Hitachi RAC-18GH4 Скачать руководство пользователя страница 2

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.

When removing side cover, please pull the handle after undoing the
hook by pulling it downward.

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)

FINAL ST

A

GE OF INST

ALLA

TION

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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I548: A 

>

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.

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 anti-
clockwise 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

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

INST

ALLA

TION OF REFRIGERA

TING PIPES AND AIR REMO

VA

L

CAUTION

!

Outer
Diameter (mm)

6.35

9.52

12.7

Imperial flaring tool

0.0 

~

 0.5mm

0.0 

~

 0.5mm

0.0 

~

 0.5mm

Rigid flaring tool

A (mm)

AIR REMO

V

A

L

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 3x1.5mm

2

, (fuse = 30A 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 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.

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 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.

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 

1

6m

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

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.

WARNING

!

In case that power is supplied from Indoor Unit

How to Remove The Front Cover

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

BASE

DRAIN PIPE

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.

Power line

Control line

Indoor

Unit

Outdoor

Unit

GRN + YEL

GRN + YEL

Strip wires

Fuse Capacity

20A time delay fuse

Connect the
earth cord

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

Earth terminal

B

A

C D

1

Remove the front panel.

Please remove and attach the front panel by both hands.

After opening the front panel by both hands.

1

1

1

1

1

Undo the right arm while pushing it inside.

2

2

2

2

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

1

1

1

1

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.

2

2

2

2

2

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

3

3

3

3

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.

4

4

4

4

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

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.

A

Copper pipe

Trimming tool

A

Die

Die

Copper pipe

1.0mm

1.0mm

1.0mm

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

L

N

D

C

B

A

D

C

B

A

Indoor Unit

Line Cord

AC 220-240V

Outdoor Unit

Connecting Cord

1.6 or 2.0

2.0

25mm

25mm

10mm

30mm

10mm

30mm

10mm

10mm

70mm

10mm

10mm

35mm

Sleeve of
protection pipe

Putty

Putty

Insulation material for pipe connection

Remote

Controller

Holder for
Remote Controller

Screw (2 pieces)

1

2

Wiring Of The Indoor Unit

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

Method to remove front panel

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

Method to remove electrical cover

Remove the screw and electrical cover.

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

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

AUTO

RESTART

SWITCH

AUTO

RESTART

SWITCH

Screw

Electrical cover

Screw

A

B

C

D

ON

OFF

DRAIN PIPE

BUSH

100 mm ABOVE

10

9

BUSH

11

1

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

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