switchmaster valve

[rogerm]

i have a switchmaster midi valve actuator VA1 that has given up
can someone help me to locate another or do i have to change completely
what is compatible with the least amount of work involved

 

[hi-spec plumbing heating]

i have a switchmaster midi valve actuator VA1
can someone help me to locate another

you'll be lucky

 

[giblets]

When Switchmaster were bought out by ACL, ACL, in their wisdom decided to cease production of the VA1. IMO a very stupid commercial move as there are thousands if not hundreds of thousands still out there and at £90 a time for the actuator......

That's what happens when accountants not engineers run companies.

I normally change them for a Honeywell Mid-position valve. Let me know if you need the wiring change details.

 

[namsag]

These actually went out of production pre 1993 but bits where floating about for years. usually at least one pipe need altering unless thee is a lot of play on it.

The one you will be taking out has 6 wires replacements have 5 or 4

 

[TrickyP]

I have replaced my 3 port valve with a Honeywell 3 port mid postion and have the situation of orignal 6 wire connection to 5 wire and not working properly.
I have connected the wiring as per a post i found but the central heating when activated turns the boiler on and the pump so that works fine but when i activate the heating side the valve moves but does not tell the boiler to come on. I have a spare black wire that when C/H is on there is zero voltage and when the H/W is activated the voltage is 240vac but having no wire connected i think this is my problem. Does anyone know how this wire is used to turn the boiler on or where i have gone worng please?

Thanks in advance for your help.

Richard