Discuss Heating pump twin wiring in the Central Heating Systems area at ElectriciansForums.net

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Hi I have oil boiler and a wood stove, both are plumed in to the central heating system, when they first fitted there was a manual switch for the stove fed to the pump, and a feed from the boiler . So I could use the stove or the boiler the hear the radiators. When I got a new boiler fitted and we just want to use the stove the boiler now turn itself on. Any idea why this is happening.
 
I think lee hit the nail on the head
When the boiler was changed was the installer aware of the stove and the need for the pump to run independently of the boiler?
Is it a combi boiler or a system boiler?
 
I may be wrong but as far as I am aware modern combi boilers are sealed system now so not sure how that would work with a wood burning stove that would require to be connected to a vented system.
 
Yes it must of had a tank ,as a stove would not likely heat water on demand . What type of boiler was replaced?
 
Will need a relay so both your manual switch and the boiler can start the pump independantly, but system boilers have the pump within the boiler so im not sure its possible or how its plumbed
 
Was it just the boiler replaced, or has there been additional motorised valves put in or a new programmer?
These wiring centres can get extremely complicated. It might be just one conductor in the wrong terminal.
Should have been a straight swap?
Its been corrected that this is a system boiler so the pump is separate.
 

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