms and limited accordance with 14.1.1, 90 percent of the leak test pres-
charged systems, sha7t be designed,.constructed, and as- sures in Table 6 may be utilized in Iieu of khe field test
sembled to be capabie of withstanding s Yest pressure not pressure actually applied. {See 14.1 and 14.1.1 for sninimum
�ess than the minimum tefri�erant leak field test pressuro rafrigerant leak field test pressures.}
specif'xed xn TabFe 6 w'xthqut being stressed beyond one- i0.4.2.T On systems using npnpositive disp4acement
third of its ultimate strength.(5ee 10.2.)Limited charged sys, compressors, the pressura•timiting device may be set at the
tems equipped with a pressure-relief device,-shall be de- pressure settin� o� the relief device, the retri�era»t leak
signed, canstructed, and assembled to be capable of with- field test pressure. actually applied or the design workin�
standing a test pressure not less than 1.5 times the setting pressure of tha high side af the system, whichever is sma2l-
, � of the pressure relie£ device withaut being stressed beyond est, provided the ptessure.relief device is subject to !aw
lf3 of its ultimate strength. side pressure and fhe�re are na stpp vatves on the system as
�, NOTE: This paragraph estabiishes a minimum dasign working as exempted by Paragragh 4.6 for nongositive displacement
prossure in tcrms af the field test pressure so that the minimum compresS4rs. .
refrigerant leak fiel<3 test pressure, specified in Table 6, can be �Q,Q,3 Pr@ssLrte-limltin� .dBvlCes shall bB COrul6ctBd, �
safely applied. Rules governing pressure-telief dovicos, pressura- wlth ri0 1ritQSVeriln� SIOp V81V@S, between Yhe pressure-im-
' 1lm1t3ng devices, etc., shatl be based an the 8estgn watking
, , pressure selected, pasin� element and any s(op vaCve on the discharge side.
70.1.2 AII materia2s used in the canstruction and instal- ��'� E-'4�id Leve( Gaqe Glasses,exceptthoseof Yhe bu21's-
lation pf refrigeratin� sysfems shaT1 be suitable for convey- eye or reflex type, shall have autamatic closing shut-pff
ing the refri�serant used. No material shall be used that will �aives, and such glasses sha/X be adequately protected
' deteriorate because of ihe refrigerant, or the oil, or the against injury.
, combination of botk�. 10.6 Dial of a Preseure Gage, when the gage is permanently
, installed on the hi�h side of a refri�eratin� system, shall be i
NOTE: Mnny refrrgeranes are cozrosive to the usuas materials graduated up to approximate2y daubie the operating pressure, i
when maisture or air, or both, are present and it is assumed in but in no case less lhan 1.2 times the desi�n workzn�
''�, , approving these mmterials Lhat the system will be charged and FrBSSute. �'
� ope;oted in accordance with acoepted practice, "to prevent or
minimize this corrosion. ` 10.7 Nameplate. Each separately sold condensing unit and
, each compressor or com��ressor unit so1B for fieid assembly '!
3Q.7.3 AJuminum, Zinc, ar Magnesium sh�r11 not be used in a refrigezating system shat7 carry a namepfate marked t
in contact with methyl chloride in a refrigerating system, with the manufacturer's name, nationally registered trade-
Magnesium allays shall not be used in contacY with any mark or trade name, ider,.tificakion number, khe test pressure
halagenated refrigerant. apptied by the manufactcaer, and the refrigerant €or which it
70.2 �linimum �'est Pressures. Every refrigerant-containing is designed. The refrigerant shall be designated according
part of every system, including pressure gages and control to American Standard B79.1•1960, Numbez Designation of
mechanisms, shall be tested and prov2d tight by the manu- Refrigerants.
facturer at not less than the minimum refzi�erant leak field '
Yest gressure sgecified in Tab3e 6 except limited charged
systems. (See 10.3 and 14.1.2.j Section 11. REFRIGERAt�lT-CONTAINING �
i0.2.1 The test pressure applied to either the high or low ' PRESSURE VESSEL5
srde of each refrigerating system shal! be at least equal to
the desr�n workrn� pressure of the pressure vessels in the 11.1 Refrigerant-Con4aining Pressure Vessels Exceeding 6 ,I
� , high ar tow side of the system, respectively, or to the set- inches Snside Diameter, except those having a maximum al- I
ting of the pressure-relief_device protecting the respective lowable 3nternal or externa2 warking pressure 15 psig or
I pressure vessels, w,•hichever is lower, but not less than the less, shall comply with the rules af Section VIII of the 1962
' minimum refrigerant leak field test pressures specified in Edition of the ASME Boiler and Pressure Vessel Code (see
�i , Table 6.Any components connected to said pressure vesse/s 16.15) covering the requiremenYs for the design, fabrication,
i \d �, shalt be of sufficient strength to conform to the design re- and inspection during construction of unfired pressare
�� quirements of Faragraph 10.L1, vessels.
I 10.2.2 Limited Charged Unit Systerns sha1C be tested in 11.1.1 Certificotioo for ASME "UM" Sttimped Pressure
Ieccordar�ce with P,aragrapb 10.2 except that limited charged Vessels. Certification requirements on pressure vessels
�
� ASA 6 9.1 i 964 �� F
I �
+�vhich are 6uilt in accordance with Section VIII pf the I962 12,1,6 All pressure-relief devrces
Edition of the ASIdE Bailer and Pressure Vessel Cade under (not fusib/e plugs)
Para ra h U-1 „ „ shall be direct2y pressure-actuated. `
� p (g) and starnped with the UM symbal (see 12.].7 The size of the discharge pipe fram Lhe pressure-
Para�raphUG-Ilb)can be met ny keeping a proauction series zetief devrce shall be not less tlzan the size of the relief
record of materiai used and tasts made. Certification for device outIet, The discharge lram more than one :efieF de-
�ndividual vessels, where required, may be made by abstrac- vice may be run inta a common header, ,he area of which
�g data from the series record on Data Report Form U-3, sha11 be not less than the sum of the areas of the pi�es `
�:2. Refrigerant-Containing F':essure Yessels 3�Eat Exceed- cannected thereto. �;'
ing an Inside Diameter of 6 Inches, irrespective of pressure, �2,�,g "The length of discharge pi in
shalt he lisYed either individuatl or as P � Permitted to be in-
y part af refrigeration stalled on the outlet of a relief valve, rupture member, or
equipment, by an approved nationa!!y reco�nizecl testing fusible plug shalt be determined as follows:
Iaboratory having a follow-up inspection service. Vessels
noT sa £isted shatt be constructed according to Paragraph '�'����
11.1 and 11.1.1. (See 1.2 and 2.3.1,) C= �f 1=�
11.3 Relief Devices. All pr�ssure vessels, irrespective of T 2
size or pressure, shall be equipped wzth relief devices in °r a C":G
accordance with the requireme.�ts of Section 13 of this.Code, �� �4P:,
ll.d $tondard Hydrostatic TesYs. Fusion welded pressure
vessets sita7l be tested in accordance with Paragraph UG-99, 4+•}tere C=miciimum required disc'.har,n,c capacity, iir 11� o[ uir
Section VITI of the 1962 Edition of the ASME Hoiler and P�r min
Pressure Vessel Code. (See afso 11,4,1.} d=ztiternal diameter of pipe in in.
L=Yen;th of dischar;c pipe in ft
I1.4.I Pneumatic 7ests. Vessets far use in services
which cannot tolerate the pr�rsence of a testing liquid and �'—�`2�Y, {p, is deFined undcr Equatioa 1.)
which cannot be readily dried, and the parts of which have {See Table ? for conrputaticns derived £rom the prerrding
formuta.)
been previously testefl by hydrostatic pressure to not less
than 1�/2 times the design warkin�s pressure of the vesse.l, 12.2 Pressure-Relief Devices for Positive DispCacement
may be given a pneumatic tesY as prescribed sn Paragraph Compressors. Posifive disp7acement campressars aperating
UG-100, Section VITI of the 1952 Edition of the ASME Boiler above 15 pounds per square inch gege and having a displace- (
and,Pressure Vessel Code. ment exceeding 50 cubic feet per minute, shall be equipp�d
by themanufacturer with a pressure-retief r3evfce of adequaYe
Soction 12. RELIEF DEVlCES IN GENERAL size and pressure setting to prevent rupture of Yhe com-
pressor, Ipcated between the compressor and stop valve pn
12,1 General, Every refri�erating sys#em shat7 be protected Yhe discharge side. The discharge fram such relief device
by a pressure-relie( device unless so constructed that Qres- maq be venYed to the atmosphere or into the low pressure
sure due to fire conditions wi1l be safely relieved by some side of the system.
part af the system. 12.3 Discharge af Pressure-t2elief Dov6cas and Fusiblc�
12.1.1 Na stop valve shat/ be located between any auto- Plugs on ali systems containing mare than B pounds of
matic pressare-relief device or fasibte ptug and the part or Group 2 or Group 3 refri�erants shall be to the outside of the
parts of the system protected thereby, except when the building in an agpraved manner. Discharge of gressure-relief
parallel relief devzces mentioned in 13.2 are sa arranged devices and fuszble plu�s on all systerns containing moze
at onIy ona can be rendered inoperative at a time for test- than 100 gounds of Group l refrigerants, unless instatled 'zn
g or repair purposes. . a Machinery Room used faz no purpose pther than to house
12.1.2 All pressure-reCief devices shal( be connected as mechanical equipment and complyzng with the provisions as ��
nearly as gracticab2e directly to fhe pressure vesset or other SPecified in Paragraph 8.1I, shat! be to the outside of the
Qerts of the system protected thereby, ahove the liquid building in an approved rnanner.
refri�erant level, and installefl so that they are readily 12•3.i ,Pressure-relief devices may dischargeinto the Iow
accessible for inspection and repair and so YhaL fihey can• side of fhe system, provided the pressure-retief devices are
not be readily rendered inoperative. Fusible plvgs may be of a tyQe not appreciably affected by back pressures and
lpcated above pr below the liquid refri�erant level, provided the low side of the system is equipped with pres- I
12.1.3 The seats and discs of pressure-relief devices sure-reTief devices, The re7ief devices an the Iow side of the
shall be coastructed of suiteble material to resist refri�er- system sha11 have sufficient capacity to protect the pres- i
ant corrosion or other chemical action caused by the re- sure vessels that are relieved into the tow side of the sys-
fri�erant, Seats or discs of cast iron sha17 not be used. tem,or to protect a11 pressure vessels on the low side of the
12.1.4 The rated discharge capacity of a pressure-relief system, whichever relieving capacity is the largest, as com-
valve for a refri�erent-containing vesse2, expressed in puted by the formula in Paragraph 13.5. Such tow side pres-
pounds of air per minute, sh�21 be determined at a pressure sure-relieF devices shatl be set in accordance wiYh Para-
at the iplet of the relief valve equal ta 110 percent of the graph 13.6 and vented to the outside of the building in an
vaIve setting in accardanca with Paragraph UG•132, Sec- approve8 manner.
tion VII� of the 1962 Edition of the ASME Bozter and Pres- 12.4 Ammonia Discharge. Where ammonia is used, the dis-
sure l7essel Code. (See 16.15.) cha:ge maq be into a tank of water which shall be used for
, 12.1.5 The rated discharge capacity of a rerpiure member no purpose except ammonia absazption. At Seast 1 gal2on of
or fasible pYug discharging to atmosphere under critical flow fresh water shall be provided for each paund o£ ammonia in
conditions in pounds of air per minute shal! be determined by the system. The water used shalt be prevented from freezing
the following formu2as: wiYhaut the use af saIt ar chemica2s. The tank shatt be sub-
t�� stantially constructed of nat less than 1/8 inch or No. 11
C=0.8 P,d= U.S.
gage iron or steel. No horizontal dimension of the tank
tZ�1 I2� �J sha11 be greater than ane-half Yhe height.1'he tank sha11 have _
� hinged cover, or, if of the enclosed type, shall have a vent
' hole at the top.All pzpe connections shatt be through the top
y+•licre�_�nininzu:n reqiiired discharge capacii}', in 11a oF air of the tank on2y:The discharge gipe from the presstrre-relief .
per mir� vaT ves shall discharge the ammonia in the center of the tank
. d=itiiium�im diamezer o£bore of ftrsible�Iug nr inter- near the bbttom.
nal diametcr of inlet pipe to ruptitre member in 7Y.5 Sulphur Dioxide Discharge. Where sulphur dioxide is
incltes
used, the discharge may be into a tank of absprptive brrne
��}ierc tor ruF�trrre menabers: which sha11 be used for na purpose except sulphur dioxide
• P�_ (sct presaure X I.10)-j--14•7 absorption. There shall be 1 gallon qf standard dichrpmate
brine (2jj pounds sodium dichrqmate per gaFlon of water) for },
l�or fr�siGle pTugs: each paund of suiphur dioxide in Lhe system. .8rines made �,��
P�=aii,olutc saturatioi� pressure, correspon<ling to the
statt�ped ictnperature mclEing point of the Jusible `x'ith caustic soda or soda ash may be used in Qlace of
plug or thi,critical pressure of the re/riger¢nt used, Sodium dichromate, provided the quantity and strength give
� whichever as smaller, psia the equiva2ent sulphur dioxide absorbing pawer. 'The tank
I 12 ASA B 9.1 1964
V , - - - --------__ - ----s
� . shaCl be substantially constructed of not less than I/$ iach that the provisions of Paragraph 13.2.2, requiring a second
ar No. Ii U.S. gage iron or steei. The tank shall have a para11e1 relief device, sha71 not apply. Pressure vessels
hinged cover, or, if oi the enclnsed type, shat2 have a vent used as evaporafors, .having internal d'zameters af 6 inches
' hole at the top. All pipe connections shall be through the or less, are exempt from pressure-relief valve requirements.
top of the tani� only. The discharge pipe from the pressure- 7$,$ Required Capacity. The minimum required rated dis- ,
relief vr�lveshail discharge the sukphur dioxide in the center charge capaciLy of the pressure-zetief deuice or fu,sible ptu�
� ! of khe tank near the bottam, far a refrigerant-containirtg vessel shall be determined by
the follo,wing:
Section 13. RELIEF DEVlCES FOE2 PRESSURE
VESSEL5 .
C=fDL {3)
13.1 Generot, 2`he rules of this section are based upon the where C=minimam required discharoe capacity of the relief
rules given ii� Paragraphs UG-i25 ta UG-i34 is,ciusive, of deti>iee in lb of uir;>er min
Section VTII of Che 1962 Edition of the ASME Boiler and D=outside diameter oI the vessel in ft -
Pressure Ve:asel Code,with such additionai modifications as �—7en„ili af the vessel in ft
f=factar dependent upai� kind of refri�erant, as
are necessary for control of refrfgerants. fo3lotvs:
13.2 Pressurc Vessels Over 3 Cubic Feet. Each pressure --- '
- .. .., .......
ve�raoi ¢antainin�; liq�sid «f�i��rt�ttt wXth fncernai grosg val- F+intl aj rcjrigerant Yalue o/f
ume exceeding 3 cubir feet, except as specified in 13.4, and
which may be shul off by valves from all other parts of a Ammonia (Refrigerant 717) 0.5
refrigerating system, shat7 be protected by a pressare-refief Refrigerants 32� 22 and Sd0 1.6
device, having sufficient capacity to grevent the pzessure Refrigerant 5Q2 and
.in the pressure vessel from rising more than 10 percent Refrigerants 13, 1381, and �
, above the setting of the pressure-reIief device. {See 13.5.} 14 when on cascaded systems 2.5
13.2.1 Pressure Vessels over 3 Cubic Feet, but Less All othez reftigerants 1.� (
Thon 10 Cu6ic Feet. Under conditions specified in 13.2, a
single relief device (retief va7ve ar rupture member} may be �
, used on pres.;ure vessets having less than 10 cubic feet in-
ternal gross volume. 13.b Pressure-Relief Device Setling. Except as permitted
13.2.2 Pressure Yessels af 70 Cu6ic Feet 1nlernol Gross in 13.3.1 all pressure-relief devices sha11 be set to start to
Volume or Over. LJnder conditians specified in 13.2, a relief
device system consisting of a pressure-relief device in function at a pressure not to exceed the design warking ptes-
paraliel witk a second pressure-relief device as described in sure of the pressure vessel as determined by the manufac-
Paragraph 12.1.1 shall be provided on pressure vessels hav- turer and stamped on the pressure vessel or system.
ing intemz�l �ross vatutne of 10 cu £t or aver. Each relief �3•7 Rup#ure Member Setting. Alf nrpfure members used
valve or rupture member sha21 have sufficient capacity to in lieu of, or in series with,a relief valve shaTl function at a
prevent the pressure in the pressure vessel from rising more Pressure not tp exceed the design workin� pressure of the
than ten percent above the setting of the pressure-retief de- vesse2 and the conditions of apptication shatl conform to the
vica. (See Paragraph 13.$.) requirements of Section VIII o£the 1462 Edition of the ASME
13.2.2.1 Relief Valves Discharging in4o Low Side of �oiler and Pressure Vessel Code.
� the System. Under'conditions permitted in 12.3.1 a single Rupfure members instalTed ahead of re2ief va2ves need not
reiief v�Sve {not rupture memberj of the required reiieving be larger, but sha11 »ot be smaller, than the relief valve
capacity may be used on vessels of lp cubic feet or over. inlet. (See �'aragraph 22•1,5.}
13.8 Marking of Relief Devices.
13.2.3 Retief Aevices rn Para/le! on Large Vessels. Tn )3.8.1 All pressure-relref valves for refrigerant-containing
cases where� large pressure vessels containing lzquid re- y�sseis shaJt be set and sealed by the manvfacturer. Each
I, • fri�erent es;cept as speczfied in 13.4, require the use of two relief valve sha11 be marked by the manufacturer with the
, ar mare pressure-relief devices in para11e1 to obtain the ca- data reqixired in Paragraph UG-129 (a) qf Sectian VIIT of the
pacity required by 13.5, the battery of pressure-relief de- 1962 Edition af the ASME Boiler and Pressure Vesse2 Code.
' vices shall be considered as a unit, and therefor� as one 13.$,2 Each zupfure member for refrigerant-containing
, • pressuze-re2isf device. pressure vessels shall be marked with the information re-
13.3 Pressure Vessels with Intemal Gross Volume of 3
Cubic Feet or Less. Each pressure vessel having an inter-. Quired in Paragraph UG-129 {d) of Section VIII of the 29b2
nai grass vo2ume of 3 cubic feet or Yess, cantaining liquid Edition af the ASME $oiler and Pressure Vessel Code.
� refrigerant, except as specified in 13.4, and which may be
shut o£f by vatves from atl other parts of a refrigerafing Section 14. FIELD TESTS
system, shal! t�e protected by a pressure-retief device, or
fusible p1ug. A fusible plcrg is permitted only on the high
', side of a refrr�,erating sysfem. Pressure vessets of less
than 3 inch I D are exempY from these requizements. 14.1 General.Every refrigesant-conteining part of every sys-
13.3.1 Relief Valves on Pressure Vesseis with Gross tem that is erected on the premises, except compressors,
Volume 4{3� CUE31G Feet or Less. If a retief valve or rupiure condensers,evaporators,safeYy devices, pressure gages,and
member is used to protect a pressure vessel, the ultimate control mechanisms, that are factory tested, shalt be tested
bursting pressure of the pressare vessel so protected shalt and proved tight after complete installation, and before op-
be at teast 2'h times the pressure setting of the pressure- eration, aY not less Yhan the minimum refrigerant leak £ieid
� , relief valve or rupture member. test pressures shown in Table 6, or in accordance with
73.3.2 Fusible Plugs and Pressure Vessets with Gross 14.1.1 and 34.1.2.
Yalume of 3 Cubic �eef ar Less. If a fusible plug is used, 14.1.1 Systems erected on the ptemises using Groixg 1
the ultimate bursting pressure of the pressura vesseT so pro- refrigerant and with copper tubing not exceeding 5/8 inch
tected shati be at ieast 21/x times the refri�erant saturatian fl D, with wat2 thickness as required by Paragraphs 9.3.3
pressure, psia, corresponding to the stamped Yemgerature on and 9.3.G may be tested by means of the refri�ezant charged
' the fusible plug, qr at least 21/s times the critical pressure af into the system at the saturated vapor pressure of the re-
the refrigerant used, whichevet is smaller, frigerant at 90 F or higher.
13.4 E2elief L7evice for Pressure Vessels Used As, or As 14,1.2 Limited charged systems equipped with 4a pres•
Part of Evaporatar. Fressure vessels having 'internal diam- sure-relief device, erected on the premises, shaU be tested
,,a � eters greater than b inctxes used as,or as part o#, evaporators at a pressure not less thaa iiJx times the pressure setting
�� insulated or installed in insulated space, and which may be of the relief device.
shut off by velves fram all ather parts of a refri�erating sys- 14.2 Test Medium. No axy�en or any combustible gas or
tem sheti be protected by a prassure-reitef device in accord- cpmbustible mixture of gases shaiJ be used within�the sys-
ance with the provisions of Paragraph 13.2 and 13.3 except tem fortesting.
ASA 8 9.1 1964 �3
• d
� — — - -
r
E - -- — —
� � .7ABt.E b. Ninimum Refrigerant Lerak Field intended to apply to gas bulk storage tanks that are not
iTest Pressures permanentiy cannected to a refri�eratiorz system,
__. ,. , .._. t
• Minimum field Section 15. INSTRUCTIONS
refrigeran t '
leak test pres- �5.i Signs. Each refrrgerating system erecied an the prem-
. sures,psr� ises shall be provided with an easily legible permanent sign
Chemical Hi�h Low securely attached and easiiy accessible, indxcating l�iereon
Refrigerant name and number* formuta srde side the name arid address of the instalier, the kind arid total
number of pounds of refrigerant required in the system for
Ammania {717j , NH3 300 I50 riormal operatians, and the refrigerant Ieak field test pres-
Butane {600) CaH}Q g5 SQ sure applied,
Carbon dioxide (744) CQ2 1500 1000 ' 1.5.2 Metal $igns for $ystems Containing More thon 100
Dichlprodifluoromethane {22} CCI2F1 235 140 Pourtds of 12e{rigeranf. Systems containing more than 100
Dichlorodiflixoromethan� 73,8%o CC12F2 pounfls of refri�sererrt shall be grovided with metal signs hav-
Ethylidene fluoride 26,2�j6�t5��} CH3 CHF�� 285 �S� ing letters not less than '/� inch in height designating the
Dichloroethylene (1130) CzHzCl� 3d 30 main shutoff valves to each vesse2, main sfeam or electricaF
Dichloromethane (Methylene control, remote control swiich, and pressure-limitin� devrce.
chloride) (30) CHzC12 30 30 On all exposed highpressureand low pressure piping in each
I}ichtpromanafluozomethane (21} CEiC22F '7p qp zoam where installed outside the machinery room, shat! be
DichloroteYrafluorozthane {X14) CzC1zF4 5q 50 signs, as specified above, with the name af the refri�erant
Ethane (170), CzHb 1200 700 �nd the letters "HP" of"LP,"
Ethy1 chluride (160} C�Hs CI 60 gp 15.3 New 5i�n for Chonged Refrigerant. V.'hen the kind of
Ethylene (1150) C2Hd 1640 1200 refrigerant is changed as provided in 15.7 (Substitution of
Isobutane (6p1) (CH;)3CH 130 '7p �efrigerant}, thera shatt be a new sign, of the same type as
Methyi chToride {40} CH3C1 21d �2(} specified in IS.2, indicating ciearly Yhat a substitution has
Methyl formate (611) HCOOCHJ 50 gp �een made, and stating the same informatipn for the new re-
MonobromatrifIupromethane (13B1) CBrF3 435 245 frigerant as was stated in the originai.
Monachioradifluoromethar<e (22} C�-T�fp'2 3pg 15p 1,5,4 Charginq and l�ischarging Refrigerants. Wlaen refrigerant
Monochloroditluaromethane 48.8%,� CHC1F2 is aflded Eo a system, except a unrt system requiring less
end Monochlorapentafluoroethane � 300 15d than 6 paunds of refri�serant it shalt be charged irtto the Iow
51.2% {502) CC1FzCF3 pressure side of the system. Any point on the downstream
Monochlorotr3.fluaromethane (13) CC1F3 6$5**6$5** $ide of themain liquid linestop valve shall be cortsidered as
4ctaf2uaracyclobutene (C33� CaFe Z3p �p part af Yhe law pressnre side u�h�z� operating with said stop
PrapnnQ (299} ��Fis �QO 1�a9 +'f�lv� in the �lps�d pasikien. Nc� �c�rviea �an�ainar sh�l1 b�
Suiphur d'zoxide (764) SUr 170 g$ left connected to a system except while charging or with-
Trichforomonafluoromefhane {11} CCl�F 2p 2p drawing refrigeranf.
Trichlorotrifluoroethane {113) CzC13F} 20 z0 15.5 Refrigerants Withdrawn from Refrigeroting $ys4ems
shalt be transferred ta approved contazners only. (See 16,2.7
Na refri�erant sha1J be discharged to a sewer.
15.6 Canfoiners Used for Refrigerants Withdrawn from d
I '��T�s� ReErigerqfiing System shsXl be carefully wei�hed each time � �
g} For refrigerants not listed ia Table 6 the test gressure they are used"For this purpose, and the containers shall not
� for the high pressure side shall be not less than the }�e filletl in excess of the permissible filling weight for such
saturated vapor p;essure of Yhe refrigerant at 150 F. T"he contarners and such refrigerants as are prescribed in the per='
test pressure for the low pressure side shall be not less tinent re�ulations of the Interstaie Commerce Commission.
'than the saturated vapor pressure pf the refri�erant at (See 16.2.)
li4F. However, the test pressure for either ihe hrgh or �5.7 Subsfiitution of Kind of F2efrigerant 'xn a system shall
, low side need not exceed 125 percent oF the critical not be made without the ermission of Yhe a
I pressure of the refri�erant. In na case shail the #est p pproving author-
� • pressure be less than 30 psig. ity, the user, and the makers of the original equipment, and
b) When a compressor is used as a booster to obtain a low due abservance of safety requisements, including:
pressure and discharges inta the suctian line of anather a} T(ze effects of the substituted refrigerant on materia2s irA
system, the booster compressor is considered e part o; �ye system; '
the low side, and values fisted under the low side column
in 'I'able 5sha11 be used for hoth high and 1ow side o£ the �� T�e possibility of overloading the Yiquzd receiver which
boaster compressor pro��ided that a low pressure stage should not be more than 80 percent ful2•of liquid;
I compressor of the positiva displacement type shatl have c) The liabi2ity of ekceeding motor horsepower,design wark-
a pressure-relref valve. in�pressure, or any other element that would violate any
c) In field testing systems using nonpositive displacement of the provisions of this Code;,
. compressors, the entire system sha11 be considered for
field test purposes as the Tow side pressure. �) Tfxe proper size of reftigerant controls;
* ASHRAE Des'sgnation e) The effect on the operation and setting o{safety devices;
*'� Critical pressure is 56k psia at critical ternp of 83.,9 F
(See Nate (a} abave). fl "�"he possible hazards created by mixture pf the priginat
and fhe substituted retrigerant;
. 1d.2.T The means use<i to build up the test pressure g} Effect of the classification of the refrigerant as provided
sha17 have either a pressure-timitin� BEVSC@ ar a,pressure in this standard.
reducing device and a gage on the outlet side. •
id.3 Posting of Tests. A dated declaration o£ test should 1S.$ (2efrigerant Sto�ed in a Machinery Room shatl be not I
i be provided forall systems containing SQIb or more of refrig- more than 24 percent af the nocmal refrigerant charged nor i
erant, where ,required by E4.1. The declaration should be more than.300 pounds of the re.frigerant, in addition to the
moixnted in a frame, protected by glass, and posted in the charge in Yhe system and the refrigerant stored in a perma-
machinery room and shoutd give the name of the refri�erant nently attached receiver, and then onlp in approved storage I
and the field refrigerant leak test pressures applied to the Gontainers. (See 16.2.) '
iigh side and the to�v side of the system. Ttae declaration of 15.4 Mosks or F3elmets. One mask or helmet shatt be pro- I
.est should be signed by th� ir�sta2ier aad, if ar� inspectar is vided at a location convenient ta the machinery room when
present ak the te_sts, he s�hould alsa sign the declaratian. an amount af a Group 2 refrigerant between lOp and 1000 �1
When requested,copies of.itis declaration shal2 be £nrnished pounds, incluszve, is employed. If more than I400 povnds of
to the enfarcing authority a Group 2 refri�erant are empioyed, at leasY two masks or
The leak test pressure reqixirements of Table 6 are not heimets shall be provided.
� •
I �� , ASA 8 9.1 14fiA
r
� . 15.9.7 Only complete helmets or masks marked as ap- RELIEF DEYICE SET f1T I50 PSIA (P,)
proved by the Bureau of i,'fines of the United States Depart- 50 -�.9 9.9 17.9 3�.7 52.3 97.5 ISl.8 2fi2.8
ment of the Interior ;�nd suitable for the refri�erant employed i� 4.0 8.1 14.6 292 ��2.9 79.5' 125.4 214.a
' __ shall be used ar:d they shall be kept in a suitable cabinet 100 3.� 6.9 12.7 2�2 36.9 (8.9 . lOR.O 185.4
immediately outside the machinery room or other approved 1�0 2.8 5.7 10.4 20.6 30.0 76.1 �, 87.fi 151.8
accessible location. 200 2.4 4.9 8.9 17.8 26.? �F8,7 ' i5.9 131.4
��(' 3Qn 1.9 �A 7.4 l t.6 21.1 39.7 63.0 1071
L�. . 15.9.2 Canisters or cartridges of helmets or masks shall RELIEF DEYICF, ST;T AT 200 PSIA (P,J
be renewed i:r,media.ely after having been used or the seal SO 6.5 132 23.8 �17.6 69.i 130.0 202.4 3�0.�
broken and, if unused, the canisters shall be rene«�ed not 7j 5.3 10.8 19.4 38.9 572 106.0 1672 286.0
later than the date no;ed on the canister Iabels. 100 4.6 92 16.9 33.6 �92 91.8 144.0 247.2
li0 3.8 7.6 13.8 27.4 =10A 7<�.R 11C.8 202.4
15.10 fJ�aintenonce. All refri�eratin� systems shall be main- 200 32 6.5 11.8 23.8 31.9 (4.9 1012 . 1752
tained by the user in a clean condition, free from accumula- 300 2.6 5.3 9.8 19.4 28.4• 5'.'..9 8�.0 142.8
tions of oily dirt, waste, and other debris, and shall be kept j�ELIEF DF,YjCF, SF,T AT 2�0 PSIA (P,)
readily accessible at all times.
50 8.1 16.� 29.8 59.i 87.1 162.5 253.0 437.0
15.11 Responsibility as to Operation of the System. It sha11 �y 6.i 13.5 24.3 48.6 71.5 132.5 209.0 357.�
100 5.8 11.G 21.2 42.0 61.6 114.8 180.0 309.0
be the duty of the person in charge of the premises on which 150 4.7 9.� 17.3 3<1.3 50.0 93.5 1�16.0 253.0
a retrigeratin� system containing more than 50 pounds of re- 200 4.1 8:L 14.8 29.7 43.7 81.2 126.5 219.0 i
fri�erant is installed, to place a card conspicuously as near 300 3.3 6.7 12.3 29.3 35.5 662 105.0 178.5
as practicable to the refri�erant compressor giving directions ; RF,LIIs'F DEYICF SET C1T 300 PSIA (P,)
for the operation of the system, including precautions to be F
observed in case of a breakdown or leak as follows: 50 9.7 19.8 35.7 71.4 10�.5 19:i.0 303.6 525.6
7� i.9 162 29.1 �8.3 85.8 159.0 2�0.8 429.0 �
' a) Instruction for shutting down the system in case of emer- 100 C.9 13.9 2�.4 50.4 73.9 137.7 216.0 370.8
gency; 1�0 �.6 11.3 20.7 41.1 60.0 1122 1752 303.6
b) The name, <�ddress, and da and ni ht tele hone numbers 200 4.9 9.8 17.8 35.6 52.4 97.4 151.8, 262.8 �
for obtainin�; service;
Y g . P 300 3.9 7.9 14.? 29.1 42.6 79.4 126.0 2142
c) The name, s�ddress, and telephone number of the munici- .
pal inspeckion department having jurisdiction, and in- ,
structions to notify said department immediately in case SECTION 16
of emergency.
• Titles ond Sources of Reference Standards
15.12 Pressure Gages should be checked for accuracy prior
to test and immediately after every occasion of unusually
high pressure, equal to full scale reading eithez by compari- 16.1 American Standard, Z11.7-1962, Method of Test for
son with master gages or by,setting the pointer as deter- Flash Point by Means of the Pensky-Martens Closed
mined by a dead weight pressure gage tester. Tester. (ASTM D93-62) (1) (4)
16.2 Interstate Commerce Commission's Regulations for
� TABLE 7. Length of Discharge Piping for Relief Valves Transportation of Explosive and other Dangerous Ar-
or Rupture Members of Various Discharge Capocities ticles by Land and Water in Rail Freight Service and ,
- by Motor Vehicle (Highway) and Water, Including
Specifications for Shipping Containers; Agent T.C.
Tqttir. George's Tariff No. 15, Effective Sept. 25, 1963 pre-
Zength of Discharge capacity in Ib o/air per min (�J scribed under the Act of June 25, 1948. (5)
• discharge Standard wall iron pipe sizes, in.
I�tPe'�t 16.3 American Standard, B15.1-1958, Safet Code for
(L) I/2 �/,y 1 1�/ 11/ 2 2�/z 3 Mechanical Power-Transmission Apparatus. (1)
. R�I,IZ;F DGI�ICE SF,T AT 25 PSIA (P,) 16.4 American Standard, A40.8-1955, National Plumbing
50 0.31 I.( 2.9 59 8.7 16.3 25.3 43.8 Code. (1) ,
i� 0.67 1!6 2.4 4.9 72 13.3 20.9 35.8 �
100 0.5R 1.`? 2.1 42 62 11.5 18.0 30.9 �6.5 American Standard, All.l-1952, for Industrial Light-
ISO 0.47 0��5 1.7 3.4 5.0 9.4 I4.( 25.3 ing. (1)
200 0.41 0.£t 1.5 2.9 4.4 8.1 12.6 21.8 '
300 0.33 0.(i7 12 2.4 3.6 6.6 10.5 17.9 16.6 Nationai Fire Protection Association Standard 70, •
National •Electrical Code, American Standard Cl-
RF,7,/FsF DF;VICF, SF,T AT 50 PSIA (P,) 1962. (i) (6)
50 1.6 3.3 ;i9 11.9 1i.4 32.5 50.6 87.6 '
75 1.3 2.7 . ��.9 9.7 14.3 2fi.5 �1.8 i1.5 i 6.7 National Fire Protection Association Standard 54- �
100 12 2.3 4.`l R:6 i2.3 23.0 36A fil.i 19�9 Installation of Gas Appliances and Gas Piping, �
1�0 0.9<t 1.9 3.5 (.9 10.0 18.7 29.2 �0.6 American Standard Z21.30-1959 (1) (6) '
200 0.81 1.6 2.9 5.9 8.7 16.3 25.3 43.7
300 0.G6 1.3 2.5 9.9 7.1 13.3 21.0 3�.7 .16.8 National Fire Protection Association Standard 90A, �
RELl�t% I)F,VICE SET AT 75 PSIA (P,) 1963 Air Conditioning and Ventilating Systems of
Other Than Residence Type. (6)
5.0 2.�b 4.9 8.9 17.9 261 dR.7 7�.9 7'3I.�
75 2.0 -1,7 ?.3 11.6 21.� 39.8 62.6 lOZO 16.9 ATational Fire Protection Association Standard 90B,
100 1.7 3.5 6.h 12.6 18.5 34.4 54.0 9?.6' 1963 Residence Type Warm Air Heating and Air
150 1.4 2.8 52 10.3 15.0 28.0 43.8 �5.9 Conditioning Systems. (6)
�200 12 2.5 4.4 8.9 13.1 24.4 37.9 65.6
300 0.9 2.0 3.7 7.3 10.i 19.i 31.5 53.5 �6.10 American Standard, B31.5-1962, Code for Pressure I
� XF.LIF.F DF:VICF, SET AT 100 PSIA (P,) Piping: Refrigerant Piping. (1)
50 3? 6.( 1'..9 23.R 3�1.8 6�.0 1012 17y.2 i 6.]1 American Standard, B36.10-1959, Wrought-Steel and �
. 7� 2.7 i.<1� 9.7 19.4 28.6 53.0 83.6 1•�3.0 Wrought-Iron Pipe. (1) '
100 2.3 4.6 S.:i 16.8 24.6 45.9 12.0 123.6
p'"`„ � 150 1.9 3.8 fi.9 13.7 20.0 37.4 58.4 1012 �6.12 American Standard, H26.1-1963, S ecifications' for
P
t� r' 200 1.6 3.3 �.9 11.9 17.5 , 32.5 �0.6 87.6 Seamless Co er Pi e Standard Sizcs. (ASTM
300 1.3 ?.7 4.9 9.7 142 26.5 . �52.0 71.-1 g42_62} (1) (4) P � ,
I ASA 6'9.1 1964 15 '
• _ 1:
�
� 76.13 American Standard, I-i23.1-1963, Specifications for 16.i6 For reference to items not found in the body of the
+ Seamless Co er Water Tube. ASTM B88-62) (1) (4) Code,the ASHRAE GUIDE AND DATA BOOKS, cur-
PP �
rent ediiions are recommended. (2)
16�14 American S�andard, H23.5-1963, Specifications fcr
-- Seamless Copper Tube for Refrigeration Field Ser- �6.17 National Fire Protection Association Standard 101-
vice. (ASTM B280-62) (i) (4) 1963, Building Exits Code for Life Safety from Fire.
,15 ASME Boiler and Pressure Vessel Code, Section VIII �6} ��,
1962 Edition, known as ASME Unfired Pressure �6.18 American Standard, H27.1-1963, Specification for
-- Seamless Red Brass Pipe, Standard Sizes. (ASTNf
Vessel Code. (3) 843-62) (1} (4) ,
16.i9 American $tandard, B79.1-1960, Number Designation
of Refrigerants. (ASHRAE 34-57) (1) (2)
' Reference$ources
(1) American Standards Association Inc., 10 East 40;h (4) American Society for Testing and D4aterials, 1916 Race
Street, New York, N.Y., 10016 Street, Philadelphia 3, Pa. .
(2) American Society of Heating, Refrigerating and Air- (5) Interstate Commerce Commissian, 12th Street and Con-
ConditioningEngineers,Inc.,United Engineering Center, stitution Avenue, Washington, D.C. �
345 East 47th Street, New York, N.Y., 10017 (6) National Fire Protection Association, 60 Batterymarch
(3) American Society of Mechanical Engineers, United En- Street, Boston 10, h7ass. 1
,gineering Center, 345 East 47th Street, New York, N.Y.,
10017 �
• . .,,.,
• APPENDIX ,
Extract from ASA B 79. 1-1960 Number Designation of Refrigerants
ASHRAE ASHRAE
$tandurd $tanclurd
Refrigernnt Chemical Refrigeran Chemical
Designution Chr,rnical Name Formula Designatio� Chemical Name- Formula
Halocurbon Compounds Azeotropes
10 Carhontetrachloride CCI� S00 Refri�erantsl2/152ai3.8/262wt%1'CC1nFz/CFisCAFs
11 Tricl�loromonofluoromethane CC1,F 501 Refrigcrants 22/12 i5/25 wt% CHC1Fa/CC1,F,
12 UichiorodiAuoromethane CCI:;I': 502 Refrigerants 22/115 48.8/51.2 wt% CHCIF,/CC1FaCF,
13 `4onoclilorotri(tuoroa�ethane CC1Fa ' �.
13B1 �'Ionobromou•ifluoromethane CBrFa bliscellaneous Organic Compounds
1�1 CarLontetra(luoride CFs Hydrocarbons •
20 Cf�Ioroform CHCi, SO ifethane CH. �
21 Dichioromonofluoromethane CHCI:k' � 170 i'.thane Cfi:CHa ' �
22 :1'Ionocliloroilifluoromethane CHC1F, _ 290 Propane CH,CHzCHa
•23 Trzflaoromethane CHF, 600 Butane CH,CHZCFiaCH� • ,
30 \�ethylcne Chioride CH:CI, GOi Isobutane CA(CH,)a
31 �Ionoehloromonofiiaoromethane CH:C1F (1150 Etnylene CHa—CH,
32 \icthylene fluoride Cx=�� (1270 Propytene CH,CH—CHa ;
.90 �'Icthyl chlorido CH,CI
41 �Icthyl ftuoride CH3F Qxygen Conapounds �
50 A7edinaa Cx' 610 Ethyl ether C�I�OCzH6 -
110 Ilcsachloroethane CC1,CC1, 611 AZetiiyl fornaate HCOOCH,
111 P�ntachloromono(l�aorcethane CCL,CCI;F' '
112 T��trachlorodifluorocthane CCI�FCCIzF Sulfur Compounds I
112a Tctracl�loroilifiuorocthane CCI,CCIFz 620
113 2�ricl�lorotrifliioroethane CC1xFCC1F, � �
113a '3l•i�•.lilorotrifluoroethane CC1,CFa
114 1)ichlorotetrufluorocthane CCIF,CC1Fs Nitro�en Compourzds
11<la llic6lorotetrai'luorouthane CCI.FCF, 630 Methyl amine CHaNHv i
119B2 llibromotetr.ifluorortl�ane CBrF•,CBrF: 631 Ethyl amine CsHalVHs
� 115 �9unochloropentafli�oroethane CCIF,CFa .
116 3ie�afliwroethane CF,CF, Inorganic Compoureds
120 �'cntacLloroetiimie CHC1zCC1, 717 Ammonia NHa
• 123 Dichlorotri(luoroetlia�e CHCI�CF3 718 �Dater Ha0
124 �lunochlorotetrafluoroechane. CHCIFCF, 729 Air
129� ivionochlorotetraflu«�roethane C�IF:CC1Fz 744 Carbon dioxide C�=
' 1`l5 YcntaAuoroethane CHF,CF, � 744A Nitrous oside Na0
133a ]Fonochlorotrifiuorrthane CH:CICF3 764 Sulfur dioxide S0:
140a i richloroethnne CH,CCI, '
142b \4onodilorodi(luorocthane CH,CCIF� Unsaturated Organic Compounds
143a 'I'rillitoroct}iane �H,CF� ll2a DicLlorodifluoroethylene CCl,-=_CF_
150a Dicl�lorocthane �HaCHCIs ' 1113 b4onochlorotrifiuoroethyle»e CCIF=CFs �
152a llifluoroethane ��3CHFz " , 1114 Tetrafluoroethylene CFr-CFs
' 1C0 EtLyl chtoride CH,CH,CI 1120 Trichloroethylene C�ICI=CC1,
1 i0 Ethane CH,CH, 1130 Dichloroethylene CACI=CHC1
218 C►ctaffuoropropane CF,CF,CF3 1132a Vinylidene fluoride CH,eC�z
�JO Propane CH,CH,CH� 1140 Vinyi c}iloride CA3—CHCI �,
1141 Vinyl fluoride CHa-=CHF , .
Cyclic O�ganic Co�npacutds 1150 Ethylene CHa=-CI�,
C316 Dichlorohesafluorocyclobutane C.CI,Fa 1270 Propylene CEisCFI�CH�
C31' ➢4onoclilorohcptaf�aorocyclobutane C�C1Fz
C318 Octafiuorocyciobutnne C.Fe
, • • i
]6 ASA 8 9.1 1964
.