Carrier PF4MNB Series Installation Instructions Manual page 6

PF4MNB, PF4MNP: Installation Instructions
Line Voltage Connections
If unit contains an accessory electric heater, remove and discard power
plug from fan coil and connect male plug from heater to female plug
from unit wiring harness. (See Electric Heater Installation Instructions.)
For units without electric heat:
1. Connect 208/230V power leads from field disconnect to yellow and
black stripped leads.
2. Connect ground wire to unit ground lug.
NOTE: Units installed without electric heat should have a field-supplied
sheet metal block-off plate covering the heater opening. This will reduce
air leakage and formation of exterior condensation.
24V Control System
Connection To Unit
Wire low voltage in accordance with wiring label on the blower
thru Fig. 12). Use no. 18 AWG color-coded, insulated (35°C minimum)
wire to make the low-voltage connections between the thermostat, the
unit, and the outdoor equipment. If the thermostat is located more than
100-ft (30 m) from the unit (as measured along the low-voltage wire),
use no. 16 AWG color-coded, insulated (35°C minimum) wire. All
wiring must be NEC Class 2 and must be separated from incoming
power leads.
Refer to outdoor unit wiring instructions for any additional wiring
procedure recommendations.
THERMOSTAT
RED
R
GRY
G
WHT
W
WHT
BLU
VIO
BRN
Y
Fig. 9 – Wiring Layout Air Conditioning Unit
(Cooling Only)
THERMOSTAT
RED
R
GRY
G
WHT
W
WHT
BLU
VIO
BRN
Y
Fig. 10 – Wiring Layout Air Conditioning Unit
(Cooling and 1-Stage Heat)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
FAN COIL
(CONTROL)
R
G
W
2
W
3
E
AIR COND.
C
C
Y
FAN COIL
(CONTROL)
R
G
W
2
W
3
E
AIR COND.
C
C
Y
THERMOSTAT
R
G
C
W
2
E
L
O
(Fig. 9
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 operation. For 208V applications,
disconnect the black wire from the 230V terminal on transformer and
connect it to the 208V terminal
A94058
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.
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
A94059
a heat pump defrost cycle. Refer to
with outdoor thermostat.
6
FAN COIL
HEAT PUMP
(CONTROL)
(CONTROL)
RED
R
R
GRY
G
BRN
C
C
WHT
W
2
BLU
W
3
VIO
E
W
O
Y
FAN COIL
HEAT PUMP
(CONTROL)
(CONTROL)
R
G
C
W
2
W
3
E
ODTS
(Fig. 13).
SECONDARY
BRN
RED
YEL
BLK
PRIMARY
Fig. 12 for typical low voltage wiring
2
A94060
R
C
W
2
O
Y
A03088
A05182