Carrier 48LC Series Controls, Start-Up, Operation And Troubleshooting page 88

suppressor in each building where the cable enters or exits the
building (one point per building only).
To connect the unit to the network:
1. Turn off power to the control box.
2. Cut the CCN wire and strip the ends of the red (+), white
(ground), and black (–) conductors. (Substitute appropriate
colors for different colored cables.)
3. Connect the red wire to (+) terminal on CIB, the white wire
to COM terminal, and the black wire to the (–) terminal.
4. The RJ14 CCN connector on CIB can also be used, but is
only intended for temporary connection (for example, a
laptop computer running Carrier network software).
BUILDING SUPERVISOR
NETWORK
OPTIONS
REMOTE
AUTODIAL
CCN SITE
GATEWAY
NON CARRIER
HVAC
EQUIPMENT
CONTROLLER
LEGEND
CCN – Carrier Comfort Network
CL – ComfortLink Controls
DAV – Digital Air Volume
HVAC – Heating, Ventilation, and
Air Conditoning
TCU – Terminal Control Unit
CCN BUS
TERMINAL
SYSTEM
MANAGER
COMFORT
®
Fig. 43 — CCN System Architecture
5. Restore power to unit.
IMPORTANT: A shorted CCN bus cable will prevent some
routines from running and may prevent the unit from starting.
If abnormal conditions occur, unplug the connector. If condi-
tions return to normal, check the CCN connector and cable.
Run new cable if necessary. A short in one section of the bus
can cause problems with all system elements on the bus.
ROOFTOP
UNIT
CL
ROOFTOP
UNIT
CL
HEATING/COOLING UNITS
CL TCU
DAV AIR
ROOFTOP
TERMINAL
UNIT
AIR DISTRIBUTION-DIGITAL AIR VOLUME CONTROL (DAV)
88
ROOFTOP
UNIT
CL
ROOFTOP
UNIT
CL
TO
ADDITIONAL
TERMINALS
TCU
TCU
DAV AIR
TERMINAL
DAV FAN
POWERED
MIXING
BOX