Hitachi RAS-25CNH2 Installation Manual

FOR SERVICE PERSONNEL ONLY
HITACHI SPLIT-UNIT AIR CONDITIONER
INSTALLATION MANUAL
Indoor Unit Outdoor Unit
RAS-25CNH2 RAC-25CNH2

SAFETY PRECAUTION

G Read the safety precautions carefully before operating the unit.
G 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.
!
G
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.
G
Please observe the instructions stated in the installation manual during the process of installation. Improper
installation may cause water leakage, electric shock and fire.
G
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.
G
Observe the rules and regulations of the electrical installation and the methods described in the installation manual
when dealing with the electrical work. Use only power cables which are approved from the Authorities of your
country. A short circuit and fire may occur due to the use of low quality wire or improper work.
G
Be sure to use approved cables also for the connection indoor/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.
G
Please use the specified components for installation work. Otherwise, the units may collapse or water leakage,
electric shock and fire may occur.
G
Do not mix any coolant other than R-22 into the cooling circulation path when mounting or shifting the unit. If it
is mixed with air, the high pressure in the circulation path will rise and this may result in broken copper pipes or
faults.
!
G
This is a stationary class 1 appliance. The electrical installation should be installed fixed by using IEC approved
power cables. In the installation a main switch must be used with an opened contact gap of more than 3mm.
G
Piping shall be suitable supported with a maximum spacing of 1m between the supports.
G
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.
G Please ensure smooth flow of water when installing the drain hose.
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.
G
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.
G
External Dimension
of Indoor unit
20mm
20mm
62mm
ø65mm 80mm 95mm
798mm
Procedures of Installation and Precautions
Procedures to fix the hanger.
G
1. Drill holes on wall. 2. Push plug into the holes.
(As shown below) (As shown below)
Wall
1 Hanger
2 Screw
32mm
Wall
G 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
19mm
Plug
Wall Penetration and Installation of Protection Pipe
G Drill a ø 65mm hole on wall
which is slightly tilted
towards the outdoor side. Indoor
Drill the wall at a small angle.
G Cut the protection pipe
according to the wall
thickness.
G Empty gap in the sleeve of
WALL
protection pipe should be
Sleeve of
Protection
protection
completely sealed with putty
pipe
pipe
to avoid dripping of rain
water into the room.
< >
I141: C
G Carefully read through the procedures of proper
installation before starting installation work.
G The sales agent should inform customers regarding
the correct operation of installation.
Tools Needed For Installation Work
G + – Screwdriver G Measuring Tape
G Saw G ø 65mm Power Drill G Hexagonal Wrench
Key ( 4mm) G Wrench (14, 17, 19, 22mm)
G Gas Leakage Detector G Pipe Cutter
G Vinyl Tape G Pliers G Flare Tool
WARNING
CAUTION
2 Installation of the Indoor Unit
VERTICALLY DOWNWARD PIPING
Preparation
G Connect connecting cord.
G Pull out the pipe, connecting cord and
drain hose.
Installation
The upper part of the indoor unit is hanged on the hanger.
G
G The projection at the lower part of the indoor unit is
hooked onto the hanger.
Hanger
Refrigerating
Pipe
Protection
Pipe
Drain Hose
Level
HORIZONTAL PIPING
Hanger
Preparation
Change of Drain Hose and Installation Procedures.
Hole for
G Exchange the location of drain hose and drain cap during horizontal piping as shown
Line
pipe
Mark in figure below. Be sure to plug in the drain hose until the insulating material folds upon
Screw for Hanger Weight
Please use more
itself.
than 4 screws.
G Please use pliers to pull out the drain cap.
(This is an easier way to remove the drain cap).
3. Fix the hanger on wall
with 4.1 x 32 screw
(As shown in figure below)
Ceiling
above 50mm
Plug
4.1 x 32 Screw
Drain cap
G Remove the cap for drain hose installation
! CAUTION
HORIZONTAL & DOWNWARD PIPING – MAKING OPENINGS
Outdoor
CAUTION
!
2~5mm
G During horizontal or downward piping, use a knife to cut
Be sure that the wire is not
openings as shown in figure. Then smoothen the edges
in contact with any metal of openings with a file.
in the wall. Please use the
protection pipe as wire
Seal with
putty
passing through the hollow
part of the wall so as to
Pipe support
prevent the possibility of
damaged by mouse.
THE CHOICE OF MOUNTING SITE
G
The unit should be mounted at stable, non-vibratory location which
can provide full support to the unit.
G
No nearby heat source and no obstruction near the air outlet is
allowed.
G
The clearance distances from top, right and left are specified in
figure below.
G Knife
G
The location must be convenient for water drainage and pipe
connection with the outdoor unit.
G
To avoid interference from noise please place the unit and its
remote controller at least 1m from the radio and television.
G
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.
Names of Indoor Components
No. Item
Hanger
1
Screw for Hanger
2
( 4 . 1 x 3 2 )
Holder for Remote
Controller
3
AAA Size Battery
4
Screw for holder of
5
Remote Controller
( 3 . 1 x 1 6 )
Holder
6
Insulation pipe
7
Remote Controller
8
Drain Pipe
9
Purifying Filter
0
Seal
!
@
Bush
Connecting cords,
pipe and drain hose
must be tied together
with Vinyl tape.
!
Please pull the lower part
Hanger of the
Lift the body
of the unit outwards to check if the
upwards and unit is hooked onto the
Projection
then force
hanger.
it downwards.
installation may cause
Connecting
vibration and noise.
Cord
Hook
Drain cap Drain hose
Drain hose
Drain cap
Drain hose
Please insert
Please insert
until here
until here
Condensed water may leak out if not inserted properly.
G Transform the piping while holding down the lower
Transform after
portion of pipe-support by hand.
bending downwa
(Please note the following matters and obtain permission from customer before installation).
WARNING
!
G
The outdoor unit must be mounted at a location which can sup-
port heavy weight. Otherwise, noise and vibration will increase.
CAUTION
!
G
Do not expose the unit under direct sunshine or rain. Besides,
ventilation must be good and clear of obstruction.
G
The air blown out of the unit should not point directly to animals
or plants.
G
The clearances of the unit from top, left, right and front are specified
in figure below. At least 3 of the above sides must be open air.
G
Be sure that the hot air blown out of the unit and noise do not
disturb the neighbourhood.
G
Do not install at a location where there is flammable gas, steam,
oil and smoke.
G
The location must be convenient for water drainage.
G
Place the outdoor unit and its connection wire at least 1m away
from the antenna or signal line of television, radio or telephone.
This is to avoid noise interference.
The Length of Indoor Unit
Connecting Cord
Qty
about
0.9m
about 1.6m
1
Figure showing the Installation
of Indoor and Outdoor Unit.
6
Cut away shaded
portion, and finish
the edge of the
20 opening so that
1 there is no burr.
Be sure to
Direction of Piping
completely
seal any
gap with
2
Horizontally
putty.
perpendicular
to the unit
Connection
2 There are 3 directions
allowed, namely, horizontally
perpendicular to the unit,
vertically down from right,
horizontally out from right.
1
Don't form the piping
downward at the left of the unit.
Dimension of Mounting Stand
1
of the outdoor unit
(unit : mm)
35
mounting stand
12
1
35
500
100
1
above 200mm
above 50mm when
installed on the
ceiling of balcony
1
1
above 100mm
❈ above 300mm
2
INSTALLATION OF REFRIGERATING PIPES AFTER CONNECTION
The refrigerating pipes should be adjusted to fit into
G
the hole on the wall and then ready for further
connection.
G The terminals of 2 connected pipes must be covered
with insulator used for terminal connection. Then the
pipes are wrapped with insulation pipe.
G Connect the connecting cord.
G After adjustment, fit the connecting cord and pipes
into the space available under the indoor unit. Use
holder to hold them tight.
CAUTION
Insulation pipe
indoor unit
Holder
6
Pipe
Insulation pipe (must be wrapped with
Improper
vinyl tape at every 120mm).
THE CONNECTION OF REFRIGERATING PIPE DURING THE
INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
G Refrigerating pipes and connecting cord must be
tied together.
G The front part of the refrigerating pipes are
at locations marked with " " symbol.
0.85m
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.
G Place the drain hose through the hole on the wall.
G Insulate the connecting portion of refrigerating pipe with
insulator.
Wrap the refrigerating pipes with insulation pipe.
G
G Connect the connecting cord.
G After adjustment, the connecting cord and refrigerating pipes
are placed into the space available under the cooling unit.
The projection of indoor unit must hook to the hanger.
G
Heat insulation
pipe
Pull this to the front
during the connection
Refrigerating pipes
of refrigerating pipes
Connecting cord to ease task.
3 Installation of Drain Hose
Bending Condensed
Openings
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.)
WARNING
!
CAUTION
!
above 50mm
2
1
above 100mm
above 100mm
6
Used in horizontal piping
8
4
5
The indoor piping should be
3
insulated with the enclosed
Plug
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).
G The difference in height
between the indoor and
outdoor unit should be
kept below 5m.
❈ above 100mm
G The connecting pipe, no
matter big or small,
should all be insulated
❈ give clearance
with insulation pipe and
as wide as possible
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
above 200mm
Please use insulated drain
hose for the indoor piping
(commercial product).
Drain hose
Pipe
Connecting cord
CAUTION
!
The rubber strap used for
G
fixing the insulator should
not be tied with great force.
7 Otherwise, this will damage
heat insulation and causes
water condensation.
Pipe Rubber strap tied with great force
CAUTION
!
Please fix in the plastic
G
core after flaring to avoid
plastic chips entering the
pipes.
below
5mm
Please bend at a small
radius to form an arc
Temporary stand
Projection
Hook
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
Ditch
or bent.