My son has just bought his first house - has a Ravenheat 780 CSI(T)AAA combi boiler. with RHVT 2 wireless thermostat.
He is complaining that pressure on boiler gauge is fluctuating sometimes at 0.5 bar then when hot it can be 1.5 or even as high as 3 bar.
Plus he says it is often noisy, and sometimes sounds like water running/filling inside boiler, plus although temp control set to 21 degrees (wirless stat) house only gets to 17 degrees and boiler shuts off.
I did bleed the rads and checked wireless stat is correct day/time and programmed for sensible on/off periods.
The main index rad takes ages to get warm, even reducing lockshields on the other rads, and having this one wide open it take a long time to get hot ........... maybe just poor system design.
Only time it will warm up quickly is if you crank all the other rads closed (did it for a test)
Variable head pump is on max speed.
The wireless stat works on 21 degree 'demand' and 17 degree night modes, there is no loss of comms alarm.
Any tips what to look for for combi issues ? ..... never owned a combi.
I have not checked pressure vessel intend to do that tomorrow - if no water coming out of schrader valve can I set pressure with air pump without draining down ? any tips on that.
He is complaining that pressure on boiler gauge is fluctuating sometimes at 0.5 bar then when hot it can be 1.5 or even as high as 3 bar.
Plus he says it is often noisy, and sometimes sounds like water running/filling inside boiler, plus although temp control set to 21 degrees (wirless stat) house only gets to 17 degrees and boiler shuts off.
I did bleed the rads and checked wireless stat is correct day/time and programmed for sensible on/off periods.
The main index rad takes ages to get warm, even reducing lockshields on the other rads, and having this one wide open it take a long time to get hot ........... maybe just poor system design.
Only time it will warm up quickly is if you crank all the other rads closed (did it for a test)
Variable head pump is on max speed.
The wireless stat works on 21 degree 'demand' and 17 degree night modes, there is no loss of comms alarm.
Any tips what to look for for combi issues ? ..... never owned a combi.
I have not checked pressure vessel intend to do that tomorrow - if no water coming out of schrader valve can I set pressure with air pump without draining down ? any tips on that.