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Chapter 11 — REFRIGERATION

1126.0 Drift Eliminators.1126.1 General. Cooling towers, evaporative condensers,

California Mechanical Code (Title 24, Part 4) · 2019 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

and fluid coolers shall be equipped with drift eliminators that have a drift rate of not more than 0.005 percent of the circulated water flow rate in accordance with the equipment manufacturer’s instructions.

2019 CALIFORNIA MECHANICAL CODE 227

REFRIGERATION any other purpose or distributed to any other persons or parti es.

TABLE 1102.3 REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8

ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE

[ASHRAE 34: TABLE 4-1, TABLE 4-2]
REFRIGERANT
 CHEMICAL FORMULA
 CHEMICAL NAME1
(COMPOSITION FOR BLENDS)
 SAFETY
GROUP7
 OEL2
(ppm)
 POUNDS PER 1000
CUBIC FEET OF SPACE
R-11
 CCl3F
 Trichlorofluoromethane
 A1
 C1000
 0.39
R-12
 CCl2F2
 Dichlorodifluoromethane
 A1
 1000
 5.6
R-12B1
 CBrClF2
 Bromochlorodifluoromethane
 ––
 ––
 ––
R-13
 CClF3
 Chlorotrifluoromethane
 A1
 1000
 ––
R-13B1
 CBrF3
 Bromotrifluoromethane
 A1
 1000
 ––
R-14
 CF4
 Tetrafluoromethane (carbon tetrafluoride)
 A1
 1000
 25
R-21
 CHCl2F
Dichlorofluoromethane
 B1
 ––
 ––
R-22
 CHClF2
 Chlorodifluoromethane
 A1
 1000
 13
R-23
 CHF3
 Trifluoromethane
 A1
 1000
 7.3
R-30
 CH2Cl2
 Dichloromethane (methylene chloride)
 B1
 ––
 ––
R-31
 CH2ClF
Chlorofluoromethane
 ––
 ––
 ––
R-32
 CH2F2
 Difluoromethane (methylene fluoride)
 A2L
 1000
 4.8
R-40
 CH3Cl
Chloromethane (methyl chloride)
 B2
 ––
 ––
R-41
 CH3F
Fluoromethane (methyl fluoride)
 ––
 ––
 ––
R-50
 CH4
Methane
 A3
 1000
 ––
R-113
 CCl2FCClF2
 1, 1, 2-trichloro-1, 2, 2 – trifluoroethane
 A1
 1000
 1.2
R-114
 CClF2CClF2
1, 2-dichloro-1, 1, 2, 2 tetrafluoroethane
 A1
 1000
 8.7
R-115
 CClF2CF3
Chloropentafluoroethane
 A1
 1000
 47
R-116
 CF3CF3
 Hexafluoroethane
 A1
 1000
 34
R-123
 CHCl2CF3
 2, 2-dichloro-1, 1, 1, - trifluoroethane
 B1
 50
 3.5
R-124
 CHClFCF3
2-chloro-1, 1, 1, 2 - tetrafluoroethane
 A1
 1000
 3.5
R-125
 CHF2CF3
Pentafluoroethane
 A1
 1000
 23
R-134a
 CH2FCF3
 1, 1, 1, 2-tetrafluoroethane
 A1
 1000
 13
R-141b
 CH3CCl2F
1, 1-dichloro-1-fluoroethane
 ––
 500
 0.78
R-142b
 CH3CClF2
1-chloro-1, 1-difluoroethane
 A2
 1000
 5.1
R-143a
 CH3CF3
1, 1, 1-trifluoroethane
 A2L
 1000
 4.5
R-152a
 CH3CHF2
1, 1-difluoroethane
 A2
 1000
 2.0
R-170
 CH3CH3
Ethane
 A3
 1000
 0.54
R-E170
 CH3OCH3
 Methoxymethane (Dimethyl ether)
 A3
 1000
 1.0
R-218
 CF3CF2CF3
Octafluoropropane
 A1
 1000
 43
R-227ea
 CF3CHFCF3
 1, 1, 1, 2, 3, 3, 3- heptafluoropropane
 A1
 1000
 36
R-236fa
 CF3CH2CF3
1, 1, 1, 3, 3, 3-hexafluoropropane
 A1
 1000
 21
R-245fa
 CHF2CH2CF3
1, 1, 1, 3, 3-pentafluoropropane
 B1
 300
 12
R-290
 CH3CH2CH3
Propane
 A3
 1000
 0.56
R-C318
 -(CF2)4-
 Octafluorocyclobutane
 A1
 1000
 41










228 2019 CALIFORNIA MECHANICAL CODE

REFRIGERATION

TABLE 1102.3 (continued) REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8

ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE

[ASHRAE 34: TABLE 4-1, TABLE 4-2]
REFRIGERANT
 CHEMICAL FORMULA
 CHEMICAL NAME1
(COMPOSITION FOR BLENDS)
 SAFETY
GROUP7
 OEL2
(ppm)
 POUNDS PER 1000
CUBIC FEET OF SPACE
R-402B
 zeotrope
 R-125/290/22 (38.0/2.0/60.0)
 A1
 1000
 15
R-403A
 zeotrope
R-290/22/218 (5.0/75.0/20.0)
 A2
 1000
 7.6
R-403B
 zeotrope
R-290/22/218 (5.0/56.0/39.0)
 A1
 1000
 18
R-404A
 zeotrope
R-125/143a/134a (44.0/52.0/4.0)
 A1
 1000
 31
R-405A
 zeotrope
R-22/152a/142b/C318 (45.0/7.0/5.5/42.5)
 ––
 1000
 16
R-406A
 zeotrope
R-22/600a/142b (55.0/4.0/41.0)
 A2
 1000
 4.7
R-407A
 zeotrope
R-32/125/134a (20.0/40.0/40.0)
 A1
 1000
 19
R-407B
 zeotrope
R-32/125/134a (10.0/70.0/20.0)
 A1
 1000
 21
R-407C
 zeotrope
R-32/125/134a (23.0/25.0/52.0)
 A1
 1000
 18
R-407D
 zeotrope
R-32/125/134a (15.0/15.0/70.0)
 A1
 1000
 16
R-407E
 zeotrope
R-32/125/134a (25.0/15.0/60.0)
 A1
 1000
 17
R-407F
 zeotrope
R-32/125/134a (30.0/30.0/40.0)
 A1
 1000
 20
R-407G
 zeotrope
R-32/125/134a (2.5/2.5/95.0)
 A1
 1000
 13
R-408A
 zeotrope
R-125/143a/22 (7.0/46.0/47.0)
 A1
 1000
 21
R-409A
 zeotrope
R-22/124/142b (60.0/25.0/15.0)
 A1
 1000
 7.1
R-409B
 zeotrope
R-22/124/142b (65.0/25.0/10.0)
 A1
 1000
 7.3
R-410A
 zeotrope
R-32/125 (50.0/50.0)
 A1
 1000
 26
R-410B
 zeotrope
R-32/125 (45.0/55.0)
 A1
 ––
 27
R-411A6
 zeotrope
R-1270/22/152a (1.5/87.5/11.0)
 A2
 990
 2.9
6

R-412A
 zeotrope
R-22/218/142b (70.0/5.0/25.0)
 A2
 1000
 5.1
R-413A
 zeotrope
R-218/134a/600a (9.0/88.0/3.0)
 A2
 1000
 5.8
R-414A
 zeotrope
R-22/124/600a/142b (51.0/28.5/4.0/16.5)
 A1
 1000
 6.4
R-414B
 zeotrope
R-22/124/600a/142b (50.0/39.0/1.5/9.5)
 A1
 1000
 6.0
R-415A
 zeotrope
R-22/152a (82.0/18.0)
 A2
 1000
 2.9
R-415B
 zeotrope
R-22/152a (25.0/75.0)
 A2
 1000
 2.1
R-416A6
 zeotrope
R-134a/124/600 (59.0/39.5/1.5)
 A1
 1000
 3.9
R-417A6
 zeotrope
R-125/134a/600 (46.6/50.0/3.4)
 A1
 1000
 3.5
R-417B
 zeotrope
R-125/134a/600 (79.0/18.3/2.7)
 A1
 1000
 4.3
R-417C
 zeotrope
R-125/134a/600 (19.5/78.8/1.7)
 A1
 1000
 5.4
R-418A
 zeotrope
R-290/22/152a (1.5/96.0/2.5)
 A2
 1000
 4.8
R-419A
 zeotrope
R-125/134a/E170 (77.0/19.0/4.0)
 A2
 1000
 4.2
R-419B
 zeotrope
R-125/134a/E170 (48.5/48.0/3.5)
 A2
 1000
 4.6
R-420A
 zeotrope
R-134a/142b (88.0/12.0)
 A1
 1000
 12
R-421A
 zeotrope
R-125/134a (58.0/42.0)
 A1
 1000
 17













2019 CALIFORNIA MECHANICAL CODE 229

REFRIGERATION any other purpose or distributed to any other persons or parti es.

TABLE 1102.3 (continued) REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8

ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE

[ASHRAE 34: TABLE 4-1, TABLE 4-2]
REFRIGERANT
 CHEMICAL FORMULA
 CHEMICAL NAME1
(COMPOSITION FOR BLENDS)

 SAFETY
GROUP7
 OEL2
(ppm)
 POUNDS PER 1000
CUBIC FEET OF SPACE
R-424A6
 zeotrope
 R-125/134a/600a/600/601a
(50.5/47.0/0.9/1.0/0.6)
 A1
 970
 6.2
R-425A
 zeotrope
 R-32/134a/227ea (18.5/69.5/12.0)
 A1
 1000
 16
R-426A6
 zeotrope
 R-125/134a/600/601a (5.1/93.0/1.3/0.6)
 A1
 990
 5.2

R428A
 zeotrope
R-125/143a/290/600a (77.5/20.0/0.6/1.9)
 A1
 1000
 23
R-429A
 zeotrope
R-E170/152a/600a (60.0/10.0/30.0)
 A3
 1000
 0.81
R-430A
 zeotrope
R-152a/600a (76.0/24.0)
 A3
 1000
 1.3
R-431A
 zeotrope
R-290/152a (71.0/29.0)
 A3
 1000
 0.69
R-432A
 zeotrope
R-1270/E170 (80.0/20.0)
 A3
 700
 0.13
R-433A
 zeotrope
R-1270/290 (30.0/70.0)
 A3
 880
 0.34
R-433B
 zeotrope
R-1270/290 (5.0/95.0)
 A3
 950
 0.51
R-433C
 zeotrope
R-1270/290 (25.0/75.0)
 A3
 790
 0.41
R-434A
 zeotrope
R-125/143a/134a/600a (63.2/18.0/16.0/2.8)
 A1
 1000
 20
R-435A
 zeotrope
R-E170/152a (80.0/20.0)
 A3
 1000
 1.1
R-436A
 zeotrope
R-290/600a (56.0/44.0)
 A3
 1000
 0.50
R-436B
 zeotrope
R-290/600a (52.0/48.0)
 A3
 1000
 0.51


R-438A
 zeotrope
R-32/125/134a/600/601a
(8.5/45.0/44.2/1.7/0.6)
 A1
 990
 4.9
R-439A
 zeotrope
 R-32/125/600a (50.0/47.0/3.0)
 A2
 990
 4.7
R-440A
 zeotrope
R-290/134a/152a (0.6/1.6/97.8)
 A2
 1000
 1.9
R-441A
 zeotrope
R-170/290/600a/600 (3.1/54.8/6.0/36.1)
 A3
 1000
 0.39
R-442A
 zeotrope
R-32/125/134a/152a/227ea
(31.0/31.0/30.0/3.0/5.0)
 A1
 1000
 21

R-444A
 zeotrope
R-32/152a/1234ze(E) (12.0/5.0/83.0)
 A2L
 850
 5.1
R-444B
 zeotrope
R-32/152a/1234ze(E) (41.5/10.0/48.5)
 A2L
 890
 4.3
R-445A
 zeotrope
R-744/134a/1234ze (E) (6.0/9.0/85.0)
 A2L
 930
 4.2
R-446A
 zeotrope
R-32/1234ze(E)/600 (68.0/29.0/3.0)
 A2L
 960
 2.5
R-447A
 zeotrope
R-32/125/1234ze(E) (68.0/3.5/28.5)
 A2L
 900
 2.6
R-447B
 zeotrope
R-32/125/1234ze(E) (68.0/8.0/24.0)
 A2L
 970
 23
R-448A
 zeotrope
R-32/125/1234yf/134a/1234ze(E)
(26.0/26.0/20.0/21.0/7.0)
 A1
 890
 24
R-449A
 zeotrope
 R-32 /125 /1234yf /134a
(24.3/24.7/25.3/25.7)
 A1
 830
 23
R-449B
 zeotrope
 R-32/125/1234yf/134a
(25.2/24.3/23.2/27.3)
 A1
 850
 23
R-449C
 zeotrope
 R-32/125/1234yf/134a
(20.0/20.0/31.0/29.0)
 A1
 800
 23
R-450A
 zeotrope
 R-134a/1234ze(E) (42.0/58.0)
 A1
 880
 20
R-451A
 zeotrope
R-1234yf/134a (89.8/10.2)
 A2L
 520
 5.3


R-452A zeotrope
R-32/125/1234yf (11.0/59.0/30.0)		 A1 780 27

230 2019 CALIFORNIA MECHANICAL CODE

REFRIGERATION

TABLE 1102.3 (continued) REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8

ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE

ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE

ASHRAE ASHRAE ASHRAE

[ASHRAE 34: TABLE 4-1, TABLE 4-2]
REFRIGERANT

 CHEMICAL FORMULA

 CHEMICAL NAME1
(COMPOSITION FOR BLENDS)

 SAFETY
GROUP7

 OEL2
(ppm)

 POUNDS PER 1000
CUBIC FEET OF SPACE




R-453A
 zeotrope
R-32/125/134a/227ea/600/601a
(20.0/20.0/53.8/5.0/0.6/0.6)
 A1
 1000
 7.8















R-458A
 zeotrope
R-32/125/134a/227ea/236fa
(20.5/4.0/61.4/13.5/0.6)
 A1
 1000
 18
3
3
4
3

R-503
 azeotrope3
R-23/13 (40.1/59.9)
 ––
 1000
 ––
R-504
 azeotrope3
R-32/115 (48.2/51.8)
 ––
 1000
 28
R-505
 azeotrope3
R-12/31 (78.0/22.0)4
 ––
 ––
 ––
R-506
 azeotrope3
R-31/114 (55.1/44.9)
 ––
 ––
 ––
R-507A5
 azeotrope3
R-125/143a (50.0/50.0)
 A1
 1000
 32
R-508A5
 azeotrope3
R-23/116 (39.0/61.0)
 A1
 1000
 14
R-508B
 azeotrope3
R-23/116 (46.0/54.0)
 A1
 1000
 13
R-509A5
 azeotrope3
R-22/218 (44.0/56.0)
 A1
 1000
 24
3

3

3

3

3

3

3

R-600
 CH3CH2CH2CH3
Butane
 A3
 1000
 0.15
R-600a
 CH(CH3~~)2CH~~3
 2-methylpropane (isobutene)
 A3
 1000
 0.59
R-601
 CH3CH2CH2CH2~~ CH~~3
Pentane
 A3
 600
 0.18
R-601a
(CH3~~)2CHCH2CH~~3
 2-methylbutane (isopentane)
 A3
 600
 0.18
R-610
 CH3CH2OCH2CH3
Ethoxyethane (ethyl ether)
 ––
 400
 ––
R-611
 HCOOCH3
Methyl formate
 B2
 100
 ––


R-630
 CH3NH2
Methanamine (methyl amine)
 ––
 ––
 ––
R-631
 CH3CH2(NH2)
Ethanamine (ethyl amine)
 ––
 ––
 ––
R-702
 H2
Hydrogen
 A3
 ––
 ––
R-717
 NH3
 Ammonia
 B2L
 25
 0.014
R-718
 H2O
 Water
 A1
 ––
 ––
R-728
 N2
 Nitrogen
 A1
 ––
 ––
2
R-744 CO2 Carbon dioxide A1 5000 3.4

2019 CALIFORNIA MECHANICAL CODE 231

REFRIGERATION any other purpose or distributed to any other persons or parti es.

TABLE 1102.3 (continued) REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8

ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE

ASHRAE ASHRAE

ASHRAE ASHRAE

[ASHRAE 34: TABLE 4-1, TABLE 4-2]
REFRIGERANT
 CHEMICAL FORMULA
 CHEMICAL NAME1
(COMPOSITION FOR BLENDS)
 SAFETY
GROUP7
 OEL2
(ppm)
 POUNDS PER 1000
CUBIC FEET OF SPACE
R-744A
 N2O
 Nitrous oxide
 ––
 ––
 ––
R-764
 SO2
Sulfur dioxide
 B1
 ––
 ––
R-1130(E)
 CHCl=CHCl
Trans-1,2-dichloroethene
 B1
 200
 0.25
R-1150
 CH2=CH2
 Ethene (ethylene)
 A3
 200
 ––
R-1233zd(E)
 CF3CH=CHCl
Trans-1-chloro-3,3,3-trifluoro-1- propene
 A1
 800
 5.3
R-1234yf
 CF3CF=CH2
2, 3, 3, 3-tetrafluoro-1-propene
 A2L
 500
 4.7
R-1234ze(E)
 CF3CH=CHF
Trans-1,3,3,3- tetrafluoro-1-propene
 A2L
 800
 4.7
R-1270
 CH3CH=CH2
Propene (propylene)
 A3
 500
 0.11
1336mzz(Z)
 CF3CHCHCF3
Cis-1,1,1,4,4,4-hexaflouro-2-butene
 A1 500 5.4

Notes: 1 The preferred chemical name is followed by the popular name in parenthesis. 2 The OELs are 8-hour TWAs; a “C” designation denotes a ceiling limit. 3 Azeotropic refrigerants exhibit some segregation of components at conditions of temperature and pressure other than those at which they were formulated. The extent of segregation depends on the particular azeotrope and hardware system configuration. 4 The exact composition of this azeotrope is in question and additional experimental studies are needed. 5 R-507, R-508, and R-509 are allowed alternative designations for R-507A, R-508A, and R-509A due to a change in designations after assignment of R-500 through R-509. Corresponding changes were not made for R-500 through R-506. 6 The RCL values for these refrigerant blends are approximated in the absence of adequate data for a component comprising less than 4 percent m/m of the blend and expected to have a small influence in an acute, accidental release. 7 Refrigerant flammability classification of Class 2L shall comply with the requirements for flammability classification of Class 2. 8 In accordance with Section 1102.2, ammonia refrigeration systems are not regulated by this chapter. R-717 (ammonia) is included in this table because the table is extracted from ASHRAE 34 and is not capable of being modified.

232 2019 CALIFORNIA MECHANICAL CODE

REFRIGERATION

TABLE 1104.1 PERMISSIBLE REFRIGERATION SYSTEMS 1

OCCUPANCY GROUP3 HIGH-PROBABILITY SYSTEM LOW PROBABILITY SYSTEM MACHINERY ROOM









~~2 ~~



~~2 ~~

2



















~~2 ~~




















~~2 ~~



2


2 A refrigerant shall be permitted to be used within a high-probability system where the room or space is in accordance with Section 1104.4. 3 Occupancy classifications are defined in the building code.

2019 CALIFORNIA MECHANICAL CODE 233

any other purpose or distributed to any other persons or parti es.

234 2019 CALIFORNIA MECHANICAL CODE

CALIFORNIA MECHANICAL CODE – MATRIX ADOPTION TABLE

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▸Contents — California Mechanical Code (Title 24, Part 4)
California Mechanical Code (Title 24, Part 4)
  1. Chapter 1 — GENERAL CODE PROVISIONS
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — GENERAL REGULATIONS
  4. Chapter 4 — VENTILATION AIR
  5. Chapter 5 — EXHAUST SYSTEMS
  6. Chapter 6 — DUCT SYSTEMS
  7. Chapter 7 — COMBUSTION AIR
  8. Chapter 8 — CHIMNEYS AND VENTS
  9. Chapter 9 — INSTALLATION OF SPECIFIC APPLIANCES
  10. Chapter 10 — BOILERS AND PRESSURE VESSELS
  11. ▸Chapter 11 — REFRIGERATION
    Overview
    1. 1103.3 Higher Flammability Refrigerants. Group A3
    2. 1101.1 Applicability. 1101.0 General. Part I governs the desig…
    3. 1101.2 Equipment. Equipment for refrigerant recovery,
    4. 1102.1 General.1102.0 Refrigeration Systems. Refrigeration sys…
    5. 1102.2 Ammonia Refrigeration Systems. Refrigeration
    6. 1102.3 Refrigerants. The refrigerant used shall be of a type
    7. 1103.1 Classification of Refrigerants. 1103.0 Classification. …
    8. 1104.1 System Selection. tion System Use. Refrigeration system…
    9. 1104.2 Refrigerant Concentration Limit. The concentration of r…
    10. 1104.5 Flammable Refrigerants. The total of Group A2,
    11. 1104.6 Applications for Human Comfort and for Non-industrial O…
    12. 1104.7 Refrigerant Type and Purity. Refrigerants shall
    13. 1104.3 Institutional Occupancies. The RCL value
    14. 1104.8 Changing Refrigerants. A change in the type of
    15. 1105.2 Supports and Anchorage. Supports and anchorage for refr…
    16. 1105.3 Access. An unobstructed readily accessible opening and …
    17. 1105.4 Illumination and Service Receptacles. In addition to th…
    18. 1105.6 Prohibited Locations. Refrigeration systems or
    19. 1105.7 Condensate. Condensate from air-cooling coils
    20. 1105.8 Defrost. Where defrost cycles are required for portions…
    21. 1105.9 Overflows. Where condensate or defrost liquids are
    22. 1105.11 Refrigerant Port Protection. Air conditioning
    23. 1105.12 Storage. Refrigerants and refrigerant oils not
    24. 1106.5 Combustion Air. No open flames that use combustion air …
    25. 1106.6 Airflow. There shall be no airflow to or from an occupi…
    26. 1106.7 Ventilation Intake. Makeup air intakes to replace
    27. 1106.8 Maximum Temperature. Ventilation or mechanical
    28. 1106.9 Refrigerant Parts in Air Duct. Joints and refrigerant-c…
    29. 1106.3 Normal Operation. A part of the refrigeration
    30. 1106.4 Natural Ventilation. Where a refrigerating system
    31. 1108.2 Electrical. Electrical equipment and installations shall
    32. 1108.3 Emergency Shut-off. A clearly identified emergency shut…
    33. 1106.10 Dimensions. Refrigeration machinery rooms shall
    34. 1106.11 Restricted Access. Access to the refrigeration
    35. 1106.12 Exits. Exits shall comply with the building code for
    36. 1107.0 Machinery Room, Special Requirements.1107.1 General. In…
    37. 1108.4 Installation, Maintenance, and Testing. Detection and a…
    38. 1108.5 Emergency Pressure Control System. Where
    39. 1109.1 Materials. 1109.0 Refrigeration Piping, Containers, and…
    40. 1109.2 Joints. Iron or steel pipe joints shall be of approved
    41. 1109.3 Penetration of Piping. Refrigerant piping shall not
    42. 1109.4 Location of Refrigeration Piping. Refrigerant
    43. 1109.5 Underground Piping. Refrigerant piping placed
    44. 1109.6 Support. In addition to the requirements of Section
    45. 1109.7 Pipe Enclosure. Refrigerant piping and tubing
    46. 1109.8 Visual Inspection. Refrigerant piping and joints
    47. 1109.9 Condensation. Piping and fittings that convey
    48. 1109.10 Identification. Piping shall be in accordance with
    49. 1110.4 Access. Stop valves required by Section 1110.0 shall
    50. 1110.5 Identification. Stop valves shall be identified by tagg…
    51. 1111.1 Where Required.1111.0 Pressure-Limiting Devices. Pressu…
    52. 1111.2 Setting. Pressure limiting devices shall be set in
    53. 1110.2 More than 110 Pounds of Refrigerant. Systems
    54. 1110.3 Support. Stop valves installed in copper refrigerant
    55. 1111.3 Location. Stop valves shall not be installed between
    56. 1111.4 Emergency Stop. Activation of a pressure limiting
    57. 1112.2 Positive Displacement Compressor. A positive
    58. 1112.5 Hydrostatic Expansion. Pressure rise resulting
    59. 1112.6 Actuation. Pressure-relief devices shall be directpress…
    60. 1112.3 Liquid-Containing Portions of Systems. Liquid-containin…
    61. 1112.4 Evaporators. Heat exchanger coils located downstream, o…
    62. 1112.7 Stop Valves Prohibited. Stop valves shall not be
    63. 1112.8 Location. Pressure-relief devices shall be connected
    64. 1112.9 Materials. The seats and discs of pressure-relief
    65. 1112.10 Pressure-Relief Device Settings. Pressure-relief
    66. 1112.11 Discharge from Pressure-Relief Devices. Pressure-relie…
    67. 1112.12 Discharge Piping. The piping used for pressurerelief d…
    68. 1113.2 Type of Protection. Pressure vessels with an internal g…
    69. 1113.3 Discharging into Lowside of System. For pressure-relief…
    70. 1113.4 Parallel Pressure-Relief Devices. Two or more
    71. 1113.5 Discharge Capacity. The minimum required discharge capa…
    72. 1112.13 Rating of Pressure-Relief Device. The rated
    73. 1114.0 Special Discharge Requirements.1114.1 General. Systems …
    74. 1114.2 Design Requirements. Flaring devices shall be
    75. 1114.3 Testing. Flaring systems shall be tested to demonstrate…
    76. 1113.6 Three-Way Valve. Pressure vessels of 10 cubic feet
    77. 1115.1 General. 1115.0 Labeling and Identification. In additio…
    78. 1115.2 Volume and Type. A condenser, receiver, absorber,
    79. 1115.3 Permanent Sign. In a refrigeration machinery room
    80. 1115.4 Marking of Pressure-Relief Devices. Pressurerelief valv…
    81. 1116.1 Factory Tests. 1116.0 Testing of Refrigeration Equipmen…
    82. 1116.3 Test Gases. Tests shall be performed with dry nitrogen …
    83. 1116.2 Field Tests. Refrigerant-containing parts of a system t…
    84. 1116.4 Declaration. A dated declaration of test shall be provi…
    85. 1116.5 Brine Systems. Brine-containing portions of a system sh…
    86. 1117.1 Inside Dimensions 6 inches or Less.1117.0 Refrigerant-C…
    87. 1117.2 Inside Dimensions More than 6 inches. Pressure vessels …
    88. 1117.3 Pressure Vessels for 15 psig or Less. Pressure
    89. 1122.2 Automated Control of Cycles of Concentra-tion. Cooling …
    90. 1123.1 General. 1123.0 Location. Cooling towers, evaporative c…
    91. 1124.1 General. 1124.0 Electrical. Electrical systems shall be…
    92. 1125.1 General. 1125.0 Refrigerants and Hazardous Fluids. Equi…
    93. 1126.0 Drift Eliminators.1126.1 General. Cooling towers, evapo…
  12. Chapter 12 — HYDRONICS
  13. Chapter 13 — FUEL GAS PIPING
  14. Chapter 14 — PROCESS PIPING
  15. Chapter 15 — SOLAR ENERGY SYSTEMS
  16. Chapter 16 — STATIONARY POWER PLANTS
  17. Chapter 17 — REFERENCED STANDARDS
  18. Appendix A — RESIDENTIAL PLAN EXAMINER REVIEW FORM FOR HVAC SY…
  19. Appendix B — PROCEDURES TO BE FOLLOWED TO PLACE GAS EQUIPMENT …
  20. Appendix C — INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIR…
  21. Appendix D — FUEL SUPPLY: MANUFACTURED/MOBILE HOME PARKS AND R…
  22. Appendix E — SUSTAINABLE PRACTICES
  23. Appendix F — SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION …
  24. Appendix G — EXAMPLE CALCULATION OF OUTDOOR AIR RATE

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