Hitachi RAC-D10EX5 Manual Download

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30mm

10mm

70mm

30mm

10mm

50mm

10mm

50mm

10mm

30mm

10mm

70mm

10mm

50mm

10mm

50mm

—

Procedures of Wiring

When power supplies to Indoor Unit

When power supplies to Outdoor Unit

45 ~ 55mm

Preparation of Pipe

INST

ALLA

TION OF REFRIGERA

TING PIPES AND AIR REMO

• Use a pipe cutter to cut the copper pipe and remove burr.

• Before flaring, please put on the flare nut.

CAUTION

• Remove burr and jagged edge will cause leakage.
• Point the side to be trimmed downwards during trimming to

prevent copper chips from entering the pipe.

Trimming tool

Copper pipe

Die

Copper pipe

• Please use exclusive tool for

refrigerant R410.

Die

A (mm) Rigid Flaring Tool

For R410A tool

For R22 tool

6.35 (1/4")

0 – 0.5

1.0

(3/8")

0 – 0.5

1.0

Outer Diameter

(ø)

Pipe Connection

CAUTION

• In case of removing flare nut of a indoor unit, first remove a nut of small diameter side, or a seal cap of big diameter side

will fly out.

• Free from water into the piping when working.
• Be sure to tighten the flare nut to the specified torque with a torque wrench. If the flare nut is overtightened, the nut may

be split after a long period has passed, and may cause a refrigerant leak.

Outer diameter

of pipe (ø)

Torque N • m

(kgf • cm)

Small diameter side

6.35 (1/4")

13.7 – 18.6 (140 – 190)

Large diameter side

9.52 (3/8")

34.3 – 44.1 (350 – 450)

Small diameter side

6.35 (1/4")

19.6 – 24.5 (200 – 250)

Large diameter side

9.52 (3/8")

19.6 – 24.5 (200 – 250)

Valve core cap

12.3 – 15.7 (125 – 160)

Valve head

cap

Flare nut

Torque wrench

Wrench

Remove of Air from the Pipe and Gas Leakage Inspection

AIR REMO

Procedures of using Vacuum Pump for Air Removal

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 tighter 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.
• Loosen the spindle of the service valve with small

diameter by 1/4 turn and tighten the spindle immediately
after 5 to 6 seconds.

• Remove the charging hose from the service valve.

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

Tighten the cap of valve head. Check the cap’s periphery if
there is any gas leakage. The task is then completed.

Please use gas leakage detector to check if
leakage occurs at connection of Flare nut as
shown on the right.

If gas leakage occurs, further tighten the
connection to stop leakage.

CONNECTION OF PO

WER CORD

WARNING

• THIS APPLIANCE MUST

BE EARTHED.

WARNING

• The naked part of the wire core should

be 10mm 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

• 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.

AC 220–230V

1ø 50Hz

ø1.6 or ø2.0

Connecting cord

Outdoor unit

Indoor unit

Line cord

ø2.0

Connecting cord

ø1.6 or
ø2.0

Outdoor unit

Indoor unit

AC 220–230V

1ø 50Hz

Indoor unit

Outdoor unit

Indoor unit

Outdoor unit

Detail of cutting the connecting cord

Green + Yellow

Strip wires

Green + Yellow

Strip wires

Green + Yellow

When power supplied to outdoor unit

• Power cannot be turned off using power switch. Always keep the switch “off” and put the switch cover on the

power switch so that the power cannot be turned on.

• Power cord is not necessary, store it in the lower-side space on the rear side of indoor unit. When storing, warp

the power plug with the vinyl bag for the parts, etc. and seal with adhesive tape to prevent dust or dirt.

• Terminal A and B of indoor unit do not need to be connected.

• When power supplied to outdoor unit, power is not turned off by switching the power of indoor unit to “OFF”. In

that case, please cut the breaker.

• Wiring for the horizontal piping from the right side.

• Remove the cover from the terminal base and screw the cable.

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

Connecting cord

Earth

Terminal cover

Screw

WARNING

After wiring the indoor unit, make sure to
reattach the terminal cover.

Securely screw in the power cord and connecting cord so that it will not get
loose or disconnect.

Tightening torque reference value: 1.2 to 1.6 N·m (12 to 16 kgf·cm).

Excessive tightening may damage the interior of the cord requiring
replacement.

When putting two connecting cords through the band.

Not to interfere with the drain hose, fold the cable at the drain hose side of
the electric box as shown in the left figure, and pass the cable just over the
electric box and pull it out.

Screw

Connecting cord

Cord band

C D

L(A)N(B)

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 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.)

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 gauge list below for the wiring from house distribution fuse box to the outdoor unit in consideration of the blocked rotor current.

IMPORTANT

• 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.

Cover

Earth terminal

Wire length

Wire gauge

up to 6m

1.6mm

up to 15m

2.5mm

up to 20m

4.0mm

Fuse Capacity

16A time delay fuse

IMPORTANT

FINAL ST

Heat Insulation and Finish of the Piping

• The connected terminals should be completed sealed with heat insulator and then tied up

with rubber strap.

• Do not tie the terminals with the tape too tight.

• If any clearance or over-tightening may cause condensation.

• Please tie the pipe and power cord together with vinyl tape as shown in the figure showing

the installation of Indoor and Outdoor units.

• To enhance the heat insulation and to prevent water condensation, please cover the outdoor

part of the drain hose and pipe with insulation sheet.

• Completely seal any gap with putty.

Insulation sheet for pipe connection

Putty

Sleeve of
protection pipe

Address Changing Switch

This is utilized to avoid the interference of remote controller signals when there are two indoor devices
installed in the same room. The Address Changing Switch is on the outside of the remote controller
battery cover (set to “A” during shipment).

• Setting the address (to avoid interference)

Only one of the two indoor devices has to be set (turn off the power to the other indoor device).

Place a battery in the remote controller and press the reset switch (please refer to page 29 in the
Instruction Manual).

While pointing the remote controller transmitter/receiver at the indoor device, move the switch of
the Address Changing Switch to “B”.

The channel is set when the device beeps, confirming it has received the signal.

• After changing the address, please confirm the device’s operation with the remote controller. If the

device does not operate, return the switch to “A” and please set the switch again.

• Installing and verifying the air purifying filter/duct filter (fresh air in pre-filter, exhaust pre-filter, nano-titanium disinfecting deodorizing/dust collecting fresh

air in filter). (Refer to Instruction Manual pages 10, 11.)

• Open the air purifying unit and attach

the air purifying filter with the jagged side
up.

Nano-Titanium disinfecting deodorizing/
dust collecting fresh air in filter

• Remove the fresh air in pre-filter and the

filter frame.

• Remove the air purifying unit (2 pieces)

by pulling out while pushing up with both
hands.

Power Source and Operation Test

Power source

WARNING

• Never extend the power cord.

• 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.

• The power cable easily generates heat. Do not bring the cable together

with a wire or vinyl tie.

CAUTION

• Do not operate the unit for more than 5 minutes while the spindle of

the service valve is closed.

• 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.

• If the indoor unit won’t operate, check the cable for correct connection.

• Turn on the lamp in the room where the indoor unit is installed and check

the remote controller for normal operation.

Force-cooling Operation

• When the service switch of the outdoor unit is pressed for 1 or more

seconds, the force-cooling operation starts. Use this mode when
performing the failure diagnosis or collecting refrigerant into the outdoor
unit.

Screw

Cover

Service switch (If the switch is pressed for
more than 1 second, the force-cooling
operation starts. If the switch is pressed
for additional more than 1 second, the
operation stops.)

Removing and Attaching the Front Panel

• After opening the front panel all the way with both hands, press the

arm on the far right side to the inside and remove it from the hole, then
pull forward.

• Please ensure that the front panel is attached with both hands.

Removing

• Take both arms of the front panel and press into the holes along the

steps of the device. Close the front panel after confirming that the arms
are attached.

Attaching

Front panel

Steps

Front panel

Confirm that the w-plate has been installed.

After inserting the front cover into the device, ensure that the top
tabs (3 places) have been inserted. In addition, secure the centre
tab (1 place). At this time, ensure that the front cover is not lodged
above the two way air exchange fan unit.

Tighten the screw to the two way air exchange fan unit.

Tighten the two screws at the bottom of the front cover and replace
the screw cover.

Replace the exhaust pre-filter, top grill, air purifying unit, pre-filter
and front panel.

Remove the front panel, pre-filter, air purifying unit, top grill and
exhaust pre-filter. (Refer to page 10 of Instruction Manual)

Remove the screw cover at the bottom of the front cover and remove
the screw.

Remove the screw behind the exhaust pre-filter.

Remove the centre tab of the front cover (1 place).

Place your hands on both sides of the front cover and remove while
pulling in the direction of the arrow.

Removing the front cover

Attaching the front cover

Ensure that the front cover is not
lodged above the two way air
exchange fan unit.

Screw (for two way air
exchange fan unit)

Screws

Connect the two way air exchange hose to the net.

When the two way air exchange hose is ø25

Attach the hood to the net, insert the two way air exchange hose in the net and fix with vinyl tape.

(1) Insert the hood until it touches the end.

(2) Fix the tab of the net to the tab of the hood.

(3) Wrap the tip of the two way air exchange hose with vinyl tape (locally procured) 2 – 3 round.

(4) Insert the two way air exchange hose (A) inside the net until it touches the end and fix it with vinyl tape (locally procured).

Using two way air exchange outlet cover (HC-DS5)

Cut the two way air exchange hose at 45-55mm from wall.

Wrap the top of the two way air exchange hose with vinyl tape (procure locally) tightly.

Attach the net to the two way air exchange hose, and then seal with vinyl tape (procure locally).

Attach the two way air exchange outlet cover.

In case a hole cannot be opened in the outer wall

Only the exhaust is possible when the hole in the wall passes through to the outside of the room.

Install the net to the two way air exchange hose and seal with vinyl tape.

Place the two way air exchange hose in the space within the wall.

Ensure that the two way air exchange Selection Switch is on “Stop Fresh air in” (refer to “Setting
the two way air exchange Selection Switch” on page 12.)

CAUTION

• Do not supply air from inside a wall.

By supplying highly humid air from inside
a wall or from underneath the floor, this
will cause dew to form. In addition, the
odors from inside a wall or from
underneath the floor may cause the odors
to infiltrate the room.

Insert the two way air exchange
hose into the wall gap.

Drain hose

Refrigerating pipe

Drain hose

Connecting cord

Indoor unit

Refrigerating pipe

Net

Drain hose

Two way air
exchange outlet
cover (HC-DS5)

Downward piping

Drain hose

Exhaust

Attach the outlet cover
from the top.

Be careful that the net does
not come out from opening
of the outlet cover.

In Case of Embedded Piping

In case a hole can be opened in the outer wall.

Open a hole of ø40 and above on the external wall at right bottom side of the air conditioner.

Pull out the two way air exchange hose, attach the

net and

hood, then seal with vinyl

tape.

Finish by sealing with putty.

Fresh air in pre-filter

Air purifying unit

Shaft

Screw cover

Screws

Screw cover

Screw (Rear of
Exhaust Pre-filter)

Fix the top tabs (3 places)

Fix the centre
tab (1 place)

Remove this tab

Affixing the Remote Controller and Installing the Air Purifying Filter

• The remote controller may be affixed to a wall or pillar with the remote controller mounting screw

• When operating the air conditioning with the remote controller attached, please confirm that the signal is received by the air conditioning.

Furthermore, fluorescent lighting may affect the reception of the signal, therefore, please confirm by turning on the fluorescent lighting even
during the day.

• Lighting fixtures with electronic starters may shorten the reception distance and may even interfere with the signal being received.

Installation

• Insert the remote controller on the

mounting bracket from above.

Wall or pillar

Remote Controller
Mounting Screw

Switch

Address Changing
Switch

Air purifying unit

• Improper filter installation may result in abnormal noises.

Air purifying filter
(Included)

Filter frame

Fresh air in pre-filter

Filter frame

• Attach the filter frame and the fresh air

in pre-filter.

• Attach the

Nano-Titanium disinfecting

deodorizing/dust collecting fresh air in filter
to the filter frame.

Setting the Two Way Air Exchange Selection Switch

Two way air exchange Selection Switch

Prohibit Two Way Air Exchange

Only Exhaust

Operate Two Way Air Exchange

When operating the Two way air exchange. Please utilize this mode
for normal operation.

When stopping the Fresh air in operation. Please select this mode
when there is space to vent the Two way air exchange hose between
the internal and external walls, which leads outside the room, even if
the mounting work cannot directly vent the Two way air exchange hose
outside the room.

When stopping the Two way air exchange operation. Please select
this mode when the Two way air exchange hose cannot be vented
directly outside the room (Installation work specified for the embedded
ducting) or when there is a source of a questionable odor, smoke, or
oily smoke in the vicinity of the opening of the Two way air exchange
hose, even if the mounting work directly vents the Two way air exchange
hose outside the room.

Operate Two Way Air

Exchange

Only Exhaust

Prohibit Two Way Air

Exchange

Operation test

After completing the service switch operation, be sure to keep the
switch pressed for one or more seconds and stop the force-cooling
operation.

Arm

Steps

Attaching the Top Grill

Removing

Attaching

Position the “

” sign away.

Slide along the top of the
indoor device and press.

Lift up while pressing the top
grill and remove from tab.
(3 places: left, centre and right)

Tab

Press the top grill down and
affix with the hold down tab.

Pull forward.

End Treatment of Two Way Air Exchange Hose

• Treat the end of two way air exchange hose placed outdoor as follows.

Cut the two way air exchange hose so that the height difference between downward bending point and the
tip of the hood becomes 240 – 300mm.
• When the two way air exchange hose can be brought down straight from the wall hole, cut the hose at the

point 190 – 250 mm away from the wall hole.

• When arranging the two way air exchange hose in outdoor, cut the hose at the point 190 – 250 mm away

from the downward bending point.

When not using the outlet cover

CAUTION

• In case the distance to the two way

air exchange hose is small or the
hose is not fixed downward, rain
may drip into the room from the two
way air exchange hose.

• Set the hose longer at strong wind

area or seaside.

Hood

Net

Two way air

exchange hose (A)

Tab

Two way air

exchange hose

Outer wall

Inner wall

Two way air

exchange hose (A)

When bringing down straight from the wall hole

When arranging the hose in outdoor

Horizontal piping

Upward piping

Drain hose

Connecting cord

Two way air

exchange hose

Seal with tape

Indoor/Outdoor putty

Wall hole ( more
than ø40)

Refrigerating pipe

Air conditioner

Wall hole for two way air
exchange hose ( more
than ø40)

Wall hole for
refrigerating pipe

Seal with tape

Decorative tape

Net

Hood

Refrigerating pipe

Decorative tape

Two way air

exchange hose

Fix the two way air exchange hose with the drain hose with decorative tape. (Refer to the above drawing.) In this case, face it downwards to avoid
covering the two way air exchange opening.

Two way air
exchange hose

Drain hose

Two way air exchange hose

Refrigerating pipe

Piping and drain hose layout

Bottom cover
bush hole

Tab

ø2.0

Connecting cord

Bottom cover

Cord band screw

Cord band

Wiring of the Indoor Unit

•

For wire connection of the Indoor unit, you need to remove the front cover (refer to page 14), the low cover from the body of the
unit and terminal cover.

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

Meter showing
pressure

Closed

R410A Manifold valve

Vacuum pump

Vacuum pump adapter

Valve

Charge hose

Valve

When pumping starts, slightly loosen the flare
nut to check of air sucked in. Then tighten the
flare nut.

The body of
service valve

Cap of
valve core