Hydrocarbons are potentially flammable refrigerants and combustion can occur when mixed with air at a ratio of between 2% (LFL) and 10% (UFL) and a source of ignition above 460^oC is applied.

R1270 has a Lower Flammability Level (LFL) of 2% which is equivalent to a concentration of approximately 40g/m3. (0.040Kg/m3).

Common Sources of Ignition.

• Electromechanical Controllers

• Flames (Brazing Torches, cigarette lighters, matches, etc)

• Light Switches

• Contactors

• Thermostats /Timers

• Standard compressor relays / Klixons

• Pressure switches

• Lighting ballasts/starters

• Standard leak detectors

• Fan motors and pumps

• Anything that may cause a spark

To ensure safe operation of the systems, these electrical devices should be replaced with like-for-like, manufacturer-approved components only.

HC system product labels must include the refrigerant type and charge amount

Compressor manufacturers produce specific Hydrocarbon-based models as their associated electrical devices are different.

Compressors/Systems MUST be labeled with a yellow triangle with flame (Symbol ISO 7010 W021 warning, flammable material).

Other Hazards include

• Liquid Refrigerant Freeze Burns – ensure adequate PPE is utilised, gloves, goggles, etc.

• Asphyxiation – care is needed as HC’s are odourless and heavier than air