RKI Instruments 65-2438 - Manual (Page 8)

4 • 65-2438 CO Detector
NOTE: If the mounting site requires the detector installation to be explosion proof, you
must install the detector in a Killark HKB junction box with a Killark HFC,
HK2D, or HK4D cover.
Wiring the CO Detector to a Controller
WARNING: Always verify that the power source is OFF before you make wiring
connections.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Remove the junction box cover.
WARNING: To maintain the explosion proof classification of the CO detector/junction
box combination, a conduit seal must be used within 18 inches of the
junction box conduit hub used for wiring to the controller.
4. Guide a two-conductor, shielded cable or two wires in conduit through an unused
conduit hub of the junction box.
5. Connect the two wires to the detector using an appropriate terminal block.
CAUTION: If using shielded cable, leave the drain wire insulated and disconnected at the
detector. You will connect the opposite end of the cable’s drain wire at the controller.
6. Secure the junction box cover to the junction box.
7. Route the cable or wires leading from the CO detector through one of the conduit
hubs at the controller housing.
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.
8. Connect the wires to the applicable controller terminal strip. See the controller
operator’s manual and the controller’s detector head specification sheet.