Worcester 240 Combi Problems

[simonpdl]

Am having quite common problems with the Worcester 240 - CH is fine but there is no hot water unless the CH is also switched on and then it's tepid.
From what i can gather there is a good chance it's the diverter valve/diaphragm.
How easy are these to fit yourself (i don't wish to blow the house up) and does anyone know where I could download a 240 manual. Can't find them anywhere.
Many thanks.

simon

 

[petit_pablo]

Nice and easy to cure. The diaphragm is located within the round brass section at the front. Turn off cold main, open hot tap, undo 6/8 screws and 1 nut to remove.

Diaphragm will cost a few pounds from parts centre

 

[simonpdl]

Many thanks. Will try that today!

 

[simonpdl]

Actually I've read someone that I will have to drain the whole system to do this. Is this true? Your method sounds a whole lot easier!

 

[petit_pablo]

Not if your doing the hot water diaphragm. The diverter valve would require full draining.

 

[simonpdl]

Nice and easy to cure. The diaphragm is located within the round brass section at the front. Turn off cold main, open hot tap, undo 6/8 screws and 1 nut to remove.


sorry to sound dense but do you mean switch on the hot taps around the house or on the boiler? I can't find the hot tap on the boiler. There is a tap to increase pressure but that's about it.
Also would i have to switch off the gas supply and isolate the electric?
Thanks for your help.

 

[COD4]

Open hot tap at sink, turn off mains supply to boiler & turn fuse spur supplying boiler off, just incase any little drips on electrics.

 

[simonpdl]

replaced the diaphragm (it was distressed and contained a couple of holes) and now I'm getting hot water! Thanks for all the help
However a couple of small things. One of the pipes leading into the diverter valve is leaking. Very very slowly. About one drip every ten mins. I did replace the washers but any other hints on how to stop the drip.
And since changing the diaphragm the bar pressure goes up to about 2 when the heating is on. Previously it didn't go about 1 1/2. should i be worried?

 

[pappyon]

quote:
And since changing the diaphragm the bar pressure goes up to about 2 when the heating is on. Previously it didn't go about 1 1/2. should i be worried?

Don't know if it's like yours, but I have the 24CD1 system and I keep the pressure at 2 bar. The instruction manual says not to run it above 2.5 bar max

Sorry I can't help with your other question. I get my system maintained by Scottish Gas