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Thermostat for power to open and close zone valves Series 20 Wiring - Boiler System
slg04012
Member Posts: 17
in Gas Heating
Looking for a thermostat compatible with a power to open and close zone valves (Series 20) boiler system that I can buy in a store immediately.
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Comments
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Honeywell T6 Pro.
Now hurry. Go go go!0 -
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The Supply House has something. Focus-Pro series.
I know the old tstats are gone but FWIW, I am looking at a T87F 2873 here.
It has 3 wire connections going into the Hg bulb.
SPDT switch. Typically for me that is heating on one set of contacts and AC the other. Would this have run the Series 20 system? I have seldom dealt with one.
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That may be the one the OP chucked.... yes it would have. Kind of a rare bird, even back in the day.JUGHNE said:The Supply House has something. Focus-Pro series.
I know the old tstats are gone but FWIW, I am looking at a T87F 2873 here.
It has 3 wire connections going into the Hg bulb.
SPDT switch. Typically for me that is heating on one set of contacts and AC the other. Would this have run the Series 20 system? I have seldom dealt with one.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 -
Sorry I have no idea what the big box stores offer. Why the emergency? www.supplyhouse.com0
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You may overheat the house but the system should shut down on high limit. How about just warming the house up and then shutting the power switch off0
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Thanks for the great discussion. Found this LUX TX9600TS that is compatible, so will be trying that out tonight0
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Thank you so much everyone. This conversation really helped me to figure things out. Was able to go to Lowe’s and find an affordable LUX TX500Uc 5/2 Day universal thermostat, compatible with a hot water heating 3 wire zone valve. Installed two (one for each zone) and they function perfectly! Each unit was reasonably priced. It turns out my white wire was common (terminal Rh), red wire was open (terminal W1) and green wire was close (terminal A).
In case this helps anyone else in the future, 5 terminal on my zone valve connected to terminal Rh on this t-stat, terminal 6 on my zone valve connected to the A terminal on this t-stat, and terminal 4 on my zone valve connected to terminal W1 on this t-stat.0
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