Procedures Of Wiring; Wiring Of The Outdoor Unit - Hitachi RAS-E10CBT Installation Manual

Please mount the outdoor unit on stable ground to prevent
●
vibration and increase of noise level.
Open the side plate by unscrewing the screws as shown
●
below.
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
! CAUTION
Please make sure to remove all spacers inside the unit.
Open the Top, Back and Side cover of the unit.
●
Pull out the spacers inside.
●
(Spacers are only for transportation purpose).
If not remove, vibration and noise will occur.
Top cover
Back cover
Side cover
! WARNING
● THIS APPLIANCE MUST 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

Connect the electrical wiring between the indoor and outdoor unit as shown in below Fig.
●
Never connect the wiring by mistake.
The connection cord must be fi xed by the band which is located on the electrical box.
●
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
●
2
in Germany: Cable type: NYM 3x1.5mm , (fuse = 20A time delay)
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 220V 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 completed 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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IA843: A
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
Diameter (ø)
6.35 (1/4")
9.52 (3/8")
2 Pipe Connection
Please be careful when bending the copper pipe.
●
Applied frozen grease to the connection points and then screw in manually. After
●
that, use a torque wrench to tighten the connection.
Detail of cutting the connecting cord
To remove the connecting wires
for the indoor unit, please remove
the low cover panel in front of
the unit.
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 orescent 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 should be insert from top into bottom side of the
holder 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.
CAUTION
!
A (mm)
Imperial fl aring tool Rigid fl aring tool
0.8 ~ 1.5
0 ~ 0.5
1.0 ~ 1.8
0 ~ 0.5
Outer
Torque N.m
diameter
(kgf cm)
●
of pipe
Small diameter
6.35 (1/4") 13.7 ~ 18.6 (140 ~ 190)
side
Big diameter
9.52 (3/8") 34.3 ~ 44.1 (350 ~ 450)
side
Valve head cap 19.6 ~ 24.5 (200 ~ 250)
Valve core cap
12.3 ~ 15.7 (125 ~ 160)
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 "How to Remove The Front Cover".
●
Method to remove the low cover
Pull the cover at 1 and 2 in the directions as shown by arrows to
●
remove the cover.

Wiring Of The Outdoor Unit

Please remove the side cover for wire connection.
●
You may not be able to close the side cover due to the
●
connecting cord, under such situation, please press against
!
the wall of side cover to fi x it.
WARNING
Be sure that the hooks (2 places) are plugged in.
●
Otherwise, water penetration may occur and this causes
short circuit or faults.
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 proper wiring capacity, 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 outlet in consideration of the locked rotor current.
IMPORTANT
Wire length Wire gauge
up to 16m 1.6mm (B.S. 14)
up to 10m 2.0mm (B.S. 12)
Note:
up to 15m 2.6mm (B.S. 10)
Outdoor supply cords shall not be
●
up to 25m 3.2mm (B.S. 18)
lighter than polychloroprene sheathed
up to 42m 14mm 2 (B.S. 16)
fl exible cord, 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.
●
➀
Undo the right arm while pushing it inside.
➁
Slide the front panel to right as shown in fi gure.
Then remove while pulling it to front.
2 Remove the fi lters.
3 After removing two screws, pull the center of
the front cover towards you and release the
claws.
4 Pull the side faces (lower sections) of the front
cover towards you as shown in the fi gure and
remove the cover.
3
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
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.
In case of removing Flare nut of a cooling unit, fi rst remove a nut of
CAUTION
!
small diameter side, or else seal cap of big diameter side will fl y out.
After remove the
screw and band,
put the connecting
cords and fi x the
band with screw.
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 outlet.
In localities where electrical conditions are poor, use of a
voltage regulation is recommended.
CAUTION
!
IMPORTANT
Fuse Capacity
10A time delay fuse
How to Attach the Front Cover
1 Check that the drain pan is securely attached.
2 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.
3 Tighten the two screws.
4 Install the fi lter.
5 Slide the shafts of the right and left arms on the
washable 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.
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.
Connect the
earth cord
A B
A B
Earth terminal