Hitachi RAC-14KH2, RAS-14KH2 installation manual Tools Needed For Installation Work

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

FOR SERVICE PERSONNEL ONLY

			● Carefully read through the procedures of proper
				installation before starting installation work.
			● The sales agent should inform customers regarding
SPLIT UNIT AIR CONDITIONER				the correct operation of installation.
	INSTALLATION MANUAL			Tools Needed For Installation Work
			●		+ –	Screwdriver ● Measuring Tape		● Knife
Indoor Unit		Outdoor Unit	● Saw			● ø 65mm Power Drill ● Hexagonal Wrench
			Key (			4mm) ● Wrench (14, 17, 22mm)		● Gas
RAS-14KH2		RAC-14KH2	Leakage Detector				● Pipe Cutter ● Putty	● Vinyl
			Tape			● Pliers	● Flare Tool

SAFETY PRECAUTION

THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation).

		!	WARNING			!	WARNING
	● The unit should be mounted at stable, non-vibratory location which				● The Outdoor unit must be mounted at a location which can sup-
		can provide full support to the unit.				port heavy weight. Otherwise, noise and vibration will increase.
INDOORUNIT		!	CAUTION	OUTDOORUNIT		!	CAUTION
	● No nearby heat source and no obstruction near the air outlet is				● Do not expose the unit under direct sunshine or rain. Besides, ventilation
		allowed.				must be good and clear of obstruction.
	●	The clearance distances from top, right and left are specified in			●	The air blown out of the unit should not point directly to animals or plants.
						smoke.
		figure below.			●	The clearances of the unit from top, left, right and front are specified in
	● The location must be convenient for water drainage and pipe					figure below. At least 3 of the above sides must be open air.
		connection with the Outdoor unit.			● Be sure that the hot air blown out of the unit and noise do not disturb the
						neighbourhood.
	● To avoid interference from noise please place the unit and its
					● Do not install at a location where there is flammable gas, steam, oil and
		remote controller at least 1m from the radio, television and inverter
		type fluorescent lamp.			● The location must be convenient for water drainage.
	● To avoid any error in signal transmission from the remote controller,
					● Place the Outdoor unit and its connecting cord at least 1m away from the
		please put the controller far away from high-frequency machines
						antenna or signal line of television, radio or telephone. This is to avoid
		and high-power wireless systems.
						noise interference.
	● The installation height of indoor unit must be 2.3m or more in a
					● Do not install outdoor unit facing strong wind direction. It may damage the
		non public area.				fan motor.

●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.

Names of Indoor Components

No.	Item	Qty
	Hanger
1		1
	Screw for Hanger
23		6

The Length of Indoor Unit			Figure showing the Installation	! CAUTION
	Connecting Cord		of Indoor and Outdoor Unit.	• The installation height
0.8m		1.5m		of indoor unit must be
				2.3m or more in a non

public area.

Direction of Piping

	! WARNING
●	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 R410A. Otherwise, this may result in broken copper pipes or faults.
●	When installing or removing an air conditioner, 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.

( 4 . 1 x 3 2 )
Holder for Remote
4Controller	1

AAA Size Battery

5 2

Screw for holder of

Remote Controller

6 2

( 3 . 1 x 1 6 )

Remote Controller

7	1
Purifying Filter
	1
8Holder
	1

Horizontally perpendicular to the unit

Connection

There are 4 directions allowed, namely, horizontally perpendicular to the unit, vertically down from right, horizontally out from right and horizontally out to left.

Don’t form the piping downward at the left of the unit.

Dimension of Mounting Stand

of the Outdoor unit

(unit : mm)

mounting stand	57	10
		320	340
		20
12		(10)
35
500	124

Be sure to completely seal any gap with putty.

		0.45m
above 300mm	above
		must not bend
		Maximumpipe length 15m	Minimumpipe length 5m

above 50mm	2
	1

above 100mm

above 100mm

2,300mm or more

			6
		5	4
			The indoor piping should be
	3
Plug			insulated with the enclosed
			insulation	pipe. (If the
			insulator	is	insufficient,
			please use		commersial

	●	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.
		! CAUTION
●		A circuit breaker or fuse 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.

products).

● The difference in height

Names of Outdoor Components
No.9	Bush	Item	Qty
!0	Drain Pipe		12
	Bush

above 200mm

(above 50mm when ) installed on the ceiling of balcony

above 100mm

above 700mm

	between the indoor and
	outdoor	unit should be
	kept max 5m.
above 100mm	● The connecting pipe, no
	matter	big or small,
give clearance as
	should	all be insulated
wide as possible	with insulation pipe and
	then wrapped with vinyl
	tape. (The insulator will
	deteriorate if it is not
	wrapped with tape).
above 200mm	The connection of insulated
	drain hose.
	inner diameter ø 16mm

1

Please use insulated drain hose for the indoor piping (commercial product).

1Installation of Hanger, Wall Penetration and Installation of Protection Pipe

2 Installation of the Indoor Unit

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

!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.

		200mm	125mm
	125mm		280mm
45mm		80mm
			45mm
60mm			115mm
		780mm	Level

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.

	Hanger		1 Hanger
	Refrigerating	Lift the body		!	CAUTION
		of the unit		Please pull the lower part of
	Pipe	upwards and
				the Indoor unit outwards to
		then force it
		downwards.		check if the unit is hooked
Protection			2	onto the	hanger. Improper
				installation may cause
Pipe	Drain Hose Connecting
			Projection	vibration and noise.
	Cord

●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.

8 Holder

Insulation pipe (must be wrapped with vinyl tape at every 120mm).

●Holder can be attached at the either of 2 places. Please select the easier position.

Drain hose

Connecting cord

Pipe

!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.

Pipe Rubber strap tied with great force

INDOOR UNIT

	450mm	Hanger
	Mark
Screw for Hanger
Please use more	Line
than 4 screws.	Weight	Hole for pipe

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)

Ceiling

Wall			above 50mm
1	Hanger
			Plug
	2	Screw
32mm		Wall
			4.1 x 32 Screw

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	[Push] mark positions
2 arrows in the right figure)

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).

THE CONNECTION OF REFRIGERATING PIPE DURING THE INSTALLATION OF INDOOR UNIT

	Preparation To Install Refrigerating Pipes		! CAUTION
●	The refrigerating pipes and connecting cord	● Please fix in the plastic core
	transform and are attached.	after flaring to avoid plastic
● The end of the refrigerating pipes are at locations		chips entering the pipes.
	marked with “ ￿ ” symbol.
			below
			5mm
	Please bend at a small
	radius to form an arc
	0.85m
	Installation
Hang the Indoor unit onto the hanger. Use the temporary stand			Projection
at the back of the Indoor unit to push its lower part 15cm
forwards.			Hook

●Place the drain hose through the hole on the wall.

● Wrap the refrigerating pipes with insulation pipe after connecting refrigerating pipe.

●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)

Wall

	3 Remote
	Control
	Holder
	5	Screw
20mm	Plug

Wall Penetration and Installation of Protection Pipe

●Drill a ø 65mm hole on

wall which is slightly tilted							Indoor		Outdoor	! WARNING
towards the outdoor side.
						Seal with			2 ~ 5mm
										Be sure that the wire is not
Drill	the	wall	at	a	small
						putty			Seal with
angle.									putty	in contact with any metal
										in the wall. Please use the
● Cut	the	protection			pipe
										protection pipe as wire
according to			the		wall
										passing through the hollow
thickness.
										part of the wall so as to
● Empty gap in the sleeve										prevent the possibility of
of protection pipe should						Protection		WALL		damaged by mouse.
be completely				sealed						Unless it seals completely,
						pipe
with	putty		to	avoid					Sleeve of	any air with high humidity
										flows from outdoor and
dripping of rain water into									protection
									pipe	any dew may drop.
the room.

Drain cap	Drain hose
Drain cap	Drain hose
Please insert	Please insert
until here	until here

!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.

Pipe	Openings
support

●	Turn the piping while holding down the lower
Pull up the pipe after	portion of pipe-support by hand.
bending downward

●Connect the connecting cord after removing electrical cover.

(Refer to “Connection of Power Cord”) about 15cm

●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.

Heat insulation pipe			Pull this to the	front	Protection pipe
			during the connection		Drain hose
		Connecting	of refrigerating	pipes
		cord	to ease task.
Refrigerating pipe					Connecting cord	Holder Connected section
3	Installation of Drain Hose
						!	CAUTION
						Be	sure that the
						drain hose is not
			Ditch	Condensed		loosely connected
				water pond		or bend.
	Bending	Condensed
	upwards	water pond

!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

CAUTION unit during installation. (Carelessness may result in water leakage.)

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