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Thread: variable frequency drive
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30-08-2006, 10:03 PM #8
Re: variable frequency drive
We have put some on recips, but the one thing you have to watch out for is the minimum RPM that the compressor can run at. Most ammonia recips have internal oil pumps, they also have a minimum GPM of oil supply needed to keep bearings happy. So there is a limit to the minimum RPM on ours it is between 400 and 600 depending on the amount of cylinders. If you venture below that you can install an external oil pump.
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