In an earlier contribution to this discussion,
Dean Cox   wrote:


> Just ran the pump on it's own no problems no tripping. I then ran the
> boiler with the pump running independantly (i.e. the wire from the
> boiler disconnected) and it didn't trip, however the boiler did shut
> down and restart a few times in the ten minutes it ran, which was
> what it was doing before it failed to supply the pump with power. The
> room stat was turned right up to.??
>
> Dean


[Apologies for starting a new thread - OE is playing silly B'e with the old
one!]

Slightly inconclusive then! Whatever was tripping the RCD before now isn't
for some reason - but you don't really know whether it was the boiler ot the
pump.

The boiler is cycling because it is producing heat faster than it is being
taken away. Remind me where all this started - did you have lack of
circulation due to a supposed air-lock?

During the 10 minutes when the boiler was on, did the radiators get hot?
Have any/all of them got TRVs on and, if so, are they fully open?

If there are no TRVs and no airlocks, and all the radiators are turned on,
the room stat is fully up, and the pump is working properly (a lot of
'ifs'!) I would expect the boiler to fire continuously until everything is
hot.
-- 
Cheers,
Set Square
______
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"Set Square"  wrote in message 
news:3njo7tF1sjp1U1@individual.net...

> In an earlier contribution to this discussion,
> Dean Cox   wrote:
>
>> Just ran the pump on it's own no problems no tripping. I then ran the
>> boiler with the pump running independantly (i.e. the wire from the
>> boiler disconnected) and it didn't trip, however the boiler did shut
>> down and restart a few times in the ten minutes it ran, which was
>> what it was doing before it failed to supply the pump with power. The
>> room stat was turned right up to.??
>>
>> Dean
>
> [Apologies for starting a new thread - OE is playing silly B'e with the 
> old
> one!]
>
> Slightly inconclusive then! Whatever was tripping the RCD before now isn't
> for some reason - but you don't really know whether it was the boiler ot 
> the
> pump.
>
> The boiler is cycling because it is producing heat faster than it is being
> taken away. Remind me where all this started - did you have lack of
> circulation due to a supposed air-lock?
>
> During the 10 minutes when the boiler was on, did the radiators get hot?
> Have any/all of them got TRVs on and, if so, are they fully open?
>
> If there are no TRVs and no airlocks, and all the radiators are turned on,
> the room stat is fully up, and the pump is working properly (a lot of
> 'ifs'!) I would expect the boiler to fire continuously until everything is
> hot.
> -- 
> Cheers,
> Set Square
> ______
> Please reply to newsgroup. Reply address is invalid.
>


All TRV's have been taken off, All radiators are full. Room stat up, pump 
running. When I ran it for 10 minutes some of the the radiatiors were 
getting hot. Can a pump run slow? It is on its maximum speed at the moment, 
but i have no idea how efficient it is, plus this doesn't solve the fact 
that no power is coming from the boiler to power the pump. So i fugure 
either the pump was not efficient enough and something went in the boiler to 
stop it supplying power to the pump or something is amiss in the boiler. 
There is the question of an led on when the boiler shuts down. I will try 
Glowworm Technical this morning to see if they can shed any light.

Dean

In an earlier contribution to this discussion,
Dean Cox   wrote:


>>
>
> All TRV's have been taken off, All radiators are full. Room stat up,
> pump running. When I ran it for 10 minutes some of the the radiatiors
> were getting hot. Can a pump run slow? It is on its maximum speed at
> the moment, but i have no idea how efficient it is, plus this doesn't
> solve the fact that no power is coming from the boiler to power the
> pump. So i fugure either the pump was not efficient enough and
> something went in the boiler to stop it supplying power to the pump
> or something is amiss in the boiler. There is the question of an led
> on when the boiler shuts down. I will try Glowworm Technical this
> morning to see if they can shed any light.
>
> Dean


Pumps can sometimes lose part (or all!) of their impellor - which makes them
rather less efficient!

You could still have an air lock in some of the radiator supply pipes, even
though the rads have water in them. You could try closing the valves on
those which *do* get hot in order to try to force some water round the
others. This may clear any air at the same time. The other thing you can do
is to bleed a *lot* (several pints) of water out of each rad - first with
one valve open and then with the other - but not both at the same time. This
will ensure that *both* flow and return pipes are clear of air.

There may well be a fault in the boiler - unless there is an RCD trip for
it's pump supply, which could have tripped? You could ask GW Tech about
that, perhaps.
-- 
Cheers,
Set Square
______
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"Set Square"  wrote in message 
news:3nla73F23ucvU1@individual.net...

> In an earlier contribution to this discussion,
> Dean Cox   wrote:
>
>>>
>>
>> All TRV's have been taken off, All radiators are full. Room stat up,
>> pump running. When I ran it for 10 minutes some of the the radiatiors
>> were getting hot. Can a pump run slow? It is on its maximum speed at
>> the moment, but i have no idea how efficient it is, plus this doesn't
>> solve the fact that no power is coming from the boiler to power the
>> pump. So i fugure either the pump was not efficient enough and
>> something went in the boiler to stop it supplying power to the pump
>> or something is amiss in the boiler. There is the question of an led
>> on when the boiler shuts down. I will try Glowworm Technical this
>> morning to see if they can shed any light.
>>
>> Dean
>
> Pumps can sometimes lose part (or all!) of their impellor - which makes 
> them
> rather less efficient!
>
> You could still have an air lock in some of the radiator supply pipes, 
> even
> though the rads have water in them. You could try closing the valves on
> those which *do* get hot in order to try to force some water round the
> others. This may clear any air at the same time. The other thing you can 
> do
> is to bleed a *lot* (several pints) of water out of each rad - first with
> one valve open and then with the other - but not both at the same time. 
> This
> will ensure that *both* flow and return pipes are clear of air.
>
> There may well be a fault in the boiler - unless there is an RCD trip for
> it's pump supply, which could have tripped? You could ask GW Tech about
> that, perhaps.
> -- 
> Cheers,
> Set Square
> ______


Spoke to Glowworm technical who advised it is the PCB. Ran the pump on its 
own all day and the boiler was coming on and off, but got heat to all the 
rads. I'll try and get it refurbed and let everyone know! Although I am 
still concerned that something may have brought on the fault e.g. 
inefficient pump?

Dean