Carrier 48TCA04---A12 Service And Maintenance Instructions page 38

TB1 TERMINAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LEGEND:
CCN --- Carrier Comfort Network (communication bus)
G --- Thermostat Fan
IAQ --- Indoor Air Quality (CO
OAQ --- Outdoor Air Quality (CO
RAT --- Return Air Temperature
Connect T- - 56 - - See Fig. 45 for T- - 56 internal
connections. Install a jumper between SEN and SET
terminals as illustrated. Connect T- - 56 terminals to TB1
terminals 1, 3 and 5 (see Fig. 46).
1 2 6
3 4 5
WHT(GND)
SEN SET
SW1
BRN (GND)
BLU (SPT)
Cool Warm
Fig. 45 - - T- - 56 Internal Connections
SEN
SEN
Jumper
SET
SET
Fig. 46 - - PremierLink T- - 56 Sensor
Table 18 – Thermostat Mode
FIELD CONNECTION
RAT SEN
G
RAT SEN
Y1
Y2
LOOP---PWR
W1
IAQ ---SEN
W2
IAQ ---COM/OAQ ---COM/RH ---COM
CCN + (RED)
OAQ ---SEN/RH ---SEN
CCN Gnd (WHT)
AUX OUT (Power Exhaust)
CCN --- (BLK)
)
2
)
2
RED(+)
CCN COM
BLK(-)
BLK
(T56)
SENSOR WIRING
JUMPER
TERMINALS
AS SHOWN
C08202
TB1 PL
1 J6-7
TB1 PL
J6-6
3
5 J6-5
C08213
Analog (10k thermistor)
Analog (10k thermistor)
(Output) Discrete 24VAC
RH --- Relative Humidity
W1 --- Thermostat Heat Stage 1
W2 --- Thermostat Heat Stage 2
Y1 --- Thermostat Cool Stage 1
Y2 --- Thermostat Cool Stage 2
Connect Thermostat — A 7- - wire thermostat connection
requires a 24- - v power source and a common connection.
Use the R and C terminals on the LCTB's THERMOSTAT
connection strip for these. Connect the thermostat's Y1,
Y2, W1, W2 and G terminals to PremierLink TB1 as
shown in Fig. 47.
SPACE
THERMOSTAT THERMOSTAT
R
G
Y1
Y2
W1
W2
C
Fig. 47 - - Space Thermostat Connections
If the 48TC unit has an economizer system and
free- - cooling operation is required, a sensor representing
Return Air Temperature must also be connected
(field- - supplied and installed). This sensor may be a T- - 55
Space Sensor (see Fig. 43) installed in the space or in the
return duct, or it may be sensor PNO 33ZCSENSAT,
installed in the return duct. Connect this sensor to TB1- - 1
and TB1- - 3 per Fig.
characteristic is found in Table 15.
Configure the unit for Thermostat Mode — Connect to the
CCN bus using a CCN service tool and navigate to
38
INPUT SIGNAL
Discrete, 24VAC
Discrete, 24VAC
Discrete, 24VAC
Analog, 24VDC
Discrete, 24VAC
Analog, 4---20mA
Discrete, 24VAC
Analog, 4---20mA
Digital, 5VDC
Analog, 4---20mA
Digital, 5VDC
Digital, 5VDC
LCTB
R
TB1
PL
2
J4-12
J4-10
4
J4-8
6
J4-6
8
J4-4
10
LCTB
C
THERMOSTAT
C08119
44. Temperature- - resistance