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PAGE 8 OPERATION
Because variations exist in both the equipment used with these pumps and in the particular installation of the
pump and driver, specific operating instructions are not within the scope of this manual. However, there are
general rules and practices that apply to all pump installations and operation.
CAUTION: BEFORE STARTING OR OPERATING THE PUMP, READ THIS ENTIRE MANUAL,
ESPECIALLY THE FOLLOWING INSTRUCTIONS:
A. BEFORE STARTING THE PUMP, INSTALL CLOSED GUARDS AROUND THE COUPLING.
B. BEFORE STARTING THE PUMP, ROTATE THE UNIT OR ASSEMBLY BY HAND TO ASSURE ALL
MOVING PARTS ARE FREE.
C. OBSERVE ALL CAUTION AND DANGER TAGS ATTACHED TO THE EQUIPMENT.
D. NEVER RUN THE PUMP DRY AS THE CLOSE RUNNING FITS WITHIN THE PUMP ARE WATER
LUBRICATED. RUNNING DRY MAY RESULT IN PUMP SEIZURE.
E. BEFORE STARTING THE PUMP, FILL THE CASING AND SUCTION LINE WITH LIQUID. THE
PUMP MAY BE PRIMED USING AN EJECTOR OR VACUUM PUMP.
F. BEFORE STARTING A PACKED BOX PUMP, ADJUST THE PACKING GLAND SO THERE IS
SUFFICIENT LEAKAGE TO LUBRICATE THE PACKING AND ASSURE A COOL PACKING BOX.
(SEE MAINTENANCE INSTRUCTIONS).
G. IF EXCESSIVE VIBRATION OR NOISE OCCURS DURING OPERATION, SHUT THE PUMP DOWN
AND CONSULT AN AURORA PUMP REPRESENTATIVE.
1. OPERATING AT REDUCED CAPACITY
Although these pumps are applicable over a wide range of operating conditions, care should be exercised when
doing so, especially when the actual conditions differ from the sold-for conditions. You should always contact
your nearest Aurora Pump distributor before operating the pumps for any condition other than that for which it
was sold.
2. PRIMING
Since the pump medium is used to lubricate various internal parts, running a centrifugal pump dry can result in
extensive damage and possible seizing. It is therefore imperative that the pump be primed prior to initial start-
up and that prime be maintained through subsequent start-stop cycles.
The priming method is different for positive and negative suction head systems, and the following procedures
should be followed.
A. Positive Suction Head –
1. Open the vent on the highest point on the pump casing.
2. Open all suction valves.
3. Allow the pumped liquid to flow from the vent hole until all air bubbles are vented, then close the
vent.
4. The pump is now primed.
B. Negative Suction Head – (not applicable for fire pump applications)
1. Install an ejector or vacuum pump on the vent at the highest point on the pump casing.
2. Close the discharge valve.
3. Open the suction valve.
4. Start ejector or vacuum pump.
5. Allow the liquid to flow until a continuous flow is exhausted from the ejector, then close the valve to
the vent.
6. The pump is now primed.