boiller control poterton profile

Hi All,

I have a Poterton profile that seems to do very well but the house is old and there are problems with space heating.

One thing I would like to understand is the purpose of the knob on the front of the boiler and how it should be set.

There are other questions but that is a starter!

Best wishes, Jim

That is the thermostat and controls the output water temp. Setting depends on your system type, ie Gravity hw circulation with pumped heating, or a fully pumped system. Generally I would set it to 4. I just replaced my faithful old Profile and ran it on 4 for 20 years on a fully pumped system and it served me well.

It controls the temperature of the water in your system usually best set at 2/3 to 3/4 and only at max if connected to a thermal store eg Boilermate, or for example if your radiators are undersized and you're having trouble heating a room when it gets really cold outside.
Set to full it represents a flow temperature of 80ºC. People can burn themselves on radiators that are as hot as this You're looking for something like 65-70º as suitable flow temperature in most cases.
On older gravity fed systems with no cylinder thermostat this controls the temperature of the domestic hot water and again 65 - 70 is 'about right' in most cases