65-2321RK Oxygen Transmitter • 11
Replacing Components of the Oxygen Transmitter
This section includes a procedure to replace the plug-in oxygen sensor, a procedure to
replace the entire oxygen detector assembly, and one to replace the amplifier. In most
cases, it is not necessary to replace the entire detector assembly.
Replacing The Plug-in Oxygen Sensor
CAUTION: The plug-in sensor contains electrolyte that is an irritant. Do not disassemble the
sensor when replacing it with a new one. If electrolyte comes in contact with your
skin, wash affected area thoroughly with soap and water.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4.
Unplug and remove the oxygen sensor.
5.
Carefully plug the replacement sensor into the socket pattern that is located in the
detector housing.
6.
Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
7.
Turn on power to the controller.
8.
Turn on the controller and place into normal operation.
CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
9.
Calibrate the detector as described in “Calibration” on page 13.
Replacing the Oxygen Detector
NOTE:
In most cases, it is only necessary to replace the plug-in sensor.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Remove the junction box cover.
4.
Remove the detector terminal strip from its socket.
5.
Disconnect the detector leads from the detector terminal strip. Note the position of the
color-coded leads as you remove them.
6.
Unscrew the detector from the junction box conduit hub.
7.
Guide the detector leads of the replacement detector through the bottom conduit hub
of the junction box, then screw the mounting threads of the detector into the conduit
hub. If necessary for environmental conditions, apply thread sealant or teflon tape to
the hub and/or detector threads to seal them.
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