Wiring Guide - Lennox MMA018SM4 Service Manual

36-60K Wiring Diagram
WIRING DIAGRAM
NOTE1:
1.The parts with dotted line indicates CODE PART NAME
optional features.
ECM
2.Remove the short connector of JR1
when you use the "on-off" function. T1
3.Remove the short connector of J1
T2
when you use the "WATER LEVEL
T2A
SWITCH" function.
T2B
4. This symbol indicates the element
is optional, the actual shape shall prevail.
UVLED
OUTPUT
CN46
CN43
Output:24VAC Output:5VDC
Output:12VDC
Output:5VDC
WATER LEVEL
SWITCH
DRY CONTACT
ALARM
DRY CONTACT
WORK
CN18
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 FOR SETTING POWER(DC MOTOR MODEL ONLY MOTOR MODEL ONLY) )
0 0 0 0 0 0
ENC1 ENC1
8 8 8 8 8 8
CODE CODE 4 4 7 7
5 5
CAPACITY CAPACITY
≤ ≤ 53 53 54~71 54~71 72~90 72~90
FACTORY FACTORY ACCORDING TO RELATED MODEL.
ACCORDING TO RELATED MODEL.
SETTING SETTING

3.6. Wiring Guide

Systems
Indoor to Outdoor Wiring
(Communication/Power)
1, 2, 3 and GND
Outdoor to Main Power
L1, L2 and GND
Indoor to Outdoor Wiring
(Communication/Power)
1, 2, 3 and GND
Outdoor to Main Power
L1, L2 and GND
Indoor to Outdoor Wiring
(Power only)
L1, L2 and GND
Indoor to Outdoor Wiring
(Communication only) (S1, S2 and GND)
Outdoor to Main Power
L1, L2 and GND
Indoor to Outdoor Wiring
(Power only)
L1, L2 and GND
INDOOR ECM MOTOR
ROOM TEMP.SENSOR
COIL TEMP.SENSOR
INDOOR COIL INLET TEMP.SENSOR
INDOOR COIL OUTLET TEMP.SENSOR
ECM
M
2
3
4(3)
CN6
CN29
Output:5VDC Output:5VDC Output:24VAC
Output:15VDC
INDOOR UNIT
J1
MAINBOARD
L and N :230VAC
CN20
N L
S1 S2
CN11
2
COMMUNICATION
TO OUTDOOR UNIT
0 0 0 0 0 0 0 0
8 8 8 8 8 8 8 8
8 8 9 9 B B
A A
91~105 91~105 106~140 141~160 141~160 ≥ ≥ 161 161
106~140
Table 1. Single Zone Mini-Split Wiring Guide
System
Capacity
18K
18K
24K
24K
36K
36K
48K
48K
24V THERMOSTATS SETTING 24V THERMOSTATS SETTING
ON ON
0 0
S3 S3 SW1 SW1
1 1 2 2 3 3
8 8
CODE CODE 0~F 0~F ON~OFF ON~OFF
FACTORY FACTORY
SETTING SETTING
FOR SETTING NETADDRESS FOR SETTING NETADDRESS
0 0
ON ON
S1+S2 S1+S2
1 1 2 2
8 8
CODE CODE 0~F 0~F
0~15 0~15
NETADDRESS NETADDRESS
3
FACTORY FACTORY
SETTING SETTING
CN12
6
RED
TRANS RED
BLUE
RED
2
2
L1 L2
TO OUTDOOR UNIT
OR POWER
16023000
Number of
System Voltage
Conductors
208/230 VAC 4
208/230 VAC 3
208/230 VAC 4
208/230 VAC 3
208/230 VAC 3
208/230 VAC 3
208/230 VAC 3
208/230 VAC 3
20
ON ON ON ON ON ON
SW3 SW3 SW4 SW4
SW2 SW2
4 4 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 0 0 ON ON 0 0 ON ON
1 1 2 2 1 1 2 2
8 8 1 1 2 2 8 8 8 8
0~F 0~F 0~F 0~F 0~F 0~F
16~31 16~31 32~47 32~47 48~63 48~63
Remote
Control
ON/OFF
CN7 CN14
CN2
Output:+12VDC
Output:+15VDC
JR1
CN11
CN6 CN9 CN10
24V THERMOSTAT
A74403
Wire Type
16AWG*4 Stranded,
Stranded
Stranded
16AWG*4 Stranded,
Stranded
Stranded
16AWG*3 Stranded,
Stranded
Stranded (shielded)
Stranded
16AWG*3 Stranded,
Stranded
ON ON
S4 S4
4 4
1 1 2 2
ON~OFF ON~OFF
4
Output:+5VDC
CN3
E Y X
To CCM
Comm.Bus
Wire Gauge
unshielded
MCA: 18A
14AWG*3
unshielded
MCA: 20A
12AWG*3
unshielded
24AWG*3
MCA: 30A
10AWG*3
unshielded