1102.3 Access port protection.

Refrigerant access ports shall be protected in accordance with Section 1101.12 whenever refrigerant is added to or recovered from refrigeration or air-conditioning systems.

Section MC 1103: Refrigeration System Classification

1103.1 Refrigerant classification.

Refrigerants shall be classified in accordance with ASHRAE 34 as listed in Table 1103.1.

Table 1103.1
Refrigerant Data and Safety Classifications a

Refrigerant Number	Chemical Name	Chemical Formula	OEL d ppm v/v	Safety c Group	RCL
					(ppm v/v)	(g/m 3 )	Ib/Mcf
Methane Series
11 b	trichlorofluoromethane	CCl3F	C1000	A1	1,100	6.2	.39
12 b	dichlorodifluoromethane	CCl2F2	1,000	A1	18,000	90	5.6
13 b	chlorotrifluoromethane	CClF3	1,000	A1	-	-	-
13B1 b	bromotrifluoromethane	CBrF3	1,000	A1	-	-	-
14	tetrafluoromethane (carbon tetrafluoride)	CF4	1,000	A1	110,000	400	25
21	dichlorofluoromethane	CHCl2F	-	B1	-	-	-
22	chlorodifluoromethane	CHClF2	1,000	A1	59,000	210	13
23	trifluoromethane	CHF3	1,000	A1	41,000	120	7.3
30	dichloromethane (methylene chloride)	CH2Cl2	-	B2	-	-	-
32	difluoromethane (methylene fluoride)	CH2F2	1,000	A2L	36,000	77	4.8
40	chloromethane (methyl chloride)	CH3Cl	-	B2	-	-	-
50	methane	CH4	1,000	A3	-	-	-
Ethane Series
113 b	1,1,2-trichloro-1,2,2-trifluoroethane	CCl2FCClF2	1,000	A1	2,600	20	1.2
114 b	1,2-dichloro-1,1,2,2- tetrafluoroethane	CClF2CClF2	1,000	A1	20,000	140	8.7
115 b	chloropentafluoroethane	CClF2CF3	1,000	A1	120,000	760	47
116	hexafluoroethane	CF3CF3	1,000	A1	97,000	550	34
123	2,2-dichloro-1,1,1,-trifluoroethane	CHCl2CF3	50	B1	9,100	57	3.5
124	2-chloro-1,1,1,2-tetrafluoroethane	CHClFCF3	1,000	A1	10,000	56	3.5
125	pentafluoroethane	CHF2CF3	1,000	A1	75,000	370	23
134 a	1,1,1,2-tetrafluoroethane	CH2FCF3	1,000	A1	50,000	210	13
142 b	1-chloro-1, 1-difluoroethane	CH3CClF2	1,000	A2	20,000	83	5.1
143 a	1,1,1-trifluoroethane	CH3CF3	1,000	A2L	21,000	70	4.5
152 a	1,1-difluoroethane	CH3CHF2	1,000	A2	12,000	32	2.0
170	ethane	CH3CH3	1,000	A3	7,000	8.7	0.54
Ethers
E170	methoxymethane (dimethyl ether)	CH3OCH3	1,000	A3	8,500	16	1.0
Propane
218	octafluoropropane	CF3,CF2CF3	1,000	A1	90,000	690	43
227 ea	1,1,1,2,3,3,3-heptafluoropropane	CF3CHFCF3	1,000	A1	84,000	580	36
236 fa	1,1,1,3,3,3-hexafluoropropane	CF3CH2CF3	1,000	A1	55,000	340	21
245 fa	1,1,1,3,3-pentafluoropropane	CHF2CH2CF3	300	B1	34,000	190	12
290	propane	CH3CH2CH3	1,000	A3	5,300	9.5	0.56
Cyclic Organic Compounds
C318	octafluorocyclobutane	-(CF2)4-	1,000	A1	80,000	660	41
Miscellaneous Organic Compounds Hydrocarbons
600	butane	CH3CH2CH2CH3	1,000	A3	-	-	.51
600 a	2-methylpropane (isobutane)	CH(CH3)2CH3	1,000	A3	4,000	9.6	.59
601	pentane	CH3CH2CH2CH2CH3	600	A3	1,000	2.9	.18
601 a	2-methylbutane (isopentane)	(CH3)2CHCH2CH3	600	A3	1,000	2.9	.18
611	methyl formate	HCOOCH3	100	B2	-	-	-
Inorganic Compounds
702	hydrogen	H2	-	A3	-	-	-
704	helium	He	-	A1	-	-	-
717	ammonia	NH3	25	B2L	320	0.22	.014
718	water	H2O	-	A1	-	-	-
720	neon	Ne	-	A1	-	-	-
728	nitrogen	N2	-	A1	-	-	-
740	argon	Ar	-	A1	-	-	-
744	carbon dioxide	CO2	5000	A1	40,000	72	4.5
764	sulfur dioxide	SO2	-	B1	-	-	-
Unsaturated Organic Compounds
1150	ethene (ethylene)	CH2=CH2	200	A3	-	-	-
1234yf	2,3,3,3-tetrafluoro-1-propene	CF3CF=CH2	500	A2L	16,000	75	4.7
1234ze(E)	trans-1,3,3,3-tetrafluoro-1-propene	CF3CH=CHF	800	A2L	16,000	75	4.7
1270	propene (propylene)	CH3CH=CH2	500	A3	1,000	1.7	.1
Zeotropes (Refrigerant Blends)
400 (50%/50%) b	R-12/114 (50.0/50.0)		1,000	A1	28,000	160	10
400 (60%/40%) b	R-12/114 (60.0/40.0)		1,000	A1	30,000	170	11
401A	R-22/152a/124 (53.0/13.0/34.0)	(±2.0/+0.5, -1.5;/±1.0)	1,000	A1	27,000	110	6.6
401B	R-22,/152a/124 (61.0/11.0/28.0)	(±2.0/+0.5, -1.5/±1.0)	1,000	A1	30,000	120	7.2
401C	R-22,/152a/124 (33.0/15.0/52.0)	(±2.0/+0.5, -1.5/±1.0)	1,000	A1	20,000	84	5.2
402A	R-125/290/22 (60.0/2.0/38.0)	(±2.0/+0.1, -1.0/±2.0)	1,000	A1	33,000	140	8.5
402B	R-125/290/22 (38.0/2.0/60.0)	(±2.0/+0.1, -1.0/±2.0)	1,000	A1	63,000	240	15
403A	R-290/22/218 (5.0/75.0/20.0)	(+.2, -2.0/±2.0/±2.0)	1,000	A2	33,000	120	7.6
403B	R-290/22/218 (5.0/56.0/39.0)	(+.2, -2.0/±2.0/±2.0)	1,000	A1	70,000	290	18
404A	R-125/143a/134a (44.0/52.0/4.0)	(±2.0/±1.0/±2.0)	1,000	A1	130,000	500	31
406A	R-22/600a/142b (55.0/4.0/41.0)	(±2.0/±1.0/±1.0)	1,000	A2	21,000	25	4.7
407A	R-32/125/134a (20.0/40.0/40.0)	(±2.0/±2.0/±2.0)	1,000	A1	83,000	300	19
407B	R-32/125/134a (10.0/70.0/20.0)	(±2.0/±2.0/±2.0)	1,000	A1	79,000	330	21
407C	R-32/125/134a (23.0/25.0/52.0)	(±2.0/±2.0/±2.0)	1,000	A1	81,000	290	18
407D	R-32/125/134a (15.0/15.0/70.0)	(±2.0/±2.0/±2.0)	1,000	A1	68,000	250	16
407E	R-32/125/134a (25.0/15.0/60.0)	(±2.0/±2.0/±2.0)	1,000	A1	80,000	280	17
407F	R-32/125/134a (30.0/30.0/40.0)	(±2.0/±2.0/±2.0)	1,000	A1	95,000	320	20
408A	R-125/143a/22 (7.0/46.0/47.0)	(±2.0/±1.0/±2.0)	1,000	A1	95,000	110	21
409A	R-22/124/142b (60.0/25.0/15.0)	(±2.0/±2.0/±1.0)	1,000	A1	29,000	120	7.1
409B	R-22/124/142b (65.0/25.0/10.0)	(±2.0/±2.0/±1.0)	1,000	A1	30,000	390	7.3
410A	R-32/125 (50.0/50.0)	(+0.5, -1.5/+1.5, -0.5)	1,000	A1	140,000	420	26
410B	R-32/125 (45.0/55.0)	(±1.0/±1.0)	1,000	A1	140,000	430	27
411A	R-1270/22/152a(1.5/87.5/11.0)	(+0.0, -1.0/+2.0,-0.0/+0.0, -1.0)	990	A2	14,000	46	2.9
411B	R-1270/22/152a(3.0/94.0/3.0)	(+0.0, -1.0/+2.0,-0.0/+0.0, -1.0)	980	A2	13,000	45	2.8
412A	R-22/218/142b (70.0/5.0/25.0)	(±2.0/±2.0/±1.0)	1,000	A2	22,000	82	5.1
413A	R-218/134a/600a (9.0/88.0/3.0)	±1.0/±2.0/+0.0,-1.0)	1,000	A2	22,000	95	5.8
414A	R-22/124/600a/142b(51.0/28.5/4.0/16.5)	(±2.0/±2.0/±0.5 /+0.5, -1.0)	1,000	A1	26,000	100	6.4
414B	R-22/124/600a/142b(50.0/39.0/1.5/9.5)	(±2.0/±2.0/±0.5 /+0.5, -1.0)	1,000	A1	23,000	95	6.0
415A	R-22/152a (82.0/18.0)	(±1.0/±1.0)	1,000	A2	57,000	190	12
415B	R-22/152a (25.0/75.0)	(±1.0/±1.0)	1,000	A2	52,000	120	9.3
416A	R-134a/124/600(59.0/39.5/1.5)	(+0.5, -1.0/+1.0,-0.5/+1.0, -0.2)	1,000	A1	14,000	62	3.9
417A	R-125/134a/600 (46.6/50.0/3.4)	(±1.1/±1.0/+0.1,-0.4)	1,000	A1	13,000	56	3.5
417B	R-125/134a/600 (79.0/18.3/2.7)	(±1.0/±1.0/+0.1,-0.5)	1,000	A1	15,000	70	4.3
418A	R-290/22/152a (1.5/96.0/2.5	(±0.5/±1.0/±0.5)	1,000	A2	59,000	200	13
419A	R-125/134a/E170 (77.0/19.0/4.0)	(1.0/1.0/1.0)	1,000	A2	70,000	310	19
420A	R-134a/142b (88.0/12.0)	(+1.0,-0.0/+0.0,-1.0)	1,000	A1	45,000	190	12
421A	R-125/134a (58.0/42.0)	(±1.0/±1.0)	1,000	A1	61,000	280	17
421B	R-125/134a (85.0/15.0)	(±1.0/±1.0)	1,000	A1	69,000	330	21
422A	R-125/134a/600a (55.0/42.0/3.0)	(±1.0/±1.0/+0.1,-0.4)	1,000	A1	63,000	290	18
422B	R-125/134a/600a (82.0/15.0/3.0)	(±1.0/±1.0/+0.1,-0.5)	1,000	A1	56,000	250	16
422C	R-125/134a/600a (82.0/15.0/3.0)	(±1.0/±1.0/+0.1,-0.5)	1,000	A1	62,000	290	18
422D	R-125/134a/600a(65.1/31.5/3.4)	(+0.9,-1.1/±1.0/+0.1,-0.4)	1,000	A1	58,000	260	16
423A	R-134a/227ea (52.5/47.5)	(±1.0/±1.0)	1,000	A1	59,000	310	19
424A	R-125/134a/600a/600/601a(50.5/47.0/0.9/1.0/0.6)	(±1.0/±1.0/+0.1,-0.2/+0.1, +0.2/+0.1,-0.2)	970	A1	23,000	100	6.2
425A	R-32/134a/227ea (18.5/69.5/12.0)	(±0.5/±0.5/±0.5)	1,000	A1	72,000	260	16
426A	R-125/134a/600/601a(5.1/93.0/1.3/0.6)	(±1.0/±1.0/+0.1,-0.2/+0.1, -0.2)	990	A1	20,000	83	5.2
427A	R-32/125/143a/134a(15.0/25.0/10.0/50.0)	(±2.0/±2.0/±2.0/;±2.0)	1,000	A1	79,000	290	18
428A	R-125/143a/290/600a(77.5/20.0/0.6/1.9)	(±1.0/±1.0/+0.1,-0.2/+0.1, -0.2)	1,000	A1	83,000	370	23
429A	R-E170/152a/600a(60.0/10.0/30.0)	(±1.0/±1.0/±1.0)	1,000	A3	6,300	13	.81
430A	R-152a/600a (76.0/24.0)	(±1.0/±1.0)	1,000	A3	8,000	21	1.3
431A	R-290/152a (71.0/29.0)	(±1.0/±1.0)	1,000	A3	5,500	11	.69
432A	R-1270/E170 (80.0/20.0)	(±1.0/±1.0)	710	A3	1,200	2.1	.13
433A	R-1270/290 (30.0/70.0)	(±1.0/±1.0)	880	A3	3,100	5.5	.34
433B	R-1270/290 (5.0/95.0)	(±1.0/±1.0)	950	A3	4,500	8.1	.51
433C	R-1270/290 (25.0/75.0)	(±1.0/±1.0)	790	A3	3,600	6.6	.41
434A	R-125/143a/134a/600a(63.2/18.0/16.0/2.8)	(±1.0/±1.0±1.0/+0.1,-0.2)	1,000	A1	73,000	320	20
435A	R-E170/152a (80.0/20.0)	(±1.0/±1.0)	1,000	A3	8,500	17	1.1
436A	R-290/600a (56.0/44.0)	(±1.0/±1.0)	1,000	A3	4,000	8.1	.5
436B	R-290/600a (52.0/48.0)	(±1.0/±1.0)	1,000	A3	4,000	8.1	.5
437A	R-125/134a/600/601(19.5/78.5/1.4/0.6)	(+0.5,-1.8/+1.5,-0.7/+0.1,-0.2/+0.1,-0.2)	990	A1	19,000	81	5.0
438A	R-32/125/134a/600/601a(8.5/45.0/44.2/1.7/0.6)	(+0.5,-1.5/±1.5/±1.5/+0.1,-0.2/+0.1,-0.2)	990	A1	20,000	79	4.9
439A	R-32/125/600a(50.0/47.0/3.0)	(±1.0/±1.0/±0.5)	990	A2	26,000	76	4.7
440A	R-290/134a/152a(0.6/1.6/97.8)	(±1.0/±0.6/±0.5)	1,000	A2	12,000	31	1.9
441A	R-179/290/600a/600(3.1/54.8/6.0/36.1)	(±0.3/±2.0/±0.6/±2.0)	1,000	A3	3,200	6.3	.39
Azeotropes (Refrigerant Blends)
500 b	R-12/152a (73.8/26.2)	-	1,000	A1	30,000	120	7.6
501 b	R-22/12 (75.0/25.0)	-	1,000	A1	54,000	210	13
502 b	R-22/115 (48.8/51.2)	-	1,000	A1	73,000	330	21
504	R-32/115 (48.2/51.8)	-	1,000	-	140,000	450	28
507A	R-125/143a (50.0/50.0)	-	1,000	A1	130,000	520	32
508A	R-23/116 (39.0/61.0)	-	1,000	A1	55,000	220	14
508B	R-23/116 (46.0/54.0)	-	1,000	A1	52,000	200	13
509A	R-22/218 (44.0/56.0)	-	1,000	A1	75,000	390	24
510A	R-E170/600a (88.0/12.0)	(±0.5/±0.5)	1,000	A3	7,300	14	.87
511A	R-290/E170 (95.0,5.0)	(±1.0/±1.0)	1,000	A3	5,300	9.5	.59

 

For SI: 1 pound = 0.454 kg, 1 cubic foot = 0.0283 m 3 .

a.   Data based on ASHRAE 34 including Addenda a through o. For more complete data, see ASHRAE 34 and Addenda. Use of Addenda issued after Addendum o is subject to approval as set forth in Section 1102.2.

b.   Class I ozone depleting refrigerant. Not permitted for new installations.

c.   Refrigerants in Safety Group "A2L" shall comply with rules of the department. Refrigerants in Safety Group "B2L" shall comply with all applicable requirements for "B2" refrigerants.

d.   OCCUPATIONAL EXPOSURE LIMIT (OEL). The time-weighted average (TWA) concentration for a normal 8-hour workday and a 40-hour workweek to which nearly all workers can be repeatedly exposed without adverse effect, based on the OSHA PEL, ACGIH TLV-TWA, AIHA WEEL, or consistent value.

(Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023)

Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.