Ideal Logic in disguise

[Loki]

Hi Guys

Just after a few pointers not really done a lot of faultfinding on boilers but been too a friends who has a ProCombi Exclusive installed in his house. Which i believe is just an Ideal Logic, he realized that the pressure was dropping around 1 BAR every week. He has kept a keen eye out for leaks etc and no sign.
After a quick visit on the way home the other night i done a few checks like Expansion vessel, the PRV was not weeping and pulled the condensate to see if any water was dripping thought. Are there any other problems it could be in your experience of these boilers?
I have asked him to isolate the boiler on the flow and return to see if it drops over night but have not heard from him yet.

TIA
Rob

 

[Scott_D]

How old is it?
I think vokera use to make a pro combi as well

 

[Loki]

2011 Scott

 

[Scott_D]

Some suffered with a pin holed heat exchanger in the early days.
It might be a leak that only shows when the heatings on

 

[Loki]

The main HEX, that is a heat engine or the DHW HEX?

 

[Scott_D]

Main hex. you can take th burner off and look down inside on the logic