can anyone tell me how to allow my underfloor heating stat to fire my boiler.I have a 24v Broag heating boiler which is controlled by a switched live from my Honeywell y plan system.I connected another switched live from my conservatory ufh stat and the rcd protecting the boiler tripped out.I have rechecked my wiring and controls,all ok.The manual schematics do not cover this situation.
underfloor heating controls
- Thread starter gle
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Hi,honeywell mid position valve supplies dhw and rads,ufh is run off a manifold comprising,manual mixing valve,pump.Stat in conservatory is 240v and controls pump.I have a 2port zone valve to be fitted to manifold next to pump.rcd works ok with existing y plan system and ufh system works ok with rcd.When switched on together,rcd tripps.i suspect that the y plan will not work regardless of however i wire it.do you think i should fit 3 2 port zone valves on the rads,ufh,and dhw.Thanks for your help,Garry
Clearly it IS something you have or have not done!
You will find difficulty operating a UFH circuit in conjunction with Y Plan you should consider changing to S Plan - (2 port Valves)
You will find difficulty operating a UFH circuit in conjunction with Y Plan you should consider changing to S Plan - (2 port Valves)
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its possible to run ufh with the system using a three port valve but its not the easiest thing to wire up as you need a blocker 2 port valve, if your doing the installation yourself its easier to use 2 port valves, it simplifies the wiring.
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the 2 port valve under the 3 port is known as a blocker valve, its to stop unwanted circulation as you cant close both ports on the 3 port at the same time.
the 2 port valve under the 3 port is known as a blocker valve, its to stop unwanted circulation as you cant close both ports on the 3 port at the same time.
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