Zone valve

[ambrosia]

what is the 6th wire on a honeywell zone valve
is it as i suspect not used on a w plan and can i wire a replacement 5 wire to an existing 6 wire zone valve

also is the motor and mechanical fitting on a 22mm vone valve the same as a 28mm

got a 28mm 6 core motor to replace, and today just recycled a 22mm 5 wire from another job

hoping i can save some money and install that one instead

 

[GasmanxxxR1]

I know the wire serves no purpose on an s plan system - hope this helps

 

[ambrosia]

i meant s plan, sorry long day

am i right in thinking the white one is the useless one

 

[Simon F]

the spare white on the 28mm gives a power when closed
it is for variations on gravity setups (I think)
is it currently being used? if not then its not needed

 

[stevetheplumber]

insulate the end of the white wire it becomes live at some point

 

[ambrosia]

thanks guys

are the motor heads interchangeable between 22mm and 28mm valve bodies

 

[tamz]

The 6 wire 4043's have a relay inside them. Normally used on C plans where the valve is fitted to the hw side wired like this


On an S plan it will go live when the valve closes so stick it in a spare terminal.

Don't know if the heads are interchangable as i've never swapped a head yet on a honeywell. Either the motor or the microswitch that fails and can be fixed in 5 minutes and if it is the valve you are swapping the lot anyway.

 

[Nostrum]

Yes they are, I have done it the other way around (had a 28mm kicking about and used the head to replace a 22mm)

 

[DaveTidy]

Page 10,11 and 12 of the Honeywell issue 16 has some good internal diagrams:

http://www.google.co.uk/url?sa=t&rc...=D9pF9L97N94MfGiNCtNynQ&bvm=bv.53899372,d.d2k