horstman central heating timer

[jaguar]

hi all,
i've just replaced my Randall 103E7 timer with a Horstman H17 digital timer but now ,when timed to come ON its OFF,and when timed to go OFF its ON, What have I done wrong ? anyone please.

 

[ollski]

Have you wired in the on and off on the heating the wrong way round at a guess?

 

[jaguar]

Hi ollski
Thanks for that but I replaced original wiring on boiler with new cable and copied original wiring colours,do you mean wiring on new heater control.
Thanks

 

[Soggy_weetabix]

NEVER upon NEVER follow colours!

Granted, grass is green, sky is blue etc.....

But, what colour is a chameleon (poss sic).

Ill leave you to ponder, smoke a cuban and go back to your wiring diagrams.

David

 

[jaguar]

Hi David,
Thanks for that,I dont smoke but Ill have a large JD and coke read the wiring diagrams again and then ,well I dont know.
Jaguar