Need lesson on pipe thermostat

[Billybjo]

I have a gledhill boilermate II system. I thought I'd finally worked out how it all functions, but the pipe thermostat has now confused me.

It has a small pipe thermostat labelled as Sopac with a dial from 30-90 degrees on it. This is connected to the boiler flow and heating pump PCB.

I thought it was to ensure against overheating by switching on the rads when the thermal store temp got too high (by sensing the temp in the boiler flow pipe).

However when I set it high (i.e. 80 degress) the rads don't come on even if the room stat is turned very high. They only then come on when I turn the Sopac unit down to about 60 degrees.

Can anyone explain how this pipe thermostat should work and what the ideal setting on it should be?

 

[cider]

I have a gledhill boilermate II system. I thought I'd finally worked out how it all functions, but the pipe thermostat has now confused me.

It has a small pipe thermostat labelled as Sopac with a dial from 30-90 degrees on it. This is connected to the boiler flow and heating pump PCB.

I thought it was to ensure against overheating by switching on the rads when the thermal store temp got too high (by sensing the temp in the boiler flow pipe).

However when I set it high (i.e. 80 degress) the rads don't come on even if the room stat is turned very high. They only then come on when I turn the Sopac unit down to about 60 degrees.


Can anyone explain how this pipe thermostat should work and what the ideal setting on it should be?

the stat your adjusting is pos thermal store stat so wont let rads run cus your setting it higher then boiler stat