Williams System 7 110v to 220v Walk Through

[Solar Sailer]

Has anyone converted a system 7 machine to 220 from 110v?
I've read its a jumper change but only ever see the 220 to 110 reimport posts on the Internet.

I'm after a simple guide with maybe photos of a pointer finger in and around the transformer!

 

[Pick Holder]

Do you have a molex pin removal tool ?
You will need one of those.
Main fuse needs changing, and also a varistor.

Look at the schematics in the manual - all the taps are listed and the value of fuses/varistor.

Install a brand new flex (3 core)
In the USA they use BLACK for LIVE (our Brown), and WHITE for NEUTRAL (our BLUE). Green and yellow is of course ground.

 

[Solar Sailer]

Do you have a molex pin removal tool ?
You will need one of those.
Main fuse needs changing, and also a varistor.

Look at the schematics in the manual - all the taps are listed and the value of fuses/varistor.

Install a brand new flex (3 core)
In the USA they use BLACK for LIVE (our Brown), and WHITE for NEUTRAL (our BLUE). Green and yellow is of course ground.

I have access to one yes.

Yep the existing varistor will pop so plan to replace that and I have a 3 core supply cable ready with an in line socket so if i take the head off I can store the cable too safely.
The manual has the details and what I need to move but always handy to have a wingman.

It mentions a low line condition of 210v and a high line condition of 240v?

 

[Andy_B]

Maybe post the schematic. It will be much easier for someone to point out what you need to put where.

Sent from my SM-G960F using Tapatalk

 

[Solar Sailer]

Details below

 

[Andy_B]

Where is 6P1?

Sent from my SM-G960F using Tapatalk

 

[Pick Holder]

set it for 235v

 

[andy]

As mentioned make sure you replace the main fuse with one of the correct (lower) rating for UK voltage.

I did this change to a System 7 a while ago, when I did I also changed the line input filter which seemed sensible as it’s a 40 year old part which can and does fail.

 

[Solar Sailer]

Where is 6P1?

Sent from my SM-G960F using Tapatalk

Ah two transformers...