Just starting winter in our new house. CH system has a Honeywell ST9400C programmable controller and where the Thermostat is there is a Siemens REV 22 controller. Both these controllers are programmed to time (and a max temp) All Rads have Thermostatic valves.
What I would like is a programmer that can be set to drive the boiler on Thermostat Temp eg switch off at say 21 deg and switch on at 17deg. Is there such a device available and where do I get one from? I've searched a bit but not found anything, if they are not available why not, these sort of controllers are widely available in industry?
What I would like is a programmer that can be set to drive the boiler on Thermostat Temp eg switch off at say 21 deg and switch on at 17deg. Is there such a device available and where do I get one from? I've searched a bit but not found anything, if they are not available why not, these sort of controllers are widely available in industry?