Very low water pressure on gauge on combi-boiler

keystone

Rochdale_Guy wrote: »

Phew, that was a wasted hour

Anyone help please?

Hold your water! I was making you a nice pic!

Cheers

keystone

On and BTW on your previously posted filling loop image. You can see an NRV on the LHS and isolating valve on the RHS. Just take those off the loop and attach the loop to those already in place on your pipework.

BTW who ever left the loop disconnected was 100% correct. It should not be left connected to avoid the possibility of the iso vv passing and pushing up the pressure to the point where the PRV lifts. You should remove it when you've finished. Don't forget to shut off the iso vv properly or you will get wet.:D.

Cheers

Ectophile

It looks like that particular type of boiler doesn't have the filling loop built in - some do and some don't. You need to look for two taps/valves close to the boiler that don't connect to anything (as in the last poster's pictures, just below the boiler). If they've been capped off, then you'd need to make sure the taps are off and then remove the caps. Then screw on a filling loop.

When (if) you do manage to get the filling loop on, don't open the taps too far, as you could over-pressurise the system. Open one, then just open the other a fraction to let water through. Turn both off once the pressure is right.

Rochdale_Guy

keystone wrote: »

Hoping this isn't asking for trouble here goes:

On this image (only one we need):



Left to right the pipes are:

A CH Flow
B DHW out to taps etc
C Gas In
D Mains Cold In
E CH Return
F Will probably be PRV Overflow
G Condensate Pipe

You can see an isolating valve on an elbow at H on the Cold Mains In and a Non Return Valve on the CH Return at I.

Connect your Filling Loop across H and I. Open iso vv at H to let cold mains in to repressurise and close to stop filling. Pressurise to iro 1 bar with system COLD. You do NOT need to fiddle with the exterior nut in the middle of the NRV at all.

That'll do for the moment.

Cheers

PS Glad you didn't post the pics at full size - bandwidth usage would have been horrendous.

Thanks, so I just need to buy a filling loop and connect it between H and I as you say, here:

http://img707.imageshack.us/img707/4413/59851837.jpg

http://imageshack.us/photo/my-images/221/controlsxngw.jpg/

How do you post a bloody image on here please?!

Rochdale_Guy

keystone wrote: »

On and BTW on your previously posted filling loop image. You can see an NRV on the LHS and isolating valve on the RHS. Just take those off the loop and attach the loop to those already in place on your pipework.

BTW who ever left the loop disconnected was 100% correct. It should not be left connected to avoid the possibility of the iso vv passing and pushing up the pressure to the point where the PRV lifts. You should remove it when you've finished. Don't forget to shut off the iso vv properly or you will get wet.:D.

Cheers

I don't have a filling loop, they didnt leave me one, and that was just a google search image result, not mine! :mad:

Rochdale_Guy

Ectophile wrote: »

It looks like that particular type of boiler doesn't have the filling loop built in - some do and some don't. You need to look for two taps/valves close to the boiler that don't connect to anything (as in the last poster's pictures, just below the boiler). If they've been capped off, then you'd need to make sure the taps are off and then remove the caps. Then screw on a filling loop.

When (if) you do manage to get the filling loop on, don't open the taps too far, as you could over-pressurise the system. Open one, then just open the other a fraction to let water through. Turn both off once the pressure is right.

You mean these two pipes with hexagonal screw caps on? (Close up photo)




Uploaded with ImageShack.us

There is nothing to turn on pipe E, valve I doesn't turn!

.
.
.
.

ian103

what would happen if you just turned iso valve H , wouldn't this repressure the boiler? we had an old ferolli boiler and thats all we had to do

Rochdale_Guy

ian103 wrote: »

what would happen if you just turned iso valve H , wouldn't this repressure the boiler? we had an old ferolli boiler and thats all we had to do

Ha ha! I thought that exactly, but if its that simple, why do Worcester they tell you to do this then?

http://www.youtube.com/watch?v=23vahQHOnGo




.

keystone

Rochdale_Guy wrote: »

You mean these two pipes with hexagonal screw caps on? There is nothing to turn on pipe E, valve I doesn't turn!

Dear me - I knew I was asking for trouble. I said DO NOT TOUCH the exterior nut on the outside of the Non Return Valve I - you do not need to. So LEAVE IT ALONE PLEASE. Sorry to shout but you are not paying attention.

Cheers

keystone

ian103 wrote: »

what would happen if you just turned iso valve H , wouldn't this repressure the boiler? we had an old ferolli boiler and thats all we had to do

Rochdale_Guy wrote: »

Ha ha! I thought that exactly, but if its that simple, why do Worcester they tell you to do this then?

You will get very wet because the filiing loop isn't attached between the isolating valve and the non-return valve. Simples.

Probably (because I can't be bothered to watch the vid) because the vid assumes that the loop is attached? Is this at all possible?

Cheers