RKI Instruments 65-2435RK - Manual (Page 14)

14 • 65-2435RK CO Transmitter
CAUTION: The null potentiometer must be set whenever a sensor is changed or the hydrogen
compensation may not work properly.
15. Calibrate the replacement sensor as described in the Calibration section of this manual.
Replacing the Charcoal Filter
1. Turn off the controller.
2. Turn off or unplug incoming power at the power source end.
3. Unscrew the bottom section of the CO detector housing from the top section.
NOTE: Be sure the two cap gaskets remain seated and that they don’t fall out.
4. Unplug and remove the CO sensor with the boot and charcoal filter attached.
5. Remove the rubber boot that secures the charcoal filter to the CO sensor.
6. Remove the charcoal filter from the rubber boot.
7. Place the replacement filter in the rubber boot in the same position as the filter you removed in
the previous step.
8. Reinstall the rubber boot with charcoal filter to the CO sensor.
9. Carefully plug the replacement sensor into the socket pattern that is located in the top section
of the detector housing.
NOTE: Match the sensor’s male pins with the four female sockets as you plug the sensor into the
sockets.
10. Screw the bottom section of the detector housing onto the top section.
11. Turn on or plug in incoming power at the power source end.
12. Turn on the controller.
Replacing the Amplifier
1. Turn off the controller.
2. Turn off or unplug incoming power at the power source end.
3. Remove the junction box cover.
4. Disconnect the detector leads from the terminal strip.
5. Unscrew and remove the two screws that secure the amplifier to the junction box.
The screws are at the top left and bottom right of the amplifier.
6. Remove the amplifier.
7. Place the new amplifier in the same position as the old amplifier.
8. Use the two screws you removed in step 5 to secure the new amplifier to the junction box.