How do you replace a switchmaster midi valve with a ????

[walton3180]

Help !!! My Switchmaster has finally broken and now I want to replace the obsolute unit with another midi valve but don't want to have to change lots of parts in the system. I've heard that you can replace it with a Honeywell system with out to much bother beyond some simple re wiring. Is this true ? and if so has anyone done it ?

 

[twgas]

I've done loads, you may have to alter some pipework; because the actuator is top mounted on honeywells, as opposed to sideways on switchmaster, some will need reorienting, some will need just a little off the ends of the pipes and some are a straight change (pipes not wires).
The wiring will need altering - the red and orange from old connect to orange on new, old yellow to new white, old white to new grey, blue to blue, green/yellow to green/yellow.

 

[walton3180]

Thank you