Pressure- bar

[localhero]

Hi all new to site, i've removed a 3 rads & replaced them but i only connected 1 with the other 2 closed at the trv's. I've bleed the system which is fine however the pressue gauge keeps dropping to 0.5 after i've filled it up to 1-2 bar i have to refill in order to get hot tap water... thanks

 

[SilentMike]

how long does it take to drop did you cap the trv's they can open

 

[glenno1]

so im assuming you only put 1 back on the wall and the other 2 are just shut valves not connected to any rad

 

[localhero]

Trv's arnt connected & havnt got end caps on pressure drops 20-30mins from 2bar

 

[SilentMike]

well i would cap them for starters even if they haven't leaked yet, any signs of water near the valves?

 

[localhero]

No water capped them off, will refil to 2bar wiil get back.. thanks

 

[AWheating]

any water coming out of the blow off/overflow pipe outside?

 

[localhero]

Awheating : yes when the hot water runs or heating, i just filled up to 2bar turned ho****er tap on (kitchen) went up to 2bar+

 

[gavinwilson]

Try putting 1-1/12 bar cold

sent from my annoying box

 

[localhero]

Not sure wat u mean gavin

 

[SilentMike]

he means only fill heating between 1 and 1 1/2 bar when cold

 

[localhero]

Ok thanks

 

[localhero]

The pessure gauge is still decreasing, i filled it up 1/1 12bar 20mins ago now in the red??

 

[SilentMike]

you didn't drain the heating down with the prv did you?
i know a few who use that trick

 

[localhero]

No just shut the rads of at trv's drained radiator, then connected 1 opened the bleed screw until water came out off it. Other rads arnt connected

 

[SilentMike]

do you know how to reset the prv? I am sure in one of your earlier posts you sad you could see water coming from the pipe out side?

 

[localhero]

Not sure how to do that, water from the overflow when hot wter or heating was turned on

 

[SilentMike]

trace the pipe that goes outside back to the boiler there should be a red valve twist it a little to the right you should here water flow out or not if it is stuck in the open position
then twist it to left till you can't you shouldn't use any force when doing it, sometimes they wont reset but at the rate its dropping you should see an improvement

 

[localhero]

Yeah turned it water came out, the water hasnt been coming out of that pipe it was the plastic pipe but that was just a drip when turning the hot water on!! It loses pressure when idle not when in use!! Could it be that because a rad is disconnected.

 

[SilentMike]

oh dear, you mean the condense pipe? yea its supposed to
its a lot of water to be loosing in a short amount of time should't be that hard to find you did fill all the rads properly and bleed them?

 

[localhero]

Just been around again to double check them, turned heating on & re bled all ok nice & hot doesnt seam like any trapped air blocks..
Thanks for your help

 

[SilentMike]

no problem