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1
2
2
P UNITS − 208/230V 1PH 60 HZ
PRIMARY
LIMIT
PRESSURE
SWITCH
G
Y1
L1
FUSED OR CIRCUIT BREAKER
DISCONNECT (Furnished by
installer)
THERMOSTAT
C
GND
GAS
VALVE
FLAME ROLLOUT
SWITCH
W1
DOOR
INTERLOCK
PRIMARY
LIMIT
PRESSURE
SWITCH
DOOR
INTERLOCK
GAS
VALVE
FLAME ROLLOUT
SWITCH
K3 CONTACTOR
T1 TRANSFORMER
24v: blue − yellow
208v: red − black
240v: orange − black
TB1
R
W2
Y2
G
Y1
C
W1
R
W2
Y2
ECONOMIZER
RELAY
TB34
L1
ECON
L2
L3
T3T2
T1
L1
L2
L3
31 2 4
J84
7
K105
BLUE
YELLOW
BLACK
7
5
RELAY
K109
BLOWER MOTOR
CONTROL BOX
TERMINAL STRIP
TERMINAL STRIP
MAKE−UP BOX
MAKE−UP BOX
L1
L3
PLUG
BLOWER DECK
BLUE
YELLOW
RED
RED
RED
RED
(Alternate make−up
box left side)
(Alternate make−up
box right side)
SEE NOTE 1
NOTES :
1 − Relay K109 can be used
for an accessory rated at the
same voltage as power sup-
ply.
REMOVE JUMPER IN
TWO-STAGE MODE
L3L2
L2
RED
Y UNITS − 208/230V 3PH 60HZ
G24-200 FIELD WIRING DIAGRAM
2 − Field installed and supplied re-
sistor (R3), is required in two-stage
applications when using electro-
mechanical thermostat.
(Use a 150 ohm, 10 watt resistor −
Lennox part number P−8−6256.)
R3
See Note 2
COMBUSTION
AIR BLOWER
COMBUSTION
AIR BLOWER
IGNITION
CONTROL
BOARD
IGNITION
CONTROL
BOARD
Three phase shown.
This lead not used in
single phase applications
Three phase shown. L2 not used
in single phase applications
Three phase shown. L2 not used
in single phase applications
GROUND
LUG
RED
RED
ORANGE
FACTORY INSTALLED
LINE VOLTAGE FIELD INSTALLED
24 VOLTS FIELD INSTALLED
FIELD-INSTALLED DRIVE KIT COMPONENT
FIGURE 16