Oil Heatslave Pressure problem

[BrynRovers]

Just had my Heatslave 20/25 oil boiler serviced.

Everything is OK except the system pressure, starting off from cold at just below 1 Bar but when system (heating) is up to temp the pressure has risen to just below 3 Bar.

Checked the expansion tank and that seems fine with a pressure of 1 Bar and no water from the schrader valve.

One thing though is that the expansion tank pressure stays at 1 Bar even when the system pressure is up to 3 Bar.

I am wondering whether the pipe from the boiler to the expansion tank could be blocked.

Any suggestions guys (or gals).

Bernard

 

[wiss]

Hi, i take it when you have checked the vessell pressure there was no system pressure and the prv was open?? also check the braided line to the vessell is not kinked.

 

[BrynRovers]

Pressure was checked when I drained some of the system to give me no pressure on the boiler gauge.

With 0 pressure on the boiler gauge, the vessel pressure shows just under 1 bar.
With 3 bar (or near enough) on the boiler gauge, the pressure vessel still shows just under 1 bar.

That is what makes me suspect the flexible between the vessel and the boiler.

 

[Boilerman2]

Buy a new flexible it is VERY common for these to block and they can't be cleared

 

[BrynRovers]

Will do that and report back.

Thanks a lot.