Daikin RKXYQ5T7Y1B User manual

Installation and operation manual
VRV IV compressor unit for indoor installation English
Installation and operation
manual
VRV IV compressor unit for indoor installation
RKXYQ5T7Y1B

3P397286-2B
CE - DECLARATION-OF-CONFORMITY CE - DECLARACION-DE-CONFORMIDAD CE - DECLARAÇÃO-DE-CONFORMIDADE CE - ERKLÆRING OM-SAMSVAR CE - IZJAVA-O-USKLAĐENOSTI CE - IZJAVA O SKLADNOSTI CE - ATITIKTIES-DEKLARACIJA
CE - KONFORMITÄTSERKLÄRUNG CE - DICHIARAZIONE-DI-CONFORMITA CE - ЗАЯВЛЕНИЕ-О-СООТВЕТСТВИИ CE - ILMOITUS-YHDENMUKAISUUDESTA CE - MEGFELELŐSÉGI-NYILATKOZAT CE - VASTAVUSDEKLARATSIOON CE - ATBILSTĪBAS-DEKLARĀCIJA
CE - DECLARATION-DE-CONFORMITE CE - ΔHΛΩΣΗ ΣΥΜΜΟΡΦΩΣΗΣ CE - OVERENSSTEMMELSESERKLÆRING CE - PROHLÁŠENÍ-O-SHODĚ CE - DEKLARACJA-ZGODNOŚCI CE - ДЕКЛАРАЦИЯ-ЗА-СЪОТВЕТСТВИЕ CE - VYHLÁSENIE-ZHODY
CE - CONFORMITEITSVERKLARING CE - FÖRSÄKRAN-OM-ÖVERENSTÄMMELSE CE - DECLARAŢIE-DE-CONFORMITATE CE - UYGUNLUK-BEYANI
Daikin Europe N.V. 01 02 03 04 05 06 07 08
declares under its sole responsibility that the air conditioning models to which this declaration relates: erklärt auf seine alleinige Verantwortung daß die Modelle der Klimageräte für die diese Erklärung bestimmt ist: déclare sous sa seule responsabilité que les appareils d'air conditionné visés par la présente déclaration: verklaart hierbij op eigen exclusieve verantwoordelijkheid dat de airconditioning units waarop deze verklaring betrekking heeft: declara baja su única responsabilidad que los modelos de aire acondicionado a los cuales hace referencia la declaración: dichiara sotto sua responsabilità che i condizionatori modello a cui è riferita questa dichiarazione: δηλώνει με αποκλειστική της ευθύνη ότι τα μοντέλα των κλιματιστικών συσκευών στα οποία αναφέρεται η παρούσα δήλωση: declara sob sua exclusiva responsabilidade que os modelos de ar condicionado a que esta declaração se refere:
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заявляет, исключительно под свою ответственность, что модели кондиционеров воздуха, к которым относится настоящее заявление: erklærer under eneansvar, at klimaanlægmodellerne, som denne deklaration vedrører: deklarerar i egenskap av huvudansvarig, att luftkonditioneringsmodellerna som berörs av denna deklaration innebär att: erklærer et fullstendig ansvar for at de luftkondisjoneringsmodeller som berøres av denne deklarasjon, innebærer at: ilmoittaa yksinomaan omalla vastuullaan, että tämän ilmoituksen tarkoittamat ilmastointilaitteiden mallit: prohlašuje ve své plné odpovědnosti, že modely klimatizace, k nimž se toto prohlášení vztahuje: izjavljuje pod isključivo vlastitom odgovornošću da su modeli klima uređaja na koje se ova izjava odnosi: teljes felelőssége tudatában kijelenti, hogy a klímaberendezés modellek, melyekre e nyilatkozat vonatkozik:
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deklaruje na własną i wyłączną odpowiedzialność, że modele klimatyzatorów, których dotyczy niniejsza deklaracja: declară pe proprie răspundere că aparatele de aer condiţionat la care se referă această declaraţie: z vso odgovornostjo izjavlja, da so modeli klimatskih naprav, na katere se izjava nanaša: kinnitab oma täielikul vastutusel, et käesoleva deklaratsiooni alla kuuluvad kliimaseadmete mudelid: декларира на своя отговорност, че моделите климатична инсталация, за които се отнася тази декларация: visiška savo atsakomybe skelbia, kad oro kondicionavimo prietaisų modeliai, kuriems yra taikoma ši deklaracija: ar pilnu atbildību apliecina, ka tālāk uzskaitīto modeļu gaisa kondicionētāji, uz kuriem attiecas šī deklarācija: vyhlasuje na vlastnú zodpovednosť, že tieto klimatizačné modely, na ktoré sa vzťahuje toto vyhlásenie: tamamen kendi sorumluluǧunda olmak üzere bu bildirinin ilgili olduǧu klima modellerinin aşaǧıdaki gibi olduǧunu beyan eder:
RDXYQ5T7V1B*, RKXYQ5T7Y1B*, * = ,,1,2,3,…,9 01 02 03 04 05 06 07
are in conformity with the following standard(s) or other normative document(s), provided that these are used in accordance with our instructions: der/den folgenden Norm(en) oder einem anderen Normdokument oder -dokumenten entspricht/entsprechen, unter der Voraussetzung, daß sie gemäß unseren Anweisungen eingesetzt werden: sont conformes à la/aux norme(s) ou autre(s) document(s) normatif(s), pour autant qu'ils soient utilisés conformément à nos instructions: conform de volgende norm(en) of één of meer andere bindende documenten zijn, op voorwaarde dat ze worden gebruikt overeenkomstig onze instructies: están en conformidad con la(s) siguiente(s) norma(s) u otro(s) documento(s) normativo(s), siempre que sean utilizados de acuerdo con nuestras instrucciones: sono conformi al(i) seguente(i) standard(s) o altro(i) documento(i) a carattere normativo, a patto che vengano usati in conformità alle nostre istruzioni: είναι σύμφωνα με το(α) ακόλουθο(α) πρότυπο(α) ή άλλο έγγραφο(α) κανονισμών, υπό την προϋπόθεση ότι χρησιμοποιούνται σύμφωνα με τις οδηγίες μας:
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estão em conformidade com a(s) seguinte(s) norma(s) ou outro(s) documento(s) normativo(s), desde que estes sejam utilizados de acordo com as nossas instruções: соответствуют следующим стандартам или другим нормативным документам, при условии их использования согласно нашим инструкциям: overholder følgende standard(er) eller andet/andre retningsgivende dokument(er), forudsat at disse anvendes i henhold til vore instrukser: respektive utrustning är utförd i överensstämmelse med och följer följande standard(er) eller andra normgivande dokument, under förutsättning att användning sker i överensstämmelse med våra instruktioner: respektive utstyr er i overensstemmelse med følgende standard(er) eller andre normgivende dokument(er), under forutssetning av at disse brukes i henhold til våre instrukser: vastaavat seuraavien standardien ja muiden ohjeellisten dokumenttien vaatimuksia edellyttäen, että niitä käytetään ohjeidemme mukaisesti: za předpokladu, že jsou využívány v souladu s našimi pokyny, odpovídají následujícím normám nebo normativním dokumentům: u skladu sa slijedećim standardom(ima) ili drugim normativnim dokumentom(ima), uz uvjet da se oni koriste u skladu s našim uputama:
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megfelelnek az alábbi szabvány(ok)nak vagy egyéb irányadó dokumentum(ok)nak, ha azokat előírás szerint használják: spełniają wymogi następujących norm i innych dokumentów normalizacyjnych, pod warunkiem że używane są zgodnie z naszymi instrukcjami: sunt în conformitate cu următorul (următoarele) standard(e) sau alt(e) document(e) normativ(e), cu condiţia ca acestea să fie utilizate în conformitate cu instrucţiunile noastre: skladni z naslednjimi standardi in drugimi normativi, pod pogojem, da se uporabljajo v skladu z našimi navodili: on vastavuses järgmis(t)e standardi(te)ga või teiste normatiivsete dokumentidega, kui neid kasutatakse vastavalt meie juhenditele: съответстват на следните стандарти или други нормативни документи, при условие, че се използват съгласно нашите инструкции: atitinka žemiau nurodytus standartus ir (arba) kitus norminius dokumentus su sąlyga, kad yra naudojami pagal mūsų nurodymus: tad, ja lietoti atbilstoši ražotāja norādījumiem, atbilst sekojošiem standartiem un citiem normatīviem dokumentiem: sú v zhode s nasledovnou(ými) normou(ami) alebo iným(i) normatívnym(i) dokumentom(ami), za predpokladu, že sa používajú v súlade snašim návodom: ürünün, talimatlarımıza göre kullanılması koşuluyla aşağıdaki standartlar ve norm belirten belgelerle uyumludur:
EN60335-2-40, 01 02 03 04 05 06 07 08 09
following the provisions of: gemäß den Vorschriften der: conformément aux stipulations des: overeenkomstig de bepalingen van: siguiendo las disposiciones de: secondo le prescrizioni per: με τήρηση των διατάξεων των: de acordo com o previsto em: в соответствии с положениями:
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under iagttagelse af bestemmelserne i: enligt villkoren i: gitt i henhold til bestemmelsene i: noudattaen määräyksiä: za dodržení ustanovení předpisu: prema odredbama: követi a(z): zgodnie z postanowieniami Dyrektyw: în urma prevederilor:
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ob upoštevanju določb: vastavalt nõuetele: следвайки клаузите на: laikantis nuostatų, pateikiamų: ievērojot prasības, kas noteiktas: održiavajúc ustanovenia: bunun koşullarına uygun olarak:
Machinery 2006/42/EC
Electromagnetic Compatibility 2004/108/EC
**
*
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Directives, as amended. Direktiven, gemäß Änderung. Directives, telles que modifiées. Richtlijnen, zoals geamendeerd. Directivas, según lo enmendado. Direttive, come da modifica. Οδηγιών, όπως έχουν τροποποιηθεί. Directivas, conforme alteração em. Директив со всеми поправками.
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Direktiver, med senere ændringer. Direktiv, med företagna ändringar. Direktiver, med foretatte endringer. Direktiivejä, sellaisina kuin ne ovat muutettuina. v platném znění. Smjernice, kako je izmijenjeno. irányelv(ek) és módosításaik rendelkezéseit. z późniejszymi poprawkami. Directivelor, cu amendamentele respective.
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Direktive z vsemi spremembami. Direktiivid koos muudatustega. Директиви, с техните изменения. Direktyvose su papildymais. Direktīvās un to papildinājumos. Smernice, v platnom znení. Deǧiştirilmiş halleriyle Yönetmelikler.
01Note* 02Hinweis* 03Remarque* 04Bemerk* 05Nota*
as set out in <A> and judged positively by <B> according to the Certificate<C>.
wie in <A> aufgeführt und von <B> positiv beurteilt gemäß Zertifikat<C>. tel que défini dans <A> et évalué positivement par <B> conformément au Certificat<C>. zoals vermeld in <A> en positief beoordeeld door <B> overeenkomstig Certificaat<C>. como se establece en <A> y es valorado positivamente por <B> de acuerdo con el Certificado<C>.
06Nota* 07Σημείωση* 08Nota* 09Примечание* 10Bemærk*
delineato nel <A> e giudicato positivamente da<B> secondo il Certificato<C>. όπως καθορίζεται στο <A> και κρίνεται θετικά από το <B> σύμφωνα με το Πιστοποιητικό<C>. tal como estabelecido em <A> e com o parecer positivo de <B> de acordo com o Certificado<C>. как указано в <A> и в соответствии сположительным решением <B> согласно Свидетельству<C>. som anført i <A> og positivt vurderet af <B> ihenhold til Certifikat<C>.
11Information* 12Merk* 13Huom* 14Poznámka* 15Napomena*
enligt <A> och godkänts av <B> enligt Certifikatet<C>. som det fremkommer i <A> og gjennom positiv bedømmelse av <B> ifølge Sertifikat<C>. jotka on esitetty asiakirjassa <A> ja jotka <B> on hyväksynyt Sertifikaatin<C> mukaisesti. jak bylo uvedeno v <A> a pozitivně zjištěno <B> vsouladu sosvědčením<C>. kako je izloženo u <A> i pozitivno ocijenjeno odstrane <B> prema Certifikatu<C>.
16Megjegyzés* 17Uwaga* 18Notă* 19Opomba* 20Märkus*
a(z) <A> alapján, a(z) <B> igazolta a megfelelést, a(z) <C>tanúsítvány szerint. zgodnie z dokumentacją <A>, pozytywną opinią <B> i Świadectwem<C>. aşa cum este stabilit în <A> şi apreciat pozitiv de<B> în conformitate cu Certificatul<C>. kot je določeno v <A> in odobreno s strani <B> vskladu scertifikatom<C>. nagu on näidatud dokumendis <A> ja heaks kiidetud <B> järgi vastavalt sertifikaadile<C>.
21Забележка* 22Pastaba* 23Piezīmes* 24Poznámka* 25Not*
както е изложено в <A> и оценено положително от <B> съгласно Сертификата<C>. kaip nustatyta <A> ir kaip teigiamai nuspręsta <B> pagal Sertifikatą<C>. kā norādīts <A> un atbilstoši <B> pozitīvajam vērtējumam saskaņā ar sertifikātu<C>. ako bolo uvedené v <A> a pozitívne zistené <B> vsúlade s osvedčením<C>. <A>’da belirtildiği gibi ve <C>Sertifikasına göre <B> tarafından olumlu olarak değerlendirildiği gibi.
<A> <B> <C>
TÜV (NB1856) 12080901.T30 DAIKIN.TCF.030A17/06-2015
01** 02** 03** 04** 05** 06**
Daikin Europe N.V. is authorised to compile the Technical Construction File. Daikin Europe N.V. hat die Berechtigung die Technische Konstruktionsakte zusammenzustellen. Daikin Europe N.V. est autorisé à compiler le Dossier de Construction Technique. Daikin Europe N.V. is bevoegd om het Technisch Constructiedossier samen te stellen. Daikin Europe N.V. está autorizado a compilar el Archivo de Construcción Técnica. Daikin Europe N.V. è autorizzata a redigere il File Tecnico di Costruzione.
07** 08** 09** 10** 11** 12**
Η Daikin Europe N.V. είναι εξουσιοδοτημένη να συντάξει τον Τεχνικό φάκελο κατασκευής. A Daikin Europe N.V. está autorizada a compilar a documentação técnica de fabrico. Компания Daikin Europe N.V. уполномочена составить Комплект технической документации. Daikin Europe N.V. er autoriseret til at udarbejde de tekniske konstruktionsdata. Daikin Europe N.V. är bemyndigade att sammanställa den tekniska konstruktionsfilen. Daikin Europe N.V. har tillatelse til å kompilere den Tekniske konstruksjonsfilen.
13** 14** 15** 16** 17** 18**
Daikin Europe N.V. on valtuutettu laatimaan Teknisen asiakirjan. Společnost Daikin Europe N.V. má oprávnění ke kompilaci souboru technické konstrukce. Daikin Europe N.V. je ovlašten za izradu Datoteke o tehničkoj konstrukciji. A Daikin Europe N.V. jogosult a műszaki konstrukciós dokumentáció összeállítására. Daikin Europe N.V. ma upoważnienie do zbierania i opracowywania dokumentacji konstrukcyjnej. Daikin Europe N.V. este autorizat să compileze Dosarul tehnic de construcţie.
19** 20** 21** 22** 23** 24** 25**
Daikin Europe N.V. je pooblaščen za sestavo datoteke s tehnično mapo. Daikin Europe N.V. on volitatud koostama tehnilist dokumentatsiooni. Daikin Europe N.V. е оторизирана да състави Акта за техническа конструкция. Daikin Europe N.V. yra įgaliota sudaryti šį techninės konstrukcijos failą. Daikin Europe N.V. ir autorizēts sastādīt tehnisko dokumentāciju. Spoločnosť Daikin Europe N.V. je oprávnená vytvoriť súbor technickej konštrukcie. Daikin Europe N.V. Teknik Yapı Dosyasını derlemeye yetkilidir.
Shigeki Morita Director Ostend, 1st of September, 2015

Table of Contents
Installation and operation manual
3
RKXYQ5T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
Table of Contents
1 About the documentation 4
1.1 About this document.................................................................. 4
For the installer 4
2 About the box 4
2.1 Compressor unit ........................................................................ 4
2.1.1 To remove the accessories from the compressor unit 4
2.1.2 To remove the transportation stay .............................. 4
3 About the units and options 5
3.1 About the compressor unit and heat exchanger unit................. 5
3.2 System layout............................................................................ 5
4 Preparation 5
4.1 Preparing installation site .......................................................... 5
4.1.1 Installation site requirements of the compressor unit.. 5
4.2 Preparing refrigerant piping....................................................... 5
4.2.1 Refrigerant piping requirements.................................. 5
4.2.2 Refrigerant piping material.......................................... 5
4.2.3 To select the piping size ............................................. 6
4.2.4 To select refrigerant branch kits.................................. 6
4.3 Preparing electrical wiring ......................................................... 6
4.3.1 Safety device requirements ........................................ 6
5 Installation 7
5.1 Opening the units ...................................................................... 7
5.1.1 To open the compressor unit ...................................... 7
5.2 Mounting the compressor unit ................................................... 7
5.2.1 Guidelines when installing the compressor unit.......... 7
5.3 Connecting the refrigerant piping .............................................. 7
5.3.1 Using the stop valve and service port......................... 7
5.3.2 To remove the pinched pipes...................................... 8
5.3.3 To connect the refrigerant piping to the compressor
unit .............................................................................. 9
5.4 Checking the refrigerant piping ................................................. 10
5.4.1 About checking the refrigerant piping ......................... 10
5.4.2 Checking refrigerant piping: General guidelines......... 10
5.4.3 Checking refrigerant piping: Setup.............................. 10
5.4.4 To perform a leak test................................................. 11
5.4.5 To perform vacuum drying.......................................... 11
5.5 To insulate the refrigerant piping............................................... 11
5.6 Charging refrigerant .................................................................. 11
5.6.1 Precautions when charging refrigerant ....................... 11
5.6.2 To determine the additional refrigerant amount.......... 12
5.6.3 To charge refrigerant .................................................. 12
5.6.4 Error codes when charging refrigerant........................ 13
5.6.5 To fix the fluorinated greenhouse gases label ............ 13
5.7 Connecting the electrical wiring................................................. 13
5.7.1 Field wiring: Overview................................................. 13
5.7.2 Guidelines when connecting the electrical wiring ....... 14
5.7.3 To connect the electrical wiring on the compressor
unit .............................................................................. 14
5.8 Finishing the compressor unit installation ................................. 15
5.8.1 To finish the transmission wiring................................. 15
6 Configuration 15
6.1 Making field settings.................................................................. 15
6.1.1 About making field settings......................................... 15
6.1.2 To access the field setting components...................... 15
6.1.3 Field setting components............................................ 15
6.1.4 To access mode 1 or 2 ............................................... 16
6.1.5 To use mode 1 (and default situation) ........................ 16
6.1.6 To use mode 2............................................................ 17
6.1.7 Mode 1 (and default situation): Monitoring settings .... 17
6.1.8 Mode 2: Field settings.................................................. 18
6.1.9 To connect the PC configurator to the compressor
unit ............................................................................... 20
7 Commissioning 20
7.1 Precautions when commissioning .............................................. 20
7.2 Checklist before commissioning................................................. 20
7.3 Checklist during commissioning ................................................. 21
7.3.1 About test run............................................................... 21
7.3.2 To perform a test run (7-LEDs display)........................ 21
7.3.3 Correcting after abnormal completion of the test run... 22
7.3.4 Operating the unit ........................................................ 22
8 Troubleshooting 22
8.1 Solving problems based on error codes..................................... 22
8.1.1 Error codes: Overview ................................................. 22
9 Technical data 24
9.1 Piping diagram: Compressor unit and heat exchanger unit ....... 24
9.2 Wiring diagram: Compressor unit............................................... 24
For the user 25
10 About the system 25
10.1 System layout............................................................................. 25
11 User interface 25
12 Operation 25
12.1 Operation range ......................................................................... 25
12.2 Operating the system ................................................................. 26
12.2.1 About operating the system ......................................... 26
12.2.2 About cooling, heating, fan only, and automatic
operation ...................................................................... 26
12.2.3 About the heating operation......................................... 26
12.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) .............................. 26
12.2.5 To operate the system (WITH cool/heat changeover
remote control switch).................................................. 26
12.3 Using the dry program................................................................ 27
12.3.1 About the dry program ................................................. 27
12.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) .............................. 27
12.3.3 To use the dry program (WITH cool/heat changeover
remote control switch).................................................. 27
12.4 Adjusting the air flow direction.................................................... 27
12.4.1 About the air flow flap .................................................. 27
12.5 Setting the master user interface ............................................... 27
12.5.1 About setting the master user interface ....................... 27
12.5.2 To designate the master user interface (VRV DX)....... 28
13 Maintenance and service 28
13.1 After-sales service and warranty ................................................ 28
13.1.1 Warranty period ........................................................... 28
13.1.2 Recommended maintenance and inspection............... 28
14 Troubleshooting 28
14.1 Error codes: Overview................................................................ 29
14.2 Symptoms that are not air conditioner troubles.......................... 30
14.2.1 Symptom: The system does not operate ..................... 30
14.2.2 Symptom: Cool/Heat cannot be changed over ............ 30
14.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work...................................................... 30
14.2.4 Symptom: The fan strength does not correspond to
the setting .................................................................... 30
14.2.5 Symptom: The fan direction does not correspond to
the setting .................................................................... 30
14.2.6 Symptom: White mist comes out of a unit (Indoor
unit) .............................................................................. 30
14.2.7 Symptom: White mist comes out of a unit (Indoor
unit, heat exchanger unit) ............................................ 30

1 About the documentation
Installation and operation manual
4
RKXYQ5T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
14.2.8 Symptom: The user interface display reads "U4" or
"U5" and stops, but then restarts after a few minutes. 30
14.2.9 Symptom: Noise of air conditioners (Indoor unit, heat
exchanger unit) ........................................................... 30
14.2.10 Symptom: Noise of air conditioners (Indoor unit,
compressor unit, heat exchanger unit)........................ 31
14.2.11 Symptom: Noise of air conditioners (compressor
unit, heat exchanger unit) ........................................... 31
14.2.12 Symptom: Dust comes out of the heat exchanger
unit .............................................................................. 31
14.2.13 Symptom: The units can give off odours..................... 31
14.2.14 Symptom: The heat exchanger unit fan does not spin 31
14.2.15 Symptom: The display shows "88".............................. 31
14.2.16 Symptom: The compressor in the compressor unit
does not stop after a short heating operation ............. 31
14.2.17 Symptom: The inside of an compressor unit is warm
even when the unit has stopped ................................. 31
14.2.18 Symptom: Hot air can be felt when the indoor unit is
stopped ....................................................................... 31
15 Relocation 31
16 Disposal 31
1 About the documentation
1.1 About this document
Target audience
Authorised installers + end users
INFORMATION
This appliance is intended to be used by expert or trained
users in shops, in light industry and on farms, or for
commercial use by lay persons.
Documentation set
This document is part of a documentation set. The complete set
consists of:
▪General safety precautions:
▪ Safety instructions that you must read before installing
▪ Format: Paper (in the accessory bag of the compressor unit)
▪Compressor unit installation and operation manual:
▪ Installation and operation instructions
▪ Format: Paper (in the accessory bag of the compressor unit)
▪Heat exchanger unit installation manual:
▪ Installation instructions
▪ Format: Paper (in the accessory bag of the heat exchanger
unit)
▪Installer and user reference guide:
▪ Preparation of the installation, technical specifications,
reference data,…
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on http://www.daikineurope.com/support-
and-manuals/product-information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.
The original documentation is written in English. All other languages
are translations.
For the installer
2 About the box
2.1 Compressor unit
2.1.1 To remove the accessories from the
compressor unit
1Remove the accessories (part 1).
a1× b1× c1× d1× e1× f3×
2Remove the service cover. See "5.1.1To open the compressor
unit"on page7.
3Remove the accessories (part 2).
1× 1×1×1× i jhg
aGeneral safety precautions
bCompressor unit installation and operation manual
cFluorinated greenhouse gases label
dMultilingual fluorinated greenhouse gases label
eScrew (for shield of transmission wiring)
fCable tie
gGas piping accessory (circuit 1: to heat exchanger unit)
(Ø19.1mm)
hLiquid piping accessory (circuit 1: to heat exchanger unit)
(Ø12.7mm)
iLiquid piping accessory (circuit 2: to indoor units)
(Ø9.5mm)
jGas piping accessory (circuit 2: to indoor units)
(Ø15.9mm)
2.1.2 To remove the transportation stay
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The transportation stay installed over the compressor leg for
protecting the unit during transport must be removed. Proceed as
shown in the figure and procedure below.
1Slightly loosen the fixing nut (a).
2Remove the transportation stay (b) as shown in the figure
below.
3Tighten the fixing nut (a) again.

3 About the units and options
Installation and operation manual
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RKXYQ5T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
·
3
1
(10.1 N·m)
2
a
b
3 About the units and options
3.1 About the compressor unit and
heat exchanger unit
The compressor unit and heat exchanger unit are intended for indoor
installation and aimed for air to air heat pump applications.
Specification RKXYQ5+RDXYQ5
Maximum capacity Heating 16kW
Cooling 14kW
Outside ambient
design temperature
Heating –20~15.5°CWB
Cooling –5~46°CDB
Ambient design temperature of compressor
unit and heat exchanger unit
5~35°CDB
(26°CWB)
3.2 System layout
NOTICE
Design of the system must not be done at temperatures
below –15°C.
d d
c c
a
b
VRV DX VRV DX VRV DX EKEXV
AHU
d d
1 2
1In case of VRVDX indoor units
2In case of VRVDX indoor units combined with an air
handling unit
aHeat exchanger unit
bCompressor unit
cRefrigerant piping
dUser interface (dedicated depending on indoor unit type)
VRVDX VRV direct expansion (DX) indoor unit
EKEXV Expansion valve kit
AHU Air handling unit
4 Preparation
4.1 Preparing installation site
4.1.1 Installation site requirements of the
compressor unit
▪Service space. Mind the following requirements:
≥10
a
≥10
≥10≥500
≥10
(mm)
3D098835-1
b
aTop view
bFront view
NOTICE
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
4.2 Preparing refrigerant piping
4.2.1 Refrigerant piping requirements
NOTICE
Refrigerant R410A requires strict cautions for keeping the
system clean and dry. Foreign materials (including mineral
oils or moisture) should be prevented from getting mixed
into the system.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
4.2.2 Refrigerant piping material
▪Piping material: Phosphoric acid deoxidised seamless copper.
▪Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade Thickness (t)(a)
6.4mm (1/4")
9.5mm (3/8")
12.7mm (1/2")
Annealed (O) ≥0.80mm
t
Ø
15.9mm (5/8") Annealed (O) ≥0.99mm
19.1mm (3/4") Half hard (1/2H) ≥0.80mm
(a) Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.

4 Preparation
Installation and operation manual
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
4.2.3 To select the piping size
Determine the proper size referring to following tables and reference
figure (only for indication).
A
a
B
D
D
CD
D
bEKEXV
AHU
VRV DX
VRV DX
cc
aHeat exchanger unit
bCompressor unit
cRefrigerant branch kit
VRVDX VRVDX indoor unit
EKEXV Expansion valve kit
AHU Air handling unit
APiping between heat exchanger unit and compressor unit
BPiping between compressor unit and (first) refrigerant
branch kit (=main pipe)
CPiping between refrigerant branch kits
DPiping between refrigerant branch kit and indoor unit
In case the required pipe sizes (inch sizes) are not available, it is
also allowed to use other diameters (mm sizes), taken the following
into account:
▪ Select the pipe size nearest to the required size.
▪ Use the suitable adapters for the change-over from inch to mm
pipes (field supply).
▪ The additional refrigerant calculation has to be adjusted as
mentioned in "5.6.2 To determine the additional refrigerant
amount"on page12.
A: Piping between heat exchanger unit and
compressor unit
Use the following diameters:
Compressor unit
capacity type (HP)
Piping outer diameter size (mm)
Gas pipe Liquid pipe
5 19.1 12.7
B: Piping between compressor unit and (first)
refrigerant branch kit
If the equivalent pipe length between the heat exchanger unit and
the furthest indoor unit is 90 m or more, it is recommended to
increase the size (size-up) of the main gas pipe (between
compressor unit and first refrigerant branch kit). If the recommended
gas pipe (size-up) is not available, you must use the standard size
(which might result in a small capacity decrease).
Compressor unit
capacity type (HP)
Piping outer diameter size (mm)
Gas pipe Liquid pipe
Standard Size-up
5 15.9 19.1 9.5
C: Piping between refrigerant branch kits
Use the following diameters:
Indoor unit capacity
index
Piping outer diameter size (mm)
Gas pipe Liquid pipe
<150 15.9 9.5
D: Piping between refrigerant branch kit and
indoor unit
Use the same diameters as the connections (liquid, gas) on the
indoor units. The diameters of the indoor units are as follows:
Indoor unit capacity
index
Piping outer diameter size (mm)
Gas pipe Liquid pipe
15~50 12.7 6.4
63~140 15.9 9.5
4.2.4 To select refrigerant branch kits
For piping example, refer to "4.2.3 To select the piping size" on
page6.
Refnet joint
When using refnet joints, choose from the following table in
accordance with the capacity of the compressor unit. Example:
Refnet joint c.
Compressor unit capacity type
(HP)
Refrigerant branch kit
5 KHRQ22M20T
Refnet headers
When using refnet headers, choose from the following table in
accordance with the capacity of the compressor unit.
Compressor unit capacity type
(HP)
Refrigerant branch kit
5 KHRQ22M29H
INFORMATION
Maximum 8 branches can be connected to a header.
4.3 Preparing electrical wiring
4.3.1 Safety device requirements
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
Power supply: Compressor unit
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model Minimum circuit
ampacity
Recommended
fuses
RKXYQ5 13.5A 16A
▪ Phase and frequency: 3N~50Hz
▪ Voltage: 380-415V
Transmission wiring
Transmission line section:
Transmission wiring Sheathed + shielded cable (2
wires)
Vinyl cords
0.75~1.25mm²

5 Installation
Installation and operation manual
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RKXYQ5T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
Maximum wiring length
(= distance between compressor
unit and furthest indoor unit)
300m
Total wiring length
(= distance between compressor
unit and all indoor units, and
between compressor unit and
heat exchanger unit)
600m
If the total transmission wiring exceeds these limits, it may
result in communication error.
5 Installation
5.1 Opening the units
5.1.1 To open the compressor unit
DANGER: RISK OF BURNING
DANGER: RISK OF ELECTROCUTION
1Remove the service cover of the compressor unit.
2If you want to make field settings, remove the inspection cover.
3If you want to connect electrical wiring, remove the switch box
cover.
2
3
1
5× 4×
5.2 Mounting the compressor unit
5.2.1 Guidelines when installing the
compressor unit
Check the strength and level of the installation ground so that the
unit will not cause any operating vibration or noise. If the vibration
might be transmitted to the building, use a vibration-proof rubber
(field supply).
You can install the compressor unit directly on the floor or on a
structure.
▪On the floor. You do NOT have to fix the unit with anchor bolts.
▪On a structure. Fix the unit securely with anchor bolts, nuts and
washers (field supply) to the structure. The foundation (steel beam
frame or concrete) must be larger than the grey marked area.
a
≤
480
516
≥666
426
≥640
(mm)
Minimum foundation
aAnchor point (4×)
INFORMATION
The recommended height of the upper protruding part of
the bolts is 20mm.
20 mm
5.3 Connecting the refrigerant piping
DANGER: RISK OF BURNING
5.3.1 Using the stop valve and service port
To handle the stop valve
▪ Make sure to keep all stop valves open during operation.
▪ The stop valve is factory closed.
To open the stop valve
1Remove the stop valve cover.
2Insert a hexagon wrench into the stop valve and turn the stop
valve counterclockwise.
3When the stop valve cannot be turned any further, stop turning.
Result: The valve is now open.
To fully open the Ø19.1 stop valve, turn the hexagonal wrench until a
torque between 27 and 33N•m is achieved.
Inadequate torque may cause leakage of refrigerant and breakage of
the stop valve cap.
1
23
4

5 Installation
Installation and operation manual
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
NOTICE
Pay attention that mentioned torque range is applicable for
opening Ø19.1mm stop valves only.
To close the stop valve
1Remove the stop valve cover.
2Insert a hexagon wrench into the stop valve and turn the stop
valve clockwise.
3When the stop valve cannot be turned any further, stop turning.
Result: The valve is now closed.
Closing direction:
To handle the stop valve cover
▪ The stop valve cover is sealed where indicated by the arrow. Take
care not to damage it.
▪ After handling the stop valve, make sure to tighten the stop valve
cover securely. For the tightening torque, refer to the table below.
▪ Check for refrigerant leaks after tightening the stop valve cover.
To handle the service port
▪ Always use a charge hose equipped with a valve depressor pin,
since the service port is a Schrader type valve.
▪ After handling the service port, make sure to tighten the service
port cover securely. For the tightening torque, refer to the table
below.
▪ Check for refrigerant leaks after tightening the service port cover.
Tightening torques
Stop valve
size (mm)
Tightening torque N•m (turn clockwise to close)
Shaft
Valve body Hexagonal
wrench
Cap (valve
lid)
Service
port
Ø9.5 5.4~6.6 4mm 13.5~16.5 11.5~13.9
Ø19.1 27.0~33.0 8mm 22.5~27.5
5.3.2 To remove the pinched pipes
WARNING
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
Failure to observe the instructions in procedure below
properly may result in property damage or personal injury,
which may be serious depending on the circumstances.
Use the following procedure to remove the pinched piping:
1Remove the valve cover and make sure that the stop valves are
fully closed.
c
d
a
b
aService port and service port cover
bStop valve
cField piping connection
dStop valve cover
2Connect the vacuuming/recovery unit through a manifold to the
service port of all stop valves.
You have to recover gas and oil from all 4 pinched pipes. Depending
on your available tools, use method 1 (manifold with refrigerant line
splitters required) or method 2.
Manifold Connections Compressor unit
p<p>
e
B
A
Method 1:
Connect to all service
ports at once.
C
a
b
A
c
d
B
C
C
C
D
D
cd
b
a
Method 2:
First connect to the
first 2 service ports.
C
C
bB aA
Then connect to the
last 2 service ports.
dB
c
A
C
C
a, b, c, d Service ports of stop valves
eVacuuming/recovery unit
A, B, C Valves A, B and C
DRefrigerant line splitter
3Recover gas and oil from the pinched piping by using a
recovery unit.
CAUTION
Do not vent gases into the atmosphere.
4When all gas and oil is recovered from the pinched piping,
disconnect the charge hose and close the service ports.
5Cut off the lower part of the gas and liquid stop valve pipes
along the black line. Use an appropriate tool (e.g. a pipe cutter,
a pair of nippers).

5 Installation
Installation and operation manual
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
WARNING
Never remove the pinched piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the pinched piping.
6Wait until all oil is dripped out before continuing with the
connection of the field piping in case the recovery was not
complete.
5.3.3 To connect the refrigerant piping to the
compressor unit
NOTICE
▪ Be sure to use the supplied accessory pipes when
carrying out piping work in the field.
▪ Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel.
1Remove the service cover. See "5.1.1To open the compressor
unit"on page7.
2Choose a piping route (a or b).
b
a
a
aTo the back
bTo the top
3If you have chosen the piping route to the top:
a b c d
aCut the insulation (under the knockout hole).
bHit on the knockout hole, and remove it.
cRemove the burrs.
dPaint the edges and areas around the edges using repair
paint to prevent rusting.
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
4Connect piping (by brazing) as follows:
a1
c1
c2
c3
a2
a3
b1
b2
b3
d3
d1
d2
aLiquid line (circuit 2: to indoor units)
bGas line (circuit 2: to indoor units)
cGas line (circuit 1: to heat exchanger unit)
dLiquid line (circuit 1: to heat exchanger unit)
1Pinched piping
2Piping accessory
3Field piping
5Reattach the service cover.
6Seal all gaps (example: a) to prevent small animals from
entering the system.
a
a
a
a
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.

5 Installation
Installation and operation manual
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RKXYQ5T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
5.4 Checking the refrigerant piping
5.4.1 About checking the refrigerant piping
Refrigerant piping works are
finished?
The indoor units, compressor
unit and/or heat exchanger
unit were already powered
ON?
Use procedure:
"Method 2: After power ON".
Finish piping work.
Use procedure:
"Method 1: Before power ON
(regular method)".
Yes
No
No
Yes
It is very important that all refrigerant piping work is done before the
units (compressor unit, heat exchanger unit or indoor units) are
powered on.
When the units are powered on, the expansion valves will initialise.
This means that they will close. Leak test and vacuum drying of field
piping, heat exchanger unit and indoor units is impossible when this
happens.
Therefore, there will be explained 2 methods for initial installation,
leak test and vacuum drying.
Method 1: Before power ON
If the system has not yet been powered on, no special action is
required to perform the leak test and the vacuum drying.
Method 2: After power ON
If the system has already been powered on, activate setting [2‑21]
(refer to "6.1.4 To access mode 1 or 2" on page 16). This setting
will open field expansion valves to guarantee a R410A piping
pathway and make it possible to perform the leak test and the
vacuum drying.
NOTICE
Make sure that the heat exchanger unit and all indoor units
connected to the compressor unit are powered on.
NOTICE
Wait until the compressor unit has finished the initialisation
to apply setting [2‑21].
Leak test and vacuum drying
Checking the refrigerant piping involves:
▪ Checking for any leakages in the refrigerant piping.
▪ Performing vacuum drying to remove all moisture, air or nitrogen
in the refrigerant piping.
If there is a possibility of moisture being present in the refrigerant
piping (for example, water may have entered the piping), first carry
out the vacuum drying procedure below until all moisture has been
removed.
All piping inside the unit has been factory tested for leaks.
Only field installed refrigerant piping needs to be checked.
Therefore, make sure that all the compressor unit stop valves are
firmly closed before performing leak test or vacuum drying.
NOTICE
Make sure that all (field supplied) field piping valves are
OPEN (not compressor unit stop valves!) before you start
leak test and vacuuming.
For more information on the state of the valves, refer to
"5.4.3Checking refrigerant piping: Setup"on page10.
5.4.2 Checking refrigerant piping: General
guidelines
Connect the vacuum pump through a manifold to the service port of
all stop valves to increase efficiency (refer to "5.4.3 Checking
refrigerant piping: Setup"on page10).
NOTICE
Use a 2-stage vacuum pump with a non-return valve or a
solenoid valve that can evacuate to a gauge pressure of
–⁠100.7kPa (5Torr absolute).
NOTICE
Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
NOTICE
Do not purge the air with refrigerants. Use a vacuum pump
to evacuate the installation.
5.4.3 Checking refrigerant piping: Setup
The system contains 2 refrigerant circuits:
▪Circuit 1: Compressor unit → Heat exchanger unit
▪Circuit 2: Compressor unit → Indoor units
You have to check both circuits (leak test, vacuuming drying). How
to check depends on your available tools:
If you have a
manifold…
Then
With refrigerant line
splitters
You can check both circuits at once. To do
so, connect the manifold via the splitters to
both circuits, and check.
Without refrigerant
line splitters
(takes twice as long)
You have to check the circuits separately. To
do so:
▪ First connect the manifold to circuit 1,
and check.
▪ Then connect the manifold to circuit 2,
and check.
Possible connections:
Manifold Connections Compressor unit
p<p>
R410AN2
b c e
ad
B
A
Circuit 1 and 2
together
C
g
h
A
f
i
B
C
C
C
D
D
hi
g
f
Only circuit 1
iB hA
C
C
Only circuit 2
C
C
fB gA

5 Installation
Installation and operation manual
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RKXYQ5T7Y1B
VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
aPressure reducing valve
bNitrogen
cWeighing scales
dRefrigerant R410A tank (siphon system)
eVacuum pump
fLiquid line stop valve (circuit 2: to indoor units)
gGas line stop valve (circuit 2: to indoor units)
hGas line stop valve (circuit 1: to heat exchanger unit)
iLiquid line stop valve (circuit 1: to heat exchanger unit)
A, B, C Valves A, B and C
DRefrigerant line splitter
Valve State of valve
Valves A, B and C Open
Liquid line and gas line stop
valves (f, g, h, i)
Close
NOTICE
The connections to the indoor units and to the heat
exchanger unit, and all indoor units and the heat
exchanger unit itself should also be leak and vacuum
tested. Keep any possible (field supplied) field piping
valves open as well.
Refer to the indoor unit installation manual for more details.
Leak test and vacuum drying should be done before the
power supply is set to the unit. If not, see also the flow
chart earlier described in this chapter (see "5.4.1 About
checking the refrigerant piping"on page10).
5.4.4 To perform a leak test
The leak test must satisfy the specifications of EN378‑2.
To check for leaks: Vacuum leak test
1Evacuate the system from the liquid and gas piping to
–⁠100.7kPa (–⁠1.007bar/5Torr) for more than 2 hours.
2Once reached, turn off the vacuum pump and check that the
pressure does not rise for at least 1 minute.
3Should the pressure rise, the system may either contain
moisture (see vacuum drying below) or have leaks.
To check for leaks: Pressure leak test
1Break the vacuum by pressurising with nitrogen gas to a
minimum gauge pressure of 0.2 MPa (2 bar). Never set the
gauge pressure higher than the maximum operation pressure of
the unit, i.e. 4.0MPa (40bar).
2Test for leaks by applying a bubble test solution to all piping
connections.
3Discharge all nitrogen gas.
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soap water, which may
cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
5.4.5 To perform vacuum drying
To remove all moisture from the system, proceed as follows:
1Evacuate the system for at least 2 hours to a target vacuum of
–⁠100.7kPa (–⁠1.007bar/5Torr).
2Check that, with the vacuum pump turned off, the target
vacuum is maintained for at least 1 hour.
3Should you fail to reach the target vacuum within 2 hours or
maintain the vacuum for 1 hour, the system may contain too
much moisture. In that case, break the vacuum by pressurising
with nitrogen gas to a gauge pressure of 0.05 MPa (0.5 bar)
and repeat steps 1 to 3 until all moisture has been removed.
4Depending on whether you want to immediately charge
refrigerant through the refrigerant charge port or first pre-charge
a portion of refrigerant through the liquid line, either open the
compressor unit stop valves, or keep them closed. See
"5.6.3To charge refrigerant"on page12 for more information.
5.5 To insulate the refrigerant piping
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
▪ Make sure to insulate the connection piping and refrigerant branch
kits entirely.
▪ Be sure to insulate the liquid and gas piping (for all units).
▪ Use heat resistant polyethylene foam which can withstand a
temperature of 70°C for liquid piping and polyethylene foam which
can withstand a temperature of 120°C for gas piping.
▪ Reinforce the insulation on the refrigerant piping according to the
installation environment.
Ambient
temperature
Humidity Minimum thickness
≤30°C 75% to 80% RH 15mm
>30°C ≥80% RH 20mm
Condensation might form on the surface of the insulation.
▪ If there is a possibility that condensation on the stop valve might
drip down into the indoor unit or into the heat exchanger unit
through gaps in the insulation and piping because the compressor
unit is located higher than the indoor unit or higher than the heat
exchanger unit, this must be prevented by sealing up the
connections. See below figure.
a
b
aInsulation material
bCaulking etc.
5.6 Charging refrigerant
5.6.1 Precautions when charging refrigerant
WARNING
▪ Only use R410A as refrigerant. Other substances may
cause explosions and accidents.
▪ R410A contains fluorinated greenhouse gases. Its
global warming potential value is 2087.5. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, always use protective
gloves and safety glasses.

5 Installation
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
NOTICE
If the power of some units is turned off, the charging
procedure cannot be finished properly.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
NOTICE
If operation is performed within 12 minutes after the
compressor unit, heat exchanger unit and indoor units are
turned on, the compressor will not operate before the
communication is established in a correct way between the
compressor unit, heat exchanger unit and indoor units.
NOTICE
Before starting charging procedures, check if the 7‑LEDs
display is as normal (see "6.1.4To access mode 1 or 2"on
page 16), and there is no malfunction code on the user
interface of the indoor unit. If a malfunction code is
present, see "8.1 Solving problems based on error
codes"on page22.
NOTICE
Make sure all connected units (heat exchanger unit +
indoor units) are recognised (setting [1‑5]).
5.6.2 To determine the additional refrigerant
amount
Additional refrigerant to be charged=R (kg). R should be rounded off
in units of 0.1 kg.
R=[(X1×Ø12.7)×0.12+(X2×Ø9.5)×0.059+(X3×Ø6.4)×0.022]×0.8+B
X1...3=Total length (m) of liquid piping size at Øa
Model B parameter (kg)
RKXYQ5 3.1
When using metric piping, please take into account following table
concerning the weight factor to be allocated. It should be substituted
in the formula for R.
Inch piping Metric piping
Size (Ø) (mm) Weight factor Size (Ø) (mm) Weight factor
6.4 0.022 6 0.018
9.5 0.059 10 0.065
12.7 0.12 12 0.097
5.6.3 To charge refrigerant
Charging refrigerant consists of 2 stages:
Stage Description
Stage 1: Pre-charging Recommended in case of larger systems.
Can be skipped, but charging will take longer
then.
Stage 2: Manual
charging
Only necessary if the determined additional
refrigerant amount is not reached yet by
pre-charging.
Stage 1: Pre-charging
Summary – Pre-charging:
Refrigerant bottle Connected to the service ports of the stop
valves. Which stop valves to use depends
on the circuits you choose to pre-charge to:
▪ Circuits 1 and 2 together (manifold with
refrigerant line splitters required).
▪ First circuit 1, then circuit 2 (or vice versa).
▪ Only circuit 1
▪ Only circuit 2
Stop valves Closed
Compressor Does NOT operate
1Connect as shown (choose one of the possible connections).
Make sure that all compressor unit stop valves, as well as valve
A are closed.
Possible connections:
Manifold Connections Compressor unit
p<p>
R410AN2
b c e
ad
B
A
Circuit 1 and 2
together
C
g
h
A
f
i
B
C
C
C
D
D
hi
g
f
Only circuit 1
iB hA
C
C
Only circuit 2
C
C
fB gA
aPressure reducing valve
bNitrogen
cWeighing scales
dRefrigerant R410A tank (siphon system)
eVacuum pump
fLiquid line stop valve (circuit 2: to indoor units)
gGas line stop valve (circuit 2: to indoor units)
hGas line stop valve (circuit 1: to heat exchanger unit)
iLiquid line stop valve (circuit 1: to heat exchanger unit)
A, B, C Valves A, B and C
DRefrigerant line splitter
2Open valves C (on line of B) and B.
3Pre‑charge refrigerant until the determined additional refrigerant
amount is reached or pre‑charging is not possible anymore, and
then close valves C and B.
4Do one of the following:
If Then
The determined additional
refrigerant amount is reached
Disconnect the manifold from
the liquid line(s).
You do not have to perform the
"Stage 2" instructions.
Too much refrigerant is
charged
Recover refrigerant until the
determined additional
refrigerant is reached.
Disconnect the manifold from
the liquid line(s).
You do not have to perform the
"Stage 2" instructions.
The determined additional
refrigerant amount is not
reached yet
Disconnect the manifold from
the liquid line(s).
Continue with the "Stage 2"
instructions.

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Stage 2: Manual charging
(= charging in the "Manual additional refrigerant charge" mode)
Summary – Manual charging:
Refrigerant bottle Connected to the service port for refrigerant
charge.
This charges to both circuits, and to the
compressor unit's internal refrigerant piping.
Stop valves Open
Compressor Operates
5Connect as shown. Make sure valve A is closed.
p<p>
R410A
a c
b
A
e
d
aWeighing scales
bRefrigerant R410A tank (siphon system)
cVacuum pump
dRefrigerant charge port
eHeat exchanger unit
AValve A
NOTICE
The refrigerant charging port is connected to the piping
inside the unit. The unit's internal piping is already factory
charged with refrigerant, so be careful when connecting
the charge hose.
6Open all compressor unit stop valves. At this point, valve A
must remain closed!
7Take all the precautions mentioned in "6 Configuration" on
page15 and "7Commissioning"on page20 into account.
8Turn on the power of the indoor units, compressor unit and heat
exchanger unit.
9Activate setting [2‑20] to start the manual additional refrigerant
charge mode. For details, see "6.1.8Mode 2: Field settings"on
page18.
Result: The unit will start operation.
INFORMATION
The manual refrigerant charge operation will automatically
stop within 30 minutes. If charging is not completed after
30 minutes, perform the additional refrigerant charging
operation again.
INFORMATION
▪ When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction code
will be displayed. In that case, refer to "5.6.4 Error
codes when charging refrigerant" on page 13 and
solve the malfunction accordingly. Resetting the
malfunction can be done by pushing BS3. You can
restart the "Charging" instructions.
▪ Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
10 Open valve A.
11 Charge refrigerant until the remaining determined additional
refrigerant amount is added, and then close valve A.
12 Press BS3 to stop the manual additional refrigerant charge
mode.
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
NOTICE
After adding the refrigerant, do not forget to close the lid of
the refrigerant charging port. The tightening torque for the
lid is 11.5 to 13.9N•m.
5.6.4 Error codes when charging refrigerant
INFORMATION
If a malfunction occurs, the error code is displayed on the
user interface of the indoor unit.
If a malfunction occurs, close valve A immediately. Confirm the
malfunction code and take corresponding action, "8.1 Solving
problems based on error codes"on page22.
5.6.5 To fix the fluorinated greenhouse gases
label
1Fill in the label as follows:
d
c
b
a
aFrom the multilingual fluorinated greenhouse gases label
peal off the applicable language and stick it on top of a.
bFactory refrigerant charge: see unit name plate
cAdditional refrigerant amount charged
dTotal refrigerant charge
2Fix the label on the inside of the compressor unit. There is a
dedicated place for it on the wiring diagram label.
5.7 Connecting the electrical wiring
5.7.1 Field wiring: Overview
Field wiring consists of:
▪ Power supply (always including earth)
▪ Communication (= transmission) wiring between the compressor
unit, the heat exchanger unit, and the indoor units.
Example:
g
f
F1/F2
(16 V)
F1/F2
(16 V)
220-240 V
1~ 50 Hz
e
c
a
d
b
220-240 V
1~ 50 Hz
380-415 V
3N~ 50 Hz
aMain switch

5 Installation
Installation and operation manual
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
bEarth connection
cPower supply wiring (including earth) (sheathed cable)
F1/F2 Transmission wiring (sheathed + shielded cable)
dCompressor unit
eHeat exchanger unit
fIndoor unit
gUser interface
Branches
No branching is allowed after branching.
D
B
C
b2
b3
c1
c2
b1
a
A
ACentral user interface (etc...)
BCompressor unit
CIndoor unit
DHeat exchanger unit
aMain line. The main line is the line to which the
transmission wiring of the heat exchanger unit is
connected.
b1, b2, b3 Branch lines
c1, c2 No branch is allowed after branch
5.7.2 Guidelines when connecting the electrical
wiring
Tightening torques
Wiring Screw size Tightening torque
(N•m)
Power supply wiring
(power supply +
shielded ground)
M5 2.0~3.0
Transmission wiring M3.5 0.8~0.97
5.7.3 To connect the electrical wiring on the
compressor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located on the switch box cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1Remove the service covers of the compressor unit and the
switch box.
2Connect the transmission wiring as follows:
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
d
X2MX2M
TO OUT/DTO IN/D
F1 F2 F1 F2
ba
c
aCompressor unit
bHeat exchanger unit
cSheathed + shielded cable (2 wires) (no polarity)
dTerminal board (field supply)
WARNING
You must use shielded wire and connect the earth to the
transmission terminal.
X2M
F1 F2
a
a Earth (use the screw delivered as accessory)
3Connect the power supply as follows:
3N~ 50 Hz
380-415 V
L1 L2 L3
L1 L2 L3
NX1M
a
b
c
aEarth leakage circuit breaker
bFuse
cPower supply cable
4Route the wiring through the frame, and fix the cables (power
supply and transmission wiring) with cable ties.
INFORMATION
To make routing the wiring easier, you can turn the switch
box horizontally by loosening the screw on the left side of
the switch box.
1×

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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
X1M X2M
c
c
b
a
≥50 mm
ba
X2M
b a
X1M
L1
F1 F2
L2 L3 N
c c
aTransmission wiring
bPower supply
cCable tie
5Reattach the service covers.
6Connect an earth leakage circuit breaker and fuse to the power
supply line.
5.8 Finishing the compressor unit
installation
5.8.1 To finish the transmission wiring
After installing the transmission wires inside the unit, wrap them
along with the on-site refrigerant pipes using finishing tape, as
shown in figure below.
a bc de
aLiquid pipe
bGas pipe
cInsulator
dTransmission wiring (F1/F2)
eFinishing tape
6 Configuration
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: RISK OF ELECTROCUTION
6.1 Making field settings
6.1.1 About making field settings
To configure the heat pump system, you must give input to the
compressor unit's main PCB (A1P). This involves the following field
setting components:
▪ Push buttons to give input to the PCB
▪ A display to read feedback from the PCB
▪ DIP switches (only change the factory settings if you install a cool/
heat selector switch).
Field settings are defined by their mode, setting and value. Example:
[2‑8]=4.
PC configurator
You can also make field settings through a personal computer
interface (for this, option EKPCCAB is required). The installer can
prepare the configuration (off-site) on PC and afterwards upload the
configuration to the system.
See also: "6.1.9To connect the PC configurator to the compressor
unit"on page20.
Mode 1 and 2
Mode Description
Mode 1
(monitoring
settings)
Mode1 can be used to monitor the current
situation of the compressor unit. Some field
setting contents can be monitored as well.
Mode 2
(field settings)
Mode2 is used to change the field settings of
the system. Consulting the current field setting
value and changing the current field setting
value is possible.
In general, normal operation can be resumed
without special intervention after changing field
settings.
Some field settings are used for special
operation (e.g., 1 time operation, recovery/
vacuuming setting, manual adding refrigerant
setting, etc.). In such a case, it is required to
abort the special operation before normal
operation can restart. It will be indicated in
below explanations.
6.1.2 To access the field setting components
See "5.1.1To open the compressor unit"on page7.
6.1.3 Field setting components
The components to make field settings are as follows:
A1P
A2P
X1M X2M
BS2
SET
BS1
MODE
BS3
RETURN
BS4
TEST
BS5
RESET
H1P H2P H3P H4P H5P H6P H7P H8P
1 2
OFF
ON
DS1
MULTIDEMANDL.N.O.P.SLAVEMASTERIND
TEST/
HWL
MODE
DS1 DIP switches
BS1~BS5 Push buttons
H1P~H7P 7‑LEDs display
H8P LED for indication during initialisation
ON ( ) OFF ( ) Flashing ( )

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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
DIP switches
Only change the factory settings if you install a cool/heat selector
switch.
DS1‑1 COOL/HEAT selector (refer to the manual of the
cool/heat selector switch). OFF=not
installed=factory setting
DS1‑2 NOT USED. DO NOT CHANGE THE FACTORY
SETTING.
Push buttons
Use the push buttons to make the field settings. Operate the push
buttons with an insulated stick (such as a closed ball-point pen) to
avoid touching of live parts.
BS1 MODE: For changing the set mode
BS2 SET: For field setting
BS3 RETURN: For field setting
BS4 TEST: For test operation
BS5 RESET: For resetting the address when the wiring is
changed or when an additional indoor unit is installed
7‑LEDs display
The display gives feedback about the field settings, which are
defined as [Mode-Setting]=Value.
H1P Shows the mode
H2P~H7P Shows the settings and values, represented in binary code
H8P NOT used for field settings, but used during initialisation
Example:
H1P H2P H3P H4P H5P H6P H7P
- + + + + +
[H1P 32 16 8 4 2 1]
Description
(H1P OFF)
Default situation
(H1P flashing)
Mode 1
(H1P ON)
Mode 2
+ + + + +0 0 8 0 0 0
(H2P~H7P = binary 8)
Setting 8
(in mode 2)
+ + + + +0 0 0 4 0 0
(H2P~H7P = binary 4)
Value 4
(in mode 2)
6.1.4 To access mode 1 or 2
After the units are turned ON, the display goes to its default
situation. From there, you can access mode1 and mode2.
Initialisation: default situation
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
Turn on the power supply of the compressor unit, heat exchanger
unit, and all indoor units. When the communication between the
compressor unit, heat exchanger unit, and indoor units is established
and normal, the display indication state will be as below (default
situation when shipped from factory).
10~12 min
b
c
a
aPower ON
bDefault situation
cLED indication when there is a malfunction
If the default situation is not displayed after 10~12 minutes, check
the malfunction code on the indoor unit user interface. Solve the
malfunction code accordingly. First, check the communication wiring.
Switching between modes
Use BS1 to switch between the default situation, mode 1 and
mode2.
BS1 [5 s]
BS1
BS1
BS1
a
cb
aDefault situation (H1P OFF)
bMode 1 (H1P flashing)
cMode 2 (H1P ON)
BS1 Press BS1.
BS1 [5 s] Press BS1 for at least 5s.
INFORMATION
If you get confused in the middle of the process, press BS1
to return to the default situation.
6.1.5 To use mode 1 (and default situation)
In mode 1 (and in default situation) you can read out some
information.
Example: 7‑LEDs display – Default situation
You can read out the status of low noise operation as follows:
# Action Button/display
1 Make sure the LEDs are
showing the default situation.
(H1P OFF)
2 Check the status of LED
H6P. H6P OFF: Unit is currently
not operating under low noise
restrictions.
H6P ON: Unit is currently
operating under low noise
restrictions.
Example: 7‑LEDs display – Mode1
You can read out setting [1‑5] (=the total number of connected units
(heat exchanger unit + indoor units)) as follows:
# Action Button/display
1 Start from the default
situation.

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4P408443-1 – 2015.07
# Action Button/display
2 Select mode 1.
BS1 [1×]
3 Select setting 5.
("X×" depends on the setting
that you want to select.)
BS2 [X×]
(= binary 5)
4 Display the value of setting 5.
(there are 8 units connected)
BS3 [1×]
(= binary 8)
5 Quit mode 1.
BS1 [1×]
6.1.6 To use mode 2
In mode 2 you can make field settings to configure the system.
Example: 7‑LEDs display – Mode 2
You can change the value of setting [2‑8] (=Te target temperature
during cooling operation) to 4 (=8°C) as follows:
# Action Button/display
1 Start from the default
situation.
2 Select mode 2.
BS1 [5 s]
3 Select setting 8.
("X×" depends on the setting
that you want to select.)
BS2 [X×]
(= binary 8)
4 Select value 4 (= 8°C).
a: Display the current value.
b: Change to 4. ("X×"
depends on the current
value, and the value that you
want to select.)
c: Enter the value in the
system.
d: Confirm. The system starts
operating according to the
setting.
BS2 [X×]b
a
BS3 [1×]c
BS3 [1×]d
BS3 [1×]
5 Quit mode 2.
BS1 [1×]
6.1.7 Mode 1 (and default situation): Monitoring
settings
In mode 1 (and in default situation) you can read out some
information.
7‑LEDs display – Default situation (H1P OFF)
You can read out the following information:
Value / Description
H6P Shows the status of low noise operation.
OFF
Unit is currently not operating under low noise
restrictions.
ON
Unit is currently operating under low noise
restrictions.
Low noise operation reduces the sound generated by the
unit compared to nominal operating conditions.
Low noise operation can be set in mode2. There are two
methods to activate low noise operation of the compressor
unit and heat exchanger unit.
▪ The first method is to enable an automatic low noise
operation during night time by field setting. The unit will
operate at the selected low noise level during the
selected time frames.
▪ The second method is to enable low noise operation
based on an external input. For this operation an optional
accessory is required.
H7P Shows the status of power consumption limitation operation.
OFF
Unit is currently not operating under power
consumption limitations.
ON
Unit is currently operating under power consumption
limitation.
Power consumption limitation reduces the power
consumption of the unit compared to nominal operating
conditions.
Power consumption limitation can be set in mode2. There
are two methods to activate power consumption limitation of
the compressor unit.
▪ The first method is to enable a forced power consumption
limitation by field setting. The unit will always operate at
the selected power consumption limitation.
▪ The second method is to enable power consumption
limitation based on an external input. For this operation
an optional accessory is required.
7‑LEDs display – Mode1 (H1P flashing)
You can read out the following information:
Setting
()
Value / Description
[1‑5]
Shows the total number of
connected units (heat exchanger
unit + indoor units).
It can be convenient to check if
the total number of units which
are installed (heat exchanger unit
+ indoor units) match the total
number of units which are
recognised by the system. In
case there is a mismatch, it is
advised to check the
communication wiring path
between compressor unit and
heat exchanger unit, and
between compressor unit and
indoor units (F1/F2
communication line).

6 Configuration
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4P408443-1 – 2015.07
Setting
()
Value / Description
[1‑14]
Shows the latest malfunction
code.
When the latest malfunction
codes were reset by accident on
an indoor unit user interface, they
can be checked again through
this monitoring settings.
For the content or reason behind
the malfunction code see
"8.1Solving problems based on
error codes"on page22, where
most relevant malfunction codes
are explained. Detailed
information about malfunction
codes can be consulted in the
service manual of this unit.
To obtain more detailed
information about the malfunction
code, press BS2 up to 3 times.
[1‑15]
Shows the 2nd last malfunction
code.
[1‑16]
Shows the 3rd last malfunction
code.
6.1.8 Mode 2: Field settings
In mode 2 you can make field settings to configure the system. The LEDs give a binary representation of the setting/value number.
Setting
(= binary)
Value
Description
[2‑8]
Te target temperature during cooling operation. (default)
Auto
6°C
7°C
8°C
9°C
10°C
11°C
[2‑9]
Tc target temperature during heating operation. (default)
Auto
41°C
43°C
46°C
[2‑12]
Enable the low noise function and/or power consumption limitation
via external control adaptor (DTA104A61/62).
If the system needs to be running under low noise operation or
under power consumption limitation conditions when an external
signal is sent to the unit, this setting should be changed. This
setting will only be effective when the optional external control
adaptor (DTA104A61/62) is installed in the indoor unit.
(default)
Deactivated.
Activated.
[2‑15]
Fan static pressure setting (in heat exchanger unit).
You can set the external static pressure of the heat exchanger unit
according to the ducting requirements.
30Pa
(default)
60Pa
90Pa
120Pa
150Pa

6 Configuration
Installation and operation manual
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
Setting
(= binary)
Value
Description
[2‑20]
Manual additional refrigerant charge.
In order to add the additional refrigerant charge amount in a
manual way (without automatic refrigerant charging functionality),
following setting should be applied.
(default)
Deactivated.
Activated.
To stop the manual additional refrigerant
charge operation (when the required additional
refrigerant amount is charged), push BS3. If
this function was not aborted by pushing BS3,
the unit will stop its operation after 30minutes.
If 30minutes was not sufficient to add the
needed refrigerant amount, the function can be
reactivated by changing the field setting again.
[2‑21]
Refrigerant recovery/vacuuming mode.
In order to achieve a free pathway to reclaim refrigerant out of the
system or to remove residual substances or to vacuum the system
it is necessary to apply a setting which will open required valves in
the refrigerant circuit so the reclaim of refrigerant or vacuuming
process can be done properly.
(default)
Deactivated.
Activated.
To stop the refrigerant recovery/vacuuming
mode, push BS1. If BS1 is not pushed, the
system will remain in refrigerant recovery/
vacuuming mode.
[2‑22]
Automatic low noise setting and level during night time.
By changing this setting, you activate the automatic low noise
operation function of the unit and define the level of operation.
Depending on the chosen level, the noise level will be lowered.
The start and stop moments for this function are defined under
setting [2‑26] and [2‑27].
(default)
Deactivated
Level 1 Level 3<Level 2<Level 1
Level 2
Level 3
[2‑25]
Low noise operation level via the external control adaptor.
If the system needs to be running under low noise operation
conditions when an external signal is sent to the unit, this setting
defines the level of low noise that will be applied.
This setting will only be effective when the optional external control
adaptor (DTA104A61/62) is installed and the setting [2‑12] was
activated.
Level 1 Level 3<Level 2<Level 1
(default)
Level 2
Level 3
[2‑26]
Low noise operation start time.
This setting is used in conjunction with setting [2‑22].
20h00
(default)
22h00
24h00
[2‑27]
Low noise operation stop time.
This setting is used in conjunction with setting [2‑22].
6h00
7h00
(default)
8h00
[2‑30]
Power consumption limitation level (step1) via the external control
adaptor (DTA104A61/62).
If the system needs to be running under power consumption
limitation conditions when an external signal is sent to the unit, this
setting defines the level power consumption limitation that will be
applied for step1. The level is according to the table.
60%
(default)
70%
80%
[2‑31]
Power consumption limitation level (step2) via the external control
adaptor (DTA104A61/62).
If the system needs to be running under power consumption
limitation conditions when an external signal is sent to the unit, this
setting defines the level power consumption limitation that will be
applied for step2. The level is according to the table.
30%
(default)
40%
50%

7 Commissioning
Installation and operation manual
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VRV IV compressor unit for indoor installation
4P408443-1 – 2015.07
Setting
(= binary)
Value
Description
[2‑32]
Forced, all time, power consumption limitation operation (no
external control adaptor is required to perform power consumption
limitation).
If the system always needs to be running under power
consumption limitation conditions, this setting activates and defines
the level power consumption limitation that will be applied
continuously. The level is according to the table.
(default)
Function not active.
Follows [2‑30] setting.
Follows [2‑31] setting.
[2‑41]
Cooling comfort setting.
This setting is used in conjunction with setting [2‑8].
Eco
(default)
Mild
Quick
Powerful
[2‑42]
Heating comfort setting.
This setting is used in conjunction with setting [2‑9].
Eco
(default)
Mild
Quick
Powerful
6.1.9 To connect the PC configurator to the
compressor unit
ab
X41A
A1P
2
345
HJST
aPC
bCable (EKPCCAB)
X41A Connector
A1P Compressor unit main PCB
7 Commissioning
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run must be
performed according to the procedures described below.
7.1 Precautions when commissioning
CAUTION
Do not perform the test operation while working on the
indoor units or the heat exchanger unit.
When performing the test operation, not only the
compressor unit will operate, but the heat exchanger unit
and the connected indoor units as well. Working on an
indoor unit or the heat exchanger unit while performing a
test operation is dangerous.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
During test operation, the compressor unit, the heat exchanger unit
and the indoor units will start up. Make sure that the preparations of
the heat exchanger unit and all the indoor units are finished (field
piping, electrical wiring, air purge, ...). See installation manual of the
indoor units for details.
7.2 Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit must be closed, only then can
the unit be powered up.
You read the complete installation and operation
instructions, as described in the installer and user
reference guide.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
"5.7 Connecting the electrical wiring" on page 13,
according to the wiring diagrams and according to the
applicable legislation.
Power supply voltage
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
Earth wiring
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500VDC between power terminals and earth.
Never use the megatester for the transmission wiring.