Hitachi RAS-18G4 Einbauanleitung Seite 2

Please mount the Outdoor unit on stable ground to prevent vibration
G
and increase of noise level.
G Decide the location for piping after sorting out the different types of
pipe available.
G When removing side cover, please pull the handle after undoing the
hook by pulling it downward.
WARNING G THIS APPLIANCE MUST BE EARTHED.
!
Procedures of Wiring
In case that power is supplied from Indoor Unit
Indoor Unit
Line Cord
L
N
AC 220-240V
Indoor
Unit
Outdoor
Unit
GRN + YEL
G The naked part of the wire core should be 10 mm and 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.
G Be sure to use only power cables approved from the authorities in your country. For example in Germany:
2
Cable type: NYM 3x1.5mm , (fuse = 20A time delay)
G Please refer to the installation manual for wire connection to the terminals of the units. The cabling must
meet the standards of electrical installation.
There is a AC voltage of 240V between the L and N terminals. Therefore, before servicing, be sure to
G
remove the plug from the AC outlet or switch off the main switch.
1 Insulation And Maintenance Of Pipe Connection
G The connected terminals should be completely sealed with
heat insulator and then tied up with rubber strap.
Please tie the pipe and power line together with vinyl tape as
G
shown in the figure showing the installation of Indoor and
Outdoor units. Then fix their position with holders.
To enchance the heat insulation and to prevent water
G
condensation, please cover the outdoor part of the drain hose
and pipe with insulation pipe.
Completely seal any gap with putty.
G
Insulation material for pipe connection
Sleeve of
protection pipe
Putty
3 Power Source And Operation Test
Power Source
! CAUTION
Please use a new socket. Accident may occur due to the use of old
G
socket because of poor contact.
G Please plug in and then remove the plug for 2 – 3 times. This is to
ensure that the plug is completely plugged into the socket.
G Keep additional length for the power cord and do not render the
plug under external force as this may cause poor contact.
G Do not fix the power cord with U-shape nail.
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1
G Use a pipe cutter to cut the copper pipe.
Please face this side (suction
side) of the unit to the wall.
Please remove side cover
when connecting the piping
and connecting cord.
G Jagged edge will cause leakage.
G Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
Pull downward
G Before flaring, please put on the flare nut.
2
! CAUTION
G Please be careful when bending the copper pipe.
G Screw in manually while adjusting the center. After that, use of torque wrench to
tighten the connection.
Wrench
Outdoor Unit
A B A B
2.0
Connecting Cord
Power line
30mm
10mm
10mm
GRN + YEL
70mm
Strip wires
25mm
10mm
10mm
35mm
WARNING
!
2 Installation Of Remote Controller
The remote controller can be placed in its holder which is
G
fixed on wall or beam.
G 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.
Putty Push in the remote
controller in the
direction as shown
in figure below.
Operation Test
Please ensure that the air conditioner is in normal
G
operating condition during the operation test.
Explain to your customer the proper operation
G
procedures as described in the user's manual.
manuals search engine
Preparation of Pipe
Trimming tool
Copper pipe
! CAUTION
Die
Die
A
Recommend to use
G
R410A flaring tool.
Copper pipe
Outer A (mm)
Diameter (mm)
Imperial flaring tool Rigid flaring tool
6.35 ~ 1.0mm
0.0 0.5mm
9.52 0.0 ~ 0.5mm 1.0mm
12.7 0.0 ~ 0.5mm 1.0mm
Pipe Connection
In case of removing flare nut of an Indoor unit, first remove a nut
of small diameter side, or a seal cap of big diameter side will fly
out. Prevent water from entering into the piping when working.
Outer Torque N·m
dia.of pipe (kgf · cm)
Small dia. side
6.35 (1/4") 13.7 – 18.6 (140 – 190)
Flare nut
Large dia. side 9.52 (3/8") 34.3 – 44.1 (350 – 450)
12.7 (1/2") 44.1 – 53.9 (450 – 550)
Small dia. side 19.6 – 24.5 (200 ~ 250)
Valve 6.35 (1/4")
Torque
head cap
19.6 – 24.5 (200 ~ 250)
Large dia. side
9.52 (3/8")
wrench
29.4 – 34.3 (300 – 350)
12.7 (1/2")
Valve core cap
12.3 – 15.7 (125 ~ 160)
Wiring Of The Indoor Unit
G For wire connection of the Indoor unit, you need to remove front panel and electrical cover.
Method to remove front panel
G Refer to "FINAL STAGE OF INSTALLATION – How to Remove The Front Cover".
Method to remove electrical cover
G Remove the screw and electrical cover.
G Insert the connecting cord (A, B) from the bottom of unit.
G Fixed the wire to terminal wires firmly as shown in figure at right side.
Electrical cover
Screw
AUTO
RESTART
SWITCH
Wiring of The Outdoor Unit
G Please remove the side cover for wire connection.
G If you cannot attach the side cover due to the connecting cord, press
the connecting cord in direction to the front panel to fix it.
!
G Be sure that the hooks of the side cover is fixed in certainly. Otherwise
water leakage may occur and this causes short circuit or faults.
WARNING
G 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
G
wiring work must be completed. To make the wiring capacity proper, use
the wire gauges list below for the lead-in from a pole transformer and for
the wiring from a switch board of fuse box to the main switch and outdoor
unit in consideration of the locked rotor current.
IMPORTANT
Cable length Wire cross-section
up to 16m 1.5mm
up to 15m 2.5mm
up to 25m 4.0mm
How to Remove The Front Cover
1 Remove the front panel.
G Please remove and attach the front panel by both hands.
G After opening the front panel by both hands.
1 1 1 1 1
Undo the right arm while pushing it inside.
2 2 2 2 2
Slide the front panel to right as shown in figure. Then
remove while pulling it to front.
2 Remove the filters.
Screw (2 pieces)
3 Remove the caps and screws at the lower portion of the
front cover.
Holder for
Remote Controller
Remote
4 Pull the front cover upward as far as the location where
Controller
the lower portion of the front cover is on the deflector.
5 Remove while pulling the front cover in direction to arrow
as shown in figure to hold the both sides of front cover.
3 Removal 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
1 hose. Remove the cap of valve head.
Connect the vacuum pump adapter to
the vacuum pump and connect the
charge hose to the adapter.
Fully tighten the "Hi" shuttle of the
manifold valve and completely unscrew
the "Lo" shuttle. Run the vacuum pump
2
for about 10–15 minutes, then completely
tighten the "Lo" shuttle and switch off
the vacuum pump.
Completely unscrew the spindle of the
service valve (at 2 places) in anti-
3
clockwise direction to allow the flow of
coolant (using Hexagonal Wrench key).
Remove the charge hose and tighten the
cap of valve head. Check the cap's
4
periphery if there is any gas leakage.
The task is then completed.
Gas Leakage Inspection
Please use gas leakage detector to check if leakage
occurs at the connection of Flare nut as shown on
the right.
If gas leakage occurs, further tighten the connection
to stop leakage. (Use the detector provided for
R410A)
Connect the
earth cord
Screw
After remove the
screw and band,
and put the
connecting cords
and fix the band
with screw.
AUTO
RESTART
SWITCH
G Investigate the power supply capacity and other electrical conditions at
the installation 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. In localities
where electrical conditions are poor, use of a voltage regulation is
recommended.
2
IMPORTANT
2
Fuse Capacity
2
20A time delay fuse
How to Attach the Front Cover
1 1 1 1 1
After covering the front cover to the unit, certainly hook at
the upper portion (three places). Then, check that the drain
pan is certainly attached. Push the center of front cover in
2
1
the direction of arrow.
2 2 2 2 2
Fix the front cover at lower portion by screws and attach
the caps.
3 3 3 3 3
Attach the front panel.
Cap
Screw G Certainly insert the left shaft of the front panel to the hole
of the front cover. Next insert the right shaft as same as
4 4 4 4 4 the left.
Attach the filters which are placed the surface written
"FRONT" up.
G After attaching the filters, push the front panel at three
arrow portion as shown in figure and close it.
Deflector
Lower portion of front cover
When the meter reaches - 101KPa
(-76cmHg) during pumping, fully
tighten the shuttle.
Meter showing pressure
Closed
R410A
Lo Hi
Manifold valve
Charge hose
Valve
Vacuum
Valve
pump
Vacuum pump
adapter
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
Hexagonal
Wrench Key
Cap of valve head
Cap of valve head
ON
OFF
A B
A B
Earth terminal
Hole
Shaft
Guide