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Colt International has developed WRF (Water and Refrigerant Flow) - a revolutionary air conditioning
system designed to meet the environmental requirements of both current and future building regulations,
including F-Gas. Colt is launching WRF as a viable alternative to VRF and VRV air conditioning,
combining their advantages with a safe and flexible, water-based system.
The Colt-Caloris is a typical example of a WRF system, based on reverse cycle water source heat
pump technology. It uses water as its main energy transfer medium instead of refrigerant. Local
units are linked together by this neutral temperature water loop to form a complete system.
Refrigerant charge is minimal and local to the Caloris unit so it is not dispersed throughout the
building. In the unlikely event of a refrigerant leak, only a small amount would discharge from the
unit, as opposed to from the whole system as with other forms of air conditioning.
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"Colt is very aware of the impact that the proposed F-Gas Regulations, expected to come into force
in 2007, will have on the registration and competency of installers and on the annual maintenance
and joint testing of systems with more than 3kg of HFC refrigerant charge," said Darren Civil,
Climate Control General Manager. "Since Colt-Caloris has been designed to contain less than 3kgs,
only the outdoor unit will require inspection during its routine maintenance service."
The Caloris WRF system is highly flexible, allowing an unlimited number of units and piping lengths.
Plastic pipework is recommended; since this is easy to install and alter, and, as it does not
require insulation, there are significant on-site benefits, along with time and cost savings.
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