INTEGRATED CONTROL
COMBUSTION
AIR INDUCER
CONNECTOR
DIAGNOSTIC
PUSH BUTTON_
DIP SWITCHES "_
OUTDOOR AIR_
SENSOR _..
TERMINALS
(Future Use)
DISCHARGE AIR _
SENSOR
TERMINALS
(Future Use)
FACTORY TEST
HEADER PINS.
FACTORY USE ONLY.
7-SEGMENT
DIAGNOSTIC LED
NEUTRAL
TERMINALS
IGNITOR
CONNECTOR
LINE VOLTAGE
TERMINALS
INDOOR
BLOWER
CONNECTOR
ON-BOARD
LINKS
1/4"QUICK CONNECT TERMINALS
HUM : 120 VAC OUTPUT TO HUMIDIFIER
XMFR = 120 VAC OUTPUT TO TRANSFORMER
LI = 120 VAC INPUT TO CONTROL
CIRC = 120 VAC OUTPUT TO CIRCULATING BLOWER
EAC = 120 VAC OUTPUT TO ELECTRONIC AIR CLEANER
NEUTRALS=120 VAC NEUTRAL
THERMOSTAT CONNECTIONS (TB1)
DS: DEHUMIDIFICATION SIGNAL
W2= HEAT DEMANDFROM 2ND STAGE T'STAT
Wl= HEAT DEMANDFROM IST STAGE T'STAT
R= CLASS 2 VOLTAGE TO THERMOSTAT
G= MANUAL FAN FROM T'STAT
C= THERMOSTATSIGNAL GROUNDCONNECTEDTO TRANSFORMER
GROUND (TR) & CHASIS GROUND (GRD)
YI: THERMOSTAT Ist STAGE COOL SIGNAL
Y2: THERMOSTAT 2rid STAGE COOL SIGNAL
O: THERMOSTAT SIGNAL TO HEAT PUMP REVERSING VALVE
H= 24V HUMIDIFIER OUTPUT
L= LENNOX SYSTEM OPERATION MONITOR
FIGURE 42
Page 33
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