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Discuss Hot Water only comes on if Heating is on? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Hi Guys,

I've just bought a new property which has a gravity fed system with Worcester Bosch boiler which was fitted around 7 years ago.

I've replaced the copper cylinder for a CenterStore 210L Unvented Pressurised Cylinder but I haven't pressurised my heating, just the water only.

My plumber had issues with the wiring saying it's due to there not being a permanent live in the aeran cupboard (where the cylinder is).

Now my Hot Water only comes on if my heating is on?...but then I have to turn the thermostat right down as I don't actually want the heating on!

Any advice on this?...I also want to install a Nest or Hive but want to get this issue sorted before I get that installed.
 
When you say gravity fed are you on about your heating is fed from tanks in the loft. Not that the boiler heats the water on gravity.
 
Any pics of the install ? Eg cylinder and boiler
 
Haven't got any of the boiler but will get some tomorrow but here is the cylinder.

boiler.jpg


boiler 2.jpg
 
TBH I would try and re wire it and convert to an s plan then you free up a spare core eg hot water finished which becomes your perm live now
 
Im newish to this side of the business. I don’t understand why there is a need for a 2 port valve for the hot water, after the 3 port valve, which is also on the same circuit as hot water. Anyone able to explain?
 
I do not know why you have a motorised valve on your coil feed, when there is a 3 port from the pump??? Either take it back to it's original Y plan or better still convert it to S plan. All the wires you need are there already, as you have the 3 port installed. I think you need to get a GSR in that knows how to correctly wire up heating systems.
 
The 2 port has to be installed for the unvented. You see it quite a bit. Personally I would of converted it to an a plan but you can do it this way.

You need to double check your wiring.
 
Thanks for your response guys. Am I better off getting an electrician in or a Gas safe registered plumber? I’ll get them to install the Nest at the same time.

My electrician is in the house later today so he said he would have a look for me.

House is getting ceilings skimmed and repainted etc so would rather get this work done now.
 
Depends on if the spark knows how to wire heating
 
A lot of sparks now understand heating systems as a lot are doing more and more as they are getting more and more complicated I know loads of plumbers that wont go near the wiring.

Ask them to have a look whilst their there.
 

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