Bell-gossett P5002169C Series VSCS User Manual download pdf (Page 19)

OPERATION

FLUSHING

New and old systems should be flushed to

eliminate all foreign matter. Heavy scale, welding

splatter and wire or other large foreign matter can

clog the pump impeller. This will reduce the

capacity of the pump causing cavitation, excessive

vibration, and/or damage to close clearance parts

(wear rings, seals, sleeves, etc.).

FILLING

Vents should be located at the highest point so

entrained gases and air can escape. However, if

the gases are flammable, toxic, or corrosive they

should be vented to an appropriate place to

prevent harm to personnel or other parts of the

system. Pipe hangers and anchors should be

checked to make sure they are properly set to take

the additional weight of the pumpage.

All drains should be closed when filling the

system. Filling should be done slowly so that

excessive velocities do not cause rotation of the

pumping elements that may cause damage to the

pump or its driver. The adequacy of the anchors

and hangers may be checked by mounting a dial

indicator off of any rigid structure not tied to the

piping and setting the indicator button on the pump

flange in the axial direction of the nozzle. If the

indicator moves, as the filling proceeds, the

anchors and supports are not adequate or set

properly and should be corrected.

PRIMING

If the pump is installed with a positive head on the

suction, it can be primed by opening the suction

valve and loosening the vent plug on top of the

casing (do not remove), allowing air to be purged

from the casing.

If the pump is installed with a suction lift, priming

must be done by other methods such as foot

valves, ejectors, or by manually filling the casing

and suction line.

CAUTION: Seal Damage Hazard

Do not run pump dry. Seal damage may occur.

Failure to follow these instructions could result in

serious property damage and/or moderate

personal injury.

While venting the air from the pump body, the

pump shaft should be rotated a few times by hand.

PRE-START CHECKS

WARNING: Unexpected Startup Hazard

Disconnect and lockout power before servicing.

Failure to follow these instructions could result in

serious personal injury or death, or property

damage.

WARNING: Electrical Shock Hazard

Electrical connections to be made by a qualified

electrician in accordance with all applicable codes,

ordinances, and good practices.

Failure to follow these instructions could result in

serious personal injury or death, or property

damage.

Before the initial start of the pump, make the

following inspections:

1. Check the alignment between the pump and

motor. (See the Coupling Alignment section

for alignment requirements.)

2. Check all connections to the motor and

starting device with the wiring diagram. Check

voltage, phase, and frequency on the motor

nameplate with the line circuit.

3. Check the suction and discharge piping and

the pressure gauges for proper operation.

4. Turn the rotating element by hand to ensure

that it rotates freely.

5. Check the stuffing box adjustment, lubrication,

and piping (packing seal only).

6. Check the driver lubrication. Refer to the

driver installation, operation, and maintenance

manual.

7. Ensure that the pump bearings are properly

lubricated. See the Pump Bearings

paragraphs in the Lubrication section.

8. Ensure that the coupling is properly lubricated,

if required. See the Couplings paragraph in

the Lubrication section.

9. Ensure that the pump is full of liquid and that

all valves are properly set and operational,

with the discharge valve closed and the

suction valve fully open. Purge all air from the

top of the casing.

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Bell-gossett P5002169C Series VSCS User Manual Page 19

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