M33A And M33B Indoor Unit - Lennox MPA009S4S Service Manual

12.3. M33A and M33B Indoor Unit

TO PROGRAMMABLE
WIRED CONTROLLER
Note: The programmable
wired controller and regular
wired controller use the same
wiring connector.
M
Motor
Reactor
Figure 35. M33A036S4-*P, M33A048S4-*P and M33B048S4-*P Unit Wiring Diagram
TO WIRED
CONTROLLER
4
2
CN 40
P5
5
CN1 5
M
2
CN13
PU MP
2
CN5
WATER LEVEL SWITCH
NOTE:
COMPONENT IN DASH
LINE IS OPTIONAL
OR FIELD WIRING.
Figure 34. M33A024S4-*P Unit Wiring Diagram
M
5
FAN
Note1:remove the JR6 jumper for
remote on/off control
Remote JR6
Control
Alarm
Output
Alarm
Remote
Output
Control
5
2
D IS P LA Y
B O A R D
JR6
10
ON - OFF
CN 10 A ALA RM
CN 10
CN23
CN3 3
INDOOR UNIT
MAINBOARD
CN3
CN1 C N 110
E Y X
1 2 3
To LVM
Comm.Bus
TO OUTDOOR UNIT
CN15
JR6
CN10(CN10A)
INDOOR UNIT
MAINBOARD
CN2
CN3
Q E P
E Y X
S1
S2
To CCM
Comm.Bus
To OUTDOOR
Comm.Bus
69
Note1: Remove the JR6 jumper
for remote on /off contr ol
JR6
INDOOR COIL TEMP.SENSOR
4
CN6
BL AC K
ROO M T EMP .SEN SOR
WH ITE
P1
Y/G
2 M
CN13
PUMP
5
10
DISPLAY
BOARD
CN7
INDOOR COIL OUTLET TEMP.SENSOR
CN6
4
INDOOR COIL TEMP.SENSOR
BLACK
CN5 ROOM TEMP.SENSOR
WHITE
P1
CN1
P4
WATER LEVEL SWITCH
Y/G
Y/G
L1 L2
POWER
T2
T1
TO WIRE
CONTROLLE R
T2B
T2
T1