DHW Valve alpha CB24 help

[mickboy]

Can any one out there please tell me if there is an exloded diagram available for the Dhw diverter valve on an Alpha CB24.
I took it to bits to clean it on the advice of my mate {Who is qualified and fitted the boiler] He is on holiday now anyway]
I laid the parts out in the order they came out , and idiot offspring decided to make a cup of tea and disturbed them.
Ive a good idea as i'd alreadty reassembled the diapragm section. Its the order of parts on the chrome shaft Ii'm not sure of

 

[Boilerman2]

Try www.partsareana.co.uk

You may be able to find what you are lookibg for there

 

[Agile]

Commercially on that model I would normally expect to replace the whole valve as they can fail on other parts than the diaphragm.

Commercially there is little point in charging an hour's labour when that cost can be used instead to buy a new valve.

Tony

 

[Paul Barker]

i don't have one in front of me or a diagram Chris usually comes up with those.

but I can tell you how it works so that you can assemble it intelligently.

i believe you are talking about the primary section on your left when installed, looking at boiler.

The large connector on the left (facing left) is the flow pipe to your radiators. moving along to the right the next pipe (which comes out at the front facing you) is the flow pipe from the main heat exchanger. To the right of that is the flow pipe to the plate heat exchanger (pointing up).

At rest with no hot water demand the push rod sits such that the route is open from the middle pipe to the left hand pipe. this is achieved by a large spring in the diaphragm assembly which through the dhw push rod (right hand) pushes the primary (left hand) pushrod leftwards, even a gainst a weaker primary spring on the left hand end of the pushrod whose job is to make the left hand push rod follow the right hand one to the right when hot water demand forces through the diapragm a greater strength than the large diaphragm spring. A cone shaped part is held away leftwards from it's seat. At the same time another cone shaped part orientated opposite to it on the right hand side is held against it's seat.

When dhw is drawn the power of the diaphragm pushes the right hand push rod to the right. the large spring in the dhw side is overcome and now the weaker left hand spring pushes the left hand pushrod rightwards to follow it, the notch between the two pushrods lines up with the protrusion in the flow switch allwing it to drop and create a demand for the burner to light in hot water mode. the right hand cone part is undseated allowing the hydraulic changes to take place and the left one seats preventing leaching to the central heating system.

with that knowledge you should be able to assemble it correctly. For one of these to leach or be overcome by sludge is very rare, but not unheard of. The diaphragm and microswitch are the normal failures. On reassembly of a diaphragm incorrect centering creates a frustrating leak for novices. The grub screw holding the dhw side down into the brass manifold against the full force of your water main is another trap awaiting you. If not fitted properly you have full force water pressure to deal with.

 

[Boilerman2]

Just order a complete Diverter valve, as previous advice is right, they ain't worth fiddling about with

 

[Paul Barker]

send it to me I'll put it together.

 

[Boilerman2]

Valve out in Half Hour, 2 days in the post, another day being put back together, 2 Days being posted back again another hour to reinstall & test,

Thats a WEEK with no heat or Hotwater. at say £30 to cover postage two ways and valve repair.

Option B. Order new Diverter approx £85, Boiler fixed within 3Hrs

Say No More

 

[Paul Barker]

People are too soft these days. What's the problem with no heating and hot water for a week?

i just got back from Beamish. I'd love to send you lot back to 1916 to the coal face, then you'd apreciate what luxury you live in today.

Even in my childhood (we lived a few miles from Beamish at Pelton Lane Ends) we had a netty in the back yard and a tin bath in front of the coal fire and pans on the coal gas cooker warming up for our baths. In one short lifetime things have gone stupid. I'm sick of all this intollerance. Central heating and instant hot water is a luxury not a life threatening necessity. not to mention it is wummer and the heating doesn't go on until September in sensible households.

 

[glasgowgas]

People are too soft these days. What's the problem with no heating and hot water for a week?

i just got back from Beamish. I'd love to send you lot back to 1916 to the coal face, then you'd apreciate what luxury you live in today.

Even in my childhood (we lived a few miles from Beamish at Pelton Lane Ends) we had a netty in the back yard and a tin bath in front of the coal fire and pans on the coal gas cooker warming up for our baths. In one short lifetime things have gone stupid. I'm sick of all this intollerance. Central heating and instant hot water is a luxury not a life threatening necessity. not to mention it is wummer and the heating doesn't go on until September in sensible households.

stayed down that neck of the woods a few years (South Causey near Consett)..........................

feckin third world mate.