Hitachi RAS-25CNH2 Installation Manual page 2

Mount the outdoor unit on stable ground to prevent vibration and
G
increase of noise level.
G Decide the location for piping after sorting out the different types of
pipe available.
Procedure to remove the
cover of wiring terminals
G Remove the screw (1
piece).
Please face this side (suction side)
Hold the projected
G
of the unit to the wall
part at the lower left
of the cover and push
the cover upwards to
remove it.
To close the cover,
G
Hook
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.
CONDENSED WATER DISPOSAL OF OUTDOOR UNIT
G There are holes on the base of outdoor unit for condensed water to
exhaust.
In order for condensed water to flow to the draining part, installed the
G
unit on the level ground or block so that the unit is 70mm above the
ground, same as figure shown. Join the drain pipe to one hole.
At first 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 firmly.
A
BASE
DRAIN PIPE
9
WARNING G 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
A, B
When power supplies to Indoor Unit
Indoor
Indoor Unit Outdoor Unit
Unit
Line Cord
L
N
A B C D A B C D
2.0
AC 220-240V
A, B
Connecting Cord
Outdoor
Unit
1.6 or 2.0
GRN + YEL
When power supplies to Outdoor Unit
Indoor Unit Outdoor Unit
A B C D A B C D
Indoor
Unit
1.6 or 2.0
Connecting Cord
A, B
GRN + YEL
Main
Switch
Outdoor
Unit
AC 220 - 240V
G The naked part of the wire core should be 10 mm and the insulated part of the wire must be push into the terminal for 3 – 4 mm.
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 wire specified for the use of air-conditioner.
G Please refer to the installation manual for wire connection and the wiring technique should meet the standards of electrical
installation.
G There is a AC voltage drop between the LN terminals if the power is on. Therefore, be sure to remove the plug from its socket.
How to Remove the Front Cover
1
G Open the cover and remove the screw.
G After open the Front Panel and remove the filter, release the axis by
pulling the center portion of front cover in the direction of arrow
G Push vertical air deflector handle to the right or left side.
3
G After raise the front cover from bottom side as
4
cover by pull the right or left sides as .
How to Install the Front Cover
5
Insert the two hooks at the upper side certainly.
G
G Open Front Panel, push the center down in the direction of the arrow
to insert the axis at the center of the front cover into the hook at the
outlet frame.
1
G Fixed the screw and cover .
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.
G Please tie the pipe and power line together with vinyl tape as
shown in the figure showing the installation of indoor and
outdoor units. Then fix their position with holders.
G To enchance the heat insulation and to prevent water
condensation, please cover the outdoor part of the drain hose
and pipe with insulation pipe.
G Completely seal any gap with putty.
Insulation material for pipe connection
Sleeve of
protection pipe
Putty
< >
I141: C
1 Preparation of Pipe
G Use a pipe cutter to cut the copper pipe.
G Jagged edge will cause leakage.
G 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.
G
Please remove
the cover for
wire connection.
Outer
Diameter (ø)
6.35 (1/4")
9.52 (3/8")
2 Pipe Connection
G Please be careful when bending the copper pipe.
G Applied frozen grease to the connection points and then screw in manually. After
that, use a torque wrench to tighten the connection.
Flare nut
Wrench Torque
wrench
12
C, D
30mm 30mm
10mm 10mm
10mm
GRN + YEL
70mm
Strip Wires
C, D Detail of cutting the
45mm
26mm
10mm connecting cord
10mm
To remove the
connecting wires
30mm C, D
for the indoor unit,
GRN + YEL
10mm
please remove the
low cover panel in
front of the unit.
10mm
50mm
Strip Wires
GRN + YEL C, D
10mm 10mm
45mm 45mm
WARNING
!
Cover
Front Panel
2
1
1
2
.
, release the front 3
Screw
5
5
2
1
Vertical Air Deflector Handle
2 Installation Of Remote Control
G The remote controller can be placed in its holder which is
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 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 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.
Screw (2 pieces)
Holder for
Remote Controller
Remote
Controller
Trimming tool
Copper pipe
! CAUTION
Die
Die
A
Copper pipe
A (mm)
Imperial flaring tool Rigid flaring tool
0.8 – 1.5 0 – 0.5
1.0 – 1.8 0 – 0.5
Outer
Torque N.m
diameter
(kgf cm)
G
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
G For wire connection of the indoor unit, you need to remove the cover under the body
of the unit and front cover.
Method to remove the low cover When power supplied to outdoor unit
1 2
Pull the cover at and in
G G Power cannot be turned off using power
the directions as shown by switch.
arrows to remove the cover. Always keep the switch "OFF" and put
the power switch fixing seal so that the
power cannot be turned off.
G Power cord is not necessary, store
it in the lower-side space on the rear
1
side of indoor unit. When storing, wrap
the power plug with the vinyl bag for
the parts, etc. and seal with adhesive
tape to prevent dust or dirt.
Terminal A and B of indoor unit do not need to be connected.
G
G When power supplied to outdoor unit, power is not turned off
2
by switching the power of indoor unit to "OFF". In that case,
please cut the breaker.
Wiring Of The Outdoor Unit
G Please remove the side cover for wire connection.
You may not be able to close the side cover
G
due to the connecting cord, under such
situation, please press against the wait of
!
side cover to fix it.
WARNING G Be sure that the hooks (2 places) are
plugged in.
Otherwise, water leakage may occur and this
causes short circuit or faults.
Checking for the electric source
Front Cover
4 and the voltage range
G 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 outlet in consideration of the locked
rotor current.
IMPORTANT
Wire length
2
1
up to 16m
up to 15m
up to 25m
3 Power Source And Operation Test
Power Source
CAUTION
!
G 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.
G
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.
Operation Test
G Please ensure that the air conditioner is in normal operating
condition during the operation test.
G Explain to your customer the proper operation procedures
as described in the user's manual.
3 Removal Of Air From The Pipe And Gas Leakage Inspection
Procedures of using Vacuum Pump for Air Removal
As shown in figure on the right, remove
the cap of valve head and valve core
1
and then connect them to the vacuum
pump and manifold valve.
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
4 the cap of valve head. The task is then
completed.
Adding Refrigerant
If the length of the copper pipe is over 5m, add 15g/m refrigerant.
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, first remove a nut of
CAUTION
!
small diameter side, or a seal cap of big diameter side will fly out.
11 Seal
After remove the band, place the
connecting cords and fix with screw
A B C D
Connection cord
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 outlet. In
localities where electrical conditions are poor, use of a voltage
regulation is recommended.
Install outlet for the room air conditioner within the reaching
G
range of the line cord.
Wire gauge
1.6mm 2
IMPORTANT
2
2.5mm
Fuse Capacity
16A time delay fuse
4.0mm 2
When the meter reaches –101KPa (–76cmHg)
during pumping, fully tighten the shuttle.
Meter showing pressure
Lo Hi
Manifold valve
Vacuum pump
Charge
hose
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
Brown=C
Brown=D
cords
with screws
connect the
earth cord
White=A White=B
Side cover
Connection cord
is put under here