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Hi, you don't have a wire for C, you can only connect to R or it may be RH, and then W1, if that doesn't work you won't be able to use this thermostat unless you run more wires, let me know. thanks Mark
Mark, Again I have used a meter to verify what I have for contacts.
Hi, you can't verify those contacts with a meter.
Mark, w/he set point at 74F Blk lead on "C" Pin 1 and Red lead on pin 2 was open; pin 3 was closed; pin 4 was Open; Pins 5&6 were closed pins 7&8 were open; pin 9 was closed and pin 10 was open.
You have a two wire system, so you will have 24 volts on both wires red and white, when your thermostat calls for heat The C terminal is common and you don't have a common wire present. You can't really check these contacts with a meter because they are triac outputs not your typical relay contact, they need a load on them to make and be able to measure them with a meter.So if you connect to R and W on the thermostat it will work as long as the thermostat is still powered up or on battery power.
when set point was at 73F Pins 5,6 & 9 were closed as before and the rest were open. Pin 3 went open which is what I need to operate the oil fired boiler.
Okay i will try that. Hold please.
You were right. it has fired the boiler.
What UA local are out of? I am out of UA 716 Augusta Maine
yeah I'm not allowed to say, sorry about that.
Okay, Thanks for the help!
no problem, take it easy