Naw. Morphine and beer watching the football is a bad thing. I'm better noo
Good man.
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Honeywell Evohome Fitting
- Thread starter michallem
- Start date
Good man.
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I have connected live from pump to LP on boiler and left orange from valve on switched live (LR) on boiler. When fired heating up, pump didn't start at all, boiler started making funny bubbling noises, blue light started flashing 30s after switching heating on and I've turned everything off.
Surely that's not right
Edit:
On my original wiring, pump overrun does not work in did. Pump switches off as soon as wireless relay box is switched off.
But on revised wiring pump does not switch on at all.
Is it possible it's got something to do with pump N on boiler is not not connected?
Surely that's not right
Edit:
On my original wiring, pump overrun does not work in did. Pump switches off as soon as wireless relay box is switched off.
But on revised wiring pump does not switch on at all.
Is it possible it's got something to do with pump N on boiler is not not connected?
Last edited:
Where, exactly, is the blue light coming from?
Sounds as if the pump overrun controller in the boiler is kaput. You need a Gas Safe Registered engineer to carry out the repair.
Can't explain why, with original wiring, the pump continued after heating went off. There will still be a voltage on the orange, but only 50-100V, so it shouldn't be enough to run the pump. The only other source is B terminal on the HW relay, but this should only be live when HW is called.
Incidentally, HW relay B terminal still needs to be connected to LR, as well as wire from valve orange.
Sounds as if the pump overrun controller in the boiler is kaput. You need a Gas Safe Registered engineer to carry out the repair.
Can't explain why, with original wiring, the pump continued after heating went off. There will still be a voltage on the orange, but only 50-100V, so it shouldn't be enough to run the pump. The only other source is B terminal on the HW relay, but this should only be live when HW is called.
Incidentally, HW relay B terminal still needs to be connected to LR, as well as wire from valve orange.
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Aren't they contradictory statements?
A flashing blue light indicates a boiler fault. You need a GSR engineer to sort it out.
A quick update. One wire has become loose while mounting wireless box to the wall and that was the reason why pump was not turning on. Now boiler runs perfectly and pump overrun works as well and haven't seen flashing blue light ever since.
Maybe it could be of any use to someone else with similar setup, below is my final wiring (Y plan with pump overun). Finally I connected live from boiler to the right L inside HTG and live from 1 to the left L inside HTG (as per honeywell instruction for boiler with pernament live connection)
Maybe it could be of any use to someone else with similar setup, below is my final wiring (Y plan with pump overun). Finally I connected live from boiler to the right L inside HTG and live from 1 to the left L inside HTG (as per honeywell instruction for boiler with pernament live connection)
Useful diagram. I created something similar which might be handy for someone who's fitting HR92s to all radiators in an S-plan system (i.e. motorised valve locked open).
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