Location Is Paramount
Placement and location are critical. The vacuum pump, or system, must be placed as close to the process or point of use as possible. Distance around the unit must be sufficient for cooling air flow as well as allowing service access. Cleanliness is critical. A dust and debris location is critical. Dirt and debris will soon clog the fins of the heat exchanger surface. Dirt on the surface of the unit will also cause elevated operating temperatures.
Pipe Size Is Critical
A common misconception is that since there is very little flow at higher vacuum a small pipe will suffice. This is not the case. Inlet pipe must be at least as large as the inlet fitting of the pump. A long pipe run requires the use of a larger diameter pipe. Long radius elbows are the preferred method of direction changes in the piping system. Standard elbows increase flow resistance. Long pipe runs combined with standard elbows will, in certain circumstances, require the use of a larger vacuum pump just to overcome piping related pressure drops.
Electrical Service
Electrical service is also different for a vacuum system. While the inrush or locked rotor amperage is the same as for most any other electric motor application, the amp draw quickly falls off then increases as the vacuum level increases. An inverted Bell curve is the best and most accurate description.
An additional concern is the type of vacuum system selected. Rotary vane vacuum systems differ considerably from rotary screw vacuum systems.