Venting a Grundfos

[Buzzbob]

My Potterton Flamingo 40 boiler started kettling in the last week and (i think) i've traced the problem to a faulty Grundfos pump (15/50*18). Have swapped it over for a new 15/50 this morning. I've followed the instructions for bringing it online but all i got was a slight puff (!!!) from the vent screw. I was expecting a good gush of water.

Both HW and CH are working fine.

I'm concerned that i may damage it because its got an airblock in the head.

Should i be happy with a slight puff?

Cheers guys,

Buzzbob

 

[Buzzbob]

I've no idea where that smilie came from. It was a 15 slash 50 by 18.

 

[Buzzbob]

No takers out there?

I've just tried again and the water does dribble out.

Should it do any more than this?

Buzzbob

 

[Rob]

If its running quietly and you've had water out the front then its fine.

 

[Buzzbob]

Cheers Rob.