CH and immersion timer in single unit?

I have done this a fewe times, normally for panel heaters and immersions. You would need to use a contactor on the output of the time clock for the HW. The contactor would switch the immersions load (on it's own circuit). It's probably easier to get an enclosed contactor that's ready to go - A quick google gives this one: http://www.ebay.co.uk/itm/300785785958

 

I have never done this myself but you could use a contactor on the load side of the timer for the HW and the contactor would be ok to switch the immersion heater on.

 

No worries Eric.

 

Eric you've answered your own question. Without a doubt, two seperate timers is the way to go.

 

Quoting:
"I believe thats what I just said! Are you so up yer own **** you never read anybody elses posts."