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Electrical Connections:
Make all connections from motor
to control panel to com ply with
local codes.
NOTE: Hydromatic
built
®
control panels supply the correct
circuitry for moisture and heat
sensor connections. Failure
to install the correct circuitry
with proper connection would
negate warranty and factory
mutual approval.
CAUTION: Make sure that
the ground wire is securely
connected and that the unit is
properly grounded in accordance
with local codes.
Mixer Operations
Starting the Mixer:
WARNING: Severe injury may
result from accidental contact
with moving propeller. Keep
clothing, hands and feet away
from propeller any time power is
connected to the unit.
To start the mixer, perform the
following steps in order:
If mixer is three phase, the
rotation of the propeller must
first be checked. Lift mixer from
sump, lay it down, and quickly
turn on and then off.
The propeller should turn
counterclockwise when viewed
from the suction. If rotation is
wrong, turn off main breaker and
interchange any two line leads to
motor to correct rotation. If mixer
is single phase, no rotation check
is necessary.
After installing mixer in basin in
desired location, run water into
basin until mixer is covered.
Turn mixer on and observe
mixing action at the surface of
the water. If required, adjust
position of mixer mounting
brackets until desired mixing
action is achieved in the basin.
If problems occur check the
power source. Make sure a
separate supply line is available.
Verify the voltage supply.
Mixer
Maintenance
Disassembly, Inspection,
Reassembly:
For Hazardous Location Service:
These pumps are to be used for
handling sewage, wastewater
and storm water only. Do not
use in other hazardous locations.
These motors must be repaired
and serviced only at Hydromatic
authorized service centers or at
the factory. Any unauthorized
field repair voids the warranty
and the hazardous location rating.
Turn off circuit break er.
Remove mixer from sump.
Replacing Seals:
Drain the oil in the seal cham ber
by removing the drain plug on
the side of the unit. If it con tains
water, the lower seal has failed
and should be replaced. The
mo tor hous ing should be drained
and the upper seal replaced if
the lower seal has failed, since
foreign material in the seal
chamber may have dam aged the
upper seal.
Remove the propeller after first
removing center set screw at the
end of the motor shaft.
Using a pair of snap ring pliers,
remove the snap ring that secures
the lower seal. Remove the lower
seal rotating elements by sliding
the spring off the shaft. Then
using two screwdrivers, slide the
carbon assembly off by prying on
the retaining ring.
Loosen and remove the cap
screws that hold on the seal
housing, then re move the seal
housing. Using a socket that will
fit onto the back of the seal, tap
the sta tion ary seal assembly out
of the seal housing.
Using a pair of snap ring pliers,
remove the snap ring that secures
the up per seal. Remove the spring
retainer and spring from the shaft,
and using the same method as
used for the lower seal, remove
the carbon seal assembly.
With a pair of screwdrivers, pry
up on the seal/bearing plate.
Remove the seal/bearing plate
®
until you have access to the
seal sensor wire, then carefully
pull the seal sensor wire off the
seal probe which will allow the
complete removal of the seal/
bearing plate.
Take a socket and tap out the
stationary portion of the seal from
the seal/bearing plate in the same
manner as used for the lower
stationary seal.
After checking both of the
O-rings, replace the seal bearing
plate in the motor housing,
making sure that the seal sensor
wire has been reattached to the
seal probe. Use O-ring lube to
prevent cutting in assembly.
Take the sta tion ary portion of
the new seal, and lube the rubber
material with a good quality
dielectric oil. Press the stationary
portion of the new seal into the
seal/bearing plate.
CAUTION: Do not reuse old seal
parts. Replace all parts with new.
Mixing old and new parts could
cause im me di ate seal failure.
3
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