novice about to fit GRUNDFOS SELECTRIC pump HELP !!

[twedspeed]

Hi , my central heating is making noises . And coz of the credit crunch and the fact that PLUMBWORLD sell new GRUNDFOS SELECTRIC UPS 15/50 for 65 Quid I,m thinking of doing it myself what I need to know is any thing I have nt thought of to look out for ..........
I thought
1/ isolate main electric at the box under the stairs .
2 / isolate the pump with the two screwdriver isolations on the couplings top and bottom
3 / get a BIG spanner and undoo the pump
4/ make a good note of where electric wires go in terminal box and make sure new pump is wired identicallly .
5/ Fit new pump in place with massive spanners and a bit of thread tape
6 / open isolations and turn system on and stand well back.
bish bosh £65 quid and I,m golden .........
So will it need bleeding ?
wots the big silver screw thing on the front for
Am I allowed to do this by law
WOTS THE THREE diferent SETTINGS ON THE TERMINAL BOX FOR ?
is it actually knackered in the first place - I.E. could I just fiddle with the setting switch on the terminal box and would that make the horrid noise go away and forget all the other stuff I mentioned .
Are those two screw slots on the upper and lower couplings isolations or not ? and if not will I have to bleed the ntire system down ? OR SHOULD I JUST CALL A PLUMBER AND PAY THE £200 QUID LIKE A GOOD BOY
or is there anything Ive missed

 

[kevplumb]

1/ isolate main electric at the box under the stairs .
2 / isolate the pump with the two screwdriver isolations on the couplings top and bottom
3 / get a BIG spanner and undoo the pump
4/ make a good note of where electric wires go in terminal box and make sure new pump is wired identicallly .
5/ Fit new pump in place with massive spanners and a bit of thread tape
6 / open isolations and turn system on

1 no need just isolate the power at the boiler

2 you could try they are prob seized and will prob leak

3 yes

4 yes and make sure its fitted the right way round (arrow on body)

5 yes and use new gaskets no need for thread tape

6 yup


big silver screw is to bleed the pump or spin the shaft

numbers are speed settings

good luck

 

[petit_pablo]

2 / isolate the pump with the two screwdriver isolations on the couplings top and bottom

These will most probably leak, not shut off properly or both.

3 / get a BIG spanner and undoo the pump

Water pump pliers would be better

4/ make a good note of where electric wires go in terminal box and make sure new pump is wired identicallly .

No need, remove wires from pump instead.

5/ Fit new pump in place with massive spanners and a bit of thread tape

No need for ptfe, pump will come with 2 x washers. Just nip up the unions a touch past hand tight.

So will it need bleeding ?

Probably! Use silver screw to bleed

Am I allowed to do this by law

Yes

WOTS THE THREE diferent SETTINGS ON THE TERMINAL BOX FOR ?

Pump speed 1 slowest- 3 fastest

is it actually knackered in the first place - I.E. could I just fiddle with the setting switch on the terminal box and would that make the horrid noise go away and forget all the other stuff I mentioned .

Can you elaborate on the fault a bit please

OR SHOULD I JUST CALL A PLUMBER AND PAY THE £200 QUID LIKE A GOOD BOY

I would

 

[KevC1]

It's unfortunate the pump valves are the globe type. These type ALWAYS leak from the gland, and once turned will leak when open or closed.

It's would be better to drain the heating and replace these pump valves while you're doing it.

Get a DAB pump, they're £35.

Don't take the wiring out of the wiring centre, wire it in at the pump end, most of them are like a grip type wiring, just like speakers.

 

[kirkgas]

1/ isolate main electric at the box under the stairs .
2 / isolate the pump with the two screwdriver isolations on the couplings top and bottom
3 / get a BIG spanner and undoo the pump
4/ make a good note of where electric wires go in terminal box and make sure new pump is wired identicallly .
5/ Fit new pump in place with massive spanners and a bit of thread tape
6 / open isolations and turn system on

1 no need just isolate the power at the boiler

Kev this advice could be dodgy, the boiler could have its own isolator which might not isolate the pump, OP seems inexperienced as he/she didnt mention checking for safe isolation(neither did anyone else ) and wanted to turn off at the main, if not testing for safe isolation turning off at the main is the best bet, (although testing for safe isolation MUST be encouraged, via the heating spur, as you suggested, would be the way we would do it)

PS note to BAS, look at the time, i couldnt be arsed sorting out a better formatted post so i put my comments in bold so people could easily distinguish my comment from the OP's, hope my advice although poorly written meets with your approval


2 you could try they are prob seized and will prob leak

3 yes

4 yes and make sure its fitted the right way round (arrow on body)

5 yes and use new gaskets no need for thread tape

6 yup


big silver screw is to bleed the pump or spin the shaft

numbers are speed settings

good luck

 

[twedspeed]

Hi , thanx for feed back - was all set and confident to do it - BUT FOR THOSE LEAKY ISOLATIONS - I just had a look and theyve got signs of previous leaks already ! ( although dry and crusted , NOT actually wet ) Such a pity ,
On the plus side E-Bay is full of grundfos pumps all about £30 - £40 - suprisingly all brand new in box and perfect working order yeah I bet !!!
CHEEERS LADS THANX AGAIN .

 

[doitall]

That is about what I would expect to pay, I'm sure they are quite legit, and you would be covered by eBay anyway.

I would have no problem buying one from eBay, although I can get them at that price in PTS.

 

[kevplumb]

get yourself up to sedgefield racecourse sunday morning pick one up for pennies (well £20) and they do work

i had a few off the lad a couple of years back

 

[doitall]

Cost him £350.00 in air fares mind.

 

[kevplumb]

Cost him £350.00 in air fares mind.

why its where blair hails from

good reason not to go i suppose

350 is one way fella

 

[doitall]

You don't travel Baggage class then

Last time I was in Florida they were flogging tickets for £89 quid return.