For this I need help from the big boys here. Reason for posting here is so the customer can read the response, so keep it clean please. They have been advised to power flush etc but am sure the suggestions are without foundation.
Clamped flow and return at the boiler to clock 90 degrees at the flow and 40 at the return. Radiator that is tepid has about 48 at the inlet and Return at 33. Another rad inlet about 45 and 28 return.
Moved the clamp from the return to the flow about 450mm down stream of first clamp. Across 450mm of pipe, temperature drops 10 degrees.
Cylinder is a primatic one, but it is pumped. Also has gate valve ( for isolation/ balancing?), hope no one closes these as then we have a big pressure cooker with no relief valve. Inlet to cylinder was about 48 degrees
Some radiators are stone cold. There are 10 radiators. Rooms have high ceilings (10foot) and rooms are big, not modern Wendy house rooms that are just big enough for a bed.
Pump is a Wilo 50 (5m head pump?). Flow is 28mm, return 22mm
Auto air valve is a Honeywell unit that could be rotated by hand as capnut was slack. Air ingress problem?
Timer wired as gravity system BUT for hot water boiler fires and pump runs.
For CH, one would expect there is a motorised valve some place that opens the zone to rads but that is something that needs to be located and looked at.
Am I correct when I say primary to cylinder should not be pumped. If flow from boiler is at 90 degrees, flow into cylinder should also be a similar temperature ( same for radiators). Am suspecting a motorised valve somewhere but cannot understand reason for low inlet temperature to cylinder
Clamped flow and return at the boiler to clock 90 degrees at the flow and 40 at the return. Radiator that is tepid has about 48 at the inlet and Return at 33. Another rad inlet about 45 and 28 return.
Moved the clamp from the return to the flow about 450mm down stream of first clamp. Across 450mm of pipe, temperature drops 10 degrees.
Cylinder is a primatic one, but it is pumped. Also has gate valve ( for isolation/ balancing?), hope no one closes these as then we have a big pressure cooker with no relief valve. Inlet to cylinder was about 48 degrees
Some radiators are stone cold. There are 10 radiators. Rooms have high ceilings (10foot) and rooms are big, not modern Wendy house rooms that are just big enough for a bed.
Pump is a Wilo 50 (5m head pump?). Flow is 28mm, return 22mm
Auto air valve is a Honeywell unit that could be rotated by hand as capnut was slack. Air ingress problem?
Timer wired as gravity system BUT for hot water boiler fires and pump runs.
For CH, one would expect there is a motorised valve some place that opens the zone to rads but that is something that needs to be located and looked at.
Am I correct when I say primary to cylinder should not be pumped. If flow from boiler is at 90 degrees, flow into cylinder should also be a similar temperature ( same for radiators). Am suspecting a motorised valve somewhere but cannot understand reason for low inlet temperature to cylinder
