Goulds Pumps 3408 - IOM - Manual (Page 25)

OPERATION
PRE-START CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PRIMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Fill ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
STARTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
OP ER A TIONAL CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . 24
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
FREEZE PRO TEC TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
FIELD TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3408 IOM 03/99
23
PRE-START CHECKS
Before the initial start of the pump, make the following
inspections:
1. Check alignment between pump and driver. See the
section on alignment for alignment requirements.
2. Check all connections to motor and starting device
with wiring diagram. Check voltage, phase, and
frequency on motor nameplate with line circuit.
3. Check suction and discharge piping and pressure
gauges for proper operation.
4. Turn rotating element by hand to assure that it rotates
freely.
5. Check stuffing box adjustment, lubrication, and
piping.
6. Check driver lubrication.
7. Assure that pump bearings are properly lubricated.
8. Assure that coupling is properly lubricated, if required.
9. Assure that pump is full of liquid and all valves are
properly set and operational, with the discharge valve
and the suction valve open. Purge all air from top of
casing.
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 the pump is operated
with incorrect rotation. Check rotation each time the
motor leads have been disconnected.
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 the 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
Under either condition, the pump must be
completely filled with liquid before starting. The
pump must not be run dry in the hope it will
prime itself. Serious damage to the pump may
result if it is started dry.
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.
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