Carrier FX4D 019 Installation Instructions Manual page 6

FAN COIL
THERMOSTAT
RED
R
GRY
G
BRN
C
WHT
W W
2
VIO
E
E
BLU
W
L
O
Y
Fig. 12 - - Wiring Layout Heat Pump Unit
(Cooling and 2- -Stage Heat with 1 Outdoor Thermostat)
FAN COIL
THERMOSTAT
RED
R R
GRY
G G
BRN
C
C
WHT
W W
2
L
W
E
E
O
Y
C 1 4 7 C
EMERGENCY HEAT RELAY
Fig. 13 - - Wiring Layout Heat Pump Unit (Cooling and
2- -Stage Heat with 2 Outdoor Thermostats)
HEAT PUMP
(CONTROL)
R
R
G
C
C
2
W
2
ODTS
3
O
Y
A09386
HEAT PUMP
(CONTROL)
R
C
2
W
2
BLU
ODTS1
3
VIO
ODTS2
O
Y
9 6 3
A09387
THERMOSTAT
FAN COIL
R
G
C
W W
2
W
E
L
O
Y
Fig. 14 - - 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. (See Fig. 15.)
SECONDARY
Fig. 15 - - Transformer Connections
Heater Staging
CAUTION
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
If W2, W3, and E on any 3 stage heater (18, 20, 24, or
30kW) are individually connected as with outdoor
thermostats or any other situation, emergency heat relay must
be used. This relay is in kit Part No. KHOT0201SEC and is
normally used with kit Part No. KHAOT0301FST for 2
outdoor thermostat systems.
The controls are factory circuited for single- -stage operation. For
2- -stage operation, use outdoor thermostat kit Part No.
KHAOT0301FST, and for 3- -stage use both kits Part No.
KHAOT0201SEC and KHAOT0301FST.
6
HEAT PUMP
(CONTROL)
R R
G
C C
W
2 2
3
E
ODTS
O
Y
A09388
BRN
RED
YEL
BLK
PRIMARY
A05182