Carrier WeatherMaker 48A020 Installation Instructions Manual page 26

T58 Communicating Thermostat — Carrier also has a fully
communicating thermostat which, if used, will be wired to the
CCN communication connections on TB3 as described in the Car-
rier Comfort Network ® Interface section below.
Carrier Comfort Network Interface — The rooftop units can be
connected to the CCN system. The communication bus wiring is
supplied and installed in the field. Wiring consists of shielded, 3-
conductor cable with drain wire. The system elements are connect-
ed to the communication bus in a daisy chain arrangement. The
positive pin of each system element communication connector
must be wired to the positive pins of the system element on either
side of it, the negative pins must be wired to the negative pins, and
the signal pins must be wired to signal ground pins. Wiring connec-
tions for CCN system should be made at the TB3 terminal block
using the screw terminals. The TB3 board also contains an RJ14
CCN plug that can be used to connect a field service computer or
other CCN device temporarily. There is also an RJ14 LEN (local
equipment network) connection that is used to connect a Naviga-
tor device or download software.
™
Conductors and drain wire must be 20 AWG minimum stranded,
tinned copper. Individual conductors must be insulated with PVC,
PVC/nylon, vinyl, Teflon 1 , or polyethylene. An aluminum/polyes-
ter 100% foil shield and an outer jacket of PVC, PVC/nylon,
chrome vinyl, or Teflon with a minimum operating temperature
range of –20°C to 60°C (–4°F to 140°F) is required. Table 9 lists
cables that meet the requirements.
1. Teflon is a registered trademark of DuPont.
TB5
RED
3
BLK
4
SENSOR 1
SPACE TEMPERATURE AVERAGING (4 SENSOR APPLICATION)
TB5
3
4
SENSOR 1
SENSOR 4
SENSOR 7
a48-6855
SPACE TEMPERATURE AVERAGING (9 SENSOR APPLICATION)
NOTE: Use T55 sensor only.
Fig. 26 — Space Temperature Averaging Wiring
SENSOR 4
SENSOR 3
SENSOR 2
SENSOR 2 SENSOR 3
SENSOR 6
SENSOR 5
SENSOR 9
SENSOR 8
Table 9 — CCN Connection Approved Shield Cable
MANUFACTURER
Alpha
American
Belden
Columbia
IMPORTANT: When connecting to CCN communication
bus to system elements, use color coding system for the
entire network to simplify installation and checkout. See
Table 10.
Table 10 — Color Code Recommendations
SIGNAL TYPE
Positive (+)
Ground
Negative (–)
If a cable with a different color scheme is selected, a similar color
code should be adopted for the entire network. At each system
element, the shields of the communication bus cables must be tied
together. If the communication bus is entirely within one building,
the resulting continuous shield must be connected to a ground at
one point only. If the communication bus cable exits from one
building and enters another, the shields must be connected to
grounds at the lightning 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.
26
CABLE PART NO.
2413 or 5463
A22503
8772
02525
CCN BUS CONDUCTOR CCN PLUG PIN
INSULATION COLOR
RED
WHITE
BLACK
NO.
1
2
3