Hitachi RAS-E10CBT, RAC-E10CBT Installation Manual
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-E10CBT RAC-E10CBT
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.
!
!
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 specifi 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.
CAUTION
!
● 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, front and back
are specifi ed in fi gure 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 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.
INDOOR UNIT
Names of Indoor Components
QtyNo. Item
The Length of Indoor Unit
Connecting Cord
Figure showing the Installation of Indoor and Outdoor Unit.
OUTDOOR UNIT
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 hanger must be fi xed horizontally or slightly tilted towards the
side of drain hose. Otherwise, condensed water may overfl ow the water container.
Direct Mounting On The Wall
● Please use hidden beams in the wall to hold the hanger.
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 to avoid
dripping of rain water into
the room.
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 hanger.
● The projection at the lower part of the indoor unit is hooked
onto the hanger.
Please pull the lower
part of the indoor unit
outwards to check if
the unit is hooked
onto the hanger.
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).
●
Remove the cap for
drain hose installation
!
CAUTION
Condensed water
may leak out if not
inserted properly.
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.
!
CAUTION
INDOOR UNIT
FOR SERVICE PERSONNEL ONLY
● 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 vinyl
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.
Direction of Piping
Dimension of Mounting Stand
of the outdoor unit
(unit : mm)
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Hanger
1
Screw for holder of
Remote Controller
(3.1x16)
AAA Size Battery
Screw for Hanger
Holder for Remote
Controller
(4.1x32)
Remote Controller
6
1
2
2
1
1
2
3
4
5
6
WARNING
!
CAUTION
!
● A circuit breaker or fuse (10A time delay) must be installed. Without a circuit breaker or fuse the danger of electric shock
exists.
A main switch with a contact gap of more than 3mm has to be installed in the power supply line to the outdoor unit.
● Do not install the unit near a location where there is fl ammable gas. The outdoor unit may
catch fi re if fl ammable gas leaks around it.
● 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 request your sales agent or qualifi 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.
● Observe the rules and regulations of the electrical installation and the methods described in the installation manual when
dealing with the electrical work. Use power cables approved by the authorities of your country.
● Be sure to use the specifi ed 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 fi re.
● Please use the specifi 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 specifi ed piping set for R22. Otherwise, this may result in broken copper pipes or faults.
● When installing or removing an air conditioner, 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.
● 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 modifi cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualifi ed air
conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and fi re, etc.
Purifying Filter
1
7
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.
In case the pipe length is more than 8m, add refrigerant R22 at
10 gram per every meter exceeds. However, pipe length shall
not exceed 15m.
CAUTION
!
The refrigerant piping should
be insulated with the enclosed
insulation pipe. (If the insulator
is insufficient, please use
commercial products).
●
+ – 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 ● Reammer ● File
●
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
Procedures of Installation and Precautions
● Procedures to fi x the hanger.
1. Drill holes on wall. 2. Push plug into the holes. 3. Fix the hanger 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 controller.
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
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. Use
holder to hold them tight.
CAUTION
●
The rubber strap used for
fi xing the insulator should
not be tied with great force.
Otherwise, this will damage
heat insulation and causes
water condensation.
●
Holder can be attached at the either of 2 places.
Please select the easier position.
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 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 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.
●
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
Installation
Hang the Indoor unit onto the hanger. Use the temporary
stand at the back of the Indoor unit to push its lower part
15cm forwards. (Shown as right fi gure)
●
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 hanger.
Heat insulation pipe
Connecting
cord
Refrigerating pipe
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
!
!
!
!
OUTDOOR UNIT
● Please mount the outdoor unit on stable ground to prevent
vibration and increase of noise level.
● Open the side plate by unscrewing the screws as shown
below.
Gas Leakage Inspection
Please use gas leakage detector to check if leakage
occurs at the connection of Flare nut as shown on the
right.
If gas leakage occurs, further tighten the connection to
stop leakage.
FINAL STAGE OF INSTALLATION
Insulation And Maintenance Of Pipe Connection
1
● The connected terminals should be completed sealed with heat
insulator and then tied up with rubber strap.
● Please tie the pipe and power line together with vinyl tape as shown
in the fi gure showing the installation of indoor and outdoor units.
Then fi x their position with holders.
● To enchance the heat insulation and to prevent water condensation,
please cover the outdoor part of the drain hose and pipe with
insulation pipe.
● Completely seal any gap with putty.
Installation Of Remote Controller
2
Power Source And Operation Test
3
● The remote controller can be placed in its holder which is fi xed on
wall or beam.
● To operate the remote controller at its holder, please ensure that the
unit can receive signal transmitted from the controller at the place
where the holder is to be fi xed. The unit will beep when signal is
received from the remote controller. The signal transmission is weaken
by the fl orescent light. Therefore, during the installation of the remote
control holder, please switch on the light, even during day time, to
determine the mounting location of the holder.
Power Source
CAUTION
!
● Please use a new socket. Accident may occur due to the use of
old socket because of poor contact.
● Please plug in and then remove the plug for 2 – 3 times. This
is to ensure that the plug is completely plugged into the socket.
● Keep additional length for the power cord and do not render the
plug under external force as this may cause poor contact.
● Do not fi x the power cord with U-shape nail.
Operation Test
● Please ensure that the air conditioner is in normal operating condition
during the operation test.
● Explain to your customer the proper operation procedures as
described in the user’s manual.
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Preparation of Pipe
1
● Use a pipe cutter to cut the copper pipe.
● Jagged edge will cause leakage.
● Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
● Before fl aring, please put on the fl are nut.
Pipe Connection
2
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
CAUTION
!
Outer
diameter
of pipe
6.35 (1/4")
9.52 (3/8")
Valve head cap
Valve core cap
Torque N.m
(kgf
● cm)
13.7 ~ 18.6 (140 ~ 190)
34.3 ~ 44.1 (350 ~ 450)
19.6 ~ 24.5 (200 ~ 250)
12.3 ~ 15.7 (125 ~ 160)
Outer
Diameter (ø)
6.35 (1/4")
9.52 (3/8")
Imperial fl aring tool
0.8 ~ 1.5
1.0 ~ 1.8
Rigid fl aring tool
0 ~ 0.5
0 ~ 0.5
A (mm)
Small diameter
side
Big diameter
side
WARNING
● You may not be able to close the side cover due to the
connecting cord, under such situation, please press against
the wall of side cover to fi x it.
● Be sure that the hooks (2 places) are plugged in.
Otherwise, water penetration may occur and this causes
short circuit or faults.
Checking for the electric source and the
voltage range
● Before installation, the power source must be checked and necessary wiring work
must be completed. To make the proper wiring capacity, use the wire gauges list
below for the lead-in from a pole transformer and for the wiring from a switch
board of fuse box to the outlet in consideration of the locked rotor current.
● Investigate the power supply capacity and other electrical
conditions at the installation location.
Depending on the model of room air conditioner to be
installed, request the customer to make arrangements for
the necessary electrical work etc.
The electrical work includes the wiring work up the outlet.
In localities where electrical conditions are poor, use of a
voltage regulation is recommended.
Wire length
up to
16m
up to 10m
up to 15m
up to 25m
up to 42m
Wire gauge
1.6mm (B.S. 14)
2.0mm (B.S. 12)
2.6mm (B.S. 10)
3.2mm (B.S. 18)
14mm
2
(B.S. 16)
IMPORTANT
● THIS APPLIANCE MUST BE EARTHED.
Procedures of Wiring
● Connect the electrical wiring between the indoor and outdoor unit as shown in below Fig.
Never connect the wiring by mistake.
● The connection cord must be fi xed by the band which is located on the electrical box.
Wiring Of The Outdoor Unit
● Please remove the side cover for wire connection.
!
WARNING
!
CONNECTION OF POWER CORD
CAUTION
!
In case of removing Flare nut of a cooling unit, fi rst remove a nut of
small diameter side, or else seal cap of big diameter side will fl y out.
● Please be careful when bending the copper pipe.
● Applied frozen grease to the connection points and then screw in manually. After
that, use a torque wrench to tighten the connection.
WARNING
!
Power supply shall be connected at the rated voltage, otherwise the unit will be broken
or could not reach the specifi ed capacity.
Detail of cutting the connecting cord
To remove the connecting wires
for the indoor unit, please remove
the low cover panel in front of
the unit.
Please face this side (suction
side) of the unit to the wall.
Please remove side cover
when connecting the piping
and connecting cord.
Pull downward
Earth terminal
B
A
AB
Wiring Of The Indoor Unit
●
For wire connection of the Indoor unit, you need to remove front panel and electrical cover.
Method to remove front panel
●
Refer to “How to Remove The Front Cover”.
CAUTION
!
Please make sure to remove all spacers inside the unit.
● Open the Top, Back and Side cover of the unit.
● Pull out the spacers inside.
(Spacers are only for transportation purpose).
If not remove, vibration and noise will occur.
Top cover
Back cover
Side cover
The controller should be insert from top into bottom side of the
holder as shown in fi gure below.
● The naked part of the wire core should be 10 mm and fi x it to the terminal tightly. Then try
to pull the individual wire to check if the contact is tight. Improper insertion may burn the
terminal.
● Be sure to use only power cables approved from the authorities in your country. For example
in Germany: Cable type: NYM 3x1.5mm
2
, (fuse = 20A time delay)
● Please refer to the installation manual for wire connection to the terminals of the units. The
cabling must meet the standards of electrical installation.
● There is a AC voltage of 220V between the L and N terminals. Therefore, before servicing,
be sure to remove the plug from the AC outlet or switch off the main switch.
Method to remove the low cover
● Pull the cover at
1
and 2 in the directions as shown by arrows to
remove the cover.
How to Remove The Front Cover
1 Remove the front panel.
● Please remove and attach the front panel by
both hands.
● After opening the front panel by both hands.
➀ Undo the right arm while pushing it inside.
➁ Slide the front panel to right as shown in fi gure.
Then remove while pulling it to front.
2 Remove the fi lters.
3 After removing two screws, pull the center of
the front cover towards you and release the
claws.
4 Pull the side faces (lower sections) of the front
cover towards you as shown in the fi gure and
remove the cover.
How to Attach the Front Cover
1 Check that the drain pan is securely attached.
2 After installing the front cover onto the unit, hook
three claws at upper side of the cover securely.
Then, push the center of the front cover to lock
the claws.
3 Tighten the two screws.
4 Install the fi lter.
5 Slide the shafts of the right and left arms on the
washable panel along the steps to insert the shafts
into the holes till they stop. After checking that the
shafts are securely inserted, close the panel.
!
CAUTION
Note:
● Outdoor supply cords shall not be
lighter than polychloroprene sheathed
fl exible cord, 60245 IEC 57.
IMPORTANT
10A time delay fuse
Fuse Capacity
Removal Of Air From The Pipe And Gas Leakage Inspection
3
Procedures of using Vacuum Pump for Air Removal
AIR REMOVAL
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
Lo Hi
Meter showing pressure
Closed
R410A
Manifold valve
Vacuum
pump
Valve
Charge hose
Valve
Vacuum pump
adapter
When pumping starts, slightly loosen the
fl are nut to check of air sucked in. Then
tighten the fl are nut.
As shown in right fi gure, remove the cap of
valve core. Then, connect the charge hose.
Remove the cap of valve head. Connect the
vacuum pump adapter to the vacuum pump
and connect the charge hose to the adapter.
Fully tighten the “Hi” knob of the manifold
valve and completely unscrew the “Lo” knob.
Run the vacuum pump for about 10~15
minutes, then completely tighten the “Lo” knob
and switch off the vacuum pump.
2
Completely unscrew the spindle of the
service valve (at 2 places) in anti-clockwise
direction to allow the fl ow of refrigerant (using
Hexagonal Wrench key).
Re-cap the service valve and tighten using
wrench. Check the cap’s periphery if there is
any gas leakage. The task is then completed.
Remove the charge hose and tighten the cap
of valve core. Check the cap’s periphery if
there is any gas leakage.
4
5
1
3
Connect the
earth cord
After remove the
screw and band,
put the connecting
cords and fi x the
band with screw.
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