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G24−200 FIELD WIRING DIAGRAM
PRIMARY
LIMIT
PRESSURE
SWITCH
G
Y1
L1
FUSED OR
CIRCUIT BREAKER
DISCONNECT
(Furnished by
installer)
THERMOSTAT
C
GND
GAS
VALVE
W1
DOOR
INTERLOCK
PRIMARY
LIMIT
PRESSURE
SWITCH
DOOR
INTERLOCK
GAS
VALVE
FLAME ROLLOUT
SWITCH
K3 CONTACTOR
T3 TRANSFORMER
460v: white − red
230v: white − black
T1 TRANSFORMER
24v: blue − yellow
460v: black − black
R
W2
Y2
G
Y1
C
W1
R
W2
Y2
ECONOMIZER
RELAY
TB34
4
L1
ECON
L2
L3
T3T2
T1
L1
L2
L3
31 2 4
K13
J84
T13 TRANSFORMER
460v: white − red
230v: white − black
7
K105
BLUE
YELLOW
BLACK
7
5
RELAY
K109
BLOWER MOTOR
CONTROL BOX
RELAY
TB1 TERMINAL STRIP
TERMINAL STRIP
MAKE−UP BOX
MAKE-UP BOX
L1
L2
PLUG
BLOWER DECK
BLUE
YELLOW
BLACK
RED
RED
BLUE
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 supply.
REMOVE JUMPER IN
TWO-STAGE MODE
BLACK
BLACK
BLUE
RED
RED
L1 L2
L3
G UNITS − 460V 3PH 60HZ
J UNITS − 575V 3PH 60HZ
L3
2 − Field installed and supplied
resistor (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
GROUND
LUG
RED
RED
RED
RED
WHITE
WHITE
BLACK
BLACK
FACTORY INSTALLED
LINE VOLTAGE FIELD INSTALLED
24 VOLTS FIELD INSTALLED
FIELD-INSTALLED DRIVE KIT COMPONENT
FIGURE 17