© Copyright 2014 Zoeller
®
Co. All rights reserved.
7
Under normal operating conditions they should require no
further greasing.
Freezing
Drain the entire system if there is danger of freezing. A
drain plug is provided at the bottom of the pump case for
this purpose.
ROTARY SEAL ASSEMBLY REPLACEMENT
Make certain that the power supply is
disconnected before attempting to service
the unit! The rotary seal assembly must be handled carefully to
avoid damaging the precision lapped faces of the sealing components.
Disassembly
1. Remove the four (4) pump through bolts that connect
the mounting ring to the pump body. Remove the
pump body, taking care not to damage the gasket or
o-ring.
2. Remove the impeller. Using a 9/16” open end wrench,
hold the motor shaft flat and unthread the impeller by
turning it counterclockwise. The motor shaft flat area is
located in the middle of the mounting ring.
3. Remove the mechanical seal assembly. The rotary
portion of the seal assembly (carbon ring, Buna-N
gasket and spring) will easily slide off the end of the
shaft. The ceramic portion can be pried out of the
rubber seating using two (2) screwdrivers (see Fig. 6).
IL0173
IL0168
Figure 6 - Remove
Mechanical Seal
Figure 7 - Press in Seal
Reassembly
CAUTION
The precision lapped faces of the
mechanical seal are easily damaged. Handle the
replacement seal carefully. Short seal life will result if seal
faces (ceramic & carbon) are nicked, scratched or dirty.
1. Clean the seal cavity of the mounting ring and the
motor shaft thoroughly.
2. Apply liquid soap (one
drop only) to the outside
of the Buna-N gasket
that houses the ceramic
seal seat. With thumb
pressure, press the
ceramic seat, polished
face up, squarely into the
seal cavity (see Figure 7).
3. If seal does not seat
squarely, remove and
reclean the seal cavity.
Never examine, make wiring changes or
touch the motor before disconnecting
the main electrical supply switch. The thermal device may have
opened the electrical circuit.
PRIMING
1. Before starting any centrifugal pump, it is absolutely
necessary that both the casing and suction pipe be
completely filled with liquid. This priming can be
accomplished by any of the following methods:
2. When the liquid supply level is above the center line
of the pump, it is primed by opening the suction and
discharge valves. The inflowing liquid will displace the
air and fill the suction line, pump casing, and discharge
line up to the level of supply.
3. Where the pump is operating with suction lift and the
suction line is equipped with a foot valve, remove the
priming plug from the discharge tee (see Figure 4)
and fill the pump body and suction pipe completely
with water. No additional water will be needed for
subsequent start-ups unless the pump body is drained.
4. After the pump is turned on it will require 2-5 minutes
before all air is evacuated from the suction line and
water begins to flow. If there is no water after 5
minutes, turn the pump off and check the following:
Any air leaks on the suction line must be eliminated.
Suction pipe inlet should be a minimum of 5 feet below
the water level.
Total suction lift cannot be greater than 25 feet.
Any restrictions in the discharge pipe, such as a closed
valve must be eliminated.
NOTE: Unit must be full of liquid before operating. Never
run dry, or against a closed discharge. Dry running or
running unit against a closed discharge will cause damage
to the shaft seal. Do not pump dirty water or abrasive
liquids, otherwise the same may occur as if running dry.
MOTOR ROTATION
1. Pump impeller rotates in one direction only,
(counterclockwise when facing the pump suction
tapping) and cannot be reversed.
MAINTENANCE
Lubrication
The pump and motor require no lubrication. The ball
bearings of the motor have been greased at the factory.
IL0169
Figure 8 - If Necessary, Press with
Cardboard and Pipe
3/4” Pipe
- Press
Carefully
NOTE:
Cardboard
Washer Protects
Seal Face
Seal
Seal
Cavity
(*) Not economical to run in 115 volt, use 230 volts
MINIMUM COPPER WIRE SIZE CHART (GAUGE)
Chart D
DISTANCE
FROM MOTOR
TO FUSE BOX
METER, OR
ELECTRICAL
OUTLET
SINGLE PHASE MOTORS
1/3HP
115V 230V
1/2HP
115V 230V
3/4
115V 230V
1HP
115V 230V
1-1/2HP
115V 230V
2HP
115V 230V
0-50’
50-100’
100-150’
150-200’
200-300’
Breaker Size
(Amps)
14 14
14 14
14 14
12 14
12 14
15 15
12 14
12 14
12 14
12 14
10 14
20 15
12 14
12 14
10 14
10 12
8 12
20 15
10 14
10 14
10 12
8 12
6 10
30 15
10 12
8 12
6 12
* 10
* 10
30 20
10 12
8 12
6 12
* 10
* 10
30 20
