Mitsubishi Electronics MXZ-2A20NA Air Conditioner User Manual


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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.
• Besuretoobservethewarningsandcautionsspeciedhereastheyincludeimportantitemsrelatedtosafety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
1-3. SPECIFICATIONS
CAUTION
(Couldleadtoseriousinjuryinparticularenvironmentswhenoperatedincorrectly.)
n
Do not install the unit by yourself (user).
Incompleteinstallationcouldcausereorelectricshock,injuryduetothe
unitfalling,orleakageofwater.Consultthedealerfromwhomyoupur
-
chasedtheunitoraqualiedinstaller.
n
Perform the installation securely referring to the installation manual.
Incompleteinstallationcouldcausereorelectricshock,injuryduetothe
unit falling, or leakage of water.
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
Perform electrical work according to the installation manual and be
sure to use an exclusive circuit. Do not connect other electrical appli-
ances to the circuit.
Ifthecapacityofthepowercircuitisinsufcientorthereisincomplete
electricalwork,itcouldresultinareoranelectricshock.
n
Do not damage the wires by applying excessive pressure with parts
or screws.
Damagedwirescouldcausere.
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
Usethespeciedwirestoconnecttheindoorandoutdoorunitsse
-
curelyandattachthewiresrmlytotheterminalblockconnecting
sections so the stress of the wires is not applied to the sections.
Incompleteconnectingandsecuringcouldcausere.
n
Donotinstalltheunitinaplacewhereinammablegasmayleak.
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.
Itcouldcauseareoranelectricshockduetodefectivecontact,defec
-
tive insulation, exceeding the permissible current, etc.
n
Besuretousethepartsprovidedorspeciedpartsfortheinstalla
-
tion work.
Theuseofdefectivepartscouldcauseaninjuryorleakageofwaterdue
toare,anelectricshock,theunitfalling,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,itcouldcauseelectricshockorre.Ifloosepartsarefoundonthe
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 or relocating the unit, make sure that no sub-
stanceotherthanthespeciedrefrigerant(R410A)entersthe
refrigerant circuit.
Anypresenceofforeignsubstancesuchasaircancauseabnormal
pressure rise or an explosion.
n
Do not discharge the refrigerant into the atmosphere. If refrigerant
leaks during installation, ventilate the room.
Ifrefrigerantcomesincontactwithare,harmfulgascouldbegener
-
ated.
n
Check that the refrigerant gas does not leak after installation has
been completed.
Ifrefrigerantgasleaksindoors,andcomesintocontactwiththeame
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
-
sureintherefrigerationcyclecouldbecomeabnormallyhigh.This
couldcausethepipestoburstorinjury.
n
Fastenaarenutwithatorquewrenchasspeciedinthis
manual.
Iffastenedtootight,aarenutmaybreakafteralongperiodandcause
refrigerant leakage.
n
The unit shall be installed in accordance with national wiring regu-
lations.
n
Ground the unit correctly.
Do not connect the ground to a gas pipe, water pipe, lightning rod or
telephone ground. Defective grounding could cause electric shock.
n
Install an ground leakage breaker depending on the installation
place.
If an ground leakage breaker is not installed, it could cause electric
shock.
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
Donottouchtheairinletorthealuminumnsoftheoutdoor
unit.
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
couldcauseamalfunction,smokeemission,orre.Also,adviseuser
to keep the area around the unit clean.
Model
Powersupply Pipe length and height difference
*2, *3, *4, *8
Rated
Voltage
Frequency
Max. pipe length per indoor
unit/formulti-system
Max.
height difference
Max. no. of bends per in-
doorunit/formultisystem
Refrigerant adjustment A
*5
MXZ-2A20NA
208/
230 V
60 Hz 25m(82ft)/50m(164ft) 15m(49ft) 25 / 70 20g/m(1.06ozeach5ft)
WARNING
(Couldleadtodeath,seriousinjury,etc.)
Phillips screwdriver
Level
Scale
Utilityknifeorscissors
Torque wrench
Wrench(orspanner)
4mm(5/32in.)hexagonalwrench
Flare tool for R410A
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter with reamer
1-2. REQUIRED TOOLS FOR INSTALLATION
*1Neverusepipeswiththicknesslessthanspecied.Thepressureresist-
ancewillbeinsufcient.
*2Useacopperpipeoracopper-alloyseamlesspipe.
*3 Be careful not to crush or bend the pipe during pipe bending.
*4Refrigerantpipebendingradiusmustbe100mm(4in.)ormore.
*5Ifpipelengthexceeds40m(131ft),additionalrefrigerant(R410A)charge
is required. (No additional charge is required for pipe length less than
40m(131ft).)
Additionalrefrigerant(m)=A×(pipelength(m)-40)
Additionalrefrigerant(ft) =A×
(pipelength(ft)-131)
5
*6Insulationmaterial:Heatresistingfoamplastic0.045specicgravity
*7Besuretousetheinsulationofspeciedthickness.Excessivethickness
maycauseincorrectinstallationoftheindoorunitandinsufcientthick
-
nessmaycausedewdrippage.
*
8
If the outdoor unit is installed higher than the indoor unit, max. height
differenceisreducedto10m(33ft).
JG79A039H01_En.indd 2 5/9/2008 2:23:41 PM
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