I have two issues which I think are quite separate:
1. I have a Netaheat 16/22 Potterton boiler which is heating the system but has a firing-up anomaly. When the system requires the boiler to start / fire-up the following happens;
(i) the boiler fan comes on OK
(ii) in one click the ‘pilot’ fires-up OK
(iii) in a big click the burner fires-up, then sometimes there is an immediate click again and the burner flames rapidly rise and fall (oscillate) with repeating clicks, the burner flame never quite goes out and after a few clicks everything seems to run normally.
2. I have a Grundfos Type 15-50 130 circulator pump. When the system is just heating the stored water it seems the pump continues to run for ages after the boiler has stopped (I haven’t measured the time, but could easily be 30mins – maybe more), and continues even if I manually turn the hot-water heating off at the control panel by the boiler. However, if I manually get the radiator heating to come one, even if just very briefly, and then turn off the radiator heating – the circulator pump stops as expected.
Immediately after the pump there is a Honeywell valve at a T junction to switch between (a) the radiator system and (b) the stored hot water. Then on the pipe branch (b) there is another Honeywell valve, this time simply in-line, immediately before the mains-pressure hot water tank.
I would be most grateful for any questions, prognosis or suggestions please.
Many thanks in anticipation.
1. I have a Netaheat 16/22 Potterton boiler which is heating the system but has a firing-up anomaly. When the system requires the boiler to start / fire-up the following happens;
(i) the boiler fan comes on OK
(ii) in one click the ‘pilot’ fires-up OK
(iii) in a big click the burner fires-up, then sometimes there is an immediate click again and the burner flames rapidly rise and fall (oscillate) with repeating clicks, the burner flame never quite goes out and after a few clicks everything seems to run normally.
2. I have a Grundfos Type 15-50 130 circulator pump. When the system is just heating the stored water it seems the pump continues to run for ages after the boiler has stopped (I haven’t measured the time, but could easily be 30mins – maybe more), and continues even if I manually turn the hot-water heating off at the control panel by the boiler. However, if I manually get the radiator heating to come one, even if just very briefly, and then turn off the radiator heating – the circulator pump stops as expected.
Immediately after the pump there is a Honeywell valve at a T junction to switch between (a) the radiator system and (b) the stored hot water. Then on the pipe branch (b) there is another Honeywell valve, this time simply in-line, immediately before the mains-pressure hot water tank.
I would be most grateful for any questions, prognosis or suggestions please.
Many thanks in anticipation.