Lennox LGM120U User Manual

Page 51
IX-Wiring Diagrams and Sequence of Operation
GAS HEAT FOR LGM092/150 UNITS
Y and G Voltage
RED RED
1
2
DRNWR
PNK
Form No:
Voltage: 208/240/3/60(Y),460/3/60(G)
Model: LGM Series RTU − Gas Heat
130k, 180k, 240k BtuH
Rev:1
BLK
BLU
BLU
COM HI M
123456 78910
1 2345 678
123456
1234 12
13
PNK
2
132
7
1234
1
P229
2
P229
3
4
P229
5
6
P229
4
6
BLU
1
2
3
DRNWR
1
P19
2
LTVH−1LTVH−2
1
P228
2
P228
WHT WHT
BRN
BLK
GRY
BLU
RED
BRN
WHT
RED
WHT−RED
RED
RED
WHT−RED WHT−RED
WHT
WHT
BLU
WHT
WHT
RED
GRY
WHT
WHT
BRN
WHT
RED
GRY
WB−001
WB−007
PNK
BRN
538149−01
SEC
A
HTG
CLG
SEC
B
WI RI NG DI AGRAM FLOW
SEC
B3
CLG
SEC
C
ACCS
SEC
D
ACCS
A
J413
P413
GB
MODBUS
P411
J411
AGB
MODBUS−1
J374
P374
L1−LINE LOW 1 LOW 2 HIGH
FLAME SENS SPARK
1
MODBUS
CABLE
LOW TEMPERATURE
VESTIBULE HEATER,
BURNER 1
LOW TEMP VEST HTR
BURNER 1
1
1
FROM F10 T1 LOAD,
B−SECT LOC FF09
FROM F10 T2 LOAD,
B−SECT FF09
J412 P412
A
G
B
MODBUS−2
MODBUS CABLE
DENOTES OPTIONAL COMPONENTS AND WIRING
A3
DSI CTRL 1
GND GND HEAT2 24VAC GND HEAT1 GND
A55
J393
P393
24VAC GND
MAIN CTRL
MGV
P406
J406
COM
R1 W1 W2 R2
P425
D1
MGV1 MGV2
J408
P408
GV−M GV−COM GV−HI S47 S47
P425
S10 S10 S21 S21
J407
P407
S18 S18
J410
P410

Lennox LGM120U Specifications

General

Brand	Lennox
Model	LGM120U
Category	Air Conditioner
Language	English