Air Conditioning - need a wiring diagram for an old unit. Help

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vincent
09-16-05, 02:29 PM
I have a 1974 model Sears central ac on my commercial building. It's a 5 ton, Sears says it was made by Addison but says its discontinued and it's not
available from them. Anybody know where I might obtain this wiring diagram.

Thanks. this is an old unit but up to now a good one!

lenny56769
09-16-05, 08:08 PM
try looking inside unit most tech leave a copy there in unit
mattison
09-16-05, 10:35 PM
What's wrong with it?

vincent
09-17-05, 09:11 AM
The voltage is dropping out at the contacts. The compressor will run 30 minutes drop out for an hour or so, in nonsensical cycles.
Pressures are good.
Could be thermostat, heh?

Life would be simpler with this diagram. It was originally glued to the cover and has since disintegrated over thirty years of SC hot weather.

Apparently this Addison company who sears says manufactured it is history too, so it looks like I'm OOL unless someone has one like me.
Grady
09-17-05, 04:59 PM
Could be a high pressure cut out. Are condenser coils clean?
Could be the stat. Could be a lot of things.