When an unvented is added to an installation which already has a three port valve there are several different ways that the two port safety motor valve can be wired up to the system.
Does anyone know which is the "prefered" method?
Do any of the unvented manufacturers advise on any particular common method?
Tony
Does anyone know which is the "prefered" method?
Do any of the unvented manufacturers advise on any particular common method?
Tony