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Three Phase Motor Connection
CAUTION
The pump can be configured for low voltage, 200 VAC to 230 VAC, or for high voltage, 380 VAC to 415 VAC and
460 VAC. As supplied from the factory, the pump is configured for low voltage. Figure 5 shows the electrical connections
for three phase motor.
1. Verify the electrical supply voltage.
2. Remove the three screws (item 12 in Figure 3 on
page 35) that are holding the motor electrical cover
(item 13 in Figure 3).
3. Refer to Figure 5 to connect the motor to match your
supply voltage.
Use a 16/4, 600 V power cord, H07RN-F or
❑
equivalent.
Strain relief the power cord with a 1/2" NPT
❑
male cord connector, Hubbell SHC1023CR or
equivalent. Attach the male cord connector to
the 1/2-14 NPSM hole next to the motor
cover.
TriScroll 300 Series Vacuum Pump
Wire the motor and electrical interlocks (if applicable) in accordance with local
electrical codes and the relevant electrical component manufacturer's instructions.
Be sure to disconnect the electrical supply before rewiring for a different voltage.
Be sure the pump is wired correctly before applying power. A voltage mismatch
can damage the pump.
Figure 5 Three Phase Motor Electrical Connections
4. Wire L1, L2 and L3 per Figure 5 using uninsulated
double-crimped, flag connectors, T&E Connectivity
41531-1 or equivalent.
Ensure that no exposed wiring is close to the
electrical cover or to other terminals on the board.
5. Secure the ground wire under the ground screw using
a ring connector.
6. Install the motor electrical cover and secure it with
three (3) screws removed in step 2.
7. Momentarily switch on the pump to verify proper
rotation.
With the inlet uncovered, a strong air flow should
come out the pump exhaust. If there is no flow out
the exhaust, reverse any two of the leads (L1, L2
or L3).
8. Repeat the test to verify correct rotation.
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