Page 6
LGH036-360 Agency
Typical Gas Heat Schematic
New Form No.
Supersedes
WIRING DIAGRAM
GAS HEAT, 130, 180 AND 240
07/18
HEATING
SECTION A
REV. 0
537705-03
537705-04
KEY
DESCRIPTION
A3
CONTROL, BURNER 1
A55
CONTROL, MAIN BOARD LENNOX
B6
MOTOR COMBUSTION AIR BLOWER
C3
CAPACITOR, COMB AIR BLOWER 1
E1
SPARK
FS1
SENSOR FLAME
GV1
VALVE GAS 1
HR6
HEATER, -50C LOW AMBIENT KIT
J15
JACK, BURNER 1
J19
JACK, COMBUSTION AIR BLOWER 1
J135
JACK, PRIMARY LIMIT
J228
JACK, VESTIBULE HEATER
J229
JACK, VESTIBULE HEATER CONTROL 1
J265C
JACK, CONTACTOR RELAY
J266A
JACK, HEATING CONTROL STG 1
J271A,B JACK, HEATING SENSORS STG 1
K13,-1
RELAY, COMBUSTION AIR BLOWER
K123, -1 RELAY, SINGLE THROW LIMIT
K125,-1 RELAY, HEAT SHUT OFF
P15
PLUG, BURNER 1
P19
PLUG, COMBUSTION AIR BLOWER 1
P135
PLUG, PRIMARY LIMIT
P228
PLUG, VESTIBULE HEATER
P229
PLUG, VESTIBULE HEATER CONTROL 1
P265
PLUG, CONTACTOR RELAY
P266
PLUG, HEATING CONTROL
P271
PLUG, HEATING SENSORS STG 1
S10
SWITCH, LIMIT PRIMARY GAS
S18
SWITCH, COMBUSTION AIR BLOWER PROOF
S47
SWITCH FLAME ROLLOUT BURNER
S59
TSTAT, OPEN -20F, CLOSE 10F
S60
TSTAT, OPEN 20F, CLOSE -10F
S61
TSTAT, OPEN 50F, CLOSE 20F
T3
TRANSFORMER COMB AIR BWR 1
S60
S61
S59 (1)
CAB
(24 VAC)
S10-C
S10-NC
S10-NO
S21-C
S21-NC
H1
S47
S47
S18
S18
GV1
A8,
K15
W2,
K16
1
2
3
4
5
6
7
8
9
10
2
3
1
K13
P265
J265D
9
COMM
P266
J266A
B
P271 J271
A55
FROM F10
F10 USED ON UNITS WITH SCCR OPTION
F10
FUSE, OUTDOOR FAN MOTOR
T3 NOT CONNECTED TO F10 ON 575V SCCR UNITS
