Hi Folks,
I have read a lot of posts regarding operating temperatures and return temperatures, but I still need a bit of help.
My house has oversized radiators and grundfos alpha 2 pump.
I gather from the Grant UK manual that they recommend that the flow should be around 70 degrees and return 50 degrees.
I have tried setting the boiler at its lowest operating temperature and the house heats very well. I have invested in pipe stats to help read the return and flow temperatures. I really don't know if they are working properly as the flow was around 52 and the return said around 35.
The Grant manual states not to run the system with a return temperature of less than 40 degrees. Not really sure why, would this cause problems.
I notice that during the warm up process the boiler produces a good stream of condensate but this eventually slows away down as the system gets up to temperature even at the boilers lowest setting. So going by my pipe stats reporting only 35 degree return I decided to follow the Grant manual and crank up the boilers thermostat so that it would produce a 66 degree flow and 52 degree return (roughly). I noticed that still there was not much sign of any noticeable condensate. Grant tech told me that there should be a steady stream or drips if the boiler is in condensing mode. I assumed it was not and the radiators felt very hot to touch.
Do you think it is better for me to run the boiler at its lowest water temperature as it heats the house well at that setting or would I be better to crank it up and have it firing longer?
The house is well insulated and the boiler is a Grant euroflame 50/70 non modulating condensing model. Our hot water tank is heated by a solar i boost to above 60 degrees regularly so that would not cause any problem running at lower temps. All rads have trvs.
Any advice would be much appreciated. I really want the system to be operating at its peak efficiency and i am willing to try anything, including finding the best way to accurately read the temps of the 22mm copper flow and returns.
Cheers
Ry
I have read a lot of posts regarding operating temperatures and return temperatures, but I still need a bit of help.
My house has oversized radiators and grundfos alpha 2 pump.
I gather from the Grant UK manual that they recommend that the flow should be around 70 degrees and return 50 degrees.
I have tried setting the boiler at its lowest operating temperature and the house heats very well. I have invested in pipe stats to help read the return and flow temperatures. I really don't know if they are working properly as the flow was around 52 and the return said around 35.
The Grant manual states not to run the system with a return temperature of less than 40 degrees. Not really sure why, would this cause problems.
I notice that during the warm up process the boiler produces a good stream of condensate but this eventually slows away down as the system gets up to temperature even at the boilers lowest setting. So going by my pipe stats reporting only 35 degree return I decided to follow the Grant manual and crank up the boilers thermostat so that it would produce a 66 degree flow and 52 degree return (roughly). I noticed that still there was not much sign of any noticeable condensate. Grant tech told me that there should be a steady stream or drips if the boiler is in condensing mode. I assumed it was not and the radiators felt very hot to touch.
Do you think it is better for me to run the boiler at its lowest water temperature as it heats the house well at that setting or would I be better to crank it up and have it firing longer?
The house is well insulated and the boiler is a Grant euroflame 50/70 non modulating condensing model. Our hot water tank is heated by a solar i boost to above 60 degrees regularly so that would not cause any problem running at lower temps. All rads have trvs.
Any advice would be much appreciated. I really want the system to be operating at its peak efficiency and i am willing to try anything, including finding the best way to accurately read the temps of the 22mm copper flow and returns.
Cheers
Ry