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G24−200 FIELD WIRING DIAGRAM (120V SINGLE PH 60HZ)
PRIMARY
LIMIT
PRESSURE
SWITCH
G
Y1
IGNITION
CONTROL
BOARD
L1 N
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
See Note 3
T1 TRANSFORMER
24v: blue − yellow
120v: black − white
R
W2
Y2
G
Y1
C
W1
R
W2
Y2
ECONOMIZER
RELAY
TB34
4
L1
ECON
L2
L3
T3T2
T1
L1
L3
31 2 4
K13
J84
T13 TRANSFORMER
See Note 3
7
K105
BLUE
YELLOW
BLACK
7
5
RELAY
K109
BLOWER MOTOR
CONTROL BOX
RELAY
TB1 TERMINAL STRIP
TERMINAL STRIP
MAKE−UP BOX
L1
L3
PLUG
BLOWER DECK
BLUE
YELLOW
RED
RED
BLUE
BLACK
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 supply.
REMOVE FACTORY-
INSTALLED JUMPER IN
TWO-STAGE MODE
WHITE
BLUE
2 − Field installed and supplied resistor (R3), is required in two-stage applications when using electro-mechanical thermo-
stat. (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
GROUND
LUG
MAKE-UP BOX
RED
WHITE
RED
BLACK
WHITE
FACTORY INSTALLED
LINE VOLTAGE FIELD INSTALLED
24 VOLTS FIELD INSTALLED
FIELD-INSTALLED DRIVE KIT COMPONENT
3 − The T3 and T13 transformers (54G5201) are marked as follows: 230v between white and black leads and 460v between
white and red leads. However, in this application, each transformer has been used to supply 230v (available between the
white and red leads) to an induce draft blower when 115v is applied between the white and black leads of each transformer.
FIGURE 15