RKI Instruments 61-0191RK User Manual
Page 9
61-1004RK/61-0191RK Carbon Dioxide Detector • 5
Wiring the CO
2
Detector to a Controller
WARNING: Always verify that the power to the controller is off before you make
wiring connections.
As mentioned in “Description” on page 2, the IR CO
2
detector wires to an RKI controller
the same way as an RKI LEL detector, to the LEL detector terminals. See Figure 3 below
for the wiring connections.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
If the detector is mounted remotely from a controller using the junction box, proceed
to step 4.
If the detector is mounted directly to a controller, it is normally factory wired. Confirm
that the detector’s wires are connected to the appropriate controller detector terminals
and skip to “Start Up” on page 7. See Figure 3, the controller operator’s manual, and
the controller’s detector head specification sheet for the 61-0191RK detector for the
wiring connections.
4.
Remove the cover from the junction box.
5.
Guide a four-conductor, shielded cable or four wires in conduit through the top
conduit hub of the junction box. Use appropriate conduit fittings and construction
technique for the environmental rating of the junction box. The junction box is rated
NEMA 4X.
6.
Connect the wires to the terminals opposite the detector leads.
CAUTION:
If using shielded cable. Leave the shield drain wire insulated and disconnected at the
61-1004RK. You will connect the opposite end of the cable’s drain wire at the
controller.
7.
Secure the junction box cover to the junction box.
8.
Route the cable or wires in conduit leading from the detector through one of the
conduit hubs at the controller. Use appropriate conduit fittings and construction
technique for the environmental rating of the controller. RKI controllers are typically
rated NEMA 4X.
CAUTION:
Do not route power and detector wiring through the same conduit hub. The power
cable may disrupt the transmission of the detector signal to the controller.
9.
Connect the wires to the applicable controller terminal strip. See the controller
operator’s manual and the controller’s detector head specification sheet for the
61-1004RK detector.