I have a 3HP Copeland Med Temp unit that the compressor won't start all
of the time. When it does start, the amp draw is good, capacitors all
check good, so I'm thinking the start relay is going bad. If I can't
find the exact relay, (it's pretty old), would one of the "Universal"
types work? I see one in my Grainger catalog. How do you set them? I
see something in the description about drop- in and drop-out voltage.
The condensing unit is 208V. The numbers on my old relay are:
3ARR3MARS64 M&A 19003. Any help much appreciated.
Christopher: consider you self lucky that you are not
living in this part of country, I have being working
on systems that should have 208 after customer
burn up some wiring they call for service only
for me to find that are running on 195-7 and are wondering
why is it that unit is not working properly, this is not
one place it is practically across eastern part of country
90% are running below 205 which isn't enough for 220 machines
this year I replace few compressors because of
the low voltage when the equipment blow fuses
you would think that some one would check for that
oh no that is to much to ask so good for me
they are paying for it
Yes, it's fun to joke about 240 volts only being for eastern states.
It's sad that the equipment is burning up from low voltage. And I'm
pleased you have the skills to check. Something I ought to do from now
on, check the line voltage as part of any clean and check.
Christopher A. Young
You can\'t shout down a troll.
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