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Power Exhaust
J8-3
15
C
TB1
THERMOSTAT
PL
PEC
TAN
GRA
LCTB
C08120
Fig. 58 -- PremierLinkt Power Exhaust Output
Connection
Space Relative Humidity Sensor — The RH sensor is not
used with 48TC models at this time.
CCN Communication Bus — The PremierLink controller
connec ts to the bus in a daisy chain arrangement.
Negative pins on each component must be connected to
respective negative pins, and likewise, positive pins on
each component must be connected to respective positive
pins. The controller signal pins must be wired to the signal
ground pins. Wiring connections for CCN must be m ade
at the 3--pin plug.
At any baud (9600, 19200, 38400 baud), the number of
controllers is limited to 239 devices maximum. Bus length
may not exceed 4000 ft (1219m), with no more than 60
total devices on any 1000--ft (305m) section. Optically
isolated RS--485 repeaters are required every 1000 ft
(305m).
NOTE: Carrier device defa ult is 9600 baud.
COMMUNICATION BUS WIRE SPECIFICATIONS —
The CCN Communication Bus wiring is field--supplied
and fi eld--installed. It consists of shielded 3--conductor
cable with drain (ground) wire. The cable selec ted must
be identical to the CCN Communication Bus wire used for
the entire network.
See Table 19 for recommended cable.
Table 19 – Recommended Cables
MANUF ACTURER CABLE PART NO.
Alpha 2413 or 5463
American A22503
Belden 8772
Columbia 02525
NOTE: Conductors and drain wire must be at least 20
AWG, stranded, and tinned copper. Indivi dual conductors
must be insulated with PVC, PVC/nylon, vinyl, Teflon, or
polyethylene. An aluminum/polyester 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 is required. Do not run communication wire
in the same conduit as or next to any AC voltage wiring.
The communication bus shields must be tied together at
each system element. If the communication bus is entirely
within one building, the resulting continuous shield must
be connected to ground at only one single point. If the
communication bus cable exits from one building and
ente rs another building, the shie lds must be connected to
the grounds at a lightning suppressor in each building (one
point onl y).
Connect ing CCN bus:
NOTE: When connecting the communication bus cable,
a color code system for the entire network is
recom mended to simplify installa tion and checkout. See
Table 20 for the recommended color code.
Table 20 – Color Code Recommendations
SIGNAL TYPE
CCN BUS WIRE
COLOR
CCN PLUG PIN
NUMBER
+ Red 1
Ground White 2
--- Black 3
Connect the CCN (+) lead (typically RED) to the unit’s
TB1--12 terminal. Connect the CCN (ground) lead
(typically WHT) to the unit’s TB1 --14 terminal. Connect
the CCN (--) lead (typically BLK) to the unit’s TB1--16
terminal. See Fig. 59.
CCN Bus
J2-1
J2-2
GND (WHT)
12
14
TB1
J2-3
– (BLK)
16
TB1
TB1
PL
+ (RED)
C08276
Fig. 59 -- PremierLink CCN Bus Connections
RTU--MP CONTROL SYSTEM
The RT U--MP controller, see Fig. 60, provides expanded
stand--alone operation of the HVAC system plus
connec tion and control through communica tion with
several Building Automation Systems (BAS) t hrough
popular third --party network systems. The available
network systems are BACnet MP/TP, Modbus and
Johnson J2. Communication with LonWorks is also
possible by adding an accessory interface card to the
RTU--MP. Selection of the communication protocol and
baud rate are made at on--board DIP switches.
Carrie r’s diagnostic display tools BACviewer6 Handheld
and Virtual BACview (loaded on a portable PC) must be
used with the RTU--MP controller. Connection to the
RTU--MP board is at the J12 access port, see Fig. 60.
The RTU--MP control is factory--mounted in the 48TC
unit’s main control box, to the left of the LCTB. See Fig.
61. Factory wiring is completed through harnesses
connected to the LCTB. Field connections for RTU --MP
sensors will be made at the Phoenix connectors on the
RTU--MP board. The factory--installed RTU--MP control
includes the supply--air temperature (SAT) sensor. The
outdoor air temperature (OAT) sensor is included in the
FIOP/accessory EconoMi$er 2 package.
Refer to Table 21, RTU--MP Controller Inputs and
Outputs, for locations of all connections to the RTU--MP
board.
48TC