Hitachi RAS 14KH2 User Manual

THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).  
FOR SERVICE PERSONNEL ONLY  
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WARNING  
WARNING  
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The unit should be mounted at stable, non-vibratory location which  
can provide full support to the unit.  
The Outdoor unit must be mounted at a location which can sup-  
port heavy weight. Otherwise, noise and vibration will increase.  
Carefully read through the procedures of proper  
installation before starting installation work.  
The sales agent should inform customers regarding  
the correct operation of installation.  
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CAUTION  
CAUTION  
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Do not expose the unit under direct sunshine or rain. Besides, ventilation  
must be good and clear of obstruction.  
No nearby heat source and no obstruction near the air outlet is  
SPLIT UNIT AIR CONDITIONER  
INSTALLATION MANUAL  
allowed.  
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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.  
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.  
Tools Needed For Installation Work  
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  
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.  
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– Screwdriver  
Measuring Tape  
Knife  
+
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Saw  
ø 65mm Power Drill Hexagonal Wrench  
Indoor Unit  
Outdoor Unit  
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Key (  
4mm)  
Wrench (14, 17, 22mm)  
Gas  
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Leakage Detector  
Pipe Cutter  
Putty  
Vinyl  
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RAS-14KH2  
RAC-14KH2  
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Tape  
Pliers  
Flare Tool  
The installation height of indoor unit must be 2.3m or more in a  
non public area.  
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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.  
Do not install outdoor unit facing strong wind direction. It may damage the  
fan motor.  
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Names of Indoor Components  
!
The Length of Indoor Unit  
Connecting Cord  
CAUTION  
Figure showing the Installation  
of Indoor and Outdoor Unit.  
No.  
Item  
Qty  
WARNING ........ Incorrect methods of installation may cause death or serious injury.  
CAUTION ......... Improper installation may result in serious consequence.  
!
!
The installation height  
of indoor unit must be  
2.3m or more in a non  
public area.  
Hanger  
0.8m  
1.5m  
1
1
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.  
Direction of Piping  
Screw for Hanger  
(4.1x32)  
6
1
Horizontally  
perpendicular  
to the unit  
!
WARNING  
Holder for Remote  
Controller  
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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.  
Connection  
3
4
Be sure to  
completely  
seal any  
gap with  
putty.  
There are  
4
directions  
above 50mm  
2
allowed, namely, horizontally  
perpendicular to the unit,  
vertically down from right,  
horizontally out from right and  
horizontally out to left.  
1
Please observe the instructions stated in the installation manual during the process of installation. Improper installation may  
cause water leakage, electric shock and fire.  
above 100mm  
AAA Size Battery  
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.  
2
2
Don’t form the piping  
downward at the left of the unit.  
Screw for holder of  
Remote Controller  
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.  
above 100mm  
6
Dimension of Mounting Stand  
of the Outdoor unit  
2,300mm or more  
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.  
(3.1x16)  
Remote Controller  
(unit : mm)  
mounting stand  
57  
1
1
1
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Please use the specified components for installation work. Otherwise, the units may collapse or water leakage, electric shock  
and fire may occur.  
Purifying Filter  
G
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Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.  
6
12  
35  
4
7
500  
124  
5
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.  
The indoor piping should be  
3
insulated with the enclosed  
insulation pipe. (If the  
insulator is insufficient,  
please use commersial  
products).  
Plug  
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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.  
Holder  
8
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.  
G The difference in height  
between the indoor and  
outdoor unit should be  
kept max 5m.  
G 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).  
above 200mm  
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.  
above 50mm when  
installed on the  
Names of Outdoor Components  
)
(
above 100mm  
ceiling of balcony  
No.  
Item  
Qty  
give clearance as  
wide as possible  
Bush  
!
CAUTION  
9
2
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A circuit breaker or fuse 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.  
above 100mm  
Drain Pipe  
above 200mm  
The connection of insulated  
drain hose.  
1
0
1
1
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.  
inner diameter ø 16mm  
above 700mm  
Bush  
G
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Please ensure smooth flow of water when installing the drain hose.  
11  
Please use insulated drain  
hose for the indoor piping  
(commercial product).  
Piping shall be suitable supported with a maximum spacing of 1m between the supports.  
INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION  
1
Installation of Hanger, Wall Penetration and Installation of Protection Pipe  
2
Installation of the Indoor Unit  
G
The refrigerating pipes should be adjusted to fit into  
Drain hose  
the hole on the wall and then ready for further  
VERTICALLY DOWNWARD PIPING  
!
CAUTION  
connection.  
Preparation  
G
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, fit the connecting cord and pipes  
into the space available under the indoor unit. Use  
holder to hold them tight.  
G
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.  
Connecting  
cord  
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Connect connecting cord.  
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Pull out the pipe, connecting cord and drain hose.  
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Pipe  
Connecting cords, pipe and  
drain hose must be laid  
together with Vinyl tape.  
Direct Mounting On The Wall  
Installation  
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Please use hidden beams in the wall to hold the hanger.  
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The upper part of the Indoor unit is hanged on the hanger.  
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CAUTION  
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The projection at the lower part of the Indoor unit is hooked onto the hanger.  
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200mm  
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.  
125mm  
Hanger  
Hanger  
1
!
Lift the body  
of the unit  
upwards and  
then force it  
downwards.  
CAUTION  
125mm  
Refrigerating  
Pipe  
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.  
8
Holder  
Insulation pipe (must be wrapped with  
vinyl tape at every 120mm).  
80mm  
45mm  
60mm  
45mm  
115mm  
2
G
Holder can be attached at the either of 2 places.  
Please select the easier position.  
Protection  
Pipe  
Level  
780mm  
Pipe  
Rubber strap tied with great force  
Connecting  
Cord  
Drain Hose  
Projection  
Hanger  
THE CONNECTION OF REFRIGERATING PIPE DURING THE  
INSTALLATION OF INDOOR UNIT  
450mm  
HOW TO REMOVE INDOOR UNIT  
Mark  
Preparation To Install Refrigerating Pipes  
!
CAUTION  
Screw for Hanger  
G
Push up the (PUSH) sections at the  
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The refrigerating pipes and connecting cord  
transform and are attached.  
The end of the refrigerating pipes are at locations  
marked with symbol.  
G
Please fix in the plastic core  
after flaring to avoid plastic  
chips entering the pipes.  
Please use more  
than 4 screws.  
Line  
Weight  
bottom of the indoor unit and pull the  
bottom plate towards you. Then the  
claws are released from the stationary  
plate.  
Hole for pipe  
(The (PUSH) sections are indicated by  
2 arrows in the right figure)  
Procedures of Installation and Precautions  
[Push] mark positions  
G
Procedures to fix the hanger.  
below  
5mm  
1.Drill holes on wall.  
(As shown below)  
2. Push plug into the holes.  
(As shown below)  
3. Fix the hanger on wall  
with 4.1 x 32 screw  
(As shown in figure below)  
Ceiling  
Please bend at a small  
radius to form an arc  
HORIZONTAL PIPING  
Preparation  
0.85m  
Wall  
above 50mm  
1
Hanger  
Screw  
Installation  
Plug  
Change of Drain Hose and Installation Procedures.  
2
G
Exchange the location of drain hose and drain cap during horizontal piping as shown in  
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  
Projection  
figure below. Be sure to plug in the drain hose until the insulating material folds upon itself.  
Hook  
G
Please use pliers to pull out the drain cap.  
32mm  
G
Wall  
(This is an easier way to remove the drain cap).  
4.1 x 32 Screw  
G
connecting refrigerating pipe.  
G
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.  
G
Procedures to fix the holder of remote control.  
1.Drill holes on wall.  
(As shown below)  
2. Push plug into the holes.  
(As shown below)  
about 15cm  
G
Wall  
G
The projection of Indoor unit must hook to the hanger.  
3
Remote  
Control  
Holder  
Drain cap  
Drain hose  
Heat insulation pipe  
Protection pipe  
Drain hose  
Pull this to the front  
during the connection  
of refrigerating pipes  
to ease task.  
5
Screw  
Connecting  
cord  
20mm  
Plug  
Drain cap  
Drain hose  
Connecting cord  
Refrigerating pipe  
Please insert  
until here  
Please insert  
until here  
Connected section  
Holder  
Wall Penetration and Installation of Protection Pipe  
G
Drill a ø 65mm hole on  
3
Installation of Drain Hose  
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.  
Indoor  
Outdoor  
2 ~ 5mm  
!
WARNING  
Condensed water may leak out if not inserted properly.  
!
CAUTION  
Seal with  
putty  
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.  
Seal with  
putty  
HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS  
!
CAUTION  
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During horizontal or downward piping, use a knife to cut  
openings as shown in figure. Then smoothen the edges of  
openings with a file.  
Be sure that the  
drain hose is not  
loosely connected  
or bend.  
Condensed  
water pond  
Ditch  
Pipe  
support  
Openings  
WALL  
Condensed  
water pond  
Bending  
upwards  
Protection  
pipe  
Sleeve of  
protection  
pipe  
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.)  
!
G
Turn the piping while holding down the lower  
portion of pipe-support by hand.  
Pull up the pipe after  
bending downward  
CAUTION  
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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.  
1
Preparation of Pipe  
3
Removal Of Air From The Pipe And Gas Leakage Inspection  
G
Use a pipe cutter to cut the copper pipe.  
Procedures of using Vacuum Pump for Air Removal  
When the meter reaches - 101KPa  
(-76cmHg) during pumping, fully  
Trimming tool  
As shown in right figure, 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.  
tighten the shuttle.  
Copper pipe  
Meter showing pressure  
e (suction  
he wall.  
Closed  
1
2
Lo  
Hi  
R410A  
Manifold valve  
se remove side cover  
n connecting the piping  
connecting cord.  
Charge hose  
!
CAUTION  
Valve  
Vacuum  
pump  
Valve  
G
G
Jagged edge will cause leakage.  
Point the side to be trimmed downwards during trimming to prevent copper  
chips from entering the pipe.  
Vacuum pump  
adapter  
downward  
Fully tighten the “Hi” shuttle of the  
manifold valve and completely unscrew  
the “Lo” shuttle. Run the vacuum pump  
for about 10–15 minutes, then completely  
tighten the “Lo” shuttle and switch off  
the vacuum pump.  
G
Before flaring, please put on the flare nut.  
Die  
Die  
A
G
Please use exclusive  
tool  
When pumping starts, slightly loosen the  
flare nut to check of air sucked in. Then  
tighten the flare nut.  
Copper pipe  
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT  
There are holes on the base of Outdoor unit for condensed  
A (mm)  
For R410A tool  
Outer  
Diameter (mm)  
Completely unscrew the spindle of the  
service valve (at 2 places) in anti-  
clockwise direction to allow the flow of  
coolant (using Hexagonal Wrench key).  
For R22 tool  
1.0mm  
water to exhaust.  
The body of  
service valve  
0.0  
0.0  
0.5mm  
0.5mm  
6.35  
9.52  
3
4
~
~
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.  
1.0mm  
Cap of  
valve core  
Hexagonal  
Wrench Key  
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  
into the base. After installation, check whether the drain pipe cling to the  
2
Pipe Connection  
Cap of valve head  
Remove the charge hose and tighten the  
cap of valve head. Check the cap’s  
periphery if there is any gas leakage.  
The task is then completed.  
base firmly.  
In case of removing flare nut of an Indoor unit, first remove a nut  
of small diameter side, or a seal cap of big diameter side will fly  
out. Prevent water from entering into the piping when working.  
!
CAUTION  
A
Cap of valve head  
BASE  
G
G
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.  
11  
DRAIN PIPE  
BUSH  
9
BUSH  
Gas Leakage Inspection  
10  
DRAIN PIPE  
Outer  
dia.of pipe  
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.  
Flare nut  
Small dia. side  
Large dia. side  
6.35 (1/4")  
13.7 18.6 (140 190)  
When using in cold region, etc.  
9.52 (3/8") 34.3 44.1 (350 450)  
In cold region with severe cold climate and heavy snow, water  
discharged from heat exchanger freeze on the base surface and this  
may affect drainage. In such a region, remove bush on the bottom face  
of outdoor unit for better drainage. When using drainpipe, consult our  
dealer.  
19.6 24.5 (200 ~ 250)  
19.6 24.5 (200 ~ 250)  
12.3 15.7 (125 ~ 160)  
6.35 (1/4")  
9.52 (3/8")  
Small dia. side  
Large dia. side  
Valve  
head cap  
Wrench  
Torque  
wrench  
If gas leakage occurs, further tighten the connection  
to stop leakage.  
Valve core cap  
Wiring Of The Indoor Unit  
G
THIS APPLIANCE MUST BE EARTHED.  
WARNING  
!
G
For wire connection of the Indoor unit, you need to remove low cover and front cover.  
Procedures of Wiring  
Method to remove front cover.  
G
Refer to FINAL STAGE OF INSTALLATION How to Remove The Front Cover.  
In case that power is supplied from Indoor Unit  
Method to remove the low cover  
Indoor Unit  
Outdoor Unit  
A B C D  
Line Cord  
L
G
Pull the cover at  
remove the cover.  
and  
in the directions as shown by arrows to  
N
A B C D  
2.0  
AC 220-240V  
Connecting Cord  
1.6 or 2.0  
After remove the screw  
and cover, and put the  
connecting cords and fix  
the cover with screw.  
Power line  
Control line  
30mm  
10mm  
30mm  
10mm  
Wiring of The Outdoor Unit  
G
Please remove the side cover for wire connection.  
Indoor  
Unit  
G
If you cannot attach the side cover due to the connecting  
cord, press 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.)  
terminal  
10mm  
70mm  
GRN + YEL  
G
G
!
WARNING  
Strip wires  
25mm  
25mm  
10mm  
Outdoor  
Unit  
10mm  
Checking for the electric source and  
the voltage range  
G
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.  
10mm  
35mm  
GRN + YEL  
G
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.  
!
WARNING  
G
G
G
G
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 3x1.5mm2.  
IMPORTANT  
Cable length  
Wire cross-section  
Please refer to the installation manual for wire connection to the terminals of the units. The cabling must  
meet the standards of electrical installation.  
IMPORTANT  
up to 16m  
up to 15m  
up to 25m  
1.6mm2  
2.5mm2  
4.0mm2  
Fuse Capacity  
There is an AC voltage drop between the L and N terminals if power is on. Therefore, before servicing,  
be sure to remove the plug from the AC outlet or switch off the main switch.  
15A time delay fuse  
How to Attach the Front Cover  
1
Insulation And Maintenance Of Pipe Connection  
How to Remove The Front Cover  
2
Installation Of Remote Controller  
G
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.  
G
The remote controller can be placed in its holder which is  
fixed on wall or beam.  
1
2
Check that the drain pan is securely attached.  
1
Remove the front panel.  
G
Please remove and attach the front panel by both hands.  
G
G
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.  
After installing the front cover onto the unit, hook three  
claws at upper side of the cover securely. Then, push the  
center of the front cover to lock the claws.  
G
G
3
Tighten the two screws.  
Completely seal any gap with putty.  
Insulation material for pipe connection  
G
After opening the front panel by both hands.  
Undo the right arm while pushing it inside.  
1
The controller must  
be hooked onto the  
hook at the lower  
Slide the front panel to right as shown in figure. Then  
remove while pulling it to front.  
Sleeve of  
protection pipe  
Screw (2 pieces)  
part of the holder.  
2
Remove the filters.  
Putty  
4
5
Install the filter.  
Push in the remote  
controller in the  
direction as shown  
3
After removing two screws, pull the center of the front  
cover towards you and release the claws.  
Slide the shafts of the right and left arms on the washable  
panel along the steps to insert the shafts into the holes till  
they stop. After checking that the shafts are securely  
inserted, close the panel.  
Holder for  
Remote Controller  
in figure below.  
4
Pull the side faces (lower sections) of the front cover  
towards you as shown in the figure and remove the  
cover.  
Putty  
Remote  
Controller  
Shaft  
3
Power Source And Operation Test  
Operation Test  
Power Source  
G
Please ensure that the air conditioner is in normal  
operating condition during the operation test.  
!
CAUTION  
Hole  
Step  
G
G
G
G
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.  
G
Explain to your customer the proper operation  
procedures as described in the user’s manual.  
<
I909: A  
>

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