Central heating - radiator off, no hot water

[User]

 

[Mark Grant]

There should be a filling loop somewhere, usually under the boiler. A braided hose with a valve at one or both ends.
Open up the valves until the pressure guage reads 1.5 bar then shut them again.

Then just check that the rad valves are fully shut off, they can sometimes 'let by' even when turned off tight.

 

[Mark Grant]

Pressure shouldn't drop if valves are turned off before rad is removed, but as I added in my edit, valves can leak a bit and pressure may have been lost since removal.

 

[raleighnut]

[QUOTE 5232179, member: 45"]Thanks. Do I need to check anything else first though or is it normal for the pressure to drop right off when a rad is removed?[/QUOTE]
They may have had to drain the whole system down to a point where that rad was empty before removing it, if unsure about plumbing then leave it alone until the work is complete.

 

[I like Skol]

The bit you need to fiddle with is off the front of your picture, probably under a grey plastic cover. Better left alone if you don't know what you are doing.

 

[subaqua]

[QUOTE 5232192, member: 45"]These are the pipes...[/QUOTE]

the filling loop usually goes between a stabbing on the cold water inlet and the Return for the heating . if you can take a picture of a bit lower on the pipes as it seems to show a valve on the return

 

[Slick]

Like others have said, it's a simple fix but if your not sure leave it to the builder but make sure you get him to show you as it's fairly common for a system to need topping up every few months so.

 

[mjr]

1. read the flipping manual for the boiler. You can probably find it online but watch out for scam sites serving malware with the manuals.

2. pressure gauges on my combi boilers have had a green or black line marking the range it should be pressurised to.

3. if it loses pressure again, find the leak before repressurising.

4. flame whoever took it off and didn't put it back right.

 

[Slick]

[QUOTE 5232729, member: 45"]The manual doesn't tell you how to fill it. It just says follow a fitters instructions. I was reading it at 645 this morning.[/QUOTE]
They are all slightly different set ups depending on where they are being sited and available space. I'm in a new build and couldn't find mine and eventually called the builder more than a bit embarrassed but it turned out the builder forgot to install an inspection door to allow access to the valves. Put your system into YouTube and you will see exactly how to do it.

 

[mjr]

[QUOTE 5232729, member: 45"]The manual doesn't tell you how to fill it. It just says follow a fitters instructions. I was reading it at 645 this morning.[/QUOTE]
5. flame the boiler manufacturer for the crap manual and the fitter for not leaving instructions. Bonus points for calling the fitter's mobile at 645.

 

[User6179]

[QUOTE 5232756, member: 45"]Just checked youtube. There's a filler screw in the bottom of the boiler that needs a screwdriver to open it. Dunno why that's not in the manual.[/QUOTE]

Yes but don't you need to put a hose between pipe 1 (heating flow) and pipe 5 (cold water) before turning the screw?

 

[ColinJ]

[QUOTE 5232764, member: 45"]Not according to YouTube.[/QUOTE]
Have a mop handy just in case!

 

[raleighnut]

[QUOTE 5232756, member: 45"]Just checked youtube. There's a filler screw in the bottom of the boiler that needs a screwdriver to open it. Dunno why that's not in the manual.[/QUOTE]
I wondered if it was internal.

 

[Slick]

Nice.