Heatslave 20/25

[Tickle32]

Hi,

I had a new water pump fitted on my heatslave 20/25 boiler and from what I can tell all is working fine. System has been bled.

The boiler runs and works. Only it won’t fire,
It worked fine before the pump went.
It’s been running now for about 1 hour and it’s still the same.

I’m lost as only the water was drained out the system to replace the pump.

Any help would be great. Thanks

 

[cross thread]

Has it a over heat reset that has operated

 

[Tickle32]

i found one switch that is under the control box a red button but that was ok.
Is there another?

It runs but just won’t fire and heat the water up.

 

[muggles]

Think there are two overheats on these

 

[Tickle32]

Ahh i thought there was only the one under the control panel and the burner.

I’ll have another look and see if I can find anything. It’s strange as it’s worked before the pump went wrong.

Thanks for the advice I’ll see what I can find

 

[Johntheo5]

If the overheat(s) have operated and are not reset then the fan motor will not run, if its just running and running then one reason for this is that the photoelectric cell is seeing a (generally, false) flame during the purge period so just keeps running without lockout, you could try cleaning the cell but it may require a new one, if, in fact, that is the problem. Also, just try switching off the power off and on to the boiler.

What circ pump and setting is it on?.

 

[oilhead]

Which burner is it? On any burner, you should be able to disconnect the P/cell. Do that and see if the burner lights, then locks out. If so, then you have your solution

 

[ericmark]

It seems more than one version of heatslave 20/25 mine works fine without the pump running, only for DHW the central heating does not work, but it does not need a pump to fire up and run, so either a different model to yours, or faults not related.

 

[roguetrader]

Did it fire initially?
Before we get too technical...
Crack the bleed screw on the pump.

 

[oilhead]

Did it fire initially?
Before we get too technical...
Crack the bleed screw on the pump.

If it was lack of oil, then the burner would go to lockout. If the burner motor is runnimg continuously, then it is either a faulty photocell or a control box fault. Testing for a faulty photocell is hardly technical.

 

[roguetrader]

If it was lack of oil, then the burner would go to lockout. If the burner motor is runnimg continuously, then it is either a faulty photocell or a control box fault. Testing for a faulty photocell is hardly technical.

On the circulating pump.
Wasn't looking for an argument, just for the person to bleed the 'water pump' that's just been fitted.

 

[roguetrader]

I was in front of one of these Friday morning.
Pipe to pump (circulator) red hot, pump (circulator) running but full of air.