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    brucect's Avatar
    brucect Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 5, 2006, 07:41 AM
    New air handler hook up
    I have a burnam oil fired boiler w/ 2 air handlers for both heating and cooling. I am adding a 3rd air handler it's the same as my others but newer and has a circuit board instead of selinoids and relays The air handler is a First Co model #36HBXB-HW, a TACO571-2 zone valve and a Robertshaw 9400 thermostat. I have the 110 volt line in through a switch with a receptacle for the condensat pump, and the thermostat wired in. How does the zone valve get connected? Thereare 2 orange wires on the air handler labeled motorized valve do they just get run to the zone valve?and is it OK to power a 3rd zone valve from the transformer on the boiler?
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #2

    Nov 5, 2006, 01:58 PM
    You need the total amp draw if all zones are open plus amp draw of boiler, to know if current transformer VA is big enough.
    KidChaos's Avatar
    KidChaos Posts: 45, Reputation: 3
    Junior Member
    		  
    #3

    Jun 30, 2012, 09:29 PM
    Yes going large on the transformers VA ratings a great thing and can't hurt, I like the cicuit breakers on the 75va models! Cool idea!
    And circuit board vs electromechanical relays is no different as to control wiring, its compatible.
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