Indoor Unit Connection Points For Centralized; Controller; Dry Mode Operation - Indoor Units; Procedure - Lennox MHA Series Service Manual

Mini-split systems
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FOR SETTING ADDRESS
S1+S2
RANGE
ADDRESS
DIP SWITCH
HANDLES
FACTORY SETTING
Indoor Unit Address is 0
Both dip switch handles are DOWN, dial points to 0.
Switch location and color varies for each indoor unit. Two examples are shown above.
6.2.
Indoor Unit Connection Points for
Centralized Controller
Mini-split indoor units can be connected to a centralized
controller (e.g. Lennox VRF Manager - LVM or Trane Tracer)
or a BACnet or LonWorks gateway using the XYE terminals
on the indoor unit main board.
Figure 13. Indoor Unit Connection Points
(Typical Wiring Diagram)
0
ON
1 2
8
0 ~ F
0 ~ 15
LEFT - DOWN
RIGHT - DOWN
Figure 11. Dip Switches
Figure 12. Dip Switch Settings
(E)
X
Y
Y/G
To CCM
Comm.Bus
0
0
ON
1 2
8
8
0 ~ F
16 ~ 31
32 ~ 47
LEFT - DOWN
LEFT - UP
RIGHT - UP
RIGHT - DOWN
Dip switch 1 is UP and dip switch 2 is DOWN, dial points to 0.
Figure 14. Typical Indoor Unit Connection Points
6.3.

Dry Mode Operation - Indoor Units

6.3.1.

Procedure

1. Press the MODE button to select DRY mode.
2. P ress the UP/ DOWN button to select the desired
temperature. The temperature setting range is from 62°F
to 86°F in one degree increments.
NOTE:
The blower is preset at a low speed and cannot be
changed therefore it will get cold and most likely
will over shoot the temperature setting by 6-10
degrees depending on the room size or other
various factors. Also the Follow Me mode does
12
0
ON
1 2
8
0 ~ F
0 ~ F
48 ~ 63
LEFT - UP
RIGHT - UP
Indoor Unit Address is 32
ON
1 2

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