Wiring a hot water pump

rubberduck · 27 Jan 2020 at 09:48

Hi

Can I wire a hot water pump such as a Grundfos 15/50 direct from a mains socket plug by simply connecting up the live neutral and earth wires to the corresponding terminals? I understand I will require a 3A fuse and need to follow the manual in relation to using 1 mm2 cores. Will this work?

Thanks

Burned_Alive · 27 Jan 2020 at 10:39

Our original salamander system pump came with a plug wired onto it and so did the Stuart Turner pump that replaced it, so I would imagine it's fine.

FlyingFish · 28 Jan 2020 at 22:47

Yes you can wire a 15/50 with 3 core heatproof flex to a 3 pin 3A fused plug. My question is why would you want to? And are you aware its a heating circulator?

Mick

rubberduck · 29 Jan 2020 at 19:44

FlyingFish said:
Yes you can wire a 15/50 with 3 core heatproof flex to a 3 pin 3A fused plug. My question is why would you want to? And are you aware its a heating circulator?

Mick

Hi, thanks for the reply. I want to have the water circulating through my heating pipework periodically while I attempt to clean out my boilermate thermal store with a few fill/drain cycles.

FlyingFish · 29 Jan 2020 at 21:20

Gledhill Boilermates have 3 pumps (the ones I've seen) what are you trying to do and how? If you dont mind me asking

The_One · 29 Jan 2020 at 21:36

good luck cleaning the thermal store out!! better off binning the piece of junk

FlyingFish · 29 Jan 2020 at 21:38

Bit harsh, at least let him try before finding that out

rubberduck · 30 Jan 2020 at 17:18

FlyingFish said:
Gledhill Boilermates have 3 pumps (the ones I've seen) what are you trying to do and how? If you dont mind me asking

My idea is to top feed and drain the system at the same time until the water from the drain runs clear.
I will have the heating circulation pump running at the same time to get fresh water in to the heating loop and provide some agitation and mixing of old and new water.

The_One · 31 Jan 2020 at 22:09

rubberduck said:
My idea is to top feed and drain the system at the same time until the water from the drain runs clear.
I will have the heating circulation pump running at the same time to get fresh water in to the heating loop and provide some agitation and mixing of old and new water.

draining thermal store whilst running heating pump and draining via a drain off is a very bad idea, you are going to drag so much **** through your pipework its going to settle in places you don't want it afterwards

rubberduck · 2 Feb 2020 at 22:51

The_One said:
draining thermal store whilst running heating pump and draining via a drain off is a very bad idea, you are going to drag so much **** through your pipework its going to settle in places you don't want it afterwards

But the water in the thermal store circulates through the heating pipework and radiators during normal operation. I don't see the difference.

ANDARIAL · 3 Feb 2020 at 08:53

Hose pipe from mains to 1 drainoff `male chicken`
hose to lowest other drainoff `male chicken` to outside drain
Turn off all rads bar one,last in line /top of house
Turn on water ,watch output till it runs clear
Turn on next rad in line,then turn off previous rad.Rinse and repeat till all done

This is what i have seen plumbers do on many occasions

FlyingFish · 3 Feb 2020 at 12:23

Yeehar proper cowboy high risk method, that only flushes legs of pipework. You need to find better plumbers.

ANDARIAL · 3 Feb 2020 at 13:08

FlyingFish said:
Yeehar proper cowboy high risk method, that only flushes legs of pipework. You need to find better plumbers.

Really?
I would have thought that that method would clear ALL pipework?
Is it not like using a `PowerFlush`?

darael · 3 Feb 2020 at 13:57

ANDARIAL said:
Really?
I would have thought that that method would clear ALL pipework?
Is it not like using a `PowerFlush`?

I'd imagine you need to take each radiator off the wall and clean them out with a hose - for example, turn each radiator upside down, fill, agitate, empty and repeat until water runs clear. Then clean the pipes with a proper power flush with magnetic filter before reattaching the radiators. Finally add inhibitor. I think it's best to add system cleaner into a running system for a week to get the best results.

FlyingFish · 3 Feb 2020 at 14:00

ANDARIAL said:
Really?
I would have thought that that method would clear ALL pipework?
Is it not like using a `PowerFlush`?

No, nothing like, and your applying mains pressure to a heating circuit. Those components are not rated for mains pressure. If you fill at one point and empty at another your only flushing whatever leg of pipe is in between. A power flush machine washes an individual circuit including radiators, using chemicals and agitation. This is done through every radiator circuit until all clean.