Hitachi RAS-PH30HLT User manual

THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).
WARNING
!
●The unit should be mounted at stable, non-vibratory location
which can provide full support to the unit.
WARNING
●The outdoor unit must be mounted at a location which can support
heavy weight. Otherwise, noise and vibration will increase.
● 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 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.
INDOOR UNIT
Figure showing the Installation of Indoor and Outdoor Unit.
OUTDOOR UNIT
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.
Don’t form the piping downward at
the left of the unit.
Screw for Mounting Plate
(4.1x32)
Names of Indoor Components
Screw for holder of
Remote Controller
(3.1x16)
AAA Size Battery
Holder for Remote
Controller
Mounting Plate
QtyNo. Component’s Name
1
6
1
2
2
Remote Controller
Purifying Filter
1
2
3
4
5
6
7
1
2
< IA1890: B >
Installation of Hanger, Wall Penetration and Installation of Protection Pipe
1
CAUTION
!
●The draining of the water container inside the indoor unit can be done from the left.
Therefore the mounting plate 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 mounting plate.
Wall Penetration and Installation of Protection Pipe
●Drill a ø 65mm hole on
wall which is slightly tilted
towards the outdoor side.
Drill the wall at a small
angle.
●Cut the protection pipe
according to the wall
thickness.
●Empty gap in the sleeve
of protection pipe should
be completely sealed with
putty to avoid dripping of
rain water into the room.
INSTALLATION OF 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 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.
●
When connection is at left side, refrigerating pipe and
cabinet shall be tied together.
Failing to do so may cause the unit bottom side become
warping.
Excess binder shall be cut to prevent abnormal sound
and water dripping.
THE CONNECTION OF REFRIGERATING PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
●Please fix in the plastic core
after flaring to avoid copper
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 flow 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
dew may drop.
!
WARNING
●The refrigerating pipes and connecting cord
arrangement are attached.
●The end of the refrigerating pipes are at locations
marked with “ ” symbol.
Installation of Drain Hose
3
INDOOR UNIT
Heat insulation pipe
Connecting
cord
Refrigerating pipe
Pull this to the front
during the connection
of refrigerating pipes
to ease task.
Procedures of Installation and Precautions
●Procedures to fix 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 figure below)
●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)
Installation of the Indoor Unit
2
VERTICALLY DOWNWARD PIPING
Preparation
●Connect connecting cord.
●Pull out the pipe, connecting cord and drain hose.
Installation
●The upper part of the indoor unit is hanged on the mounting plate.
●The projection at the lower part of the indoor unit is hooked onto the mounting plate.
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
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).
Dimension of Mounting Stand
of the outdoor unit
(unit : mm)
●The difference in height
between the indoor and
outdoor unit should be
kept max 20m.
●The connecting pipe,
no matter big or small,
should all be insulated
with insulation pipe and
then wrapped with plastic
tape. (The insulator will
deteriorate if it is not
wrapped with tape).
The connection of insulated
drain hose.
Please use insulated drain
hose for the indoor piping
(commercial product).
The indoor piping
should be insulated
with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commercial
products).
Be sure to
completely
seal any
gap with
putty.
HOW TO REMOVE INDOOR UNIT
● Push up the (PUSH) sections at the bottom of the indoor unit and
pull the bottom plate towards you. Then the claws are released from
the stationary plate.
(The (PUSH) sections are indicated by 2 arrows in the right figure)
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.
●
The projection of Indoor unit must hook to the mounting plate.
!
!
● Selecting the installation location: Suitable location that will reduce the
impact from rain and direct sun that may affect the unit performance.
Besides that, ventillation must be good and clear of obstruction.
● The air blown out of the unit should not point directly to animals or plants.
● The clearances of the unit from top, left, right, front and back are 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 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 fire may be caused. Request your
customer to keep the surrounding of the unit is clean.
!
CAUTION
Condensed water may leak out if not
inserted properly.
●Remove the cap for
drain hose installation
Drain cap
Drain cap shall
be fully tightened
by pushing with
Hexagonal wrench
key when changing
location.
!
Protection pipe
Drain hose
Connecting cord
Connected section
Hook
Projection
about 15cm
below
5mm
Please bend at a small
radius to form an arc
Binder
Insulation pipe (must be wrapped with vinyl tape at every 120mm).
Drain
hose
Connecting
cord
Pipe
Connecting cords,
pipe and drain
hose must be laid
together with Vinyl
tape.
Mounting plate
Drain Hose
Protection
Pipe
Refrigerating
Pipe
Connecting Cord
Lift the body
of the unit
upwards and
then force it
downwards.
Mounting plate
Projection
Level
Mounting
plate
Hole for pipe
Line
Weight
Mark
Screw for Mounting Plate
Please use more than
4 screws.
Plug
Screw
Remote
Control
Holder
Wall
Wall
Wall
Mounting plate
Screw
Plug
4.1 x 32 Screw
Ceiling
Indoor Outdoor
WALL
Sleeve of
protection pipe
Protection
pipe
Seal with
putty
Seal with
putty
2 ~ 5mm
Drain hose
Please insert until here
Drain hose
Drain hose
Drain cap
[Push] mark positions
Bending upwards
Condensed water pond
Ditch Condensed
water pond
Horizontally
perpendicular
to the unit
Connection
mounting stand
above 100mm
above 100mm
above 100mm
2,300mm or more
Plug
above 300mm
above 400mm
must not bend
Maximum pipe length 30m
Minimum pipe length 3m
inner diameter ø 16mm
above 200mm
above 100mm
give clearance
as wide as
possible
above 100mm
above 700mm
above 200mm
CAUTION
For horizontally out to right piping
GOOD
For right piping, follow the instruction as below:
●
Press the upper side of clamp
●
Unfold the pipe to downward slowly.
●
Bend the pipe to the right side of chassis.
BAD
Following bending from left to right directly
could cause damage to pipe.
●This unit is chargeless up to 30m pipe length.
●Installation of pipe length less than minimum pipe length
requirement (3 meters) may generate an abnormal sound.
!
CAUTION
This symbol shows that this equipment
uses a flammable refrigerant.
If the refrigerant is leaked, together
with an external ignition source, there
is a possibility of ignition.
This symbol shows that the Operation
Instructions should be read carefully.
This symbol shows that a service
personnel should be handling this
equipment with reference to the
Installation Manual.
This symbol shows that there is
information included in the Operation
Manual and/or Installation Manual
WARNING
CAUTION
CAUTION
CAUTION
CAUTION
●
A brazed, welded or mechanical
connection shall be made before
opening the valves to permit
refrigerant to flow between the
refrigerating system parts. A vacuum
valve shall be provided to evacuate
the interconnecting pipe and/or any
uncharged refrigerating system.
●
Mechanical connectors used indoor
shall comply with ISO 14903.
When mechanical connectors are
reused indoors, sealing parts shall
be renewed. When flare joints are
reused indoors, the flare part shall
be re-frabricated.
●
Refrigerant tubing shall be protected
or enclosed to avoid damage.
!
RAC-PH30HLT
–– 1.60kg
Model Maximum
charge R32
Additional
R32
1.60kg 2.44m230m
Factory
charge R32
Indoor
Amin (m2)
Chargeless
up to
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.
Tools Needed For Installation Work
●Flare nut must use a torque wrench without fail. Tighten with the specified tightening torque.
If the flare nut is tightened too much, after a long period of time, the flare nut breaks, Gas
leakage, stagnation, touching fire, rarely cause ignition.
●Sharp bending of the pipe use the polyethylene rod, bend not crushed the pipe. Gas leakage
from the crushed part, stagnation, touching fire, rarely cause ignition.
●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.
●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.
●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 R32. Otherwise, this may result in broken copper
pipes or faults.
●When installing or removing an air conditioner, only specified refrigerant (R32) 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. Be aware that refrigerants may not contain
an odour.
●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.
●Must install air conditioner according to the electrical installation standards for Thailand of
the Engineering Institue of Thailand under The Royal Patronage of His Majesty (the King).
●A circuit breaker must be installed. Without a circuit breaker or fuse the danger of electric
shock exists.
The external switch shall be incorporated to completely disconnect from power supply. It
should disconnect all poles, and a contact separation of at least 3mm must be present.
●Do not install the unit near a location where there is flammable gas. The outdoor unit may
catch fire if
flammable gas leaks around it.
●
Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist
flows 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 flow of water when installing the drain hose.
●Piping shall be suitable supported with a maximum spacing of 1m between the supports.
!
!
CAUTION
!
WARNING
!
●Carefully read through the procedures of
proper installation before starting installation
work.
●The sales agent should inform customers
regarding the correct operation of installation.
( mark is tool exclusive use for R32)
●+ –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
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< IA1890: B >
INSTALLATION
MANUAL
SPLIT UNIT AIR CONDITIONER
INDOOR UNIT
RAS-PH30HLT
OUTDOOR UNIT
RAC-PH30HLT
EN INSTRUCTION MANUAL
FOR SERVICE
PERSONNEL ONLY
CAUTION CAUTION
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.
Rubber strap tied
with great force
Pipe
!
CAUTION
!

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 R32)
< IA1890: B >
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 flaring, please put on the flare nut.
Pipe Connection
2
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
CAUTION
!
CONNECTION OF POWER CORD
Removal Of Air From The Pipe And Gas Leakage Inspection
3
Outer
Diameter (mm)
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
Clutch type
A (mm)
1.5 ~ 2.0
1.5 ~ 2.0
1.5 ~ 2.5
1.5 ~ 2.5
Wing nut type
Thickness
(mm)
0.8
0.8
0.8
1.0
0.0 ~0.5
0.0 ~0.5
0.0 ~0.5
0.0 ~0.5
Flare tool for R32
Clutch type
Conventional flare tool
Outer
diameter
of pipe
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
15.88 (5/8")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
15.88 (5/8")
Valve core cap
Torque N.m
(kgf
● cm)
13.7 ~ 18.6 (140 ~ 190)
34.3 ~ 44.1 (350 ~ 450)
44.1 ~ 53.9 (450 ~ 550)
49 ~ 58.8 (500 ~ 600)
19.6 ~ 24.5 (200 ~ 250)
19.6 ~ 24.5 (200 ~ 250)
29.4 ~ 34.3 (300 ~ 350)
29.0 ~ 31.0 (296 ~ 316)
12.3 ~ 15.7 (125 ~ 160)
Small dia. side
Large dia. side
Valve
head cap
Small dia. side
Large dia. side
CAUTION
!
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.
AIR REMOVAL
When the meter reaches - 101KPa (-76cmHg)
during pumping, fully tighten the shuttle.
/R +L
Meter showing pressure
Closed
R32
Manifold valve
Vacuum pump
Valve
Charge hose
Valve
Vacuum
pump
adapter
When pumping starts, slightly loosen the
flare nut to check of air sucked in. Then
tighten the flare nut.
Procedures of using Vacuum Pump for Air Removal
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.
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 flow 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.
●Open the side plate by
unscrewing the screws as
shown beside.
Please face this side (suction
side) of the unit to the wall.
Please
remove
side cover
when
connecting
the piping
and
connecting
cord.
CAUTION
!
Please make sure to remove all
spacers inside the unit.
●Open the Top, Back and Side
cover of the unit.
●Pull out the spacers inside.
(Spacers are only for
transportation purpose).
If not remove, vibration and
noise will occur.
Top cover
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 into the base. After installation, check whether the drain
pipe cling to the base firmly.
When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy
conditions, water from the heat exchanger may freeze on the base
surface to cause poor drainage. When using the air conditioner in such
areas, do not install the bushings. Keep a minimum of 250mm between
the drain hole and the ground. When using the drain pipe, consult your
sales agent.
For more details, refer to the installation Manual for Cold Areas.
Side cover
Back cover
Pull downward
BASE
DRAIN PIPE
Spacer
inside
Procedures of Wiring
Indoor Unit Outdoor Unit
Detail of Cutting the Connecting Cord
Connecting cord
Outdoor UnitIndoor Unit
Power line
Green + Yellow
(ground)
Green + Yellow
(ground)
Connecting cord Connecting cord
Strip wires
Strip wires
Green +
Yellow
●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 wire specified for the use of air-conditioner.
●Please refer to the manual for wire connection and the wiring technique should
meet the standard of the electrical installation.
●There is an AC voltage drop between the LN terminal if the power is on. Therefore,
be sure to remove the plug from its socket.
WARNING
!
Wiring Of The Indoor Unit
●For wire connection of the indoor unit, you need to remove the front cover,
the low cover under the body of the unit and terminal cover.
●Remove the cover from the terminal base and screw the cable.
Cord band
After remove the
screw and terminal
cover, and put the
connecting cords and
fix the terminal cover
with screw. Connecting cord
Method to remove electrical cover
●Remove the screw and electrical cover.
●Insert the connecting cord (1, 2, 3) from the back of unit.
●Fixed the wire to terminal wires firmly as shown as below.
WARNING
!
●Leave some space in the connecting cord
for maintenance purpose and be sure to
secure it with the cord band.
●Secure the connecting cord along the coated
part of the wire using the cord band. Do
not exert pressure on the wire as this may
cause overheating or fire.
How to connect the optional parts
(RAC Adapter, Dry contact, Wired Remote Controller)
●For cable connection to control P.W.B., you need to remove front cover and
electrical box cover.
Each connecting location is as below.
1Dry contact: CN6
2H-LINK: CN7
3Wired Remote Controller : CN20
●Please check and confirm manuals attached to each optional parts for more
connection details.
●You can refer to this installation manual how to remove and re-attach the
front cover.
●Please be careful not to damage lead wires by edge of plate when connecting
the optional parts.
Wiring of The Outdoor Unit
●Please remove the side cover for wire connection.
WARNING
!
●If you cannot attach the side plate due to the connection cord, please press the connecting
cord in the 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.)
●Before installation, the power source must be checked and necessary wiring work must be completed. To make
the wiring capacity proper, use the wire gauge list below for the wiring from house distribution fuse box to the
outdoor unit in consideration of the locked rotor current.
●Investigate the power supply capacity and other electrical conditions at the
installing 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 unit . In localities
where electrical conditions are poor, use of a voltage regulation is recommended.
●Install outdoor for the room air conditioner within the reaching range of the line
cord.
Earth terminal
Outdoor supply cords shall not be lighter than
polychloroprene sheathed flexible cord with
code designation 60245 IEC 57.
IMPORTANT
Circuit Breaker
20A
Wire length
up to 30 m
Wire cross-section
1.5mm2
For (Connecting cord - 1, 2, 3, Earth)
Wire cross-section
2.5 mm2
For (Power cord - L, N, Earth)
!
WARNING THIS APPLIANCE MUST BE EARTHED.
Power cord
Electrical cover
Connecting cord
Screw
Checking for the electric source and the voltage range
Cover
CAUTION
Wrench
Flare nut
Torque
wrench
Copper pipe
Trimming tool
Cap of valve
head
Hexagonal
Wrench Key
Cap of valve core
The body of
service valve
Cap of valve head
!
BURST HAZARD
Do not allow air, etc. to get into refrigerant
cycle (piping)
RISK OF EXPLOSION
Compressor must be stopped before
removing refrigerant pipes.
All service valve must be fully closed after
pumping down operation.
WARNING
FINAL STAGE OF INSTALLATION
Pump Down Method When Reuse
Existing Piping (R410A Model) for
R32 Model
Proper Pump Down Method
●Compressor oil of R410A model is insoluble in
compressor oil of R32 model. The mixing of compressor
oil may cause damage of compressor.
Possibility of Mixing
●Reuse of piping of R410A model is dangerous because
of its compressor oil.
●When reuse piping of R410A model, pump down must
be carried out properly to ensure compressor oil which
is remained inside piping is collected away.
To Reuse Old Piping
●Piping of R410A model can be reused only when air-
conditioner is properly pumped down.
●The purpose of pump down is to collect back the
compressor oil (which is mixed with refrigerant and
circulating inside refrigeration cycle) properly into the
outdoor unit of air conditioner.
1Operate air conditioner at
cooling mode for 10~15
minutes
2After 10~15 minutes of pre
operation, close 2s valve.
After 3 minutes, close 4s
valve.
Reuse of piping R410A model only apply if previous
model is Hitachi and proper pump down method is
used.
CAUTION
3Take out air conditioner unit. 4Install New Refrigerant air
conditioner
Most Important
Process
Purpose: To make the
oil & refrigerant mix
together. They are in
separated condition
when air conditioner is
stopped.
Mixed
refrigerant
& oil will be
collected into
outdoor unit.
It is advisable to
flush the piping with
R32 to avoid any
contamination remain
before new installation.
!
Insulation And Maintenance
Of Pipe Connection
1
●The connected terminals should be completely
sealed with heat insulator and then tied up with
rubber strap.
●Please tie the pipe and power line together with vinyl
tape as shown in the 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.
●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.
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 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.
The controller should be insert from top into
bottom side of the holder as shown below.
Installation Of Remote
Controller
2
Remote Controller
Screw (2 pieces)
Holder for Remote Controller
Perform a trial run to make sure that
the air conditioner operates properly.
1. Press the COOL button (in summer) or
HEAT button (in winter) of the remote
controller.
2. Press the ROOM TEMPERATURE
button to set the temperature to 16°C
for cooling mode or 32°C for heating
mode. Set the fan speed to “ ”
(HI).
3. Operate the air conditioner for at least
20 minutes and make sure that the
air from the air conditioner is cool or
warm.
4. Press the STOP button on the remote
controller to make sure that the air
conditioner stops running.
Trial run ❖Be sure to measure
the supply voltage
before plugging the
power cord into the
power outlet.
Must install air conditioner according to the electrical installation standards for
Thailand of the Engineering Institue of Thailand under The Royal Patronage
of His Majesty (the King).
BUSH
DRAIN PIPE
BUSH
100 mm ABOVE
●Recommend to use
R32 flaring tool
Die Die
Copper pipe
Gas Leakage Inspection