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)
<
IA1890: B
>
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
!
CONNECTION OF POWER CORD
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.
AIR REMOV
AL
When the meter reaches - 101KPa (-76cmHg)
during pumping, fully tighten the shuttle.
/R
+L
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
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.
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
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.
●
Open the side plate by
unscrewing the screws as
shown beside.
Please face this side (suction
side) of the unit to the wall.
Please
remove
side cover
when
connecting
the piping
and
connecting
cord.
CAUTION
!
Please make sure to remove all
spacers inside the unit.
●
Open the Top, Back and Side
cover of the unit.
●
Pull out the spacers inside.
(Spacers are only for
transportation purpose).
If not remove, vibration and
noise will occur.
Top cover
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.
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.
Side cover
Back cover
Pull downward
BASE
DRAIN PIPE
Spacer
inside
Procedures of Wiring
Indoor Unit
Outdoor Unit
Detail of Cutting the Connecting Cord
Connecting cord
Outdoor Unit
Indoor Unit
Power line
Green + Yellow
(ground)
Green + Yellow
(ground)
Connecting cord
Connecting cord
Strip wires
Strip wires
Green +
Yellow
●
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
!
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.
Cord band
After remove the
screw and terminal
cover, and put the
connecting cords and
fi
x the terminal cover
with screw.
Connecting cord
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.
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.
How to connect the optional parts
(RAC Adapter, Dry contact, Wired Remote Controller)
●
For cable connection to control P.W.B., you need to remove front cover and
electrical box cover.
Each connecting location is as below.
1
Dry contact: CN6
2 H-LINK:
CN7
3
Wired Remote Controller : CN20
●
Please check and con
fi
rm manuals attached to each optional parts for more
connection details.
●
You can refer to this installation manual how to remove and re-attach the
front cover.
●
Please be careful not to damage lead wires by edge of plate when connecting
the optional parts.
Wiring of The Outdoor Unit
●
Please remove the side cover for wire connection.
WARNING
!
●
If you cannot attach the side plate due to the connection 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.
●
The connecting cord should not touch to service valve and pipes. (It becomes high temperature
in heating operation.)
●
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.
Earth terminal
Outdoor supply cords shall not be lighter than
polychloroprene sheathed
fl
exible cord with
code designation 60245 IEC 57.
IMPORTANT
Circuit Breaker
20A
Wire length
up to 30 m
Wire cross-section
1.5mm
2
For (Connecting cord - 1, 2, 3, Earth)
Wire cross-section
2.5 mm
2
For (Power cord - L, N, Earth)
!
WARNING
THIS APPLIANCE MUST BE EARTHED.
Power cord
Electrical cover
Connecting cord
Screw
Checking for the electric source and the voltage range
Cover
CAUTION
Wrench
Flare nut
Torque
wrench
Copper pipe
Trimming tool
Cap of valve
head
Hexagonal
Wrench Key
Cap of valve core
The body of
service valve
Cap of valve head
!
BURST HAZARD
Do not allow air, etc. to get into refrigerant
cycle (piping)
RISK OF EXPLOSION
Compressor must be stopped before
removing refrigerant pipes.
All service valve must be fully closed after
pumping down operation.
WARNING
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
fl
orescent 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
Remote Controller
Screw (2 pieces)
Holder for Remote Controller
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.
Trial run
❖
Be sure to measure
the supply voltage
before plugging the
power cord into the
power outlet.
Must install air conditioner according to the electrical installation standards for
Thailand of the Engineering Institue of Thailand under The Royal Patronage
of His Majesty (the King).
BUSH
DRAIN PIPE
BUSH
100 mm
ABOVE
●
Recommend to use
R32
fl
aring tool
Die
Die
Copper pipe
Gas Leakage Inspection