Hitachi RAS-X18CX, RAC-X18CX Installation Manual

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 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.

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.

Procedures of Installation and Precautions

●

Procedures to fix the hanger.

1.Drill holes on wall. 2. Push plug into the holes. 3. Fix the hanger on wall
(As shown below) (As shown below) with 4.1 x 32 screw

(As shown in figure below)

●

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 Unit2

VERTICALLY DOWNWARD PIPING

Preparation

●

Connect connecting cord.

●

Pull out the pipe, connecting cord and drain hose.

Installation

●

The upper part of the Indoor unit is hanged on the hanger.

●

The projection at the lower part of the Indoor unit is hooked onto the hanger.

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.

!

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).

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. Use
holder to hold them tight.

!

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

!

CAUTION

●

Please fix in the plastic core
after flaring 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 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
any dew may drop.

!

WARNING

●

The refrigerating pipes and connecting cord
transform and are attached.

●

The end of the refrigerating pipes are at locations
marked with “  ” symbol.

Installation of Drain Hose

3

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.

INDOOR UNIT

<

IA364: B

>

External dimension of

indoor unit

180mm

180mm

80mm

1030mm

ø 65mm

200mm

45mm

30mm

Drain Hose

45mm

298mm

Level

Line

Hole for
pipe

Mark

Weight

Screw for Hanger

Please use more
than 4 screws.

Hanger

32mm

20mm

ø4.8mm

ø4.4mm

Wall

1 Hanger

2 Screw

Plug

Wall

above 50mm

Ceiling

4.1 x 32 Screw

Wall

Remote
Control
Holder

5 Screw

Plug

3

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.

Sleeve of
protection
pipe

WALL

Protection
pipe

Seal with
putty

Seal with
putty

2 ~ 5mm

OutdoorIndoor

Connecting cords,
pipe and drain hose
must be tied together
with Vinyl tape.

Hanger

Hook

Refrigerating
Pipe

Connecting
Cord

Drain Hose

Protection
Pipe

Lift the body
of the unit
upwards and
then force
it downwards.

Hanger

Projection

Screw driver

Claw of indoor unit

Circle hole

2

1

!

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.

●

Turn the piping while holding down the lower
portion of pipe-support by hand.

Drain hoseDrain cap

Drain cap

Please insert
until here

Drain hose

Please insert
until here

Pipe
support

Pull up the pipe after
bending downward

Openings

Pipe

Connecting cord

Drain hose

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

0.65m

about 15cm

Projection

Temporary stand

Connected
section

Holder

Connecting cord

Drain hose

Protection

pipe

Heat insulation pipe

Connecting
cord

Refrigerating pipe

Pull this to the front
during the connection
of refrigerating pipes
to ease task.

Bending
upwards

Condensed
water pond

Ditch

Condensed
water pond

above 50mm

above 100mm

above

0.45m

above 300mm

must not bend

above 100mm

2,300mm or more

1

2

Maximum pipe length 20m

Minimum pipe length 5m

above 200mm

above 700mm

above 200mm

above 50mm when
installed on the
ceiling of balcony

(

)

above 100mm

above 100mm

give clearance as
wide as possible

7

4

3

Plug

5

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 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.

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 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.

INDOOR UNIT

Names of Indoor Components

Hanger

QtyNo. Item

The Length of Indoor Unit

Connecting Cord

Figure showing the Installation of Indoor and
Outdoor Unit.

OUTDOOR UNIT

1

1

Screw for holder of
Remote Controller

(3.1x16)

AAA Size Battery

Direction of Piping

Dimension of Mounting Stand

of the Outdoor unit

(unit : mm)

Holder for Remote
Controller

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.

(4.1x32)

Remote Controller

Purifying Filter

2

6

3

1

4

2

5

2

6

7

8

1

2

● 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 commersial
products).

inner diameter ø 16mm

Be sure to
completely
seal any
gap with
putty.

Insulation pipe

1

Screw for Hanger

0.9m

1.6m

Connection

Horizontally
perpendicular
to the unit

57

12
35

120

500

320

10

35

(10)

340

mounting stand

SPLIT UNIT AIR CONDITIONER

INSTALLATION MANUAL

Indoor Unit Outdoor Unit

RAS-X18CX RAC-X18CX

●

+ – Screwdriver

●

Measuring Tape

●

Knife

●

Saw ● ø 65mm Power Drill ● Hexagonal Wrench
Key ( 4mm) ● Wrench (14, 17, 24mm) ● Gas
Leakage Detector

●

Pipe Cutter

●

Putty

●

Vinyl

Tape

●

Pliers ● Flare Tool

●

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.

!

!

FOR SERVICE PERSONNEL ONLY

This unit is charge less up to 20m pipe length.

!

CAUTION

WARNING

!

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.

●

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 R-410A. 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.

OUTDOOR UNIT

FINAL STAGE OF 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.

Installation Of Remote Controller

2

Power Source And Operation Test

3

●

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.

Power Source

CAUTION

!

●

Please use a new socket. Accident may occur due to the
use of old socket because of poor contact.

●

Please plug in and then remove the plug for 2 – 3 times.
This is to ensure that the plug is completely plugged into
the socket.

●

Keep additional length for the power cord and do not render
the plug under external force as this may cause poor
contact.

●

Do not fix the power cord with U-shape nail.

Operation Test

●

Please ensure that the air conditioner is in normal
operating condition during the operation test.

●

Explain to your customer the proper operation
procedures as described in the user’s manual.

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IA364: B

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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 figure below.

WARNING

●

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.)

●

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, (fuse = 20A 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 220~240V 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.

●

Do not make any connection in the middle of the
connecting cable. It may cause the wire overheating, emit
smoke and fire.

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 lead­in 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

Cable length

up to 16m
up to 15m
up to 25m

Wire cross-section

1.5mm

2

2.5mm

2

4.0mm

2

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

WARNING

!

How to Remove The Front Cover

Fuse Capacity

20A time delay fuse

1 Remove the front panel.

●

Please remove and attach the
front panel by both hands.

●

After opening the front panel by both hands.

11

11

1

Undo the right arm while pushing it inside.

22

22

2

Slide the front panel to right as shown in figure. Then
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.

Cap

Screw

Lower portion of front cover

Deflector

How to Attach the Front Cover

11

11

1

After covering the front cover to the unit, certainly hook at
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

22

2

Fix the front cover at lower portion by screws and attach
the caps.

33

33

3

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.

44

44

4

Attach the filters which are placed the surface written
“FRONT” up.

●

After attaching the filters, push the front panel at three
arrow portion as shown in figure and close it.

Hole

Guide

Shaft

Sleeve of
protection pipe

Putty

Putty

Insulation material for pipe connection

Method to remove electrical cover

●

Remove the screw and electrical cover.

●

Insert the connecting cord (C, D) from the bottom of unit.

●

Fixed the wire to terminal wires firmly as shown in
figure at right side.

Wiring Of The Indoor Unit

●

For wire connection of the Indoor unit, you need to remove
front cover and electrical cover.

Method to remove front panel

●

Refer to “FINAL STAGE OF INSTALLATION – How to Remove
The Front Cover”.

AUTO
RESTART
SWITCH

AUTO
RESTART
SWITCH

Screw

Electrical
cover

Screw

1

2

●

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 below.

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

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

Back cover

Side cover

Remote
Controller

Holder for
Remote Controller

Screw (2 pieces)

Earth terminal

CD

L

N

Removal Of Air From The Pipe And Gas Leakage Inspection

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)

3

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” 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.

2

Completely unscrew the spindle of the
service valve (at 2 places) in anti­clockwise direction to allow the flow of
coolant (using Hexagonal Wrench key).

3

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.

4

1

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 Connection2

INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL

CAUTION

!

AIR REMOVAL

●

Recommend to use
R410A flaring tool.

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.

When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.

Meter showing pressure

Closed
R410A

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.

Copper pipe

Trimming tool

A

Die

Die

Copper pipe

Wrench

Torque
wrench

Flare nut

Lo Hi

The body of
service valve

Cap of

valve core
Hexagonal
Wrench Key

Cap of valve head

Cap of valve head

Power is supplied from Outdoor Unit

DCNLDC

Indoor Unit Outdoor Unit

Connecting Cord

Power Cord

AC 220 - 240V

1.6 or

2.0

2.0

25mm

25mm

10mm

10mm

10mm

35mm

Outdoor Unit

Strip wires

Power line Control line

GRN + YEL

Connect the
earth cord

After remove the screw
and band, put the
connecting cords and fix
the band with screw.

CD

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 R410A

Clutch type

Conventional flare tool

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")

Valve

head cap

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)

Small dia. side
Large dia. side

Valve core cap

Small dia. side
Large dia. side

Pump Down Method When Reuse Existing
Piping (R22 Model) for R410A Model

●

Compressor oil of R22 model is insoluble in compressor oil
of R410A model. The mixing of compressor oil may cause
damage of compressor.

Possibility of Mixing

●

Reuse of piping of R22 model is dangerous because of its
compressor oil.

●

When reuse piping of R22 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 R22 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.

Proper Pump Down Method

1

Operate air conditioner2After 10~15 minutes of pre
at cooling mode for operation, close 2s valve.
10~15 minutes. After 3 minutes, close 4s valve.

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.

3

Take out air conditioner 4 Install New Refrigerant air
unit. conditioner

It is advisable to flush the
piping with R410A to avoid
any contamination remain
before new installation.

Reuse of piping R-22 model only apply if previous model is
Hitachi and proper pump down method is used.

CAUTION

!