Hitachi RAC-18YH4 Bedienungsanleitung Seite 146

• Please mount the Outdoor unit of 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. Reinstall the side cover in the reverse order of the removal.
Please face this side (suction side)
of the unit to the wall.
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
• There is holes on the base of Outdoor unit for condensed water to exhaust.
• In order to flow condensed water to the drain, the unit is installed on a stand or a
block so that the unit is 100mm above the ground as shown figure. Join the drain
pipe to one hole.
• Cover the drain hole with a bush. To install the bush, put it on the drain hole as
shown in the figure and press the both sides of the bush to fit into the hole.
After installation, check whether the drain pipe and bush cling to the base firmly.
DRAIN HOLE
9 BUSH
Push Push
Outer diameter: 16 mm or more
• Install the outdoor unit horizontally and make sure that condensate drains away.
• In case of using in chilly area
Especially, in case that there are many snows by very cold in chilly area, condensed
water freezes on the base and may result not to drain. In this case, please remove
the bush and the drain pipe at the bottom of unit. (Left and center near discharge
portion of air, each 1 place). It becomes smooth drain.
Ensure that the distance from the drain hole to the ground is 250 mm or more.
• THIS APPLIANCE MUST BE
WARNING
EARTHED.
Procedures of Wiring
When power supplies to Indoor Unit
Indoor Unit
Line cord
ø2.0
Connecting Cord
ø1.6 or ø2.0
When power supplies to Outdoor Unit
Indoor Unit Outdoor Unit
ø1.6 or
ø2.0
Connecting Cord
• The naked part of the wire core should be 10mm fix 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 specified for the use of air-conditioner.
• Please refer to the manual for wire connection and the wiring technique should
meet the standard of the electrical installation.
• There is an AC voltage drop between the LN terminal if the power is on. Therefore,
be sure to remove the plug from its socket.
• 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 on the wire as this
may cause overheating or fire.
1 Power Source And Operation Test
Power Source
WARNING
• Never remodel the power plug nor extend the long-distance
cord.
• Keep additional length for the power cord and do not render
the plug under external force as this may cause poor contact.
• Do not fix the power cord with U-shape nail.
• The power cable easily generates heat. Do not bring the
cable together with a wire or vinyl tie.
Operation test
• Please ensure that the air conditioner is in normal operating
condition during the operation test.
• Explain to your customer the proper operation procedures as
described in the user' s manual.
• If the indoor unit won't operate, check the cable for correct
connection.
• Turn on the lamp in the room where the indoor unit is installed
and check the remote controller for normal operation.
After completing the service switch
operation, be sure to keep the
switch pressed for one or more
seconds and stop the force-cooling
operation.
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Please remove side cover
when connecting the piping
and connecting cord.
Pull downward
CAUTION
• Do not touch the suction
por t, bottom surface, or
aluminum fin of the outdoor
unit.
Failure to do so may cause
an injury.
BASE
above
100mm
9 BUSH
DRAIN HOLE
0 DRAIN PIPE
Wrench
Wiring of The Indoor Unit
• For wire connection of the Indoor unit, you need to remove the front cover, the low cover
under the body of the unit and terminal cover.
• Power cannot be turned off using power switch.
Detail of cutting the connecting cord
Indoor Unit
Outdoor Unit 30mm 30mm
Green + Yellow
10mm 10mm • Power cord is not necessary, store it in the lower-side space on the rear
10mm
Strip wires
70mm
• Terminal A and B of indoor unit do not need to be connected.
Outdoor Unit
• When power supplied to outdoor unit, power is not turned off by switching
30mm 30mm
10mm 10mm
Strip wires
Green + Yellow
• Remove the cover from the terminal base and screw the cable.
Connecting cord
Detail of cutting the connecting cord
Connecting cord
Indoor Unit
30mm
Green + Yellow
10mm
70mm
10mm
Outdoor Unit
50mm 50mm
10mm 10mm
Green + Yellow Green + Yellow
Strip wires
WARNING
• Wiring for the horizontal piping from the right side
Cable
WARNING
Power
cord
2 Installation of Remote Controller
• The remote controller can be placed in its holder which is fixed
on wall or beam.
• To operate the remote controller at its holder, please ensure that
the unit can receive signal transmitted from the controller at the
place where the holder is to be fixed. The unit will beep when
signal is received from the remote controller. The signal
transmission is weaken by the fluorescent light. Therefore, during
the installation of the remote control holder, please switch on
the light, even during day time, to determine the mounting location
of the holder.
The controller must be hooked onto the hook at the lower part
of the holder. Push in the remote controller in the direction as
shown in figure below.
Remote controller
Force-cooling operation
• When the service switch
of the indoor unit is
pressed for 1 or more
seconds, the force-
cooling operation starts.
Use this mode when
performing the failure
diagnosis or collecting
refrigerant into the
outdoor unit.
• Do not operate the unit for more than 5 minutes
CAUTION
while the spindle of the service valve is closed.
manuals search engine
1 Preparation of Pipe
• Use a pipe cutter to cut the copper pipe and remove burr.
Trimming tool
Copper pipe
CAUTION
• Remove burr and jagged edge will cause leakage.
• Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
• Before flaring, please put on the flare nut.
Die
Die
A
Copper pipe
Outer A (mm) Rigid Flaring Tool
Diameter (Ø) For R410A tool For R22 tool
6.35 (1/4") 0 - 0.5 1.0
9.52 (3/8") 0 - 0.5 1.0
2 Pipe Connection
• In case of removing flare nut of a indoor unit, first remove
a nut of small diameter side, or a seal cap of big diameter
side will fly out. Free from water into the piping when
working.
CAUTION
• Be sure to tighten the flare nut to the specified torque with
a torque wrench.
If the flare nut is overtightened, the nut may be split after a
long period has passed, and may cause a refrigerant leak.
• Please be careful when bending the copper pipe.
• Screw in manually while adjusting the center. After that, use a torque wrench to
tighten the connection.
Outer diameter
Flare nut
of pipe (ø)
Small diameter side 6.35 (1/4")
Large diameter side 9.52 (3/8")
Small diameter side 6.35 (1/4")
Valve
head cap
Large diameter side 9.52 (3/8")
Torque
Valve core cap
wrench
When power supplied to outdoor unit
Always keep the switch "off" and put the switch cover
on the power switch so that the power cannot be turned
on.
side of indoor unit. When storing, warp the power plug with the vinyl bag
for the parts, etc. and seal with adhesive tape to prevent dust or dirt.
the power of indoor unit to "off". In that case, please cut the breaker.
Securely screw in the power cord and
D
C connecting cord so that it will not get loose
B
or disconnect.
A
Tightening torque reference value:
1.2 to 1.6 N·m (12 to 16 kgf·cm)
Excessive tightening may damage the
interior of the cord requiring replacement.
When putting two connecting cords
through the band.
Screw
Earth
After remove the screw
and terminal cover, and
Terminal cover
put the connecting cords
Connecting cord
and fix the terminal cover
Screw
with screw.
After wiring the indoor unit, make sure
to reattach the terminal cover.
Not to interfere with the drain hose, fold the cable at the
drain hose side of the electric box as shown in the left
figure, and pass the cable just over the electric box and
pull it out.
Piping and drain hose layout
Pipe
Cable
Drain
Pipe
hose
Electric box
Drain
Form the cable properly so that the
low cover won' t touch the cable in Power cord
installation.
How to remove the front cover
¡
Remove the front panel
• Please remove and attach the front panel by both hands.
• After opening the front panel by both hands.
1
Undo the right arm while pushing it inside.
2
Slide the front panel to right as shown in figure. Then remove
while pulling it to front.
™
Remove the filters.
Screw (2 pieces)
£
After removing two screws, pull the center of the front cover
towards you and release the claws.
Holder for Remote
¢
Controller Pull the side faces (lower sections) of the front cover towards
you as shown in the figure and remove the cover.
Screw
Cover
Service switch (If the switch is
pressed for one or more seconds, the
force-cooling operation starts. If the
• Push up the [PUSH] sections at the bottom of the indoor unit and
switch is pressed for additional one or
pull the bottom plate towards you. Then the claws are released
more seconds, the operation stops.)
from the stationary plate.
(The [PUSH] sections are indicated by 2 arrows in the right figure)
3 Remove of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in right figure, remove the cap
of valve core. Then, connect the charge
hose. Remove the cap of valve head.
1
Connect the vacuum pump adapter to the
vacuum pump and connect the charge
hose to the adapter.
Fully tighter the "Hi" shuttle of the manifold
valve and completely unscrew the "Lo"
shuttle. Run the vacuum pump for about
10-15 minutes, then completely tighten the
"Lo" shuttle and switch off the vacuum
• Please use
2
pump.
exclusive tool for
• Loosen the spindle of the service valve
refrigerant R410.
with small diameter by 1/4 turn and
tighten the spindle immediately after 5
to 6 seconds.
• Remove the charging hose from the
service valve.
Completely unscrew the spindle of the
service valve (at 2 places) in anticlockwise
3
direction to allow the flow of refrigerant
(using Hexagonal Wrench key).
Tighten the cap of valve head. Check the
4
cap's periphery if there is any gas leakage.
The task is then completed.
Gas leakage inspection
Please use gas leakage detector to check if leakage
Torque N·m
occurs at connection of Flare nut as shown on the
(kgf·cm)
right.
13.7 – 18.6 (140 – 190)
34.3 – 44.1 (350 – 450)
If gas leakage occurs, further tighten the connection
19.6 – 24.5 (200 – 250)
to stop leakage.
19.6 – 24.5 (200 – 250)
12.3– 15.7 (125 – 160)
Method to remove the low cover
• Pull at the ¡ and ™ in the directions as shown by
arrows to remove the cover.
Wiring of the Outdoor Unit
• Please remove the side cover for wire connection.
• If you cannot attach the side plate due to the connection cord, please
press the connecting cord in the direction to the front panel to fix it.
• Be sure that the hooks of the side cover fixed in certainly. Otherwise water
WARNING
leakage may occur and this causes short circuit or faults.
• The connecting cord should not touch to service valve and pipes. (it
becomes high temperature in heating operation.)
Checking for the electric source and the voltage range
• Before installation, the power source must be checked and necessary wiring work must
Insulating plate
be completed. To make the wiring capacity proper, use the wire gauge list below for the
Cord band
wiring from house distribution fuse box to the outdoor unit in consideration of the blocked
rotor current.
IMPORTANT
Wire length Wire gauge
WARNING
2
up to 6m 1.6mm
up to 15m 2.5mm 2
up to 20m 4.0mm 2
• Investigate the power supply capacity and other
electrical conditions at the installing location.
Depending on the model of room air conditioner to be
installed, request the customer to make arrangements
for the necessary electrical work etc.
The electrical work includes the wiring work up the
outdoor unit. In localities where electrical conditions
are poor, use of a voltage regulation is recommended.
• Install outdoor for the room air conditioner within the
reaching range of the line cord.
How to Attach the Front Cover
¡
Check that the drain pan is securely attached.
™
After installing the front cover onto the unit, hook three claws
at upper side of the cover securely. Then, push the center of
the front cover to lock the claws.
£
Tighten the two screws.
¢
Install the filter.
∞
Slide the shafts of the right and left arms on the front panel
along the steps to insert the shafts into the holes till they stop.
After checking that the shafts are securely inserted, close the
panel.
HOW TO REMOVE INDOOR UNIT
When the meter reaches - 101KPa
(-76cmHg) during pumping fully
tighten the shuttle.
Meter showing
pressure
Closed
R410A
Charge
Manifold
hose
valve
Vacuum
pump
Valve
Vacuum
pump
adapter
Valve
When pumping starts, slightly
loosen the flare nut to check of
air sucked in. Then tighten the
flare nut.
The body of service
valve
Cap of
valve core
Cap of valve
head
Hexagonal
wrench Key
Cap of valve
head
cover
Earth terminal
IMPORTANT
Fuse Capacity
16A time delay fuse
Shaft
Step
Hole
[Push] mark positions