Lennox MLA Series Installation & User's Instructions page 15

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
THIS UNIT SUPPORTS THE
PROGRAMMABLE WIRED CONTROL ONLY.
FACTORY INSTALLED
Optional
4
Programmable
Wired Controller
For Setting Auto-Restart For Setting Auto-Restart
ON ON
SW1 SW1
1 1
ACTIVE ACTIVE
Mode Mode INACTIVE INACTIVE
Factory Factory
Setting Setting
For Setting Down louver For Setting Down louver
ON ON
SW101 SW101
1 1
ACTIVE ACTIVE
Mode Mode INACTIVE INACTIVE
Factory Factory
Setting Setting
Table 7. Single Zone Installation Wiring Requirements
System Voltage
12K 208/230VAC
12K 208/230VAC
Adapter
board
ON ON
1 1
For temp. Compensation For temp. Compensation
ON ON
ON ON
ON ON
SW102 SW102
1 1
1 1 2 2
1 1 2 2
0 2
Mode Mode
Factory Factory
Setting Setting
Figure 22. MFMA012-S4-2P Unit Wiring Diagram
Number of
Conductors
4
3
For Setting Fan Motor Control then No Power Request For Setting Fan Motor Control then No Power Request
ON ON
ON ON
ON ON
SW103 SW103
1 1 2 2
1 1 2 2
1 1 2 2
-2
Mode Mode
4 FAN OFF LOW
FAN S P EED
Factory Factory
Setting Setting
15
Wire Type
Stranded and
unshielded
Stranded and
unshielded
M
FAN
ON ON
ON ON
ON ON
This symbol indicates the
1 1 2 2 1 1 2 2
1 1 2 2
element is optional,the actual
SET TING
TER MAL
shape shall prevail.
FAN SPE ED
Wire Gauge / MCA
16AWG
16AWG / 9A