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8.0 Refrigerants A number of different refrigerants have been used over the years and all have some degree of impact to the environment. It is important to minimise refrigerant leaks because they can damage the ozone layer and increase greenhouse gases. Early refrigerants used were chlorofluorocarbons (CFCs), but the ozone-depleting nature of these compounds has led to them being phased out and replaced with hydrochlorofluorocarbon (HCFC) compounds such as R-22. For environmental reasons these are now also being phased out and replaced with blended hydrofluro-carbo (HFC) compounds. Currently, the most commonly used refrigerant in residential heat pumps in New Zealand is a HFC blend called R-410A. Compliance document Since 1 January 2008, compliance with the Australia and New Zealand Refrigerant Handling Code of Practice 2007 is mandatory for the handling of fluorocarbon refrigerants by anyone holding a refrigerant handling licence or refrigerant trading authorisation. The Code of Practice is in two parts: • Part 1 covers self-contained low charge systems that do not require any work on the refrigeration circuit to install and contain less than 2 kilograms of fluorocarbon refrigerant. • Part 2 covers all other stationary and transport refrigeration and air conditioning systems. Essential requirements of the code are that: • heat pump systems must be able to be installed, operated, serviced and decommissioned without loss of refrigerant • heat pump systems must be installed by an appropriately qualified person with no-loss refrigerant handling certification • refrigerant must not be intentionally released into the atmosphere. 45PDF Image | Heat pump installation Good Practice Guide
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