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Viper Gas

Plumbers Arms member
Plumber
Gas Engineer
Aug 28, 2010
176
4
18
Hello a customers heating control system needs to be rewired with new programmer and mid position valve.
Boiler is a Vaillant ecomaxpro
Mid position valve is a Honeywell 5 wire
The room stat is a three wirecylinder stat with the word imit on the case.

It is unclear how to wire up the boiler since it requires additional connection eg...pump live..switched live..pump neutral ...can anybody help with the boiler..cylinder and room stat connections
?????

Cheers..mwrrybxmas and happy new year...dd368
 
Last edited:
Google for the Honeywell Wiring Guide; issue 16. You should find the answer there sunshine.
 

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