TRANSFORMER INFORMATION
Transformer is factory wired for 230-v operation. For 208-v applications, disconnect the black wire from the 230-v terminal on the transformer
and connect it to the 208-v terminal. (See Fig. 13.)
HEATER STAGING
CAUTION: 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 KHAOT0201SEC and is normally
used with kit KHAOT0301FST for 2 outdoor thermostat system.
The controls are factory-circuited for single-stage operation. For 2-stage operation, use outdoor thermostat kit KHAOT0301FST, and for 3-stage
use both kits 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. 11.) 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. 12.)
NOTE:
When 3 stages are used or anytime the E terminal is not tied to W2, the emergency heat relay, part of outdoor thermostat kit
KHAOT0201SEC must be used.
Fig. 10—Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with No Outdoor Thermostat)
A94060
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
(CONTROL)
HEAT PUMP
(CONTROL)
RED
GRY
BRN
WHT
BLU
VIO
Fig. 8—Wiring Layout Air Conditioning Unit
(Cooling Only)
A94058
R
G
W
Y
THERMOSTAT
RED
GRY
WHT
BLU
VIO
BRN
WHT
R
G
W
2
W
3
E
C
FAN COIL
(CONTROL)
C
Y
AIR COND.
Fig. 11—Wiring Layout Heat Pump Unit
(Cooling and 2-Stage Heat with 1 Outdoor Thermostat)
A94061
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
(CONTROL)
HEAT PUMP
(CONTROL)
RED
GRY
BRN
WHT
VIO
BLU
Fig. 9—Wiring Layout Air Conditioning Unit
(Cooling and 1-Stage Heat)
A94059
R
G
W
Y
THERMOSTAT
R
G
W
2
W
3
E
C
FAN COIL
(CONTROL)
C
Y
AIR COND.
RED
GRY
WHT
WHT
BLU
VIO
BRN
—7—
