HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit
Outdoor Unit
RAS-AJ18CMT RAC-AJ18CMT
THE CHOICE OF MOUNTING SITE
(Please note the following matters and obtain permission from customer before installation).
WARNING
!
●
The unit should be mounted at stable, non-vibratory location
which can provide full support to the unit.
WARNING
●
The outdoor unit must be mounted at a location which can support
heavy weight. Otherwise, noise and vibration will increase.
CAUTION
●
No nearby heat source and no obstruction near the air outlet is
allowed.
●
The clearance distances from top, right and left are speci
fi
ed in
fi
gure 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
fl
uorescent 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.
INDOOR UNIT
Figure showing the Installation of Indoor and Outdoor Unit.
OUTDOOR UNIT
FOR SERVICE PERSONNEL ONLY
Direction of Piping
There are 6 directions
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right,
horizontally out to left,
horizontally out to right,
vertically down from left.
Don’t form the piping downward
at the left of the unit.
●
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
Screw for Mounting Plate
( 4 . 1 x 3 2 )
Names of Indoor Components
Screw for holder of
Remote Controller
(3.1x16)
AAA Size Battery
Remote Control Holder
Mounting Plate
Qty
No.
Component’s Name
1
6
1
2
2
Remote Controller
1
2
3
4
5
6
1
<
IA1994: A
>
Installation of Hanger, Wall Penetration and Installation of Protection Pipe
1
CAUTION
!
●
The draining of the water container inside the indoor unit can be done from the left.
Therefore the mounting plate must be
fi
xed horizontally or slightly tilted towards the
side of drain hose. Otherwise, condensed water may over
fl
ow 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.
INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION
●
The refrigerating pipes should be adjusted to
fi
t 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. Then the pipes are wrapped with
insulation pipe.
●
Connect the connecting cord after removing electrical cover.
(Refer to “CONNECTION OF POWER CORD”)
●
After adjustment,
fi
t the connecting cord and pipes into the
space available under the indoor unit.
●
When connection is at left side, refrigerating pipe and cabinet
shall be tied together.
Failing to do so may cause the unit bottom side become warping.
Excess binder shall be cut to prevent abnormal sound and water
dripping.
!
CAUTION
●
The rubber strap used for
fi
the insulator should not be tied
with great force. Otherwise, this
will damage heat insulation and
causes water condensation.
THE CONNECTION OF REFRIGERATING PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
!
CAUTION
●
Please
fi
x in the plastic core
after
fl
aring to avoid copper
chips entering the pipes.
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
dew may drop.
!
WARNING
●
The refrigerating pipes and connecting cord
arrangement are attached.
●
The end of the refrigerating pipes are at locations
marked with “
” symbol.
Installation of Drain Hose
3
INDOOR UNIT
Heat insulation pipe
Connecting
cord
Refrigerating pipe
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
Procedures of Installation and Precautions
●
Procedures to
fi
x the mounting plate.
1. Drill holes on wall. 2. Push plug into the holes. 3. Fix the mounting plate on wall
(As shown below)
(As shown below)
with 4.1 x 32 screw
(As shown in
fi
gure below)
●
Procedures to
fi
x the holder of remote control.
1. Drill holes on wall.
2. Push plug into the holes.
(As shown below)
(As shown below)
Installation of the Indoor Unit
2
VERTICALLY DOWNWARD PIPING
Preparation
●
Connect connecting cord.
●
Pull out the pipe, connecting 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.
!
CAUTION
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
fi
gure 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).
!
CAUTION
Condensed water
may leak out if not
inserted properly.
(
mark is tool exclusive use for R32)
●
+ – Screwdriver
●
Measuring Tape
●
Knife
●
Saw
●
Pipe Cutter
●
Hexagonal Wrench Key (
4mm)
●
Power Drill (ø 65mm ~ ø 80mm)
●
Vacuum Pump
●
Pliers or Wrench
●
Torque Wrench
Vacuum Pump
Adaptor
Flare Tool
Gas Leakage Detector
Manifold Valve
Charge Hose
Dimension of Mounting Stand
of the outdoor unit
(unit : mm)
●
The difference in
height between the
indoor and outdoor
unit should be kept
max 10m.
●
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 (commer-
cial product).
The indoor piping
should be insulated
with the enclosed
insulation pipe.
(If the insulator is
insuf
fi
cient, please
use commercial
products).
Be sure to
completely
seal any
gap with
putty.
HOW TO REMOVE INDOOR UNIT
●
Push up the (PUSH) sections at the bottom of the indoor unit and
pull the bottom plate towards you. Then the claws are released from
the stationary plate.
(The (PUSH) sections are indicated by 2 arrows in the right
fi
gure)
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.
●
Wrap the refrigerating pipes with insulation pipe after connecting
refrigerating pipe.
●
Connect the connecting cord after removing electrical cover. (Refer
to “Connection of Power Cord”)
●
After adjustment, the connecting cord and refrigerating pipes are
placed into the space available under the Indoor unit.
●
The projection of Indoor unit must hook to the mounting plate.
!
!
CAUTION
●
Selecting the installation location: Suitable location that will reduce the
impact from rain and direct sun that may affect the unit performance.
Besides that, ventillation 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, front and back are speci
fi
ed
in
fi
gure below. At least 3 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
fl
ammable 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.
●
Do not install outdoor unit facing strong wind direction. It may damage
the fan motor.
●
Do not install the outdoor unit in a place where small animals may build
their nests. If small animal goes inside the unit and touches the electrical
parts, failure of the unit, smoke or
fi
re may be caused. Request your
customer to keep the surrounding of the unit is clean.
●
Remove the cap for
drain hose installation
Drain cap
Drain cap shall
be fully tightened
by pushing with
Hexagonal wrench
key when changing
location.
!
CAUTION
!
You are free to choose the side (left or right) for the installation of drain
hose. Please ensure the smooth
fl
ow of condensed water of the Indoor
unit during installation. (Carelessness may result in water leakage.)
!
CAUTION
Be sure that the
drain hose is not
loosely connected
or bend.
Above
100mm
CAUTION
●
Do not guide the drain hose to places where corrosive gases (sulfur,
ammonia, etc.) are generated, such as septic tanks and sewer.
Corrosive gas may
fl
ow backward from the drain hose to the indoor unit,
corrode the copper pipe, or it may cause offensive odors in the room.
●
Cut the drain hose at a position 100 mm higher than the
fl
oor surface. It
may cause water leakage due to air lock or clogging of foreign matter.
!
0.85m
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.
!
!
●
Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
Any un
fi
t method or using incompatible material may cause product damage, burst and serious injury.
●
The appliance/pipe-work shall be stored in a well ventilated room with
fl
oor area larger than A
min
(m
2
) [refer to
fi
gure
installation] and without any continuously operating ignition source. Keep away from open
fl
ames, any operating gas
appliances or any operating electric heater. Else, it may explode and cause injury or death.
●
The appliance/pipe-work shall be installed, and/or operated in a room with
fl
oor area larger than A
min
(m
2
) [refer to
fi
gure installation] and keep away ignitioon sources, such as heat/spark/open
fl
ame or hazardous areas such as gas
appliances, gas cooking, reticulated gas supply systems or electric cooking appliances, etc.
●
Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat,
fl
ame, sparks, or other
sources of ignition. Else, it may explode and cause injury or death.
●
Flare nut must use a torque wrench without fail. Tighten with the speci
fi
ed tightening torque. If the
fl
are nut is tightened too
much, after a long period of time, the
fl
are nut breaks, Gas leakage, stagnation, touching
fi
re, rarely cause ignition.
●
Sharp bending of the pipe use the polyethylene rod, bend not crushed the pipe. Gas leakage from the crushed part, stagnation,
touching
fi
re, rarely cause ignition.
●
Please request your s
ales ag
ent or quali
fi
ed technician to install your unit. Water leakage, short circuit or
fi
re 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
fi
re.
●
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.
●
Please ensure smooth
fl
ow of water when installing the drain hose.
●
Piping shall be suitable supported with a maximum spacing of 1m between the supports.
●
Please use the speci
fi
ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock
and
fi
re may occur.
●
Be sure to use the speci
fi
ed piping set for R32. Otherwise, this may result in broken copper pipes or faults.
●
When installing or removing an air conditioner, only speci
fi
ed refrigerant (R32) shall be allowed, do not allow air or moisture
to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a
rupture may be caused.
●
Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with
fi
re, a poisonous
gas may occur. Be aware that refrigerants may not contain an odour.
●
After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks
into the room, coming into contact with
fi
re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
●
Unauthorized modi
fi
cations to the air conditioner may be dangerous. If a breakdown occurs please call a quali
fi
ed air conditioner
technician or electrician. Improper repairs may result in water leakage, electric shock and
fi
re, etc.
WARNING
WARNING
!
!
This symbol shows that this equipment
uses a
fl
ammable refrigerant.
If the refrigerant is leaked, together
with an external ignition source, there
is a possibility of ignition.
This symbol shows that the Operation
Instructions should be read carefully.
This symbol shows that a service
personnel should be handling this
equipment with reference to the
Installation Manual.
This symbol shows that there is
information included in the Operation
Manual and/or Installation Manual
WARNING
CAUTION
CAUTION
CAUTION
CAUTION
●
A brazed, welded or mechanical
connection shall be made before
opening the valves to permit
refrigerant to
fl
ow between the
refrigerating system parts. A vacuum
valve shall be provided to evacuate
the interconnecting pipe and/or any
uncharged refrigerating system.
●
Mechanical connectors used indoor
shall comply with ISO 14903.
When mechanical connectors are
reused indoors, sealing parts shall
be renewed. When
fl
are joints are
reused indoors, the
fl
are part shall
be re-frabricated.
●
Refrigerant tubing shall be protected
or enclosed to avoid damage.
!
RAC-AJ18CMT
––
1.20kg
Model
Maximum
charge R32
Additional
R32
1.20kg
0.84m
2
20m
Factory
charge R32
Indoor
A
min
(m
2
)
Chargeless
up to
●
Flare connection only at outside of building
WARNING
!
Refrigerant piping
must be protected
from physical
damage. Install a
plastic cover or
equivalent.
In case the pipe length is more than the recommended length for chargeless,
add refrigerant R32 as below. Do not exceed the maximum pipe length.
CAUTION
!
Purifying Filter
7
2
