Hitachi RAS-25CNH2, RAC-25CNH2 Installation Manual
Drain cap
Please insert
until here
Drain hose
Please insert
until here
below
5mm
Please bend at a small
radius to form an arc
!
Openings
FOR SERVICE PERSONNEL ONLY
Connecting cords,
pipe and drain hose
must be tied together
with Vinyl tape.
Pipe
Connecting cord
Drain hose
Refrigerating pipes
Connecting cord
Heat insulation
pipe
a
above 100mm
❈ above 300mm
above 200mm
❈ above 100mm
Maximum pipe length 8m
❈ give clearance
as wide as possible
above 50mm
above 100mm
about 0.45m
above 300mm
must not bend
above 100mm
Used in horizontal piping
1
2
6
8
4
5
3
above 50mm when
installed on the
ceiling of balcony
above 200mm
Plug
!
!
about 1.6m
about
0.9m
inner diameter ø 16mm
●
Carefully read through the procedures of proper
installation before starting installation work.
●
The sales agent should inform customers regarding
the correct operation of installation.
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-25CNH2 RAC-25CNH2
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.
Tools Needed For Installation Work
●
+ – Screwdriver ● Measuring Tape ● Knife
●
Saw ● ø 65mm Power Drill ● Hexagonal Wrench
●
Key ( 4mm)
●
Gas Leakage Detector ● Pipe Cutter
●
Vinyl Tape ● Pliers ● Flare Tool
Wrench (14, 17, 19, 22mm)
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 specified in
figure below.
●
The location must be convenient for water drainage and pipe
connection with the outdoor unit.
INDOOR UNIT
●
To avoid interference from noise please place the unit and its
remote controller at least 1m from the radio and television.
●
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.
Names of Indoor Components
QtyNo. Item
Hanger
1
1
The Length of Indoor Unit
Connecting Cord
●
The outdoor unit must be mounted at a location which can support heavy weight. Otherwise, noise and vibration will increase.
●
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 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.
OUTDOOR UNIT
●
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.
Figure showing the Installation
of Indoor and Outdoor Unit.
!
WARNING
!
CAUTION
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.
!
WARNING
●
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 only power cables which are approved from the Authorities of your
country. A short circuit and fire may occur due to the use of low quality wire or improper work.
●
Be sure to use approved cables also for the connection indoor/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.
!
CAUTION
●
This is a stationary class 1 appliance. The electrical installation should be installed fixed by using IEC approved
power cables. In the installation a main switch must be used with an opened contact gap of more than 3mm.
●
Piping shall be suitable supported with a maximum spacing of 1m between the supports.
●
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.
●
Screw for Hanger
2
Holder for Remote
Controller
3
AAA Size Battery
4
Screw for holder of
Remote Controller
5
Holder
6
Insulation pipe
7
Remote Controller
8
Drain Pipe
9
Purifying Filter
0
Seal
!
Bush
@
(4.1x32)
(3.1x16)
6
20
1
Direction of Piping
2
Connection
There are 3 directions
2
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right.
1
Don’t form the piping
downward at the left of the unit.
Dimension of Mounting Stand
1
of the outdoor unit
(unit : mm)
mounting stand
1
500
1
1
1
2
Cut away shaded
portion, and finish
the edge of the
opening so that
there is no burr.
Horizontally
perpendicular
to the unit
35
12
8
35
100
Be sure to
completely
seal any
gap with
putty.
The indoor piping should be
insulated with the enclosed
225
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).
● 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).
1
Installation of Hanger, Wall Penetration and Installation of Protection Pipe
!
CAUTION
●
The draining of the water container inside the indoor unit can be done from the left.
Therefore the hanger 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 hanger.
External Dimension
20mm
42.5mm
62mm
ø65mm
11mm
798mm
of Indoor unit
80mm
20mm
42.5mm
95mm
265mm
Hanger
Screw for Hanger
Please use more
than 4 screws.
Line
Weight
Mark
Level
Hole for
pipe
2
Installation of the Indoor Unit
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.
Hanger
Refrigerating
Pipe
Protection
Pipe
Drain Hose
Connecting
Cord
Lift the body
of the unit
upwards and
then force
it downwards.
Hanger
Projection
Hook
!
CAUTION
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.
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.
INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION
●
The refrigerating 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. Then the
pipes are wrapped with insulation pipe.
●
Connect the connecting cord.
●
After adjustment, fit 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
fixing the insulator should
not be tied with great force.
Insulation pipe
7
Otherwise, this will damage
heat insulation and causes
Holder
Pipe
Insulation pipe (must be wrapped with
vinyl tape at every 120mm).
6
water condensation.
Rubber strap tied with great force
Pipe
THE CONNECTION OF REFRIGERATING PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
●
Refrigerating pipes and connecting cord must be
tied together.
●
The front part of the refrigerating pipes are
at locations marked with “ ” symbol.
!
CAUTION
●
Please fix in the plastic
core after flaring to avoid
plastic chips entering the
pipes.
INDOOR UNIT
Procedures of Installation and Precautions
●
Procedures to fix 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 figure below)
Wall
1 Hanger
2 Screw
Plug
above 50mm
Ceiling
ø4.8mm
32mm
●
Procedures to fix the holder of remote control.
Wall
4.1 x 32 Screw
1.Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
Wall
ø4.4mm
19mm
3
Remote
Control
Holder
Plug
5 Screw
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.
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Indoor
WALL
Protection
pipe
Seal with
putty
Sleeve of
protection
pipe
Outdoor
2~5mm
!
CAUTION
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.
●
Please use pliers to pull out the drain cap.
(This is an easier way to remove the drain cap).
Drain hoseDrain cap
Drain cap
●
Remove the cap for drain hose installation
!
CAUTION
Condensed water may leak out if not inserted properly.
Drain hose
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.
●
Pipe support
Transform after
bending downw
Transform the piping while holding down the lower
portion of pipe-support by hand.
Installation
0.85m
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.
●
Insulate the connecting portion of refrigerating pipe with
insulator.
●
Wrap the refrigerating pipes with insulation pipe.
●
Connect the connecting cord.
●
After adjustment, the connecting cord and refrigerating pipes
are placed into the space available under the cooling unit.
●
The projection of indoor unit must hook to the hanger.
Protection
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
3
Installation of Drain Hose
Ditch
Bending
upwards
!
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.)
Condensed
water pond
Condensed
water pond
pipe
Drain hose
Connecting cord
Temporary stand
Projection
about 15cm
Holder
CAUTION
Be sure that the
drain hose is not
loosely connected
or bent.
Hook
Connected
section
●
!
Brown=C
Brown=D
connect the
earth cord
White=B
White=A
After remove the band, place the
connecting cords and fix with screw
cords
with screws
!
Lo
Hi
Meter showing pressure
Manifold valve
Vacuum pump
Charge
hose
When pumping starts, slightly loosen
the flare nut to check of air sucked in.
Then tighten the flare nut.
When the meter reaches –101KPa (–76cmHg)
during pumping, fully tighten the shuttle.
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.
1
Preparation of Pipe
●
Use a pipe cutter to cut the copper pipe.
3
Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
Procedure to remove the
cover of wiring terminals
●
Remove the screw (1
piece).
●
Hold the projected
part at the lower left
of the cover and push
the cover upwards to
remove it.
●
To close the cover,
insert the upper part
Hook
of the cover into the
body of outdoor unit,
then be sure that the
hook below the cover
is plugged in before
screwing.
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
●
There are holes on the base of outdoor unit for condensed water to
exhaust.
●
In order for condensed water to flow to the draining part, installed the
unit on the level ground or block so that the unit is 70mm above the
OUTDOOR UNIT
ground, same as figure shown. Join the drain pipe to one hole.
Please face this side (suction side)
of the unit to the wall
Please remove
the cover for
wire connection.
Trimming tool
Copper pipe
!
CAUTION
●
Jagged edge will cause leakage.
●
Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
●
Before flaring, please put on the flare nut.
Die
A (mm)
Rigid flaring tool
A
Copper pipe
0 – 0.5
0 – 0.5
Outer
Diameter (ø)
6.35 (1/4")
9.52 (3/8")
2
Pipe Connection
Die
Imperial flaring tool
0.8 – 1.5
1.0 – 1.8
As shown in figure on the right, remove
the cap of valve head and valve core
1
and then connect them to the vacuum
pump and manifold valve.
Fully tighten the “Hi” shuttle of the
manifold valve and completely unscrew
the “Lo” shuttle. Run the vacuum pump
2
for about 10–15 minutes, then completely
tighten the “Lo” shuttle and switch off
the vacuum pump.
Completely unscrew the spindle of the
AIR REMOVAL
service valve (at 2 places) in anti-
3
clockwise direction to allow the flow of
coolant (using Hexagonal Wrench key).
Remove the Charge hose and tighten
the cap of valve head. The task is then
4
completed.
Adding Refrigerant
Cap of valve head
The body of
service valve
Cap of
valve core
Hexagonal
Wrench Key
Cap of valve head
●
Please be careful when bending the copper pipe.
●
Applied frozen grease to the connection points and then screw in manually. After
At first insert one portion of the hook to the base (Portion A), then pull
that, use a torque wrench to tighten the connection.
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 firmly.
A
BASE
Wrench
DRAIN PIPE
70mm ABOVE
9
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
12
●
WARNING
!
Power supply shall be connected at the rated voltage, otherwise the unit will be broken or could not
reach the specified capacity.
Procedures of Wiring
When power supplies to Indoor Unit
Line Cord
AC 220-240V
When power supplies to Outdoor Unit
Indoor Unit Outdoor Unit
Indoor Unit
L
N
DCBA DCBA
1.6 or 2.0
Connecting Cord
THIS APPLIANCE MUST BE EARTHED.
Outdoor Unit
2.0
Connecting Cord
1.6 or 2.0
AC 220 - 240V
DCBADCBA
Main
Switch
A, B C, D
Indoor
Unit
A, B C, D
Outdoor
Unit
GRN + YEL
Indoor
Unit
A, B C, D
Outdoor
Unit
10mm
45mm
GRN + YEL
70mm
10mm
10mm
30mm
10mm
30mm
50mm
45mm
Strip Wires
10mm
Strip Wires
GRN + YEL
10mm
GRN + YEL
26mm
10mm
GRN + YEL
30mm
10mm
C, D
10mm
45mm
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.
Outer
diameter
of pipe
Flare nut
Torque
wrench
Small diameter
side
Big diameter
side
Valve head cap
Valve core cap
6.35 (1/4")
9.52 (3/8")
13.7 – 18.6 (140 – 190)
34.3 – 44.1 (350 – 450)
19.6 – 24.5 (200 – 250)
12.3 – 15.7 (125 – 160)
Wiring Of The Indoor Unit
●
For wire connection of the indoor unit, you need to remove the cover under the body
of the unit and front cover.
Method to remove the low cover
●
Pull the cover at 1 and 2 in
the directions as shown by
arrows to remove the cover.
1
2
Wiring Of The Outdoor Unit
●
Please remove the side cover for wire connection.
If the length of the copper pipe is over 5m, add 15g/m refrigerant.
Gas Leakage Inspection
Torque N.m
●
(kgf
cm)
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.
!
CAUTION
In case of removing Flare nut of a cooling unit, first remove a nut of
small diameter side, or a seal cap of big diameter side will fly out.
When power supplied to outdoor unit
●
Power cannot be turned off using power
switch.
Always keep the switch “OFF” and put
the power switch fixing seal so that the
power cannot be turned off.
●
Power cord is not necessary, store
it in the lower-side space on the rear
side of indoor unit. When storing, wrap
the power plug with the vinyl bag for
the parts, etc. and seal with adhesive
tape to prevent dust or dirt.
●
Terminal A and B of indoor unit do not need to be connected.
●
When power supplied to outdoor unit, power is not turned off
by switching the power of indoor unit to “OFF”. In that case,
please cut the breaker.
11
Seal
ABCD
●
The naked part of the wire core should be 10 mm and the insulated part of the wire must be push into the terminal for 3 – 4 mm.
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 wire specified for the use of air-conditioner.
●
Please refer to the installation manual for wire connection and the wiring technique should meet the standards of electrical
installation.
●
There is a AC voltage drop between the LN terminals if the power is on. Therefore, be sure to remove the plug from its socket.
How to Remove the Front Cover
CONNECTION OF POWER CORD
●
Open the cover 1 and remove the screw.
●
After open the Front Panel and remove the filter, release the axis by
pulling the center portion of front cover in the direction of arrow 2.
●
Push vertical air deflector handle to the right or left side.
●
After raise the front cover from bottom side as 3, release the front
cover by pull the right or left sides as 4.
How to Install the Front Cover
●
Insert the two hooks 5 at the upper side certainly.
●
Open Front Panel, push the center down in the direction of the arrow
to insert the axis at the center of the front cover into the hook at the
outlet frame.
●
Fixed the screw and cover 1.
!
WARNING
Front Panel
1
Cover
2
Screw
5
1
Vertical Air Deflector Handle
1
3
5
2
●
You may not be able to close the side cover
due to the connecting cord, under such
Side cover
situation, please press against the wait of
side cover to fix it.
Connection cord
WARNING
●
Be sure that the hooks (2 places) are
plugged in.
Connection cord
is put under here
Otherwise, water leakage may occur and this
causes short circuit or faults.
Checking for the electric source
Front Cover
4
1
2
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 leadin 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.
IMPORTANT
Wire length
up to 16m
up to 15m
up to 25m
Wire gauge
1.6mm
2.5mm
4.0mm
2
2
2
●
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.
●
Install outlet for the room air conditioner within the reaching
range of the line cord.
IMPORTANT
Fuse Capacity
16A time delay fuse
1
Insulation And Maintenance Of Pipe Connection
●
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 figure showing the installation of indoor and
outdoor units. Then fix 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.
FINAL STAGE OF INSTALLATION
Insulation material for pipe connection
Sleeve of
protection pipe
Putty
2
Installation Of Remote Control
●
The remote controller can be placed in its holder which is
fixed 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 fixed. The unit will beep
when signal is received from the remote controller. The signal
transmission is weaken by the florescent 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.
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 figure below.
Screw (2 pieces)
Holder for
Remote Controller
Remote
Controller
3
Power Source And Operation Test
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 fix 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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