RKI Instruments 65-2484RK User Manual
Page 33
65-2484RK Multi Point Detector • 29
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 an SO
2
sensor, you must replace it with an SO
2
sensor.
6.
Make sure the cap gasket is in place and screw the detector housing cap with the
splashguard back onto the detector housing body.
7.
Turn on 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, ESM-01 Toxic Detector” on
page 33.
Replacing the ESM-01 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 incoming 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 conduit hub.
6.
Guide the detector leads of the replacement detector through the controller conduit
hub or junction box conduit 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.
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, ESM-01 Toxic
Detector” on page 33.