DEKKER Vacuum Technologies, Inc. – HullVac / September 2016
17
8
Confirm the oil solenoid valve is open. The valve’s
solenoid coil is energized whenever the motor is
energized. During initial operation, confirm valve
operation by holding a screw driver or other
metal object close to, but not touching the valve
stem top. If the coil is energized, a gentle tugging
or vibration will be detected. An oil stream will
also be present on the oil level site port whenever
the pump is in operation. If an oil stream or splash
is not present, check the solenoid valve for
proper operation.
9
The oil level should be checked after the pump
has been operating at an inlet pressure below 1
torr for 5 minutes. Proper oil fill is confirmed
when the site port oil level is at least ½ level.
During initial evacuation, the site port oil level
may rise but will fall as the pump operates below
1 torr.
During operation, oil should always be visible in
the site port. If it is not, stop the pump and add
oil to the reservoir until it is visible around two-
thirds up the oil site port. An exact fill level is not
required as long as oil is always at least ½ level in
the site port, throughout all operating conditions.
An oil fill level above the site port should be
avoided as it will be difficult to verify correct fill
level and could damage the pump.
10
Check the voltage and motor current. They
should be within the specifications for the motor.
Note:
This test should also be performed under
normal system operating conditions.
DANGER: HIGH VOLTAGE!
Lethal shock hazard present.
USE EXTREME CAUTION!
