Indoor Unit Diagrams; Mwma And Mwmb Indoor Unit; M22A Indoor Unit - Lennox MPA009S4S Service Manual

12. Indoor Unit Diagrams

12.1. MWMA and MWMB Indoor Unit

1 2 3

12.2. M22A Indoor Unit

Motor
M
Figure 33. M22A009S4-1P, M22A012S4-1P and M22A018S4-1P Unit Wiring Diagram
Figure 32. MWMA and MWMB Unit Wiring Diagram
TO WIRE
CONTROLLER
DISPLA Y
5 B OA RD
CN10A
P5
CN15
M
2
CN13
PUMP
2
CN5
WATER LEVEL SWITCH
OPTIONAL
Wire Contoller
Alarm
Remote
Output
Control
5
JR6
10
ON - OFF
ALARM
CN10
CN23
JR6
CN33
INDOOR UNIT
MAINBOARD
CN3
CN1 CN110
E Y X
1 2 3
To CCM
Comm.Bus
TO OUTDOOR UNIT
68
M
M
5
CN10A
8 CN3(CN301)
5
DISPLAY BOARD
5
Note1:remove the JR6 jumper for
remote on/off control
INDOOR COIL TEMP. SENSOR
4
CN6
BLACK
ROOM TEMP.SENSOR
WHITE
P1
Y/G
CN501
Contoller
CN403
X Y E
To CCM
Comm.Bus
T2
T1