Instruction 2111.80B 04/05 12
D. SEQUENCE FOR INITIAL START-UP
1. Be sure that the discharge valve is closed, suction valve is completely open, and pump is completely
primed. Vent pump by opening vent taps in the casing, suction pipe, and stuffing box or mechanical seal.
2. Close the suction vent line and seal / stuffing box vent fitting.
3. Start the pump in accordance with the particular control system being used.
4. Close pump casing discharge vent when all entrapped air is expelled.
5. Slowly open discharge valve until valve is completely opened. This should coincide with stable pump
operation at the designed duty. Because Total Dynamic Head (TDH) is a function of several variables and
cannot be accurately determined from a single gauge reading, refer to your CHICAGO PUMP
representative for suspected discrepancies in actual pump performance. Actual operating head should not
be less than the minimum operating head nor greater than the maximum limit shown on the pump perfor-
mance curve.
During the initial period of operation, check the following items:
a. See that the pump bearings do not overheat due to over or under lubrication. Bearings normally operate
at approximately 50° C (122°F).
b. See that there is the desired water weepage from the stuffing box or that lubrication to the mechanical
seal is being provided.
c. See that all pipe connections are tight, and that valves are functioning properly.
d. Observe the flexible line shafting, checking for vibration or whipping.
e. Note operation of the automatic control mechanism, observing numerous complete start-stop
cycles. See that the liquid level control starts and stops properly as wet basin fills and is then emptied by
the pump. Check high and low water level adjustment.
Observe operation of pump closely for the first day and at frequent regular intervals for the first two
weeks. A new machine is frequently stiff or initial control regulation may be incorrect, therefore the
unit should be watched closely to note performance. Refer to PREVENTATIVE
MAINTENANCE SCHEDULE, page 20, for normal operating inspection procedures and
frequencies
E. NORMAL OPERATION
The pump must be operated within 10% of capacity rating of the specified primary (nameplate) duty point. The
pump should be checked and maintained in accordance with the PREVENTATIVE MAINTENANCE
SCHEDULE, page 20. Additionally, the dry pit area should be cleaned regularly. Amperage readings
should be checked to warn of improper phase reversal or a phase out condition. Controls and drivers should be
checked in accordance with specific manufacturer's recommendations. On multiple pump systems, Elapsed
Time Meters should indicate balanced operation between pumps. The pump should operate without excessive
noise or vibration. Pump and motor bearings should not overheat. Weepage from the stuffing / seal box should be
controlled per guidelines on page 10 and 11.
F. EMERGENCY OPERATION
In the event of station power failure: Do not allow automatic restart of the pump. Perform SEQUENCE FOR
INITIAL START -UP as outlined on this page.
In the event of station flooding; If pump or motor become submerged, units MUST be removed and completely
rebuilt by a competent service shop. Refer to Repair Instructions.
In the event of mechanical failures: The unit should be locked out and repair service obtained from a competent
service shop. Refer to Repair Instructions.
G. STOPPING PROCEDURE
Turn off power to the pump and allow the pump to coast to a complete stop before restarting. No banging or
hammering sounds should be heard during shut-down. If this condition exists, "water hammer" may be
occurring in the piping. This system problem may result in severe damage to the pump. It is recommended that
a specialized engineer in this field be consulted immediately. The pump must not be operated until this
condition is eliminated. Consult your CHICAGO PUMP representative or the factory.
H. EXTENDED SHUT-DOWN PROCEDURE
When shutting down the pump for an extended period, the motor disconnect switch should be opened and
locked out. All valves on suction, discharge, and packing lubrication lines must be shut tight. The pump should
be completely drained of water by removing vent and drain plugs until all pumpage has run out. When
practical, the pump should be flushed to remove any corrosives and/or abrasives. Draining and flushing
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