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Hitachi RAS-50YHA3 Installation Manual page 2

Split-unit air conditioner indoor unit outdoor unit
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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.
Please face this side (suction
side) of the unit to the wall.
Please remove side cover
when connecting the piping
and connecting cord.
Pull downward
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
There are holes on the base of Outdoor unit for condensed
water to exhaust.
In order to fl ow 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
fi gure. Join the drain pipe to one hole.
At fi rst insert one portion of the hook to the base (Portion A), then pull the
drain pipe in the direction shown by the arrow while inserting the hook
into the base. After installation, check whether the drain pipe cling to the
base fi rmly.
A
BASE
DRAIN PIPE
When Using and Installing In Cold Areas
When the air conditioner is used in low temperature and in snowy
conditions, water from the heat exchanger may freeze on the base surface
to cause poor drainage. When using the air conditioner in such areas, do
not install the bushings. Keep a minimum of 250mm between the drain
hole and the ground. When using the drain pipe, consult your sales agent.
For more details, refer to the installation Manual for Cold Areas.
THIS APPLIANCE MUST
WARNING
!
BE EARTHED.
Power supply shall be connected at the rated voltage, otherwise
the unit will be broken or could not reach the specifi ed capacity.
Procedures of Wiring
Power is supplied from Outdoor Unit
Indoor Unit
GRN + YEL
Strip wires
Outdoor Unit
Strip wires
GRN + YEL
Power line
Control line
WARNING
!
The naked part of the wire core should be 10 mm and 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 power cables approved from the authorities
in your country. For example in Germany: Cable type: NYM
2
3x1.5mm
.
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 remove the plug from
the AC outlet or switch off the main switch.
1
Insulation And Maintenance Of Pipe Connection
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 shown in the fi gure showing the installation of Indoor and
Outdoor units. Then fi x their position with holders.
To enchance the heat insulation and to prevent water
condensation, please cover the outdoor part of the drain hose
and pipe with insulation pipe.
Completely seal any gap with putty.
3
Power Source And Operation Test
Power Source
CAUTION
!
Please use a new socket. Accident may occur due to the use of
old socket because of poor contact.
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.
Keep additional length for the power cord and do not render the
plug under external force as this may cause poor contact.
Do not fi x the power cord with U-shape nail.
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>
IA819: B
1
Preparation of Pipe
Use a pipe cutter to cut the copper pipe.
Jagged edge will cause leakage.
Point the side to be trimmed downwards during trimming to prevent copper
chips from entering the pipe.
Before fl aring, please put on the fl are nut.
Outer
Thickness
Flare tool for R410A
Diameter
(mm)
mm (inch)
6.35 (1/4")
0.8
9.52 (3/8")
0.8
0.8
12.70 (1/2")
15.88 (5/8")
1.0
2
Pipe Connection
In case of removing fl are nut of an Indoor unit, fi rst remove a nut
of small diameter side, or a seal cap of big diameter side will fl y
CAUTION
!
out. Prevent water from entering into the piping when working.
Small dia. side
Large dia. side
Valve
head cap
Valve core cap
Wiring Of The Indoor Unit
For wire connection of the Indoor unit, you need to remove
front panel and electrical cover.
Method to remove front panel
Refer to "FINAL STAGE OF INSTALLATION – How to Remove
The Front Cover".
Method to remove electrical cover
Remove the screw
Electrical
and electrical
cover
cover.
Insert the
connecting cord
(C, D) from the
bottom of unit.
Screw
Fixed the wire
to terminal wires
AUTO
RESTART
SWITCH
fi rmly as shown in
fi gure at right side.
Wiring of The Outdoor Unit
Please remove the side cover for wire connection.
If you cannot attach the side cover due to
the connecting cord, press the connecting
cord in direction to the front panel to fi x
it.
Be sure that the hooks of the side cover is
!
fi xed in certainly. Otherwise water leakage
WARNING
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 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
2
up to 15m
2.5mm
2
up to 25m
4.0mm
2
2
Installation Of Remote Controller
The remote controller can be placed in its holder which is
fi xed 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 fi xed. The unit will beep
when signal is received from the remote controller. The signal
transmission is weaken by the fl uorescent 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 fi gure below.
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.
3
CAUTION
!
Recommend to use
R410A fl aring tool.
A (mm)
Conventional fl are tool
Clutch type
Clutch type
Wing nut type
~
1.0 ~ 1.5
0.0
0.5
1.5 ~ 2.0
~
0.0
0.5
1.0 ~ 1.5
1.5 ~ 2.0
~
0.0
0.5
1.5 ~ 2.5
1.0 ~ 1.5
~
0.0
0.5
1.0 ~ 1.5
1.5 ~ 2.5
Outer
Torque N·m
dia.of pipe
(kgf
·
cm)
6.35 (1/4")
14.0 – 18.0 (140 – 180)
9.52 (3/8")
33.0 – 42.0 (330 – 420)
12.70 (1/2")
50.0 – 62.0 (500 – 620)
Please use gas leakage detector to check if leakage occurs
15.88 (5/8")
63.0 – 77.0 (630 – 770)
at the connection of Flare nut as shown on the right.
Small dia. side
6.35 (1/4")
19.6 – 24.5 (200 ~ 250)
Large dia. side
9.52 (3/8")
19.6 – 24.5 (200 ~ 250)
If gas leakage occurs, further tighten the connection to stop
12.7 (1/2")
29.4 – 34.3 (300 – 350)
leakage. (Be sure to use R410A detector)
12.3 – 15.7 (125 ~ 160)
Connect the
earth cord
C
D
After remove the screw
and band, put the
connecting cords and fi x
the band with screw.
Use 16A Time
Delay Fuse
L
N
C
D
Earth terminal
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.
CAUTION
Outdoor supply cords shall not be lighter than
polychloroprene sheathed fl exible cord with code
designation 60245 IEC 57.
How to Remove The Front Cover
1 Remove the front panel.
Please remove and attach the front panel by both hands.
After opening the front panel by both hands.
Undo the right arm while pushing it inside.
Slide the front panel to right as shown in fi gure. Then
remove while pulling it to front.
2 Remove the fi lters.
Cap
3 Remove the caps and
screws at the lower portion
of the front cover.
Screw
4 Pull the front cover upward
as far as the location where
the lower portion of the front
cover is on the defl ector.
Lower portion of front cover
5 Remove while pulling the front
cover in direction to arrow as
shown in fi gure to hold the both
sides of front cover.
Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in right fi gure, remove the cap of
valve core. Then, connect the charge hose.
1
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" knob of the manifold
valve and completely unscrew the "Lo" knob.
2
Run the vacuum pump for about 10~15
minutes, then completely tighten the "Lo" knob
and switch off the vacuum pump.
Remove the charge hose and tighten the cap
3
of valve core. Check the cap's periphery if
there is any gas leakage.
Completely unscrew the spindle of the
service valve (at 2 places) in anti-clockwise
4
direction to allow the fl ow of refrigerant (using
Hexagonal Wrench key).
Re-cap the service valve and tighten using
wrench. Check the cap's periphery if there is
5
any gas leakage. The task is then completed.
Gas Leakage Inspection
How To Connect The Optional Parts
(RAC Adapter, Weekly Timer, Wired Remote Control)
RAC Adaptor cord
Weekly timer cord/
Wired remote
controller cord
WEEKLY TIMER / WIRED REMOTE CONTROLLER
[For all optional part, please refer catalog for part
number]
Connection to the electrical box:
Remove the cover of electrical box.
Connect the connector of Weekly Timer/wired remote
controller to CN1102.
Assemble back the cover of electrical box.
Please refer to the respective user manual of Weekly
Timer/wired remote controller for further details.
Please be careful not to damage lead wires by edge
of plate when connecting the optional parts.
How to Attach the Front Cover
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 the direction of arrow.
Fix the front cover at lower portion by screws and attach
the caps.
Attach the front panel.
Certainly insert the left shaft of the front panel to the hole
of the front cover. Next insert the right shaft as same as
the left.
Attach the fi lters which are placed the surface written
"FRONT" up.
Defl ector
After attaching the fi lters, push the front panel at three
arrow portion as shown in fi gure and close it.
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
fl are nut to check of air sucked in. Then
tighten the fl are nut.
CN1101
CN1102
Hole
Shaft
Guide

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Rac-50yha3