Vacuum Pump Question

[boshuter]

I finally got my chiller all assembled and hooked up my vacuum pump last night to start vacuuming it down. After about an hour of run time my pump gets very hot, hot enough you can't put your hand on it. Is this normal? I'm afraid to let it run long at that temp. I've been pumping an hour, letting it set holding vacuum then pumping another hour after the pump cools down. Will this result in a good vacuum? The pump is a Robinair model 15234, the pump has new vacuum pump oil and was run according to the manual.

Any advice is appreciated :)

[RussC]

The heat is from the electric motor in the pump. It will get very hot. I believe its OK. But if you like the heat to stay low, cycling is perfectly fine. it will vac just fine that way, no issues.

In my separte pump, the motor gets way hot(like yours), the pump real cool.

RussC


I finally got my chiller all assembled and hooked up my vacuum pump last night to start vacuuming it down. After about an hour of run time my pump gets very hot, hot enough you can't put your hand on it. Is this normal? I'm afraid to let it run long at that temp. I've been pumping an hour, letting it set holding vacuum then pumping another hour after the pump cools down. Will this result in a good vacuum? The pump is a Robinair model 15234, the pump has new vacuum pump oil and was run according to the manual.

Any advice is appreciated :)

[johann]

My pump gets quite hot also but no need to cycle it. I have run it 12 hours a go and no problems here.

The heat does come from the electric motor mostly and they are specced to run quite hot.

[boshuter]

I appreciate the advice guys..:) Just didn't want to take any chances, these things are too expensive to let one burn up ;)