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Hitachi RAM-SJ24H3NK Instruction Manual page 2

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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
BUSH
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.
WARNING
THIS APPLIANCE MUST BE EARTHED.
!
Procedures of Wiring
1. Installation procedure and notice
Especially, the selection of installation place
need great care for the split type air conditioner,
because it is very diffi cult to move from place to
place after the fi rst installation.
1.1 Wiring
(1) Connect the electrical wiring between the
Indoor and Outdoor unit, as shown in Fig.
1-1. Never connect the wiring by mistake.
In case of wrong connection, the unit
does not operate properly and it may
cause malfunction.
1.2 Connection of the connecting cords
and power cord
(1) Cut off the connecting cord, the power
cord and strip the insulation of the wire,
as shown in Fig. 1-2.
(2) Connect the connecting cord and power
cord to the terminal board. (Fig. 1-3)
Grounding screw
Connecting
cord 0.8mm
(18AWG)
3.3mm (12AWG)
Grounding
Fig. 1-1
AC 220~240V
1ø 50Hz
!
WARNING
The naked part of the wire core should be 10mm 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 wire specifi ed for the use of air-conditioner.
Please refer to the manual for wire connection and the wiring technique should meet the
standard of the electrical installation.
There is an AC voltage drop between the L and N terminal if the power is on. Therefore,
be sure to remove the plug from its socket.
1
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.
Sleeve of
protection pipe
Insulation material for pipe connection
Putty
<
>
IA2222: 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
Thickness
Diameter
Flare tool for R410A
mm
inch(mm)
Clutch type
0.8
1/4"(6.35)
0.8
3/8"(9.52)
0.8
1/2"(12.70)
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 out. Prevent water from entering
CAUTION
into the piping when working.
BUSH
Small dia. side
DRAIN PIPE
Large dia. side
Flare nut
Valve
head
cap
Valve core cap
Torque
wrench
Wrench
Spindle
Detail of Cutting the Connecting Cord
Fig. 1-2
Grounding screw
Grounding screw
Connecting
Connecting
cord 0.8mm
cord 0.8mm
2
2
2
(18AWG)
(18AWG)
Grounding
Grounding
Grounding
IMPORTANT
Circuit Breaker
2
Power Source And Operation Test
Power Source
!
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.
Putty
3
Trimming tool
Copper pipe
CAUTION
!
Die
Die
Copper pipe
A mm
Conventional fl are tool
Clutch type
Wing nut type
0.0~0.5
1.0~1.5
1.5~2.0
0.0~0.5
1.0~1.5
1.5~2.0
0.0~0.5
1.0~1.5
1.5~2.0
Tightening torque
Outer
dia.of pipe
N·m
1/4"(6.35)
14.0~18.0
3/8"(9.52)
33.0~42.0
1/2"(12.70)
50.0~62.0
Small dia. side
19.6~24.5
1/4"(6.35)
3/8"(9.52)
19.6~24.5
Large dia. side
1/2"(12.7)
29.4~34.3
12.3~15.7
1/4"(6.35)
3.92~5.88
Small dia. side
3/8"(9.52)
1/2"(12.7)
Large dia. side
9.80~10.78
5/8"(15.87)
Wiring of The Outdoor Unit
Please remove the side cover for wire connection.
If you cannot close the side cover due to the connecting cord, please tidy up the wiring for
spacing at front panel.
!
Be sure that the hooks of the side cover is properly fi xed to avoid water penetration. Otherwise
water leakage may occur and this causes short circuit or faults.
WARNING
The connectiong cord should not to service valve and pipe to avoid possibilities of burn. (It
become high temperature in heating operation.)
The appliance incorporates an earth connection for functional purpose only.
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 gauge list below for the wiring from house distribution fuse box to the
outdoor unit in consideration of the locked rotor current.
Investigate the power supply capacity and other electrical conditions at the installing 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 unit . In localities where electrical conditions are poor,
use of a voltage regulation is recommended.
Install outdoor for the room air conditioner within the reaching range of the line cord.
IMPORTANT
For (Power cord - L, N, Earth)
Cable type
Wire cross-section
3 Core
12AWG (3.3mm
2
For (Connecting cord - 1, 2, 3, Earth)
Cable type
Wire cross-section
4 Core
18AWG (0.8mm
2
Bind
connecting
cords to
make them
fi t between
the convex
sections.
Earth line
Length
Type of grounding rod
SP-EB-2
900mm
Be sure to install a ground fault circuit interrupter. (One that can handle higher harmonics.)
!
(This unit uses an inverter. Therefore, a ground fault circuit interrupter capable of handling higher
WARNING
harmonics must be used in order to prevent the ground fault circuit interrupter malfunctioning).
25A
Operation Test
Please ensure that the air conditioner is in normal operating
CAUTION
condition during the operation test.
Explain to your customer the proper operation procedures as
described in the user's manual.
If the indoor unit does not operate, check to see that the
connections are correct.
Trial run should be conducted on one unit at a time to check
for incorrect wiring of connecting cord.
Removal Of Air From The Pipe And Gas Leakage Inspection
When the meter reaches - 101KPa
Procedures of using Vacuum Pump
(-76cmHg) during pumping, fully tighten
for Air Removal
the Manifold Valve.
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
Charge hose
vacuum pump adapter to the vacuum pump
Valve
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.
When pumping starts, slightly loosen
the fl are nut to check of air sucked in.
Then tighten the fl are nut.
Remove the charge hose and tighten the cap
of valve core. Check the cap's periphery if
3
there is any gas leakage.
Completely unscrew the spindle of the
service valve in anti-clockwise direction to
4
allow the fl ow of refrigerant (using Hexagonal
Wrench key).
Re-cap the service valve and tighten using
Cap of valve head
5
wrench. Check the cap's periphery if there is
any gas leakage. The task is then completed.
!
CAUTION
Gas Leakage Inspection
Prevent
moisture
from
entering
pipe
Please use gas leakage detector
connection.
to check if leakage occurs at the
Refrigerating machine oil not be applied to
connection of Flare nut as shown
the outside of the fl are.
on the right.
When refrigerating machine oil is applied to
the outside of the fl are, excessive tightening
If gas leakage occurs, further
of the fl are nut, cracking of the fl are nut,
tighten the connection to stop
destruction of the fl are and gas leakage may
leakage. (Be sure to use R410A
occur.
detector)
When using the control valve, do not use
deteriorated packing. And, do not overtighten
the steering wheel.
Gas leakage from the service valve part,
stagnation, touching fi re, rarely cause ignition.
WARNING
!
Connect the Connecting Cord to "Indoor 1 (1, 2, 3) for indoor unit 1,
"Indoor 2 (1, 2, 3) for indoor unit 2, "Indoor 3 (1, 2, 3) for indoor 3.
)
Cable length
Arrange power cord so they do
not touch service valve.
up to 25m
)
Fig. 1-3
CAUTION
!
Note:
The supply cord of appliances for outdoor use shall
be between 1.5m & 3m long and shall be either an
EXTRA HARD USAGE or a HARD USAGE CORD.
!
CAUTION
Meter showing pressure
Closed
R410A
Manifold valve
Vacuum
Valve
pump
Vacuum
pump
adapter
The body of
service valve
Cap of valve
core
Hexagonal
Wrench Key
Cap of valve head
CAUTION
!

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