Fresh air and exhaust control – Friedrich KM18 User Manual
Page 7
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920-198-01
Figure 7
Care and Maintenance / Fresh air and exhaust control
To remove, wash and replace filter and return air grille
Open the return air (RA) grille by grasping it at the top outside edges and
pulling towards you (See Figure 7). The RA grille will stay open until it is
detached or closed (it is easier to completely detach the grille before closing
it). To remove the RA grille, grasp it at the bottom and pull towards you.
The
¿lter is held in place by two spring clips (See Figure 7). Push down on
the clips, grasp the
¿lter and pull towards you to remove it for cleaning. Clean
with warm water and a mild detergent, rinse, dry completely and replace.
Use caution when removing the
¿lter. The coil surface can be sharp.
If the RA grille has been removed, pick up the grille by supporting it from
both sides near the bottom (See Figure 8, Note 1). Lift return air grille and
insert the grille's tabs into the bottom slots of the discharge air plenum (See
Figure 8, Note 2). Snap the grille into place by pushing the grille up and onto
the unit's latches at the bottom (See Figure 8, Notes 3 and 4).
Fresh air and exhaust control
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TO BRING IN FRESH AIR - Move the lever to the Fresh Air position which
allows outside air to enter the room. This is useful in fall and spring as a
means of bringing in fresh outside air when using Fan Only. It can also be
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control in the middle or closed position.
TO EXHAUST INDOOR AIR - Move the lever to the Exhaust position. This
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DISCHARGE AIR PLENUM
SLOT
TAB
SLOT
TAB
NOTE 2
RETURN AIR GRILLE
NOTE 1
LATCHES
NOTE 3
NOTE 1
RETURN AIR GRILLE
NOTE 4
SIDE VIEW
LATCH
NOTE 3
Figure 8
Figure 9