Other; 2-Way Cassette Type (L1 Type) (For 22, 28, 36, 45, 56 Types); Before Installing The Ceiling Panel; Installing The Ceiling Panel - Panasonic S-28MD1E5 Instructions D'installation

(7) Fit the supplied screws into the holes at the panel center
(2 locations, front and rear), and tighten them. As shown
in the Fig. 7-6, open the screw cover at the center of the
discharge outlet, then insert and tighten the screw, and
again close the cover.
Indoor unit
Ceiling panel
Fig. 7-5
Screw 4×35
Washer-head screw
Screw
Screw
cover
4×35
Fig. 7-6
(8) Verify that the panel is tightly attached to the ceiling.
● At this time, make sure there is no gap between the indoor
unit and the ceiling panel, or between the ceiling panel and
the ceiling surface. (Fig. 7-7)
Must be no gap.
Indoor unit
Ceiling surface Ceiling panel
Fig. 7-7
● If there is a gap between the panel and the ceiling surface,
leave the panel attached and make fine adjustments to the
installation height of the indoor unit to eliminate the gap with
the ceiling surface. (Fig. 7-8)
Insert a spanner or other general tool through
the side panel installation hole and make fine
adjustments to the indoor unit nuts.
Fig. 7-8
CAUTION
● If the screws are not fully ● If there is a gap between
tightened, problems such the ceiling surface and the
as those shown below may ceiling panel even when the
occur. Be sure to tighten the screws are fully tightened,
screws securely. readjust the height of the
indoor unit.
SUPPLEMENT
Air leakage
Ceiling panel
air leakage
Stains
Adjust so that there is no gap.
Condensation and water leakage
For small adjustments that do not affect the levelness of the indoor
unit, drain piping or other key elements, the unit height can be
adjusted through the ceiling side panel installation holes without
removing the ceiling panel.
7-1-4. Wiring the ceiling panel
(1) Remove the cover from the electrical component box.
(Fig. 7-9)
Electrical component box cover
Fig. 7-9
(2) Fasten the wiring connector (7P, red) that emerges from
the ceiling panel using the lead wire clamps on the indoor
unit side (2 locations). Then connect it to the connector in
the indoor unit electrical component box. (Fig. 7-10)
* Fasten with the indoor unit lead wire clamps (2 locations).
Ceiling panel lead wire
Ceiling panel connector
Indoor unit connector
Fig. 7-10
● If the connector is not connected, the automatic flap will not
operate. Connect the connector securely.
● Verify that the wiring connector is not pinched between the
electrical component box and the cover.
● Verify that the wiring connector is not pinched between the
indoor unit and the ceiling panel.
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7-1-5. Installing the side panel and intake grille
A. Installing the side panel
(1) Slide the side panel in the direction of the arrow to install it.
(Fig. 7-11)
Fasten with screws (4 × 12)
Tabs (supplied)
Tabs
Slide
Slide the side panel so that the side panel tabs are fastened to the
ceiling panel. Then fasten in place with the supplied screws (4 × 12).
Fig. 7-11
(2) Use the supplied screws (4 × 12) to attach the side panel
to the ceiling panel.
B. Installing the intake grille
● To install the intake grille, follow the steps for removing the
intake grille in the reverse order.
● When installing the intake grille, take care that the flap lead
wire does not become pinched. (Fig. 7-12)
Fig. 7-12

7-2. Other

A. Check after installation
● Verify again that there is no gap between the indoor unit and
the ceiling panel, or between the ceiling panel and the ceiling
surface.
*If a gap is present, water leakage and condensation may
occur.
● Verify that the wiring connections are secure.
*If the wiring is not connected, the automatic flap will
not operate. (Alarm P09 will be displayed at the remote
controller.) In addition, water leakage and condensation may
occur.
B. Units with wireless remote controllers
● For details of the installation procedure, refer to the
installation instructions that was supplied with the optional
wireless remote controller with receiver embedded in the
indoor unit.
■ 2-Way Cassette Type (L1 Type)
(For 22, 28, 36, 45, 56 Types)

7-3. Before Installing the Ceiling Panel

(1) Be sure to create a ceiling opening with the dimensions
shown in Fig. 3-19.
(2) Use the suspension bolts to adjust the height of the indoor
unit so that the distance between the bottom of the indoor
unit or optional filter chamber and the ceiling surface is
60 – 65 mm. (Fig. 7-13)
Adjusting the indoor unit height
Fig. 7-13
CAUTION
Never touch or attempt to move the air-direction louver by
hand or you may damage the unit. Instead, use the remote
controller if you want to change the direction of air flow.

7-4. Installing the Ceiling Panel

(1) Open the air intake panel and air filter.
[1] Push in. (2) Slide. (3) Pull. ( (4) Remove.)
Safety string
(4)
2
1 3
Air-intake panel
Fig. 7-14
N OTE
If you wish to remove the air-intake panel, remove the strings
attached to the air-intake panel.
The air-intake panel is removed from the ceiling panel.
Be sure to reattach the string to the air-intake panel when
returning to the original position.
[2] Removing the air filter
Press the hook by hand to remove the air filter.
(Fig. 7-15)
Installing the Ceiling Panel
Indoor unit
Safety lid
Electrical component box
Ceiling panel
Detailed view of
filter fasteners
M5 × 40 screw, 4 pcs.
Safety
string
Detailed view of hook
Air filter
Detailed view of
Safety string
middle hook
Air-intake panel
Safety string
Fig. 7-15
38