switch heating on - nothing. Hw on ok, HW + Heat ok...

[zippy7272]

Condensing conventional boiler (not a combi) baxi barcelona

From the programmer:

If I switch the heating on, the light on the controller comes on, but no power goes to the boiler.

If I switch the hot water & heating on through the controller both lights come on and the boiler lights up and fires. I then get hot water and heating (although not as hot).

This is a fault, rather than normal.

What's wrong, and what if anything could I do to give me more heating - I don't want hot water at all?

Any ideas

 

[hi-spec plumbing heating]

either a faulty room stat or motorised valve

 

[zippy7272]

cheers - we dont have a room stat - so it must be...

 

[hi-spec plumbing heating]

what make is the valve.

 

[zippy7272]

Sorry, no idea. I'll take a look tomorrow.

Thanks for the help.

 

[Rob]

Motor valve might not be wired correctly...

Some older programmers dont have CH only function for some reason.

 

[zippy7272]

This is a fault, rather than normal.

This was a statement rather than a question. What I was trying to sum up was that it only went wrong a couple of days ago.

As it goes it happened, on a day when a 'fuse' was tripped on the main fuse box.

Is there likely to be a fuse local to the motorised valve?

 

[bengasman]

More likely that fault in heating system caused the breaker to trip. Installing boiler without a roomstat is cutting corners, could well be that other parts of the installation are not as good as they could be.

 

[zippy7272]

When we had the system overhauled and a new boiler put in 8 years or so ago. We specifically asked not to have a room thermostat, as we wanted individual control in each room via the trv's.

 

[zippy7272]

what make is the valve.

There are 2 x 2port valves

both are drayton acl lifestyle p/n 679 h308-30L1

I guess in the meantime I could swap them over. (I don't want hw just ch for now) I've read there a button to press to release the valve.

Is it the button at the top end, ie above the text. Do I just push this and lift it off?[/img]

 

[namsag]

Button is in middle on the side of valve

 

[Agile]

When we had the system overhauled and a new boiler put in 8 years or so ago. We specifically asked not to have a room thermostat, as we wanted individual control in each room via the trv's.

That was wrong and your installer should have told you!

You still need a room stat even when you have TRVs ( which you must have now anyway! ). Thats unless you have one of the few boilers which have a flow detection device to identify when all the TRVs are closed.

Tony

 

[zippy7272]

Not sure what was "wrong"?

The boiler needs a small change to the wiring connections if all the rads have trv's. However we deliberatly left a couple without trv's.

It seems to work fine for us.