65-2427-05-01 H
2
S Detector • 15
WARNING: The H
2
S sensor will not operate properly if the wire jumper is not removed.
7. Install the spacer and rubber boot onto the replacement sensor’s face.
8. Carefully plug the replacement sensor into the four-socket pattern that is located in the
detector housing.
9. Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
10. Turn on or plug in power to the controller.
11. 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.
12. Calibrate the replacement sensor as described in the Calibration section of this manual.
Replacing the H
2
S Detector
NOTE:
In most cases, it is only necessary to replace the H
2
S sensor.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the junction box cover.
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.
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
to verify the connections are correct.
8. Reinstall the junction box cover.
Figure 5: Plug-In Sensor Jumper Removal
Remove jumper
