Mitsubishi Electric PAAA18AA1 Installation Manual page 65

Vertical mounting:
When mounted vertically, the air handler's primary drain connection is located in the center of the unit. The
slightly higher drain to the left is the secondary drain. Attach the drain connector and properly tighten with
sealant and install the drain line.
CAUTION
Over-tightening the drain connection could result in drain pan breakage and failure.
The secondary connection is for the overflow switch (provided in the accessories bag).
This device will shut the cooling operation down in the event of a primary drain line
blockage. See wiring section for connecting this device.
Horizontal mounting (left or right):
If the unit is installed horizontally, remove the knockout in the front panel to gain access to the side drain
pan connections. Attach the connector as described above and route drain line. Any vertical drain pan
openings must be covered to eliminate air loss which will decrease the capacity of the unit.
CAUTION
Over-tightening the drain connection could result in drain pan breakage and failure. The
secondary connection is for the overflow switch (provided in the accessories bag). This
device will shut the cooling operation down in the event of a primary drain line blockage.
See wiring section for connecting this device.
Specifications are subject to change without notice.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
t
2""Mln.
+
t
2"Min. i
65
t
2" Min.
i
Anti-syphon
air vent
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