Instruction manual

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. 12.)
HEATER STAGING
CAUTION: If W2, W3, and E on any 3 sequence heater (18, 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. 10.) 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. 11.)
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. 11—Wiring Layout Heat Pump Unit (Cooling and 2-Stage Heat with 2 Outdoor Thermostats)
A94062
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
(CONTROL)
EMERGENCY HEAT RELAY
HEAT PUMP
(CONTROL)
ODTS1
ODTS2
Fig. 12—Transformer Connections
A94067
2 3 0
C
2 0 8
BRN
RED
YEL
BLK
SECONDARY
PRIMARY
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