Systemlink issue.

billy_beckham

Hi Folks,
I have a Systemlink manifold which basically has a hot water supply and return and 2 zones off it, 1 for rads upstairs and 1 for UF heating downstairs. the problem is that there is no heat coming out of the unit? The pump for rads and UF are running but pipes are cold, there is deffo hot water going to it and the pumps are running but no heat being supplied.

Any ideas? Do these things fail?

Thanks...

John.G

billy_beckham wrote: »

Hi Folks,
I have a Systemlink manifold which basically has a hot water supply and return and 2 zones off it, 1 for rads upstairs and 1 for UF heating downstairs. the problem is that there is no heat coming out of the unit? The pump for rads and UF are running but pipes are cold, there is deffo hot water going to it and the pumps are running but no heat being supplied.

Any ideas? Do these things fail?

Thanks...

AFAIK the systemlink manifold is a relatively simple device, are you linking a solid fuel stove with a gas or oil boiler? if so then you will have a feed&expansion tank, have a look at that and see if it contains water. You might just have a gas/oil boiler on its own (unlikely), if so that may be a gravity or sealed system, if gravity look at the F&E tank as above, if sealed have a look at the boiler pressure etc.

You can look at a schematic of your system combination here and it may help.
http://www.systemlink.ie/schematics.html

Obviously, also ensure that the gas/oil boiler (or/and solid fuel) circ pump(s) is running as well as the zone pumps.

billy_beckham

Hi,
Its fed from a large water storage cylinder which in turn is heated by a heat pump and pellet boiler. The circulating pump feeding the system link manifold is running and the water is piping hot going to it. However the 2 feeds out to the rads and UF are barely warm.... the 2 pumps feeding these are also running. There is a PI on the manifold showing approx 1.5bar.

Can't see how its anything other than a problem with the manifold?
Everything else looks ok...

John.G

billy_beckham wrote: »

Hi,
Its fed from a large water storage cylinder which in turn is heated by a heat pump and pellet boiler. The circulating pump feeding the system link manifold is running and the water is piping hot going to it. However the 2 feeds out to the rads and UF are barely warm.... the 2 pumps feeding these are also running. There is a PI on the manifold showing approx 1.5bar.

Can't see how its anything other than a problem with the manifold?
Everything else looks ok...

I suppose it could be that but I,m afraid I can't offer any constructive advise on it, I did read somewhere on the system link site that if the quantity of water (primary) supplied to the manifold is less than the amount (secondary) removed by the zone pump(s) that you can get some form of reversed flow through the manifold by pass but if you are happy that the storage cylinder pump is pumping correctly then?... System link themselves would probably give you advice as they would have come across this problem before.
You might let us know how you get on.

Edit: I believe some of the manifold bypasses are spring loaded and others are not so maybe a build up of sludge or whatever might affect the manifold performance.

billy_beckham

Issue resolved. Called the good people at Systemlink and described the issue, they suspected a sub par performance of the pump supplying the hot water as the issue. Although it was running and pumping successfully when neither of the 2 heat zone pumps were running it wasn't performing when they started.

So replaced the pump on the supply side and all good!!

Thanks John G. for your assistance!!

John.G

billy_beckham wrote: »

Issue resolved. Called the good people at Systemlink and described the issue, they suspected a sub par performance of the pump supplying the hot water as the issue. Although it was running and pumping successfully when neither of the 2 heat zone pumps were running it wasn't performing when they started.

So replaced the pump on the supply side and all good!!

Thanks John G. for your assistance!!

So Supply = or > demand, glad you are sorted out and thanks for feed back.