I have manually operated mercury bulb type thermostat, make YORK(honeywell), model T834C in my home. It is two stege heat and one stage cool thermostat(multi stage). It has 6 wires , Red two, Yellow two, white two. The terminals where the wires are connectd are not marked. 3 wires(R,Y,W) are soldered to mercury bulb, one white is soldered to a dial, one Red wire and one white wire are screwed on terminals not marked.How to assign terminal codes to these 6 wires for connecting to new thermostat?
I want to replace it with a Honeywell programmable Thermostat, 5-2 or 5-1-1 or 7 day programmes, which is easy to install. What is the model suitable for replacement of T874C thermostat?
If any one has done the replacement of T874C with a programmable one, please advise.
Honeywell customer support is requested to give me the answer.
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