Lennox LGH094U Unit Information page 88

LGH092-152U STAGED SUPPLY AIR, WITH BYPASS, BELT DRIVE BLOWER
24 VAC POWER
P268 P268
J268 J268
T43
L41
L42
T43
T43
J268
P268
T1
24 VAC COMMON
J268
P268
TB13
TB2
F4/F61
S48
J246
P246
R S T
CB10
P249
J11
3
B3
A55
S49
S50
A55
RT17
S87
S11
S4
S5 S8
P265
A55
P265
J265C
J265A
A A
P265
K1 K2
1
B
B B
A A
A A
J265A
B B
P265
B B
J265A
J265C
P265
P265
G
WVU
G
7
B1
1
HR1
T5 USED ON G & J VOLTAGE ONLY
USED ON 094U, 122U, 152U UNITS ONLY
S49 AND S50 ARE PART OF 5VDC CIRCUIT
OPTIONAL
K65 CONTROLLED BY A1, IN TARGET ALC APPLICATIONS ONLY
DO7 USED ON UNITS WITH HUMIDITROL TO POWER
EXHAUST FANS. DO6 PROVIDES POWER TO K65 ON
UNITS WITH NO HUMIDITROL
NOTE: FOR USE WITH COPPER CONDUCTORS ONLY.
REFER TO UNIT RATING PLATE FOR MINIMUM CIRCUIT
A55
20V
FB
COM
RELAY
(IDB)PWM 1/VO
COM
(ODF)PWM 3
(ODF)PWM 2
2
B21
B5
5
SD
B4
6
4
PC
STF
9
C
B
A55
PSI
+5V
A96
A55
GND
DO6 TSI
P265
J265E
A
A55
K65
B
P298D
J265E
P265 P298
F10
7
B2
1
J86
P86
B4
(ULTRA) LCH/LGH - 092U, 094U, 120U, 122U, 152U -
Y, G, J, M
Supersedes
Page 88
KEY COMPONENT
PANEL, AUTOMATED LOGIC CONTROL (ALC)
A1
PANEL, MAIN
A55
A96 CONTROL INVERTER
B1 COMPRESSOR 1
B2 COMPRESSOR 2
MOTOR, BLOWER
B3
MOTOR, OUTDOOR FAN 1
B4
MOTOR, OUTDOOR FAN 2
B5
MOTOR, EXHAUST FAN
B10
MOTOR, OUTDOOR FAN 3
B21
CAPACITOR, EXHAUST FAN
C6
CIRCUIT, BREAKER
CB8
CIRCUIT BREAKER, MAIN DISCONNECT, UNIT
CB10
2
CB31 CIRCUIT BREAKER, TRANSFORMER T43
FUSE, UNIT
F4
F10 FUSE, OUTDOOR FAN MOTOR
1
FUSE, T5 TRANSFORMER PRIMARY
F57
FUSE, UNIT SCCR OPTION
F61
HEATER, COMPRESSOR 1
HR1
7
HEATER, COMPRESSOR 2
HR2
J11 JACK, GFI RECEPTICLE
K1,−1 CONTACTOR, COMPRESSOR 1
A
K2,−1 CONTACTOR, COMPRESSOR 2
K3, −1 CONTACTOR, BLOWER
RELAY, OUTDOOR FAN 1
K191−1
B
K65−1,2 RELAY, EXHAUST FAN
K194−1 RELAY, OUTDOOR FAN 2
K202,−1 CONTACTOR, POWER TO MOTOR
K203,−1,2 RELAY, INVERTER START/RUN
A185
TXV VALVE SOLENOID,
L41
TXV VALVE SOLENOID,
L42
VO
RESISTOR, VFD LOADING, A96
R55
VCC
SENSOR, OUTSIDE AIR TEMPERATURE
RT17
SWITCH, LIMIT HI PRESS COMP 1
GND S4
S5 SWITCH, LIMIT HI TEMP COMPRESSOR 1
SWITCH, LIMIT HI TEMP COMPRESSOR 2
S8
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP
S11
RT37
S48 SWITCH, DISCONNECT
TSI
SWITCH, FREEZESTAT COMP 1
S49
S50 SWITCH, FREEZESTAT COMP 2
SWITCH, LOW PRESS, COMPRESSOR 1
S87
GND
TRANSFORMER, CONTROL
T1
TRANSFORMER,
T5
RT38
TRANSFORMER, REHEAT
T43
TERMINAL STRIP, UNIT
TB2
TERMINAL STRIP, POWER DISTRIBUTION
TB13
24 VAC COMMON
GND
F57 F57
T5
7 9
4 6
J18
P18
C6
J132
P132
B10
J87
J88
P87 P88
B5
B21
WIRING DIAGRAM
COOLING -MSAV WITH BYPASS
SECTION B
New Form No.
537617-03 537617-04
02/19
REV 1