Pump odddness

AndyJobber · 23 Aug 2010

I need someones experience here....

Before kitchen re-fit heating was fine. Flushed system with x800 (ran hot for 1 hour 3x then flushed out several times). Moved pipework to kitchen rad.

Now pump is working but no heat at any downstairs rads. System and pump are old i'm guessing over 20, pump has been running on full speed for years.

I want to be sure a new pump will fix this, and understand how I buggered it up?

What replacement is recommended. I have a Grundfos Selectric (UPS 15-50) with 3 speeds?

assured heating · 23 Aug 2010

Air lock

Nige F · 23 Aug 2010

new pump won`t fix it

kevplumb · 23 Aug 2010

View media item 17592
undo the screw marked bleed

have a cloth handy as you will get some water out

AndyJobber · 24 Aug 2010

I had assume assured heating you weren't refering to air in pump but pipework?

I think there were two air locks in the pipework?

What was confusing was the downstairs rads are on 2 different legs to front and back of house and with many changes over the years never had a single air lock before. So

bottom filled system from mains water which got the rear rads working but not front, so isolated front rads (2 small rads) which pump seemed to clear.

Kevplumb so I know for next time how would air in the pump affect the system?

Cheers all.

Terrywookfit · 24 Aug 2010

It's a water circulator . Not a ferkin air pump!

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Pump odddness

AndyJobber

assured heating

Nige F

kevplumb

AndyJobber

Terrywookfit

DIYnot Local

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