Ground Connections; Electrical Shock Hazard - Carrier FB4CNF Installation Instructions Manual

FB4CNF, FB4CNP, FX4D: Installation Instructions
THERMOSTAT
RED
R
GRY
G
W
WHT
Y
Fig. 10 – Wiring Layout Air Conditioning Unit
(Cooling and 1-Stage Heat)
THERMOSTAT
R
G
C
W
2
E
L
O
Y
Fig. 11 – Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with No Outdoor Thermostat)
THERMOSTAT
R
G
C
W
2
E
L
O
Y
Fig. 12 – Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat for Manufactured Housing)
TRANSFORMER INFORMATION
Transformer is factory wired for 230V
applications, disconnect the black wire from the 230V terminal on
transformer and connect it to the 208V terminal (refer to Fig. 13).
SECONDARY
Fig. 13 – Transformer Connections
HEATER STAGING
If electric heat staging is required, a multi-stage heating room thermostat
is required. Consult your equipment supplier for a suitable thermostat.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
FAN COIL
(CONTROL)
R
G
WHT
W
2
BLU
W
3
VIO
E
BRN
AIR COND.
C
C
Y
FAN COIL
HEAT PUMP
(CONTROL)
(CONTROL)
RED
R
R
GRY
G
BRN
C
C
WHT
W
2
BLU
W
3
VIO
E
W
2
O
Y
A94060
FAN COIL HEAT PUMP
(CONTROL)
(CONTROL)
R R
G
C C
W W
2
2
W
3
E
ODTS
O
Y
operation. For 208V
BRN
RED
YEL
BLK
PRIMARY
MANUFACTURED HOUSING
In manufactured housing applications, the Code of Federal Regulations,
Title 24, Chapter XX, Part 3280.714 requires that supplemental electric
heat be locked out at outdoor temperatures above 40_F (4_C), except for
a heat pump defrost cycle. Refer to Fig. 12 for typical low voltage wiring
with outdoor thermostat.

GROUND CONNECTIONS

NOTE: Use UL listed conduit and conduit connectors for connecting
supply wire(s) to unit to obtain proper grounding. Grounding may also
be accomplished by using grounding lugs provided in control box.
A94059

ELECTRICAL SHOCK HAZARD

Failure to establish uninterrupted or unbroken ground could result in
personal injury and/or death.
According to NEC, NFPA 70, and local codes, the cabinet must have an
uninterrupted or unbroken ground to minimize personal injury if an
electrical fault should occur. The ground may consist of electrical wire
or metal conduit when installed in accordance with existing electrical
codes. If conduit connection uses reducing washers, a separate ground
wire must be used.
MINIMUM CFM AND MOTOR SPEED SELECTION
The fan speed selection is done at the motor connector. Units with or
without electric heaters require a minimum CFM. Refer to the unit
wiring label to ensure that the fan speed selected is not lower than the
A94060 minimum fan speed indicated.
Speed Taps may be located on motor,
A03088
or on plug close to motor.
Fig. 14 – Motor Speed Selection
Tap 1
Tap 2
Tap 3
A05182
Electric heat †
Tap 4
Tap 5
† electric heat airflow is same CFM as Tap 3, except 0 sec off delay
‡ high static applications, see airflow tables for max airflow
6
WARNING
!
1 2 3 4 5
1 2 3 4 5
Table 1 – Fan Speed Selection
Low 90 sec off delay
Medium 90 sec off delay
High 90 sec off delay
0 sec off delay
Max ‡ 0 sec off delay
A11048