Maintenance; Electrical Hazard - Lennox MCFA User Manual

Louver Adjustment
IMPORTANT
DO NOT adjust the louvers by hand. Louvers are
adjustable only by using the wired controller or wireless
remote control.
M22A, M33A or M33B Ceiling-Mounted Cassettes
Use the wired or wireless remote control to set the position
of the discharge air louvers. The louvers may be set to
automatically swing. The horizontal louvers will swing
outward to downward. You may also set the louvers so
that they are stationary in a single position. It is always
recom mended to direct the horizontal discharge air louvers
downward during heating and outward dur ing cooling.
Heating operation
Adjust louvers downward.
Figure 2. Ceiling Mount Cassettes
MCFA or MCFB Ceiling- or Floor-Mounted Units
Use the wired or wireless remote control to set the position
of the discharge air louvers. The louvers may be set to
automatically swing. In this setting, horizontal louvers will
swing outward to downward and vertical louvers can be
manually adjusted from left to right.
You may also set the louvers so that they are stationary in
a single position. It is always recom mended to direct the
horizontal discharge air louvers downward during heating
and outward dur ing cooling.
Horizontal Auto-Swing Operation
Sets louvers to pivot up and down automatically.
Cooling operation
Set horizontal louvers outward.
Figure 3. Ceiling or Floor Mounted Units
Cooling operation
Adjust louvers outward.
Vertical louvers can be manually
adjusted left to right.
Heating operation
Set horizontal louvers downward.
MWMA, MWMB or 3WMB Wall-Mounted Units
Use the wired controller or the wireless remote control to
set the position of the discharge air louvers. The louvers
may be set to automatically swing between the outward
and downward positions, OR you may set the louvers so
that they are stationary in a single position. It is always
recommended to direct the ho rizontal discharge air louvers
downward during heating and outward during cooling.
Auto-swing operation
Sets louvers to pivot up and down automatically.
Heating operation
Set horizontal louvers downward.
Figure 4. Wall Mounted Units

Maintenance

WARNING
ELECTRICAL SHOCK,
HAZARD.
Before performing any maintenance, power to unit must
be off at the unit disconnect switch.
IMPORTANT
Use a clean, dry cloth to wipe the wireless remote con-
trol. Never use a damp or wet cloth to clean the wireless
remote control.
Use a clean, dry cloth to wipe the indoor unit. If
necessary, dampened cloth may be used.
Do not use a chemically treated dust cloth on either the
indoor unit or wireless remote control.
Do not use benzene, paint thinner, polishing powder
or similar products to clean the indoor unit or control.
These substances may cause the plastic surface to
crack or become dam aged.
Return Air Filters
Blocked or dirty return air filters affect system oper ation
and efficiency. Air filters should be checked monthly in
order to ensure proper air flow to the in door unit. It may be
necessary to check the filter more frequently if the unit is
installed in an area with a large amount of dust.
The filter may be removed and cleaned, or it should be
replaced with a filter of like kind and size if it is impossible
to clean the filter. See "Figure 1. Parts Arrangement" on
page 2 to locate the filter in your indoor unit.
3
Cooling operation
Set horizontal louvers outward.
FIRE, OR EXPLOSION