Lennox SLP99UHV Series Unit Information page 22

COMBUSTION
AIR INDUCER
CONNECTOR
FLAME
SENSE
DIAGNOSTIC
PUSH BUTTON
DIP SWITCHES
OUTDOOR AIR
SENSOR
TERMINALS
DISCHARGE AIR
SENSOR
TERMINALS
FACTORY TEST
HEADER PINS.
FACTORY USE ONLY.
TB83 OUTDOOR
TB84 INDOOR
RS-BUS LINK (TB82, future use)
I+ = DATA HIGH CONNECTION
I - = DATA LOW CONNECTION
RS-BUS OUTDOOR (TB83)
R = 24VAC
I + = DATA HIGH CONNECTION
I - = DATA LOW CONNECTION
C = 24VAXC COMMON
RS-BUS INDOOR (TB84)
R = 24VAC
I + = DATA HIGH CONNECTION
I - = DATA LOW CONNECTION
C = 24VAXC COMMON
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 ELECTRICAL AIR CLEANER
NEUTRALS = 120 VAC NEUTRAL
7-SEGMENT
DIAGNOSTIC LED
THERMOSTAT CONNECTIONS (TB1)
DS = DEHUMIDIFICATION SIGNAL
W2 = HEAT DEMAND FROM 2ND STAGE T/STAT
W1 = HEAT DEMAND FROM 1ST STAGE T/STAT
R = CLASS 2 VOLTAGE TO THERMOSTAT
G = MANUAL FAN FROM T'STAT
C = THERMOSTAT SIGNAL GROUND CONNECTED TO
TRANSFORMER GRD (TR) & CHASIS GROUND (GRD)
Y1 = THERMOSTAT 1ST STAGE COOL SIGNAL
Y2 = THERMOSTAT 2ND STAGE COOL SIGNAL
O = THERMOSTAT SIGNAL TO HEAT PUMP
H = 24V HUMIDIFIER OUTPUT. DO NOT CONNECT TO
THERMOSTAT AND A NON-COMMUNICATING
FIGURE 4
Page 22
NEUTRAL
TERMINALS
IGNITOR
CONNECTOR
LINE VOLTAGE
TERMINALS
HUM
EAC
INDOOR
BLOWER
CONNECTOR
W915 Y1 TO Y2
W915
W951
W914
communicating T'stat and
non-communicating outdoor
REVERSING VALVE
®
COMFORTSENSE
L = USE ONLY WITH A COMMUNICATING
OUTDOOR UNIT
DH = DEHUMIDIFICATION OUTPUT
COMMUNICATING THERMOSTAT ONLY
ON-BOARD
LINKS
W951 R TO O
W914 R TO DS
L - use only with
unit.
THERMOSTAT