Installing two Honeywell RTH8580WF1007-W thermostats for a 2-zone system that has a heat pump with oil furnace backup (oil furnace provides hot water coil to air handler). The existing thermostats (2 different models) are wired to a zone panel (EWC Controls Model BMPlus 3000).
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Existing Zone 1 thermostat was wired as follows (Zone Box Terminal > Wire Color > Exist. Thermostat Terminal): C > Blue > C, W1 > White > W1, Y > Yellow > Y, R > Red > R, G > Green > G, EM > Pink > L. The exist. thermostat does not have wires on terminals B & O, but has a jumper between terminals W1 & E.
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I had wired the Honeywell RTH8500 as follows (Zone Box Terminal > Wire Color > NEW Thermostat Terminal): C > Blue > C, W1 > White > O/B, Y > Yellow > Y, R > Red > R, G > Green > G, EM > Pink > L. The new thermostat does not have wires on terminals E/Aux & K, but has the jumper between terminals R & RC.
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I believe there should be a wire on the new thermostat terminal E/Aux. Should the current EM > Pink > L be changed to EM > Pink > E/Aux?
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What about the jumper on the exist. thermostat between terminals W1 & E? How do I address this on the new thermostat, if at all?
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Existing Zone 2 thermostat was wired as follows (Zone Box Terminal > Wire Color > Exist. Thermostat Terminal): C > Blue > C, W > White > W, Y > Yellow > Y, R > Red > R, G > Green > G. The exist. thermostat does not have wires on terminals B & O, but has a jumper between terminals RH & RC.
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I had wired the Honeywell RTH8500 as follows (Zone Box Terminal > Wire Color > NEW Thermostat Terminal): C > Blue > C, W > White > O/B, Y > Yellow > Y, R > Red > R, G > Green > G. The new thermostat does not have wires on terminals E/Aux, L, & K, but has the jumper between terminals R & RC.
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I do not have any questions on the Zone 2 thermostat.
Honeywell RTH8580WF1007-W and BMPlus3000
Re: Honeywell RTH8580WF1007-W and BMPlus3000
I belive you have an older BMPlus-3000. On the processor there will be a label that say BMPlus 3000 ver??? let me know what version it is.