5
© Copyright 2015 Zoeller
®
Co. All rights reserved.
PUMP INSTALLATION (continued)
CHART 2
Motor HP
Volts
Phase
Distance in Feet from Motor to Service Panel
Breaker
Size
(Amps)
0-50 Ft.
50-100 Ft.
100-150 Ft.
150-200 Ft.
200-300 Ft.
Wire Size
1/2
3/4
115/230
115/230
1
1
14/14
12/14
14/14
12/14
14/14
12/14
12/14
12/14
12/14
10/14
15/15
20/15
ROTARY SEAL ASSEMBLY REPLACEMENT (Figure 5)
CAUTION
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.
1. Disengage pump body (Ref. No. 8) from motor mounting ring (Ref.
No. 2).
2. Remove diffuser (Ref. No. 7).
3. Remove impeller (Ref. No. 6) by unthreading counter clockwise
while looking into the eye of the impeller. To hold motor shaft, use
the screwdriver slot at the impeller eye.
4. The rotary seal (Ref. No. 4) will come loose at this time. Use a
screwdriver (or similar instrument) to pry the ceramic seal and
rubber gasket from the recess of the mounting bracket.
CAUTION
Be careful not to damage the motor shaft
or recess surface.
5. Clean the recess and motor shaft thoroughly.
6. Install the new rotary seal assembly.
a. Insert the ceramic seal and the rubber gasket into the recess.
NOTE:
To help facilitate installation, apply a drop of liquid soap to
the outside diameter of the rubber gasket. Make certain that the
ceramic seal is kept clean and free of dirt and/or oil.
b. Slip the remaining parts of the rotary seal assembly onto the
motor shaft.
NOTE:
Apply a drop of liquid soap to the inside diameter of the
rubber drive ring.
7. Replace the impeller and diffuser removed in Steps 2 & 3.
8. Reassemble the pump body to the motor and mounting bracket.
MOTOR REPLACEMENT (Figure 5)
1. Uni-Frame motors can be replaced in the field with any standard
Nema J jet pump motor by following the following instructions.
CAUTION
Before attempting to replace the motor,
make certain that the power supply is disconnected and the
system pressure is relieved.
2. Remove pump body (Ref. No. 8) diffuser (Ref. No. 7), impeller
(Ref. No. 6) and shaft seal (Ref. No. 4) by following steps 1, 2, 3 &
4 of Rotary Seal Replacement.
3. Uni-Frame motors (indicated by 56U in the frame “FR” block on
the motor decal) can be removed as follows:
a. Disassemble pump base (Ref. No. 3) from unit by removing
two (2) 3/8” hex nuts.
b. Remove four (4) thru bolts from rear of motor and pull away
shell and stator assembly (discard).
c. Disconnect four (4) self tapping screws that hold the bearing
housing to the mounting ring. Discard bearing housing, rotor
assembly and (2) square headed screws.
4. Replace motor with standard Nema J jet pump motor by
MOTOR
POWER
SUPPLY
L1
L2
Figure 6
PRIMING
CAUTION
Before starting motor, the pump body
must be completely filled with water. Running the pump dry will
cause seal damage.
1. Remove priming plug from the priming opening. Pour in water
continuously until all air has been expelled from pump and suc-
tion line. If tee has been provided at the well head the suction
pipe in the well can be filled at this point.
2. Replace plug, screwing in only far enough to seal, and start the
motor. If pump fails to build up pressure within three (3) minutes,
shut off pump and prime again. Once the pump is primed, tighten
priming plug completely.
IL0304
Figure 7
MAINTENANCE
1. Lubrication - The pumps and motors require no lubrication. The
ball bearings of the motor have been greased at the factory and
under normal operating conditions should require no further
greasing.
2. 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.
