y plan heating system

[peter knighting]

My heating system is y plan wiring. It has a mid position valve. I have a honeywell st699 time set. It got knocked and damaged and has stopped working. A friend has given me a drayton lifestyle lp111si time set, but with no wiring instuctions. Does anyone know if the drayton time set is compatable. Any help and advice would be greatly appreciated.

 

[Simon F]

you will need a programmer that works for ch and hw,
the one you have is best suited for a combi boiler

 

[PlumbBobBob]

agreed you need to get a two channel programmer like the drayton lp112. the lp111 will only do one channel and is not suitable for your system.

 

[Roger Welton]

Or to make life even easier, a replacement ST699

 

[PlumbBobBob]

that would work

 

[dontknowitall]

The replacement doesn't need wiring in or anything. Just remove the front half of old one and push new one on. Only difficult part is moving the plastic luggs without ripping the whole contraption off the wall.

Perhaps it's something simple like a wire coming loose?