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Lubricated Rotary Vane Laboratory Vacuum Systems
4A.4 Emergency Shutdown/Alarms
The following conditions may arise during
operation.
4A.4.1 Pump / System Shutdown
To shut down a pump, hold down the "PURGE/
OFF" button on the pump's 3.5" touchscreen until
the button turns green. The inlet electric actuator
isolation valve associated with that pump closes,
the inlet purge solenoid valve opens, and the
vacuum pump runs until its purge time (based
on control panel settings) is completed. The
purge cycle is necessary to purge the pump of
contaminants before shutdown.
For an emergency, the pump may be shut
down immediately without a purge cycle by
holding down the "OFF" button on the pump's
3.5" touchscreen until the button turns red. The
electric actuator isolation valve will close and the
purge solenoid valve will close.
NOTE:
If a pump is in the "AUTOMATIC" position
and the pump is NOT running when the
"PURGE/OFF" button is pressed, the pump
will NOT start or initiate a 15 minute purge
cycle.
4A.4.2 Unit Shutdown / Alarms
(See Figure 4A.2 Unit Screens)
CAUTION
If the panel is energized, then dangerous
voltages exist behind the panel door. If
possible, remove power to the panel before
opening. ONLY TRAINED AND QUALIFIED
PERSONS SHOULD OPEN THE ENCLOSURE
DOOR.
4107 9021 88.01
Motor Overload
This will shut down the pump in question and
will not re-start until the condition is corrected
and the reset button on the starter is reset
(See "Motor breakers trip constantly" in the
Troubleshooting Section 5.0). Press the alarm
silence button on the main display screen to
silence the alarm. The Shutdown indicator on
the main screen and the unit screen will remain
"Red" until motor starter is reset. After the
starter is reset, push the "Reset" button on the
Unit Shutdown screen. On the Unit main screen,
put the pump into "AUTOMATIC" mode to make
the pump available for operation.
CAUTION - Motor Overload Shutdown:
De-energize the faulted vacuum pump and
investigate the reason for fault prior to trying
to restart. Always check motors for shorts -
phase to phase and phase to ground prior
to resetting the overload and starting the
vacuum pump.
High
Discharge
Shutdown
This will shut down the vacuum pump in question
and not restart until the condition is corrected,
the "Reset" button pushed and the "AUTOMATIC"
button is pressed on the control panel. Before
allowing the unit to re-start, the condition
should be checked (see "Pump overheats" in
the Troubleshooting Section 5.0). Even after
resetting the alarm and putting the vacuum unit
in "AUTOMATIC" mode, the unit may not re-start,
depending on system sequencing and system
pressure.
High Discharge Exhaust Temperature Alarm
This will not shut down the pump in question
but instead is a warning that a shutdown is
likely to occur. The condition should be checked
immediately (see "Pump overheats" in the
Troubleshooting Section 5.0) to avoid a pump
shutdown.
4A-3
Exhaust
Temperature
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