RKI Instruments 65-2484RK - Manual (Page 32)

28 • 65-2484RK Multi Point Detector
Replacing the CO Detector
NOTE: In most cases, it is only necessary to replace the CO sensor.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the junction box cover from the top or bottom junction box, depending on
where your CO detector is installed. Refer to Figures 9 - 14 for CO detector location.
4. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5. Unscrew the detector from the junction box hub.
6. Guide the detector leads of the replacement detector through the junction box hub
then screw the mounting threads of the detector into the hub. If necessary for
environmental conditions, apply thread sealant or teflon tape to the hub and/or
detector threads to seal them.
7. Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet for the multi-point detector to verify the connections are correct.
Also see Figures 9-14 for wiring diagrams.
8. Reinstall the junction box cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller and place into normal operation.
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
11. Calibrate the replacement detector as described in the “Calibration, LEL, H
2
S, and CO
Detectors” on page 30.
ESM-01 Detector
This section includes a procedure to replace the ESM-01 sensor and one to replace the
entire detector assembly. In most cases it is not necessary to replace the entire detector
assembly.
Replacing the Plug-In ESM-01 Sensor
CAUTION: The plug-in sensor contains electrolyte which is a dilute acid. Do not disassemble the
sensor when replacing it with a new one. If sensor 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 with the splashguard from the detector housing
body. Make sure not to lose the cap gasket.
4. Unplug and remove the toxic sensor.
5. Carefully plug the replacement sensor into the connector that is located in the detector
housing body.