Hitachi RAS-18SX8 Installation Manual

FOR SERVICE PERSONNEL ONLY
• Carefully read through the procedures of proper installation
before starting installation work.
• The sales agent should inform customers regarding the
correct operation of installation.
HITACHI SPLIT UNIT AIR CONDITIONER
INSTALLATION MANUAL Tools Needed For Installation Work
( mark is tool exclusive use for R410A) • ª · Screwdriver
INDOOR UNIT / OUTDOOR UNIT
• Measuring Tape • Knife • Saw • Pipe Cutter • Hexagonal Wrench
K e y ( 4 m m ) • P o w e r D r i l l ( ø 6 5 ~ ø 8 0 m m )
RAS-18SX8 / RAC-18SX8
• Vacuum Pump • Pliers or Wrench • Torque Wrench
RAS-25SX8 / RAC-25SX8
Vacuum Pump Adaptor Flare Tool
RAS-35SX8 / RAC-35SX8
Detector Manifold Valve Charge Hose
• Be sure to perform the cleaning unit operation check.
Installation information
• Unlike conventional types, this model has no grille on its top surface.
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. Make sure to connect earth line.
CAUTION ....... Improper installation may result in serious consequence. This sign indicates prohibition.
Be sure that the unit operates in proper condition after installation. Explain to customer the proper operation and maintenance of the unit
as described in the user's guide. Ask customers to keep this installation manual together with the instruction manual.
WARNING
• 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 installation 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 cables which are approved offi cial in your country. Be sure to use the specifi ed circuit. A short circuit and fi re may occur due to the use of
low quality wire or improper work.
• Be sure to use the specifi ed cables 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 to prevent the external force is being applied to the connection section of the terminal base. Improper insertion
and loose contact may cause over-heating and fi re.
• Please use the specifi ed components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fi re or stronger vibration
may occur.
• Be sure to use the specifi ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults.
• When installing or transferring an air conditioner to another location, make sure that air other than the specifi ed refrigerant (R410A) does not enter the
refrigeration cycle. If other air should enter, the pressure level of the refrigeration cycle may increase abnormally which could result in a rupture and injury.
• 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.
• Be sure to connect the earth line from the power supply wire to the outdoor unit and between the outdoor and indoor unit. Do not
connect the earth line to the gas tube, water pipe, lighting rod or the earth line of the telephone unit. Improper earthing may cause
electric shocks.
• When fi nishing the refrigerant collection (pumping down), stop the compressor and then remove the coolant pipe. If you remove the refrigerant pipe
while the compressor is operating and the service valve is released, air is sucked and a pressure in the freezing cycle system will build up steeply,
causing an explosion or injury.
• When installing the unit, be sure to install the refrigerant pipe before starting the compressor.
If the refrigerant pipe is not installed and the compressor is operated with the service valve released, air is sucked and the pressure level of the
refrigeration cycle may increase abnormally which could result in a rupture and injury.
CAUTION
• A circuit breaker must be installed in the house distribution box for the direct connected power supply cables to the outdoor unit. In case of other
installations a main switch with a contact gap or more than 3mm has to be installed. Without a circuit breaker, the danger of electric shock exists.
• 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. Improper installing may wet your furniture.
• An IEC approved power cord should be used. Power cord type: NYM.
— 1 —
Condensed Water Disposal of Outdoor Unit
• There is holes on the base of outdoor unit for condensed water to exhaust.
• In order to fl ow condensed water to the drain, the unit is installed on a stand or a block so that
the unit is 100mm above the ground, join the drain pipe as shown in the fi gure. Cover the other
Push
drain holes (2 places) with a bush. To install the bush, put it on the drain hole as shown in the
fi gure and press the both sides of the bush to fi t into the hole.
• After installation, check whether the drain pipe and bush cling to the base fi rmly.
Above
• Install the outdoor unit horizontally and make sure that condensate drains away. 100mm
Drain hole
• When using in areas with cold weather
Outer diameter:
Especially when there are heavy snows in areas with cold weather, condensed water may
above 16mm
freeze on the base and result in bad drainage. In such areas, please do not install the bush
and the drain pipe. Also, make sure that the distance from the drain hole to the ground is
250mm or more.
1. Installation of Mounting Board, Wall Penetration and Installation of Protection
Pipe
CAUTION
• The drain hose can be installed from the left or right of the Indoor unit. When installing the indoor unit, the
mounting board must be fi xed horizontally or slightly tilted down towards the side of drain hose.
If it is tilted above the side of the drain hose, condensed water may overfl ow.
1.1 Direct Mounting On The Wall
Level
• Please use hidden beams in the wall to hold the
mounting board.
• When it is diffi cult to look for a stud, use an item such
Mounting board
as board anchor (commercial product).
Mark
• When using the mounting hole provided by the
apartment, cut it in such manner that the dimension of
the mounting anchor projecting from the wall is 15mm
or below.
Hole for pipe
Line Weight
Drill Hole for Board Anchor
Screw at the positions near the upper and lower hooks where the indoor
unit is hung. Use more than 4 screws for fi xing.
• While placing the mounting board
on the wall, embed the board
anchor in the wall.
• Slide down the mounting plate and
then fi x the mounting board with the
board anchor.
798mm
480mm 158mm
External
450mm
dimension of
450mm
indoor unit
174mm 100 mm
81.5mm 81.5mm
ø80mm
600mm
ø65mm ø65mm
Drain hose
348mm
635mm
— 3 —
< S842 : A >
THE CHOICE OF MOUNTING SITE (Please note the following matters and obtain permission from customer before installation.)
WARNING
• The unit should be mounted at stable, non-vibratory location which • The outdoor unit must be mounted at a location which can support heavy
can provide full support to the unit. weight. Otherwise, noise and vibration will increase.
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 specifi ed as • The air blown out of the unit should not point directly to animals or
Û in fi gure below. plants.
• The location must be convenient for water drainage and pipe • The clearances of the unit from top, left, right and front are specifi ed as
connection with the outdoor unit. Û in fi gure below. At least two sides must be clear for ventilation.
Gas Leakage • Do not install at a location where there is fl ammable gas, steam, • Be sure that the hot air blown out of the unit and noise do not disturb the
oil and smoke. There is a risk of fi re, explosion, deterioration of neighbourhood.
resin and/or damage. • Place not exposed to strong wind
• To avoid interference from noise, please place the unit and its Particularly on the rooftop of a building, strong wind blows and the outdoor
remote controller at least 1m from the radio and television. unit may be damaged.
• To avoid any error in signal transmission from the remote controller, • Do not install at a location where there is fl ammable gas, steam, oil and
please put the controller far away from high-frequency machines smoke.
and high-power wireless systems. • The location must be convenient for water drainage.
• Lighting fi xtures with electronic starters may shorten the reception • Place the outdoor unit and its connecting cord at least 1m away from the
distance and may even interfere with the signal being received. antenna or signal line of television, radio or telephone. This is to avoid
noise interference.
• Do not install the indoor unit in a place where small animals may build
The indoor unit (air outlet) should be installed at least 1.5m away
their nests. If small animal goes inside the unit and touches the electrical
from fi re alarm.
parts, failure of the unit, smoke or fi re may be caused. Request your
customer to keep the surrounding of the unit clean.
No. Supplied Items Qty Figure showing the installation of Indoor and Outdoor Unit (For example: Ground installation)
Mounting board
Above 50mm (Above 100mm when there is piping connection at the back of the outdoor unit)
1 1
1
Be sure to com pletely seal Above 50mm
any gap with putty.
Screw for mounting
2 board
5
The space indicated by an
arrow Û is to guarantee
Remote controller
the performance of the
holder
3 1 air conditioner. Install the
apparatus at the ample
space in order to carry out
AAA size battery the maintenance and repair
works.
4 2
The indoor piping should be
Screw for remote insulated with the enclosed
5 controller holder insulation pipe.
2
6
4
Remote controller
6
1
3
5
Anti-mold wasabi
7 cassette 1
Above 200mm
Above 50 mm when installed
Bush
8 2 on the ceiling of balcony Above 50mm
give clearance as
wide as possible
Drain pipe
9
1 Above 200mm
Above 100mm
Binding band
Above 200mm
0 1
Heating effi ciency will be
enhanced if the space below the
outdoor unit is closed so that
Items 8 & 9 are included in the
For outdoor unit installation, allow at least
no air passes through.
package of the outdoor unit.
(Procure the material locally.) 2 sides of space around the unit to ensure
ventilation fl ue.
Length of Power Cable
About 0.9m About 1.6m
Do not modify the power cable.
— 2 —
1.2 Wall Penetration and Installation of Protection Pipe
1 Drill a ø65mm hole on wall
Drain hole
Indoor
which is slightly tilted towards Outdoor • Protection pipe (commercial product) must be used
8 Bush WALL
the outdoor side.
Be sure that the wire is not in contact with any metal in the
Push
Putty
wall. Please use the protection pipe as wire passing through
2 Cut the protection pipe Putty
according to the wall thickness the hollow part of the wall to prevent damaged by mouse,
and pass through the wall possibility of short circuit or fi re.
hole.
• Completely seal with putty
8 Bush
3 Empty gap in the sleeve of High humidity air inside the wall or the outdoor may go in to
Protection
9 Drain pipe
Sleeve of
protection pipe should be pipe the room and could result in dripping of dew. It could also
protection
completely sealed with putty
cause smell or odor present outdoor and inside the wall
pipe
to avoid dripping of rain water spreading into the room.
into the room.
2. Installation of the Indoor Unit
2.1 Preparation of Installation
Remove the front panel Changing of drain hose
(Horizontally piping)
• To remove front panel, please refer to "Removing and
Attaching the Front Panel" on page 13. • Install and change the drain hose and drain cap when installing
• Make sure to use both hands to attach and remove the front the pipe horizontally as shown below.
panel. • Remove the lower cover when installing and changing.
• Do not carry out horizontal piping for drain hose.
Remove the lower cover
• Push the bottom inner part (1) of the lower cover to remove
Board anchor the lower cover.
2 Screw for
mounting board
1
Remove
• To attach the lower cover, attach 2 fi rst and then attach 1
by rotating it around 2 as the fulcrum.
2
Drain hose screw
1
1 Remove the screw and
Attach
pull out the drain hose.
Wiring connection
• Please refer to "Connection of Power Cord" on page 10.
Cutting lower cover bush
(Horizontal and downward piping)
• While installing the pipe from the right, left or bottom side,
use a knife to cut lower cover bush accordingly.
• Use the groove on the outer side if the pipe which is to be
installed from the left side, etc. is big.
2 Insert drain cap up to the
location securely till the
cap stops.
ø65mm
• Be sure to insert drain hose and drain cap fi rmly and
Bush part
fi x with screw
Groove on the
Insuffi cient insert may result in water leakage.
outer side Bush part
Groove on the inner side
— 4 —
Preparation of Pipe
WARNING
Backward piping
1 Remove the auxiliary insulation material sheet which is
attached to the pipe insulation.
CAUTION
2 Referring to the mark on the rear side, form the pipe within
the wall hole range.
Place the starting point
of refrigerating pipe
bending within the wall Wall hole range
hole range.
Please bend at a small
radius to form an arc.
If the starting point of refrigerating pipe bending is projected
from the wall hole range or if the bending radius is too large,
the indoor unit may be lifted from wall and this may cause
poor fi nishing.
Pipe support
Pipe support
Center line of wall hole
Refrigerating pipe
36mm
∼
Place the
41mm
refrigerating
pipe bending
Place the
Drain
within the wall
ending point of
2 hose
hole range
Auxiliary insulation
refrigerating pipe
Above 50mm sheet
bending within
this range.
3 Temporary join the refrigerating pipe, drain hose and
Above 80mm connecting cord together with tape.
When installing the indoor unit
above the curtain rail or curtain
box, allow dimensions not
affecting the airfl ow.
Temporary join the refrigerating pipe,
drain hose and connecting cord
together with tape.
The refrigerating machine oil is easily affected
by moisture. Use caution to prevent water from
Pipe support
entering the cycle.
Center line of wall hole
• The difference in height between the indoor and Refrigerating pipe
outdoor unit should be kept below 10m.
ø65 wall
• The connecting pipe, no matter big or small,
Pipe hole range
should all be insulated with insulation pipe and
Place the
then wrapped with vinyl tape. The insulator will
refrigerating
deteriorate if it is not wrapped with tape.
pipe bending
Drain within the wall
hose hole range
Connecting
Connection of insulated drain hose Drain hose
Please use insulated drain hose cord
Inner diameter
for the indoor piping (commer cial 16mm
4 Wrap the wall hole portion with tape.
product).
Direction of Piping
Horizontally
backward
Piping confi guration may be in six
different directions: direct rear piping,
left or right downward piping and left
Wrap with tape
or right sideways piping.
Connecting the refrigerating pipe at the back of the
WARNING
indoor unit
1 Remove the auxiliary
Projection
insulation material sheet
of the
which is attached to the indoor unit
pipe insulation. (Keep
the removed auxiliary
insulation material sheet
About 15cm
because it will be reused
after pipe connection.)
2 Hang the indoor unit on the mounting board.
3 Place the cushion under the right rear surface of the indoor
unit to lift the lower side of the unit by approximately 15cm.
4 Connect the refrigerating pipe. (Refer to "Pipe Connection"
on page 9)
5 Cover the pipe connection with the auxiliary insulation sheet
which was removed earlier, with its split line on the top.
Wrap the tape without any gap. (Refer to "Installation after
connection of refrigerating pipes (Horizontal piping)" on page
5, step 3)
6 Insert the drain hose into the wall hole.
7 Connect the connecting cord. (Refer to "Connection of Power
Cord" on page 10).
8 Form connecting cord and refrigerating pipe and put them in
the space on the lower side of the rear surface of the indoor
unit.
9 Remove the temporary stand and hook the projection on the
lower part of the Indoor unit onto the mounting board.
Drain cap Drain hose
Drain hose Use the plier to pull and
turn the drain cap for easy
removal.
Protection pipe
Drain hose
Auxiliary insulation
sheet
Pull this to the front during
Connection part
the connection of refrigerating
pipe to ease task. Connecting cord
Drain hose
Auxiliary insulation
sheet
Refrigerating pipe
Drain hose screw
Connecting cord
Push the drain hose deeply
Drain
cap
into the screw hole, fi x with
CAUTION
the removed screw during
step 1.
• Do not over tighten vinyl tape on pipe heat insulation
sheet
Do not over tighten to avoid loss of heat insulating effect
and dew condensation.
CAUTION
• Pull the lower part of the indoor unit towards you
and confi rm that the tab of the indoor unit is fi t in the
installation plate
If the tab is not fi tted in securely, vibration of the indoor unit
becomes stronger.
4 Form the refrigerating pipe according to the wall hole
Horizontally and downward piping from the right
position.
1 Remove the auxiliary insulation material sheet which is
Especially in the case of horizontally backward piping,
attached to the pipe insulation. (Keep the removed auxiliary
follow the instruction below to carry out accurate forming.
insulation material sheet because it will be reused after pipe
connection.) Forming of refrigerating pipe for horizontally backward
2 Carry out refrigerating pipe forming. piping
Bottom cover (1) Refer to the mark at the back, start bending the
Pipe
bush hole
refrigerating piping within wall hole range.
Drain hose
Layout of horizontally piping from the right
3 Temporary join the refrigerating pipe, drain hose and
connecting cord with tape.
CAUTION
If the starting point of refrigerating pipe bending is
• Transform the piping while holding down the lower portion
projected from the wall hole range or if the bending
of pipe-support by hand.
radius is too large, the indoor unit may be lifted from
wall and this may cause poor fi nishing.
(2) When forming, bend the refrigerating pipe with the
smallest radius.
ø65 wall
ø65 wall hole
hole range Transform after Center line of
range wall hole
bending downward
Pipe support
Installation after connection of refrigerating pipes
(Horizontal piping)
Refrigerating
pipe
1 Remove the auxiliary insulation material sheet which is
attached to the pipe insulation. Connect the refrigerating pipe.
(Refer to "Pipe Connection" on page 9)
2 Cut the heat insulation sheet refrigerating pipe aligning to
the insulation sheet of the pipe and fi x them temporarily with
tape.
3 Cover the pipe connection with the auxiliary insulation sheet
which was removed earlier, with its split line on the top. Wrap
the tape without any gap. Tape must not be over tightened.
5 Form the connecting cord and refrigerating pipe and put
(Refer to "Heat insulation and Finishing of Piping" on page 11)
them in the space on the lower side of the rear surface
If there is gap or over-tightened, it may cause condensation.
of the indoor unit. Put the binding band 0 on the hook
located on the rear surface to fi x it.
6 Join refrigerating pipe, connecting cord and drain hose
temporarily with tape and wrap the wall hole portion with
tape.
Refrigerating pipe Refrigerating
Cut
insulation sheet
pipe
Auxiliary insulation sheet
Refrigerating
pipe
0 Binding band
Refrigerating pipe
About 90mm
insulation sheet
Temporarily Binding band can be
wrap with tape
installed to whichever
side of the installation
points. However, it is
recommended to attach it
on the right side viewing
Auxiliary insulation from the rear.
sheet
Split line of the auxiliary
insulation sheet must
Be sure to cut the extra binding band.
be positioned within this
(Otherwise, it may result in abnormal noise or dewfall.)
range.
Pipe
— 5 —
How to remove the indoor unit
• Push the [PUSH] section at the bottom of the indoor unit
from the outside, the claws are released from the mounting
Cushion board. (2 places on the left and right)
• If the bottom of the indoor unit cannot be pushed, remove
Fixing
the bottom part of the front cover and insert a screwdriver
tab
into the hole for removal of indoor unit as shown in the
fi gure. Then, push the claws upwards while holding down
the upper part of the hole 1 and pull the indoor unit towards
you 2. When horizontal piping is used, be careful not to
damage the pipe and connecting cord with the tip of the
screwdriver during this operation. Ditch
• Please refer to "Removing and Attaching the Front Cover"
on page 14 to remove the bottom part of the front cover.
• 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.
Hole for removal
Reinstall the side cover in reverse order of the
removal.
Hold with hand
Mounting board
1
Claw
Hole for removal
2
Screwdriver
3. Drainage Check
After the indoor unit is installed, please ensure the smooth Fixed leg dimension of outdoor unit
fl ow of condensed water of the indoor unit during installation.
(Careless work may result in water leakage.)
CAUTION
• During drainage work, install the drain pipe to ensure
smooth drainage. Make sure to carry out drainage
check.
Careless work may result in water leakage.
• Make sure that there is no problem as shown in the
fi gures on page 8.
Such problems may cause clogged drain and could result
in water leakage.
• Drain hose must be at a slope of at least 1/25.
• When inserting the drain hose into the drain pipe for
• Do not touch the suction port, bottom surface
embedded piping, etc., do not cut the drain hose in the
or aluminium fi n of the outdoor unit
middle.
Failure to do so may cause an injury.
This may lead to poorer heat insulating performance of the
drain hose and could result in water leakage.
• Do not lead the drain hose to a place where corrosive
gas (sulfur, ammonia, etc.) is generated such as septic
tank.
Corrosive gas may fl ow into the indoor unit through the drain
hose, and could result in corrosion on the copper pipe and
odor in the room.
— 7 —
Connecting the refrigerating pipe at the back of the
indoor unit
• Form and set the refrigerating pipe and connecting cord.
Match the end of the refrigerating pipes with the
locations marked with "4" symbol.
Small
Large diameter
diameter
Please bend at a small
radius to form an arc.
1.00m
Place the starting point of
refrigerating pipe bending within
the wall hole range.
Below 5mm
Insert polyester core (commercial product)
into the large diameter pipe.
Please bend at a small radius to form an arc. (Pipe can be bent
with a small radius without being crushed if polyester core is used.)
CAUTION
• When using a polyester core, make sure to insert it only
after fl aring is carried out to avoid cutting dust from
getting inside.
2.2 Installation
Drain
Refrigerating
Connecting the refrigerating pipe other than at the back
hose pipe
of the indoor unit
1 Insert the pipes through the wall hole.
2 Hang the upper part of the Indoor unit on the mounting
board.
3 Push the lower part of the indoor unit to the wall, hook
the projection on the lower part of the Indoor unit onto the
mounting board.
4 Cover the pipe connection with the auxiliary insulation sheet
which was removed earlier, with its split line on the top. Wrap
the tape without any gap. (Refer to "Heat insulation and
Finishing of Piping" on page 11)
If there is gap or over-tightened, it may cause condensation.
1 Mounting board
1
Refrigerating pipe
Protection pipe
Connecting cord
Hook Drain hose
2
Wrap with tape
1 Mounting board
Projection of the indoor unit
3
— 6 —
CAUTION
Be sure that the drain hose is loosely connected
Condensed bend or proper condition like left fi gure.
Bending water pond
upwards
CAUTION
You are free to choose the side (left or right) for
the installation of drain hose. Please ensure the
Condensed
smooth fl ow of condensed water of the indoor unit
water pond
during installation. (Careless may result in water
leakage.)
Please remove side cover
when connecting the piping
Please face this side (suction side)
and connecting cord.
of the unit to the wall.
Pull
downward
In snowy region, install a snow guard and elevated stand
to ensure the airfl ow for better heating effi ciency.
In other regions, it is recommended to install a tent for
Unit: mm
Fixed leg
57 shade.
Tent
12
39
500 125
CAUTION
Elevated stand
— 8 —