Eng
lish
(US)
10
6.5 Voltage regulation
The motor will operate satisfactorily under the following
conditions for voltage and frequency variation, but not necessarily
in accordance with the standards established for operation under
rated conditions:
• The voltage variation may not exceed 10 % above or below
rating specified on the motor data plate.
• The frequency variation may not exceed 5 % above or below
motor rating.
• The sum of the voltage and frequency variations may not
exceed 10 % above or below motor rating, provided the
frequency variation does not exceed 5 %.
6.6 Pump shutdown
The following shutdown procedures will apply in most normal
shutdowns for the PACO Type L pumps. If the pump will be
inoperative for an extended length of time, follow storage
procedures in Extended Period Shutdown.
• 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.
6.7 Short duration shutdown
• For overnight or temporary shutdown periods under non-
freezing conditions, the pump may remain filled with liquid.
Make sure the pump is fully primed before restarting.
• For short or frequent shutdown periods under freezing
conditions, keep fluid moving within the pump casing and
insulate or heat the pump exterior to pre vent freezing.
6.8 Extended period shutdown
• For long shutdown periods, or to isolate the pump for
maintenance, close suction gate valve. If no suction valve is
used and the pump has positive suction head, drain all liquid
from suction line to terminate liquid flow into pump suction
nozzle. Remove plugs in pump drain and vent taps, as
required, and drain all liquid from the pump volute casing.
• If freezing conditions will exist during long shutdown periods,
completely drain the pump and blow out all liquid passages
and pockets with compressed air. Freezing of pump liquid can
also be prevented by filling the pump with antifreeze solution.
7. Maintenance
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.
7.1 Motor lubrication
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 for recommended lubrication periods.
• To lubricate the motor while running or at rest, remove grease
drain plug (if any) and filler plug on grease fitting. Grease with
clean lubricant until grease appears at drain hole or along
motor shaft.
• One-half to one cubic inch of grease is sufficient for motors 5
HP and under, with proportionately more grease for greater
HP motors.
• Most fractional and some integral frame motors have "sealed-
for-life" bearings, and do not require further lubrication
throughout motor life.
• Always follow motor manufacturer's lubrication instructions,
and periodically check grease fittings and drain plugs for
leaks.
• If lubricating instructions do not accompany motor, refer to
Table , “Recommended Lubrication Periods,” on page 10 for
recommended lubrication periods.
• Table , “Approved lubricants,” on page 11 lists recommended
types of grease for both pump and motor lubrication. These
types have all been thoroughly tested and should be used
whenever possible.
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.
Recommended Lubrication Periods
Motor RPM
Motor HP
Operating conditions
Standard
Severe
Extreme
1750 and
below
0.33 - 7.50p
3 yrs
1 yr
6 mo
10-40
1-3 yrs
6 mo - 1 yr
3 mo
50-150
1 yr
6 mo
3 mo
200 and up
1 yr
6 mo
3 mo
above 1750
all hp
6 mo
3 mo
3 mo
Standard conditions:
8 Hours per day operation, normal or light loading, clean air,
100 °F, maximum ambient temperature.
Severe conditions:
Continuous 24-hour operation, shock loading or vibration, poor
ventilation, 100-150 °F, ambient temperature.
Extreme conditions:
Continuous operation, heavy shock or vibration, dirt or dust in
air, extreme ambient temperature.
PA
CO Pumps
13
