Question about pressure on a Baxi 105 He Instant ?????

[sie1uk]

Hi, please can some one give me an indication of what presure should be in the E/Vessel when the boiler is cold ? i see some people say 1bar, some say 0.5 bar, i just changed the Pressure relief valve as i was losing a little water through the pipe, i checked the P/Vessel and it had 0.5 bar in it no water came out when i pressed the valve so i assume the vessel is still ok. Pressure on the gauge of the boiler shows 2 bar when hot, drops a little to 1.7 ish when hot tap is on then back up when turned off, does this sound about right ?????

cheers

SIe

 

[Gobo]

Between 0.5bar to 1 bar cold is pretty standard.

Sounds like it's running okay to me.

 

[sie1uk]

Ok further update, had the boiler off for around 2 hrs until totaly cold, reading on boiler shows 1bar, vessel just below 1 bar, powered back up and once warm shows 2 bar, please some one reassure me that this is all sounding ok !

cheers
sie

 

[holty]

2 bar hot is about the norm, even above is ok.but testing an expansion vessel while the boiler/system is under pressure isnt.to test an EV. the boiler/system has to be drained down.otherwise your reading the system pressure if you EV is knackered.

 

[sie1uk]

Thanks, to drain it down can i just use the prv ? until no further water comes out ?

 

[holty]

better to use the boiler drain off

 

[holty]

dont think youd need the info to drain down, to check EV pressure though.2 bar is normal when hot.

 

[sie1uk]

But if i wanted to drainit down, how would i do it ?

 

[bengasman]

From a drainpoint, never from the prv

 

[twgas]

But if i wanted to drainit down, how would i do it ?

cross that bridge when you get to it.
From the info you've given your system appears to be set up alright, don't go messing with bits and risk upsetting it - if it's not broken don't fix it!

 

[sie1uk]

Cheers, Words of wisdom !

Boiler running fine for last week, so can relax now ! no more 'wanting' to get my hands in and have a mess.