Hitachi RAS-S18CDT, RAC-S18CDT Users Manual
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-S18CDT RAC-S18CDT
● 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
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 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.
FOR SERVICE PERSONNEL ONLY
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 and front 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.
●
Do not install the outdoor unit in a place where small animals may build
their nests. If small animal goes inside the unit and touches the electrical
parts, failure of the unit, smoke or fi re may be caused. Request your
customer to keep the surrounding of the unit is clean.
INDOOR UNIT
Names of Indoor Components
Mounting Plate
QtyNo. Item
The Length of Indoor Unit
Connecting Cord
Figure showing the Installation of Indoor and
Outdoor Unit.
OUTDOOR UNIT
1
Screw for holder of
Remote Controller
(3.1x16)
AAA Size Battery
Holder for Remote
Controller
(4.1x32)
Remote Controller
Purifying Filter
6
1
2
2
1
1
● 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).
Screw for Mounting Plate
Installation of Mounting Plate, Wall Penetration and Installation of Protection Pipe
1
CAUTION
!
● The draining of the water container inside the indoor unit can be done from the left.
Therefore the mounting plate must be fi xed horizontally or slightly tilted towards the
side of drain hose. Otherwise, condensed water may overfl ow the water container.
Direct Mounting On The Wall
● Please use hidden beams in the wall to hold the mounting plate.
Wall Penetration and Installation of Protection Pipe
● Drill a ø 80mm 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
DIRECTLY BACKWARD AND DOWNWARD PIPING
Preparation
● Connect connecting cord.
● Pull out the pipe, connecting cord and drain hose.
● Arrange a drain hose in lowest part of a wall hole.
Installation
● The upper part of the Indoor unit is hanged on
the mounting plate
● The projection at the lower part of the Indoor unit
is hooked onto the mounting plate.
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 are
attached.
● The end of the refrigerating pipes are at locations
marked with “ ” symbol.
Installation of Drain Hose
3
INDOOR UNIT
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Heat insulation pipe
Connecting
cord
Refrigerating pipe
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
●
In case the pipe length is more than 8m, add refrigerant R22
at 15 gram per every meter exceeds. However, pipe length
shall not exceed 20m.
●
Installation of pipe length less than minimum pipe length
requirement (4 meters) may generate an abnormal sound.
!
CAUTION
Dimension of Mounting Stand
of the Outdoor unit
Please pull the lower part of
the Indoor unit outwards to
check if the unit is hooked
onto the mounting plate.
Improper installation may
cause vibration and noise.
!
CAUTION
Layout of pipe
Layout of pipe
1
2
3
4
5
6
7
Procedures of Installation and Precautions
● Procedures to fi x the mounting plate.
1. Drill holes on wall. 2. Push plug into the holes. 3. Fix the mounting plate on wall
(As shown below) (As shown below) with 4.1 x 32 screw
(As shown in fi gure below)
● Procedures to fi x the holder of remote control.
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
●
+ – 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
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 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.
Direction of Piping
There are 6 directions
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right,
horizontally out to left,
horizontally out to right,
vertically down from left.
HOW TO REMOVE INDOOR UNIT FROM MOUNTING PLATE
● Push up PUSH section on the bottom of indoor
unit, then claws are released from hanger.
(Indicated by 2 arrows in the drawing on the
right.)
HORIZONTAL PIPING
Preparation
Change of Drain Hose and Installation Procedures.
● Exchange the location of drain hose and drain cap during horizontal piping as shown
in fi gure below. Be sure to plug in the drain hose until the insulating material folds
upon itself.
● Please use pliers to pull out
the drain cap.
(This is an easier way to
remove the drain cap).
!
CAUTION
Condensed water may leak
out if not inserted properly.
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 pipesupport by hand.
Installation
Hang the Indoor unit onto the mounting plate. Use the temporary
stand at the back of the Indoor unit to push its lower part
15cm forwards.
●
Place the drain hose through the hole on the wall.
●
Wrap the refrigerating pipes with insulation pipe after
connecting refrigerating pipe.
●
Connect the connecting cord after removing electrical cover.
(Refer to “Connection of Power Cord”)
●
After adjustment, the connecting cord and refrigerating pipes
are placed into the space available under the Indoor unit.
Use holder to hold them tight.
●
The projection of Indoor unit must hook to the mounting plate.
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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
Installation Of Remote Controller
2
● 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.
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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.
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
!
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 penetration 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
, (fuse = 16A 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.
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.
IMPORTANT
● 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
● 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.
WARNING
!
In case that power is supplied from Indoor Unit
● Please use exclusive
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.
Power line
Indoor Unit
Outdoor Unit
GRN + YEL
GRN + YEL
Strip wires
Fuse Capacity
20A time delay fuse
How to Attach the Front Cover
1 After covering the front cover to the unit, certainly hook
at the upper portion (four places). Then, check that the
drain pan is certainly attached. Push the front cover in
the direction of arrow at the
portion of hooks.
2 Hook the front cover at lower portion to the drain pan and
then fi x them by screws and attach the caps.
3 Connect the wire connector, fi xed the screw and electrical
cover.
4 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.
5 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.
Hole
Guide
Shaft
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) from the bottom of unit.
● Fixed the wire to terminal wires fi rmly as shown in fi gure at right side.
Screw
Electrical cover
Screw
How to Remove The Front Cover
1 Open the front panel.
● Please remove and attach the
front panel by both hands.
● After opening the front panel by both hands.
1 Undo the right arm while pushing it inside.
2 Slide the front panel to right as shown in fi gure. Then
remove while pulling it to front.
3 Remove the screw and electrical cover.
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.
Cap
Screw
Lower portion of front cover
Defl ector
Removal Of Air From The Pipe And Gas Leakage Inspection
3
AIR REMOVAL
A
B
Earth terminal
Procedures of using Vacuum Pump for Air Removal
● How to check pipe bending.
– Compare bended pipe with the picture below.
– If bended pipe is not good enough, cut bended area
and bend it again.
a all areas are smooth, no notching area
b no scratch or mark inside
c all have the same length
d phase of bending is too long
e slanting
f there are scratches around bending area
g crack
h different length
i sample of bending pipe cannot be used
CAUTION
Note:
● Outdoor supply cords shall not
be lighter than polychloroprene
sheathed fl exible cord with code
designation 60245 IEC 57.
!
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.
Power Source And Operation Test
3
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.
Connect the
earth cord
After remove the screw
and band, put the
connecting cords and fi x
the band with screw.
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
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.
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
Please make sure to remove all spacers inside the unit.
● Open the Top, Back, Side cover and Cabinet of the unit.
● Pull out the spacers inside.
(Spacers are only for transportation purpose).
If not remove, vibration and noise will occur.
Side cover
Back cover
!
Top cover
➤
Outer
Diameter (mm)
6.35
12.7
Imperial fl aring tool
0.8
~ 1.5mm
1.0
~ 2.0mm
Rigid fl aring tool
A (mm)
0 ~ 0.5mm
0
~ 1.0mm
Outer
dia.of pipe
6.35 (1/4")
12.7 (1/2")
6.35 (1/4")
12.7 (1/2")
Valve
head cap
Torque N·m
(kgf · cm)
13.7 – 18.6 (140 – 190)
44.1 – 53.9 (450 – 550)
19.0 – 21.0 (194 ~ 214)
24.0 – 26.0 (245 ~ 265)
9.0 (92)
Small dia. side
Large dia. side
Valve core cap
Small dia. side
Large dia. side
Top cover
Cabinet
CAUTION
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