How can I use the Evaporator Fan with pressure-controlled or CPC systems?
Refrigeration systems employing TXV (Thermal Expansion Valve), AXV (Automatic Expansion Valve), or other pressure-controlled regulation of the cooler temperature must be modified to work with the Evaporator Fan. Because the Evaporator Fan must sense some electrical activity to indicate whether the system is in cooling mode or idle, it cannot detect this status in pressure-controlled systems. The easiest conversion to allow installation of a Evaporator Fan is to add a standard thermostat and solenoid valve to the system. This will allow the Evaporator Fan to operate normally, and may even solve some other maintenance problems with the cooling system. The Evaporator Fan is not applicable to CPC systems, or any system which uses modulated or variable expansion valves, unless the system can be converted to standard thermostat / solenoid valve operation. Typically, the CPC systems are used in coolers which require very tight temperature control, and cannot be converted.
