I have a ferroli optimax HE plus 31C combi boiler and I am trying to fit a Drayton RTS4 room stat.
There are only 2 wires that come from the boiler and when conected to the room stat terminals 2&3 nothing happens. This is a volt free stat. should it work with just those 2 connections? When looped together the boiler works fine.
There are only 2 wires that come from the boiler and when conected to the room stat terminals 2&3 nothing happens. This is a volt free stat. should it work with just those 2 connections? When looped together the boiler works fine.