Best to ask here or ?
My gas furnace is a Holly. It has an old mercury two wire thermostat.
I want to change the thermostat so that I can set the same two temperature ranges, day / night, for every day.
I do not understand thermostats.
The local store does not know how to advise me.
Thermostat suggestions please and maybe a little tutorial.
It would be nice to know the open voltage and the switch current when closed. Around 24 volts any ordinary programmable thermostat unit might do.
There are (or at least were...) plenty of thermostats with multiple settings that followed the time of day and used a battery to operate the clock, hence could be hooked up to a basic two-wire control system and not worry about wiring for power.
Just an idea: you can use two thermostats and mechanical 24 hour timer to switch them. Something like that:
------ With Best Regards, Evgeniy
I need to buy on-line. Any model numbers ? What terminology do I look for ?
Please help.
danny burste>
Almost any 'smart' thermostat can do a daily fallback, but this does mean it's a display-and-buttons-and-clock elaborate item. Honeywell is a big manufacturer, their web site should give you some ideas
Look at a few, and maybe check out the manuals online.
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