Hitachi RAC-13EX9G Installation Manual Download Page 2

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CAUTION

•

Fresh air in exhaust hose (A) or
Fresh air in exhaust hose (B)

Indoor Unit

Insulation

Fresh air in exhaust
end connection

Hose insulation

Vertically down from left • Horizontally piping from left

INDOOR UNIT

Direct mounting on the wall

Screw for mounting plate

•

CAUTION

• The draining hose in this indoor unit can be installed on the left or right. Indoor unit must be fixed horizontally or

slightly tilted towards the side of drain hose. Otherwise, condensed water may overflow the water container.

• Drill a ø 65mm hole on wall which is slightly tilted

towards the outdoor side. Drill the wall at a small angle.

• Cut the protection pipe according to the wall thickness.

• Empty gap in the sleeve of protection pipe should be

completely sealed with putty to avoid dripping of rain
water into the room.

Wall Penetration and Installation of Protection Pipe

CAUTION

Installation Of Mounting Plate, Wall Penetration And Protection Pipe

Indoor

Putty

Protection
Pipe

Sleeve of
Protection
Pipe

Putty

Wall

Outdoor

Beam

Level

Board anchor

Stamp

Line

Weight

Pipe hole

Visible outline of the indoor unit

Drain hose

For right
wall hole

For right wall hole

For right
wall hole

Center of
the wall hole

Mounting
Plate

S c r e w t h e m o u n t i n g
p l a t e a t t h e p o s i t i o n s
possibly near the upper
and lower hooks where
the indoor unit is hung.
Use 4 or more screws to
fix the mounting plater.

For right wall hole

Center of
the wall hole

Wall
hole

Center
of the wall hole

•

•
•

CAUTION

Installation Of The Indoor Unit

1. Preparation of Installation

Remove the Front Panel

• To remove front panel, please refer to page 15

“Removing and Attaching the Front Panel”.

• Make sure to use both hands to attach and remove

the front panel.

Remove the Top Grill

• To remove top grill, please refer to page

15 “Removing and Attaching the Top Grill”.

Remove the Lower Cover

• Pull at the

and

in the directions

as shown by arrows to remove the
lower cover.

• To attach the lower cover, attach

first and then attach

by rotating it

around the

as the fulcrum.

Preparation of Refrigerating Pipe and Fresh Air In Exhaust Hose

Backward piping

Cutting Lower Cover Bush

(Horizontal Downward Piping)

•

Insert drain cap up to the location
securely till the cap stops.

Move the drain hose insulation to
take out the drain hose.

After inserting the drain hose, insert the drain
hose insulation sheet to the location securely.

Be sure to insert drain hose and
drain cap firmly. Insufficient insert
may result in water leakage.

It's easier to use pliers to pull out the drain cap.

Wiring Connection

•

Refer to page 12.

Bush

Groove on the outer side

Groove on the inner side

Drain cap

Drain hose

Drain hose
insulation sheet

Drain hose

Drain hose
insulation sheet

The rib at the indoor unit side

Attaching

Removing

Changed of Drain Hose and Installation Procedures

(Horizontal Piping)

•

•
•

Place the starting
point of refrigerating
pipe bending within
the wall hole range.

If the starting point of
refrigerating pipe bending
is projected from the wall
hole range or if the bending
radius is too large, the
indoor unit may be lifted
from wall and this may
cause poor finishing.

Please bend at a
small radius to form an arc.

Wall hole
range

(Mark detail)

Center line
of wall hole

Fresh air in exhaust hose

Drain hole

Pipe support

wall hole range

Pipe support

Connecting

cord

Refrigerating

pipe

Mark detail

Drain hose

Please follow the same

layout as the mark.

Wrap with tape

Bottom cover

bush hole

Drain

hose

Fresh air in

exhaust hose

Refrigerating pipe

insulation sheet

Refrigerating pipe

insulation sheet

Cut Refrigerating

pipe

Refrigerating

pipe

Fix temporarily

with tape

Transform

after bending

downward.

Pipe

support

Refrigerating

pipe

Join the refrigerating pipe, drain
hose, two way air exchange hose
and connecting cord, and then fix
them temporarily with tape.

Wrap the through-hole portion with tape.

Horizontally and Downward Piping from right

Layout of horizontally

piping from right

Pipe support

Drain

hose

Drain

hose

CAUTION

Transform the
piping while holding
down the lower portion
of pipe-support by
hand.

•

(2)

Bend it with the

smallest radius.

Place the starting
point of refrigerating
pipe bending the
wall hole range.

< Mark detail >

If the starting point
of refrigerating pipe
bending is projected
from the wall hole
range or if the
bending radius is
too large, the indoor
unit may be lifted
from wall and this
may cause
poor finishing.

hole range

Center line
of wall hole

Fresh air in
exhaust hose

Drain hose

Refrigerating

pipe

Refrigerating

pipe

Refrigerating

pipe

Pipe support

Fresh air in
exhaust hose

Bend the refrigerating pipe to
follow the same layout as the mark.

CAUTION

•

Pipe support

Wrap with tape

below
5 mm

Insert polyester core (commercial
product) into the pipe.

The end of the refrigerating pipes are
at locations marked with “ ” symbol.

Installation after connection of refrigerating pipes

(Horizontally piping)

(Model : SP-BT-2)

B Dimensions = (807-A) mm

Indoor Unit

Wall

Pillar

Be sure that the wire is not in contact with any metal in
the wall. Please use the protection pipe as wire passing
through the hollow part of the wall so as to prevent the
possibility of damaged by mouse.
Unless it seals completely any air with high humidity
flows from outdoor and any dew may drop.

•

Ensure that the fresh air in exhaust hose which passes through the elbow the room is
covered with insulation sheet for hoses.

Dew may form on the elbow and fresh air in exhaust hose and there may be a possibility of
water droplets forming.

Air duct for rear horizontal piping

Fresh air in exhaust end connection
W r a p t h e i n s u l a t i o n f o r r e a r
horizontal piping without space
between insulation and hose, and
then secure them with tape (locally
procured)

Make sure to bring the square
hole to the bottom side

Square hole

Elbow for right piping

Securely connect the fresh air in exhaust hose to the fresh air in exhaust
connecting port. The hole for rear horizontal piping should come to the
bottom side after the connection.

(4)

Horizontally rear-out piping

(1) Cut off 100mm of the hose insulation to be wrapped around the fresh air in exhaust hose. Cover the fresh air in exhaust

hose (A) or (B) with the insulation, and secure them with vinyl tape.

(2) Securely connect the fresh air in exhaust hose to

the fresh air in exhaust connecting port.

(1)

(2)

(3)

Cut the hose insulation which is to be wrapped around the left piping elbow along the
perforation. Cover the elbow with the insulation and secure them with vinyl tape.
Cut the hose insulation along the perforation. Cut it off according to the hose length.
(Insulation length: Distance from the indoor unit to the hole in the wall.)
Securely connect the fresh air in exhaust hose (A) or (B) to the left piping elbow. Then, wrap
the insulation which has been cut according to the above (2) around the fresh air in exhaust
hoses. Cover the fresh air in exhaust hose which runs indoor side with hose insulation and
wrap the tape without any space. When horizontally piping is carried out for fresh air in
exhaust hose, the split line of the hose insulation should come to the top.

Hose insulation Perforation

Insulation for left piping elbow

Elbow for left piping
“LEFT” is indicated on the
opposite side of arrow

Larger
dimension

Smaller
dimension

Align the end face to the elbow
line, wrap and secure with vinyl
tape.

Elbow for left piping

(4) Securely connect the fresh air in exhaust hose to the fresh

air in exhaust connecting port.
(Vertically down from left and horizontally piping from left
can be arranged by turning the elbow for left piping by 90
degrees.)

2 piping directions of vertically down from left and
horizontally piping from left are available by turning
the elbow for left piping by 90 degrees.

(1)

(2)

(3)
(4)

(5)

Obtain dimension D by measuring the dimension of the
existing hole in the wall.
Remove the adapter at the tip of the air duct for rear
horizontal piping. Cut short the air duct for a length of
dimension D.
For insulation, cut it off into a length shorter than the air duct
main body by 23mm.
Attach the adapter to the tip of the air duct.
Cut the hose insulation which is to be wrapped around the
elbow for right piping along the perforation. Cover the elbow
with the insulation and secure them with vinyl tape.
Cut off 200mm of the hose insulation and wrap the cut
insulation around the fresh air in exhaust hose.

Existing hole

Proper hole

Air duct main body

Adapter

Air duct for rear
horizontal piping

When the Existing Hole in the Wall is Out of Alignment In
Case of Directly Backward Piping

F o r t h e s u b s e q u e n t p r o c e d u r e s , r e f e r t o “

D i r e c t l y

b a c k w a r d p i p i n g

" , "

V e r t i c a l l y d o w n f r o m r i g h t " ,

Horizontally piping from right

”.

Please use hidden beams in the wall to hold
the mounting plate.
When it is difficult to look for a stud, use an
item such as board anchor (sold on the open
market).

Drill hole for board anchor

•

• While placing the mounting plate on the wall,

embed the board anchor in the wall.
Slide down the mounting plate and then fix
the mounting plate with the board anchor.

When mounting using crown molding and head jamb

•

• Temporarily assemble the mounting plate and the vertical rail

according to the dimension H between the crown molding and
head jamb.
Using the crown molding and head jamb, temporarily attach
the top and the bottom of the vertical rail.
Clamp the mounting plate after making sure that it is level.

(Screws in the illustration below are supplied
with the vertical rail.)

Better finishing with small gap between the
unit and the head jamb can be obtained by
aligning the mark “Vertical Rail 0 Position”
on the mounting plate to the scale “0” on the
vertical rail.

Mark on the
mounting plate
“Vertical Rail
0 Position”

Head
jamb

Indoor unit

Position of the hole to be made in the wall can
be decided by attaching the lower cover to the
mounting plate.

When the hole in the wall is

80mm, align the

mark on

the lower side of the lower cover to the

mark on the

mounting plate. When the hole in the wall is

65mm, align

the

mark on the upper side of the lower cover to the

mark on the mounting plate.

When installing between 0.90m pillars

When installing using the existing hole in the wall

For the place where the pillar is projected from the wall surface, use the optional vertical rail
for mounting between 0.90m pillars (model: SP-BT-3) or horizontal rail (model: SP-BY-1).

When installing the unit using the existing hole in the wall but the indoor unit cannot be
moved due to a hole on the left side, form the auxiliary refrigerating pipe of the indoor unit as
shown in the illustration.

Form the pipe carefully to avoid crushing of the pipe.
For connection of the fresh air in exhaust hose, refer to “When the Existing Hole in the Wall
is Out of Alignment In Case of Directly Backward Piping” on page 5.

Existing hole in the wall

Auxiliary refrigerating pipe
of the indoor unit

Drain hose insertion cuff mark

Securely push in the drain hose until the drain
hose cuff mark comes in contact with the rib
at the indoor unit side.

Remove the auxiliary insulation material sheet which is attached to
the pipe insulation. (Keep the removed auxiliary insulation material
sheet because it will be reused after pipe connection.)
Referring to the mark on the rear side, form the pipe within the wall
hole range.

Layout for the hole in the
wall of

65 in case of

directly backward piping

Auxiliary pipe

Auxiliary insulation sheet

Finishing of pipe bending
must be within this range.

Bending of the
refrigerating pipe
must be within the
wall hole range.

Exchange the location of drain hose and drain cap while
installing the pipe from the left side as shown on top right.
Remove the lower cover.
Do not carry out horizontal piping for drain hose.

Center line

of wall hole

Fresh air in exhaust hose

Layout for the hole in the

wall of

65 in case of

directly backward piping

Auxiliary pipe

Bending of the

refrigerating pipe

must be within the

wall hole range.

hole range

wall

Remove the auxiliary insulation material sheet which is attached
to the pipe insulation. (Keep the removed auxiliary insulation
material sheet because it will be reused after pipe connection.)
Carry out refrigerating pipe forming.

In case of horizontally piping from
right, the fresh air in exhaust hose
runs below the pipe. Bend the pipe
so that it comes to the upper end
of the bottom cover bush hole, as
shown in the illustration on the
right.

Connect the fresh air in exhaust hose. (Refer to page 3
"Fresh Air In Exhaust Hose Installation").
Referring to the mark at the back, join the refrigerating pipe,
drain hose, fresh air in exhaust hose and connecting cord,
and then fix them temporarily with tape.

Connect the fresh air in exhaust hose.
(Refer to page 3 "Fresh Air In Exhaust Hose Installation").
Referring to the mark at the back, join the refrigerating pipe,
drain hose, fresh air in exhaust hose and connecting cord,
and then fix them temporarily with tape.

Remove the auxiliary insulation material sheet which is
attached to the pipe insulation. Connect the refrigerating pipe.
Cut the heat insulation sheet refrigerating pipe aligning to the
insulation sheet of the pipe and fix them temporarily with tape.
Cover the pipe connection with the auxiliary insulation sheet,
which has been removed on earlier stage, with its split line on
the top. Wrap the tape without any space. Tape must not be
over tightened.

Auxiliary insulation sheet

Form the refrigerating pipe according to the wall hole position.
Especially in case of horizontally backward piping, follow the
instruction below to carry out accurate forming.

Layout for the hole in the wall

65 in case of horizontally

backward piping

wall

Referring to the mark at the back, start bending the
refrigerating piping within wall hole range.

When forming, bend the refrigerating pipe with the
smallest radius as the layout of the mark.

Connect the fresh air in exhaust hose. (Refer to
page 3 "Fresh Air In Exhaust Hose Installation").
Form the connecting cord and refrigerating pipe and
put them in the space on the lower side of the rear
surface of the indoor unit. Fix them with the pipe
support.
Join refrigerating pipe, fresh air in exhaust hose,
connecting cord and drain hose temporarily with
tape and wrap the through-hole portion with tape.

Pipe support can be installed to
whichever side of the installation
points. However, it is recommended
to attach it on the right side viewing
from the rear.

Form and set the refrigerating pipe and the connecting
cord.

Connecting the Refrigerating Pipe at the Back of the
Indoor Unit

•

P l e a s e   b e n d   a t   a   s m a l l
r a d i o u s   t o   f o r m   a n   a r c .
( P i p e   c a n   b e   b e n t   w i t h   a
small radius without being
crushed if polyester core is
used.)

When using a polyester core,
make sure to insert it only after
f l a r i n g i s c a r r i e d o u t t o a v o i d
cutting dust from getting inside.

(1)

Use the groove on
the outer side when
installing the fresh
air in exhaust hose,
and use the groove
o n t h e i n n e r s i d e
when not installing.

While installing the pipe from the right, left or bottom side,
use a knife to cut openings as shown in figure. Then
smoothen the edges of openings with a file.

Vertical rail (optional)

Vertical rail is an optional accessory

Vertical rail (optional)

< IA236 :