Hitachi RAS-18GH4, RAC-18GH4 Installation Manual
FOR SERVICE PERSONNEL ONLY
0.9m
1.6m
Connection
Horizontally
perpendicular
to the unit
57
12
35
198
508
320
10
20
(10)
340
mounting stand
!
!
!
Screw driver
Claw of indoor unit
Circle hole
2
1
Drain cap
Please insert
until here
Drain hose
Please insert
until here
Openings
Insulation pipe (must be wrapped with
vinyl tape at every 120mm).
Holder
Pipe
Rubber strap tied with great force
below
5mm
Please bend at a small
radius to form an arc
●
Carefully read through the procedures of proper
installation before starting installation work.
●
The sales agent should inform customers regarding
the correct operation of installation.
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-18GH4 RAC-18GH4
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.
!
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 power cables approved by the authorities of your country.
●
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.
●
Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.
●
When installing or removing an air conditioner, only specified 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 fire, 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 fire in the fan-driven heater, space heater, etc., a poisonous gas may occur.
●
Unauthorized modifications to the air conditioner may be dangerous. If a breakdown occurs please call a qualified air conditioner
technician or electrician. Improper repairs may result in water leakage, electric shock and fire, etc.
!
CAUTION
●
A circuit breaker or fuse (20A 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 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.
●
Piping shall be suitable supported with a maximum spacing of 1m between the supports.
Tools Needed For Installation Work
●
+ – Screwdriver
●
Saw ● ø 65mm Power Drill ● Hexagonal Wrench
●
Measuring Tape
Key ( 4mm) ● Wrench (14, 17, 24mm)
Leakage Detector
●
Pipe Cutter
●
Tape ● Pliers ● Flare Tool
Putty
●
Knife
●
Gas
●
Vinyl
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.
●
To avoid interference from noise please place the unit and its
remote controller at least 1m from the radio, television and inverter
INDOOR UNIT
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.
Names of Indoor Components
QtyNo. Item
Hanger
1
Screw for Hanger
2
Holder for Remote
Controller
3
AAA Size Battery
4
Screw for holder of
Remote Controller
5
Insulation pipe
6
Remote Controller
7
Purifying Filter
8
(4.1x32)
(3.1x16)
1
6
1
2
2
1
1
1
Names of Outdoor Components
QtyNo. Item
Bush
9
Drain Pipe
0
Bush
!
3
1
1
The Length of Indoor Unit
Connecting Cord
Direction of Piping
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.
Dimension of Mounting Stand
of the Outdoor unit
(unit : mm)
above 100mm
above 700mm
Figure showing the Installation
of Indoor and Outdoor Unit.
Be sure to
completely
seal any
gap with
putty.
above 200mm
above 50mm when
installed on the
(
ceiling of balcony
●
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.
●
Do not install at a location where there is flammable gas, steam, oil and
smoke.
OUTDOOR UNIT
●
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.
!
CAUTION
In case the pipe length is more than 8m, add refrigerant R410A
at 15 gram per every meter exceeds. However, pipe length shall
not exceed 15m.
above 100mm
above
0.45m
must not bend
above 300mm
Maximum pipe length 15m
Minimum pipe length 5m
)
above 100mm
above 200mm
!
WARNING
!
CAUTION
above 50mm
3
Plug
give clearance as
wide as possible
The installation height
•
of indoor unit must be
2.3m or more in a non
public area.
1
2,300mm or more
7
4
5
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).
● The difference in height
between the indoor and
outdoor unit should be
kept max 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).
CAUTION
2
above 100mm
inner diameter ø 16mm
1
Installation of Hanger, Wall Penetration and Installation of Protection Pipe
●
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.
200mm
45mm
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
Wall
ø4.8mm
INDOOR UNIT
●
Procedures to fix the holder of remote control.
1.Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
Wall
ø4.4mm
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.
<
I548: A
ø 65mm
32mm
20mm
>
30mm
1030mm
!
CAUTION
External dimension of
indoor unit
80mm
Drain Hose
1 Hanger
2 Screw
Wall
3
Remote
Control
Holder
Seal with
putty
Protection
pipe
180mm
45mm
180mm
WALL
298mm
Hanger
Screw for Hanger
Please use more
than 4 screws.
Plug
5 Screw
Plug
OutdoorIndoor
2 ~ 5mm
Seal with
putty
Sleeve of
protection
pipe
Line
Weight
(As shown in figure below)
Ceiling
above 50mm
4.1 x 32 Screw
!
WARNING
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.
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.
Connecting cords,
pipe and drain hose
must be tied together
with Vinyl tape.
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
CAUTION
Protection
Pipe
Drain Hose
Refrigerating
Pipe
Connecting
Cord
Lift the body
of the unit
upwards and
then force
it downwards.
Projection
Hook
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.
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.
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).
Drain hoseDrain cap
!
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 figure. Then smoothen the edges of
openings with a file.
Pipe
support
●
Pull up the pipe after
bending downward
Turn the piping while holding down the lower
portion of pipe-support by hand.
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
Drain hose
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, fit the connecting cord and pipes
into the space available under the indoor unit. Use
holder to hold them tight.
Pipe
Connecting cord
!
CAUTION
●
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.
●
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
●
The refrigerating pipes and connecting cord
transform and are attached.
●
The end of the refrigerating pipes are at locations
marked with “ ” symbol.
0.65m
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.
Heat insulation pipe
Protection
Connecting
cord
Refrigerating pipe
3
Installation of Drain Hose
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
!
CAUTION
●
Please fix in the plastic core
after flaring to avoid plastic
chips entering the pipes.
Temporary stand
Projection
about 15cm
pipe
Drain hose
Connecting cord
Holder
Connected
section
CAUTION
Be sure that the
drain hose is not
loosely connected
or bend.
Bending
upwards
!
CAUTION
Condensed
water pond
Condensed
water pond
Ditch
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.)
●
Lo Hi
Sleeve of
protection pipe
Putty
Putty
Insulation material for pipe connection
ABCD
ON
OFF
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.
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
Preparation of Pipe
1
●
Use a pipe cutter to cut the copper pipe.
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
Die
A
Copper pipe
●
Recommend to use
R410A flaring tool.
3
Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
When the meter reaches - 101KPa
As shown in right figure, remove the cap
of valve core. Then, connect the charge
hose. Remove the cap of valve head.
1
Connect the vacuum pump adapter to
the vacuum pump and connect the
charge hose to the adapter.
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.
(-76cmHg) during pumping, fully
tighten the shuttle.
Valve
When pumping starts, slightly loosen the
flare nut to check of air sucked in. Then
tighten the flare nut.
Meter showing pressure
Charge hose
Vacuum pump
adapter
Valve
Closed
R410A
Manifold valve
Vacuum
pump
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There are holes on the base of Outdoor unit for condensed
water to exhaust.
In order to flow 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
figure. Join the drain pipe to one hole.
At first 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
OUTDOOR UNIT
into the base. After installation, check whether the drain pipe cling to the
base firmly.
A
BASE
DRAIN PIPE
When Using and Installing In Cold Areas
100 mm ABOVE
9
BUSH
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.
11
10
DRAIN PIPE
BUSH
Outer
Diameter (mm)
6.35
9.52
12.7
2
Pipe Connection
Imperial flaring tool
0.5mm
0.0
~
0.0
0.5mm
~
0.0
0.5mm
~
A (mm)
Rigid flaring tool
1.0mm
1.0mm
1.0mm
In case of removing flare nut of an Indoor unit, first remove a nut
!
CAUTION
of small diameter side, or a seal cap of big diameter side will fly
out. Prevent water from entering into the piping when working.
●
Please be careful when bending the copper pipe.
●
Screw in manually while adjusting the center. After that, use of torque wrench to
tighten the connection.
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
Wrench
Flare nut
Torque
wrench
Small dia. side
Large dia. side
Valve
head cap
Valve core cap
Small dia. side
Large dia. side
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
Torque N·m
(kgf · cm)
13.7 – 18.6 (140 – 190)
34.3 – 44.1 (350 – 450)
44.1 – 53.9 (450 – 550)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
29.4 – 34.3 (300 – 350)
12.3 – 15.7 (125 ~ 160)
AIR REMOVAL
Completely unscrew the spindle of the
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. Check the cap’s
4
periphery if there is any gas leakage.
The task is then completed.
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. (Use the detector provided for
R410A)
Cap of valve head
The body of
service valve
Cap of
valve core
Hexagonal
Wrench Key
Cap of valve head
●
WARNING
!
THIS APPLIANCE MUST BE EARTHED.
Procedures of Wiring
In case that power is supplied from Indoor Unit
Indoor Unit
Line Cord
AC 220-240V
Indoor
Outdoor
CONNECTION OF POWER CORD
●
The naked part of the wire core should be 10 mm and fix 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
●
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.
Unit
Unit
GRN + YEL
L
N
Power line Control line
30mm
10mm
10mm
70mm
25mm
10mm
10mm
35mm
!
WARNING
2
, (fuse = 30A time delay)
Connecting Cord
Strip wires
Outdoor Unit
2.0
1.6 or 2.0
30mm
10mm
GRN + YEL
25mm
10mm
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 (A, B, C, D) from the bottom of unit.
●
Fixed the wire to terminal wires firmly as shown in figure at right side.
DCBADCBA
Electrical cover
Screw
AUTO
RESTART
SWITCH
Wiring of The Outdoor Unit
●
Please remove the side cover for wire connection.
●
If you cannot attach the side cover due to the connecting cord, press
!
WARNING
the connecting cord in direction to the front panel to fix it.
●
Be sure that the hooks of the side cover is fixed 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.)
Screw
AUTO
RESTART
SWITCH
Connect the
earth cord
After remove the screw
and band, put the
connecting cords and fix
the band with screw.
CD
B
A
Earth terminal
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.
IMPORTANT
Cable length
up to 16m
up to 15m
up to 25m
Wire cross-section
1.5mm
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 outdoor. In localities
where electrical conditions are poor, use of a voltage regulation is
recommended.
IMPORTANT
Fuse Capacity
20A 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.
3
Power Source And Operation Test
Power Source
FINAL STAGE OF INSTALLATION
●
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.
!
CAUTION
2
Installation Of Remote Controller
●
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 fluorescent 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.
Screw (2 pieces)
Push in the remote
controller in the
direction as shown
in figure below.
Remote
Controller
Holder for
Remote Controller
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.
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.
11
1
Undo the right arm while pushing it inside.
11
22
2
Slide the front panel to right as shown in figure. Then
22
remove while pulling it to front.
2 Remove the filters.
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 deflector.
5 Remove while pulling the front cover in direction to arrow
as shown in figure to hold the both sides of front cover.
2
Cap
Screw
Lower portion of front cover
1
Deflector
How to Attach the Front Cover
11
1
After covering the front cover to the unit, certainly hook at
11
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.
22
2
Fix the front cover at lower portion by screws and attach
22
the caps.
33
3
Attach the front panel.
33
●
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.
44
4
Attach the filters which are placed the surface written
44
“FRONT” up.
●
After attaching the filters, push the front panel at three
arrow portion as shown in figure and close it.
Hole
Shaft
Guide
<
I548: A
>
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