Electrical Wiring Diagrams - Lennox MMA018SM4 Service Manual

3.5. Electrical Wiring Diagrams

Abbreviation
Y/G
CAP
FAN
ECM
T1
T2A
T2B
T2
18-24K Wiring Diagram
WIRING DIAGRAM
NOTE1:
CODE PART NAME
1.The parts with dotted line indicates
ECM
optional features.
CAP
2.Remove the short connector of JR1
FAN
when you use the "on-off" function.
T1
3.Remove the short connector of J1
T2
when you use the "WATER LEVEL
SWITCH" function. T2A
4. This symbol indicates the element T2B
is optional, the actual shape shall prevail.
UVLED
OUTPUT
CN43
Output:5VDC
Output:24VAC
Output:12VDC
Output:5VDC
WATER LEVEL
SWITCH
DRY CONTACT
ALARM
DRY CONTACT
WORK
Y/G
NOTE2:
1.The other switches should be set as
"Off" state from factory.
2.The specific use of the switches please
reference to the manual of application.
3.The CN5/CN23/CN33 connect to left and right terminals.
FOR SETTING POWER(DC MOTOR MODEL ONLY FOR SETTING POWER(DC MOTOR MODEL ONLY) )
0 0 0 0 0 0
ENC1 ENC1
8 8 8 8 8 8
CODE CODE 4 4 5 5 7 7
CAPACITY CAPACITY
≤ ≤ 53 53 54~71 54~71 72~90 72~90
FACTORY FACTORY ACCORDING TO RELATED MODEL.
ACCORDING TO RELATED MODEL.
SETTING SETTING
Meaning
Yellow - Green Conductor
Indoor Fan Capacitor
Indoor Fan Motor
Indoor Electronically Commutated Motor
Indoor Room Temperature Sensor
Indoor Coil Inlet Temperature Sensor
Indoor Coil Outlet Temperature Sensor
Indoor Coil Temperature Sensor
INDOOR ECM MOTOR
INDOOR FAN CAPACITOR
INDOOR FAN MOTOR
ROOM TEMP.SENSOR
COIL TEMP.SENSOR
INDOOR COIL INLET TEMP.SENSOR
INDOOR COIL OUTLET TEMP.SENSOR
ECM
M
2
3
4(3)
CN46 CN6
CN29
Output:5VDC
Output:5VDC
Output:15VDC
INDOOR UNIT
J1
MAINBOARD
L and N :230VAC
S and N :0-24VDC
N L S
CN11
CN18
0 0 0 0 0 0 0 0
8 8 8 8 8 8 8 8
9 9
8 8 A A B B
91~105 91~105 106~140 106~140 141~160 141~160 ≥ ≥ 161 161
24V THERMOSTATS SETTING 24V THERMOSTATS SETTING
0 0
S3 S3
8 8
CODE CODE 0~F 0~F
FACTORY FACTORY
SETTING SETTING
FOR SETTING NETADDRESS FOR SETTING NETADDRESS
0 0
S1+S2 S1+S2
8 8
CODE CODE 0~F 0~F
0~15 0~15
NETADDRESS NETADDRESS
3
FACTORY FACTORY
SETTING SETTING
CN12
Output:24VAC
6
RED
TRANS RED
BLUE
RED
2
3
2
L1（1） L2（2）S（3）
Y/G
TO OUTDOOR UNIT
19
ON ON ON ON ON ON
SW1 SW1 SW3 SW3
SW2 SW2
1 1 2 2 3 3 4 4 1 1 2 2 3 3 4 4 1 1 2 2 3 3
ON~OFF ON~OFF ON~OFF ON~OFF ON~OFF ON~OFF
0 0
ON ON ON ON 0 0 ON ON
1 1 2 2 1 1 2 2
8 8 1 1 2 2 8 8
0~F 0~F 0~F 0~F
16~31 16~31 32~47 32~47
Remote
Control
Output:+12VDC
ON/OFF
CN2
JR1
CN6 CN9 CN10
24V THERMOSTAT
A74404
16023000
ON ON
ON ON
S4 S4
SW4 SW4
4 4 1 1 2 2 3 3 4 4
1 1 2 2
ON~OFF ON~OFF ON~OFF ON~OFF
0 0 ON ON
1 1 2 2
8 8
0~F 0~F
48~63 48~63
4
CN7 CN14
Output:+12VDC
Output:+15VDC
CN11
Output:+5VDC
CN3
E Y X
To CCM
Comm.Bus