Honeywell zone valve

[marmaduke]

I need to replace an old sticking Honeywell V4043 2 port zone valve. I already have a new spare handy, but it is missing a wire. The old one has a total of 6 wires: blue, brown, gray, white, orange and green/yellow. The new one, and subsequently the only one my local merchant sells, is missing the white wire. Does anyone know if it's possible to install the new one even though it's missing the white wire, or do i need to source one with the correct wires?

 

[seco services]

what type of systems it on ?

 

[5TIMES]

no white wire req mate

N= NEUTRAL

G/Y=EARTH

GREY=LIVE (240V) PERMANANT

BROWN=S LIVE (240V) FROM EXTERNAL CONTROL

ORANGE= (240V) TO BOILER/PUMP

 

[seco services]

no white wire req mate

depends on the system.

 

[tamz]

The valves with the white wire are 28mm. 22mm has no white. The white wire when present is normally isolated safely as it becomes live when the valve closes. On 28mm valves it is used on a C plan.

 

[marmaduke]

Thanks all for your replies. As far as what type of system i'm not sure what you mean. I'm only a general builder who dabbles a little in plumbing, so far as i've wired and connected up complete new systems, but would only describe this old system as being the the most common i normally come across. It consists of, boiler, pump, programmer, wall stat, tank stat and seperate zone valves for heating and hot water. I thought it was all 22mm but may have been mistaken? I haven't got a clue what the wiring plan/type is, but it was first installed in 1973

 

[petit_pablo]

Thats a standard S plan system.

Check where the current one goes, will most likely be in a spare terminal. Do the same with the new valve.

 

[gas112]

Are you sure the white is an actual wire and not just a central strand the others are wrapped around would not be the first to miss this.
BUT if it is do as tamz and petite suggest