honeywell v4073a wiring plan

[Percyb]

The old manual midi switch on my central heating is leaking and I wanted to fix on a motorised honeywell v4073a mid positioned valve which I have.I have no cyl stat or room stat but just the boiler,pump,mid position valve and switchmaster 400 clock.Could someone please tell me where the wires on the valve are connected up to.
Thanks you.

 

[Softus]

If you want a Y plan system then you need the supporting components to make it work.

The Switchmaster 400 is a single channel timer, so without thermostats there is no way of selecting CH only or DHW only, therefore fitting the V4073 would be pointless.

 

[ChrisR]

http://content.honeywell.com/uk/homes/Catalogue/Sundial Plans/3.4 Y Plan.pdf

 

[Percyb]

If you want a Y plan system then you need the supporting components to make it work.

The Switchmaster 400 is a single channel timer, so without thermostats there is no way of selecting CH only or DHW only, therefore fitting the V4073 would be pointless.

thanks softus for your help.

 

[Percyb]

http://content.honeywell.com/uk/homes/Catalogue/Sundial%20Plans/3.4%20Y%20Plan.pdf

thanks Chris R for your help.