Johnson Controls UNT110-1 - Page 54

54
UNT Controller—Unitary (UNT) Controller
120 VAC 24 VAC
prtwire2
BINARY IN
ANALOG INPUTS
BINARY OUTPUTS
AI CM AI 1
AI CM
AI 2
AI CM AI 3 AI CM AI 4
AI CM
AI 5
AI CM
AI 6
+15VDC
24 VAC
BI 1
BI 2
BI 3
BI 4
+15VDC
BO 1
24VAC BO 2
BO 3
BO 4
BO 5
BO 6
COMMON
TRIAC
BO 7
COMMON
COMMON
COMMON COMMON
BO 8
TE1
Room
Sensor
TE2
TE3
120 VAC 24 VAC
120/24 VAC
S1
24 VAC 24 VAC 24 VAC
DA1
COM BUS
R: Equipment 24 VAC
B: Equipment Ground
G: Indoor Blower
W1: Heat-Stage 1
W2: Heat-Stage 2
Y1: Cooling-Stage 1
Y2: Cooli ng Stage 2
* Phase correctly and size the transformer to include 20 VA for the M100C series actuator.
*
Unit Terminal Strip
Triac
Jumper
Removed
R Y
Power
Transformer
120/24 VAC
T1 T2
R B G W1 W2 Y1 Y2
24VAC
COM
ZBUS
REF
N2-
N2+
B
Figure 28: Packaged Rooftop Wiring Example with Separate Transformers
for Controller and Loads