40
Table 18 – Thermostat Mode
TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL
1 RAT SEN Analog (10k thermistor)
2 G Discrete, 24VAC
3 RAT SEN Analog (10k thermistor)
4 Y1 Discrete, 24VAC
5
6 Y2 Discrete, 24VAC
7 LOOP---PWR Analog, 24VDC
8 W1 Discrete, 24VAC
9 I A Q --- S E N A n a l o g , 4 --- 2 0 m A
10 W2 Discrete, 24VAC
11 I A Q --- C O M / O A Q --- C O M / R H --- C O M A n a l o g , 4 --- 2 0 m A
12 CCN + (RED) Digital, 5VDC
13 O A Q --- S E N / R H --- S E N A n a l o g , 4 --- 2 0 m A
14 CCN Gnd (WHT) Digital, 5VDC
15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC
16 CCN --- (BLK) Digital, 5VDC
LEGEND:
CCN --- Carrier Comfort Network (communication bus)
G --- T h e r m o s t a t F a n
IAQ --- Indoor Air Quality (CO
2
)
OAQ --- Outdoor Air Quality (CO
2
)
RAT --- Return Air Temperature
RH --- Relative Humidity
W1 --- Thermostat Heat Stage 1
W2 --- Thermostat Heat Stage 2
Y1 --- Thermostat Cool Stage 1
Y2 --- Thermostat Cool Stage 2
Connect T--56 — See Fig. 46 for T--56 internal
connec tions. Install a jumper be tween SEN and SET
terminals as illustrated. C onnect T--56 terminals to TB1
terminals 1, 3, and 5 (see Fig. 47).
2
3
45
61
SW1
SEN
SET
Cool Warm
BRN (GND)
BLU (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
JUMPER
TERMINALS
AS SHOWN
BLK
(T56)
C08202
Fig. 46 -- T--56 Internal Connections
SEN J6-7
J6-6
1
3
TB1 PL
SEN
SET
Jumper
TB1
PL
J6-5
5
SET
C08213
Fig. 47 -- PremierLink T--56 Sensor
Connect Thermostat — A 7--wire the rmostat connection
requires a 24--v power source and a common connection.
Use the R and C terminals on the LCTB’s THERMOSTAT
connec tion strip for these. Connect the thermostat’s Y1,
Y2, W1, W2 and G terminals to PremierLink TB1 as
shown in Fig. 48.
G J4-12
J4-10
J4-8
Y1
Y2
2
R
R
4
6
J4-6
J4-4
W2
C
8
10
C
SPACE
THERMOSTAT
PL
LCTB
THERMOSTAT
W1
TB1
LCTB
THERMOSTAT
C08119
Fig. 48 -- 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 instal led). T his sensor may be a T--55
Space Sensor (se e Fig. 44) 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. 45. Temperature --resistance
chara cteristic is found in Table 15.
48TC
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