52S
SERIES
14
2. Clean by vacuuming or washing. To reinstall the
filter, fit it into the basepan, making sure the 
notch in the filter fits around the thermostat cap-
illary. The filter media is plastic framed for ad-
ditional support. Take care not to rip the media 
when cleaning. Additional filters are available in 
multi-packs.
3. Flex the filter, and fit it under the discharge deck.
OUTDOOR VENT FILTER
■  
OUTDOOR VENT FILTER
 (Figure 22) should be 
cleaned in the same manner as the air inlet filter, but 
only once during a cooling or heating season. Remove 
chassis from sleeve to access vent filter. Dirty filters 
restrict airflow, which can reduce major component 
life.
EXTERNAL PARTS
■  
EXTERNAL PARTS
  include the polymer sleeve and 
grilles. The sleeve manufacturer recommends cleaning 
the surface, including the grilles, with household 
detergent and water.
INTERNAL PARTS
■  
INTERNAL PARTS 
should be cleaned at least once 
each year.
■  
DISCONNECT POWER TO UNIT:
CORD-CONNECTED UNITS
1. REMOTE CONTROL UNITS — Set switch on 
wall mounted thermostat to OFF.
ALL OTHER UNITS — Push OFF button on unit 
control panel.
2. Disconnect power at main power supply.
3. Unplug the unit service cord.
HARDWIRED UNITS
1. REMOTE CONTROL UNITS — Set switch on 
wall mounted thermostat to OFF.
ALL OTHER UNITS — Push OFF button on unit 
control panel.
2. Disconnect power at main power supply. Tag dis-
connect to ensure no one restores power to the 
unit. If front panel has not been removed, remove 
panel as shown in Figure 2. Remove access cover 
on side of unit chassis. Pull out plug assembly and 
disconnect (see Figure 23).
Before cleaning, servicing, performing maintenance 
or removing the chassis from the sleeve, disconnect 
all power to the unit to avoid the possibility of elec-
trical shock and personal injury.
FIGURE 21 — REMOVING FILTER
VENT
FILTER
VENT
DOOR
FIGURE 22 — OUTDOOR VENT FILTER LOCATION
(Left Side of Chassis)
PLUG
ASSEMBLY
CONTROL
BOX
ACCESS
COVER
WIRING
DIAGRAM
FIGURE 23 — DISCONNECTING PLUG
ASSEMBLY ON HARDWIRED UNITS