Lennox MMA018SM4 Service Manual page 21

Systems
Indoor to Outdoor Wiring
(Communication only)
(S1, S2 and GND)
Outdoor to Main Power
L1, L2 and GND
System and Terminal
System Capacity
Designations
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
Outdoor to Main Power
L1, L2 and GND
Outdoor to Main Power
L1, L2 and GND
Outdoor to Main Power
L1, L2 and GND
Outdoor to Main Power
L1, L2 and GND
MCA = Minimum Circuit Amps
Table 1. Single Zone Mini-Split Wiring Guide
System
System Voltage
Capacity
60K
60K
Table 2. Multi-Zone Installation Wiring Requirements
System Voltage
Indoor to Outdoor Unit
18K 208/230VAC
18K 208/230VAC
24K 208/230VAC
Multi-Zone Outdoor Unit to Main Power
18K 208/230VAC
24K 208/230VAC
30K 208/230VAC
36K 208/230VAC
48K 208/230VAC
Number of
Conductors
208/230 VAC 3
208/230 VAC 3
Number of
Conductors
4
3
4
3
3
3
3
3
21
Wire Type Wire Gauge
Stranded (shielded) 24AWG*3
MCA: 35A
Stranded
Wire Type Wire Gauge / MCA
Stranded and
unshielded
Stranded and
14AWG / 18A
unshielded
Stranded and
unshielded
Stranded and
14AWG / 18A
unshielded
Stranded and
12AWG / 22A
unshielded
Stranded and
unshielded
Stranded and
10AWG / 30A
unshielded
Stranded and
unshielded
8AWG*3
16AWG
16AWG
16AWG
8AWG / 35A