Lennox MMDB Service Manual

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To Indoor Unit C
L2
1(A) 3(A) 2(A)
208/230V Outdoor Unit
Terminal Block
From Power
Supply
Outdoor Unit
Indoor Unit E
1(B) 3(B) 2(B)
1(C) 3(C) 2(C)
1(D) 3(D) 2(D)
1(E) 3(E) 2(E)
Terminal Block
1 2 3
208/230V Indoor Unit
Indoor Unit D
Terminal Block
1 2 3
208/230V Indoor Unit
To Indoor Unit A
To Indoor Unit B
Figure 19. Multi-Zone Wiring
From Power
Supply
Indoor Unit
CommunicationTerminal Block
L1 L2
Power Terminal Block
208/230V Outdoor Unit
L1 L2
L1 L2
Power Terminal Block
208/230V Outdoor Unit
Power Terminal Block
208/230V Indoor Unit
S1 S2
Communication Terminal Block
Outdoor Unit
E Y X
Y
Q
S1
E P
S2
Outdoor Unit
Indoor Unit
Figure 20. Communication - Single-Zone Wiring 36K and 48K Only

Lennox MMDB Specifications

General

Brand	Lennox
Model	MMDB
Category	Air Conditioner
Language	English