Help wiring a fan controlled by thermostat
Asked Mar 7, 2005, 07:52 PM
I purchased a 24,000 BTU forced hot-water heater to be installed in my attached garage, but I'm having a tough time understanding how to wire the fan properly to a thermostat. Currently, I have a 5-zone plus priority 24 volt Argo AZ-6P (120 VAC) Zone Valve controller opperating 3 zones of my home (plus one priority zone for the hot water tank). I would like to have the garage heater opperating on Zone Valve #4. Here is what I think I need to do. Starting with the Top Row wire configuration from Zone Controller Going to the Thermostat: 24 volt Red Wire from Zone Valve Controller to R terminal on Thermostat. White wire from Zone Valve Controller to W Terminal on Thermostat. I think I'm OK there. Now, Bottom Row wire configuration going from Zone Controller to Zone Valve #4. Red wire (24 volt) going from Zone controller to Terminal 1 (top screw) on Zone Valve. White Wire going from Zone controller to Terminal 2 (middle screw) on Zone Valve. Blue Wire going from Zone controller to Terminal 3 (bottom screw) on Zone Valve. I think I'm OK there. Here's where things get tricky for me. The heater fan itself does NOT have any type of relay. It just has your typical 115 volt 3-wire hook-up (hot, neutral, and ground). I'm assuming I need some type of 24 volt relay controlling the power supply to the fan which is triggered by the thermostat. Any recommendations? Also, how do I wire the relay to the thermostat. I'm guessing the green wire goes from the G terminal on the thermostat to one side of the fan relay, but how do I complete the circuit on the relay so that when the zone valve opens the heater fan is triggered. Any help or suggestions would be greatly appreciated! Thank you. Rich A
Last edited by Rich A; Mar 7, 2005 at 08:20 PM.