Promax Combi HE Plus

[Cavvie]

Hi
My Pressure Gauge is giving me grief it’s rising on its own goes down to 0.8 and then rises to 1.4 bar where it currently is the heating is not currently being used and no hot water has been used for a few hours. Does the gauge need re placing.

 

[SJB060685]

Although a dodgy gauge could be the culprit, I suspect its one of a couple of other possibilities. You need to find a qualified engineer to check out for you.

 

[Aquarius]

Check to make sure your filling loop is turned off fully, if it is and it’s connected it could be passing.

 

[Cavvie]

Although a dodgy gauge could be the culprit, I suspect its one of a couple of other possibilities. You need to find a qualified engineer to check out for you.

Thank you for the reply
[automerge]1593115104[/automerge]

Check to make sure your filling loop is turned off fully, if it is and it’s connected it could be passing.

Thanks for the response I have checked the loop and its turned off as far as it will go

 

[SJB060685]

If you only have one filling loop (I have seen multiple) and can be sure its not letting by then i would investigate the PHX, if that has failed then the system side will charge to whatever static pressure your cold mains is, or at least try to but the boiler PRV might intervene if higher than 2.5-3.0 bar.

 

[ShaunCorbs]

Hot water pre heat ?

 

[SJB060685]

Hot water pre heat ?

Is this a storage combi mate?

 

[Aquarius]

Is this a storage combi mate?

It doesn’t need to be. Take the Vaillant Ecotec pro range, has preheat, but not a storage combi.

However I don’t think these have a preheat/warm start function.

 

[Cavvie]

It doesn’t need to be. Take the Vaillant Ecotec pro range, has preheat, but not a storage combi.

However I don’t think these have a preheat/warm start function.

No mine has no pre heat