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PUMP OPERATION
Starting System:
1. Turn H-O-A switch to Off position and then turn on
main circuit breakers.
2. Open all discharge valves and allow water to rise in
wet well.
3. Turn H-O-A switch to Hand position on one pump
and notice operation. If pump is noisy and vibrates,
rotation is wrong. To change rotation, interchange
any two line leads to a three phase motor only. DO
NOT INTERCHANGE MAIN INCOMING LINES.
If duplex system, check second pump in the
same manner.
4. Now set H-O-A switch to Auto position and allow
water to rise in the wet well until the pump starts.
Allow pump to operate until the level drops to turn-
off point.
5. Allow wet well level to rise to start the other pump.
Notice run lights on the panel. Pumps should
alternate on each successive cycle of operation.
6. Turn both H-O-A switches to Off position and allow
wet well to fill to the override control level.
7. Turn both switches to Auto position and both
pumps should start and operate together until level
drops to turn-off point.
8. Repeat this operation cycle several times before
leaving job site.
9. Check voltage when pumps are operating and
check amp draw of each pump. Check amps on
each wire, as sometimes a high leg will exist. One
leg can be somewhat higher (5 to 10%) without
causing trouble. For excessive amp draw on one
leg, the power company should be consulted.
Phase Converters: Phase converters are generally
not recommended, but in cases where only single
phase current is available, phase converters can
be used. Be sure to size the phase converter large
enough for the amp draw specified on the motor
nameplate, not necessarily by motor horsepower. The
warranty of all three phase submersible motors is void
if operated with single phase power through a phase
converter and 3 leg ambient compensated extra-quick
trip overload protectors are not used.
PUMP MAINTENANCE
Lubrication or other maintenance is not required, as
the motors are oil filled.
Generally, these pumps give very reliable service, and
can be expected to operate for many years without
failure under normal operating conditions.
Lightning: In some areas where considerable
lightning occurs, we recommend that a lightning
arrestor be installed at the control panel. Lightning
arrestors are good insurance against damage to an
expensive motor.
Servicing Instructions:
IMPORTANT: Read all instructions prior to
replacing any parts.
WARNING: Before handling these pumps
and controls, always isolate and disconnect
power first.
Do not smoke or use any sparkable electrical
devices or flames in a septic (gaseous) or possible
septic environment.
Field Service on Motor: Any pump, in warranty, must
be returned to the factory for service or repaired at
an authorized Myers
not be allowed if in warranty pump is not taken to an
authorized Myers service center.
Replacing Seals and Bearings:
1. Drain all oil from motor chamber and seal chamber
as described.
2. Remove motor housing as described.
3. Remove bolts that hold seal chamber to pump
housing. Use back-off screws to break loose.
4. Lift rotating assembly (rotor, shaft, and impeller)
from pump case and place it horizontally on bench.
5. Remove impeller by holding the rotor and removing
the impeller retaining washer and bolt. The
impeller will be taper fitted to the shaft with a key.
The impeller may need to be jarred from the shaft
by tapping with a block of wood.
6. A shaft sleeve may be used in conjunction with the
lower seal and will need to be removed.
7. Remove lower seal spring and pry out the seal with
a screwdriver.
8. To remove the seal housing, take out socket head
bolts and using the bolts in the back-out holes,
pry plate loose. This will force out lower seal if not
already removed.
9. Remove snap ring that holds upper seal. Pull seal if
it is free. If not free, it can be forced off when shaft
is removed.
10. Remove bolts that hold bearing housing in place.
Set assembly in upright position and bump end
of shaft with hardwood block. This will push the
bearing from the housing and will force upper seal
from shaft.
11. Use a bearing puller to remove bearings. Replace
with new bearings. Press only on inner face of the
bearing when replacing. Pressing on the outer
face can damage the bearing.
IMPORTANT: DO NOT USE ANY OF THE OLD
SEAL PARTS. REPLACE WITH ALL NEW SEALS.
12. Thoroughly clean all castings before replacing
seals. Any dirt between the seal faces can
cause failure.
5
service center. Charges will
®
05625-556-1 11/18/13
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