Lennox CBX25UH Series Installation And Service Procedure page 11

HORIZONTAL APPLICATION
IMPORTANT
When removing the coil, there is possible danger of
equipment damage and personal injury. Be careful when
removing the coil assembly from a unit installed in right-
or left-hand applications. The coil may tip into the drain
pan once it is clear of the cabinet. Support the coil when
removing it.
ANGLE IRON OR SHEET
METAL
MAXIMUM 1/2"
LONG SCREW
AIR FLOW
FRONT VIEW
Figure 16. Suspending Horizontal Unit
NOTE — When the unit is installed in horizontal
applications, a secondary drain pan is recommended.
Refer to local codes.
NOTE — This unit may be installed in left-hand or
right-hand air discharge horizontal applications. Adequate
support must be provided to ensure cabinet integrity.
Ensure that there is adequate room to remove service and
access panels if installing in the horizontal position.
LEFT-HAND DISCHARGE
1. Determine which plugs are required for drain line
connections.
2. With access door removed, remove drain line plugs to
install drain lines.
3. Set unit so that it is sloped toward the drain pan end of
the unit (see figure 25).
4. The horizontal configuration is shown in figure 17.
AIR FLOW
PLUGS
Figure 17. Left‐Hand Discharge Configuration
ELECTRICAL INLET CLEAR­
ANCE 4 IN. (102 MM)
END VIEW
Drains
LEFT‐HAND DRAINS
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5. If the unit is suspended, the entire length of the cabinet
must be supported. If you use a chain or strap, use a
piece of angle iron or sheet metal attached to the unit
(either above or below) to support the length of the
cabinet. Use securing screws no longer than 1/2 inch
to avoid damaging the coil or filter. See figure 16. Use
sheet metal screws to connect the return and supply air
plenums as required.
RIGHT-HAND AIR DISCHARGE
For horizontal right-hand air discharge, the following field
modifications are required.
1. Remove and set aside blower and coil access covers.
2. Remove brackets securing pan to unit. See figure 18.
Figure 18. Remove Main Drain Pan Mounting
Brackets
3. Remove coil assembly, bottom drain pan and
horizontal drain pan as one unit from the air handler.