ROUTINE STARTUP PROCEDURE
1. Check sealant level and add sealant as necessary to bring to proper level.
2. Open inlet isolation valve to vacuum receiver tank or process.
3. Turn on main power by turning fusible disconnect switch to “ON”.
4. Turn H-O-A selector switch to A (Auto) if used with vacuum receiver tank or to H (Hand) if not.
NOTE:
Remember when in A (Auto) mode the vacuum switches will be in the circuit and control the starting
and stopping of the pump. A maximum of 5 starts per hour per motor is allowed to prevent possible
damage to the motor. Minimum run timers are wired into the control center as standard equipment to
insure the number of starts are not exceeded.
5. Push start button for each pump. On simplex systems the pump will start and evacuate the receiver to the high
setting on the vacuum switch, whereupon it will shut down. When the vacuum drops to the low setting, the
pump will start to return it to the high setting again.
6. On duplex systems, both pumps will start and evacuate the receiver to the high setting on vacuum switch #1
whereupon both will shut down. When the vacuum drops to the low setting on switch #1, one pump will
alternately start to return the vacuum to the higher level. If one pump cannot handle the load and the vacuum
level continues to drop to the low setting on switch #2, both pumps will operate and continue to do so until
the vacuum is returned to the high setting on switch #1.
7. Cooling water solenoid valve will automatically open to allow flow to the heat exchanger.
SHUTDOWN PROCEDURE
1. Close inlet isolation valve.
2. Turn H-O-A selector switch to “OFF”.
3. Turn off main power.
TYPICAL DRSP/OFRP SYSTEM DIAGRAM
This representation is typical of systems supplied by Tuthill Vacuum & Blower Systems, and id for reference only. Due to
the wide variety of available custom options, your actual system may differ slightly in configuration. Consult the specific
engineering drawings for your system for an exact representation.
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