Hitachi RAK-18PSB Installation Manual

FOR SERVICE PERSONNEL ONLY
EN
• Carefully read through the procedures of proper installation
before starting installation work.
• The sales agent should inform customers regarding the
HITACHI SPLIT UNIT AIR CONDITIONER correct operation of installation.
INSTALLATION MANUAL
INDOOR UNIT / OUTDOOR UNIT
RAK-18PSB/RAC-18WSB
RAK-25PSB/RAC-25WSB
RAK-35PSB/RAC-35WSB
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.
Make sure to connect earth line.
This sign in the figures 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 a customer to keep this installation manual together with the instruction manual.
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 installation 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 cables which are approved official in your country. Be sure to use the specified circuit. A short circuit and
fire may occur due to the use of low quality wire or improper work.
Be sure to use the specified 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 fire.
Please use the specified components for installation work. Otherwise, the unit may collapse or water leakage, electric shock, fire or
stronger vibration 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 transferring an air conditioner to another location, make sure that air other than the specified 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 fire, 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 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.
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 finishing 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.
The electric cables should neither be reworked nor added.
Make sure to use an exclusive circuit breaker.
Otherwise fire or electric shock might occur by connection failure, isolation failure or over current.
Make sure to connect cables to terminal properly and terminal cover should close firmly.
Otherwise, over heating at terminal contact, fire or electric shock might occur.
Make sure that there is no dust on any connected points of electric cables and fix firmly.
Otherwise, fire or electric shock might occur.
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 of 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 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. Improper installing may wet your funiture.
An IEC approved power cord should be used. Power cord type: NYM.
above
100mm
When Using and Installing In Cold Areas
Press it into the
hole in the chassis
1.1 on
Please use hidden beams in the wall to hold the hanger.
798mm
Dimensions of 450mm
indoor unit
450mm 100mm
175mm
80mm 600mm 80mm
Drain hose
350mm
638mm
Screw fixing
the mounting
board
Board
Leveler
anchor
Screw the hanger at the
positions possibly near the
upper and lower hooks where
Mounting
board
the indoor unit is hung. Use 4 or
Mark
more screws to fix the hanger.
Line Weight Pipe hole
1.2 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 with
(As shown below) (As shown below) 4.1 x 32 screw.
(As shown in figure below)
Wall
Hanger Plug
Ceiling
Screw (Procure
locally)
Wall
32mm
No nearby heat source and no obstruction near the air outlet is allowed.
The air blown out of the unit should not point directly to animals or plants.
Do not install at a location where there is flammable gas, steam, oil and smoke.
The installation height should be at least 2.3m or more from the floor.
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
Be sure to com pletely seal
Above 50mm
any gap with putty.
Screw for mounting
board
The space indicated by an
arrow Á is to guarantee
the performance of the
AAA size battery air conditioner. Install the
apparatus at the ample
space in order to carry out
the maintenance and repair
works.
Screw for Remote
Controller Holder The indoor piping should be
insulated with the enclosed
insulation pipe.
5
Remote controller Plug
@
4
Anti-mold wasabi
3
cassette
Heat insulating materials Above 200mm
Above 50 mm when installed
on the ceiling of balcony
Above 50mm
give clearance as
Bush
widely as possible
Above 200mm
Drain pipe Above 100mm
Above 200mm
Remote Controller Holder Heating efficiency will be
enhanced if the space below the
@
outdoor unit is closed so that
no air passes through. For outdoor unit installation, allow at least
2 sides of space around the unit to ensure
(Procure the material locally.)
ventilation flue.
Items 8 & 9 are included in the
package of the outdoor unit.
1.3 Wall Penetration and Installation of Protection Pipe
Drill a ø65mm hole on wall
which is slightly tilted towards Indoor Outdoor • Protection pipe (commercial product) must be used
WALL
the outdoor side. Be sure that the wire is not in contact with any metal in the
Putty
wall. Please use the protection pipe as wire passing through
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 fire.
hole. • Completely seal with putty
Empty gap in the sleeve of High humidity air inside the wall or the outdoor may go in to
Protection
Sleeve of
BUSH pipe
protection pipe should be the room and could result in dripping of dew. It could also
protection
Press it into the
completely sealed with putty cause smell or odor present outdoor and inside the wall
hole in the chassis pipe
to avoid dripping of rain water spreading into the room.
DRAIN PIPE
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
• Install and change the drain hose and drain cap when installing
Attaching the Front Panel" on page 13.
the pipe horizontally as shown below.
• Make sure to use both hands to attach and remove the front
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
the lower cover.
Drain cap
1
Drain hose
Remove
• To attach the lower cover, attach 2 first 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.
• Be sure to insert drain hose and drain cap firmly and
Bush part
fix with screw
Groove on the
Insufficient insert may result in water leakage.
outer side Bush part
Groove on the inner side
Preparation of Pipe
Backward piping
Remove the auxiliary insulation material sheet which is
attached to the pipe insulation.
Referring to the mark on the rear side, form the pipe within
the wall hole range.
Place the starting point
of refrigerating pipe
Wall hole range
bending within the wall
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 finishing.
Pipe support
Pipe support
Center line of wall hole
Refrigerating pipe
ø65 wall
hole range
36mm
2 Place the
41mm
refrigerating
Above 50mm
pipe bending
Place the
Drain
within the wall
ending point of hose
hole range
Auxiliary insulation
refrigerating pipe
sheet
bending within
this range.
2.3m or more
Above 80mm Temporarily join the refrigerating pipe, drain hose and
When installing the indoor unit connecting cord together with tape.
above the curtain rail or curtain
box, allow dimensions not
affecting the airflow.
Temporarily join the refrigerating pipe,
The refrigerating machine oil is easily affected
by moisture. Use caution to prevent water from drain hose and connecting cord
together with tape.
entering the cycle.
• The difference in height between the indoor and Pipe support
outdoor unit should be kept below 10m.
Center line of wall hole
• The connecting pipe, no matter big or small,
should all be insulated with insulation pipe and
Refrigerating pipe
then wrapped with vinyl tape. The insulator will
ø65 wall
deteriorate if it is not wrapped with tape.
Pipe hole range
Place the
Connection of insulated drain hose
refrigerating
Please use insulated drain hose
Inner diameter pipe bending
for the indoor piping (commer cial 16mm Drain within the wall
hole range
product). hose
Connecting
Drain hose
cord
Wrap the wall hole portion with tape.
Direction of Piping
Horizontally
backward
Piping configuration may be in six
different directions: direct rear piping,
left or right downward piping and left
or right sideways piping.
Wrap with tape
Connecting the refrigerating pipe at the back of the
WARNING
indoor unit
Remove the auxiliary
Projection
insulation material sheet Cushion
of the
which is attached to the indoor unit
Fixing
pipe insulation. (Keep
tab
the removed auxiliary
insulation material sheet
About 15cm
because it will be reused
after pipe connection.)
Hang the indoor unit on the mounting board.
Place the cushion under the right rear surface of the indoor
unit to lift the lower side of the unit by approximately 15cm.
Connect the refrigerating pipe. (Refer to "Pipe Connection"
on page 9)
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 )
Insert the drain hose into the wall hole.
Connect the connecting cord. (Refer to "Connection of Power
Cord" on page 10).
Form connecting cord and refrigerating pipe and put them in
the space on the lower side of the rear surface of the indoor
unit.
Remove the temporary stand and hook the projection on the
lower part of the indoor unit onto the mounting board.
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
Push the drain hose deeply
Drain Connecting cord
cap into the screw hole, fix 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 confirm that the tab of the indoor unit is fit in the
installation plate
If the tab is not fitted in securely, vibration of the indoor unit
becomes stronger.
Form the refrigerating pipe according to the wall hole
Horizontally and downward piping from the right
position.
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
piping
Carry out refrigerating pipe forming.
Bottom cover
Pipe (1) Refer to the mark at the back, start bending the
bush hole
refrigerating piping within wall hole range.
Please bend at a small
radius to form an arc.
Drain hose
Layout of horizontally piping from the right
Place the starting point of
Temporarily join the refrigerating pipe, drain hose and
refrigerating pipe bending within
connecting cord with tape.
the wall hole range.
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 finishing.
(2) When forming, bend the refrigerating pipe with the
smallest radius.
ø65 wall hole Center line of
Transform after
range
bending downward wall hole
Pipe support
Installation after connection of refrigerating pipes
(Horizontal piping) Drain
Refrigerating
hose
pipe
Remove the auxiliary insulation material sheet which is
attached to the pipe insulation. Connect the refrigerating pipe.
(Refer to "Pipe Connection" on page 9)
Cut the heat insulation sheet refrigerating pipe aligning to
the insulation sheet of the pipe and fix them temporarily with
tape.
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.
(Refer to "Heat insulation and Finishing of Piping" on page 11)
If there is gap or over-tightened, it may cause condensation.
5 Form the connecting cord and refrigerating pipe and put
them in the space on the lower side of the rear surface
of the indoor unit. Put the binding band on the hook
located on the rear surface to fix it.
6 Join refrigerating pipe, connecting cord and drain hose
Refrigerating pipe
Refrigerating
Cut
temporarily with tape and wrap the wall hole portion with
insulation sheet pipe
tape.
Auxiliary insulation sheet Refrigerating
pipe
Refrigerating pipe
Binding band
About 90mm
insulation sheet
Temporarily
Binding band can be
wrap with tape
installed to whichever
side of the installation
Wrap with tape
points. However, it is
recommended to attach it
on the right side viewing
Auxiliary insulation
Split line of the auxiliary from the rear.
sheet
insulation sheet must
be positioned within this
Be sure to cut the extra binding band.
range.
(Otherwise, it may result in abnormal noise or dewfall.)
Pipe
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
board. (2 places on the left and right)
• If the bottom of the indoor unit cannot be pushed, remove
the bottom part of the front cover and insert a screwdriver
Bending
into the hole for removal of indoor unit as shown in the upwards
figure. 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 Condensed
water pond
• 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
Hole for removal Claw
Screwdriver
3. Drainage Check
Fixed leg dimension of outdoor unit
After the indoor unit is installed, please ensure the smooth
flow 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
figures on page 8.
Such problems may cause clogged drain and could result
in water leakage.
CAUTION
• 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 fin 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 flow into the indoor unit through the drain
hose, and could result in corrosion on the copper pipe and
odor in the room.
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 "V" symbol.
Small
Large diameter
diameter
1.00m
Below 5mm
Insert a plastic hose (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 a plastic hose is used.)
CAUTION
• When using a plastic hose, make sure to insert it only
after pipe expanding is carried out to avoid cutting
dust from getting inside.
2.2 Installation
Refrigerating
Connecting the refrigerating pipe other than at the back
pipe
of the indoor unit
Insert the pipes through the wall hole.
Hang the upper part of the i ndoor unit on the mounting
board.
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.
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.
Mounting board
Refrigerating pipe
Protection pipe
Connecting cord
Drain hose
Hook
Mounting board
Projection of the indoor unit
CAUTION
Be sure that the drain hose is loosely connected
Condensed bend or proper condition like left figure.
water pond
CAUTION
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 unit
during installation. (Careless may result in water
leakage.)
Please remove side cover
Please face this side (suction side) when connecting the piping
of the unit to the wall.
and connecting cord.
Pull
downward
In snowy region, install a snow guard and elevated stand
to ensure the airflow for better heating efficiency.
In other regions, it is recommended to install a tent for
shade.
Tent
500
792
Elevated stand