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1. BEFORE INSTALLATION
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner.
• Besuretoobservethewarningsandcautionsspeciedhereastheyincludeimportantitemsrelatedtosafety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
1-2. SPECIFICATIONS
CAUTION
(Could lead to serious injury in particular environments when operated incorrectly.)
n
Do not install the unit by yourself (user).
Incompleteinstallationcouldcausereorelectricshock,injuryduetothe
unit falling, or leakage of water. Consult the dealer from whom you pur
-
chased
theunitoraqualiedinstaller.
n
P
erform the installation securely referring to the installation manual.
Incompleteinstallationcouldcause re,electricshock,injury duetothe
unit falling, or leakage of water.
n
When
installing the unit, use appropriate protective equipment and
tools for safety.
Failure to do so could cause injury.
n
Install
the unit securely in a place which can bear the weight of the
unit.
If the installation location cannot bear the weight of the unit, the unit
could fall causing injury.
n
Electrical work should be performed by a qualified, experienced
electrician, according to the installation manual. Be sure to use an
exclusive circuit. Do not connect other electrical appliances to the
circuit.
If the capacity of the power circuit is insufcient or there is incomplete
electricalwork,itcouldresultinareoranelectricshock.
n
Do not damage the wires by applying excessive pressure with parts
or screws.
Damagedwirescouldcausereorelectricshock.
n
Be sure to cut off the main power in case of setting up the indoor P.C.
board or wiring works.
Failure to do so could cause electric shock.
n
Usethespeciedwirestoconnecttheindoorandoutdoorunitsse-
curely
andattachthewiresrmly totheterminalblockconnecting
sections so the stress of the wires is not applied to the sections. Do
not extend the wires, or use intermediate connection.
Incompleteconnectingandsecuringcouldcausere.
n
Do
notinstalltheunitinaplacewhereinammablegasmayleak.
If gas leaks and accumulates in the area around the unit, it could cause
an explosion.
n
Do
not use intermediate connection of the power cord or the exten-
sion cord and do not connect many devices to one AC outlet.
Itcouldcauseareoranelectricshockduetodefectivecontact,defec-
tive
insulation, exceeding the permissible current, etc.
n
Be
suretousethepartsprovidedorspeciedpartsfortheinstalla-
tion work.
The use of defective parts could cause an injury or leakage of water due
toare,anelectricshock,theunitfalling,etc.
n
When plugging the power supply plug into the outlet, make sure
that there is no dust, clogging, or loose parts in both the outlet and
the plug. Make sure that the power supply plug is pushed complete-
ly into the outlet.
If there is dust, clogging, or loose parts on the power supply plug or the
outlet,itcouldcauseelectricshockorre.Ifloosepartsarefoundonthe
power supply plug, replace it.
n
Attach the electrical cover to the indoor unit and the service panel
to the outdoor unit securely.
If the electrical cover of the indoor unit and/or the service panel of the
outdoor unit are not attached securely, it could result in a re or an
electric shock due to dust, water, etc.
n
When installing, relocating, or servicing the unit, make sure that
no
substanceother than the specied refrigerant (R410A) enters
the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal
pressure rise and may result in explosion or injury. The use of any re
-
frigerant
otherthanthatspeciedforthesystemwillcausemechanical
failure, system malfunction, or unit breakdown. In the worst case, this
could lead to a serious impediment to securing product safety.
n
Do not discharge the refrigerant into the atmosphere. If refrigerant
leaks during installation, ventilate the room.
Ifrefrigerantcomesincontactwithare,harmfulgascouldbegener-
ated.
n
Check that the refrigerant gas does not leak after installation has
been completed.
Ifrefrigerantgasleaksindoors,andcomesintocontactwiththeame
of a fan heater, space heater, stove, etc., harmful substances will be
generated.
n
Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times more than R22. Not using appropri-
ate
tools or materials and incomplete installation could cause the pipes
to burst or injury.
n
When pumping down the refrigerant, stop the compressor before
disconnecting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is run-
ning
and the stop valve is open, air could be drawn in and the pressure
in the refrigeration cycle could become abnormally high. This could
cause the pipes to burst or injury.
n
When installing the unit, securely connect the refrigerant pipes
before starting the compressor.
If the compressor is started before the refrigerant pipes are connected
and when the stop valve is open, air could be drawn in and the pres
-
s
ure in the refrigeration cycle could become abnormally high. This
could cause the pipes to burst or injury.
n
Fastenaarenutwithatorquewrenchasspeciedinthismanual.
Iffastenedtootight,aarenutmaybreakafteralongperiodandcause
refrigerant leakage.
n
The unit shall be installed in accordance with national wiring regu-
lations.
n
Earth the unit correctly.
Do not connect the earth to a gas pipe, water pipe, lightning rod or tele-
phone
earth. Defective earthing could cause electric shock.
n
Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in electric shock
orre.
n
Perform the drainage/piping work securely according to the installa-
tion manual.
If there is defect in the drainage/piping work, water could drop from the
unit, soaking and damaging household goods.
n
Donottouchtheairinletorthealuminumnsoftheoutdoorunit.
This could cause injury.
n
Do not install the outdoor unit where small animals may live.
If small animals enter and touch the electric parts inside the unit, it
couldcause amalfunction,smoke emission,or re.Also, adviseuser
to keep the area around the unit clean.
WARNING
(Could lead to death, serious injury, etc.)
*1 Connect to the power switch which has a gap of 3 mm or more when
open to interrupt the source power phase. (When the power switch is shut
off, it must interrupt all phases.)
*2 Use wires in conformity with design 60245 IEC 57. Use the indoor/out-
door
connectingwireinconformitywiththewirespecicationsspeciedin
the installation manual of the indoor unit.
*3 Neverusepipeswith thicknesslessthanspecied. Thepressureresist-
ance
willbeinsufcient.
*4 Use a copper pipe or a copper-alloy seamless pipe.
*5 Be careful not to crush or bend the pipe during pipe bending.
*6 Refrigerant pipe bending radius must be 100 mm or more.
*7 Insulationmaterial:Heatresistingfoamplastic0.045specicgravity
*8 Besuretousetheinsulationofspeciedthickness.Excessivethickness
may cause incorrect installation of the indoor unit and insufcient thick
-
ness
may cause dew drippage.
*
9
If the outdoor unit is installed higher than the indoor unit, max. height
difference is reduced to 10 m.
*
10
If pipe length exceeds 20 m, additional refrigerant (R410A) charge is re-
quired. (No additional charge is required for pipe length less than 20 m.)
Additional refrigerant = A × (pipe length (m) - 20)
Required Tools for Installation
Phillips screwdriver
Level
Scale
Utility
knife or scissors
Torque wrench
Wrench (or spanner)
4 mm hexagonal wrench
Flare tool for R410A
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter with reamer
ENGLISH
CONTENTS
1. BEFORE INSTALLATION ............................................................1
2. OUTDOOR UNIT INSTALLATION ...............................................3
3.
FLARING WORK AND PIPE CONNECTION ...............................3
4.
PURGING PROCEDURES, LEAK TEST, AND TEST RUN .........4
5.
RELOCATION AND MAINTENANCE ..........................................5
Model
Power supply *1 Wirespecications*2 Pipe length and height difference
*3, *4, *5, *6, *7, *8
Rated
Voltage
Fre-
quency
Breaker
capacity
Power supply
Indoor/outdoor
connecting wire
Max. pipe length
per indoor unit /
for multi-system
Max. height
difference
*9
Max. no. of bends
per indoor unit /
for multi system
Refrigerant adjust
-
ment
A *10
MXZ-2D52VA 230 V 50 Hz 15 A 3-core 2.0 mm
2
4-core
1.0/1.5 mm
2
20 m / 30 m 15 m 20 / 30 20 g/m
JG79A641H01_en.indd 1 2013/09/06 15:47:04
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