Carrier INFINITY 50XT-A - Special Procedures for 208- -V Operation

12
NOTE: Mis--wiring OAT inputs will not cause damage to either
Infinity control or thermistor. If the thermistor is wired incorrectly ,
no reading will appear at UI. Re--wire thermistor correctly for
normal operation.
C. Humidifier Connections
The fan coil control board terminal marked HUM is provided for
low voltage (24--vac) control of a humidifier . No humidistat is
required as UI monitors indoor humidity.
When commanded to operate humidifier, the unit control will
energize the HUM output to turn humidifier on and de-- energize
HUM output to turn humidifier off. Wire HUM and C terminals
directly to humidifier as shown in Fig. 14.
SPECIAL PROCEDURES FOR 208--V OPERATION
Be sure unit disconnect switch is open.
Disconnect the yellow primary lead from the transformer. See unit
wiring label (See Fig. 17).
Connect the yellow primary lead to the transformer terminal
labeled 200 --v.
HP/AC
BOARD
FAN COIL
BOARD
A09107
Fig. 13 -- Control Plate
A
B
D
C
AA
BB
DD
CC
Infinity Fan Coil
Board
Outdoor Air Thermistor
(Supplied with UI)
FIELD CONNECTION
REQUIRED
(BLACK WIRES)
YY
RR
O
W
HUM
C
OO
WW
HUMHUM
CC
LEGEND
Factory Wiring
Field Wiring
A
B
D
C
AA
BB
DD
CC
Infinity HP/ AC
Board
OAT
Y2Y2
OO
Y1Y1
W1W1
RR
CC
OCT
Outdoor Coil Thermistor
FACTORY CONNECTED
FACTORY WIRES PROVIDED
FOR FIELD CONNECTION
OF UTILITY CURTAILMENT
VIO
PNK
A
B
D
C
AA
BB
DD
CC
User
Interface
HUMIDIFIER
(24 VAC)
A06281
Fig. 14 -- Control Voltage Wiring Connections
50XT--A