Hitachi RAK-70NHA1 Installation Manual

FOR SERVICE PERSONNEL ONLY
SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL

Indoor Unit

RAK-70NHA1

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.
!
Please request your sales agent or qualifi ed technician to install your unit. Water leakage, short circuit or fi re 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 fi re.
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 specifi ed 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 fi re.
Please use the specifi ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock
●
and fi re may occur.
Be sure to use the specifi ed piping set for R-410A. Otherwise, this may result in broken copper pipes or faults.
●
When installing or removing an air conditioner, only specifi ed 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 fi re, 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 fi re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
Unauthorized modifi cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualifi ed air
●
conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and fi re, etc.
!
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 fl ammable gas. The outdoor unit may
●
catch fi re if fl ammable gas leaks around it.
Please ensure smooth fl ow of water when installing the drain hose.
●
Piping shall be suitable supported with a maximum spacing of 1m between the supports.
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1

Installation of Hanger, Wall Penetration and Installation of Protection Pipe

CAUTION
!
The draining of the water container inside the indoor unit can be done from the
●
left. Therefore the hanger must be fi xed horizontally or slightly tilted towards the
side of drain hose. Otherwise, condensed water may overfl ow the water container.
Direct Mounting On The Wall
Please use hidden beams in the wall to hold the hanger.
●
External dimension of
indoor unit
1 0mm
200mm
0mm
ø 65mm 1 0mm
1030mm Drain Hose
Mounting
Plate
Screw for Mounting plate
Please use more
than 4 screws.

Procedures of Installation and Precautions

Procedures to fi x the hanger.
●
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
Hanger
Procedures to fi x the holder of remote control.
●
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
20mm

Wall Penetration and Installation of Protection Pipe

Drill a ø 65mm hole on
●
wall which is slightly tilted
Indoor Outdoor
towards the outdoor side.
Seal with
Drill the wall at a small
putty
Seal with
angle.
putty
Cut the protection pipe
●
according to the wall
thickness.
Empty gap in the sleeve
●
of protection pipe should
WALL
Protection
be completely sealed with
pipe
putty to avoid dripping of
Sleeve of
rain water into the room. protection
pipe
< >
IA100: A
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

+ – Screwdriver Measuring Tape
● ●
Saw ø 65mm Power Drill Hexagonal Wrench
● ● ●
Key ( 4mm) Wrench (14, 17, 22, 26, 27mm)
●
Gas Leakage Detector Pipe Cutter
● ●
Vinyl Tape Pliers Flare Tool
● ● ●
WARNING
CAUTION
2

Installation of the Indoor Unit

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
Protection
Pipe
Drain Hose

HOW TO REMOVE INDOOR UNIT FROM HANGER

Level
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
●
Line
Hole for pulled due to obstacles, etc. Remove front cover,
Mark
pipe
Weight 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.
3. Fix the hanger on wall
with 4.1 x 32 screw
HORIZONTAL PIPING
(As shown in fi gure below)
Preparation
Change of Drain Hose and Installation Procedures.
Exchange the location of drain hose and drain cap during horizontal piping as shown in
●
fi gure 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).
WARNING
! CAUTION
!
2 5mm
Be sure that the wire is not
HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS
in contact with any metal
in the wall. Please use
During horizontal or downward piping, use a knife to cut
the protection pipe as wire ●
openings as shown in fi gure. Then smoothen the edges of
passing through the hollow
part of the wall so as to openings with a fi le.
prevent the possibility of
Pipe
damaged by mouse.
support
Unless it seals completely,
any air with high humidity
flows from outdoor and
any dew may drop.

THE CHOICE OF MOUNTING SITE

The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.
●
No nearby heat source and no obstruction near the air outlet is allowed.
●
● The clearance distances from top, right and left are specifi ed in fi gure 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
Knife
●
fl uorescent 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.
Putty
●
Names of Indoor Components
No. Item
Hanger
1
Screw for Hanger
2
( 4 . 1 x 3 2 )
Holder for Remote Con-
troller
3
AAA Size Battery
4
Screw for holder of
Remote Controller
5
( 3 . 1 x 1 6 )
Insulation pipe
6
Remote Controller
7
Purifying Filter
8
Holder
9
Connecting cords,
pipe and drain hose
must be tied together
with Vinyl tape.
CAUTION
!
Hanger
Lift the body
Please pull the lower part of
Refrigerating
of the unit
Pipe
the Indoor unit outwards to
upwards and
Projection
check if the unit is hooked
then force
onto the hanger. Improper
it downwards.
i n s t a l l a t i o n m a y c a u s e
Connecting
vibration and noise.
Cord
Hook
Circle hole
Screw driver
2
Drain cap Drain hose
Drain cap
Drain hose
Please insert
Please insert
until here
until here
Condensed water may leak out if not inserted properly.
Turn the piping while holding down the lower
●
Pull up the pipe after
portion of pipe-support by hand.
bending downward
(Please note the following matters and obtain permission from customer before installation).
WARNING
!
CAUTION
!
Figure showing the Installation
The Length of Indoor Unit Con-
necting Cord
of Indoor and Outdoor Unit.
Qty
0. m
1.6m
1
Direction of Piping
6
Horizontally
perpendicular
to the unit
1
Connection
T h e r e a r e 6 d i r e c t i o n s
allowed, namely, horizontally
perpendicular to the unit,
2
vertically down from right,
horizontally out from right and
horizontally out to left.
2
above 100mm
Be sure to
completely
seal any gap
1
with putty.
1
1
1

INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION

The refrigerating pipes should be adjusted to fi t
●
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, fi t the connecting cord and pipes
●
into the space available under the indoor unit. Use
holder to hold them tight.
Insulation pipe
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.
THE CONNECTION OF REFRIGERATING PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
The refrigerating pipes and connecting cord
●
transform and are attached.
The end of the refrigerating pipes are at locations
●
marked with " " symbol.
Claw of indoor unit
1
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.
●
Heat insulation pipe
Pull this to the front
Connecting
during the connection
cord
of refrigerating pipes
Refrigerating pipe to ease task.
3

Installation of Drain Hose

Ditch
Openings
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 fl ow of condensed water of the Indoor
CAUTION
unit during installation. (Carelessness may result in water leakage.)
above 50mm
2
1
above 100mm
2,300mm or more
7
4
5
The indoor piping should be
insulated with the enclosed
3
Plug
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).
● 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.
inner diameter ø 16mm
Please use insulated drain hose for the indoor
piping (commercial product).
Drain hose
Pipe
Connecting cord
CAUTION
!
The rubber strap used for
●
fi xing the insulator should
not be tied with great force.
6
Otherwise, this will damage
heat insulation and causes
water condensation.
Pipe Rubber strap tied with great force
CAUTION
!
Please fi x in the plastic core
●
after fl aring to avoid plastic
chips entering the pipes.
below
5mm
Please bend at a small
radius to form an arc
Temporary stand
Projection
about 15cm
Protection
pipe
Drain hose
Connected
Connecting cord section
Holder
CAUTION
!
Be sure that the
drain hose is not
loosely connected
Condensed
water pond or bend.