Exhaust
Inlet
Exhaust filter
Gas ballast
(RA)
Rotor
Anti-suckback valve
Inlet screen
Vane
Automotive type
spin-on filter
Main oil feed line
Exhaust valve (RA)
Oil return valve (RA)
Oil sight glass
Oil return line to
inlet (RC)
Fig. 1 - Basic R5 Pump
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 counterclockwise 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 prevent conden-
sation from entering the pump.
If more than one vacuum pump or a receiver tank is con-
nected 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 vac-
uum system.
Remove the plastic protective cap from the inlet port prior
to connection of the pump to the system. Vertical con-
nection of the vacuum line can be made directly to the
pump inlet (Ref. 260).
The type and size of the inlet connections of the R5
CAUTION: After the electrical connection has been
made, but before the pump is filled with oil, the rota-
tion 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.
CAUTION: When using PVC pipe or any static
enhancing material for the exhaust piping, make
provisions to safeguard against arcing from static
electricity. Arcing can ignite oil vapor that may be
present.
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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