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7 SEGMENT LED
FLAME SENSE
DIAGNOSTIC
PUSH BUTTON
DIP SWITCHES
OUTDOOR AIR
SENSOR
TERMINALS
DISCHARGE AIR
SENSOR
TERMINALS
TB83
NOT USED
TB84
NOT USED
TB82, future use
I+ = DATA HIGH CONNECTION
I - = DATA LOW CONNECTION
TB83 (not used)
R = 24VAC
I + = DATA HIGH CONNECTION
I - = DATA LOW CONNECTION
C = 24VAXC COMMON
TB84 (not used)
R = 24VAC
I + = DATA HIGH CONNECTION
I - = DATA LOW CONNECTION
C = 24VAXC COMMON
1/4" QUICK CONNECT TERMINALS
HUM = UNPOWERED NORMALLY OPEN (DRY) CONTACTS
XMFR = 120 VAC OUTPUT TO TRANSFORMER
LI = 120 VAC INPUT TO CONTROL
ACC = 120 VAC OUTPUT TO OPTIONAL ACCESSORY
NEUTRALS = 120 VAC NEUTRAL
31-5000734 Rev. 0
HUM
LINE 1
R I + I - C R I + I - C
W1 W2 G Y2 Y1 C
C R DH L O DS
24V TERMINALS
THERMOSTAT CONNECTIONS (TB1)
DS = DEHUMIDIFICATION SIGNAL
W2 = HEAT DEMAND FROM 2ND STAGE THERMOSTAT
W1 = HEAT DEMAND FROM 1ST STAGE THERMOSTAT
R = CLASS 2 VOLTAGE TO THERMOSTAT
G = MANUAL FAN FROM THERMOSTAT
C = THERMOSTAT SIGNAL GROUND CONNECTED TO
TRANSFORMER GRD (TR) & CHASSIS GROUND (GRD)
Y1 = THERMOSTAT 1ST STAGE COOL SIGNAL
Y2 = THERMOSTAT 2ND STAGE COOL SIGNAL
O = THERMOSTAT SIGNAL TO HEAT PUMP
REVERSING VALVE
DH = NOT USED
L = NOT USED
Figure 4.
Page 9
ACC
HS/ CAI
NEUTRAL
INDOOR
BLOWER
CONNECTOR
12 PIN LOW
VOLTAGE
CONNECTOR
W915 Y1 TO Y2
2 STAGE COMPR
W951 R TO O
HEAT PUMP
W914 R TO DS
DEHUM
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