Vertical Radiator not getting hot enough

[dlukeg]

I've recently fit a new vertical radiator and I'm having problems with it.

When most of the radiators are on in the house the new vertical one doesn't get anywhere near as hot as it should and is noticeably warmer at the top than the bottom.

When I turn off all radiators except the vertical one.. it gets incredibly hot and works fine.

I don't suppose there is an obvious quick fix for this?

I'd appreciate any help you can offer.

Thanks.

 

[Riley]

Has it been piped correctly? Some of these are very specific that left is flow right is return or vice versa?
Failing that it could just be balancing. If you turn off all other rads does this one get properly hot.

 

[Sparkgap]

I agree, sounds like rebalancing needed.

 

[dlukeg]

The radiator does get properly hot when all the others are turned off. Does that rule out the possibility that the flow and return are on the wrong way? Thanks for the suggestions.

 

[Halesowen1]

Looks like balancing the system then.

 

[Riley]

I would say almost definitely a balancing issue then unless the boiler isn't man enough for the job

 

[dlukeg]

Thanks for the help. I'll let you know how I get on with the balancing.

 

[townfanjon]

Have you fitted it where an existing one already worked ? Or have you added it new to your system ?

 

[Chalked]

As above.
Has this radiator been added to the system?

Microbore ?????!

 

[townfanjon]

Microbore ?????!

Great minds lol

 

[dlukeg]

The radiator has replaced an old smaller one.

 

[SimonG]

What size pipe?

 

[Riley]

What's your boiler how many rads

 

[dlukeg]

8mm pipe and the boiler is a ravenheat condensing fanned combi CSI 85 B (T) with 8 rads.

I've only just moved in to this house so don't know much about it I'm afraid.

 

[AndyTh]

I am no expert - however I have a similar problem.

What type of vertical radiator is it. I have Vertirad (from B&Q). This is made up of vertical tubes that connect to a hz tube at top and bottom. The connection from the vertical tubes to the hz tubes appears to be quite a small hole. I think these can get blocked - even when brand new (welding or coating debris?). We had to flush new radiators and that improved one of them, one is still very poor.

The other thing to be aware of is there is a top and bottom. The bottom pipe should have a baffle in the middle to force water up and then down. If installed upside down it may not work so well.

 

[dlukeg]

Balancing has definitely helped make the rad a lot warmer. Still not quite right but probably just needs a bit more balancing. Thanks for all the help.

For AndyTh - The radiator is a Milano Aruba - White Vertical Designer Radiator 1600mm x 354mm (Double Panel) from bestheating. I am assuming everything was fitted correctly as it does get properly hot when it is the only radiator on and now that the system is being balanced it is much much warmer than before.

 

[Halesowen1]

These style rads do take a lot of heating as they are generally a thicker material than standard rads, rads can take just 5 minutes to be very hot where these can take 20-30.