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Wiring Of The Indoor Unit; Procedures Of Wiring - Hitachi RAS-S10CYT Installation Manual

Hitachi split-unit air conditioner
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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.
Please face this side (suction side)
of the unit to the wall
Please remove
the cover for
wire connection.
Procedure to remove the cover of
wiring terminals
Remove the screw (1
piece).
Hold the projected part at
the lower left of the cover
and push the cover
upwards to remove it.
Hook
To close the cover, insert
the upper part of the
cover into the body of
outdoor unit, then be sure
that the hook below the
cover is plugged in before
screwing.
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 specified capacity.

Procedures of Wiring

Line Cord
Indoor Unit
Brown (L)
Blue (N)
Green & Yellow
A
B
2.0
AC 220V
Connecting Cord
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.
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.
Be sure to use only power cables approved from the authorities in your country. For example in Germany: Cable type: NYM
3x1.5mm
2
, (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 plastic tape
as shown in the figure of installation of both the indoor and
outdoor units. Then fix 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.
Insulation material for pipe connection
Sleeve of
protection pipe
Putty
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.
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.
<
>
IA545: A
1
Preparation of Pipe
Use a pipe cutter to cut the copper pipe.
Copper pipe
CAUTION
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 hexagon screw cap.
Outer
Diameter (ø)
Imperial flaring tool
6.35 (1/4")
0.8 – 1.5
9.52 (3/8")
1.0 – 1.8
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.
Hexagon
Small diameter side
screw nut
Big diameter side
Torque
Spanner
Valve head cap
wrench
Valve core cap
30mm
A, B,
10mm
Indoor
Outdoor Unit
Unit
10mm
GRN + YEL
A
B
70mm
Strip Wires
45mm
A, B,
35mm
10mm
Outdoor
Unit
GRN + YEL
CAUTION
Note:
Outdoor supply cords shall not be
lighter than polychloroprene sheathed
flexible cord, 60245 IEC 57.
WARNING
2
Installation Of Remote Control
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 florescent 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 figure below.
Remote
Controller
Screw (2 pieces)
Holder for
Remote Controller
2 Remove the filters.
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 figure and remove the cover.
3
Trimming tool
A (mm)
Rigid flaring tool
0 – 0.5
0 – 0.5
Outer
Torque N.m
diameter
(kgf
cm)
of pipe
Please use gas leakage detector to check if leakage occurs at
the connection of hexagon screw nut as shown on the right.
13.7 – 18.6 (140 – 190)
6.35 (1/4")
If gas leakage occurs, further tighten the connection to stop
9.52 (3/8")
34.3 – 44.1 (350 – 450)
leakage.
19.6 – 24.5 (200 – 250)
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
1
2
Pull the cover at
and
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 wait of side cover to fix it.
WARNING
Be sure that the hooks (2 places) are plugged in.
Otherwise, water leakage may occur and this causes
short circuit or faults.
3
Earth Line And Circuit Breaker
CAUTION
The earth line terminal of the outdoor unit is below the
service valve.
To avoid short circuit, it is necessary to install circuit breaker
depending on the mounting location of the unit.
Do not place earth line near the following objects:
(1) Water pipe
(2) Gas pipe – There is danger of catching fire.
(3) The earth line of lightning conductor and telephone —
short circuit may occur during lightning.
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.
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
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 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.
Cap of valve head
The task is then completed.
Gas Leakage Inspection
in the directions as shown by arrows to
Connect the
earth cord
After remove the
screw and band,
put the connecting
cords and fix the
band with screw.
Connection wire
4
Power Source And Operation Test
Power Source
Do not alter the plug of power cord.
Do not make extension to the power cord.
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 fix the power cord with U-shape nail.
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.
4
Install the filter.
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.
The body of
service valve
Cap of
valve core
Allen key
Cap of valve head
A
B
Blue
Brown
ll
II
A
B
Side cover
Connection wire
is put under here
Screw for earth line
Use 20A time delay FUSE
WARNING
CAUTION
Shaft
Hole
Step

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