Sea Recovery Aqua Whisper DX 1400-2, Owner'S Manual

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Aqua Whisper DX Modular 450-1800
Page 8-5
Maintenance
3. The Electric Motor makes an unusual “grinding”
sound when operated.
Solutions
:
a) Check and replace as necessary the front and
rear bearings.
b) Check to see if the fan is rubbing against the
fan guard.
B. Booster Pump:
Replace the ceramic seal approximately every 2000
hours, or at the sign of leakage:
DISASSEMBLY:
Remove the four 3/8-16 Bolts holding the volute to
the motor bracket. To remove the impeller, remove the
bearing cap on the motor to expose the screwdriver slot
on the motor shaft. Hold the motor shaft with a large
screwdriver and remove the impeller by grasping it with
your hand and turning the impeller counter clockwise.
Remove the Seal. Two screwdrivers wedged into the seal
at 180º apart serve as tools to wedge the seal out. The
ceramic seat is removed by removing the end bell gasket.
REASSEMBLY:
Clean the motor shaft and the bracket of any corrosion
or salt deposits. Replace the end bell gasket and the tap
seat portion into the bracket cavity. Use a new gasket.
Place the ceramic seat into the cavity over the shaft.
Make sure that the polished side is toward the end of
the shaft. Tap into place evenly using a hollow piece of
wood or plastic tool. If a metal tool is used to tap it into
place, protect the seat with cardboard or a clean cloth.
Lubricate the shaft with water and soap or a light oil and
slip the rotating portion of the seal over the shaft with
the carbon element toward the ceramic. Slide it down
onto the shaft as far as possible. Apply blue Loctite to the
motor shaft threads. Hold the Motor shaft and reinstall
the impeller. Tighten the impeller by turning it clockwise
until it is snug. Reinstall the volute. Tighten the bolts
evenly. Thoroughly prime the pump.
Some Electric Motors supplied by Sea Recovery have
permanently sealed and lubricated bearings. Others
require lubrication from time to time. If your Electric
Motor has grease jerks at each end of the motor, over the
front and rear bearings, the bearings require lubrication
every 6 months. Give three pumps of high temperature
motor bearing lubricant into each grease jerk. Use a
Polyurea Base Grease such as Chevron SRI (Polyurea
Low voltage will also cause the same symptom.
Low voltage is caused by an undersized power
supply or generator, undersized power lead
wires to the System or motor, loose power wire,
or connection at the motor or within the power
supply line, and “burnt” contacts on the motor
starter relay (contactor).
Solutions :
a) Check wiring size and connections to,
from, and in between the Power Supply and
the electric motor. Correct wire size or any
loose wires.
b) Check the capacitor on the motor, and replace
it if it has shorted out.
c) Measure voltage at the motor during attempt
to start it. If voltage drops more than 10%
locate and correct the reason.
d) Check the motor starter relay (contactor) for
“burnt” contacts.
2. The Three Phase (230/380/460 VAC) Electric
Motor “hums”, pulls starting current (locked rotor)
amperage, does not rotate, and trips the supply
power circuit breaker when attempting to operate
the System.
The Three Phase Electric Motor requires all three
power lines (all three phases) to be operative else
it will “single phase” causing extensive damage to
the motor’s internal windings.
Low voltage will also cause the same symptom.
Low voltage is caused by an undersized power
supply or generator, undersized power lead
wires to the System or motor, loose power wire,
or connection at the motor or within the power
supply line, and “burnt” contacts on the motor
starter relay (contactor).
Solutions
:
a) Check wiring size and connections to,
from, and in between the Power Supply and
the electric motor. Correct wire size or any
loose wires.
b) Measure voltage at the motor during attempt
to start it. If voltage drops more than 10%
locate and correct the reason. Cross check
voltage across all 3 power leads.
c) Check the motor starter relay (contactor) for
“burnt” contacts.