Help with Thermostat wiring

Discussion in 'HVAC Heating & Cooling' started by Recked, Mar 27, 2009.

  1. Recked

    Recked New Member

    Mar 27, 2009
    Hey I was wondering if someone could help me change the thermostat for my boiler. I want to change it from a tekmar 508 to a programable honeywell rth7600. I'm not sure where to attach the wires labeled 5 and 6 with the word Heat under them. The Honeywell has the letters C/G/Y/W/RC/R. RC has a jumper to R. Below is a diagram of my current wireing. Replaced white wires with purple so it would show on diagram.



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