Bell & Gossett P5002169C Series VSCS - Manual (Page 20)

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10. Check rotation. Be sure that the driver
operates in the direction indicated by the
arrow on the pump casing as serious damage
can result if pump is operated with incorrect
rotation. Check rotation each time the motor
leads have been disconnected.
WARNING: Rotating Components
Hazard
Do not operate pump without all guards in place.
Failure to follow these instructions could result in
serious injury or death, or property damage.
STARTING
1. Close drain valves and valve in discharge line.
2. Open fully all valves in the suction line.
3. Slowly turn on flush water to the stuffing box.
(If pumped fluid is dirty or if leakage of air is to
be prevented, these lines should be always
left open.)
4. Prime the pump.
5. Start the pump driver (turbines and engines
may require warming up; consult the
manufacturer’s instructions).
NOTE: If the pump loses prime during start-up, it
should be shut down and the condition corrected
before the procedure is repeated.
6. When the pump is operating at full speed,
open the discharge valve slowly. This should
be done promptly after start-up to prevent
damage to pump by operating at zero flow.
7. Adjust the flush line valves to produce the
recommended pressure for the stuffing box.
OPTIONAL CHECKLIST
1. Driver/Pump Rotation: Check rotation each
time the motor leads have been disconnected.
Be sure that the driver operates in the
direction indicated by the arrow on the pump
casing. Rough operation and extreme
vibration can result if the pump is operated in
the wrong direction.
2. Flow: An accurate measurement of flow rate
(volume/time) is difficult in the field. Venturi
meters, flow nozzles, orifice plates, or timing
the draw down in the wet well are all possible
methods. Record any reading for future
reference.
3. Pressure: Check and record both suction and
discharge pressure gauge readings for future
reference. Also record voltage, amperage per
phase, kilowatts if an indicating wattmeter is
available, and pump speed.
4. Temperature: Check and record bearing
temperatures using a thermometer.
Temperature should not exceed 250°F.
5. Vibration: The acceptable vibration level of a
centrifugal pump depends on the rigidity of the
pump and the supporting structure. Refer to
the Hydraulic Institute Standards for a
complete description and charts on various
pumps.
6. Sound: Field sound levels are difficult to
measure because of background noise from
piping, valves, drivers, gears, etc. Follow
recommendations in the Hydraulic Institute
Standards.
7. Make all pump output adjustments with the
discharge valves.
CAUTION: Cavitation Damage Hazard
Do not throttle the suction valve to adjust the
pump output.
Failure to follow these instructions could result in
property damage and/or moderate personal injury.
FREEZE PROTECTION
Pumps that are shut down during freezing
conditions should be protected by draining the
pump and removing all liquid from the casing.
FIELD TESTS
A typical performance curve for a specific pump
can be obtained from your local Bell & Gossett
representative. This can be used in conjunction
with a field test, if one is required. All Bell &
Gossett tests and curves are based on the
Hydraulic Institute Standards. Any field test must
be conducted according to these Standards.
Unless otherwise specifically agreed, all capacity,
head, and efficiencies are based on shop tests
when handling clear, cold, fresh water at a
temperature not over 85°F.