1
Contents
1. Safety precautions
► Beforeinstallingtheunit,makesureyoureadallthe“Safetyprecau-
tions”.
► Pleasereporttoortakeconsentbythesupplyauthoritybeforecon-
nectiontothesystem.
► EquipmentcomplyingwithIEC/EN61000-3-12
► Itisdesignedforuseintheresidential,commercialandlight-indus-
trialenvironment.
► PUMY-P250YBM,PUMY-P300YBM
“ThisequipmentcomplieswithIEC61000-3-12providedthatthe
short-circuitpowerSscisgreaterthanorequaltoSsc(*1)atthe
interfacepointbetweentheuser’ssupplyandthepublicsystem.Itis
theresponsibilityoftheinstalleroruseroftheequipmenttoensure,
byconsulationwiththedistributionnetworkoperatorifnecessary,
thattheequipmentisconnectedonlytoasupplywithashort-circuit
powerSscgreaterthanorequaltoSsc (*1)”
Ssc (*1)
Model Ssc (MVA)
PUMY-P250YBM 2.00
PUMY-P300YBM 2.28
Warning:
Describesprecautionsthatmustbeobservedtopreventdangerofinjuryor
deathtotheuser.
Caution:
Describesprecautionsthatmustbeobservedtopreventdamagetotheunit.
After installation work has been completed, explain the “Safety Precautions” use,
and maintenance of the unit to the customer according to the information in the
Operation Manual and perform the test run to ensure normal operation. Both the
Installation Manual and Operation Manual must be given to the user for keeping.
These manuals must be passed on to subsequent users.
: Indicates a part which must be grounded.
Warning:
Carefullyreadthelabelsafxedtothemainunit.
Conrmationofpartsattached
In addition to this manual, the following part is supplied with the outdoor unit.
It is used for grounding the S terminal of transmission terminal block TB7.
For details refer to “6. Electrical work”. Grounding lead wire
1. Safety precautions................................................ 1
2. Installation location ............................................... 3
3. Installing the outdoor unit .......................................... 7
4. Installing the refrigerant piping ...................................... 8
5. Drainage piping work............................................. 18
6. Electrical work .................................................. 19
7. Test run ....................................................... 28
8. Special Functions ............................................... 29
Caution:
• DonotventR410Aintotheatmosphere.
For safe and correct use, read this manual and the indoor unit installation manual thoroughly before installing the air-conditioner unit.
Warning:
• Theunitmustnotbeinstalledbytheuser.Askadealeroranauthorized
techniciantoinstalltheunit.Iftheunitisinstalledincorrectly,waterleakage,
electricshock,orremayresult.
• Forinstallationwork,followtheinstructionsintheinstallationmanualand
usetoolsandpipecomponentsspecicallymadeforusewithR410Arefrig-
erant.
TheR410ArefrigerantintheHFCsystemispressurized1.6timesthepres-
sureofusualrefrigerants.IfpipecomponentsnotdesignedforR410Arefrig-
erantareusedandtheunitisnotinstalledcorrectly,thepipesmayburstand
causedamageorinjuries.Inaddition,waterleakage,electricshock,orre
mayresult.
• Wheninstallingtheunit,useappropriateprotectiveequipmentandtoolsfor
safety.Failuretodosocouldcauseinjuries.
• Theunitmustbeinstalledaccordingtotheinstructionsinordertominimize
theriskofdamagefromearthquakes,typhoons,orstrongwinds.Anincor-
rectlyinstalledunitmayfalldownandcausedamageorinjuries.
• Theunitmustbesecurelyinstalledonastructurethatcansustainitsweight.
Iftheunitismountedonanunstablestructure,itmayfalldownandcause
damageorinjuries.
• Iftheairconditionerisinstalledinasmallroom,measuresmustbetaken
to prevent the refrigerant concentration in the room from exceeding the
safetylimit in theeventofrefrigerantleakage. Consult a dealerregarding
theappropriatemeasurestopreventtheallowableconcentrationfrombeing
exceeded.
Shouldtherefrigerantleakandcausetheconcentrationlimittobeexceeded,
hazardsduetolackofoxygenintheroommayresult.
• Ventilatetheroomifrefrigerantleaksduringoperation.Ifrefrigerantcomes
intocontactwithaame,poisonousgaseswillbereleased.
• Allelectricworkmustbeperformedbyaqualiedtechnicianaccordingto
localregulationsandtheinstructionsgiveninthismanual.Theunitsmust
be powered by dedicated power lines and the correct voltage and circuit
breakersmustbeused.Powerlineswithinsufcientcapacityorincorrect
electricalworkmayresultinelectricshockorre.
• UseC1220copperphosphorus,forcopperandcopperalloyseamlesspipes,
toconnecttherefrigerantpipes.Ifthepipesarenotconnectedcorrectly,the
unitwillnotbeproperlygroundedandelectricshockmayresult.
• Useonlyspeciedcablesforwiring.Thewiringconnectionsmustbemade
securelywithnotensionappliedontheterminalconnections.Also,never
splicethecablesforwiring(unlessotherwiseindicatedinthisdocument).
Failuretoobservetheseinstructionsmayresultinoverheatingorare.
• Theterminalblockcoverpaneloftheoutdoorunitmustbermlyattached.If
thecoverpanelismountedincorrectlyanddustandmoistureentertheunit,
electricshockorremayresult.
• Theapplianceshallbeinstalledinaccordancewithnationalwiringregula-
tions.
• Ifthesupplycordisdamaged,itmustbereplacedbythemanufacturer,its
serviceagentorsimilarlyqualiedpersonsinordertoavoidahazard.
• Wheninstallingorrelocating,orservicingtheairconditioner,useonlythe
speciedrefrigerant(R410A)tocharge the refrigerant lines. Do not mix it
withanyotherrefrigerantanddonotallowairtoremaininthelines.
Ifairismixedwiththerefrigerant,thenitcanbethecauseofabnormalhighpres-
sureintherefrigerantline,andmayresultinanexplosionandotherhazards.
Theuseofanyrefrigerantotherthanthatspeciedforthesystemwillcause
mechanicalfailureorsystemmalfunctionorunitbreakdown.Intheworst
case,thiscouldleadtoaseriousimpedimenttosecuringproductsafety.
• Donotperformpumpdownworkwhenthereisagasleak.Theintakeofair
orothergasescausesabnormallyhighpressureintherefrigerationcycle,
whichmaycauseexplosionorinjury.
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