RKI Instruments 65-2396RK User Manual
Page 16
12 • 65-2396RK CO
2
Transmitter
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 detector terminal strip as shown in Table 4 below
and Figure 3 on page 7 of this manual.
9.
Reinstall the detector terminal strip into its socket.
10. Reinstall the junction box cover.
11. Turn on or plug in power to the controller.
12. Turn on the controller and place it into normal operation.
NOTE:
When first powered up, the transmitter will enter about a one minute period
when the 4-20 mA output is stabilizing and may be above the controller alarm
points or well below zero momentarily. RKI controllers have a one minute
warmup period when the controller does not display any gas reading or give any
alarm indication. The CO
2
transmitter’s 4-20 mA signal should be stable by the
time the controller’s warmup period is over.
CAUTION:
Allow the replacement detector to warm up for 5 minutes before you continue with
the next step.
13. Calibrate the transmitter as described in “Calibration” on page 14 of this manual.
Replacing the Amplifier
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Remove the junction box cover.
4.
Unplug the detector terminal strip and controller terminal strip from their sockets.
You may leave the wires connected to the terminal strips.
5.
Unscrew and remove the screw with the flat and lock washers that secures the
amplifier to the junction box.
6.
Remove the old amplifier.
7.
Place the new amplifier in the same position as the old amplifier. A foam gasket that
orients the amplifier and keeps it from rotating is installed on the bottom of the
amplifier. Make sure the amplifier is seated flat in the junction box.
8.
Install the new amplifier into the junction box with the screw, lock washer, and flat
Table 4:Reconnecting the CO
2
Detector to the Amplifier
Detector Lead
Detector Terminal Strip
Red
LEL “R”
White
LEL “W”
Green
LEL “G”
Black
LEL “B”