Best pump for a 55 radiator closed pressure central heating system.

[Jack Gill]

Hi !
new to this forum ..so please be gentle !
problem

1. rads heat up slow
2. never totally hot
3. furthest rad get cold warm cold warm
4. some rads get hot then cool quickly..
5. rads are not warming up
6. outside temp compensator is used
7. rad circuit set at 22 degrees

following facts.

1. veismann boiler 66 kw gas
2. 55 rads in total
3. basement and 3 floors to cover.
4. 32 mm pipe reduced to 16 mm at rad outlets.
5. all fitted with TRVs
6. 600 h x 1000 m long rads
7. present pump is a wilo 25/50 pump.

Question./ Solution

1. what pump would suit best
2. wilo or grundfos ?
3. 32 mm - 100 ?
4. grundfos magna 1 or 3
5. wilo stratos ?

which is the best solution for a good efficient running system.
thanks
jack gill

 

[Ermintrude]

Disable weather comp and turn boiler upto max. Upload a picture of ufh manifold.

Sounds like boiler undersized . Is it open vent or sealed system. You need a second boiler as when that system is on full tilt it's going to struggle.

I'm available for a working holiday £4.5k should cover my expenses for a week??

 

[IDCHAPPY]

I'll join you.

 

[happyflyer]

Jack,

Your email box is full I can't send you any massages ????

 

[Killy Bing]

Can pay me to go over and sort it out, from what you have said it needs a different set up.

a bigger pump alone isn't going to help you one bit by itself!

haa ermi ill join you.

 

[vern]

Jack are you an engineer?

 

[Gray0689]

Howsie, why you out, no challenge like a real one :50:

That's not a challenge
It's either a wind up or it's a real balls up

 

[justalex81]

you can't run 55 rads off of 32mm flow and returns when it's -10 outside so here's your 1st problem.

The pump in the boiler will not be up to the job. Do you have hydraulic separation and an additional pump for circulation?

55 rads on one zone with 1 stat?

 

[Ermintrude]

Can pay me to go over and sort it out, from what you have said it needs a different set up.

a bigger pump alone isn't going to help you one bit by itself!

haa ermi ill join you.

Fine I'll cook u can wash up.

 

[Howsie]

Howsie, why you out, no challenge like a real one :50:

The challenge had nothing to do with the setup, more the customer in this instance.

 

[Barry98]

The challenge had nothing to do with the setup, more the customer in this instance.

Evening sick note

 

[Howsie]

I was just about to post a picture of my infected wound but decided against it at the last moment.

 

[ADM360]

It does sound that there are more than a couple of issues with the set up the pump possibly being 1 of the.

You could look at separating the floors out and fitting an individual pump to each circuit, less work for each pump and if one fails still got the other 3 floors going!

You say you keep adding apartments and rads, every time you added a rad did you take the flow and returns back to the primaries of from the nearest feeds?

Are all the rads in the system re-balanced when you add a new one?

The rads are 600 x 1000 are they sized for the room at -20 you want bigger than standard I would think, our calcs work on about -5 I think.

Is the underfloor ran from the same boiler as the 55 rads? rads pulling 100ish KW how much does the underfloor pull all from a 66kw boiler?

Just a couple of thoughts for you to mull over!

 

[mickie]

someone should have spent some time designing this system before they started..

 

[happyflyer]

I think he's got the message, help cannot be at hand with such a mess, must be something to do with that EU we are in,
I know how I am going to vote if I am still alive.

 

[Jack Gill]

Hi its cleared now inbox is empty thanks
jack