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How to install a wireless thermostat Honeywell CMT921?

mkx

Joined
23 Sep 2012
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Location
Norfolk
Country
United Kingdom
Hi there
Anyone knows how to install a wireless thermostat Honeywell CMT921 to a combi boiler Saunier Duval Thelia 23?
Thanks in advance :wink:
 
Do you have an integral time clock on the boiler? Do you have the boiler installation manual?
 

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