The inlet port of the pump is covered with a plas-
tic cap prior to shipment to prevent dirt and o t h e r
foreign material from entering the pump. Do not
remove this cover until the pump is actually ready
for connection to your system.
1.2 Location
The pump must be installed in a horizontal posi-
tion on a level surface so that the pump is evenly
supported on its rubber feet. Allow at least one foot
(five feet for large pumps) of air space between the
pump and any walls or other obstructions to the flow
of cooling air.
Also, adequate ventilation must be provided for
the fans on the pump and motor (i.e., do not locate
the pump in a stagnant air location).
Whenever the pump is transported, be sure to
drain the oil prior to shipping to avoid vane break-
age when restarting the pump.
Do not tip the pump over if it is filled with oil.
Locate the pump for easy access to the oil sight
glass (Ref. 83) in order to inspect and control the oil
level properly. Allow clearance at the exhaust flange
area to provide service access to the exhaust filters.
1.3 Power Requirements
The schematic diagram for the electrical connec-
tion is located in the junction box or on the name-
plate of the pump motor.
The motor must be connected according to the
electrical codes governing the installation. The
power supply must be routed through a fused switch
to protect the motor against electrical or mechanical
overloads. The motor starter has to be set consistent
with the motor current listed on the motor name-
plate.
If the pump is supplied with a manual motor
starter, it is preset at the factory in accordance with
the customer’s specification. For other voltage
requirements, contact the factory for motor and/or
starter information.
NOTE:
See the motor manufacturer’s manual
for start-up maintenance of the motor.
Correct direction of rotation is marked by an
arrow on the motor fan housing and is counterclock-
wise when looking at the motor from the motor's fan
side.
1.4 Vacuum Connections
Use a line size to the vacuum system that is at
least as large as that of the pump inlet. Smaller lines
will result in lower pumping speeds than the rated
values.
Install a drip leg and drain on the vertical pipe
near the pump inlet. Drain the drip leg often to pre-
vent condensation from entering the pump.
If more than one vacuum pump or a receiver
tank is connected to a common main line, each
pump should have its own manual or automatic
operated shut-off valve or positive action check
valve. The built-in anti-suck-back valve should not
be used as a shut-off valve for the vacuum system.
Remove the plastic protective cap from the inlet
port prior to connection of the pump to the system.
The following threads are provided at the inlet of
the R5 Series pumps:
Pump Size
Size
Threads
0025/0040
1 1/4"
Female NPT
0063/0100
1 1/4"
Female NPT
0250
2"
Female NPT
Caution: After the electrical connection has
been made, but before the pinup is filled with oil,
the rotation of the motor must be checked. Open
the inlet port and jog the motor briefly to make
sure rotation is correct. If it runs backwards and
if it is wired three phase power, reverse any two
leads of the three at the power connection.
3
Caution: The built-in anti-suck-back valve is
not positive action; do not use it as a system
check valve.
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