Got a little bit of an issue with a few rads on the bottom floor and wondered if this pump (Wilo Gold RS50) is sized correctly. Brief discription of my property:
1) Its a 3 story vented system with a header tank in the loft
2) In total there are 16 radiators in the house
3) Its an standard S plan system
3) Its a 28mm main trunk from the boiler (1st floor) which goes up to the 3rd floor airing cupboard. In this cupboard is a Wilo Gold RS50 (Built in 2009, speed rating 3 uses 65w, i've for some reason seen RS50's with diffrent wattage). Eventually it goes down from 28mm to various 22mm to 10mm manifolds or 22mm to 10mm in line T's.
When we moved in in 2016 the manifolds for the supply side were replaced as some of them were blocked preventing some rads getting any water. I roughly balanced the rads via the lock valves so that all the rads came up to temp at the same rate. Below is what i set the lock valves to:
I'm not a pump/flow expert but is that pump really up to the task of a system this big? Its not been much of an issue for us because we rarely use the 1st floor but my wife is on holiday this month with my kid and I decided to turn off various rads i know i won't be using via the trvs. (5 of the 7 upstairs ones are off, 3 of the 6 middle floors are off and 1 of the 3 bottom floors is off). The rads downstairs get noticeable a lot warmer and the temps are more plesant on that floor. Is it possible i need to re jiggle my balancing and start off on a 1/6th turn or even 1/8th? I was kind of leaning towards the conclusion that given these lock valve figures i shouldn't have to turn off half the rads for the last ones on the bottom to get warm and that it was a pump sizing issue?
1) Its a 3 story vented system with a header tank in the loft
2) In total there are 16 radiators in the house
3) Its an standard S plan system
3) Its a 28mm main trunk from the boiler (1st floor) which goes up to the 3rd floor airing cupboard. In this cupboard is a Wilo Gold RS50 (Built in 2009, speed rating 3 uses 65w, i've for some reason seen RS50's with diffrent wattage). Eventually it goes down from 28mm to various 22mm to 10mm manifolds or 22mm to 10mm in line T's.
When we moved in in 2016 the manifolds for the supply side were replaced as some of them were blocked preventing some rads getting any water. I roughly balanced the rads via the lock valves so that all the rads came up to temp at the same rate. Below is what i set the lock valves to:
Code:
Floor Manifold Room Lock valve (open)
Top Master 0.25
Top Master ensuite 0.25
Top Double bedroom 0.25
Top Bathroom 0.25
Top Rear Single room 0.25
Top Front single room 0.25
Top Hallway 0.25
Middle 3 Dining room 0.5
Middle 3 Living room front 0.5
Middle Living room rear 0.25
Middle Kitchen 0.5
Middle Hallway 0.25
Middle Conservatory Closed
Bottom 3 Hallway 1
Bottom 3 Rear room Full
Bottom 3 Shower room 0.5I'm not a pump/flow expert but is that pump really up to the task of a system this big? Its not been much of an issue for us because we rarely use the 1st floor but my wife is on holiday this month with my kid and I decided to turn off various rads i know i won't be using via the trvs. (5 of the 7 upstairs ones are off, 3 of the 6 middle floors are off and 1 of the 3 bottom floors is off). The rads downstairs get noticeable a lot warmer and the temps are more plesant on that floor. Is it possible i need to re jiggle my balancing and start off on a 1/6th turn or even 1/8th? I was kind of leaning towards the conclusion that given these lock valve figures i shouldn't have to turn off half the rads for the last ones on the bottom to get warm and that it was a pump sizing issue?
