Replacing mechanical central heating timer

[Glastoun]

We have a Drayton SM1, which makes the usual mechanical ticking:

http://www.heatingcontrolsonline.co.uk/acl-drayton-sm1-timeswitch-p-704.html

It's in our kitchen, so looking to upgrade it to something silent. Do all timers use the same wiring, or should I look for something specific?

In fact, that website shows another timer that use the same backplate and wiring - would it really be as simple as unscrewing the existing front and replacing it with something like this?

http://www.heatingcontrolsonline.co.uk/acl-drayton-invensys-lifestyle-lp711-timeswitch-p-186.html

 

[45yearsagasman]

Yes, straight swap. It even says that on the link you provided.