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Wiring 2 zones

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  • Wiring 2 zones

    I have a water filled baseboard system for home heating. I have two valve controls (Honeywell) not wired yet. one for the upper zone and one for the lower zone. both valve are in the open position. each valve has 2 red and 2 yellow wires not yet connected. I have two programmable thermostats already wired with 2 wires red and yellow. one in the upper level of my house one in the lower level. Right now only the lower level is connected to the system. what I would like to do is finish wiring the system for 2 independant zones. There is a transformer (Honeywell Control Circuit Transformer) for the system in place but not wired yet to the boiler or thermostat but it is powered (wired) by 110 volt. Right now there is a wire coming from my programmable thermostat (red and yellow) that connects to a wire from my williamson gas boiler (red and yellow), the heating system is currently working but as 1 zone. what must I do to finish wiring for a 2 zone system. the wiring for the 2nd programmable thermostat is all ready here next to the transformer it is just not hooked up to anything. I need step by step help, thank you for any help you can give me.
    Last edited by bigrick7; 05-01-2006, 12:20 AM.

  • #2
    just follow the wiring of the first zone

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    • #3
      the first zone is not hooked up and locked in the open position. the thermostat runs directly to the boiler. the zone valves are not connected and there is nothing connected to the step down transformer. the thermostat is programmable and runs on batteries

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      • #4
        from what i researched this is what I got so far. I first disconnect the thermostat that is directly hooked up to the furnace. I then take a wire from the R Terminal of both thermostat and connect them to the transformer R Terminal. I then take The second wire from the W Terminal of both thermostat and connect them to there own zone valve (red wire). I have 2 red and 2 yellow on each zone valve(Honeywell). I assume the 2 red are hot and the 2 yellow are end switch Wire. I then take the remaining red wire, 1 from each zone valve and connect that to the C terminal on the transformer. I then take the remaining yellow wire from the zone valve and connect them to the furnace were the original thermostat wire was. is this correct or am I wiring it wrong. thanks again for the help.

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        • #5
          any help anyone?

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          • #6
            the zone valves have a small heater inside which opens the valve. the other two wires operate a switch that closes when the valve is open. these two wires go to the burner control which fires up the burner. there is a current rating on the zone valve which you use to set up the heat anticipator on the thermostat.
            one side of the transformer is a common lead, the other, consider a "hot." (low voltage - 24 volt) wiring is such. one red wire on the zone valve to the common. from the transformer "hot" to the thermostat. return from the thermostat to the other red wire. two yellow wires to the TH terminals on the burner control

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