Lennox LGH094U Unit Information page 85

LGH092/102/120H STAGED SUPPLY AIR, WITH BYPASS, BELT DRIVE BLOWER
24 VAC POWER
A55
T43
L14
L30
RSV
T43
GND
R
DI 4
GND
24 VAC COMMON
GND
R S T
U
3
NOTE - IF ANY WIRE IN THIS APPLIANCE IS REPLACED
IT MUST BE REPLACED WITH WIRE OF LIKE SIZE,
RATING, TERMINATION AND INSULATION THICKNESS.
DISCONNECT ALL POWER BEFORE SERVICING!
S5
K1
K10 K68
2
G
WV G
ONLY IN UNITS WITH HUMIDITROL OR
PHASE AND VOLTAGE DETECTION OPTION
EXTERNAL HUMIDITROL CONTACTS
S49 AND S50 ARE PART OF 5VDC CIRCUIT
J268-1,-3 AND J268-2,-4 ARE CONNECTED ON UNITS
WITHOUT HUMIDITROL OR PHASE DETECTION OPTIONS
B10 IS NOT USED ON UNITS WITH ERV
USED ON UNITS WITH ERV SINGLE POINT POWER.
SEE ERV DIAGRAM
K65 IS CONTROLLED BY A1 ONLY IN TARGET ALC APPLICATIONS
USED ON LCH AND UNITS WITH ERV SINGLE POINT POWER 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 AMPACITY AND MAXIMUM
OVERCURRENT PROTECTION SIZE.
20V
FB
COM
RELAY
(IDB)PWM 1/VO
COM
(ODF)PWM 3
(ODF)PWM 2
2
5
SD
PC
STF
C
S8
B
K2
K65
1
7
4
C1
C C
NC NC
Page 85
COMPONENT
KEY
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
B10 MOTOR, EXHAUST FAN
CAPACITOR, OUTDOOR FAN 1
C1
CAPACITOR, OUTDOOR FAN 2
C2
CAPACITOR, EXHAUST FAN
C6
CIRCUIT, BREAKER, T1
CB8
CIRCUIT BREAKER, MAIN DISCONNECT, UNIT
CB10
CIRCUIT BREAKER, TRANSFORMER T43
CB31
FUSE, UNIT
F4
FUSE, OUTDOOR FAN MOTOR
F10
2
FUSE, SCCR OPTION UNIT
F61
1
HEATER, COMPRESSOR 1
HR1
HEATER, COMPRESSOR 2
HR2
JACK, GFI RECEPTICLE
J11
7
K1,−1 CONTACTOR, COMPRESSOR 1
6 K2,−1 CONTACTOR, COMPRESSOR 2
K3, −1 CONTACTOR, BLOWER
K10,−1,2 RELAY, OUTDOOR FAN 1
9
K65−1,2 RELAY, EXHAUST FAN
K68,−1,2 RELAY, OUTDOOR FAN 2
4
K202,−1 CONTACTOR, POWER TO MOTOR
K203,−2 RELAY, INVERTER START/RUN
VALVE SOLENOID, REHEAT COIL 1
L14
RESISTOR, VFD LOADING, A96
R55
SENSOR, OUTSIDE AIR TEMPERATURE
RT17
SWITCH, LIMIT HI PRESS COMP 1
S4
SWITCH, LIMIT HI TEMP COMPRESSOR 1
S5
SWITCH, LIMIT HI PRESS COMPRESS 2
S7
SWITCH, LIMIT HI TEMP COMPRESSOR 2
S8
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP
S11
SWITCH, DISCONNECT
S48
SWITCH, FREEZESTAT COMP 1
S49
SWITCH, FREEZESTAT COMP 2
S50
SWITCH, LOW PRESS, LOW AMBIENT KIT COMP
S84
SWITCH, LOW PRESS, COMPRESSOR 1
S87
SWITCH, LOW PRESS, COMPRESSOR 2
S88
TRANSFORMER, CONTROL
T1
TRANSFORMER, REHEAT
T43
TERMINAL STRIP, UNIT
TB2
24 VAC COMMON
7
7 9
4
4 6
C2
WIRING DIAGRAM
COOLING -MSAV WITH BYPASS
LCH/LGH - 092H,102H,120H - G,J,M,Y
SECTION B
Supersedes New Form No.
537627-03
07/18
REV 0
537627-04