Sterling 40 coil voltage

[bennythedip]

Hi all,
Had a quick look at a sterling 40 this evening. There was no oil going to nozzle but definitely oil in the pump. I checked the voltage going to the coil and its 80volts. Is that enough to open the valve? Didn't have magnet to stick on it to see if it would run. All your input appreciated.

 

[lame plumber]

duff solenoid, jammed valve hard to say as I just stick a solenoid tester over the top to see if it lights up or not more important is whether or not you are getting the correct pressure off the pump to push the nozzle spring open, which negates the need for voltage test really.

 

[bennythedip]

Was only a quick stop on way home, thought it might be a 5min job. Not much fun when it's pitch black with hail stones battering off ya so I just left it!

 

[lame plumber]

silly boy, only work on external boilers when the sun is shining

 

[bennythedip]

Doubt I'll be waiting to cram them all into that one week in June then!!

 

[lame plumber]

can't work on them in the wet, my risk assessor says I might get electrocuted

 

[bennythedip]

Just for anyone that's interested, the photocell was faulty. I rembered I came across this a few years ago as I wouldn't work on a sterling burner too often. I'm still not sure if it means that the correct voltage is not sent out when it checks resistance of photocell or not. I forgot to check what's the voltage sent out to coil when it's running correctly. It's a sneaky one!!

 

[Pitchfork]

There is normally 50-80v to coil when boiler in purge mode, this is then upped to 230-240 when coil needs to be energised.