Changing Honeywell Room Stat for a DT90E


Postby pollypetee » Tue Nov 08, 2016 10:10 am

Quick question guys.

I have picked up a DT90E from my local screwfix with no instructions (last in stock...)

I currently have an old honeywell with 4 wires connected:

earth
black to no2
grey to no3
brown to no1


It has A, B and C
Can anyone shed some light here for me please.

Boiler is Vailant Eco

Cheers in advance peeps.
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pollypetee
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