I've got an old Chaffoteaux et Maury boiler that has stoped working (
Challenger 50 ff).

When the boiler fires up the circuit in the boiler is supposed to send
240v to the pump but it doesn't.
Done some checks on the pcb and the circuit that controls the pump is
not working.


Can I diconnect the pump from the boiler and run it from the 3 port
diverter valve and central heating progammer instead or will this
damage the boiler in any way.

Is it the orange wire I connect to the pump?

Thanks

Martin

In an earlier contribution to this discussion,
Martin.Coram@Manchester.ac.uk   wrote:


> I've got an old Chaffoteaux et Maury boiler that has stoped working (
> Challenger 50 ff).
>
> When the boiler fires up the circuit in the boiler is supposed to send
> 240v to the pump but it doesn't.
> Done some checks on the pcb and the circuit that controls the pump is
> not working.
>
>
> Can I diconnect the pump from the boiler and run it from the 3 port
> diverter valve and central heating progammer instead or will this
> damage the boiler in any way.
>
> Is it the orange wire I connect to the pump?
>
> Thanks
>
> Martin


You could connect it to the boiler's switched live feed rather than to the
boiler's pump terminal. Only problem is that pump over-run won't then work.
So if the boiler needs the pump to keep running a bit after the room stat
has turned the burner off, it won't - and the boiler may overheat, and trip.
-- 
Cheers,
Set Square
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In article ,
    wrote:

> I've got an old Chaffoteaux et Maury boiler that has stoped working (
> Challenger 50 ff).

> When the boiler fires up the circuit in the boiler is supposed to send
> 240v to the pump but it doesn't.
> Done some checks on the pcb and the circuit that controls the pump is
> not working.


I'd suspect a faulty relay on a device this old.

-- 
*If at first you don't succeed, try management *

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

In message , Set Square  
writes

>In an earlier contribution to this discussion,
>Martin.Coram@Manchester.ac.uk   wrote:
>
>> I've got an old Chaffoteaux et Maury boiler that has stoped working (
>> Challenger 50 ff).
>>
>> When the boiler fires up the circuit in the boiler is supposed to send
>> 240v to the pump but it doesn't.
>> Done some checks on the pcb and the circuit that controls the pump is
>> not working.
>>
>>
>> Can I diconnect the pump from the boiler and run it from the 3 port
>> diverter valve and central heating progammer instead or will this
>> damage the boiler in any way.
>>
>> Is it the orange wire I connect to the pump?
>>
>> Thanks
>>
>> Martin
>
>You could connect it to the boiler's switched live feed rather than to the
>boiler's pump terminal. Only problem is that pump over-run won't then work.
>So if the boiler needs the pump to keep running a bit after the room stat
>has turned the burner off, it won't - and the boiler may overheat, and trip.


I'm not 100% sure off the top of my head, but I don't think that the 
challenger has a pump overrun on it


-- 
geoff

In message , "Dave Plowman (News)" 
 writes

>In article ,
>    wrote:
>> I've got an old Chaffoteaux et Maury boiler that has stoped working (
>> Challenger 50 ff).
>
>> When the boiler fires up the circuit in the boiler is supposed to send
>> 240v to the pump but it doesn't.
>> Done some checks on the pcb and the circuit that controls the pump is
>> not working.
>
>I'd suspect a faulty relay on a device this old.
>

Nope, it's run by a triac

-- 
geoff

In article ,
   raden  wrote:

> >> When the boiler fires up the circuit in the boiler is supposed to
> >> send 240v to the pump but it doesn't. Done some checks on the pcb and
> >> the circuit that controls the pump is not working.
> >
> >I'd suspect a faulty relay on a device this old.
> >
> Nope, it's run by a triac


Then I'd suspect the triac. ;-)

-- 
*If at first you don't succeed, avoid skydiving.*

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

In message , "Dave Plowman (News)" 
 writes

>In article ,
>   raden  wrote:
>> >> When the boiler fires up the circuit in the boiler is supposed to
>> >> send 240v to the pump but it doesn't. Done some checks on the pcb and
>> >> the circuit that controls the pump is not working.
>> >
>> >I'd suspect a faulty relay on a device this old.
>> >
>> Nope, it's run by a triac
>
>Then I'd suspect the triac. ;-)
>

As they say ...

No shit Sherlock

but there are usually a couple of caps which go too

(just for a change)

-- 
geoff

Nope it's not the triac, I've had it out and tested it and then put it
back on the pcb and re-tested it by connecting to the gate resistor.
I guess it's the gate drive chip/circuit but done a google on the IC
number but get nothing.
Will check the caps and anything else that looks like it might be
involved.
The pump has a 15 second overrun.

Martin