Boilermate 2 Primary return to heat generator?

[N8FAN]

Hi.
I have a Boilermate II. There is a pump attached to the primary return to heat generator pipe that is always running. It is set to its highest setting, 3. What does this do and can I turn it down to 2 so it runs quieter? There is a second pump attached to another pipe close to it which is also set to 3 but does not appear to be always running/as noisy. Any advice welcomed.

Thanks
Nathan

 

[Gorners]

The primary pump is the one that runs when the boilermate calls for heat from the heat source. So essentially, for some reason either the boilermate thinks that the stored water is not up to temperature and hence not shutting off the pump, or the pump is not being told to turn off even though temperature has been achieved. Is the stored water getting up to temperature?

The second pump is the one which circulates the hot water round your radiators, so this will come on when your thermostat calls for heat. I wouldn't turn down either pump setting especially the primary one as it's likely the water will overheat and you get some scary noises as it vents to the header tank it certainly won't cure your problem.


Chances are either the delay timer PCB needs changing, or the temperature sensor. There's some simple fault finding you can do on the PCBs if you check the manual to see if they are operating properly.