3
WARNING:
DO NOT RUN THE PUMP BEFORE PRIMING IT, SINCE THE SEAL AND IMPELLER COULD BE
PERMANENTLY
DAMAGED.
WARNING - ELECTRICAL PRECAUTIONS
All wiring, electrical connections, and system grounding
must comply with the National Electrical Code (NEC) and
with any local codes and ordinances. Employ a licensed
electrician.
WARNING - RISK OF ELECTRICAL SHOCK
Before servicing motor operated equipment, shut off the power
at the main electrical panel and disconnect the power supply from
the motor and the accessories. Use safe working practices during
servicing of equipment.
a)
Lubrication:
The pump requires none. Refer to motor manufactur-
ers instructions for motor lubrication.
b)
Cleanout plug:
For applications where clogging is a problem,
a 1/4" NPT plug has been provided for access to clean the noz-
zle/venturi. This plug is located directly below the suction opening
in the front of the casing.
IMPORTANT! Before removing the
cleanout plug, shut off the power to the pump at the main elec-
trical panel. Open a tap in the water system to release the
pressure.
c)
Replacing Mechanical Seal: (See Fig. 2)
Disassembly
1)
Shut off the power to the pump at the main sevice panel.
2)
Open a tap in the water system to release the pressure.
3)
Remove the drain (12) and prime plugs to allow the pump to
drain.
4)
Remove the 4 bolts (1) and remove casing (2).
5)
Pry the diffuser (4) out of the casing using 2 slotted screwdrivers
for leverage.
Fig.2
6)
Remove cap (5) and insert a screwdriver to prevent the shaft
from turning while unscrewing the impeller (6)(GE m o t o r s ) .
For A.O. Smith motors, remove rear cover and hold the shaft
using a fl at wrench inserted from the side, through the opening
in the end of the housing. If the impeller cannot be turned by
hand, insert a fl at object into the impeller vane.
7)
Slip the rotating seal (7) off the shaft and remove the seal plate
(8).
8)
Remove the ceramic seal seat (9) from the seal plate.
Reassembly
1) Clean all the parts thoroughly before assembling.
2)
Push ceramic seal (9) it into the seal plate using thumbs only.
Make sure the smooth surface of the ceramic seat faces out-
wards.
3)
Put the seal plate back on the motor.
4) Slip on rotating seal (7) to the shaft with the 'carbon' ring to-
wards the ceramic seat.
5) Replace the impeller (6) and the diffuser (4).
6)
Replace the casing (2) making sure that the venturi is properly
seated, and that the gasket is not damaged and is in place.
7)
Reinstall the drain plugs.
8)
Reconnect the power.
9)
Prime pump, start, check for leaks.
a)
Priming:
Do not run the pump before priming it, since the seal and
impeller could be permanently damaged. Remove the plug from
the street tee and pour clean water into the unit until casing and
suction line are completely fi lled. Replace the priming plug and
start the motor. If the unit is properly primed, it should pump almost
immediately. If not, repeat the priming procedure until all the air has
been eliminated from the suction line. If an in-line check valve is
used in place of a foot valve, the initial priming time may take 5 to
15 minutes depending on the suction lift, (higher suction lift requires
longer priming times). At 10 feet or greater suction lifts, water should
be added to the casing approximately every 3 minutes until primed.
If the pump does not prime within 25 minutes, stop the pump and
check for suction leaks.
b)
Draining:
Should the unit be subject to freezing, it will be necessary to
drain the pump and tank. To do this, shut off the power to the pump at
the main electrical service panel. Open a valve in the system to release
the pressure. Remove drain and priming plugs from the casing. Allow
ample time for system to drain before reinstalling the plugs!
OPERATION - PRIMING THE PUMP
MAINTENANCE
