Honeywell Prestige IAQ THX9000 System Installation Manual page 4

2-wire Prestige® IAQ and RF EIM
Wiring guide
Typical hookup of heat pump system with up to four-stage heat and two-stage cool with single
transformer.
POWER
HEAT
COOL
STATUS
LEDS
1
2
3
69-2445EFS—03
FAN
U1
U2
U3
SENSORS
SEE WIRING GUIDE—EQUIPMENT SECTION FOR IAQ EQUIPMENT WIRING.
WIRE AT MAXIMUM OF TWO SENSORS USING THE S1, S1, S2, S2
TERMINALS.
L TERMINAL SENDS CONTINUOUS OUTPUT WHEN THERMOSTAT IS SET TO
EM. HEAT MODE.
TO THERMOSTAT
HEAT PUMP
O/B
AUX1
AUX2
3
1
4
O/B
CHANGEOVER VALVE
BACKUP HEAT
STAGE 1
AUX1
BACKUP HEAT
AUX2
STAGE 2
COMPRESSOR
Y
(STAGE 1)
COMPRESSOR
Y2
(STAGE 2)
G
FAN RELAY
L
COMPRESSOR
MONITOR OR
ZONE PANEL
JUMPERS
AIR HANDLER
TRANSFORMER
R
24
C
VAC VAC
RETURN AIR SENSOR
2
DISHARGE AIR SENSOR
INDOOR SENSOR
OUTDOOR SENSOR
RETURN AIR SENSOR
DISHARGE AIR SENSOR
INDOOR SENSOR
2
OUTDOOR SENSOR
120
M32391