pump change on vaillant - different make

[evgens]

May be my problem is identical to this topic:

//www.diynot.com/forums/plumbing/vaillant-ecotec-630-plus-pump-trouble.307016/

I have Vaillant turboTEC plus VUW 322/3-5 boiler.
The pump works with noise, not so noise but make vibration that transmitted to the boiler case (body and side walls), and next to house wall. As a result I hear in some rooms low frequency hum when boiler pump in on.

Now I bought the replacement pump, reference to boiler model. The new is Grundfos, with black label and white print vaillant...VPAL-7/2A...GRUNDFOS... and counterclockwise arrow.

The old one (WILO, may be?) have white label with black print vaillant...VPAR-7...and clockwise arrow.

My question is the same as in topic above (link on top):
can I change 1) only pump head (this is much more simple, only 4 screws) or 2) I need to change whole pump with all pipe connections.

I think last is true... And this job is more difficult and expensive...

found only one mention in google search (vaillant, pump, vpar, vpal) - at this forum - and came here for your advice or comments

Thank You!

 

[Phill Peck]

No you cannot change the head only

The will pump was not very good so Vaillant replaced with grundfoss they are slightly different and it won't fit properly

 

[Phill Peck]

Also if possible the pipe kits should be replaced at this time

 

[evgens]

Thank You very much.
Pipe kit is included with new pump.

 

[matt1e]

can I change 1) only pump head (this is much more simple, only 4 screws) or 2) I need to change whole pump with all pipe connections.

I think last is true..!

And you have thought correctly!

 

[Agile]

The pump is in the outer combustion chamber and should not be changed by a DIYer in the UK.

 

[muggles]

He's in Russia, if his profile is to be believed

 

[Agile]

Even in Russia, if his profile is to be believed, the pump is still in the outer combustion chamber!

 

[evgens]

Sorry? What it means "the pump is in the outer combustion chamber and should not be changed"? Should not be changed AT ALL? I don't understand...

pump in a boiler:


But Vaillant officials had sold a new pump, and their domestic representative (serviceman) said that he can (will) change pump (whole pump, with metal head and plastic/ceramic snail)

Please explain me, what to do?

Thank you for your attention.

And I am, yes, in Russia.