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- 24 Jan 2021
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Looking for help/tips from an expert who knows how to diagnose/suggest tips to get the most out of my boiler. Greenstar 40CDi conventional.
I have mostly ufh now in all rooms, though some circuits are not yet connected. I have a sealed HWC attached too (not a system, just sealed)
when the HWC calls all is fine. Boiler comes on, stays on, until HWC is satisfied. Then the issues start. I know this is a familiar story....
when I had rads it was fine. Boiler worked ok. But I know that ufh circuits are different and I’ve read many have the issues I have. The boiler just cycles when it’s just ufh calling.
the flow from boiler is, for example:
boiler temp shown: 70
Flow 50 (measured with infrared on black tape on copper)
Return is 33 (measured using same approach as flow)
My question: is it the temp differential causing it to cycle OR is it a flow problem (due to restriction of flow in ufh circuits)
or is it something else?
the house is a large 5 bed detached with big rooms
note when the HWC and UFH are calling here are the temps
Boiler shows: 83
Flow: 57
Return: 38
and the boiler stays on (no cycling) until hwc is heated.
I have mostly ufh now in all rooms, though some circuits are not yet connected. I have a sealed HWC attached too (not a system, just sealed)
when the HWC calls all is fine. Boiler comes on, stays on, until HWC is satisfied. Then the issues start. I know this is a familiar story....
when I had rads it was fine. Boiler worked ok. But I know that ufh circuits are different and I’ve read many have the issues I have. The boiler just cycles when it’s just ufh calling.
the flow from boiler is, for example:
boiler temp shown: 70
Flow 50 (measured with infrared on black tape on copper)
Return is 33 (measured using same approach as flow)
My question: is it the temp differential causing it to cycle OR is it a flow problem (due to restriction of flow in ufh circuits)
or is it something else?
the house is a large 5 bed detached with big rooms
note when the HWC and UFH are calling here are the temps
Boiler shows: 83
Flow: 57
Return: 38
and the boiler stays on (no cycling) until hwc is heated.