Leak Sensor Leak Sensor Repair Sensor Repair - Graco Husky 3300e Manual

Leak Sensor Sensor Repair Repair
Leak Leak Sensor Repair
The leak sensor can be replaced or re-positioned.
When properly positioned, the two arrows imprinted
on two of the flat surfaces of the leak sensor hex
head are vertical and pointing down.
Leak Leak Sensor Leak Sensor Sensor Testing Testing Testing
Testing the continuity of the leak sensor is possible
to ensure proper operation. If continuity testing
indicates that the leak sensor is not functional, a
replacement kit, 25B435, can be ordered separately.
1. Follow the Pressure Relief Procedure, page
Remove power to the motor and VFD.
2. To test the leak sensor without removing from
the pump:
a. Note the connection locations of the leak
sensor wires within the VFD or other
monitoring device, then disconnect the leak
sensor wires.
b. Use an ohmmeter attached to the leak
sensor leads to test the conductivity of the
leak sensor. Continuity is affirmed by a
reading of 0-5 ohms.
c. Loosen the leak sensor bushing 1/2 turn
(leak sensor arrows point up).
d. Use an ohmmeter attached to the leak sensor
leads to test the conductivity of the leak
sensor. An open circuit should be indicated.
Normal operation position shown by dark
float. Lighter float line indicates the open
circuit position.
3A7037G
e. If the continuity test result indicates that
the leak sensor is not functioning properly,
proceed to step 3. Otherwise, tighten the
bushing to its original position so that the
arrows on the leak sensor point down. Attach
the removed leak sensor wires to the point
where they were disconnected from the VFD
or other monitoring device.
f. Apply air pressure to the pump and use a
soapy solution around the bushing to ensure
an air tight seal. If air bubbles appear, it will
be necessary to return to the steps above for
air pressure relief and removing the bushing
11.
from the pump. Apply new thread sealer
on the bushing and install in the pump so
that the leak sensor is properly positioned.
Repeat this step to test for air leakage around
the bushing.
3. Remove and replace the leak sensor at the
pump:
a. Note the connection locations of the leak
sensor wires within the VFD or other
monitoring device, then disconnect the leak
sensor wires.
b. Remove the leak sensor and bushing from
the pump center section.
c. Apply thread tape or paste to the bushing
threads and screw finger tight into the pump.
d. To ensure a watertight seal, apply Loctite
425 Assure™ threadlocker supplied with the
leak sensor kit to the leak sensor threads
and screw the leak sensor into the bushing.
e. Verify that the leak sensor was properly
oriented in the pump so that the arrows
imprinted on the leak sensor hex head are
vertical positioned with the arrows pointing
down. It may be necessary to further tighten
both the bushing and leak sensor to achieve
proper positioning.
f. Use an ohmmeter attached to the leak
sensor leads to test the conductivity of the
leak sensor. Continuity is affirmed by a
reading of 0-5 ohms. Attach the leak sensor
wires to the VFD or other monitoring device.
g. Apply air pressure to the pump and use a
soapy solution around the bushing to ensure
an air tight seal. If air bubbles appear, it will
be necessary to return to the steps above for
air pressure relief and removing the bushing
from the pump. Apply new thread sealer
on the bushing and install in the pump so
that the leak sensor is properly positioned.
Repeat this step to test for air leakage around
the bushing.
Repair
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