RKI Instruments 65-2484RK-06 User Manual
Page 21
65-2484RK-06 Multi Point Detector • 17
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4.
Unplug and remove the H
2
S sensor.
5.
Carefully plug the replacement sensor into the socket pattern that is located in the
detector housing.
6.
Make sure the cap gasket is in place and screw the detector housing cap onto the
detector housing body.
7.
Turn on or plug in power to the controller.
8.
Turn on the controller.
CAUTION:
Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
9.
Calibrate the detector as described in “Calibration, LEL, and H
2
S, Detectors” on
page 19.
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 from the top junction box.
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 H
2
S detector to verify the connections are correct. Also see
Figure 6 for a wiring diagram.
8.
Reinstall the junction box cover.
9.
Turn on or plug in power to the controller.
10. Turn on the controller.
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 “Calibration, LEL, and H
2
S,
Detectors” on page 19.