Lennox MPA012S4S-1P Installation Instructions Manual page 12

REFRIGERANT
PIPING CONNECTIONS
HANGER
CONDENSATE
DRAIN
CONNECTION
d
LOUVER SWING
MOTORS
Figure 10. Install Cover Panel
4. Position the ceiling panel so that the arrow on the
panel is aligned with the arrow sticker on the cassette
base (both arrow stickers should be on the same side
of the cassette base).
NOTE: If the panel and the base are not properly aligned,
the airflow will be blocked and the harness plugs
from the panel to the cassette base will not be long
enough to plug together.
5. Place the cover panel hangers on the two corners with
the louver swing motors. Place these two hangers
on the corresponding hooks on the corners of the
cassette base. See detail A in "Figure 10. Install Cover
Panel". Then, place the other hangers from the other
two corners over their corresponding hooks on the
cassette base as shown in detail B in "Figure 10.
Install Cover Panel".
6. Connect the six-pin harness plugs from each of the
two swing motors to the matching six-pin plugs from
the control box in the cassette base.
7. Connect the black harness from the display on the
cover panel to the corresponding black plug from the
control box in the cassette base.
8. Connect the black two-pin plug from the temperature
sensor to the corresponding black plug from the
control box in the cassette base.
9. Tighten the provided screws in the bracket in the cover
panel immediately below each panel hanger. See
detail C in "Figure 10. Install Cover Panel". Adjust the
cover panel by turning slightly clockwise, if necessary,
CASSETTE BASE
PANEL
HOOK
DETAIL A
DETAIL B
DETAIL C
COVER PANEL
SECURING
SCREW
PHILLIPS
COVER PANEL
SCREWDRIVER
to make sure that the panel is properly aligned with the
cassette base.
⅜"
THREADED
ROD
LEVELING
NUT
CEILING
COVER PANEL
Side View Cutaway
CASSETTE BASE
CEILING
FOAM
INSULATION
COVER PANEL
Figure 11. Cover Panel in Place
11. Continue to tighten the cover panel securing screws
until the insulation between the cover panel and the
cassette base has been compressed to approximately
¼" (6 mm). The cover panel must form a seal with
the ceiling and the cassette base around the entire
perimeter of the unit.
Figure 12. Adjust Unit Height through Corner Panel
12. If it is necessary to adjust the cassette height after the
cover panel has been installed, access the leveling nut
through the removable access cover on each corner.
13. The return air grille must be reinstalled on the cover
panel. Align the four tabs on the grille with the four
slots in the cover panel. Tilt the panel back into place.
Press the opposite side of the cover gently until the
latches engage.
12
≥7/8 (22 mm)
1-7/8 (48 mm)
CASSETTE
UNIT BASE
FOAM
INSULATION
SUPPLY AIR
air out
LOUVER
LOOSEN UPPER NUT
CORNER PANEL
TIGHTEN LOWER NUT