Carrier 40UV Installation, Start-Up And Service Instructions Manual page 35

Air Quality Sensor Wiring — To wire the sensor after it has
been mounted in the conditioned space, see Fig. 22 and the
installation instructions shipped with the sensor. For each
sensor, use 2-conductor 18 AWG twisted-pair cables
(unshielded) to connect the separate isolated 24 vac power
source to the sensor and to connect the sensor to the control
board terminals.
To connect the sensor to the control board, identify the
positive (+) and negative (–) output terminals to the sensor
terminal block and connect the positive terminal to terminal
J1
POWER
J4
SERVICE CONNECTOR
J3
CCN
T26
24Vdc
T28
T29
COOLING
OUTPUT
T30
T31
T32
HEATING
OUTPUT
T33
T34
MIXED AIR
T35
DAMPER
OUTPUT
T36
T37
HEATING
T38 ENABLE
COOLING
T39
ENABLE
K3
HI/MED
FAN SPEED
NO NC COM
ADJ
AQ
CCN
COM
GND
MAT
OA ENTH — Outdoor-Air Enthalpy
OAT
SPT/RAT
SAT
MAT
OAT
ANALOG
SENSOR
INPUTS
SPT ADJ
AQ
RH
FAN STATUS
OA ENTH
REMOTE
S/S
DISCRETE
FIRE SMOKE
SWITCH
INPUTS
LOW LIMIT
CHANGE OVER
SPARE
COMMON
GND
K2
MED/LO
K1
FAN SPEED FAN ON/OFF
NO COM NO NC
NC
— Adjust
— Air Quality
— Carrier Comfort Network®
— Common
— Ground
— Mixed-Air Temperature Sensor
— Outdoor-Air Temperature Sensor
Fig. 22 — Air Quality Sensor Wiring
T13. Connect the negative terminal to terminal T14 on the
control board. Mount a field-supplied Class II, 24 vac trans-
former with a 40 va rating in a suitable location inside the unit's
control box. Wire the transformer primary to line voltage
power after any fuses and disconnect switches. Ensure the
transformer primary voltage rating matches the unit's voltage
rating. Refer to the wire label diagram shipped with the unit.
Connect one of the transformer secondary leads to the 24 vac
power terminal of the sensor. Connect the remaining secondary
lead to the ground terminal sensor.
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
+
T13
AQ
-
T14
T15
T16
T17
T18
T19
T20
T21
T22
T23
T24
T25
COM
LEGEND
NC — Normally Closed
NO — Normally Open
RAT — Return-Air Temperature Sensor
S/S — Start/Stop
SAT — Supply-Air Temperature Sensor
SPT — Space Temperature Sensor
RH — Relative Humidity
35
FIELD SUPPLIED
ISOLATED 24VAC
POWER SOURCE