Toshiba RAS-18YAH-A Service Manual Download Page 17

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8-3. Indoor Unit

8-3-1. Installation Place

• A place which provides the spaces around the

indoor unit as shown in the above diagram.

• A place where there is no obstacle near the air inlet

and outlet.

• A place which allows an easy installation of the

piping to the outdoor unit.

• A place which allows the front panel to be opened.

CAUTION

• Direct sunlight to the indoor unit wireless

receiver should be avoided.

• The microprocessor in the indoor unit should

not be too close to r-f noise sources.
(For details, see the owner's manual.)

Remote control

• A place where there are no obstacles such as a

curtain that may block the signal from the indoor
unit.

• Do not install the remote control in a place exposed

to direct sunlight or close to a heating source, such
as a stove.

• Keep the remote control at least 1 m apart from the

nearest TV set or stereo equipment.
(This is necessary to prevent image disturbances or
noise interference.)

• The location of the remote control should be

determined as shown below.

Fig. 8-3-1

8-3-2. Installation Parts

Part with an asterisk (

) is packaged with outdoor unit.

Deodorizing filter x 1

Purifying filter x 1

Name

Owner’s manual

Installation manual

Name of parts (Q'ty)

Part

No.

Name of parts (Q'ty)

Part

No.

Installation plate x 1

Wireless remote control x 1

Remote control holder x 1

Pan head wood screw
Ø3,1 x 16 x 2

Batteries x 2

Mounting screw Ø4x 25 x 8

Drain nipple

x 1

Others

(Top view)

Indoor unit

45˚

Remote
control

Reception
range

: Axial distance

Remote

control

Reception
range

Indoor unit

(Side view)

75˚

8-3-3. Cutting a Hole and Mounting

Installation Plate

Cutting a hole

47mm

100mm

Refrigerant pipe hole
Ø65mm

Indoor unit outline

Hooking
section

Center of pipe hole is located
on the line indicated by the
arrow and 100 mm apart from
the pipe hole center line.

Fig. 8-3-2

When installing the refrigerant pipes from the rear.
Determine the pipe hole position using the installation
plate, and drill the pipe hole Ø65 mm slightly downward.

NOTE

When using the drill to pierce the wall that contains a
metal lath, wire lath or metal plate, be sure to use a
pipe hole brim ring sold separately.

Mounting the installation plate

For installation of the indoor unit, use the paper
pattern on the back.

Fig. 8-3-3

When the installation plate is directly
mounted on the wall

100mm

44mm

or more

40mm

130mm

or more

450mm

Anchor

bolt hole

Refriger

ant pipe hole

Ø65mm

1 Installation plate

Refriger

ant

pipe hole
Ø65mm

Indoor unit

outline

Thread

Weight

100mm

47mm

4mm

40mm

21mm

80mm

or more

1. Securely fit the installation plate onto the wall by

screwing it in the upper and lower parts to hook up
the indoor unit.

2. To mount the installation

plate on a concrete wall with
anchor bolts, utilize the
anchor bolt holes as
illustrated in the above figure.

3. Install the installation plate

horizontally in the wall.

Installation plate
(Keep horizontal direction)

Fig. 8-3-4

CAUTION

Failure to firmly install the unit may result in
personal injury and property damage if the unit falls.

1. Adjust the lateral position of the installation plate

without changing the height, so that each screw hole
in the plate comes in the center of a pillar or stud.

2. Make pilot holes with a bit to prevent the studs

from cracking, and then drive the screws into the
holes and tighten.

CAUTION

When installing the installation plate with
mounting screw, do not use the anchor bolt hole.
Otherwise the unit may fall down and result in
personal injury and property damage.

• In the case of a reinforced concrete wall
(1) In the selected area on the reinforced concrete wall,

bore holes at intervals of 450 mm, and drive
clip anchors or hole in anchors into them.

(2) Attach the installation plate to the wall by

screwing bolts or nuts into the anchors.
However, in the case where hole in
anchors are used, the depth of the
holes should be adjusted so that the nut-
heads extend no more than 15 mm.

Fig. 8-3-5

Anchor
bolt

Projection
15mm
or less

• There may be a wire conduit embedded in the wall.

Confirm on the blue prints or ask the builder.

• Install the installation plate using 4 to 8 pieces of

mounting screw securing four corners with screws.

• Make sure of the proper installation of the

installation plate before mounting the indoor unit.

Concrete wall

Installation
plate

Hole in anchor

Bolt

Hole in anchor

Installation plate

Nut with threaded
hole 8 mm dia.

Less than 15 mm

Fig. 8-3-6

• In the case of the pipe on the back
Using the pattern, position the pipe hole, and bore the
hole slightly downward.

8-3-4. Electrical Work

Important items of indoor unit wiring
1. For electrical works the wiring and cables must be

performed in compliance with national wiring
standard or regulation. If incorrect and incomplete
wiring is carried out, it will cause an electrical fire
or electrical shock.

2. Do not use the inter-connecting cable.

Never execute the connection of electrical wiring
with other method than the approved one.
(exp. use the terminal block etc.)

3. Prepare the interior power supply cord capacity

sufficient for starting and usage current of air
conditioner.

4. Connect the connecting cable to the terminal as

identified with their respective matched numbers
on the terminal block of outdoor unit.

5. Fix the cable securely with the cord clamps to the

specified position.

6. Do not damage or scratch the conductive core &

inner insulator of power supply and inter
connecting cables when peeling them.

7. Do not deform or smash the surface of the cables.

Do not press or fix the cord and cables firmly with
staples, etc.

How to connect the cable

1. Remove the side panel. (2 screws)
2. Remove the electric parts cover and cord clamp.
3. Insert the connecting cable fully into the terminal

block and secure it by screw tightly.
Tightening torque : 1,2 N•m (0,12 kgf•m)

4. Secure the con-

necting cable with
the cord clamp.

5. Fix the electric

parts cover and
side panel.

How to open the screw cap

• Place your finger on the

lower part and push up to
open the screw cap.

Fig. 8-3-7

CAUTION

• Be sure to refer the wiring system diagram

labeled inside the side panel.

• Check local electrical codes and also any

specific wiring instruction or limitation.

How to remove the front panel

Fig. 8-3-8

(1) Open the screw caps and remove three front

panel fixing screws.

(2) Put the screw caps back as they were.
(3) Press the part saying “PUSH” on the air inlet grille

to open the air inlet grille.
Remove three black front panel fixing screws.

(4) Close the air inlet grille.
(5) Manually open the vertical air flow louver directly

below.

(6) Open the front panel lower portion until it comes in

contact with the vertical air flow louver. Lift up the
front panel upper portion in a forward diagonal
direction to unhook the clicks inside the front
panel upper portion.

(7) After unhooking the nails inside the main unit

upper portion, rotate the front panel upper portion
towards you to remove the front panel from the
unit body.

(6)

Screws

(6)

(7)

(1) (2)

Screw caps and screws

(5)

(3) (4)

Fig. 8-3-9

Stripping length of connecting cable