4 bar pressure. Should I turn it on?!!

[kkelly77]

I had an issue with frozen pipes for the CH the last few days. Repaired a burst outside pipe and re-insulated it which seems to have thawed the freeze.

However the pressure gauge on my boiler which normally reads just under 1 bar is now at it's max, 4 bar!!! Should I turn on the CH with the pressure this high? Or should I drain off some water in the CH system?

Need to get the heating going while I have the chance. Thanks.

K

 

[Blake]

Have you left the filling loop open? Twist the red part to release some of the pressure in the system, I would expect water to have been discharging out of the Pressure relief pipe if that is a true reading. Anything over 3 bar and that valve with the guage on should open up to release the pressure outside.

 

[gasmarc]

dont touch the red valve, drain some water of via a rad to 1 to 1,5 when cold and that will be ok

 

[hihowudoin]

at the end of the day, the pressure relief valve is not operating as it should and requires replacement (safety device). as previously stated they are usually set to 3 bar.

 

[kkelly77]

Only as soon as I posted my original message, I check the pressure valve again only to find it back to 0 again.

Unfortunately I found another burst pipe after some investigation. Replaced burst section and did my best to re insulate. Have a blower heater on the pipes at the moment. Gauge still reading 0.

 

[cjg]

when all done check for all and any more leaks , then i would take it up to only 1 bar cold, run on low temp. for 1 hour and keep an eye on things , if ok, then up to 1.5bar (only if you have run it at very low temp/min.) see how you go from there but it should not get up to or near 3bar. if it does it then can and will be dangerous.

regards,
merry xmass.

 

[kkelly77]

Still no luck with the blower heater. Gauge at 0 and hasn't budged. Pipes could be frozen anywhere, especially seeing as they go underground and I have no idea where they are routed. Looks like it'll be a chilly Christmas morning.

HAPPY CHRISTMAS ALL!!!!

 

[hihowudoin]

gotta ask the question even though it should be obvious, but, have you actually tried re-pressurising the system via filling link ?

 

[kkelly77]

gotta ask the question even though it should be obvious, but, have you actually tried re-pressurising the system via filling link ?

No. It's a vented system so any time I've had to drain it before I just let the header tank refill and that would take it back up to ~1 bar

 

[cjg]

hi there , just try a little in see if you get any where , see if you get a reading on gauge . would hate to think no heating x mass, we try to keep a eye on here if i can but got guess"S here !! good luck

 

[Billy Bob Bob]

No. It's a vented system so any time I've had to drain it before I just let the header tank refill and that would take it back up to ~1 bar

if you have a expansion vessel heating side is sealed system probably domestic side vented

 

[kkelly77]

if you have a expansion vessel heating side is sealed system probably domestic side vented

You would be correct there Gas Man.

As I'm new to the plumbing game, whats the differnce between the two? Water from outside into house is sealed and water from the house to outside is vented?

 

[Billy Bob Bob]

sealed system(ch) filled from mains/filling loop thats why you have a expansion vessel replaces feed and expansion tank on (ch) system, dhw side (cylinder) fed from traditional cwsc (cold water storage cistern) ie a tank in the loft