I need to fit an additional 2-port valve with a room thermostat to zone an extension.
I was advised that the room thermostat - 2-wire - should switch the grey coming from terminal 1. The valve is a V4043 which is shut when power is off.
On a wiring diagram from Honeywell I saw the brown wire switched from the grey which makes more sense to me. If the brown is life from terminal 5 permanently the valve will be open all the time, won't it.....?
I was advised that the room thermostat - 2-wire - should switch the grey coming from terminal 1. The valve is a V4043 which is shut when power is off.
On a wiring diagram from Honeywell I saw the brown wire switched from the grey which makes more sense to me. If the brown is life from terminal 5 permanently the valve will be open all the time, won't it.....?