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

    Feb 12, 2007, 06:17 PM
    How to wire two thermostats to run one circulating pump
    How do you wire two 24v thermostats in two different zones that will run one 110v circulating pump?
    Thanks
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Feb 12, 2007, 07:26 PM
    If you system was properly installed each zone has a solenoid on the hot water manifold. One stat goes to one solenoid and the other stat to the remaining solenoid.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member
    		  
    #3

    Feb 12, 2007, 08:27 PM
    In a zone system, the thermostat has 2 jobs, fire up the boiler and open the zone valve. The circulating pump should be wired to the circuit that fires up the boiler. In some systems, then the valve opens, it makes a circuit to fire the boiler. Check the sticky at the top of the heating forum for more details.
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
    Ultra Member
    		  
    #4

    Feb 12, 2007, 08:56 PM
    Each thermostat should control a zone valve, when the valve opens an end switch closes turning on the boiler and/or circ' pump.
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