Hitachi RAK-18PSA 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
INDOOR UNIT / OUTDOOR UNIT
RAK-18PSA/RAC-18WSA
RAK-25PSA/RAC-25WSA
RAK-35PSA/RAC-35WSA
• 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. This sign indicates prohibition.
CAUTION ....... Improper installation may result in serious consequence.
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.
above
100mm
Press it into the
hole in the chassis
on Screw fixing
the mounting
board
Leveler
Mounting
board
Mark
Line Weight Pipe hole
798mm
Dimensions of 450mm
indoor unit
450mm 100mm
175mm
80mm 600mm 80mm
Drain hose
350mm
638mm
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
Remote controller insulation pipe.
5
3
Anti-mold wasabi
cassette
Heat insulating materials
Above 200mm
Above 50 mm when installed
on the ceiling of balcony
Above 50mm
Bush
give clearance as
widely as possible
Above 200mm
Drain pipe
Above 100mm
Above 200mm
Items 8 & 9 are included in the
Heating efficiency will be
package of the outdoor unit. 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.
Length of Power Cable
About 0.9m About 1.6m
Do not modify the power cable.
1.2 Wall Penetration and Installation of Protection Pipe
Drill a ø65mm hole on wall
Indoor Outdoor
which is slightly tilted towards • 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
the hollow part of the wall to prevent damaged by mouse,
according to the wall thickness
and pass through the wall possibility of short circuit or fire.
hole.
BUSH • Completely seal with putty
Press it into the Empty gap in the sleeve of
High humidity air inside the wall or the outdoor may go in to
hole in the chassis Protection
Sleeve of
protection pipe should be pipe the room and could result in dripping of dew. It could also
DRAIN PIPE
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
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.
Board
anchor
1
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
36mm
2
41mm
Above 50mm
Place the
Drain
ending point of hose
refrigerating pipe Auxiliary insulation
sheet
bending within
this range.
2.3m or more
Temporarily join the refrigerating pipe, drain hose and
Above 80mm
When installing the indoor unit connecting cord together with tape.
above the curtain rail or curtain
box, allow dimensions not
affecting the airflow.
The refrigerating machine oil is easily affected Temporarily join the refrigerating pipe,
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
deteriorate if it is not wrapped with tape.
Pipe
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
hose hole range
product). 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
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.)
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 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
Push the drain hose deeply Connecting cord
Drain
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.
Drain hose
Layout of horizontally piping from the right
Temporarily 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 finishing.
(2) When forming, bend the refrigerating pipe with the
smallest radius.
ø65 wall
hole range Transform after ø65 wall hole
range
bending downward
Place the
refrigerating
Pipe support
pipe bending
within the wall
hole range
Installation after connection of refrigerating pipes
(Horizontal piping)
Refrigerating
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
ø65 wall
Refrigerating pipe
Refrigerating
hole range 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
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
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
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
• 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.
• 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
diameter Large 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 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
Center line of • When using a plastic hose, make sure to insert it only
wall hole
after pipe expanding 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
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
Wrap with tape
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.
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 flow of condensed water of the indoor unit
water pond
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
CAUTION
Elevated stand