Potterton Puma 80 - Low System Pressure

[richg]

I've moved a couple of weeks ago and the low system pressure light has just come on (and stayed on for 24 hrs. now). Any ideas how I can re-pressurise the system? Everything else seems to be in working order.

There are 6 pipes underneath the boiler labelled (left to right): Gas Inlet, Dom HW Outlet, Mains Water Inlet, CH Flow, CH Return, Safety Valve.

There are on/off taps on the CH Flow and CH Return pipes and a tap further down on a pipe leading off the CH Flow pipe labelled bleed valve.

There is a pressure gauge on the bottom of the boiler connected to the Safety Valve which did read about 0.5 bar and now reads 0 bar.

Can anyone help as it's getting colder by the minute and my kettle's working overtime to provide hot water!

 

[breezer]

you need to look for the filling loop (silver braided pipe) you shoulld take the presure up to 1 bar.

search the forums and you will find it.

hint,

try for filling loop, low pressure and my name, as i have posted a picture of mine (and my potty 100e)

 

[ChrisR]

The loop normally goes between the cold water inlet pipe and the Return pipe. It should be removed (but seldom is), so you might have two threaded bits within a foot or so of each other. They COULD be absolutely anywhere, normally under the boiler but I've seen them in the bathroom, the (ex) airing cupboard, and in the loft!

 

[richg]

Thanks, found it and am now thawing out!!

In the end it was a screw valve that I had to twist a quarter turn.