Screw for Hanger
( Φ 4 x 3 5 )
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
+ – Screwdriver Measuring Tape Knife
Saw
ø 65mm Power Drill
Allen Key ( 4mm)
Wrench (14, 17, 19, 22mm)
Gas Leakage Detector Pipe Cutter
Plastic Tape Pliers Flare Tool
Carefully read through the procedures of proper
installation before starting installation work.
The sales agent should inform customers regarding
the correct operation of installation.
Tools Needed For Installation Work
SAFETY PRECAUTION
Read the safety precautions carefully before operating the unit.
The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
WARNING ........ Incorrect methods of installation may cause death or serious injury.
CAUTION ......... Improper installation may result in serious consequence.
Be sure that the unit operates in proper condition after installation. Explain to customer the proper way of operating
the unit as described in the user’s guide.
Be sure to use the earth line. Do not place earth line near gas or water pipes, lightning conductor
and the earth line of telephone. Improper earthing may cause electric shocks.
A circuit breaker should be installed depending on the mounting size of the unit. Without a circuit breaker, the
danger of electric shock exists.
Do not install the unit near a location where there is flammable gas. The outdoor unit may
catch fire if flammable gas leaks around it.
Please ensure smooth flow of water when installing the drain hose.
Please request your sales agent or qualified technician to install your unit. Water leakage, short circuit or fire may
occur if you do the installation work yourself.
Please observe the instructions stated in the installation manual during the process of installation. Improper
installation may cause water leakage, electric shock and fire.
Make sure that the units are mounted at locations which are able to provide full support to the weight of the units.
If not, the units may collapse and impose danger.
Observe the rules and regulations of the electrical installation and the methods described in the installation manual
when dealing with the electrical work. Use wire which is specified for the air conditioner. A short circuit and fire
may occur due to the use of low quality wire or improper work.
Be sure to use the specified wire for connecting the indoor and outdoor units. Please ensure that the connections
are tight after the conductors of the wire are inserted into the terminals. Improper insertion and loose contact may
cause over-heating and fire.
Please use the specified components for installation work. Otherwise, the units may collapse or water leakage,
electric shock and fire may occur.
Do not mix any coolant other than R-22 into the cooling circulation path when mounting or shifting the unit. If it
is mixed with air, the high pressure in the circulation path will rise and this may result in broken copper pipes or
faults.
THE CHOICE OF MOUNTING SITE
(Please note the following matters and obtain permission from customer before installation).
The unit should be mounted at stable, non-vibratory location which
can provide full support to the unit.
The outdoor unit must be mounted at a location which can sup-
port heavy weight. Otherwise, noise and vibration will increase.
No nearby heat source and no obstruction near the air outlet is
allowed.
The clearance distances from top, right and left are specified in
figure below.
The location must be convenient for water drainage and pipe
connection with the Outdoor unit.
To avoid interference from noise please place the unit and its
remote controller at least 1m from the radio, television and inverter
type fluorescent lamp.
To avoid any error in signal transmission from the remote controller,
please put the controller far away from high-frequency machines
and high-power wireless systems.
The installation height of indoor unit must be 2.3m or more in a
non public area.
Do not expose the unit under direct sunshine or rain. Besides,
ventilation must be good and clear of obstruction.
The air blown out of the unit should not point directly to animals
or plants.
The clearances of the unit from top, left, right and front are specified
in figure below. At least three of the above sides must be open
air.
Be sure that the hot air blown out of the unit and noise do not
disturb the neighbourhood.
Do not install at a location where there is flammable gas, steam,
oil and smoke.
The location must be convenient for water drainage.
Place the outdoor unit and its connection wire at least 1m away
from the antenna or signal line of television, radio or telephone.
This is to avoid noise interference.
TI
N
U
R
O
O
D
NI
Names of Indoor Components
The Length of Indoor Unit
Power Cord
Do not alter the power cord.
Direction of Piping
Figure showing the Installation
of Indoor and Outdoor Unit.
TI
N
U
R
O
O
D
T
U
O
There are 4 directions
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right and
horizontally out to left.
Don't form the piping
downward at the left of the unit.
Installation of Mounting Plate, Wall Penetration and Installation of Protection Pipe
1
The draining of the water container inside the indoor unit can be done from the left.
Therefore the mounting plate must be fixed horizontally or slightly tilted towards the
side of drain hose. Otherwise, condensed water may overflow the water container.
Direct Mounting On The Wall
Please use hidden beams in the wall to hold the mounting plate.
Wall Penetration and Installation of Protection Pipe
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.
Procedures of Installation and Precautions
Procedures to fix the mounting plate.
1. Drill holes on wall.
2.Fix the mounting plate on
(As shown below)
wall with 4.1 x 32 screw
(As shown in figure below)
Installation of the Indoor Unit
2
VERTICALLY DOWNWARD PIPING
Preparation
Connect power cord.
Pull out the pipe, power cord and drain hose.
Installation
The upper part of the indoor unit is hanged
on the mounting plate.
The projection at the lower part of the indoor
unit is hooked onto the mounting plate.
Please pull the lower part
of the indoor unit
outwards to check if the
unit is hooked onto the
mounting plate. Improper
installation may cause
vibration and noise.
HORIZONTAL PIPING
Preparation
Change of Drain Hose and Installation Procedures.
Exchange the location of drain hose and drain cap during horizontal piping as shown
in figure below. Be sure to plug in the drain hose until the insulating material folds upon
itself.
Please use pliers to pull out the drain cap.
(This is an easier way to remove the drain cap).
HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS
During horizontal or downward piping, use a knife to cut
openings as shown in figure. Then smoothen the edges
of openings with a file.
INSTALLATION OF COOLANT PIPES AFTER CONNECTION
The coolant pipes should be adjusted to fit into the
hole on the wall and then ready for further connection.
The terminals of 2 connected pipes must be covered
with insulator used for terminal connection.
Connect the power cord.
After adjustment, fit the power cord and pipes into
the space available under the indoor unit.
The rubber strap used for
fixing the insulator should
not be tied with great force.
Otherwise, this will damage
heat insulation and causes
water condensation.
THE CONNECTION OF COOLANT PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Coolant Pipes
Please fix in the plastic
core after flaring to avoid
plastic chips entering the
pipes.
CAUTION
You are free to choose the side (left or right) for the installation of drain
hose. Please ensure the smooth flow of condensed water of the indoor
unit during installation. (Carelessness may result in water leakage.)
Be sure that the
drain hose is not
loosely connected
or bent.
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.
Coolant pipes and power cord must be tied together.
The front part of the coolant pipes are at locations
marked with “ ” symbol.
Installation of Drain Hose
3
Pull this to the front
during the connection
of coolant pipes to
ease task.
Installation
Hang the indoor unit onto the mounting plate. Use the temporary
stand at the back of the indoor unit to push its lower part 15cm
forwards.
Place the drain hose through the hole on the wall.
Insulate the connecting portion of coolant pipe with insulator.
Connect the power cord.
After adjustment, the power cord and coolant pipes are placed
into the space available under the indoor unit.
The projection of indoor unit must hook to the mounting
plate.
TI
N
U
R
O
O
D
NI
AAA Size Battery
Hanger
Qty
No.
Component’s Name
1
6
2
Remote Controller
Bush
about 1.6m
about
0.9m
20
Cut away shaded
portion, and finish
the edge of the
opening so that
there is no burr.
Connection
Horizontally
perpendicular
to the unit
Pipe
Power cord
Drain hose
Pipe
Rubber strap tied with great force
Pipe
below
5mm
Please bend at a small
radius to form an arc
about 15cm
Projection
Temporary stand
Hook
Power cord
Protection
pipe
Drain
hose
Connected
terminals
of coolant
pipes
Coolant pipes
Power cord
Heat insulation
pipe
Bending
upwards
Stagment
water
Drain
Stagment
water
Openings
Drain cap
Please insert
until here
Drain hose
Please insert
until here
Mounting Plate
Hook
Coolant pipe
Power Cord
Drain Hose
Protection
Pipe
Lift the body
of the unit
upwards and
then force
it downwards.
Mounting
Plate
Projection
Power line, pipe and
drain hose must be
tied together with
plastic tape.
2~5mm
Protection
pipe
Outdoor
Indoor
Seal with
putty
Sleeve of
protection
pipe
WALL
Remove the cap for drain hose installation
Drain cap
Drain hose
Drain hose
Drain cap
Condensed water may leak out if not inserted properly.
Pipe
support
Pull up the pipe after
bending downward
Transform the piping while holding down the lower portion
of pipe-support by hand.
Indoor Unit
Outdoor Unit
RAS-ME10HZ
RAC-ME10HZ
+
RAS-ME14HZ
RAC-ME14HZ
+
In case the pipe length is more than 5m, add refrigerant R22 at
20 gram (ME14HZ)/15 gram (ME10HZ) per every meter exceeds.
1
2
3
4
5
1
1
WARNING
CAUTION
WARNING
CAUITON
WARNING
CAUITON
CAUITON
Level
Line
Hole for
pipe
Mark
Screw for Mounting plate
Please use more
than 4 screws.
Mounting
Plate
0.85m
CAUITON
CAUITON
CAUITON
CAUITON
CAUITON
CAUITON
CAUITON
External dimension of
indoor unit
450mm
400mm
316mm
20mm
125mm
44mm
42mm
390mm
530mm
780mm
80mm
65mm
45mm
10mm
65mm
65mm
125mm
199mm
280mm
41mm
45mm
wall nole
wall nole
Drain Hose
Drain Hose
Dimension of Mounting Stand of the outdoor unit
500
698
45
300
282
257
The difference in height
between the indoor and
outdoor unit should be
kept below 5m.
The connecting pipe, no
matter big or small,
should all be insulated
with insulation pipe and
then wrapped with plastic
tape. (The insulator will
deteriorate if it is not
wrapped with tape).
The connection of insulated
drain hose.
Please use insulated drain
hose for the indoor piping
(commercial product).
Be sure to
completely
seal any
gap with
putty.
about 0.45m
Maximum pipe
length 10m
above 300mm
must not bend
above 50mm
above 250mm
above 100mm
RAC-ME14HZ
RAC-ME10HZ
ME10HZ
ME14HZ
8m
10m
(For ME10HZ)
(For ME14HZ)
