<
IA0000: 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
!
●
Recommend to use
R32
fl
aring tool.
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.
Trimming tool
Copper pipe
Die
Die
Copper pipe
Flare nut
Torque
wrench
Wrench
Removal Of Air From The Pipe And Gas Leakage Inspection
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. (Be
sure to use R32 detector)
3
Outer
Diameter
mm (inch)
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
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
Wing nut type
Thickness
(mm)
0.8
0.8
0.8
0.0
~
0.5
0.0
~
0.5
0.0
~
0.5
Flare tool for R32
Clutch type
Conventional
fl
are tool
Outer
dia.of pipe
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
6.35 (1/4”)
9.52 (3/8”)
12.7 (1/2”)
15.87 (5/8”)
Spindle
Valve
head cap
Torque N·m
(kgf
·
cm)
14.0 – 18.0 (140 ~ 180)
33.0 – 42.0 (330 ~ 420)
50.0 – 62.0 (500 ~ 620)
19.6 – 24.5 (200 ~ 250)
19.6 – 24.5 (200 ~ 250)
29.4 – 34.3 (300 ~ 350)
12.3 – 15.7 (125 ~ 160)
3.92~5.88 (40~60)
9.80~10.78 (100~110)
Small dia. side
Large dia. side
Valve core cap
Small dia. side
Large dia. side
Small dia. side
Large dia. side
●
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 may
occur.
●
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
Procedures of Wiring
Detail of Cutting the Connecting Cord
●
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 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.
WARNING
!
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.
!
WARNING
●
THIS APPLIANCE MUST BE EARTHED.
1. Installation procedure and notice
Especially, the selection of installation place need great care for the split type air conditioner, because it is very dif
fi
cult to move
from place to place after the
fi
rst installation.
1.1 Wiring
(1) Those terminal blocks for connecting the indoor and outdoor cables should be installed starting from the righthand side, in a
sequence of 1, 2, 3, 4, 5; in accordance with the units’ numbering system, as illustrated in the diagram. The left hand-most
terminal block is for the power supply connection use.
(2) 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.
(3) The connecting cord must be
fi
xed by the band which is located near the terminal board.
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. 1-3-2)
(3) Fix the connecting cords and power cord with steel band certainly. (Fig. 1-3-2)
Fig. 1-1
Fig. 1-2
WARNING
●
If you cannot attach the side cover due to the connecting cord, press the connecting cord in 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.
●
The connecting cord should not touch to service valve and pipes. (It becomes high temperature in heating
operation.)
Wiring of The Outdoor Unit
●
Please remove the side cover for wire connection.
!
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 gauges list below for the lead-in from a pole transformer and for the wiring from a switch board
of fuse box to the main switch and outdoor unit in consideration of the locked rotor current.
●
Do not connect wrongly at terminal “1 2 3” of indoor and outdoor unit.
To avoid misconnection, please refer attached terminal label as shown in Fig. 1-3-1.
●
To avoid connecting cord scratch or clamp by side cover, it must be
fi
x by band as shown in Fig. 1-3-2.
●
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 regulator is recommended.
Circuit Breaker
25A
Bind connecting cords to make them
fi
t between the convex sections.
Grounding rod (optional)
(Earth wire and grounding rod are not supplied. Please use optional
items below.)
IMPORTANT
Type of grounding rod
SP-EB-2
Length
900mm
Cable length
up to 25m
Wire cross-section
2.5mm
2
IMPORTANT
Fig. 1-3-2
CAUTION
Note:
●
Outdoor supply cords shall not
be lighter than polychloroprene
sheathed flexible cord with code
designation 60245 IEC 57.
!
Connect the power
supply earth cord at
this earth screw.
After remove the
screw and cover,
put the connecting
cables and
fi
x the
cover with screw.
Fig. 1-3-1
Arrange power cord so they do
not touch service valve.
CAUTION
!
This system integrates 5 sub-systems of piping with 1 pair of service valves installed. That pair will be used for air purging and pumping
down operations. Furthermore, due to valves are not installed to cover up the connecting mouths, there is a need for all unutilized
connecting mouths to be tightly covered up by seal caps and
fl
ared nuts.
CAUTION:
Should all unutilized connecting mouths are not tightly covered up by seal caps and
fl
ared nuts, there will be potential gas
leaks occurring.
1. Air purging by using vacuum pump
Remove the valve cap from the service valves located at both the large and small pipe rims.
After removing the valve cap of the valve core of the service valves located at the large pipe rim, connect the charging
hose A.
After connecting the vacuum suction pump adaptor, connect the charging hose B to the adaptor.
During relocation or at any one time when the air conditioner unit is removed and re-installed, there is a possibility
of getting a closed electric-powered valve. Should the electric-powered valve be closed, even with air purging being
conducted, certain amount of air is still trapped within that area, hence, there is a need to open up the electric-powered
valve to do an air purging. Under such circumstances, before using the vacuum-suction pump, the main power supply
(LN terminal) should be connected to enable a complete opening up of the valve. After connecting the power supply for
approximately 90 seconds, the valve will be fully opened up, after which disconnect the power supply and start using the
vacuum suction pump.
(Refer to “Power Supply Terminal Connections” in regards to the LN terminal)
CAUTION: Ingress of air during the operating cycle may cause increase in pressure and other breakdowns.
Switch off the outdoor unit’s power supply
Shutting off via the manifold valve handle Hi, the handle Lo will open up and operate the vacuum pump that will run a
vacuum suction for approximately 60 minutes.
Upon a full shut off via the manifold valve handle Lo, the vacuum pump will stop operating.
Check to ensure that there is no gas leakage.
After removing the charging hose A, rotate the service valve spindles (2 units on both sides) in an anti-clockwise
direction to fully open up.
Reinstall the cap nuts to their original positions and tighten them to their speci
fi
ed torque values.
Disconnect the charge hose from the service valve.
Tighten the valve cap of valve core.
[Torque 12.3 - 15.7 N·m (125 - 160 kgf·cm)]
Attach the valve cap to the spindles of each large and small dia. pipe side service valves.
Tighten the valve cap of the spindle.
[Torque 19.6 - 24.5 N·m (200 - 250 kgf·cm)]
FINAL
ST
AGE OF INST
ALLA
TION
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.
Power Source And Operation Test
2
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.
●
If the indoor unit does not operate, check to see that the
connections are correct.
Insulation material for pipe connection
Putty
Putty
Sleeve of
protection pipe
CAUTION
●
Trial run should be conducted on one unit at a time
to check for incorrect wiring of connecting cord.
!
Pump Down Method When Reuse
Existing Piping (R410A Model) for
R32 Model
●
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.
Reuse of piping R410A model only apply if previous
model is Hitachi and proper pump down method is used.
CAUTION
!
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.
!