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2.5 — ELECTRICAL CONNECTION
WARNING: Ensure that incoming power to the pump is off before wiring the motor or altering the wiring. Electrical
connections must be done by a qualified electrician in accordance with the applicable safety regulations.
Wire the motor for the correct supply voltage via connections in the junction box. See the wiring diagram on the motor
or in the junction box. For proper connection, a suitable motor protection switch must be used. Set the switch in
accordance with the rating on the motor nameplate.
WARNINGS:
• If any security switch or electrical defect cuts out the pump, re-startup of the pump is only possible by hand-action.
• After connecting the motor and after each time you alter the wiring, check the direction of rotation. Observe the
direction arrow on the motor hood. During the check, the intake port should be open. If the direction of rotation is
wrong, oil may be ejected out the intake port. The vacuum system may be pressurized.
• Don’t use the motor fan for checking the rotation direction. The motor fan rotates too fast to clearly check during
operation; when it slows during shutdown, it reverses its direction.
• Briefly switch ON the pump, check if you can feel suction at the inlet port, and immediately turn off the pump. When
the pump is rotating correctly, you should feel suction at the inlet port.
• If you need to correct the direction of rotation, turn off the power supply and interchange two phases of the connection.
• We recommend checking the direction of rotation with a phase-sequence indicator.
• Prolonged running of the motor in the wrong direction of rotation will damage the pump!
2.6 — OPERATION
When removing condensable vapors, a gas ballast valve must be used. The vacuum pump must be run for 30 minutes
prior to operation with the inlet connection closed, in order to reach the operating temperature of about 165˚F (75°C).
Condensable vapors can only be processed above the minimum operating temperature. After use, the pump has to be
left running for an additional 30 minutes with the inlet connection closed, to clear the oil of condensate.
2.7 — SHUTDOWN
The inlet flange of the KSVB-pumps contains an anti-suck back valve. It closes the inlet flange when the pump is
manually or accidentally shut down, thus maintaining the vacuum in the connected system and preventing oil from being
sucked back into the system. Except as indicated in Section 2.6 (operation) there are no particular precautions for the
shutdown of the pump. If the pump must be stopped for a longer period, see Section 1.7.
SECTION 3 — MAINTENANCE
WARNINGS:
• Disconnect the power before disassembling the pump. Make absolutely sure that the pump cannot be accidentally
started.
• If the pump has pumped harmful substances, ascertain the nature of the hazard and take adequate safety measures.
Observe all safety regulations.
SERVICE AT TUTHILL VACUUM & BLOWER SYSTEMS: If you send a pump to TVBS you must indicate whether the
pump is free of substances damaging to health, or whether it is contaminated. If it is contaminated, you should also
indicate the nature of hazard. For this you must use the form which will be provided upon request. Call TVBS Service
Department for authorization to return any pump for service. No pump will be accepted without pre-authorization. TVBS
will return any pump received without a “Declaration of Contamination” to the sender’s address.
WARNING: The pump must be packaged in such a way that it will not be damaged during shipping, and that no harmful
substances can escape from the package.
