16 • 65-2340RK Toxic Gas Transmitter
6. Carefully plug the replacement sensor into the connector that is located in the detector
housing body.
WARNING: You must replace the plug-in sensor with the same type of sensor that is
installed. A detector cannot be converted from one type of detector to another
by using a different plug-in sensor. For example, if you are replacing a Cl
2
sensor, you must replace it with a Cl
2
sensor.
7. Make sure the cap gasket is in place and screw the detector housing cap with the
splashguard back onto the detector housing body.
8. Turn on power to the controller.
9. 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.
10. Calibrate the detector as described in “Calibration” on page 18.
Replacing the Toxic 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.
8. Connect the detector leads to the appropriate detector terminal strip terminals. Connect the
black wire to the terminal labelled TOXIC - and the color coded wire to the terminal
labelled TOXIC +. See Figure 5 on page 12 for the detector wiring connections to the
amplifier and the detector wire color coding.
9. Reinstall the junction box cover.
10. Turn on or plug in power to the controller.
11. Turn on the controller and place it into normal operation.
