Hitachi RAS-18SX8 Installation Manual page 2

1. Pipe Cutting and Flaring 2. Pipe Connection
• Use a pipe cutter to cut the pipe and remove burr. • Remove the fl are nut from the pipe of the indoor
unit by removing the fl are nut (female side) with a
Trimming tool
spanner while holding down the half union (male
side) with a spanner.
• Do not crush the pipe while bending it.
Copper pipe
• Apply refrigerant oil on the connection part. After
carrying out the center alignment and manual
CAUTION
tightening of the flare nut, tighten the flare nut
securely with a torque wrench (spanner).
• Remove burr
If burr is not removed, it may cause leakage.
• Point the side to be trimmed downwards during
Half union Flare nut
trimming to prevent copper chips from entering the
pipe.
Male side
Wrench
• Before fl aring, please put on the fl are nut.
Torque wrench
Die Die
A
* Tightening torque must be as shown in the table below.
Copper pipe Outer diameter
of pipe (ø)
Please use exclusive tool for refrigerant R410.
6.35 (1/4 " )
Small diameter side
A (mm) Rigid Flaring Tool
Outer Diameter
9.52 (3/8 " )
Large diameter side
(ø) For R410A tool For R22 tool
Valve Small diameter side 6.35 (1/4 " )
6.35 (1/4 " ) head
0~0.5 1.0
9.52 (3/8 " )
cap Large diameter side
9.52 (3/8 " )
0~0.5 1.0
Valve core cap
CAUTION
• When removing fl are nut of the indoor unit, fi rst remove the nut of small diameter side.
Otherwise the nut of big diameter side will fl y out.
• Prevent water from entering into the piping when connecting.
• Be sure to tighten the fl are nut to the specifi ed torque with a torque wrench.
If the fl are nut is overtightened, it may split after sometime and may cause refrigerant leak.
• When using a control valve, make sure that the packing is not deteriorated and avoid excessive tightening
of the handle. Otherwise, gas may leak from the service valve.
3. Remove of Air from the Pipe and Gas Leakage Inspection
• Remove the valve head cap
From the viewpoint of global environment protection,
air purge type should be vacuum pump method. of the service valve.
• Remove the cap of valve
core and connect the charge
• Fully tighten the "Hi" shuttle of the manifold valve and
1
hose.
completely unscrew the "Lo" shuttle. Run the vacuum
• Connect the vacuum pump
pump. (Adapter is switched on)
adapter to the vacuum pump
2
• After pumping for about 10-15 minutes, completely
and connect the charge hose
tighten the "Lo" shuttle and switch off the vacuum
to the adapter.
pump. (Adapter is switched off)
Meter showing pressure • Loosen the spindle of the service valve with
Make sure the meter small diameter by 1/4 turn and tighten the spindle
3
reaches -0.1MPa
Closed
immediately after 5 to 6 seconds.
(-76cmHg) during pumping.
• Remove the charging hose from the service valve.
R410A Manifold valve
When pumping starts, slightly loosen
the fl are nut to check if air sucked in. Valve
• Unscrew the spindle of both the
Then tighten the fl are nut.
service valves in anticlockwise
Ball valve Vacuum pump
direction to allow the flow of
4
Charge hose refrigerant (unscrew halfway).
• Tighten the cap of valve head.
Vacuum pump adapter Check and make sure that there
is no gas leakage.
Please leave the ball valve fully open
at all times.
Ball valve
— 9 —
Terminal marking
Wiring of the Outdoor Unit
A B C
Please remove the side cover and terminal cover for wiring
connection.
WARNING
• The connecting cord must be fi x with cord band
Otherwise rain water may enter and causes short circuit.
IMPORTANT
Besides, an external force may apply to the connection part
Fuse Capacity
of the connecting cord and could result in heat and fi re.
Cord band
• The terminal cover must be installed after work is done. 16A time delay fuse
1. Heat Insulation and Finishing of Piping
• Cover the pipe connection with the auxiliary insulation sheet,
Insulate
Seal with putty
and wrap
wrap the tape without any gap.
Connecting cord
with tape
• If there is gap or over-tightened, it may cause
Refrigerating
condensation.
pipe
• Please wrap the pipe and power cord together with vinyl Drain hose
tape as shown in the fi gure of the installation of indoor and Do not cut the drain
Bush for pipe
hose in the middle
outdoor units on page 2.
• To enhance the heat insulation and to prevent water
When using an exit
condensation, please cover the outdoor part of the drain
cover, do not attach a
hose and pipe with insulation sheet.
bush for pipe.
• When using an exit cover, do not attach a bush for pipe.
Putty
• When an exit cover is not used, seal the gap of the hole
on the wall, bush and pipe completely with putty. If an exit CAUTION
cover is used, seal the gap of the hole on the wall and pipe
• Completely seal any gap with putty
completely with putty. In the case of embedded piping,
High humidity air inside the wall or the outdoor may
seal the gap of the pipe completely with putty. Incomplete
go in to the room and could result in dripping of dew.
sealing could cause entering of high humidity air into the
It could also cause smell or odor present outdoor and
wall or indoor unit, which could result in dripping of dew. It
inside the wall spreading into the room.
could also cause smell or odor present outdoor and inside
the wall spreading into the room.
2. Affi xing the Remote Controller and Installing the Anti-mold Wasabi Cassette
• The remote controller may be affi xed to a wall or pillar with the remote controller mounting screw.
• When operating the air conditioning with the remote controller attached, please make sure that the signal is received by
the air conditioning. Furthermore, fl uorescent lighting may affect the reception of the signal, therefore, please make sure
by turning on the fl uorescent lighting even during the day.
• Lighting fi xtures with electronic starters may shorten the reception distance and may even interfere with the signal being
received.
• Install the 7 anti-mold wasabi cassette.
Installation
(Refer to page 8 of the Operation Manual)
Noise may occur if the anti-mold wasabi
cassette is not installed properly.
5 Screw for remote
Prohibited
Wall or controller holder
pillar
3 Remote controller holder
• Insert from above. • Hold the upper part of • Do not remove the remote
the remote controller controller by twisting it left
to pull it out. and right. Doing so could
result in coming off of the
7 Anti-mold wasabi
rear cover.
cassette
— 11 —
< S842 : A >
Works to be done when transferring or removing air
Gas Leakage Inspection
conditioner
Please use gas leakage detector
to check if leakage occurs at From the viewpoint of global environment protection,
connection of Flare nut as refrigerant should be recovered (pumped down) when the
air conditioner is transferred or removed.
shown on the right.
1 Perform force-cooling operation (refer to "Force-cooling
If gas leakage occurs, further
operation" on page 12) for about 5 minutes as a preliminary
tighten the connection to stop
operation.
leakage. (Be sure to use R410A
2 Tighten the spindle of the service valve at small diameter
detector.)
side in clockwise direction.
3 Continue the force-cooling operation for another 1-2
minutes, and then tighten the spindle of the service valve
at large diameter side in clockwise direction.
4 Stop the force-cooling operation.
Female side
Procedures of Wiring Detail of Cutting the Connecting Cord
• Indoor unit
Indoor unit Outdoor unit 70mm
Torque N•m
10mm
(kgf•cm)
AC 220-230
Strip
1ø 50Hz
13.7~18.6 (140~190)
wires
34.3~44.1 (350~450) A B C A B C
Connecting
• Outdoor unit
cord
19.6~24.5 (200~250)
160mm
19.6~24.5 (200~250) 10mm
12.3~15.7 (125~160)
ø2.0
WARNING
• The naked part of the wire core should be 10mm fi x it to the terminal tightly. Then try to pull the individual wire to check
if the contact is tight. Improper insertion may burn the terminal.
• Be sure to use only wire specifi ed for the use of air-conditioner.
• Please refer to the manual for wire connection, the wiring technique should meet the standard of the electrical
installation.
• Leave some space in the connecting cord for maintenance purpose and be sure to secure it with the cord
band.
• Secure the connecting cord along the coated part of the wire using the cord band. Do not exert pressure
Valve head cap
for the service on the wire as this may cause overheating or fi re.
valve at small
diameter side
Wiring of the Indoor Unit
Valve head
cap for the
service valve
1 Remove the front panel. (Refer to "Removing and 4 Bring the connecting
at large
Attaching the Front Panel" on page 13) cord from the rear
diameter side
surface to the front
2 Remove the terminal cover and screw, hold the upper
Cap of valve core
surface through the
part when removing.
cable guide.
Screw
Terminal cover
Body of service valve
5 Connect the connecting
Cap of
valve core cord and fi x with cord
band.
Hexagonal
wrench key
6 Hook onto the claw at
Cap of valve 3 Remove the lower cover. the lower part of the
head
terminal cover and fi x
Cap of valve with screw.
head
— 10 —
About Address Selector Switch
Terminal cover
This is utilized to avoid the interference of remote controller signals when two indoor units
are installed in the same room. The Address Selector Switch is on the outside of the remote
Earth terminal controller battery cover. (Factory setting is set to "A")
• Setting the address (to avoid interference)
Only one of the two indoor units has to be set (turn off the power to the other indoor unit).
1 Place a battery in the remote controller and press the reset switch. (Refer to page 11 of
the Operation Manual)
2 While pointing the remote controller transmitter/receiver at the indoor unit, move the
switch of the Address Selector Switch to "B".
3 The channel is set when the unit beeps, confi rming it has received the signal.
• After changing the address, please confi rm the unit's operation with the remote controller.
If the unit does not operate, return the switch to "A" and set the switch again.
3. Remove the Protection Sheet
Auxiliary
insulation sheet
• Remove the protection sheet on the display panel.
About 90mm
Putty
4. Power Source and Operation Test
Power source Force-cooling operation
• When the temporary switch of the indoor unit is pressed for
WARNING
more than 5 seconds, the force-cooling operation starts.
Use this mode when performing the failure diagnosis or
• Never modify or extend the power cord.
collecting refrigerant into the outdoor unit.
• Keep additional length for the power cord and do not
• The Timer lamp fl ashes when force-cooling is in operation.
render the plug under external force as this may cause
• Press the temporary switch again or use the remote controller
poor contact.
to stop the force-cooling operation once this operation is
• Do not fi x the power cord with U-shape nail.
completed.
• The power cable easily generates heat. Do not bring
the cable together with a wire or vinyl tie.
CAUTION
• Use a new power outlet.
Old power outlet may cause insuffi cient electrical contact,
Temporary switch
which could result in unforeseen accident.
(Force-cooling operation starts when the
• Connect and disconnect the power plug a few times
switch is pressed for more than 5 seconds.
Press the switch again and use the remote
to ensure smooth plug-in before completely insert the
controller to stop the operation.)
power plug into the power outlet.
Operation test
• Do not operate the unit for more than 5 minutes while
• Please ensure that the air conditioner is in normal operating
the spindle of the service valve is closed.
condition during the operation test.
• Explain to your customer about the proper operation procedures
as described in the operation manual.
• If the indoor unit won't operate, check the cable for correct
connection.
— 12 —
Removing and Attaching the Front Panel
• Be sure to hold the front panel with both hands to detach and attach it.
Please refer to the operation manual on how to open and close the front panel.
• Please do not use excessive force to open and close the movable panel
by hands.
This may cause malfunction.
(The movable panel automatically open and close when the power is ON/OFF
and START/STOP.)
Removing
2
70mm Green + Yellow
A, B (ground)
10mm
Strip
wires C, (ground)
10mm
Connecting cord Connecting cord
45mm
160mm
Arm
Strip C, (ground)
A, B 10mm
wires
Green +
Yellow
20mm
100mm
1 Push the end of the right-side arm outward to release
the tab.
2 Move the left-side arm outward to release the left tab,
and then pull the panel towards you.
Attaching
Refrigerating
pipe
Arm
Cable
guide
Drain hose
Connecting
Step
cord
1 Insert the shaft of the left arm along the step on the unit into the
A
Connecting cord hole.
2 Securely insert the shaft of the right arm along the step on the
B
Cord band
unit into the hole.
3 Make sure that the front panel is securely attached, and then close
C
the front panel.
• Once the installation work has been completed, close the front panel and insert the power plug into the power
outlet, and then carry out "Filter Cleaning Operation Check".
Address
Filter Cleaning Operation Check
Address
After the installation work has been completed, be sure to carry out "Filter Cleaning Operation Check"
Switch before performing trial run (cooling or heating)!
Address selector switch
(1) Before turning on the power of the air conditioner, make sure that the fi lters (2 pieces at the top and 2 pieces in
front) have been installed properly and locked.
(2) When the power of the air conditioner turns on, the "Filter Cleaning Operation" starts automatically.
The clean indicator is lit during the fi lter cleaning operation.
Unlike the coventional type of air conditioner, this air conditioner has no
grille at its top surface, It is because this air conditioner is equipped with the
Do not touch the cleaning unit during cleaning unit, and to prevent the top surface from getting dirty easily.
the fi lter cleaning operation.
Doing so could result in injury or
failure of the appliance.
Display panel
Front Panel
• Close the front panel properly.
(The fi lter cleaning operation does
Filter Lock
not start if the front panel is not
• Make sure that the top fi lters have closed properly.)
been locked. Lock the fi lters if
• If the front panel is opened during
they are not locked. (The fi lters the operation check, the operation
may come off during the operation
will stop immediately.
if they are not locked.)
• Filter cleaning operation check will take approximately 7 minutes for the cleaning unit to make one cycle of back and forth
movement. Make sure that the cleaning unit is actually working by a visual inspection from the top of the indoor unit.
• Close the front panel properly.
(The fi lter cleaning operation does not start if the front panel is not closed properly.)
• If the front panel is opened during the operation check, the operation will stop immediately.
• If the "ON/OFF" button on the remote control is pressed during the operation check, the operation check is
stopped before its completion. Wait until the operation check is completed without pressing any button on the remote
controller.
• If the fi lters are not installed properly, "Filter Cleaning Operation" is found abnormal and the
blinks.
The fi lters may come off during operation if they are not installed properly.
CAUTION
• If the clean indicator blinks during the "Filter Cleaning Operation" means that the operation is stopped before its
completion due to an abnormal condition.
In this case, refer to "Check the Operation of the Filter Cleaning Unit" and "Troubleshooting" of the operation manual and
take appropriate actions.
Removing the Front Cover
1 Remove the front panel.
2 Remove the screw cover at the bottom of the front cover
and remove the screw.
3 Remove the screws on the terminal cover, on the left side
CAUTION
of the front cover and the screw on the right side.
Movable
panel
Screw
1
Push
Left side of the
Screw Bottom part of
front cover
the front cover
4 Remove the bottom part of the front cover by pulling it
forward.
Arm
5 Hold onto the left side of the front cover and remove while
pulling in the direction of the arrow.
6 Insert the screwdriver into the hole on the upper right of the
front cover to release the tab.
Arm
7 Hold onto the right side of the front cover and remove while
pulling in the direction of the arrow.
Step
— 13 —
How to check Micro Mesh Stainless Filter installation
CAUTION
• Remove the front panel and check if the fi lter locks (4 pcs) are tripped or slant.
• If the fi lters are not inserted properly, refer to following "Installing the Micro Mesh Stainless Filters".
• Please perform "Filter cleaning operation check" again after reinstalled the fi lters.
Installing the Micro Mesh Stainless Filters
• Slide the locks (2 places each on the left and right) of the micro
mesh stainless filters upwards.
• Place the micro mesh stainless filter with its side having
Cleaning Unit
indication of UPPER FILTER and BACK facing towards the
unit. (The shape of the left and right filters are the same.)
• Insert the bottom side of micro mesh stainless filter (left and
right), then slightly bend and insert it in the arrow direction.
Bend and insert
Clean Indicator
This indicator is lit during the fi lter
cleaning operation.
It blinks if any abnormal condition
occurs during the filter cleaning
operation.
• Slide micro mesh stainless filter lock (2 places on the left and
right) downwards.
clean indicator
Engraved mark UPPER FILTER and BACK at the back.
— 15 —
Attaching the Front Cover
1 Make sure that the dew receiving pan and the cleaning unit
are securely attached.
2 After attaching the left and right sides of the front cover onto
the unit, ensure that the top tabs (2 places) have been fi x
on.
Fix on the top tabs (2 places)
Terminal cover
Right side of
Screw
the front cover
3 Tighten the screws on the terminal cover and on the left and
right sides of the front cover.
4 Tighten the screws at the bottom of the front cover and
replace the screw cover.
Screw Screw
5 Attach the front panel.
— 14 —
• Align the fi lter with the top face of the indoor unit, and then
slide and push it in. (The shape of the left and right filters
are the same.)
Lock
• Push up the filter lock (both side) on the top surface.
Insert all
Filter lock
H-LINK
[For all optional part, please refer catalog for part
number]
As for connecting to H-Link, a separately purchased
RAC Adapter is required.
• To install the wiring, the electrical box cover must be
opened.
• Connect the connector of RAC Adapter to CN7.
• Assemble back the cover of electrical box.
• Please refer to the respective user manual of RAC
Adapter for further details.
• Please be careful not to damage lead wires by edge of
plate when connecting the optional parts.
• You can refer to this installation manual on how to remove
and re-attach the front cover.
CN7
CN7
— 16 —