The pressure on my SIME Super Combination Boiler is on 3.5 currently,
it should be 1.5. How I can get it down?

I also have another problem in that one of the radiators is not
emitting any heat. I have bled it but it didn't make any difference.
Suggestions welcome and appreciated.

Many thanks

Gill

"Gill F" wrote in message
om...
The pressure on my SIME Super Combination Boiler is on 3.5 currently,
it should be 1.5. How I can get it down?

I also have another problem in that one of the radiators is not
emitting any heat. I have bled it but it didn't make any difference.
Suggestions welcome and appreciated.

Many thanks

Gill


After you bled the radiator, did you refill the system properly? You say
the pressure should be 1.5 Bar, but is that when hot or cold?

The radiator could simply be turned off at one of the valves. Turn the
valves fully open, the same way you turn on a normal sink tap. If you have
a thermostatic valve fitted on one side, then make sure it is at its maximum
heat setting of 5.

On Sun, 19 Dec 2004 08:21:50 -0800, Gill F wrote:

The pressure on my SIME Super Combination Boiler is on 3.5 currently,
it should be 1.5. How I can get it down?

I also have another problem in that one of the radiators is not
emitting any heat. I have bled it but it didn't make any difference.
Suggestions welcome and appreciated.

Many thanks

See FAQ.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html

The pressure on my SIME Super Combination Boiler is on 3.5 currently,
it should be 1.5. How I can get it down?

There may be something wrong with your system. How did the pressure get so
high?

Possible reasons I can think of:

1. You filled it up too high.
2. You left the filling loop connected and the valves are leaking/not closed
3. There is a leak in the heat exchanger that is allowing high pressure
mains water into the central heating loop.
4. You have measured the pressure when the system is hot and the pressure
vessel is shot/uninflated.

Unless you know (1) applies, you may have some fixing to do. To reduce the
pressure, you need to get water out of the system. Find a drain point,
attach a hose and let the water flow.

Also, the pressure relief should usually operate at 3 bar and dump water out
of the tube, but I suppose it could be set at 3.5 bar in this case.

Christian.

You need to drain some water off to get the pressure down and then to fix the rad that isn't working..

as I found out the otherday you probably have an airlock. Turn off all the other radiators except for the one that isn't heating this will force the airlock out. Problem solved