Preparations Before Installation; For Bottom Intake; Installing The Duct - Panasonic S-22MU1E5 Instrucciones De Instalación

3-18. Preparations Before Installation

(1) Confirm the positional relationship between the unit and
suspension bolts. (Fig. 3-56)
● Install the inspection opening on the control box side where
maintenance and inspection of the control box and drain
pump are easy. Install the inspection opening also in the
lower part of the unit.
Air discharge
Air intake
Ceiling
A
(Inspection access)
700
Allow view A
Inspection access
(Field supply)
Unit: mm
Fig. 3-56
(2) Make sure the range of the unit's external static pressure is
not exceeded.
(See the technical documentation for the range of the
external static pressure setting.)
(3) Open the installation hole. (Pre-set ceilings)
● Once the installation hole is opened in the ceiling where the
unit is to be installed, pass refrigerant piping, drain piping,
transmission wiring, and remote controller wiring (It is not
necessary if using a wireless remote controller) to the unit's
piping and wiring holes.
See "5. HOW TO PROCESS TUBING", "3-22. Installing the
Drain Pipe" and "4. ELECTRICAL WIRING".
● After opening the ceiling hole, make sure ceiling is level if
needed. It might be necessary to reinforce the ceiling frame
to prevent shaking.
Consult an architect or carpenter for details.

3-19. For Bottom Intake

For bottom intake, replace the chamber lid and protection net in
the procedure shown in the diagram.
(1) Remove the frame filter assy.
Remove the chamber lid. (Fig. 3-57-1)
Air intake
Frame
Filter Assy
Chamber lid
Air discharge
Dummy hole
Fig. 3-57-1
(2) Refer to the diagram to attach the chamber lid and frame
filter assy in the direction of the arrow. (Fig. 3-57-2)
Note: Attach the lid with the dummy holes downward.
Dummy hole
Chamber lid
Frame
Filter Assy
Air discharge
Air intake
Fig. 3-57-2
(3) Attach the frame filter assy (supplied) in the manner shown
in the diagram. (Fig. 3-57-3)
Main unit
Attach the Frame Filter Assy to
the main unit while pushing the tip
of the latches in the direction of
the arrow.
Frame Filter Assy
In case of bottom side In case of back side
Fig. 3-57-3
23

3-20. Installing the Duct

Connect the duct supplied in the field as shown in Fig. 3-58.
Flange
Flange
(Field supply)
Connection screw (x10)
Insulation material
Main unit
Rectangular solid duct (Field supply)
(Field supply)
Air inlet side Air outlet side
Fig. 3-58
Air inlet side
• Attach the duct and intake-side fl ange (fi eld supply).
• Connect the fl ange to the main unit with 10 - ø3.1 (Hole)
screws.
• Wrap the intake-side fl ange and duct connection area with
aluminum tape or something similar to prevent air escaping.
CAUTION
When attaching a duct to the intake-side, be sure to attach
an air filter inside the air passage on the intake-side. (Use
an air filter whose dust collecting efficiency is at least 50%
in a gravimetric technique.)
The included filter is not used when the intake duct is
attached.
Air outlet side
• Connect the duct according to the air outside of the
outlet-side fl ange.
• Wrap the outlet-side fl ange and the duct connection
area with aluminum tape or something similar to
prevent air escaping.
CAUTION
●
Be sure to insulate the duct to prevent condensation from
forming. (Material: glass wool or polyethylene foam, 25 mm thick)
●
Use electric insulation between the duct and the wall when
using metal ducts to pass metal laths of the net or fence
shape or metal plating into wooden buildings.
● Be sure to explain about the way of maintaining and cleaning
local procurements (air filter, grille [both air outlet and suction
grille], etc.) to your customer.
3-21. Suspending the Indoor Unit
Depending on the ceiling type:
• Insert suspension bolts as shown in the diagram. (Fig. 3-59)
or
• Use existing ceiling supports or construct a suitable
support as shown in the diagram. (Fig. 3-60)
Hole-in-anchor
Hole-in-plug Concrete Insert
Suspension bolt (M10 or 3/8")
(field supply)
Fig. 3-59
Ceiling tiles
Ceiling support
Fig. 3-60
WARNING
It is important that you use extreme care in supporting
the indoor unit inside the ceiling. Ensure that the ceiling
is strong enough to support the weight of the unit. Before
hanging the unit, test the strength of each attached
suspension bolt.
(1) When placing the unit inside the ceiling, determine the pitch
of the suspension bolts referring to the dimensional data as
shown in Fig. 3-54.
Tubing must be laid and connected inside the ceiling when
suspending the unit. If the ceiling is already constructed,
lay the tubing into position for connection to the unit before
placing the unit inside the ceiling.
(2) Screw in the suspension bolts allowing them to protrude
from the ceiling as shown in Fig. 3-59. (Cut the ceiling
material, if necessary.)
(3) Thread the 3 hexagonal nuts and 2 washers (field supply)
onto each of the 4 suspension bolts as shown in Fig. 3-61
and 3-62. Use 1 nut and 1 washer for the upper part, and 2
nuts and 1 washer for the lower part, so that the unit will not
fall off the suspension lugs.
Suspension bolt
Suspension lug
Nuts and washers
(use for upper and lower)
Notch
Double nuts
Fig. 3-61
Suspension bolt
Hexagonal nut
Double nuts
Fig. 3-62
(4) Adjust the height of the unit.
(5) Check the unit is horizontally level.
CAUTION
● Make sure the unit is installed level using a level or a vinyl
hose filled with water. In using a vinyl hose instead of a
level, adjust the top surface of the unit to the surface of
the water at both ends of the vinyl hose and adjust the unit
horizontally. (One thing to watch out for in particular is if the
unit is installed so that the slope is not in the direction of the
drain piping, this might cause leaking.) (Fig. 3-63)
Level
Vinyl hose
Fig. 3-63
(6) Tighten the upper nut.
24