© Copyright 2014 Zoeller Co. All rights reserved.
© Copyright 2010. All rights reserved.
6
OPERATION
Unit must be full of water before operating. Do
not run dry, or against a closed discharge. Do not pump dirty water
or abrasive liquids. To do so will cause pump failure and will void the
warranty.
VALVES
The inlet and outlet isolation valve should be in the full open position.
PRIMING
NOTE:
Before starting the pump it is absolutely necessary that both the
pump and the inlet pipe be completely filled with water.
PRESSURE BOOST INSTALLATIONS
Priming is automatic when pump is connected to a pressure source such
as a hydrant or city main (See Figure 4).
1. Open the valves or nozzles on inlet and discharge side of pump.
2. To relieve trapped air, allow water supply to run a minimum of 30
seconds before starting the pump.
IMPORTANT:
An adequate flow of water (1.5 GPM min.) going into the
pump is required so that the pump impellers and shaft seal do not run
dry and fail.
3. If you installed a pressure gauge at the pump inlet, a reading of 2 PSI
minimum should show whenever the pump is in operation. This read-
ing insures that there is an ample supply of water into the pump inlet
housing.
4. The controller, flow sensor and pressure switch continuously monitor
water pressure and flow. The system automatically turns the unit off
if pressure reaches 70 to 72 PSI. The control package also protects
the unit from dry run by shutting down in 30 seconds if water usage
drops below 1 gallon per minute.
START - UP PROCEDURE
1. Open a faucet nearest to the pump. When the flow reaches one gal-
lon per minute or more, the unit will automatically turn on. When the
flow is stopped or falls below one gallon per minute, the pump will run
for 30 seconds and automatically turn off.
2. While the pump is running, check for leaks, excessive vibration or
unusual noises.
Figure 7 - Correct Motor/Pump Rotation (all units)
MAINTENANCE
ROTARY SEAL ASSEMBLY REPLACEMENT (See Figure 11)
1. Disengage pump body from motor mounting ring.
2. Remove diffuser.
3. Remove impeller 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 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 (See Figure 8).
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 (Figures
9 & 10).
NOTE:
To help facilitate installation, apply a light coating of soap and
water 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 light coating of soap and water 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
1. Uni-Frame motors can be replaced in the field with any standard Nema J
jet pump motor by following the instructions.
Before attempting to replace the motor, make
certain that the power supply is disconnected and the system pressure
is relieved.
2. Remove pump body diffuser, impeller and shaft seal (Figure 11) 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 (Figure 11) 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 positioning
motor against the mounting frame and assembling with four (4) 3/8" x
3/4" cap screws. The mounting base is connected at the bottom of the
mounting frame with two (2) of the four (4) 3/8" x 3/4" cap screws.
5. Follow steps 5, 6, 7 and 8 of Rotor Seal Assembly to reassemble the
remainder of the pump. Because damage to the shaft seal is most
likely to occur in disassembly, a new seal will be necessary.
IL0513
IMPORTANT:
An adequate flow of water (1.5 GPM minimum) going
into the pump is required so that the pump impellers and shaft seal
do not run dry and fail.