combi external controls

[ac]

Please can any one help

I want to fit an external time clock to a baxi 105 he boiler

What clock do I use and what are the correct connections to the boiler itself

 

[gas4you]

Any single channel timer will do. Follow wiring diagrams in MI's.

 

[namsag]

If you already have an inbuilt clock you will have to leave this on constant after you fit external one for boiler to work properly. Horstman c11 is a good clock, siemens rwb range is ok too as is acl . the wiring diagram in boiler instruction book and instructions for whichever timer should be read together piece of cake to wire