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Control wiring for Potterton/honeywell heating system


Markiemarque

Question

Hi,

A customer has reported a problem with their Potterton boiler - on return from holiday the water takes too long to heat up as the boiler keeps switching off/on, rather than heating the tank continually until the water is the correct temperature.

The PCB has been replaced previously so the control wiring is suspected.

I am not really up to speed with how boiler circuits are wired so would anyone who has wired one of these take a look at my attached wiring diagram and let me know if it's correct .... I (hopefully have captured the data correctly Blushing)

Thanks

Mark

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6 answers to this question

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Thanks for the ideas. The problem actually occurs whenever the customer has any time away.

I have enrolled for the Honeywell one day course (

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Thanks for the ideas. The problem actually occurs whenever the customer has any time away.

It has been known for boilers to get jealous.

Next time they go away they will have to take it with them...................

:D

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It has been known for boilers to get jealous.

Next time they go away they will have to take it with them...................

:D

You are mad.

:^O

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it could be a problem with the boilers internal Tstat, or if not the cylinder stat or motorised valve my be faulty.It may be possible to listen to the valve and find out if its operating when the boiler is switching on and off.If not it is probably a boiler fault.

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