RKI Instruments 65-2434RK - Manual (Page 14)

10 • 65-2434RK CO Transmitter
Replacing the Amplifier PCB
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Remove the enclosure’s cover by unscrewing the four cover screws, one at each
corner.
4. Disconnect the wires from the interconnect terminal strip.
5. Unplug the CO sensor from the amplifier PCB to access one of the PCB mounting
screws.
6. Unscrew and remove the two screws that secure the amplifier PCB to the enclosure.
The screws are near the top and bottom of the amplifier PCB.
7. Remove the amplifier PCB.
8. Place the new amplifier PCB in the same position as the one you removed in step 6.
9. Use the two screws you removed in step 5 to secure the PCB to the enclosure.
10. Reconnect the wiring from the controller to the interconnect terminal strip as shown
in Table 2 and Figure 3.
11. Carefully plug the CO sensor with rubber boot and charcoal filter into the socket
pattern on the amplifier PCB.
NOTE: Match the sensor’s male pins with the four female sockets as you plug the sensor
into the sockets.
12. Secure the cover to the enclosure.
13. Turn on or plug in incoming power to the controller.
14. Turn on the controller.
CAUTION: Allow the sensor to warm up for 5 minutes before you continue with the next step.
15. Calibrate the CO transmitter as described in the Calibration section of this insert.
Replacing the Charcoal Filter
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the enclosure’s cover by unscrewing the four cover screws, one at each
corner.
4. Unplug the CO sensor from the amplifier PCB.
5. Remove the rubber boot that secures the charcoal filter to the CO sensor.
Table 2: Reconnecting the CO Transmitter to a Controller
Amplifier PCB
Interconnect Terminal Strip
Controller
Transmitter Terminal Strip
(typical)
FB 4 - 20 (FB)
+V + V (10 VDC - 30 VDC)