How to hook water pumpl to fan motor?

[badgerfan]

I am trying to hook an outdoor wood burner water pump up the blower fan on existing furnace. Have a 12-2 wire run into furnace, just not sure on what wire to hook to. It is a Payne PG9M. Thanks

[hvactech126]

you are going to need a relay other wise you will blow the board if there is one. Also, how long of a run is your 12-2? A long run like that may affect the amp draw through the blower circuit and damage the blower as well. I would recommend running a 24v signal from fan control to a relay to switch on the pump

[paul52446m]

I am trying to hook an outdoor wood burner water pump up the blower fan on existing furnace. Have a 12-2 wire run into furnace, just not sure on what wire to hook to. It is a Payne PG9M. Thanks

Hi Paul here. like i said in your other post, wire the pump to run all the time.
The only way you can have good even heat is have the pump runing all the time paul