Thermostat on Worcester

[thegrange]

Hi
I'm looking for advice to assist in the wiring of a thermostat and seperate simple 7 day timer to a Worcester ZB 7-28 R29 HE condensing boiler.

I have an outdoor above ground pool and heat exchanger that flow from the boiler is directed through. (The house has it's control panel seperately for the central heating)

I have wired this simple timer to control the thermostat on and off, and the thermostst probe sits in the heat exchanger, but I wanted to know where to wire in the switching from the thermostat on the boiler? Do I simply piggy back on the same switching from the house control? Or is it some how auxilirey?

Timer is a CED control master model number IMTZE and the thermoatat is a digital Certikin one to go with the pool heat exchanger.

I have a plumber who has been assisting, but he seems a little baffled
Is this something a boiler engineer would assist with ?

many thanks
The Grange

 

[outinthestix]

Not familiar with this boiler but from others i have come across doing similar job the only option is to piggy back.
Stix.