Instructions for Replacing Beckett 2N1R LWCO Sensor
Part No. 62075-001
PARTS LIST:
(1) 7600Pxx LWCO Sensor
(1) 1K ohm resistor - used for testing sensor
INSTRUCTIONS:
1. Remove power from the AquaSmart control.
2. Unplug the existing sensor from the connection
under the display and remove the sensor from
the well. If the sensor is mounted remotely from
the control, remove the well clip used for holding
the sensor cable in place and save for use when
installing the new sensor.
3. Disconnect the green sensor wire from the bullet/
connector, pipe clamp or from the green screw on
the AquaSmart control.
4. Before inserting the new sensor, use an ohm meter
to check the continuity of the LWCO circuit.
Attach
one of the meter probes to the connector, screw or
wire to which the green sensor lead was attached. The
second probe should go to metal on the boiler vessel
(not the boiler jacket).
5. A good connection reading 5 ohms or less should be
possible. Check all connections in the LWCO wiring
circuit for possible issues. If the reading is above 10
ohms, run a new ground wire from the green screw
on the control case to the boiler vessel. If a new wire
is used, connect the green lead on the new sensor to
the green screw when the new sensor is installed.
The
LWCO function will not operate properly without a
good connection from the green sensor lead back
to the boiler vessel.
6. Insert the replacement sensor into the well. Make
sure the sensor is fully seated. You should feel a
slight resistance when the sensor pin reaches the
clip in the well. Continue pushing until the sensor
comes to a solid stop. If the sensor is remotely
mounted, reinstall the clip used to hold the sensor
cable securely in place.
No Pin
Engagement
Full Pin
Engagement
7. Plug the main sensor cable into the connector under
the display.
8. Reconnect the green sensor lead to the bullet/
connector, pipe clamp or to the green screw on the
AquaSmart control.
9. Restore power to the AquaSmart Control. Allow the
control to go through the start-up process. Follow the
Control Checkout Procedure in the AquaSmart manual
to confirm proper operation of the control.
Proper
operation of the control must be confirmed before
leaving the installation site.
STANDBY
WTR: 120F
Normal Display in Standby
