FX4D: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
6
A09383
Fig. 9 – Wiring Layout Air Conditioning Unit
(Cooling Only)
A09384
Fig. 10 – Wiring Layout Air Conditioning Unit
(Cooling and 1-Stage Heat)
A09385
Fig. 11 – Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with No Outdoor Thermostat)
A09386
Fig. 12 – Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with 1 Outdoor Thermostat)
HEATER STAGING
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.
When 2 stages are desired, cut W3 at the W2 wire nut, strip and
reconnect per the thermostat kit instruction. (See Fig. 13.) When 3 stages
are desired, cut the W2 wire nut off and discard. Strip W2, W3, and E
and reconnect per thermostat kit instructions. (See Fig. 13.)
NOTE:
When 3 stages are used or anytime the E terminal is not tied to
W2, the emergency heat relay, part of outdoor kit Part No.
KHAOT0201SEC must be used.
A09387
Fig. 13 – Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with 2 Outdoor Thermostats)
A09388
Fig. 14 – Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat for Manufactured Housing)
A05182
Fig. 15 – Transformer Connections
R
G
W
Y
THERMOSTAT
RED
GRY
WHT
BLU
VIO
BRN
WHT
R
G
W
2
W
3
E
C
FAN COIL
C
Y
AIR COND.
R
G
W
Y
THERMOSTAT
R
G
W
2
W
3
E
C
FAN COIL
C
Y
AIR COND.
RED
GRY
WHT
WHT
BLU
VIO
BRN
R
G
C
E
L
O
Y
THERMOSTAT
R
R
C
O
Y
G
C
W
2
W
2
W
2
W
3
E
FAN COIL
HEAT PUMP
(CONTROL)
RED
GRY
BRN
WHT
BLU
VIO
R
G
C
E
L
O
Y
THERMOSTAT
R
R
C
O
Y
G
C
W
2
W
2
W
2
W
3
E
ODTS
FAN COIL
HEAT PUMP
(CONTROL)
RED
GRY
BRN
WHT
VIO
BLU
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 used normally with kit Part No.
KHAOT0301FST.
R
G
C
L
E
O
C
1
4
7
C
9
6
3
Y
THERMOSTAT
R
R
C
O
Y
G
C
W
2
W
2
W
2
W
3
E
FAN COIL
EMERGENCY HEAT RELAY
HEAT PUMP
(CONTROL)
ODTS1
ODTS2
RED
GRY
BRN
WHT
BLU
VIO
R
E
W
2
R
C
THERMOSTAT
FAN COIL
HEAT PUMP
(CONTROL)
G
C
W
2
E
L
G
C
R
O
Y
ODTS
O
Y
W
3
W
2
230
C
208
BRN
RED
YEL
BLK
SECONDARY
PRIMARY
