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IA1994: A
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Preparation of Pipe
1
●
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.
Pipe Connection
2
INST
ALLA
TION OF REFRIGERA
TING PIPES
AND
AIR REMOV
AL
CAUTION
!
Removal Of Air From The Pipe And Gas Leakage Inspection
3
Outer
Diameter (mm)
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
1.0 ~ 1.5
Clutch type
A (mm)
1.5 ~ 2.0
1.5 ~ 2.0
1.5 ~ 2.5
1.5 ~ 2.5
Wing nut type
Thickness
(mm)
0.8
0.8
0.8
1.0
0.0
~
0.5
0.0
~
0.5
0.0
~
0.5
0.0
~
0.5
Flare tool for R32
Clutch type
Conventional
fl
are tool
Outer
diameter
of pipe
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
15.88 (5/8")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
15.88 (5/8")
Valve core cap
Torque N.m
(kgf
●
cm)
13.7 ~ 18.6 (140 ~ 190)
34.3 ~ 44.1 (350 ~ 450)
44.1 ~ 53.9 (450 ~ 550)
49 ~ 58.8 (500 ~ 600)
19.6 ~ 24.5 (200 ~ 250)
19.6 ~ 24.5 (200 ~ 250)
29.4 ~ 34.3 (300 ~ 350)
29.0 ~ 31.0 (296 ~ 316)
12.3 ~ 15.7 (125 ~ 160)
Small dia. side
Large dia. side
Valve
head cap
Small dia. side
Large dia. side
CAUTION
!
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 into the piping when working.
●
Recommend to use
R32
fl
aring tool
AIR REMOV
AL
When the meter reaches - 101KPa (-76cmHg)
during pumping, fully tighten the shuttle.
Lo
Hi
Meter showing pressure
Closed
R32
Manifold valve
Vacuum pump
Valve
Charge hose
Valve
Vacuum
pump
adapter
When pumping starts, slightly loosen the
fl
are nut to check of air sucked in. Then
tighten the
fl
are nut.
Procedures of using Vacuum Pump for Air Removal
OUTDOOR UNIT
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
W
ARNING
●
Use the two spanners of the service valve
fl
are nut and
tighten, loosen so that the service valve will not deform. Gas
leak from the crushed part, stagnation, touching
fi
re, rarely
cause ignition.
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. (Use the detector
provided for R32)
As shown in right
fi
gure, remove the cap of
valve core. Then, connect the charge hose.
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.
Run the vacuum pump for about 10~15
minutes, then completely tighten the “Lo” knob
and switch off the vacuum pump.
After vacuuming, con
fi
rm that the needle of
the manifold gauge is stable for 3~5 minutes.
2
Completely unscrew the spindle of the
service valve (at 2 places) in anti-clockwise
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
any gas leakage. The task is then completed.
Remove the charge hose and tighten the cap
of valve core. Check the cap’s periphery if
there is any gas leakage.
4
5
1
3
●
Prevent moisture from entering pipe connection.
●
Refrigerating machine oil not be applied to the outside
of the
fl
are.
When refrigerating machine oil is applied to the
outside of the
fl
are, excessive tightening of the
fl
are
nut, cracking of the
fl
are nut, destruction of the
fl
are
and gas leakage.
●
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.
CAUTION
!
CONNECTION OF POWER CORD
WARNING
●
If you cannot attach the side plate due to the
connecting cord, please press the connecting
cord in the 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
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
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.
Wire cross-section
2.5 mm
2
Wire length
up to 20m
Wire cross-section
1.5mm
2
For (Power cord - L, N, Earth)
For (Connecting cord - 1, 2, 3, Earth)
●
THIS APPLIANCE MUST BE EARTHED.
Wiring Of The Outdoor Unit
●
Please remove the side cover for wire connection.
!
WARNING
!
WARNING
!
Wiring Of The Indoor Unit
●
For wire connection of the Indoor unit, you need to remove the front
cover, the low cover under the body of the unit and terminal cover.
●
Remove the cover from the terminal base and screw the cable.
●
The naked part of the wire core should be 10 mm
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 speci
fi
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 LN terminal if the power
is on. Therefore, be sure to remove the plug from its socket.
IMPORTANT
16A
Circuit Breaker
Detail of cutting the connecting cord
!
CAUTION
Note:
●
Outdoor supply cords shall not
be lighter than polychloroprene
sheathed
fl
exible cord with code
designation, 60245 IEC 57.
Method to remove electrical cover
●
Remove the screw and electrical cover.
●
Insert the connecting cord (1, 2, 3) from the back of unit.
●
Fixed the wire to terminal wires
fi
rmly as shown as below.
Connecting cord
Electrical cover
Screw
Indoor Unit
Procedures of Wiring
CAUTION
!
●
A circuit breaker must be installed. Without a circuit
breaker or fuse the danger of electric shock exists.
A main switch with a contact gap of more than 3mm
has to be installed in the power supply line to the
outdoor unit.
●
Do not install the unit near a location
where there is flammable gas. The
outdoor unit may catch
fi
re if
fl
ammable
gas leaks around it.
●
Do not install the indoor unit in a machine shop or
kitchen where vapor from oil or its mist
fl
ows to the
indoor unit. The oil will deposit on the heat exchanger,
thereby reducing the indoor unit performance and may
deform and in the worst case, break the plastic parts
of the indoor unit.
●
Observe the rules and regulations of the electrical
installation and the methods described in the installation
manual when dealing with the electrical work. Use power
cables approved by the authorities of your country.
●
Be sure to use the speci
fi
ed wire for connecting the indoor
and outdoor units. Please ensure that the connections
are tight after the conductors of the wire are inserted into
the terminals. Improper insertion and loose contact may
cause over-heating and
fi
re.
WARNING
!
●
Leave some space in the connecting cord
for maintenance purpose and be sure to
secure it with the cord band.
●
Secure the connecting cord along the coated
part of the wire using the cord band. Do not
exert pressure on the wire as this may cause
overheating or
fi
re.
●
Supply cords, current- carrying conductors
become taut before earthing conductor, if
the cord slips out of the cord band.
FINAL
ST
AGE OF INST
ALLA
TION
Pump Down Method When Reuse
Existing Piping (R410A Model) for
R32 Model
Proper Pump Down Method
●
Compressor oil of R410A model is insoluble in
compressor oil of R32 model. The mixing of compressor
oil may cause damage of compressor.
Possibility of Mixing
●
Reuse of piping of R410A model is dangerous because
of its compressor oil.
●
When reuse piping of R410A model, pump down must
be carried out properly to ensure compressor oil which
is remained inside piping is collected away.
To Reuse Old Piping
●
Piping of R410A model can be reused only when air-
conditioner is properly pumped down.
●
The purpose of pump down is to collect back the
compressor oil (which is mixed with refrigerant and
circulating inside refrigeration cycle) properly into the
outdoor unit of air conditioner.
1
Operate air conditioner at
cooling mode for 10~15
minutes
2
After 10~15 minutes of pre
operation, close 2s valve.
After 3 minutes, close 4s
valve.
Reuse of piping R410A model only apply if previous
model is Hitachi and proper pump down method is
used.
CAUTION
3
Take out air conditioner unit.
4 Install New Refrigerant air
conditioner
Most Important
Process
Purpose: To make the
oil & refrigerant mix
together. They are in
separated condition
when air conditioner is
stopped.
Mixed
refrigerant
& oil will be
collected into
outdoor unit.
It is advisable to
fl
ush the piping with
R32 to avoid any
contamination remain
before new installation.
!
Insulation And Maintenance Of
Pipe Connection
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.
●
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 fluorescent 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.
Power Source And Operation
Test
3
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.
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.
The controller should be insert from top into
bottom side of the holder as shown below.
Installation Of Remote
Controller
2
If a wrong supply voltage is applied.
●
If a 220-230V model is connected to a 100V power
supply, all the indicators of the indoor unit blink.
Correct the voltage of the power outlet (It is not a
failure).
Perform a trial run to make sure that the air
conditioner operates properly.
1. Press the COOL button (in summer) or HEAT button
(in winter) of the remote controller.
2. Press the ROOM TEMPERATURE button to set the
temperature to 16°C for cooling mode or 32°C for
heating mode. Set the fan speed to “
” (HI).
3. Operate the air conditioner for at least 20 minutes
and make sure that the air from the air conditioner
is cool or warm.
4. Press the STOP button on the remote controller to
make sure that the air conditioner stops running.
●
If the indicators of the indoor unit blink during the
trial run, perform a check following the procedures
below.
Trial run
❖
Be sure to measure the
supply voltage before
connecting the power cord
into the power outlet.
●
To reset the power supply by switching the circuit
breaker OFF, and ON only after
●
waiting for at least 5 minutes; or
●
pressing the temporary switch button only once
while the power is OFF.
Indicator Blinking Mode
What to check
Make sure that the
voltage of the power
outlet is correct
according to the product
speci
fi
cation.
Make sure that the
connecting cord is
connected correctly and
securely.
All indicators blink
once repeatedly
(220-230V model).
All indicators blink
twice repeatedly.
Outdoor Unit
