Identify a thermostat
- Thread starter hhf
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- thermostat
Looks like a Sunstone Touchstat
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- Llanfair Caereinion, Nr Welshpool
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It says sensor NTC10K (can be extended to 50m) and 16 amp rating so could power electric heating, including under floor, there are three types of under floor heating, water and the second pump circulates the water keeping the temperature to within limits normally 27°C, chemical electric the chemical increases resistance as it warms up, so again keeps floor temperature to around 27°C, and simple resistive electric which requires a pocket with a remote sensor to ensure the floor does not exceed 27°C and it seems the thermostat @mcprinter has linked to has the option to use a sensor.
The old idea was to fit a wall thermostat to a lower floor room, normally kept cool so it turns off faster when warm weather arrives, with no outside door, or alternative heating, most homes no such room, so some compromise required.
But the idea of the wall thermostat was not to control the room temperature, but to stop the boiler cycling, off/on when warm weather arrives, the TRV sets the room temperature. At least with standard radiators. So it would make sense with UFH to have a local thermostat for the room connected to the activator (looks like a TRV) to control room temperature.
In theory with a modern boiler you don't really need a wall thermostat, it would work OK without one, and the user can switch it off in summer months, it works using the temperature of the return water, but unless boiler is running it can't use the return water, so the boiler would need to keep firing up every few hours to test if needed, so normally a wall thermostat is fitted in the hall.
The old idea was to fit a wall thermostat to a lower floor room, normally kept cool so it turns off faster when warm weather arrives, with no outside door, or alternative heating, most homes no such room, so some compromise required.
But the idea of the wall thermostat was not to control the room temperature, but to stop the boiler cycling, off/on when warm weather arrives, the TRV sets the room temperature. At least with standard radiators. So it would make sense with UFH to have a local thermostat for the room connected to the activator (looks like a TRV) to control room temperature.
In theory with a modern boiler you don't really need a wall thermostat, it would work OK without one, and the user can switch it off in summer months, it works using the temperature of the return water, but unless boiler is running it can't use the return water, so the boiler would need to keep firing up every few hours to test if needed, so normally a wall thermostat is fitted in the hall.