Hitachi RAF25NH4 Скачать руководство пользователя страница 2

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5. Connection of the connecting cord

(1) Remove the cover of the electric box.
(2) Connect the connecting cords.
(3) Assemble the cover of electric box.

3. Fixing the indoor unit

65mm

165mm

420mm

572mm

ø9 rear fixing hole for anchor
bolt or screw of accessory.

Drain hose make lower
than center of the hole.

40mm or less

 WARNING

Even if there is space between the
indoor unit and the back wall,
make sure to securely attach the
indoor unit to the wall, ceiling or
floor using wire to prevent it from
falling.

Fixing the top of indoor unit

Case 2

Fixing the base of indoor unit

• Fix the base of indoor unit on the floor with 4.1 

×

 32mm screws. (Right and left)

2. Push plug into the holes.

1. Drill holes on floor.

(The plug can be secured diagonally with a screw as shown above.)

Floor

 WARNING

Be sure to attach screw

3

 to prevent the indoor

unit from overturn.

• When fixing the indoor

unit above the ground,
be sure to fix an L-angle
at the bottom to support
it.

Case 1

2. Push plug into the holes.

1. Drill holes on floor.

• To drill holes, either Case 1 or 2 may be used.

3

 Screw

32mm

ø4.8mm

3

 Screw

Indoor unit

3

 Screw

Indoor unit

Plug
(Procure locally)

Floor

ø4.8mm

32mm

Plug
(Procure locally)

BUIIT-IN INSTALLATION

1

If upper or lower air outlet is covered with the lattice door, room temperature may not be controlled properly. Therefore, air
outlet must be open as much as possible.

2

If air deflector of upper air outlet is adjusted too much upward, room temperature may not be controlled properly due to the
heat inside the lattice door. Therefore, the deflector must be adjusted to nearly horizontal angle.

3

If signal receiver is covered with the lattice door, signal receiving distance or range (angle) becomes smaller. Therefore,
signal receiver must not be covered with the lattice door.

4

Only the vertical lattice door may be used. Be sure to use a lattice door with an open area ratio of 75% or more. If another
lattice door or one with an open area ratio of less than 75% is used, maximum performance may not be obtained.

5

With a built-in installation, it may take more time to reach the set temperature after the unit is switched on.

(Unit: mm)

Connection of the connecting cord

Securely screw in the
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.

Connecting
cord

C

D

Connect the
earth cord

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

 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.

Please ensure the smooth flow of condensed water of the Indoor unit during installation.
(Carelessness may result in water leakage.)

 CAUTION

 WARNING

Be sure that the hose is
not loosely connected
or bent.

Bending
upwards

Bad

Condensed
water pond

Bad

Bad

Condensed
water pond

Bad

• THIS APPLIANCE MUST

BE EARTHED.

WARNING

Detail of cutting the connecting cord

Green-and-yellow
(ground)

Connecting cord

50mm

25mm

10mm

10mm

6. Checking of drawing drain hose

(1) Connect the separate drain hose to the drain hose that is attached to the indoor unit.
(2) For keeping the smooth flowing of condensed water the drain hose should be inclined as shown in figure below.

7. Installation of remote controller

• 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.

8. Final stage of installation
8.1

Insulation and maintenance of pipe connection

• The connected terminals should be completed 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 enhance 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.

8.2

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.

• If the indoor unit does not operate, check to see that the connections are correct.

The controller must be
hooked onto the hook at
the lower par t of the
holder. Push in the
remote controller in the
direction as shown in
figure below.

Holder for Remote
Controller

Remote controller

Screw (2 pieces)

Sleeve of
protection pipe

Putty

Putty

OUTSIDE

INSIDE

Upper air outlet

Signal receiver

Above 100

Above 200

Below 20

Air conditioner

Lower air outlet

Above 150

Lattice door

4. Installation of refrigerating pipes and air removal
4.1

Preparation of pipe

• Use a pipe cutter to cut the copper pipe.

•  Before flaring, please put on the flare nut.

Trimming tool

Copper pipe

 CAUTION

• Jagged edge will cause leakage.
• Point the side to be trimmed downwards during trimming to

prevent copper chips from entering the pipe.

Outer Diameter (ø)

A (mm) Rigid Flaring Tool

For R410A tool

For R22 tool

6.35 (1/4")

0 – 0.5

1.0

9.52 (3/8")

0 – 0.5

1.0

12.7 (1/2")

0 – 0.5

1.0

A

Die

• Please use exclusive tool.

Copper pipe

Die

4.2

Pipe connection

• Please be careful when bending the copper pipe.
• Screw in manually while adjusting the center. After that, use a torque wrench to tighten the connection.

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.

 CAUTION

Flare nut

Wrench

Torque
wrench

 Outer diameter

Torque N·m

of pipe (ø)

(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)

12.7 (1/2")

44.1 – 53.9 (450 – 550)

Valve head

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)

cap

12.7 (1/2")

29.4 – 34.3 (300 – 350)

Valve core cap

12.3 – 15.7 (125 – 160)

  Gas leakage inspection

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.
(Use the detector provided for R410A.)

3

 Screw

Attaching

1

Attach three front panel bearings to the axis of the front
cover.

2

Insert the tip of the resin band into the hole of the
protrusion inside the right section of the front panel.

Hook

Front cover

Front panel

Resin band

1

Press the hook found at the tip of the resin band installed
inside the front panel’s right section to remove the resin
band.

2

Pull the front panel down toward you and once fully open,
pull it to remove.

How to install and remove the front panel

• Be sure to use both hands to grasp the front panel when removing it or attaching it.
• The front panel may be installed up or down to suit user preference.

Removing

Resin band

Trial run should be conducted on one unit at a time to check for incorrect wiring of
connecting cord.

 CAUTION

Ditch

In the case of fixing by the anchor bolt

Bury the ø6 anchor bolt into the wall as shown in below.
Lift up the indoor unit slightly and hang.

In the case of fixing by the screw of accessory

Bury the plug into the wall as shown in below to attach
the screw 

9

. Lift up the indoor unit slightly and hang.

Wall

ø

4.8mm

9

 Screw

Wall

32mm

Plug
(Procure locally)

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