8
B1d.1
4/06
Supercedes 8/05
PACOPACO
PACOPACO
PACO
PUMPS
• For overnight or temporary shutdown periods under
non-freezing conditions, the pump may remain filled
with liquid. Make sure the pump is fully primed be-
fore restarting.
• For short or frequent shutdown periods under freez-
ing conditions, keep fluid moving within the pump
casing and insulate or heat the pump exterior to pre
vent freezing.
G. EXTENDED PERIOD SHUTDOWN
• For long shutdowns or to isolate the pump for main-
tenance, close the suction and discharge valves. If
no suction valve is used and the pump has positive
suction head, drain all liquid from the suction line to
terminate liquid flow into the pump suction nozzle. If
applicable, turn off any external source of cooling or
lubricating fluid to the shaft seals. Remove plugs in
pump drain and vent taps, as required, and drain all
liquid from the pump casing. Remove packing, if ap-
plicable.
• If freezing conditions will exist during long shut down
periods, after draining the pump, blow out all liquid
in passages and pockets with compressed air.
Freezing of pump liquid can also be prevented by
filling the pump with antifreeze solution.
• Rotate the shaft by hand monthly to coat bearings
with lubricant and retard oxidation and corrosion.
• Where applicable follow motor manufacturer’s
storage recommendations.
IV. MAINTENANCE
A. MOTOR LUBRICATION
WARNING: Do not attempt any maintenance,
inspection, repair or cleaning in the vicinity of
rotating equipment. Such action could result in
personal injury to operating personnel.
Before attempting any inspection or repair on the
pump, the driver controls must be in the "OFF"
position, locked and tagged to prevent injury to
personnel performing service on the pump.
• Always follow motor manufacturer’s lubrication
instructions if available, and periodically check grease
fittings and drain plugs for leaks.
• If lubricating instructions do not accompany motor,
refer to (Table 6a) for recommended lubrication peri-
ods.
two wires at the motor starter terminals T1 and T2.
• For Wye-Delta motors rotation has to be verified for
both wye and delta connections.
D. STARTING THE PUMP
WARNING: The pump must not be operated without
an approved coupling guard in place. Failure to ob-
serve this warning could result in injury to operating
personnel.
• Install coupling guard on flexible coupled units.
• Fully open valve (if any) in suction line, and close
valve in discharge line.
• If applicable, turn on any external source of cooling
or lubricating fluid to the shaft seals.
• Start the motor (pump).
• Immediately after the pump reaches full operating
speed, slowly crack open the discharge valve, and
open bleed valves at system high points. Do not
open discharge valve completely until system is full
of liquid, purged of air and checked for leaks.
• After entirely filling the system, fully open discharge
valve and close system bleed valves.
• If the pump is fitted with pressure gauges, open
gauge cocks and record pressure reading for future
reference. Verify that the pump is performing in ac-
cordance with the parameters specified on the per-
formance curve.
• Check and record voltage, amperage per phase,
and kilowatts, if a watt meter is available.
E. PUMP SHUTDOWN
• The following shutdown procedures will apply in most
normal shutdowns for the PACO Type KP Double
Suction Centrifugal Split Case Pump. If the pump
will be inoperative for an extended length of time,
follow storage procedures in Extended Period Shut-
down.
• Always close the discharge valve before stopping the
pump. Close the valve slowly to prevent hydraulic
shock.
• Cut and lock off power to the motor.
F. SHORT DURATION SHUTDOWN
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