User guide

Application Guide | Gas detection in refrigeration systems
20 DKRCI.PA.S00.A1.02 | 520H12772 © Danfoss | DCS (MWA) | 2018.05
Annex I
Common refrigerant data
Refrigerant
type
Refrigerant Name Formula Safety
group
Vapour density
@ 25°C /
1 bar
Relativ density ODP
Ozone Pepletion
Portential
GWP
100
Global Warming
Potential
(100 yr ITH/F
gas regulation)
[kg/m
3
] [–] [–] [–]
– R717 Ammonia NH
3
B2L 0.700 0.6 0 0
– R744 Carbon Dioxide CO
2
A1 1.80 1.5 0 1
HCFC R22 Chlorodifluoromethane CHCIF
2
A1 3.54 3.0 0.055 1810
HFC R134a 1,1,1,2-tetraflouroroethane CH
2
FCF
3
A1 4.17 3.5 0 1430
HFC R404A R125/143a/134a (44/52/4) – A1 3.99 3.3 0 3260
HFC R407C R32/125/134a (23/25/52) – A1 3.53 2.9 0 1520
HFC R410A R32/125 (50/50) – A1 2.97 2.5 0 1900
HFC R507 R125/143a (50/50) – A1 4.04 3.4 0 3800
HC R290 Propane CH
3
CH
2
CH
3
A3 1.8 1.5 0 3
HC R600 Butane CH
3
CH
2
CH
2
CH
3
A3 2.38 2.0 0 4
HC R600a Iso-butane CH(CH
3
) A3 2.38 2.0 0 3
HC R1270 Propylene CH
3
CH=CH
2
A3 1.72 1.4 0 2
HFC R32 Difluoromethane CH
2
F
2
A2L 2.13 1.8 0 675
HFO/HFC R1234ze(E) Trans-1,3,3,3-tetrafluoro-1-propene CF
3
CH=CHF A2L 4.66 3.9 0 7
Annex II
EN 378:2016 and ISO 5149:2014
Refrigerant
type
Refrigerant Name Safety
group
Practical
Limit
Toxicity
ATEL /ODL
Flammability
LFL
Alarm settings
50% of
ATEL/
ODL
25% of
LFL
Pre-alarm
level MAX
refrigeration
concentration
Main-alarm
MAX
refrigeration
concentra-
tion
[kg/m3] [kg/m3] [kg/m3] [ppm] [ppm] [ppm] [ppm]
- R717 Ammonia B2L 0.00035 0.00022 0.116 157 33143
EN 378: 500
ISO 5149: 200
30000
- R744 Carbon Dioxide A1 0.1 0.072 - 20000 - 20000
HCFC R22 Chlorodifluoromethane A1 0.3 0.21 - 29661 - 29600
HFC R134a 1,1,1,2-tetraflouroroethane A1 0.25 0.21 - 25180 - 25100
HFC R404A R125/143a/134a (44/52/4) A1 0.52 0.52 - 65163 - 65100
HFC R407C R32/125/134a (23/25/52) A1 0.31 0.29 - 41076 - 41000
HFC R410A R32/125 (50/50) A1 0.44 0.42 - 70707 - 70700
HFC R507A R125/143a (50/50) A1 0.53 0,53 - 65594 - 65500
HC R290 Propane A3 0.008 0.09 0.038 25000 4222 4200
HC R600 Butane A3 0.0089 0.0024 0.038 504 3193 500
HC R600a Iso-butane A3 0.011 0.059 0.043 12395 3613 3600
HC R1270 Propylene A3 0.008 0.0017 0.046 494 5349 490
HFC R32 Difluoromethane A2L 0.061 0.30 0.307 70423 28826 28800
HFO/HFC R1234ze(E) Trans-1,3,3,3-tetrafluoro-1-propene A2L 0.061 0.28 0.303 30043 13004 13000