Frost Stat Wiring for multiple zone valves

18 Dec 2010
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United Kingdom
I am planning to fit a frost and pipe stat to my boiler located in my garage. I am pretty sure I understand the wiring required to fire up the central heating in the event of the frost stat kicking in.

In addition to the boiler the hot water tank and a heat exchanger for a pool are located nearby both on separate zone valves but both on the HW channel of the programmer. Am I correct in thinking that if I wire the output from the pipe stat to the live on all of the zone valves the this will create a link between the CH and HW channels when the programmer is in use.

If this is correct any suggestions on how to overcome this, or do I just need another frost and pipe stat set.

Thanks is advance for any replies
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Just connect it one zone of your choice to protect the boiler.

If you do all the valves you will need a four pole contactor, probably overkill.

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