Filter Cleaning - Lennox MCFA User Manual

Filters are accessed through the re turn air grille as shown
in the illustration which fol lows.
Typical Filter Removal
M22A, M33A or M33B Ceiling-Mounted Cassettes
Lift filter up and out to remove
it from the unit.

Filter Cleaning

The filter may be cleaned using either a
vacuum cleaner or with clean water.
Vacuum
cleaner
Filter
The filter should be held with
the air entering side face down
when using clean water to wash
the filter.
Filter should be set aside to air
dry after cleaning. Do not
place filter in direct sunlight
or use any type of heat to dry
the filter.
NOTE - If filter is extremely
dirty, it may be necessary to
tergent for cleaning. Filter must
be thoroughly rinsed and dried.
Figure 5. Typical Filter Removal and Cleaning
Simultaneously press two
latch relese buttons (M33A or M33B)
or slide grille release latches toward
the middle as shown (M22A)
Pivot hinged grille downward
Filter should be held
with the air entering side
face up when using a
vacuum cleaner.
Spigot or
water hose
Filter
Preparing Unit for Prolonged Idle Periods
The unit must be prepared before lengthy periods of
inactivity:
• Set the controller so the indoor unit operates in the fan
only mode for 8 to 12 hours.
• Thoroughly clean and replace return air filters.
• Use a clean, dry cloth to wipe cabinets.
• Turn the unit OFF at the wired controller or wireless re-
mote control; then, disconnect power to the unit.
• Remove batteries from the wireless remote control.
Returning the Unit to Operation after Pro longed
Idle Periods
If the unit has been inactive for an extended period of time,
it must be prepared for operation:
• Properly clean and replace return air filters.
• Use a clean, dry cloth to wipe unit front panels.
• Insert batteries into the wireless remote control.
• If power was disconnected, reconnect power to the
unit for at least 12 hours before returning the unit to
operation.
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