I am using a power venter and CK-20F/HWK control kit with a 750-millivolt pool heater. Why won the thermocouple adapter threads screw into the gas valve?
The thermocouple adapter is not needed with 750-millivolt systems since the GSK-3 spill switches can be wired in series with the main gas valve circuit. The CK-20F/HWK has a thermocouple adapter for 30-millivolt thermocouple systems. A 750-millivolt system has a thermopile (powerpile, pilot generator, etc.) which would not use a thermocouple system.
Related Questions
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