RKI Instruments 65-2320RK - Manual (Page 14)

10 • 65-2320RK Oxygen Transmitter
Replacing Components of the Oxygen Transmitter
This section includes a procedure to replace the oxygen detector, and a procedure to
replace the amplifier.
Replacing the Oxygen Detector
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.
8. Connect the detector leads to the appropriate detector terminal strip terminals.
Connect the white wire to the terminal labelled Oxy + and the green wire to the
terminal labelled Oxy -. See Figure 3 on page 6 for the detector wiring connections to
the amplifier.
9. Reinstall the detector terminal strip into its socket.
10. Reinstall the junction box cover.
11. Turn on or plug in power to the controller.
12. Turn on the controller and place it into normal operation.
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
13. Calibrate the replacement detector as described in “Calibration” on page 11.
Replacing the Amplifier
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the junction box cover.
4. Unplug the detector terminal strip and controller terminal strip from their sockets.
You may leave the wires connected to the terminal strips.
5. Unscrew and remove the screw with the flat and lock washers that secures the
amplifier to the junction box.
6. Remove the old amplifier.
7. Install the new amplifier into the junction box with the screw, lock washer, and flat
washer you removed in Step 5 above. A foam gasket that orients the amplifier and
keeps it from rotating is installed on the bottom of the amplifier. Make sure the
amplifier is seated flat in the junction box.