The LK flue thermostat can be used to switch on your load unit or primary system pump based on the flue temperature. The probe can take up to 300ºC. Fit the probe a little away from the flue exit of the boiler and if fitted close to a boiler with a rear exit then fit the probe to the bottom of the pipe. There is an offset washer which comes with the stat used to hold the probe a little off the surface of the pipe which helps to stop overheating of the probe. Typically you would set the probe to around 50ºC but of course every boiler is a little different.
If you need further information about this stove, please phone 01803 712143