Colt offers ‘multi-split’ air conditioning with low refrigerant use

Colt
With a refrigerant charge of less than 3 kg, the Colt Caloris WRF air-conditioning system is promoted as an alternative to VRF without the issues associated with large quantities of refrigerant.
Colt International is promoting its WRF air-conditioning system as a viable alternative to VRF. It is described as combining the advantages of VRF with a safe and flexible water-based system. Water is used as the main medium for energy transfer in the building, rather than refrigerant. Indoor units are linked by the neutral-temperature water loop and reject heat to the loop to provide cooling in the space or extract heat to provide heating. Refrigerant charge is minimal and confined to the Caloris central unit. The Caloris WRF (water and refrigerant flow) system allows an unlimited number of indoor units and unlimited piping length. Plastic pipework is recommended for ease of insulation and because it does not require insulation. Darren Civil, climate-control general manage, says, ‘Colt is very aware that the proposed F-gas regulations, expected to come into force in 2007, will have on the annual maintenance and joint testing of systems with more than 3 kg of HFC charge. Since the Caloris has been designed to contain less than 3 kg, only the outdoor unit will require inspection during its routine maintenance service.’
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