Hitachi RAS-50YHA3, RAC-50YHA3 Installation Manual
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.
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.
INDOOR UNIT
● 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 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).
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commercial
products).
Be sure to
completely
seal any
gap with
putty.
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 with
putty 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).
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.
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.
!
WARNING
● The refrigerating pipes and connecting cord
transform and 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.
● 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.
INDOOR UNIT
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HOW TO REMOVE INDOOR UNIT FROM HANGER
● Pull down PULL section on the bottom of indoor
unit and pull it towards you, then claws are
released from hanger. (Indicated by 2 arrows
in the drawing on the right.)
● When bottom face of indoor unit cannot be
pulled due to obstacles, etc. Remove front cover,
insert screw driver into circle hole, pull claws
down and pull indoor unit towards you.
● Please check how to remove and attach front
cover in this instruction manual.
!
CAUTION
Condensed water may leak out if not inserted properly.
HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS
● During horizontal or downward piping, use a knife to cut
openings as shown in fi gure. Then smoothen the edges of
openings with a fi le.
● Turn the piping while holding down the
lower portion of pipe-support by hand.
Heat insulation pipe
Connecting
cord
Refrigerating pipe
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
Names of Indoor Components
Hanger
QtyNo. Item
Figure showing the Installation
of Indoor and Outdoor Unit.
➀
1
Screw for holder of
Remote Controller
(3.1x16)
AAA Size Battery
Direction of Piping
Dimension of Mounting Stand
of the Outdoor unit
(unit : mm)
Holder for Remote
Controller
There are 6 directions
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right and
horizontally out to left.
(4.1x32)
Remote Controller
Purifying Filter
➁
6
➂
1
➃
2
➄
2
➅
➆
➇
1
2
Screw for Hanger
3
Bush
Names of Outdoor Components
QtyNo. Item
➈
Drain Pipe
1
➉
Bush
Bush
1
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 control.
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-50YHA3 RAC-50YHA3
FOR SERVICE PERSONNEL ONLY
●
+ – 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
!
● A circuit breaker or fuse (16A time delay) must be installed. Without a circuit breaker or fuse the danger of electric
shock exists.
The external switch shall be incorporated to completely disconnect from power supply. It should disconnect all poles, and a
contact separation of at least 3mm must be present.
● 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.
●
Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist fl ows to the indoor unit. The oil
will deposit on the heat exchanger, thereby reducing the indoor unit performance and may deform and in the worst case,
break the plastic parts of the indoor unit.
● 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.
CAUTION
WARNING
!
● The Outdoor unit must be mounted at a location which can support
heavy weight. Otherwise, noise and vibration will increase.
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 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 connecting cord 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 clean.
OUTDOOR UNIT
WARNING
!
● 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 R410A. Otherwise, this may result in broken copper pipes or faults.
● When installing or removing an air conditioner, only specifi ed refrigerant (R410A) 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.
● 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.
● 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.
SAFETY PRECAUTION
!
!
Refrigerant pipe size (outer diameter): Narrow pipe, Liquid (ø6.35mm) ; Wide pipe, Gas (ø12.70mm)
OUTDOOR UNIT
Please mount the Outdoor unit on stable ground to prevent vibration
and increase of noise level.
Decide the location for piping after sorting out the different types of
pipe available.
When removing side cover, please pull the handle after undoing the
hook by pulling it downward.
Removal Of Air From The Pipe And Gas Leakage Inspection
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. (Be sure to use R410A detector)
FINAL STAGE OF INSTALLATION
Insulation And Maintenance Of Pipe Connection
1
The connected terminals should be completely 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 uorescent 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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The controller must
be hooked onto the
hook at the lower
part of the holder.
Push in the remote
controller in the
direction as shown
in fi gure below.
3
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
!
AIR REMOVAL
WARNING
If you cannot attach the side cover due to
the connecting cord, press the connecting
cord in direction to the front panel to fi x
it.
Be sure that the hooks of the side cover is
fi xed in certainly. Otherwise water leakage
may occur and this causes short circuit
or faults.
The connecting cord should not touch to
service valve and pipes. (It becomes high
temperature in heating operation.)
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
.
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 240V 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.
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
wiring capacity proper, 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 main switch and outdoor
unit 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
outdoor. In localities where electrical conditions are
poor, use of a voltage regulation is recommended.
CAUTION
● THIS APPLIANCE MUST
BE EARTHED.
Procedures of Wiring
Wiring of The Outdoor Unit
Please remove the side cover for wire connection.
!
WARNING
!
CONNECTION OF POWER CORD
WARNING
!
How to Remove The Front Cover
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
● Recommend to use
R410A fl aring tool.
CAUTION
!
In case of removing fl are nut of an Indoor unit, fi rst remove a nut
of small diameter side, or a seal cap of big diameter side will fl y
out. Prevent water from entering into the piping when working.
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
Closed
R410A
Valve
Charge hose
Vacuum pump
adapter
When pumping starts, slightly loosen the
fl are nut to check of air sucked in. Then
tighten the fl are nut.
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 Remove the caps and
screws at the lower portion
of the front cover.
4 Pull the front cover upward
as far as the location where
the lower portion of the front
cover is on the defl ector.
5 Remove while pulling the front
cover in direction to arrow as
shown in fi gure to hold the both
sides of front cover.
Screw
Lower portion of front cover
How to Attach the Front Cover
➀ After covering the front cover to the unit, certainly hook
at the upper portion (three places). Then, check that the
drain pan is certainly attached. Push the center of front
cover in the direction of arrow.
➁ Fix the front cover at lower portion by screws and attach
the caps.
➂ Attach the front panel.
Certainly insert the left shaft of the front panel to the hole
of the front cover. Next insert the right shaft as same as
the left.
➃ Attach the fi lters which are placed the surface written
“FRONT” up.
After attaching the fi lters, push the front panel at three
arrow portion as shown in fi gure and close it.
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There are holes on the base of Outdoor unit for condensed
water to exhaust.
In order to fl ow condensed water to the drain, the unit is installed on a
stand or a block so that the unit is 100mm above the ground as shown
fi gure. Join the drain pipe to one hole.
At fi rst insert one portion of the hook to the base (Portion A), then pull the
drain pipe in the direction shown by the arrow while inserting the hook
into the base. After installation, check whether the drain pipe cling to the
base fi rmly.
When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy
conditions, water from the heat exchanger may freeze on the base surface
to cause poor drainage. When using the air conditioner in such areas, do
not install the bushings. Keep a minimum of 250mm between the drain
hole and the ground. When using the drain pipe, consult your sales agent.
For more details, refer to the installation Manual for Cold Areas.
A
Lo Hi
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 “FINAL STAGE OF INSTALLATION – How to Remove
The Front Cover”.
Method to remove electrical cover
Remove the screw
and electrical
cover.
Insert the
connecting cord
(C, D) from the
bottom of unit.
Fixed the wire
to terminal wires
fi rmly as shown in
fi gure at right side.
AUTO
RESTART
SWITCH
Electrical
cover
Screw
CD
GRN + YEL
Strip wires
Power is supplied from Outdoor Unit
Indoor Unit
Outdoor Unit
Strip wires
Power line
Control line
GRN + YEL
Use 16A Time
Delay Fuse
Power supply shall be connected at the rated voltage, otherwise
the unit will be broken or could not reach the specifi ed capacity.
Outdoor supply cords shall not be lighter than
polychloroprene sheathed fl exible cord with code
designation 60245 IEC 57.
IMPORTANT
Cable length
up to
16m
up to 15m
up to 25m
Wire cross-section
1.5mm
2
2.5mm
2
4.0mm
2
[For all optional part, please refer catalog for part
number]
Connection to the electrical box:
Remove the cover of electrical box.
Connect the connector of Weekly Timer/wired remote
controller to CN1102.
Assemble back the cover of electrical box.
Please refer to the respective user manual of Weekly
Timer/wired remote controller for further details.
Please be careful not to damage lead wires by edge
of plate when connecting the optional parts.
WEEKLY TIMER / WIRED REMOTE CONTROLLER
How To Connect The Optional Parts
(RAC Adapter, Weekly Timer, Wired Remote Control)
BASE
DRAIN PIPE
Cap
Defl ector
Vacuum
pump
Manifold valve
Meter showing pressure
Valve
After remove the screw
and band, put the
connecting cords and fi x
the band with screw.
Connect the
earth cord
Guide
Shaft
Hole
CN1101
CN1102
RAC Adaptor cord
Weekly timer cord/
Wired remote
controller cord
Procedures of using Vacuum Pump for Air Removal
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
Outer
Diameter
mm (inch)
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
15.88 (5/8")
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
Clutch type
A (mm)
1.5 ~ 2.0
1.5 ~ 2.0
1.5 ~ 2.5
1.5 ~ 2.5
Wing nut type
Thickness
(mm)
0.8
0.8
0.8
1.0
0.0
~ 0.5
0.0
~ 0.5
0.0
~ 0.5
0.0
~ 0.5
Flare tool for R410A
Clutch type
Conventional fl are tool
D
C
N
L
Earth terminal
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
15.88 (5/8")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
Valve
head cap
Torque N·m
(kgf
·
cm)
14.0 – 18.0 (140 – 180)
33.0 – 42.0 (330 – 420)
50.0 – 62.0 (500 – 620)
63.0 – 77.0 (630 – 770)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
29.4 – 34.3 (300 – 350)
12.3 – 15.7 (125 ~ 160)
Small dia. side
Large dia. side
Valve core cap
Small dia. side
Large dia. side
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