"TheScullster" wrote in message
. uk...

"Mike Barnard" wrote..


My Worcester Bosch boiler cannot be activated by external zone
controls. So says the techie's at WB themselves.

Which model boiler do you have?
I have a 24Ri condensing non-combi which serves 2 heating zones and 1 hot
water zone.

The end switches on the zone valves can be a part of the room stat circuit.
All off the boiler is off. The time clock energises the zone valves.