New Riello rdb oil pump not working.

[CJAY40]

Hi all, all new to this breakdown life, currently waiting on getting on a training course, so just been relying on technical and instructions since I passed my oftec.

The current boiler is a two pipe line off a tiger loop.

I went to a Grant vortex boiler last week where the boiler went into lockout after its purge, the pump was only showing 2bar on the gauge, the solenoid was showing in between the allowances. The photocell was fine, it’s recently had a new nozzle which looked clean. So I opted in for a new pump and rang grant technical and Riello technical to confirm. Which they did.

A couple days later , return to fit the new pump, the pump fired up the boiler for around 10 minutes , after 10 minutes of walking round the house making sure everything’s warm and returning to the boiler, the boiler eventually went back into lockout and won’t fire up again, lockout every time after it’s purge.
Put my gauge on the pump and the pump wasn’t reading anything on the gauge.

Spoke to technical and they said it must be a faulty pump, which is fair enough but I want to know if there is anything else I can check so I can eliminate other components so I don’t fit a new pump and have the same outcome.

Any help would be appreciated! Thankyou

 

[Inverness]

Try a new Capacitor??

 

[Best]

For starters, - did you try to adjust the pressure on the original oil pump? Often people mess with them and turn the pressure adjusting screw, typically when wrongly thinking they can bleed the oil line there.
Also did you check oil flow okay - oil filters clean at tank or wherever?
Did you fit bypass screw in pump for 2 pipe system?
If burner motor is turning ok then you should be getting oil pressure at pump.
Oil hoses and connections make sure all sound or Tigerloop will not work

 

[MikeJhn]

Plus one on the bypass screw, but I can't think that Riello would not have mentioned to check that?