Pressure loss on unvented system with ideal logic boiler advice required

[Craggy]

hi. bit of an update,

there are two pressure gauges on the system. one is upstairs besides the tank, the other is under the boiler literally attached to/part of the "flow" tap on the left underside of the boiler.

this is the part of the test still whereby the flow and return to the boiler is closed off. both gauges seem to be dropping in sync with each other, i suspect one is a bit more accurate than the other.

start of test approx 1.5 bar.


8 HOURS INTO TEST – UPSTAIRS PRESSURE 0.9 BAR, DOWNSTAIRS 1.05 BAR


22 HOURS UNTO TEST – UPSTAIRS PRESSURE 0.75 BAR, DOWNSTAIRS 0.9 BAR


what does this indicate, boiler or system?

thanks

 

[kidgreen61]

System, I'm fairly certain that the Logic gauge isn't isolated from the system pressure when the iso valve is closed.