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    Eclipse Awning's Avatar
    Eclipse Awning Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 16, 2007, 09:20 AM
    Electric Fan Heater
    I have a Modine 47 (115v) fan heater, a thermostat and a zone valve. Currently the thermostat controls the zone valve. How can I wire these together to get the thermostat to control the zone valve and the fan heater?

    Any help would be appreciated.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 16, 2007, 03:42 PM
    Are you trying to control the fan and zone valve together so the fan only runs when the zone valve is open supplying hot water? If so you will need to install a blower relay that will work off the 24 Volt supply to the zone valve if the zone valve is 24 volts. If a different voltage for the zone valve you will have to get a relay with a coil that matches the zone valve on the unit.

    I hope you or someone you know has experience with electric.
    Eclipse Awning's Avatar
    Eclipse Awning Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Nov 19, 2007, 11:48 AM
    There is a line volt thermostat included... will that help with anything??





    Quote Originally Posted by hvac1000
    Are you trying to control the fan and zone valve together so the fan only runs when the zone valve is open supplying hot water? If so you will need to install a blower relay that will work off the 24 Volt supply to the zone valve if the zone valve is 24 volts. If a different voltage for the zone valve you will have to get a relay with a coil that matches the zone valve on the unit.

    I hope you or someone you know has experience with electric.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Nov 19, 2007, 12:28 PM
    You will need to use a relay to activate the fan. Use a relay with the same coil voltage as used on the zone valve. This way you can feed the relay with a circuit for the fan only and activate it off the zone valve power circuit without causing any overload or inner connect problems.
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