Refrigerant Detection Systems

Contemporary environmental regulations have necessitated the use of flammable refrigerants in air conditioning and refrigerating products.

With the large charge amounts used in this equipment, it is necessary to include a leak detection system to provide mitigation to either add circulation or limit the amount of releasable charge to prevent a fire hazard. Annex LL of UL 60335-2-40, the Standard for Household and Similar Electrical Appliances – Safety – Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers, and Annex 101.DVP of UL 60335-2-89, the Standard for Safety for Household and Similar Electrical Appliances – Safety – Part 2-89: Particular Requirements for Commercial Refrigerating Appliances and Ice-Makers with an Incorporated or Remote Refrigerant Unit or Motor-Compressor, describe the specific requirements for refrigerant detection systems, which are integral in this mitigation strategy.