The thermostat controls the compressor and condenser fan and will cycle on and off based on the setting of the thermostat. The radiator fans will operate at full speed only when the thermostat contacts are closed.
When the thermostat contacts open then the RFC uses the temperature sender in the radiator as a reference in a closed loop operation.
The radiator in the RFC installation manual is a modified factory radiator to PE specs. It has 2 rows of cores that are centered to look like there are 3 rows. The tanks are modified and the factory temp switch holes are removed and a 3/8" NPT port is added for the RFC temp sensor.
The radiators are modified locally for me to sell to customers that want this light weight efficient design.
No link, proprietary design.
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