COLD RADIATORS PUMP WORKING

[onelivebadger]

Hi I have just fitted a new TRV, having first drained the water. I have filled the system back up, turned on the CH on and the radiators are all cold. It is an old gravity feed system, i have bleed the radiators, and the bleed valve after the pump. The pump is turning but you cannot hear any water running through the system. Please help.

 

[cross thread]

bleed valve on the pump?

 

[onelivebadger]

Hi There does not appear to be a bleed valve on the pump, although it is a Danfos Pump

 

[kevplumb]

err danfoss pump ??

or do you mean grundfoss ??

if so undo the large silver screw in the centre (little water )

 

[onelivebadger]

Sorry Kev got me fosses mixed up. It is a Grundfos UPS 15-50 CLASS F, U949. I don,t no if this will help. I have just taken a picture of it, is it the Posidriv screw which looks like it is holding the cover on.

 

[kevplumb]

big silver screw in the middle of the head undo it
you will get some water out eventually so have a cloth handy

 

[onelivebadger]

Thanks Kevin, All radiators are getting hot, is there anything else i need to do, or keep an eye on.

Kind Regards jockwok