RT300 Salus Thermostat

Discussion in 'Engineers' Talk' started by chloe scott, Nov 24, 2018.

  1. chloe scott

    chloe scott New Member

    we have one of these wireless thermostats, and it is broken. The batteries rusted in the back and we have replaced them and it will not turn on. The receiver box is showing a red light, the normal green light is not on. We have tried to reset and turn thing off and on.

    We don't usually use the thermostat at all and so I am not sure why it is making such a difference now, as we hadn't 'set it'

    We have hot water, but radiators won't come on. If we order a new thermostat it's going to be at least 3 days until delivered.

    Does anyone know how we can override the thermostat and just get our combi worcestor bosch boiler to turn on manually until we get the thermostat working again? It's a 30si NKiv boiler - not sure if that helps

    thanks in advance
  2. Allsorts

    Allsorts Super Member

    Are there any controls/switches on the receiver?

    Have you looked up the op instructions on-line to see if the receiver can be switched manually?

    Does the boiler have a timer or any other controls on it?
  3. MGW

    MGW Screwfix Select

    In the main the thermostat is an extra, and when the boiler comes there is a bridge wire which you have to remove to fit thermostat, so likely the bridge could go back in, and you can simply turn boiler on/off at the boiler.

    There are two reasons for a thermostat, one is control an area temperature, normally a room, and second is to stop the boiler from cycling when the demand is low.

    The combi modulating condensing boiler needs to have thermostatic radiator valves (TRV) for most applications which control the boiler output by how hot the return water is, depending on quality of TRV heads there is often no need for a thermostat to control boiler in the Winter, however unless you manually turn it off in the summer it will keep firing up to test if needed or not, so a thermostat in a little used room like the hall, stops this cycling.

    But you can get modulating thermostats which actually control output of boiler, not simple on/off but gradually turns it down or up, these are either put in main room, or linked the the TRV heads.

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