and maintenance. A vertical distance of 24” is
required above the modules for ventilation and
maintenance.
Adequate ventilation is required. The pumps are
air-cooled. Therefore it is important to choose
a location with an ambient air temperature
between 40
˚
F and 105°F (if the maximum
ambient exceeds 105°F, contact factory for
special instructions). Also, the area must have
clean air and be well ventilated, free of dust and
corrosive vapor.
The system should be located as close as possible
to the point of usage to prevent excessive loss of
operating vacuum due to pressure drop.
When selecting the location for the system,
remember to keep in mind the requirements for
service, such as cleaning, changing
fi
lters, and
changing oil.
2.4 Locations Above Sea Level
All vacuum pumps above sea level have reduced
fl
ow and should be de-rated. After determining
the correct
fl
ow needed for the laboratory
vacuum system, multiply this number by the
adjustment factor located in Table 2.1. After
determining the new
fl
ow required, use this
number to size the laboratory vacuum system.
2.5 Electrical
Requirements
Refer to the electrical diagram provided with
the unit before starting any installation or
maintenance work.
Do not operate vacuum pump on a voltage other
than the voltage speci
fi
ed on the control panel
nameplate.
All customer wiring should be in compliance
with the National Electric Code and any other
applicable state or local codes.
Refer to the wiring diagram(s) that came with
the vacuum pump system for pertinent wiring
connections.
Check the control voltage, phase, and amp
ratings before starting the electrical installation,
and make sure the voltage supplied by the
facility is the same. The wire size should be able
to handle peak motor amp load of all operating
units. Refer to the vacuum pump system full
load amperes on the wiring diagram.
WARNING:
During operation the surface temperature of
the pump can exceed 70° C (158° F).
Table 2.1 Altitude Adjustment Factor
WARNING:
Be sure that all power is turned o
ff
prior to
performing any work on the electrical panel!
WARNING:
All electrical connections should be made
by a quali
fi
ed, competent electrician in
accordance with all local and national codes.
Altitude (ft)
Normal Baro-
metric Pressure
(inches HG)
Multiplier Used for
Required SCFM
0
29.92
1.00
500
29.39
1.02
1,000
28.86
1.04
1,500
28.33
1.06
2,000
27.82
1.08
2,500
27.32
1.10
3,000
26.82
1.12
3,500
26.33
1.14
4,000
25.84
1.16
5,000
24.90
1.20
6,000
23.98
1.25
7,000
23.09
1.30
8,000
22.23
1.35
9,000
21.39
1.40
10,000
20.58
1.45
Lubricated Rotary Vane Laboratory Vacuum Systems
4107 9021 88.01
2-2
