How do I wire two CK-20F/HWKs and one power venter with two residential gas water heaters?
Connect the hot leg of 120-vac power supply to L1 on the CK-20F/HWK control kit, then run a wire from L1 to the common side on the gas pressure switch. Run a wire from the normally open side of gas pressure switch to the M terminal on the CK-20F/HWK. Run additional wires from L1 on CK-20F/HWK to common side on the second gas pressure switch. Run additional wire from the M terminal on CK-20F/HWK to the normally open terminal on the second gas pressure switch. Then run white wire out of power venter motor to the N terminal on the CK-20F/HWK kit to the neutral from the power source. Connect the black wire on the power venter motor to the M terminal on each control kit.
