Lennox CBX25UHV Series Installation And Service Procedure page 19

Figure 28. Install both Horizontal and Main Drain Pan
Brackets (-042 through -060)
6. Remove two screws securing the blow-off prevention
bracket. Rotate the brackets 180º and reinstall using
the same screws. See figure 29.
HORIZONTAL LEFT-HAND
AIR DISCHARGE
(FACTORY DEFAULT)
HORIZONTAL RIGHT-HAND
AIR DISCHARGE
NOTE - BLOW-OFF PREVENTION BRACKET. IS NOT REQUIRED ON 1.5-
AND 2-TON (-018 AND -024) UNITS.
Figure 29. Blow-Off Prevention Plate
REMOVE BRACKETS
SECURING BOTH
DRAIN PANS TO
UNIT.
REMOVE 2 SCREWS
SECURING BLOW OFF
PREVENTION BRACKET
ROTATE BRACKET TO THIS
POSITION AND REINSTALL
Page 19
C-Condensate Drain
IMPORTANT
On units of this type, where the blower "draws" rather than
"blows" air through the coil, traps must be installed in the
condensate drain lines (primary and auxiliary, if used).
Traps prevent the blower from drawing air through the
drain lines into the air supply.
IMPORTANT
A field-fabricated secondary drain pan, with a drain pipe
to the outside of the building, is required in all installations
over a finished living space or in any area that may be
damaged by overflow from the main drain pan. In some
localities, local codes may require a secondary drain pan
for any horizontal installation.
The air handler is provided with ¾" NPT condensate drain
connections.
SLOPING THE UNIT TOWARD THE DRAIN
Make sure the unit is sloped (similar to the slope shown in
figure 30) (horizontal or upflow) so that the drain pan will
empty completely without water standing in the pan.
THIS CORNER SHOULD BE 5/8" (+/- 1/8") HIGHER
THAN DRAIN CORNER
DRAIN CORNER
Figure 30. Sloping the Drain
THIS CORNER SHOULD BE
5/8" (+/- 1/8") HIGHER THAN
DRAIN CORNER