Lennox MMA018SM4 Service Manual page 23

208/230V Outdoor Unit
Terminal Block
208/230V Indoor Unit
208/230V Indoor Unit
L2 1(A) 2(A) 3(A) 1(B) 2(B) 3(B)
1(C) 2(C) 3(C) 1(D) 2(D) 3(D) 1(E) 2(E) 3(E)
Terminal Block
Terminal Block
1 2 3
1 2 3
From Power
Suppl y
Indoor Unit E
To Indoor Unit A
To Indoor Unit B
Indoor Unit D
To Indoor Unit C
Outdoor Unit
Figure 11. Multi-Zone Wiring
Indoor Unit
CommunicationTerminal Block
208/230V Outdoor Unit 208/230V Outdoor Unit
Power Terminal Block Power Terminal Block
E Y X Q E P
S1 S2
Y
L1 L2
L1 L2
208/230V Indoor Unit
Power Terminal Block
L1 L2
From Power
Suppl y
Outdoor Unit
Communication Terminal Block
S1 S2
Indoor Unit
Outdoor Unit
Figure 12. Communication - Single-Zone Wiring 36K - 60K Only
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