RKI Instruments 65-2391RK User Manual
Page 9
65-2391RK CO
2
Transmitter • 5
If the detector is mounted to the junction box, skip to step 5. If not, continue with step 2.
2.
Remove the junction box cover.
3.
Guide the four wires that extend from the top of the detector through the bottom
conduit hub of the junction box.
4.
Screw the detector into the bottom conduit hub of the junction box.
5.
At the monitoring site, use #10 screws through the junction box’s two mounting holes
to secure the junction box to a vertical surface.
CAUTION:
Mount the CO
2
transmitter with the detector facing down (see Figure 2.)
Wiring the CO
2
Transmitter to a Controller
WARNING: Always verify that the power to the controller is off before you make
wiring connections.
1.
Turn off power to the controller.
2.
Place the controller’s power switch in the OFF position.
3.
Remove the junction box cover.
4.
Verify that the detector leads are wired to the amplifier’s interconnect terminal strip.
If necessary, connect the detector leads to the interconnect terminal strip as shown in
Figure 3.
5.
Guide a three-conductor, shielded cable or three wires in conduit through the top
conduit hub of the junction box.
6.
Connect the three wires to the interconnect terminal strip as follows (see Figure 3).
•
Connect the positive wire to the 24VDC terminal.
•
Connect the feedback wire to the 4-20 (FB) terminal.
•
Connect the negative wire to the GND (DC -) terminal.
CAUTION:
If shielded cable is used, leave the cable shield’s drain wire insulated and
disconnected at the transmitter. You will connect the opposite end of the cable’s drain
wire at the controller to chassis ground.
7.
Secure the junction box cover to the junction box.
8.
Route the cable or wires leading from the CO
2
transmitter through one of the conduit
hubs at the controller housing.
CAUTION:
Do not route power and transmitter wiring through the same conduit hub. The
power cable may disrupt the transmission of the transmitter signal to the
controller.