Daikin HXY080A7V1B user guide manual

INSTALLATION AND

OPERATION MANUAL

HXY080A7V1B
HXY125A7V1B

System indoor unit

Daikin Europe N.V.

CE - DECLARATION-OF-CONFORMITY

CE - KONFORMITÄTSERKLÄRUNG

CE - DECLARATION-DE-CONFORMITE

CE - CONFORMITEITSVERKLARING

CE - DECLARACION-DE-CONFORMIDAD

CE - DICHIARAZIONE-DI-CONFORMITA

CE - ∆HΛΩΣΗ ΣΥΜΜΟΡΦΩΣΗΣ

CE - DECLARAÇÃO-DE-CONFORMIDADE

CE - ЗАЯВЛЕНИЕ-О-СООТВЕТСТВИИ

CE - OVERENSSTEMMELSESERKLÆRING

CE - FÖRSÄKRAN-OM-ÖVERENSTÄMMELSE

CE - ERKLÆRING OM-SAMSVAR

CE - ILMOITUS-YHDENMUKAISUUDESTA

CE - PROHLÁŠENÍ-O-SHODĚ

CE - IZJAVA-O-USKLAĐENOSTI

CE - MEGFELELŐSÉGI-NYILATKOZAT

CE - DEKLARACJA-ZGODNOŚCI

CE - DECLARAŢIE-DE-CONFORMITATE

CE - IZJAVA O SKLADNOSTI

CE - VASTAVUSDEKLARATSIOON

CE - ДЕКЛАРАЦИЯ-ЗА-ϹЪОТВЕТСТВИЕ

CE - ATITIKTIES-DEKLARACIJA

CE - ATBILSTĪBAS-DEKLARĀCIJA

CE - VYHLÁSENIE-ZHODY

CE - UYUMLULUK-BİLDİRİSİ

01

are in conformity with the following standard(s) or other normative document(s), provided that these are used in accordance with our

instructions:

02

der/den folgenden Norm(en) oder einem anderen Normdokument oder -dokumenten entspricht/entsprechen, unter der Voraussetzung,

daß sie gemäß unseren Anweisungen eingesetzt werden:03sont conformes à la/aux norme(s) ou autre(s) document(s) normatif(s), pour autant qu'ils soient utilisés conformément à nos instructions:04conform de volgende norm(en) of één of meer andere bindende documenten zjn, op voorwaarde dat ze worden gebru kt overeenkomstig

onze nstructies:05están en conformidad con la(s) siguiente(s) norma(s) u otro(s) documento(s) normativo(s), siempre que sean ut lizados de acuerdo con

nuestras instrucciones:06sono conformi al(i) seguente(i) standard(s) o altro(i) documento(i) a carattere normativo, a patto che vengano usati in conformità a le

nostre istruzioni:07είναι σύμφωνα με το(α) ακόλουθο(α) πρότυπο(α) ή άλλο έγγραφο(α) κανονι σμών, υπό την προϋπόθεση ότι χρησιμοποιούνται σύμφωνα

με τ ς οδηγίες μας:

08

estão em conform dade 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:09соответствуют следующим стандартам или другим нормативным документам, при условии их использования согласно нашим

инструкциям:10overholder følgende standard(er) eller andet/andre retningsgivende dokument(er), forudsat at disse anvendes i henhold t l vore

instrukser:11respektive utrustning är utförd i överensstämmelse med och följer följande standard(er) eller andra normgivande dokument, under

förutsättning att användning sker i överensstämmelse med våra instruktoner:

12

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:13vastaavat seuraavien standardien ja muiden ohjeellisten dokumenttien vaatimuksia edellyttäen, että niitä käytetään ohjeidemme

mukaisesti:14za předpokladu, že jsou využívány v souladu s našmi pokyny, odpovídají následujícím normám nebo normativním dokumentům:15u skladu sa slijedećim standardom(ima) ili drugim normativnim dokumentom(ima), uz uvjet da se oni koriste u skladu s našim uputama:

16

megfelelnek az a ábbi szabvány(ok)nak vagy egyéb irányadó dokumentum(ok)nak, ha azokat előírás szerint használják:17spełniają wymogi następujących norm i nnych dokumentów normalizacyjnych, pod warunkiem że używane są zgodnie z naszymi

instrukcjami:

18

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:

19

skladni z naslednjimi standardi in drugimi normativi, pod pogojem, da se uporabljajo v skladu z našimi navodili:20on vastavuses järgmis(t)e standardi(te)ga või teiste normatiivsete dokumentidega, kui neid kasutatakse vastavalt me e juhend tele:21съответстват на следните стандарти или други нормативни документи, при условие, че се използват съгласно нашите

инструкции:

22

atitinka žemiau nurodytus standartus ir (arba) kitus norminius dokumentus su sąlyga, kad yra naudojami pagal mūsų nurodymus:23tad, ja lietoti atbilstoši ražotāja norādījumiem, atbilst sekojošiem standartiem un citiem normatīviem dokumentiem:24sú v zhode s nasledovnou(ými) normou(ami) alebo iným(i) normatívnym( ) dokumentom(am ), za predpokladu, že sa používajú v súlade

s našim návodom:25ürünün, talimatlarımıza göre kullanılması koşuluyla aşağıdaki standartlar ve norm belirten belgelerle uyumludur:

01

Directives, as amended.02Direktiven, gemäß Änderung.

03

Directives, telles que modifiées.04Richtlijnen, zoals geamendeerd.05Directivas, según lo enmendado.06Direttive, come da modifica.07Οδηγιών, όπως έχουν τροποποιηθεί.08Directivas, conforme alteração em.09Директив со всеми поправками.

10

Direktiver, med senere ændringer.11Direktiv, med företagna ändringar.12Direktiver, med foretatte endringer.13Direktiivej ä, sellaisina ku n ne ovat muutettuina.14v platném znění.15Smjernice, kako je izmijenjeno.16irányelv(ek) és módosításaik rendelkezéseit

.

17

z późniejszymi poprawkami.18Directivelor, cu amendamentele respective.

19

D rektive z vsemi spremembami.20D rektiivid koos muudatustega.21Директиви, с техните изменения.22D rektyvose su papildymais.23D rektīvās un to papildinājumos.24Smernice, v platnom znení.25Deǧiştirilmiş halleriyle Yönetmelikler.

01

following the provis ons of:02gemäß den Vorschriften der:03conformément aux stipulations des:04overeenkomstig de bepalingen van:05siguiendo las disposiciones de:06secondo le prescrizioni per:07με τήρηση των διατάξεων των:08de acordo com o previsto em:09в соответствии с положениями:

10

under iagttagelse af bestemmelserne i:11enligt villkoren i:12gitt i henhold til bestemmelsene i:13noudattaen määräyks ä:14za dodržení ustanovení předpisu:15prema odredbama:16követi a(z):17zgodn e z postanow eniami Dyrektyw:18în urma prevederilor:

19

ob upoštevanju določb:20vastavalt nõuetele:21следвайки клаузите на:22la kantis nuostatų, pateik amų:

23

evērojot prasības, kas noteiktas:

24

održiavajúc ustanovenia:25bunun koşullarına uygun olarak:

01 Note *

as set out in

<A>

and judged positively by

<B>

according to the

Certificate <C>

.

02 Hinweis *

wie in

<A>

aufgeführt und von

<B>

positiv beurtei t

gemäß

Zertifikat <C>

.

03 Remarque *

tel que défini dans

<A>

et évalué positivement par

<B>

conformément au

Certificat <C>

.

04 Bemerk *

zoals vermeld in

<A>

en pos tief beoordeeld door

<B>

overeenkomstig

Certificaat <C>

.

05 Nota *

como se establece en

<A>

y es valorado

positivamente por

<B>

de acuerdo con el

Certificado <C>

.

06 Nota *

delineato nel

<A>

e giudicato pos tivamente

da

<B>

secondo il

Certificato <C>

.

07 Σημείωση *

όπως καθορίζεται στο

<A>

και κρίνεται θετικά από

το

<B>

σύμφωνα με το

Πιστοποιητικό <C>

.

08 Nota *

tal como estabelec do em

<A>

e com o parecer

positivo de

<B>

de acordo com o

Certificado <C>

.

09 Примечание *

как указано в

<A>

и в соответствии

с полож ительным решением

<B>

согласно

Свидетельству <C>

.

10 Bemærk *

som anført i

<A>

og pos tivt vurderet af

<B>

i henhold til

Certifikat <C>

.

11 Information *

enligt

<A>

och godkänts av

<B>

enligt

Certifikatet <C>

.

12 Merk *

som det fremkommer i

<A>

og gjennom pos tiv

bedømmelse av

<B>

ifølge

Sertifikat <C>

.

13 Huom *

jotka on esitetty asiakirjassa

<A>

ja jotka

<B>

on

hyväksynyt

Sertifikaatin <C>

mukaisesti.

14 Poznámka *

jak bylo uvedeno v

<A>

a pozitivně zjištěno

<B>

v souladu s

osvědčením <C>

.

15 Napomena *

kako je izloženo u

<A>

i pozitivno ocijenjeno

od strane

<B>

prema

Certifikatu <C>

.

16 Megjegyzés *

a(z)

<A>

alapján, a(z)

<B>

igazolta a megfelelést,

a(z)

<C> tanúsítvány

szer nt.

17 Uwaga *

zgodnie z dokumentac ą

<A>

, pozytywną opinią

<B>

i

Świadectwem <C>

.

18 Notă *

aşa cum este stabilit în

<A>

şi apreciat pozitiv

de

<B>

în conformitate cu

Certificatul <C>

.

19 Opomba *

kot je določeno v

<A>

n odobreno s strani

<B>

v skladu s

certifikatom <C>

.

20 Märkus *

nagu on näidatud dokumendis

<A>

ja heaks

kiidetud

<B>

järgi vastavalt

sertifikaadile <C>

.

21 Забележка

* както е изложено в

<A>

и оценено положително

от

<B>

съгласно

Сертификата <C>

.

22 Pastaba *

kaip nustatyta

<A>

ir kaip teigiamai nuspręsta

<B>

pagal

Sertifikatą <C>

.

23 Piezīmes *

kā norādīts

<A>

un atbilstoši

<B>

pozitīvajam

vērtējumam saskaņā ar

sertifikātu <C>

.

24 Poznámka *

ako bolo uvedené v

<A>

a poz tívne zistené

<B>

vsúlade s

osvedčením <C>

.

25 Not * <A>

’da belirtildiği gibi ve

<C> Sertifikasına

göre

<B>

tarafından olumlu olarak değerlendir ldiği gibi.

<A> DAIKIN.TCF.025E11/07-2012

<B> DEKRA (NB0344)

<C> 2082543.0551-QUA/EMC

01

a

declares under its sole responsibil ty that the equipment to which this declaration relates:

02

d

erklärt auf seine alle nge Verantwortung daß d e Ausrüstung für die diese Erklärung bestimmt ist:

03

f

déclare sous sa seule responsabilité que l équipement visé par la présente déclaration:

04

l

verklaart hierbij op eigen exclus eve verantwoordel jkheid dat de apparatuur waarop deze verklaring betrekking heeft:

05

e

declara bajo su única responsabilidad que el equipo al que hace referencia la declaración:

06

i

dichiara sotto la propria responsabilità che gli apparecchi a cui è riferita questa dichiarazione:

07

g

δηλώνει με αποκλειστική της ευθύνη ότι ο εξοπλισμός στον οποίο αναφ έρεται η παρούσα δήλωση:

08

p

declara sob sua exclusiva responsabilidade que os equipamentos a que esta declaração se refere:

09

u

заявляет, исключительно под свою ответственность, что

оборудование,

к котором

у

относи тся настоящее заявление:

10

q

erklærer under eneansvarlig, at udstyret, som er omfattet af denne erklæring:

11

s

deklarerar i egenskap av huvudansvarig, att utrustningen som berörs av denna deklarat on innebär att:

12

n

erklærer et fu lstendig ansvar for at det utstyr som berøres av denne deklarasjon innebærer at:

13

j

ilmoittaa yksinomaan omalla vastuullaan, että tämän lmoituksen tarkoittamat laitteet:

14

c

prohlašuje ve své plné odpovědnosti, že zařízení, k němuž se toto prohlášení vztahuje:

15

y

izjavljuje pod isključivo vlastitom odgovornošću da oprema na koju se ova izjava odnosi:

16

h

teljes felelőssége tudatában kijelenti, hogy a berendezések, melyekre e nyilatkozat vonatkozik:

17

m

deklaruje na własną i wyłączną odpowiedzialność, że urządzenia, których ta deklaracja dotyczy:

18

r

declară pe proprie răspundere că ech pamentele la care se referă această declaraţie:

19

o

z vso odgovornostjo izjavlja, da je oprema naprav, na katero se izjava nanaša:

20

x

kinnitab oma täiel kul vastutusel, et käesoleva deklaratsiooni alla kuuluv varustus:

21

b

декларира на своя отговорност, че оборудването, за коeто се отнася тази декларация:

22

t

visiška savo atsakomybe skelbia, kad įranga, kuriai takoma ši deklaracija:

23

v

ar pilnu atb ldību apliecina, ka tālāk aprakstītās iekārtas, uz kurām attecas šī deklarācija:

24

k

vyhlasuje na vlastnú zodpovednosť, že zariadenie, na ktoré sa vzťahuje toto vyhlásenie:

25

w

tamamen kendi sorumluluǧunda olmak üzere bu bildir nin ilgili olduǧu donanımının aşaǧıdaki gibi olduǧunu beyan eder:

EN60335-2-40,

3P327592-1

Jean-Pierre Beuselinck

Director

Ostend, 3rd of September 2012

01 **

Daikin Europe N.V. is authorised to compile the Technical Construction File.

02 **

Daikin Europe N.V. hat die Berechtigung die Technische Konstruktionsakte zusammenzustellen.

03 **

Daikin Europe N.V. est autorisé à compiler le Dossier de Construction Technique.

04 **

Daikin Europe N.V. is bevoegd om het Technisch Constructiedossier samen te stellen.

05 **

Daikin Europe N.V. está autorizado a complar el Archivo de Construccón Técnica.

06 **

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Společnost Da kin Europe N.V. má oprávnění ke kompilaci souboru technické konstrukce.

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Daikin Europe N.V. Tekn k Yapı Dosyasını derlemeye yetkil dir.

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Electromagne ic Compatibility 2004/108/EC

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*

HXY080A7V1B, HXY125A7V1B,

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

1

Content Page

1. About the documentation...........................................................2

1.1. About this document ......................................................... 2

1.2. Scope of the manual ......................................................... 2

1.3. Documentation set ............................................................2

2. General safety precautions........................................................ 2

2.1. For the user.......................................................................2

2.2. For the installer ................................................................. 2

2.2.1. General................................................................... 2

2.2.2. Installation site........................................................ 3

2.2.3. Refrigerant .............................................................. 3

2.2.4. Water ...................................................................... 3

2.2.5. Electrical ................................................................. 3

2.2.6. Meaning of used items............................................ 4

3. About the box............................................................................. 4

3.1. Indoor unit ......................................................................... 4

3.1.1. To unpack the indoor unit........................................ 4

3.1.2. To remove the accessories from the indoor unit ..... 4

4. About the units and options .......................................................5

4.1. General information .......................................................... 5

4.1.1. Identification label: Indoor unit ................................ 5

4.2. Possible combinations of units and options ......................5

4.2.1. List of options for indoor unit................................... 5

4.2.2. Poss ble combinations of indoor unit

and outdoor unit......................................................6

5. Application guidelines ................................................................ 6

5.1. Overview: Application guidelines ...................................... 6

5.2. Setting up the space heating/cooling system....................6

5.3. Using an auxiliary heat source.......................................... 7

6. Preparation ................................................................................7

6.1. Preparing installation site.................................................. 7

6.1.1. Installation site requirements of the indoor unit ......7

6.2. Preparing water circuit ...................................................... 8

6.2.1. Selection of the type of heat emitters ..................... 8

6.2.2. Water circuit requirements......................................9

6.2.3. Formula to calculate the expansion vessel

pre-pressure ........................................................... 9

6.2.4. To check the water volume .....................................9

6.2.5. Changing the pre-pressure of the expansion

vessel.................................................................... 10

6.2.6. To check the water volume: Examples ................. 10

6.3. Preparing electrical wiring............................................... 11

6.3.1. About preparing electrical wiring........................... 11

6.3.2. Overview of electrical connections

on the indoor unit .................................................. 11

7. Installation................................................................................ 12

7.1. Mounting the indoor unit ................................................. 12

7.1.1. To install the indoor unit ........................................ 12

7.2. Connecting the water piping ........................................... 13

7.2.1. To connect the water piping .................................. 13

7.3. Connecting the electrical wiring ...................................... 14

7.3.1. Precautions on electrical wiring work.................... 14

7.4. Finishing the indoor unit installation ................................ 16

7.4.1. To fix the user interface cover to the indoor unit ... 16

7.4.2. To close the indoor unit.........................................16

8. Commissioning ........................................................................ 17

8.2. Final air purging .............................................................. 17

8.3. Field settings................................................................... 17

8.3.1. Procedure ............................................................. 17

8.3.2. Detailed description ..............................................18

8.4. Field setting list for Installation Manual ........................... 22

8.5. Final check and test run .................................................. 24

8.5.1. Final check............................................................ 24

8.5.2. System test run.....................................................24

8.5.3. Indoor unit individual test run................................24

8.6. Service and maintenance ............................................... 25

8.6.1. Maintenance activities .......................................... 25

8.6.2. Malfunction codes list ........................................... 25

8.6.3. Important information regarding

the refrigerant used............................................... 25

9. Installing the optional EKBUHAA(6V3/6W1) heater kit............26

10. Hand-over to the user .............................................................. 26

11. Operation of the unit ................................................................ 27

11.1. Introduction .....................................................................27

11.1.1. General information .............................................. 27

11.2. Quick start-up of the unit.................................................27

11.2.1. Space cooling/heating operation...........................27

11.3. Operating the unit ........................................................... 27

11.3.1. Operating the user interface ................................. 27

11.3.2. Name and function of buttons and icons...............28

11.3.3. Setting up the controller........................................ 29

11.3.4. Space cooling operation (c) ................................. 29

11.3.5. Space heating operation (h)................................. 29

11.3.6. Other operation modes.........................................31

11.3.7. Temperature read-out mode ................................. 31

11.3.8. Schedule timer operation ...................................... 32

11.3.9. Space heating ....................................................... 32

11.3.10. Programming and consulting the schedule timer..33

11.3.11. Operating the optional demand PCB .................... 37

11.3.12. Operating the optional user interface.................... 37

11.4. Field settings...................................................................37

11.4.1. Procedure ............................................................. 37

11.5. Field setting list for Operation Manual............................. 38

12. Maintenance ............................................................................ 40

12.1. Important information regarding the refrigerant used...... 40

12.2. Maintenance activities..................................................... 40

13. Troubleshooting ....................................................................... 40

13.1. Malfunction codes list...................................................... 40

14. Technical Data .........................................................................40

14.1. Piping diagram ................................................................ 40

14.2. Wiring diagram................................................................41

14.3. Electrical components box .............................................. 42

14.4. Operation range HXY(080/125) ......................................42

14.5. ESP curve ....................................................................... 42

14.6. Technical specifications table .......................................... 43

14.7. Electrical specifications table .......................................... 43

15. Disposal requirements ............................................................. 43

The English text is the original instruction. Other languages are
translations of the original instructions.

HXY080A7V1B
HXY125A7V1B

VRV IV System indoor unit

Installation and

operation manual

Installation and operation manual

2

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

1. About the documentation

1.1. About this document

This document is an installation manual. It is intended for authorized
installers of this product. It describes the procedures for installing,
commissioning and maintaining the unit, and it will provide help if
problems occur. Carefully read the relevant parts of the manual.

This document is also an operation manual. It is intended for the
installer and the user of this product. It descr bes how to operate and
maintain the unit, and it will provide help if problems occur. Carefully
read the relevant parts of the manual.

1.2. Scope of the manual

This manual does NOT include the selection procedure and the water
system design procedure. Only some precautions and tips and tricks
about the design of the water circuit are given in a separate chapter
of this manual.

Once the selection is done and the water system is designed, this
manual describes the procedures for handling, installing and
connecting the HXY080/125 units. This manual has been prepared to
ensure adequate maintenance of the unit, and it will provide help if
problems occur.

1.3. Documentation set

This document is part of a documentation set. The complete set
consists of:

Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your dealer.

2. General safety precautions

2.1. For the user

 If you are not sure how to operate the unit, contact your installer.
 The appliance is not intended for use by persons, including

children, with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance
by a person responsible for their safety. Children must be
supervised to ensure that they do not play with the product.

 Units are marked with the following symbol:

This means that electrical and electronic products may not be
mixed with unsorted household waste. Do NOT try to dismantle
the system yourself: the dismantling of the system, treatment of
the refrigerant, of oil and of other parts must be done by an
authorized installer and must comply with applicable legislation.
Units must be treated at a specialized treatment facility for
reuse, recycling and recovery. By ensuring this product is
disposed of correctly, you will help to prevent potential negative
consequences for the environment and human health. For more
information, contact your installer or local authority.

2.2. For the installer

2.2.1. General

If you are not sure how to install or operate the unit, contact your
dealer.

In accordance with the applicable legislation, it might be necessary to
provide a logbook with the product containing at least: information on
maintenance, repair work, results of tests, stand-by periods,…

Also, at least, following information must be provided at an
accessible place at the product:

 Instructions for shutting down the system in case of an

emergency.

 Name and address of fire department, police and hospital.
 Name, address and day and night telephone numbers for

obtaining service.

In Europe, EN378 provides the necessary guidance for this logbook.

Document Contains Format

Indoor unit
installation/opera ion
manual

Installation and
operator instructions

Indoor unit
installation/opera ion
manual

Outdoor unit installation
manual

See info delivered with
outdoor unit.

CAUTION

Do NOT rinse the unit. This may cause electric shocks or
fire.

NOTICE

 Do NOT place any objects or equipment on top of the

unit.

 Do NOT sit, climb or stand on the unit.

NOTICE

Improper installation or attachment of equipment or
accessories could result in electric shock, short-circuit,
leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or
approved by Daikin.

WARNING

Make sure installation, testing and applied materials
comply with applicable legislation (on top of the
instructions descr bed in the Daikin documentation).

CAUTION

Wear adequate personal protective equipment (protective
gloves, safety glasses,…) when installing, maintaining or
servicing the system.

DANGER: RISK OF BURNING

 Do NOT touch the refrigerant piping, water piping or

internal parts during and immediately after operation.
It could be too hot or too cold. Give it time to return to
normal temperature. If you must touch it, wear
protective gloves.

 Do NOT touch any accidental leaking refrigerant.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

3

2.2.2. Installation site

 Provide sufficient space around the unit for servicing and air

circulation.

 Make sure the installation site withstands the unit’s weight and

vibration.

 Make sure the area is well ventilated.
 Make sure the unit is level.

Do NOT install the unit in the following places:

 In potentially explosive atmospheres.
 In places where there is machinery that emits electromagnetic

waves. Electromagnetic waves may disturb the control system,
and cause malfunction of the equipment.

 In places where there is a risk of fire due to the leakage of

flammable gases (example: thinner or gasoline), carbon f bre,
ignitable dust.

 In places where corrosive gas (example: sulphurous acid gas) is

produced. Corrosion of copper pipes or soldered parts may
cause the refrigerant to leak.

2.2.3. Refrigerant

 Only use phosphoric acid deoxidised seamless copper with

annealed temper grade.

2.2.4. Water

2.2.5. Electrical

Install power cables at least 1 meter away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 meter may not be sufficient.

NOTICE

Make sure refrigerant piping installation complies with
applicable legislation. In Europe, EN378 is the applicable
standard.

NOTICE

Make sure the field piping and connections are not
subjected to stress.

WARNING

During tests, NEVER pressurize the product with a
pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).

WARNING

Take sufficient precautions in case of refrigerant leakage. If
refrigerant gas leaks, ventilate the area immediately.
Possible risks:

 Excessive refrigerant concentrations in a closed room

can lead to oxygen deficiency.

 Toxic gas may be produced if refrigerant gas comes

into contact with fire.

WARNING

Always recover the refrigerants. Do NOT release them
directly into the environment. Use a refrigerant reclaim unit
to evacuate the installation.

NOTICE

Make sure water quality complies with EU directive
98/83 EC.

DANGER: RISK OF ELECTROCUTION

 Turn OFF all power supply before removing the

switch box cover, connecting electrical wiring or
touching electrical parts.

 Disconnect the power supply for more than 1 minute,

and measure the voltage at the terminals of main
circuit capacitors or electrical components before
servicing. The voltage must be less than 50 V DC
before you can touch electrical components. For the
location of the terminals, see the wiring diagram.

 Do NOT touch electrical components with wet hands.
 Do NOT leave the unit unattended when the service

cover is removed.

WARNING

If not factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, shall be installed in the fixed wiring.

WARNING

 Only use copper wires.
 All field wiring must be performed in accordance with

the wiring diagram supplied with the product.

 NEVER squeeze bundled cables and make sure they

do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to
the terminal connections.

 Make sure to install earth wiring. Do NOT earth the

unit to a utility pipe, surge absorber, or telephone
earth. Incomplete earth may cause electrical shock.

 Make sure to use a dedicated power circuit. NEVER

use a power supply shared by another appliance.

 Make sure to install the required fuses or circuit

breakers.

 Make sure to install an earth leakage protector.

Failure to do so may cause electric shock or fire.

WARNING

 After finishing the electrical work, confirm that each

electrical component and terminal inside the electrical
components box is connected securely.

 Make sure all covers are closed before starting up the

unit.

Installation and operation manual

4

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

2.2.6. Meaning of used items

3. About the box

 At delivery, the unit must be checked for damage. Any damage

must be reported immediately to the carrier’s claims agent.

 Bring the packed unit as close as poss ble to its final installation

position to prevent damage during transport.

3.1. Indoor unit

3.1.1. To unpack the indoor unit

a Installation/operation manual

3.1.2. To remove the accessories from the indoor unit

The installation/operation manual indoor unit is located in the upper
part of the box. Follow the procedure below to remove the other
accessories.

1 Unfix front panel.
2 Tilt the bottom side of the front panel upwards and remove it.

Dealer:

Sales distributor for the product.

Authorized installer:

Technical skilled person who is qualified to install the product.

User:

Person who is owner of the product and/or operates the product.

Applicable legislation:

All international, European, national and local directives, laws,
regulations and/or codes that are relevant and applicable for a
certain product or domain.

Service company:

Qualified company which can perform or coordinate the required
service to the product.

Installation manual:

Instruction manual specified for a certain product or application,
explaining how to install, configure and maintain it.

Operation manual:

Instruction manual specified for a certain product or application,
explaining how to operate it.

Accessories:

Labels, manuals, information sheets and equipment that are
delivered with the product and that need to be installed
according to the instructions in the accompanying
documentation.

Optional equipment:

Equipment made or approved by Daikin that can be combined
with the product according to the instructions in the
accompanying documentation.

Field supply:

Equipment not made by Da kin that can be combined with the
product according to the instructions in the accompanying
documentation.

INFORMATION

Do NOT throw away the upper cardboard cover. On the
inside of the cardboard cover, the installation pattern is
printed.

WARNING

Tear apart and throw away plastic packaging bags so that
children will not play with them. Children playing with
plastic bags face danger of death by suffocation.

a

21

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

5

3 Remove the accessories.

a HXY(080/125) manual
b User interface kit: user interface, 4 fixing screws, 2 plugs
c Shut-off valve
d User interface cover
e 2 fixing screws front panel

f Bottomplate
g 4 fixing screws bottom plate
h Top pl a te

4. About the units and options

4.1. General information

This installation manual concerns VRV IV indoor unit air to water
inverter heat pump units of the Daikin HXY080/125 series.

These units are intended for indoor installation and aimed for
commercial and public buildings.

The unit is designed for wall mounted installation.

HXY080/125 units have a heating capacity of 9 kW/14 kW, cooling
capacity of 8.2 KW/12.5 kW.

The indoor units are designed to work at indoor ambient
temperatures from 5°C to 30°C.

During heating operation, the unit can heat up water to temperatures
of 25°C to 45°C, cooling operation of 5°C to 20°C.

The units are designed for indoor installation (outdoor temperatures:
cooling 10°C to 43°C, heating: -20°C to 24°C) (for details see
technical data book).

4.1. Identification

4.1.1. Identification label: Indoor unit

Location

Model identification

Modelname: HXY080A7V1B, HXY125A7V1B

4.2. Possible combinations of units and options

4.2.1. List of options for indoor unit

User interface (EKRUAHT)

The user interface is delivered as an accessory with the unit. An
additional user interface is optionally available.

The additional user interface can be connected to have both:

 Control close to the indoor unit.
 Room thermostat functionality in the principal space to be

heated.

Room thermostat (EKRTWA, EKRTR1)

You can connect an optional room thermostat to the indoor unit. This
thermostat can either be wired (EKRTWA) or wireless (EKRTR1).

For installation instructions, see the installation manual of the room
thermostat.

Remote sensor for wireless thermostat (EKRTETS)

You can use a wireless indoor temperature sensor (EKRTETS) only
in combination with the wireless thermostat (EKRTR1).

For installation intructions, see the installation manual of the room
thermostat.

Demand PCB (EKRP1AHTA)

An optional EKRP1AHTA demand PCB can be connected to the
indoor unit. This PCB is needed when an external room thermostat is
installed and provides the communication with the indoor unit.

Refer to the demand PCB installation manual for further details.

Refer to the wiring diagram or connection diagram for connecting this
PCB to the unit and "7.3.5. To connect the electrical wiring on the

indoor unit" on page 14.

Heat pump convector (FWXV)

An optional FWXV convector for heating/cooling operation can be
connected to this indoor unit.

Refer to the heat pump convector installation manual for further
details.

NOTICE

When installing or servicing several units at the same time,
make sure NOT to switch the service panels between
different models.

d

b
c

h

e

a

1x

bcd

2x 1x

g

4x

f

1x

e

1x

2x

3

Code Description

HHydro Box

X VRV connection

Y

Reversible applications (cooling + heating)

080 Capacity class (approx.):

 080 kW x 10 cooling capacity
 125 kW x 10 cooling capacity

A7 Series

V1 Voltage 1 P~, 220-240 V, 50 Hz

B European Market

NOTICE

An additional 230 V AC power supply is required for the
EKRTR1 room thermostat.

Installation and operation manual

6

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Drain pan kit (EKHBDPCA2)

The drain pan is required to drain accumulated condensation from
the indoor unit. It is required during low temperature cooling
operation of the indoor unit and when the leaving water temperature
is <18°C.

For installation of this option into the indoor unit, refer to the
installation manual delivered with this option kit.

Heater kit (EKBUH)

The heater kit option can be installed to assist the heat pump during
heating operation or to provide primary heating during emergency
situations

(1)

.

4.2.2. Possible combinations of indoor unit and outdoor unit

5. Application guidelines

5.1. Overview: Application guidelines

The purpose of the application guidelines is to give a glance of the
possibilities of the Daikin heat pump system.

This chapter contains applications guidelines for:

 Setting up the space heating/cooling system
 Setting up an auxiliary heat source for space heating

5.2. Setting up the space heating/cooling system

The Da kin heat pump system supplies leaving water to heat emitters
in one or more rooms.

Because the system offers a wide flexibility to control the temperature
in each room, you need to answer the following questions first:

 How many rooms are heated (or cooled) by the Daikin

heat pump system?

 Which heat emitter types are used in each room and what is

their design leaving water temperature?

Once the space heating/cooling requirements are clear, Daikin
recommends to follow the setup guidelines below.

5.2.1. Single room

Under floor heating or heat pump convector – Wired room
thermostat

Setup

A Main leaving water temperature zone
B One single room
C One single room
a Outdoor VRV IV heat pump
b VRV Direct Expansion (DX) Indoor unit cassette
c HXY(080/125)
d Optional EKRUAHT user interface (master)
e Refrigerant piping

f Water piping
g Floor heating loop
h Fan coil unit

i Bypass valve (field supply)

j User interface (slave)

 The under floor heating or heat pump connection is directly

connected to the indoor unit.

 The room temperature is controlled by the user interface, which

is used as room thermostat. Possible installations:

 User interface (standard equipment) installed in the room and

used as room thermostat

 User interface (standard equipment) installed at the indoor

unit and used for control close to the indoor unit + user
interface (optional equipment EKRUAHT) installed in the
room and used as room thermostat

Benefits

 Cost effective. You do NOT need an additional external room

thermostat.

 Highest comfort and efficiency. The smart room thermostat

functionality can decrease or increase the desired leaving water
temperature based on the actual room temperature
(modulation). This results in:

 Stable room temperature matching the desired temperature

(higher comfort)

 Less ON/OFF cycles (more quiet, higher comfort and higher

efficiency)

 Lowest possible leaving water temperature (higher efficiency)

 Easy. You can easily set the desired room temperature via the

user interface:

 For your daily needs, you can use preset values and

schedules.

 To deviate from your daily needs, you can temporarily

overrule the preset values and schedules.

(1) More information can be found in the manual of the heater kit and on page

"9. Installing the optional EKBUHAA(6V3/6W1) heater
kit" on page 26

of this manual.

Outdoor unit

Indoor unit RYYQ8~20 RYMQ RXYQ

HXY080A7V1B O X X

HXY125A7V1B O X X

O = allowed

X = not allowed

INFORMATION

For detailed information, refer to the VRV IV heat pump
combination table in Technical Data. Combinations are
explained depending on the system layout of the VRV IV
heat pump series.

NOTICE

 The illustrations in the application guidelines are

meant for reference only, and are NOT to be used as
detailed hydraulic diagrams. The detailed hydraulic
dimensioning and balancing are NOT shown, and are
the responsibility of the installer.

 For more information about the configuration settings

to optimize heat pump operation, see the
configuration chapter.

C

B

A

d

B

A

d

b

e

c

f f

ii

j

a

g

h

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

7

Under floor heating or heat pump convectors – External room
thermostat

Setup

A Main leaving water temperature zone
B One single room
C One single room

a Outdoor VRV IV heat pump
b VRV Direct Expansion (DX) Indoor unit cassette
c HXY(080/125)
d External room hermostat
e Refrigerant piping

f Water piping
g Floor hea ing loop
h Fan coil unit

i Bypass valve (field supply)

 The under floor heating or heat pump convectors are directly

connected to the indoor unit.

 The room temperature is controlled by the external room

thermostat (demand PCB is needed for this option).

5.3. Using an auxiliary heat source

a Outdoor VRV IV heat pump
b Floor hea ing loop (field supply)
c Collector (field supply)
d Auxiliary heat source (field supply)
e Shut-off valve

f Aquastat valve (field supply)
g Bypass valve (field supply)

 Make sure the return water to the heat pump does NOT exceed

45°C. To do so:

 Set the desired water temperature via the auxiliary boiler

controller to maximum 45°C.

 Install an aquastat valve in the return water flow of the

heat pump.

 Set the aquastat valve to close above 45°C and to open

below 45°C.

 Install non-return valves.
 Make sure to only have one expansion vessel in the water

circuit. An expansion vessel is already premounted in the indoor
unit.

Alternative option EKBUH can be considered. The heater kit option
will provide additional capacity in case of heat pump capacity
shortage. See "9. Installing the optional EKBUHAA(6V3/6W1) heater

kit" on page 26 for details.

6. Preparation

6.1. Preparing installation site

Do NOT install the unit in places often used as work place. In case of
construction works (e.g. grinding works) where a lot of dust is
created, the unit must be covered.

Choose the installation location with sufficient place for carrying the
unit in and out of the site.

6.1.1. Installation site requirements of the indoor unit

Select an installation site that meets the following requirements:
 All piping lengths and distances have been taken into

consideration (for requirements of piping length for the
refrigerant piping, refer to the outdoor unit installation manual):

 Mind the measurement guidelines:

NOTICE

 Make sure the auxiliary boiler and its integration in the

system complies with applicable legislation.

 Daikin is NOT responsible for incorrect or unsafe

situations in the auxiliary boiler system.

C

B

A

d

B

A

d

b

e

c

f f

ii

a

g

h

g

a

cbd

e

f

e

WARNING

Be sure to provide for adequate measures in order to
prevent that the unit is used as a shelter by small animals

Small animals making contact with electrical parts can
cause malfunctions, smoke or fire. Please instruct the
customer to keep the area around the unit clean and clear.

Requirement Value

Maximum refrigerant piping length between indoor
unit and outdoor unit.

<135 m

(a)

(a) Refer to VRV IV piping lenght restrictions to judge the complete VRV system

integration.

Maximum height difference between indoor unit and
outdoor unit.

<15 m

(a)

NOTICE

Mind the following spacing installation guidelines.

Installation and operation manual

8

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

 The space around the unit allows for sufficient air circulation.
 There is no danger of fire due to leakage of inflammable gas.
 The equipment is not intended for use in a potentially explosive

atmosphere.

 Take care that in the event of a water leak, water cannot cause

any damage to the installation space and surroundings.

 Be sure that sufficient precautions are taken, in accordance with

the applicable legislation, in case of refrigerant leakage.

 When installing the unit in a small room, take measures in order

to keep the refrigerant concentration from exceeding allowable
safety limits in the event of a refrigerant leak.

 Do not climb, sit or stand on top of the unit.
 Do not place any objects or equipment on top of the unit (top

plate).

Do NOT install the unit in places such as:
 Where there is mist of mineral oil, oil spray or vapour.

Plastic parts may deteriorate, and cause them to fall out or water
to leak.

 Do NOT install the unit in sound sensitive areas (e.g. near a

bedroom and the like), so that the operation noise will cause no
trouble.
Note: If the sound is measured under actual installation
conditions, the measured value will be higher than the sound
pressure level mentioned in Sound spectrum due to
environmental noise and sound reflections.

 The foundation must be strong enough to bear the weight of the

unit.
Make sure, in the event of a water leak, water cannot cause any
damage to the installation space and surroundings.

 In places with high humidity (max. RH=85%), for example a

bathroom.

 In places where frost is possible. Ambient temperature around

the indoor unit should be >5°C.

 The indoor unit is designed for indoor installation only and for

indoor ambient temperatures ranging 5~35°C in cooling mode
and 5~30°C in heating mode.

6.2. Preparing water circuit

6.2.1. Selection of the type of heat emitters

The selection of the heat emitter is the choice of the end customer.
The choice of the heat emitter will define the needed water
temperature from the unit.

Based on the needed water temperature for the heat emitters,
following range can be defined:

1 Low temperature (heating leaving water temperature range from

25°C to 40°C, cooling leaving water temperature range from
25°C to 18°C).
Typical example: floor heating.

2 Medium temperature (leaving water temperature range from

40°C to 45°C), cooling leaving water temperature range from
12°C to 7°C.
Typical example: low temperature radiators (heating) and
convectors (heating and cooling).

Once the heat emitters are chosen, the capacity of these heat
emitters should be defined and from this the dimensioning and
position of the heat emitters in the different rooms should be decided.

An important parameter of the heat emitters is the temperature
difference between entering water and leaving water.

This will define the water flow in the system.

Finally, the piping layout from the heat source to the different heat
emitters needs to be drawn.

This will finally define following important parameters:

 Minimal water volume in the system.
 Maximal water volume in the system.
 Minimal and maximal water flow in system.
 Maximal pressure drop in the system.

WARNING

Excessive refrigerant concentrations in a closed room can
lead to oxygen deficiency.







  

(mm)

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

9

6.2.2. Water circuit requirements

 Use the indoor unit only in a closed water system.

Using the system in an open water system will lead to excessive
corrosion.

 Maximum water temperature is 45°C (heating) and mimimum

water temperature is 5°C (cooling).

 The maximum water pressure is 3 bar.

Provide adequate safeguards in the water circuit to ensure that
the maximum pressure is NOT exceeded.

 All installed piping and piping accessories (valve,

connections,…) must withstand the following temperatures.

a Outdoor unit (VRV IV heat pump)
b Indoor unit HXY(080/125)
c Heat exchanger
dPump
e Shut-off valve

f Motorised 2-way valve (field supply)
g Collector

FCU1...3 Fan coil unit (op ional)

FHL1...3 Floor hea ing loop (optional)

T Room thermostat (optional)

 Shut-off valves delivered with the unit should be installed so that

normal servicing can be accomplished without draining the
system.

 Make all water piping connections in accordance with the

applicable legislation and the outlook diagram that is delivered
with the unit, respecting the water inlet and outlet.

 Do NOT use excessive force when connecting the piping.

Deformation of the piping can cause malfunctioning of the unit.

 Provide drain taps at all low points of the system in order to allow

complete drainage of the water circuit.

 Provide a proper drain for the pressure relief valve to avoid

water coming into contact with electrical parts.

 Provide air vents at all high points of the system, which must

also be easily accessible for servicing. An automatic air purge is
provided in the indoor unit. Check that the air purge is NOT
tightened too much, so that automatic release of air in the water
circuit is possible.

 Only use materials that are compat ble with water used in the

system and with the materials used in the indoor unit.

 Check that all components in the field piping can withstand the

water pressure and water temperature.

 When using non-brass metallic piping, insulate the brass and

non-brass properly so that they do NOT make contact with each
other. This to prevent galvanic corrosion.

 Never use Zn-coated parts in the water circuit. Because the

unit's internal water circuit uses copper piping, excessive
corrosion may occur.

 Only use appropriate tooling to handle brass, which is a soft

material. If NOT, pipes will get damaged.

 Select the water piping diameter in relation to the required water

flow and the available external static pressure of the pump. See

"14. Technical Data" on page 40 for the external static pressure

curves of the indoor unit.

 You can find the minimum required water flow for the indoor unit

operation in the following table. When the water flow is lower,
flow malfunction A6 will be displayed and the indoor unit will be
stopped.

 It is strongly recommended to install an additional filter on the

heating water circuit. Especially to remove metallic particles
from the field heating piping, it is advised to use a magnetic or
cyclone filter, which can remove small particles. Small particles
may damage the unit and will NOT be removed by the standard
filter of the heat pump system.

 If air or dust gets into the water circuit, problems may occur. To

prevent this:

 Only use clean pipes

 Hold the pipe end downwards when removing burrs.

 Cover the pipe end when inserting it through a wall, to

prevent dust and/or particles entering the pipe.

 Use a decent thread sealant to seal connections.

 For safety reasons, it is NOT allowed to add any kind of glycol to

the water circuit.

 The installation must be in compliance with the applicable

legislation and may require additional hygienic installation
measures.



In accordance with the applicable

legislation, it may

be

necessary to install thermostatic mixing valves.

6.2.3. Formula to calculate the expansion vessel pre-pressure

The pre-pressure (Pg) of the vessel depends on the installation
height difference (H):

Pg=0.3+(H/10) (bar)

6.2.4. To check the water volume

The indoor unit has an expansion vessel of 10 litre with a factory set
pre-pressure of 1 bar.

To make sure that the unit operates properly:

 You must check the minimum and maximum water volume.
 You might need to adjust the pre-pressure of the expansion

vessel.

INFORMATION

The following illustration is an example and may NOT
match your system layout.

M

T

FCU2

FCU3

FHL1

FHL2

FHL3

abc

d e

ef

g

g

g

g

65°C

Model Minimum water flow (l/min)

HXY080A7V1B 15
HXY125A7V1B 15

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10

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VRV IV System indoor unit

4P325971-1B – 2012.07

Minimum water volume

Check that the total water volume in the installation is minimum
20 liter, the internal water volume of the indoor unit NOT included.

a Outdoor unit (VRV IV heat pump)
b Indoor unit HXY(080/125)
c Heat exchanger
dPump
eShut-off valve

f Collector (field supply)
g By-pass valve (field supply)

FHL1...3 Floor hea ing loop (field supply)

T1...3 Individual room thermostat (optional)

M1...3 Individual motorised valve to control loop FHL1...3

(field supply)

Maximum water volume

Use the following graph to determine the maximum water volume for
the calculated pre-pressure.

a Pre-pressure (bar)
b Maximum water volume (l)

Example: Maximum water volume and expansion vessel pre­pressure

6.2.5. Changing the pre-pressure of the expansion vessel

When changing the default pre-pressure of the expansion vessel
(1 bar) is required, take following guidelines into account:

 Only use dry nitrogen to set the expansion vessel pre-pressure.
 Inappropriate setting of the expansion vessel pre-pressure will

lead to malfunction of the system.

Changing the pre-pressure of the expansion vessel should be done
by releasing or increasing nitrogen pressure through the schräder
valve of the expansion vessel.

a Schräder valve

6.2.6. To check the water volume: Examples

Example 1

The indoor unit is installed 5 m below the highest point in the water
circuit. The total water volume in the water circuit is 100 l.

No actions or adjustments are required.

Example 2

The indoor unit is installed at the highest point in the water circuit.
The total water volume in the water circuit is 350 l.

Actions:
 Because the total water volume (350 l) is more than the default

water volume (280 l), the pre-pressure must be decreased.

 The required pre-pressure is:

Pg = (0.3+(H/10)) bar = (0.3+(0/10)) bar=0.3 bar.

 The corresponding maximum water volume at 0.3 bar is 410 l.

(See the graph in the chapter above).

 Because 350 l is lower than 410 l, the expansion vessel is

appropriate for the installation.

INFORMATION

In critical processes, or in rooms with a high heat load,
extra water might be required

NOTICE

When circulation in each space heating loop is controlled
by remotely controlled valves, it is important that the
minimum water volume is guaranteed, even if all of the
valves are closed.

FHL1

FHL2

FHL3

M1

T1

M2T2M3

T3

fecba g

de

0

.3

0

.5

1

1

.5

2

2

.5

10050

0

20

150 200 250 300 350 400 450

a

b

Installation
height
difference

(a)

(a) Thi s is the height difference (m) between the highest point of the water circuit an d

the indoor unit. If the indoor unit is at the highest point of the installation, the
installation height is 0 m.

Water volume
≤ 280 l >280 l

≤7 m No pre-pressure

adjustment is required.

Do he following:

• Decrease the
pre-pressure.

• Check if he water
volume does NOT
exceed the maximum
allowed water volume.

>7 m Do the following:

• Increase the
pre-pressure.

• Check if the water
volume does NOT
exceed the maximum
allowed water volume.

The expansion vessel of
the indoor unit is too small
for the installation.

NOTICE

Only a licensed installer may adjust the pre-pressure of the
expansion vessel.

a

HXY080+125A7V1B

VRV IV System indoor unit

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Installation and operation manual

11

6.3. Preparing electrical wiring

6.3.1. About preparing electrical wiring

6.3.2. Overview of electrical connections on the indoor unit

The following illustration shows the required field wiring.

a Dedicated power supply for the indoor unit
b HXY(080/125)

c User interface
d Optional user interface
e Optional heater kit

f Dedicated power supply for the external backup heater kit
g Optional room hermostat
h 230 VAC power supply

WARNING

 Establish proper earthing. Do NOT earth the unit to a

utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.

 Install the required fuses or circuit breakers.
 Secure the electrical wiring with cable ties so that the

cables do NOT come in contact with the piping or
sharp edges, particularly on the high-pressure side

 Do NOT use taped wires, stranded conductor wires,

extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.

 All wiring must be performed by an authorized

electrician and must comply with the applicable
legislation.

 Make electrical connections to the fixed wiring.
 All components procured on the site and all electrical

construction must comply with the applicable
legislation.

WARNING

 The indoor unit should have a dedicated power

supply.

 The optional heater kit (EKBUH) should have a

dedicated power supply.

a

b

1

a Normal power supply
bFuse
1 Power supply for indoor unit

INFORMATION

 The following illustration is an example and may NOT

match your system layout.

 For details see "14.2. Wiring diagram" on page 41.

Item Description Wiring

Maximum
running
current

High voltage wiring (High voltage bundle)

1 Indoor unit power supply 2+GND

(a)

(a) Refer to name plate on the indoor unit.

2 malfunction output 2 0.3 A

(b)

(b) Minimum cable section 0.75 mm².

3 Operation ON/OFF output 2 0.3 A

(b)

4 Cooling/heating output 2 0.3 A

(b)

5 Heater kit step 1/2 output 3

(b)

6 External heater kit power supply For details refer to the

installation manual provided
with the option kit.

Low voltage wiring (Low voltage bundle)

7 Indoor/outdoor transmission 2

(c)

(c) Cable section between 0.75 mm² and 1.25 mm².

8 User interface transmission 2

(c)

9 External heater kit safety 2

(b)

10 Thermostat input 1 2

(b)

11 Thermostat input 2 2

(b)

12 Operation ON signal 2

(b)

13 Operation OFF signal 2

(b)

14 230 V AC power supply (only for

wireless room thermostat EKRTR1)

2<1A

6

b

a

e

f

d

c

10

11

8

2

3

4

5

9

17

g

h

14

12

13

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12

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VRV IV System indoor unit

4P325971-1B – 2012.07

7. Installation

Before installing, first read the instructions of previous chapter.

7.1. Mounting the indoor unit

7.1.1. To install the indoor unit
1 Remove the accessories from the unit, see instructions in

chapter "3.1.2. To remove the accessories from the indoor unit"

on page 4.

2 Install indoor unit as follows.

7.1.2. To install the drainpan kit

If a drain pan kit (EKHBDPCA2) is required, install it before
connecting the refrigerant and water pipes and the electrical wiring.

To install, see the installation manual of the drain pan kit.

7.1.3. To connect the refrigerant piping to the outdoor unit

a Refrigerant liquid connection Ø9.52 mm
b Refrigerant gas connection Ø15.9 mm

1 Connect the liquid piping from the outdoor unit to the refrigerant

liquid connection of the indoor unit.

2 Connect the gas piping from the outdoor unit to the refrigerant

gas connection of the indoor unit.

INFORMATION

Installation shall be done by an installer, the choice of
materials and installation shall comply with the applicable
legislation. In Europe the EN378 is the applicable standard
that shall be used.

WARNING

Tear apart and throw away plastic packaging bags so that
children will not play with them. Children playing with
plastic bags face danger of death by suffocation.

CAUTION

Do NOT grasp the piping to lift the indoor unit.

NOTICE

Please install following the spacing installation guidelines
as described in "6.1.1. Installation site requirements of the

indoor unit" on page 7.

60kg

1

2

4x

1

2

3

3

2x

43 5 6

87

2x

9

2x

10

11

1

2

2

2

4x

12 13

b

a

HXY080+125A7V1B

VRV IV System indoor unit

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Installation and operation manual

13

For details concerning vacuuming and operating the unit during
vacuuming, see installation manual of outdoor unit.

For details concerning piping sizes and refnet selection, see
installation manual of the outdoor unit.

7.2. Connecting the water piping

7.2.1. To connect the water piping

To facilitate service and maintenance, 2 shut-off valves are provided.
Mount the valves on the water inlet and on the water outlet. Mind their
position. Orientation of the integrated drain valves is important for
servicing.

1 Install the shut-off valves on the water pipes.

a Water inlet
b Water outlet

2 Screw the indoor unit nuts on the shut-off valves.
3 Connect the field piping on the shut-off valves.

7.2.2. To install the bottom plate and connect safety valve
drain hose

7.2.3. To fill the water circuit
1 Connect the water supply hose to the drain and fill valve.

2 Open the drain and fill valve.
3 Make sure that the automatic air purge valve is open (at least 2

turns).

4 Fill the circuit with water until the manometer indicates a

pressure of ±2.0 bar.

5 Purge as much air as poss ble from the water circuit.

6 Close the drain and fill valve.
7 Disconnect the water supply hose from the drain and fill valve.

7.2.4. To insulate the water piping

The piping in the complete water circuit must be insulated to prevent
condensation during cooling operation and reduce capacity losses
during heating and cooling operations.

If the temperature is higher than 30°C and the humidity is higher than
RH 80%, the thickness of the sealing materials should be at least
20 mm to prevent condensation on the surface of the sealing.

NOTICE

Do NOT put power on the unit before vacuuming is
completed. In case this happened, refer to the instructions
in the installation manual of the outdoor unit to avoid dirt,
air or nitrogen to be trapped in the piping.

NOTICE

Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.

NOTICE

It is recommended to install a pressure reducing valve on
the cold water inlet in accordance with the applicable
legislation.

ab

1 2

4x

3

NOTICE

 Air in the water circuit can cause malfunctioning of the

flow switch. During filling, it may not be poss ble to
remove all the air from the circuit. Remaining air will
be removed through the automatic air purge valves
during the initial operating hours of the system.
Additional filling with water afterwards may be
required.
Pump only operation in order to purge the air of the
system is possible through field settings. Refer to field
settings of [E-04] in the chapter "[E] Service mode" on

page 21 for further details.

 The unit might dispose some excessive water through

the pressure relief valve.

 Water quality must be accordingly to EU directive

98/83 EC.

NOTICE

The water pressure needle on the manometer will vary
depending on the water temperature (higher pressure at
higher water temperature).

However, at all times water pressure shall remain above
1 bar to avoid air entering the circuit.

Installation and operation manual

14

HXY080+125A7V1B

VRV IV System indoor unit

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7.3. Connecting the electrical wiring

7.3.1. Precautions on electrical wiring work

7.3.2. System overview of field wiring

Field wiring consists out of power supply, indoor-outdoor
communication (= transmission F1F2) wiring, wiring of the user
interface (=P1P2), wiring for connection of options and field supply
accessories.

7.3.3. Requirements

A power supply (refer to the table mentioned in "6.3.2. Overview of

electrical connections on the indoor unit" on page 11) must be

provided for connection of the 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 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 "6.3.2. Overview of electrical connections on the indoor unit" on

page 11.

7.3.4. To open the switch box cover

7.3.5. To connect the electrical wiring on the indoor unit

1 Wiring should enter the unit from the bottom.
2 Routing of the wiring inside the unit and switchbox should be as

follows:

WARNING: Electrical Installation

All field wiring and components must be installed by an
installer and must comply with the applicable legislation.

NOTICE

Electrical wiring work recommendations.

To persons in charge of electrical wiring work.

Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.

WARNING

 A main switch or other means for disconnection,

having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with the
applicable legislation.

 Use only copper wires.
 All field wiring must be carried out in accordance with

the wiring diagram supplied with the unit and the
instructions given below.

 Never squeeze bundled cables and be sure that it

does not come in contact with the non-insulated
piping and sharp edges. Be sure no external pressure
is applied to the terminal connections.

 Power supply wires must be attached securely.
 Be sure to establish an earth. Do not earth the unit to

a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.

 Be sure to install an earth leakage protector in

accordance with the applicable legislation. Failure to
do so may cause electric shock or fire.

 Be sure to use a dedicated power circuit, never use a

power supply shared by another appliance.

 Be sure to install the required fuses or circuit

breakers.

NOTICE

The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.

It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo

equipment, personal computers, etc....

In extreme circumstances you shall keep distances of 3m
or more and use conduit tubes for power and transmission
lines.

INFORMATION

More information about the legend and the location of the
wiring diagram of the unit can be found in "14.2. Wiring

diagram" on page 41.

The Wiring diagram on the indoor unit is only for the indoor
unit.

For the outdoor unit refer to the wiring diagram of the
outdoor unit.

NOTICE

Check the table in "6.3.2. Overview of electrical

connections on the indoor unit" on page 11 to know which

wiring should be routed in the high voltage cable bundle
and which wiring should be routed in the low voltage cable
bundle.

4x

ab

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

15

a Low voltage cable bundle (see "6.3.2. Overview of

electrical connections on the indoor unit" on
page 11

b High voltage cable bundle (see "6.3.2. Overview of

electrical connections on the indoor unit" on
page 11

c Earth connec ion
d Op ional

3 Fix the cable with cable ties to the cable tie mountings to ensure

strain relief and to make sure that it does NOT come in contact
with the piping and sharp edges.

7.3.6. To connect the user interface

The unit is equipped with a user interface offering a user-friendly way
to set up, use and maintain the unit.

Before operating the user interface, follow this installation procedure.

Procedure

Remove the front part of the user interface

Insert a slotted screwdriver into the slots (1)
in the rear part of the user interface, and
remove the front part of the user interface.

Fixation of the user interface to the indoor unit

1 Fix the wallplate of the user interface to the frontplate of the unit.

For installation of the frontplate, see "7.4.1. To fix the user

interface cover to the indoor unit" on page 16.

2 Cut off a 2 wire conductor.
3 Connect the wires to the user interface as shown below.

From the rear

4 Reinstall the faceplate onto the wallplate.

First begin fitting from the clips at the bottom.

5 Remove the user interface cover from its hinge.

CAUTION

Do NOT push or place redundant cable length in the unit.

NOTICE

The wiring for connection is not included.

NOTICE

The user interface, delivered in a kit, has to be mounted
indoors.

NOTICE

The PCB is mounted in the faceplate of the user interface.

Be careful NOT to damage it.

INFORMATION

For connection to the switchbox see "7.3.5. To connect the

electrical wiring on the indoor unit" on page 14.

X2MX1M

X801M

A4P

b a

c

d

1

NOTICE

Be careful NOT to distort the shape of the backside of the
user interface by overtightening the mounting screws..

a

b

P1P

2

a Rear part of the user interface
b Front part of he user interface

1

2

1

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16

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VRV IV System indoor unit

4P325971-1B – 2012.07

Fixation of the user interface to the wall in case of installation as
room thermostat

1 Cut off a 2 wire conductor.
2 Fix the wallplate of the user interface to the wall.
3 Connect the wires tot the user interface as shown below.

From the bottom

4 Reinstall the faceplate onto the wallplate.

First begin fitting from the clips at the bottom.

How to connect for multi unit

7.4. Finishing the indoor unit installation

7.4.1. To fix the user interface cover to the indoor unit
1 Make sure that the front panel is removed from the indoor unit.

See To open the indoor unit.

2 Plug the hinges into the backside of the front panel.

3 Plug the user interface cover into the hinges.

4 Mount the front panel to the indoor unit.

7.4.2. To close the indoor unit
1 Close the switch box cover.
2 Install the front panel as shown below.

NOTICE

Be careful NOT to distort the shape of the backside of the
user interface by overtightening the mounting screws..

INFORMATION

If next to the standard remote controller the optional
remote controller is installed as well:

 Connect the electrical wires of both remote controllers

in the same way l ke descr bed above.

 Select a master and a slave remote controller by

switching the SS1 selector switch.

Only the remote controller set as master can work as room
thermostat.

INFORMATION

For multiple unit control, connect the remote controller to
the unit as instructed above. For all other units to be
controlled by this controller every next unit has to be
connected as shown in the figure below (meaning: make a
connection from P1 of the previous unit to P1 of the next
unit, and make a connection from P2 of the previous unit to
P2 of the next unit, and so on...).

Limitation: 16 indoor units

a

b

P1P

2

c

a Rear part of the user interface

b Front part of the user interface

c Use rippers to notch he part for

the wiring to pass through

1

S

M

PCB

SS1

S Slave
M Master

P1 P1 P1P2

P1 P2

P2 P2

remote controller

NOTICE

When closing the indoor unit cover, make sure that the
tightening torque does NOT exceed 4.1 Nm.

NOTICE

Be careful NOT to pinch the wiring when attaching the
frontplate to the unit.

2x

1

2

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

17

8. Commissioning

8.1. Pre-operation checks

After the installation of the unit, check the following:

1 Field wiring

Make sure that the field wiring has been carried out according to
the instructions descr bed in the chapter "6.3. Preparing

electrical wiring" on page 11, according to the wiring diagrams

and according to European and national regulations.

2 Fuses and protection devices

Check that the fuses and other locally installed protection
devices are of the size and type specified in the chapter

"Electrical specifications table" on page 43. Make sure that

neither a fuse nor a protection device has been bypassed.

3 Earth wiring

Make sure that the earth wires have been connected properly
and that the earth terminals are tightened.

4 Internal wiring

Visually check the switch box and the inside of the unit on loose
connections or damaged electrical components.

5 Installation

Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.

6 Damaged equipment

Check the inside of the unit on damaged components or
squeezed pipes.

7 Refrigerant leak

Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak try to repair the leak (recovery, repair, and
vacuuming needed). If it is impossible to repair by yourself, call
your local dealer.
Do not touch any refrigerant which has leaked out of refrigerant
piping connections.
This may result in frostbite.

8 Vacuuming/recovery and refrigerant charging

Refer to the outdoor unit manual for more details.

9 Water leak

Check the inside of the unit on water leakage. In case there is a
water leakage try to repair the leak. If it is impossible to repair by
yourself, close the water inlet and water outlet shut-off valves
and call your local dealer.

10 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.

11 Air purge valve

Make sure the air purge valve of the heat pump is open (at least
2 turns).

12 Shut-off valves

Make sure that the shut-off valves are correctly installed and
fully open.

Once all checks are fulfilled, the unit must be closed, only then can
the unit be powered on. When the power supply to the indoor unit is
turned on, "88" is displayed on the user interface during its
initialization, which might take up to 30 seconds. During this process
the user interface can not be operated.

8.2. Final air purging

To get rid of all the air in the system, the pump should be operated.

Therefore, change the field setting [E-04] as explained in the chapter

"8.3. Field settings" on page 17. More details about setting "[E-04]
Pump only operation (air purge function)" can be found on page 21.

8.3. Field settings

The indoor unit should be configured by the installer to match the
installation environment (outdoor climate, installed options, etc.) and
user demand. Therefore, a number of so called field settings are
available. These field settings are access ble and programmable
through the user interface on the indoor unit.

Each field setting is assigned a 3-digit number or code, for example
[5-03], which is indicated on the user interface display. The first digit
[5] indicates the 'first code' or field setting group. The second and
third digit [03] together indicate the 'second code'.

A list of all field settings and default values is given in the "8.4. Field

setting list for Installation Manual" on page 22. In this list we provided

2 columns to register the date and value of altered field settings at
variance with the default value.

8.3.1. Procedure

To change one or more field settings, proceed as follows.

1 Press the z button for a minimum of 5 seconds to enter FIELD

SET MODE.
The $ icon (3) will be displayed. The current selected
field setting code is indicated ; (2), with the set value
displayed to the right - (1).

2 Press the ébi button to select the appropriate field setting

first code.

3 Press the ébj button to select the appropriate field setting

second code.

4 Press the pfi button and pfj button to change

the set value of the select field setting.

5 Save the new value by pressing the pr button.

NOTICE

It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.

WARNING

Switch off the power supply before making any
connections.

NOTICE

Operating the system with closed valves will damage the
pump!

Installation and operation manual

18

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VRV IV System indoor unit

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6 Repeat step 2 through 4 to change other field settings as

required.

7 When finished, press the z button to exit FIELD SET MODE

.

8.3.2. Detailed description

For a summary of all field settings refer to "8.4. Field setting list for

Installation Manual" on page 22.

[0] Remote control setup

 [0-00] User permission level

The user interface can be programmed to make certain buttons
and functions unavailable for the user. There are 2 permission
levels defined. Both levels (level 2 and level 3) are basically the
same, the only difference is that for level 3 no water temperature
settings are possible (see table below).

By default no level is defined so all buttons and functions are
operable.
The actual permission level is determined by field setting. For
permission level 2, set field setting [0-00] to 2, for permission
level 3, set field setting [0-00] to 3.
Once the field setting is set, the chosen permission level is not
yet active. Enabling the selected permission level is done by
simultaneously pressing buttons pi and pj immediately
followed by simultaneously pressing buttons s and ba, and
keeping all 4 buttons pressed for at least 5 seconds. Note that
no indication on the user interface is given. After the procedure
the blocked buttons will not be available anymore.
Deactivating the selected permission level is done in the same
way.

 [0-01] Room temperature compensation value

If needed, it is possible to adjust some thermistor value of the
unit by a correction value. This can be used as countermeasure
for thermistor tolerances or capacity shortage.
The compensated temperature (= measured temperature plus
compensation value) is then used for controlling the system and
will be displayed in the temperature read-out mode. See also

"[9] Automatic temperature compensation" on page 21 for

compensation values for leaving water temperature.

 [0-02] Setting not applicable
 [0-03] Status: defines whether the ON/OFF instruction can be

used in the schedule timer for space heating.
Refer to the operation manual for details how to program the
schedule timer.
The schedule timer for space heating can be programmed in
2 different ways: based on the temperature set point (both
leaving water temperature and room temperature) and based on
the ON/OFF instruction.

In the following tables both methods on how to interpret the schedule
timer are shown.

INFORMATION

 Changes made to a specific field setting are only

stored when the pr button is pressed. Navigating to
a new field setting code or pressing the z button will
discard the change made.

 The field settings are grouped by their field setting first

code.

 For example, field settings [0-00]; [0-01]; [0-02]; [0-03]

are defined as "Group 0".

 When different values are changed within the same

group, pressing the pr button will save all the values
changed within this group.

 Be aware of this when changing field settings within

the same group and pressing on the pr button.

INFORMATION

 Before shipping, the set values have been set as

shown under "8.4. Field setting list for Installation

Manual" on page 22.

 When exiting FIELD SET MODE, "88" may be

displayed on the user interface LCD while the unit
initializes itself.

NOTICE

When running through the field settings you may notice
that there are some more field settings as there are
mentioned in the "8.4. Field setting list for Installation

Manual" on page 22. These field settings are not appli-

cable and may not be changed!

Permission

level 2 level 3

Operation ON/OFF Operable Operable

Setting the leaving water temperature Operable —

Setting the room temperature Operable Operable

Weather dependent set point operation
ON/OFF

Operable —

Setting the clock — —

Programming the schedule timer — —

Schedule timer operation ON/OFF Operable Operable

Field settings — —

malfunction code display Operable Operable

Test opera ion — —

INFORMATION

By default space heating based on temperature set point
(method 1) is enabled, so only temperature shifts are
possible (no ON/OFF instruction).

Method 1 Space heating based on temperature set point

(a)

(a) For leaving water temperature and/or room temperature

During opera ion During schedule timer operation the opera ion LED is lit

continuously.

When pushing

he y button

The schedule timer for space heating will stop and will
not start again.
The controller will be switched off (operation LED will
stop working).

When pushing

he pr button

The schedule imer for space heating will be stopped and
will not start again.
The schedule timer icon will not be displayed anymore.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

19

Operation example: Schedule timer based on temperature set
points.

When setback function (refer to "[2] Automatic setback function" on

page 19) is enabled, the setback operation will have priority over the

scheduled action in the schedule timer.

Operation example: Schedule timer based on ON/OFF instruction.

When setback function (refer to "[2] Automatic setback function" on

page 19) is enabled, the setback operation will have priority over the

scheduled action in the schedule timer if ON instruction is active. If
OFF instruction is active this will have priority over the setback
function. At any time the OFF instruction will have the highest priority.

 [0-04] Status: defines whether the ON/OFF instruction can be

used in the schedule timer for cooling.
Same as for [0-03] but for cooling schedule timer.
For cooling, no setback function is available.

[1] Settings are not applicable

[2] Automatic setback function

Setback function provides the possibility to lower the room
temperature. The setback function can for instance be activated
during the night because the temperature demands during night and
day are not the same.

 [2-00] Status: defines whether the setback function is turned ON

(1) or OFF (0)

 [2-01] Start time: time at which setback is started
 [2-02] Stop time: time at which setback is stopped

Setback can be configured for both room temperature control and
leaving water temperature control.

1 Schedule imer
2 Setback function
3 When both setback function and schedule timer are enabled

A Setback function

t Time

T Temperature set point

Room temperature

Leaving water temperature

Method 2 Space heating based on ON/OFF instruction

During operation When the schedule timer switches space heating OFF,

the controller will be switched off (operation LED will stop
working).

When pushing
the y button

The schedule timer for space hea ing will stop (when
active at hat moment) and will start again at he next
scheduled ON function.
The "last" programmed command overrules he
"preceding" programmed command and will remain
active un il the "next" programmed command occurs.

Example: imagine the actual time is 17:30 and
actions are programmed at 13 00, 16:00 and
19:00. The "last" programmed command
(16:00) overruled the "previous" programmed
command (13:00) and will remain active until
the "next" programmed command (19:00)

occurs.
So in order to know the actual set ing, one should consult
the last programmed command. It is clear that the "last"
programmed command may date from the day before.
Refer to the operation manual.
The controller will be switched off (operation LED will
stop working).
However the schedule timer icon will stay displayed.

When pushing
the pr button

The schedule timer for space heating will be stopped and
will not start again.
The schedule imer icon will not be displayed anymore.

T

t

6:30 9:00

16:00

0:30

19C 19C 19C

22C

21C

42C 42C 42C

45C

44C

42C

19C 19C 19C

22C

21C

42C 42C

45C

44C

0:30

1

T

t

18C

37C37C

18C

A

5:0023:00 5:0023:00

2

T

t

5:00 9:00

16:00

23:00

19C

18C

19C

22C

21C

40C

42C

45C

44C

40C

19C

18C

19C

22C

21C

42C

19C

19C

42C

19C

42C

19C19C19C

42C

45C

44C

6:30

3

37C37C

40C

40C

1 Schedule timer
2 Setback function
3 When both se back func ion and schedule timer are enabled
A Setback function
B ON/OFF instruction

t Time

T Temperature set point

Room temperature

Leaving water temperature

INFORMATION

 By default the setback function is enabled.
 The setback function can be combined with the

automatic weather dependent set point operation.

 Setback function is an automatic daily scheduled

function.

t

18C

40C40C

18C

A

5:0023:00 5:0023:00

2

B

t

9:00

16:00

19C 19C

22C

21C

42C 42C

45C

44C

19C 19C

22C

21C

42C 42C

45C

44C

1

OFF ONON

6:300:30

B

t

6:30 9:00

16:00

23:00

19C 19C

22C

21C

42C 42C

45C

44C

19C 19C

22C

21C

42C 42C

45C

44C

3

OFF ONON

18C

40C40C

18C

Installation and operation manual

20

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Refer to "[5] Automatic setback" on page 20 for temperature set
points.

[3] Weather dependent set point (Heating)

When weather dependent operation is active, the leaving water
temperature is determined automatically depending on the outdoor
temperature: colder outdoor temperatures will result in warmer water
and vice versa. The unit has a floating set point. Activating this
operation will result in a lower power consumption than use with a
manually fixed leaving water set point.

During weather dependent operation, the user has the poss bility to
shift up or down the target water temperature by a maximum of 5°C.
This "Shift value" is the temperature difference between the
temperature set point calculated by the controller and the real set
point. E.g. a positive shift value means that the real temperature set
point will be higher than the calculated set point.

It is advised to use the weather dependent set point because it
adjusts the water temperature to the actual needs for space heating.
It will prevent the unit from switching too much between thermo ON
operation and thermo OFF operation when using the user interface
room thermostat or external room thermostat.

 [3-00] Low ambient temperature (Lo_A): low outdoor

temperature.

 [3-01] High ambient temperature (Hi_A): high outdoor

temperature.

 [3-02] Set point at low ambient temperature (Lo_Ti): the target

outgoing water temperature when the outdoor temperature
equals or drops below the low ambient temperature (Lo_A).
Note that the Lo_Ti value should be higher than Hi_Ti, as for
colder outdoor temperatures (i.e. Lo_A) warmer water is
required.

 [3-03] Set point at high ambient temperature (Hi_Ti): the target

outgoing water temperature when the outdoor temperature
equals or rises above the high ambient temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.

[4] Settings are not applicable

[5] Automatic setback

 [5-00] Setting is not applicable.
 [5-01] Setting is not applicable.
 [5-02] Leaving water setback temperature.
 [5-03] Room setback temperature.
 [5-04] Setting is not applicable.

[6] Option setup

 [6-01] External room thermostat.

If the optional external room thermostat is installed, its operation
must be enabled by field setting. Default [6-01]=0, which means
no external room thermostat is installed.

 Set [6-01]=2 if the optional external room thermostat is

installed. The external room thermostat only gives an
ON/OFF signal to the heat pump based on the room
temperature.

 Set [6-01]=1 in case a heating thermostat ON or cooling

thermostat ON function is required (when using optional
EKRTWA or EKRT1). The processing of thermostat ON will
depend on the system’s operation mode. Room thermostat
input 1 = heating input, room thermostat input 2 = cooling

input.
Because the external room thermostat does not give continuous
feedback information to the heat pump, it is supplementary to
the user interface room thermostat function. To have a good
control of the system and avoiding frequent ON/OFF it is
advised to use the automatic weather dependent set point
operation.
Room thermostat input 1 = operation ON (1)/OFF (0).
Room thermostat input 2 = operation ON (1)/OFF (0).
See "14.2. Wiring diagram" on page 41 for connection details.

The operation mode of the unit is subject in the master VRV DX
indoor remote controller.

 [6-02] Heater kit option.

To activate the heater kit as an option of the HXY(080/125) heat
pump, change field setting [6-02]=1 (default value is "0").
From that moment on, the heat pump system will take the heater
kit into account whilst deciding operation. When the heater is
actually operating, the heater symbol is shown on the remote
controller of the hydrobox. Refer to "9. Installing the optional

EKBUHAA(6V3/6W1) heater kit" on page 26.

 [

6-03] Settin

g is not applicable.

[8] Option setup

 [8-00] User interface temperature control.

 [8-00]=0 the unit operates in leaving water temperature

control. This is the default setting.
 [8-00]=1 the unit operates in room temperature control. This

means that the user interface is used as room thermostat, so

the user interface can be placed in the living room to control

the room temperature.

 [8-01] Setting is not applicable.

A Normal room temperature set point
B Room setback temperature [5-03]

t Time

T Temperature

A Normal leaving water temperature set point
B Leaving water setback temperature =A–[5-02]

t Time

T Temperature

T

t

Target water temperature

T

A

Ambient (outdoor) temperature

Shift value = Shift value

[2-01] [2-02]

A

B

T

t

21°C

18°C

[2-01] [2-02]

B

A

T

t

45°C

40°C

5°C [5-02]

Lo Ti

Lo A Hi A T

A

T

t

+ 05

00

– 05

Hi Ti

Shift value

INFORMATION

If by mistake the value of [3-03] is set higher than the value
of [3-02], the value of [3-03] will always be used.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

21

 [8-02] Emergency operation.

In case of emergency, heating can be provided by the heater kit,
not by hydrobox. Emergency mode can be activated by setting
[8-02]=1 (default value is "0").
Activating the emergency mode will stop the heat pump
operation of the hydrobox. The pump of the indoor unit will be
started, but heating itself is done by the heater kit. If there are no
malfunction conditions in leaving or return water thermistors of
the hydrobox, the heater kit can start to follow emergency
operation.

 [8-03] Setting is not applicable.
 [8-04] Freeze-up prevention.

The unit has a freeze-up prevention functionality for which
3 levels can be selected:

 [8-04]=0 prevention level 0 (default: no prevention).
 [8-04]=1 prevention level 1.
 [8-04]=2 prevention level 2.

The freeze-up prevention is only active when the unit is in
thermo OFF condition. If prevention level 1 is enabled, the
freeze-up prevention will start if the outdoor ambient
temperature <4°C and if leaving or return water temperature
<7°C. For prevention level 2, the freeze-up prevention will start
as soon as the ambient temperature <4°C.
For both cases the pump will operate and if leaving or return
water <5°C for 5 minutes the unit will start up to prevent too low
temperatures.

[9] Automatic temperature compensation

If needed, it is possible to adjust some thermistor value of the unit by
a correction value. This can be used as countermeasure for
thermistor tolerances or capacity shortage.

The compensated temperature (= measured temperature plus
compensation value) is then used for controlling the system and will
be displayed in the temperature read-out mode.

 [9-00] Leaving water temperature compensation value for

heating operation.

 [9-01] Leaving water thermistor auto corrective function.

When enabled, this function will take into account the outdoor
ambient conditions and correct the measured value which will be
used for the logic.
Eg. when the ambient temperature is high during cooling mode,
the logic will correct the measured value of the leaving water
thermistor to a lower value to take into account influence of high
ambient temperatures in the measurement.

 [9-02] Setting is not applicable.
 [9-03] Leaving water temperature compensation value for

cooling operation.

 [9-04] Setting not applicable.

[A] Option setup

 [A-00] Setting is not applicable.
 [A-01] Setting is not applicable.
 [A-02] Pump target ∆T setting (heating).

Depending on the systems emitter type, the ∆T over the emitter
can be modified within the range 3~8°C. Default value is 5°C for
fancoil units or floor heating loops.

 [A-03] Leaving water temperature overshoot/undershoot value

This setting makes it poss ble to set the allowable overshoot
(heating)/undershoot (cooling) when operating the unit during
leaving water control.

 [A-04] Setting is not applicable.

[b] Settings are not applicable

[C] Leaving water temperature limits

 [C-00] Maximum leaving water set point in heating operation.



[C-01] Minimum lea

v

ing water set point in heating operation.

 [C-02] Maximum leaving water set point in cooling operation.
 [C-03] Minimum leaving water set point in cooling operation.

If a leaving water temperature of 5°C is wanted, this limit needs
to be adjusted. Be aware this can have an impact towards the
efficiency of your system.

 [C-04] Setting is not applicable.

[d] Settings are not applicable

[E] Service mode

 [E-00] Setting is not applicable.
 [E-01] Setting is not applicable.
 [E-02] Setting is not applicable.
 [E-03] Setting is not applicable.
 [E-04] Pump only operation (air purge function)

When installing and commisioning the unit it is very important to
get all air out of the water circuit.
Through this field setting the pump can be operated without
actual operation of the unit. By doing so this will enhance the air
removal from the unit.

 [E-04]=0 normal operation of the unit (default)
 [E-04]=1 low pump speed operation
 [E-04]=2 high pump speed operation

If you select [E-04]=1 or 2, the unit will activate the air

purging function. This function is a helpful feature to get all air

removed out of the system (as well in space heating as

space cooling).

[F] Option setup

 [F-00] Pump target ∆T setting (cooling).

Depending on the systems emitter type, the ∆T over the emitter
can be modified within the range 3~8°C. Default value is 5°C for
fancoil units or floor heating loops.

 [F-01] Setting is not applicable.
 [F-02] Setting is not applicable.
 [F-03] Setting is not applicable.
 [F-04] Setting is not applicable.

[E-04]=1 or 2



Pump operation for 40 minutes

Installation and operation manual

22

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

8.4. Field setting list for Installation Manual

First
code

Second
code

Setting name

Installer setting at variance with default value

Default

value

Range Step UnitDate Value Date Value

0 Remote control setup

00 User permission level.

22~31—

01 Room temperature compensa ion value.

0 –5~5 0 5 °C

02 Not applicable. Do not change he default value.

1———

03 Status: space heating schedule timer mode

Method 1=1 / Method 2=0.

1 (ON) 0/1 — —

04 Status: space cooling schedule timer mode

Method 1=1 / Method 2=0.

1 (ON) 0/1 — —

1 Settings are not applicable

00 Not applicable. Do not change he default value.

1———

01 Not applicable. Do not change he default value.

1:00 — — —

02 Not applicable. Do not change he default value.

0———

03 Not applicable. Do not change he default value.

15 00 — — —

2 Automatic setback function

00 Status: se back operation.

1 (ON) 0/1 — —

01 Setback operation start time.

23 00 0 00~23:00 1:00 hour

02 Setback operation stop time.

5:00 0 00~23:00 1:00 hour

3 Weather dependent set point

00 Low ambient temperature (Lo_A).

–10 –20~5 1 °C

01 High ambient temperature (Hi_A).

15 10~20 1 °C

02 Set point at low ambient temperature (Lo_Ti).

40 25~80 1 °C

03 Set point at high ambient temperature (Hi_Ti).

25 25~80 1 °C

4 Settings are not applicable

00 Not applicable. Do not change he default value.

1———

01 Not applicable. Do not change he default value.

Fri — — —

02 Not applicable. Do not change he default value.

23 00 — — —

5 Automatic setback and disinfection set point

00 Not applicable. Do not change he default value.

70 — — —

01 Not applicable. Do not change he default value.

10 — — —

02 Leaving water setback temperature.

50~101°C

03 Room setback temperature.

18 17~23 1 °C

04 Not applicable. Do not change he default value.

0———

6 Option setup

01 External room thermostat installed.

0 (OFF) 0/2 — —

02 Heater kit option.

0 (OFF) 0/1 — —

03 Not applicable. Do not change he default value.

0———

8 Option setup

00 User interface temperature control.

0 (OFF) 0/1 — —

01 Not applicable. Do not change he default value.

1———

02 Emergency opera ion.

00/1——

03 Not applicable. Do not change he default value.

1———

04 Status: freeze-up prevention.

0 0~2 1 —

9 Automatic temperature compensation

00 Leaving water temperature compensation value

(heating).

0 –2~2 0 2 °C

01 Leaving water thermistor auto corrective function.

1 (ON) 0/1 1 —

02 Not applicable. Do not change he default value.

0———

03 Leaving water temperature compensation value

(cooling).

0 –2~2 0 2 °C

04 Not applicable. Do not change he default value.

0———

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

23

A Option setup

00 Not applicable. Do not change he default value.

0———

01 Not applicable. Do not change he default value.

0———

02 Pump target ∆T (hea ing).

53~81—

03 Allowable overshoot on leaving water.

31~50.5°C

04 Not applicable. Do not change he default value.

0———

b Settings are not applicable

00 Not applicable. Do not change he default value.

35 — — —

01 Not applicable. Do not change he default value.

45 — — —

02 Not applicable. Do not change he default value.

1———

03 Not applicable. Do not change he default value.

70 — — —

04 Not applicable. Do not change he default value.

70 — — —

C Leaving water temperature limits

00 Set point: heating leaving water maximum

temperature.

45 37~45 1 °C

01 Set point: heating leaving water minimum

temperature.

25 25~37 1 °C

02 Set point: cooling leaving water maximum

temperature.

20 18~22 1 °C

03 Set point: cooling leaving water minimum

temperature.

10 5~18 1 °C

04 Not applicable. Do not change he default value.

0———

d Settings are not applicable

00 Not applicable. Do not change he default value.

10 — — —

01 Not applicable. Do not change he default value.

30 — — —

02 Not applicable. Do not change he default value.

15 — — —

03 Not applicable. Do not change he default value.

15 — — —

04 Not applicable. Do not change he default value.

40 — — —

E Service mode

00 Not applicable. Do not change he default value.

0———

01 Not applicable. Do not change he default value.

0———

02 Not applicable. Do not change he default value.

0———

03 Not applicable. Do not change he default value.

1———

04 Pump only operation.

00~251—

F Settings are not applicable

00 Pump target ∆T (cooling).

53~81—

01 Not applicable. Do not change he default value.

0———

02 Not applicable. Do not change he default value.

1———

03 Not applicable. Do not change he default value.

10 — — —

04 Not applicable. Do not change he default value.

50 — — —

First
code

Second
code

Setting name

Installer setting at variance with default value

Default

value

Range Step UnitDate Valu e Date Val ue

Installation and operation manual

24

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

8.5. Final check and test run

8.5.1. Final check

Before switching on the unit, read the following:
 When the complete installation and all necessary settings have

been carried out, be sure that all panels of the unit are closed. If
this is not the case, inserting your hand through the remaining
openings can cause serious injury due to electrical and hot parts
inside the unit.

 The service panel of the switch box may only be opened by a

licensed electrician for maintenance purposes.

In order to purge most of the air out of the system perform a pump
operation as described below:

1 Change field setting [E-04]

The default value is 0.

 When changing the setting to 1, the pump will operate at low

speed (pump only, the unit will not operate).

 When changing the field setting to 2, the pump will operate at

high speed.

2 When air purging is finished, change the field setting back to 0.

It is the respons bility of the installer to make sure that the air is
purged out of the unit and system.

 Be sure that all stop valves are open. (Refer to vacuuming

procedure of the outdoor unit)

 Be sure that all water valves are open.

8.5.2. System test run

Before you can check test operation of each indoor unit separately,
you have to do the system test run. System test run is explained in
the installation manual of the outdoor unit. This is an automatic test
run which can take some time.

When the system test run is finished, it is poss ble to do an individual
test run as described in "8.5.3. Indoor unit individual test run" on

page 24. During this test run, the installer should check indicated

items.

8.5.3. Indoor unit individual test run

The installer is obliged to verify correct operation of the indoor and
outdoor unit after installation. Therefor a test run must be performed
according to the procedures descr bed below. At any time it is
possible to check correct operation of space heating/cooling.

Temperature read-out mode

On the user interface, the actual temperatures can be displayed.

1 Push and hold the ba button for 5 seconds.

The leaving water temperature is displayed (icons l and =
and é are blinking).

2 Use the pi and pj buttons to display:

 The entering water temperature (icons l and = are

blinking and the é icon is flashing slowly).

 The indoor temperature (icons l and = are blinking).

 The outdoor temperature (icons l and u are blinking).

3 Push the ba button again to leave this mode. If no button is

pressed, the user interface leaves the display mode after 10
seconds.

Proced

ure fo

r space heating/cooling

1 Check the leaving water and entering water temperature through

the user interface read-out mode and write down the displayed
values. See "Temperature read-out mode" on page 24.

2 Push the z button 4 times so the t icon will be displayed.

3 Perform the test as follows (when no action is performed, the

user interface will return to normal mode after 10 seconds or by
pressing the z button once):

To test the space heating/cooling operation push the y button
to start the test run operation.

4 The test run operation will end automatically after 30 minutes or

when reaching the set temperature. The test run operation can
be stopped manually by pressing the z button once. If there are
misconnections or malfunctions, an malfunction code will be
displayed on the user interface. Otherwise, the user interface
will return to normal operation.

5 To resolve the malfunction codes, see "8.6.2. Malfunction codes

list" on page 25.

6 Check the leaving water and entering water temperature through

the user interface read-out mode and compare them with the
values noted with step 1. After 20 minutes of operation an
increase/decrease of the values should confirm the space
heating/cooling operation.

NOTICE

When using thermostatic radiator valves, make sure to
open all valves during air purging operation.

INFORMATION

When the indoor units and outdoor unit are powered on for
the first time, an initialisation takes place. This will take
maximum 12 minutes.

When using the user interface during the initialisation, an
malfunction code (UH) can be displayed.

INFORMATION

 During the first start up of the unit (the first 50 hours of

compressor running), it might happen that the noise
level of the unit is higher than mentioned in the
technical specifications. This is not an abnormal
event.

 Start up of the unit in space heating mode is only

possible when the outdoor ambient temperature is
lower than 20°C.

INFORMATION

The operation mode can not be selected on the hydrobox.
The hydrobox follows the operation mode of the master
VRV DX Indoor Unit. Refer to outdoor unit manual for
further information.

INFORMATION

To display the last resolved malfunction code, push the z
button 1 time. Push the z button again 4 times to return to
normal mode.

INFORMATION

It is not possible to perform a test run if a forced operation
from the outdoor unit is in progress. Should forced
operation be started during a test run, the test run will be
aborted.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

25

8.6. Service and maintenance

In order to ensure optimal operation of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals.

This maintenance should be carried out by your local installer.

To execute maintenance first remove the panels as shown in

"7.4.2. To close the indoor unit" on page 16.

8.6.1. Maintenance activities

Checks

The described checks must be executed at least once a year by
qualified personnel.

1 Pressure relief valve hose (if present)

Check that the pressure relief valve hose is positioned
appropriately to drain the water.

2 Water pressure relief valve

Check for correct operation of the pressure relief valve by
turning the red knob on the valve counter-clockwise:

 If you do not hear a clacking sound, contact your local dealer.

 In case the water keeps running out of the unit, close both

the water inlet and outlet shut-off valves first and then contact
your local dealer.

3 Switch box

Carry out a thorough visual inspection of the switch box and look
for obvious defects such as loose connections or defective
wiring.

4 Water pressure

Check if the water pressure is above 1 bar.
If necessary add water.

5 Water filter

Clean the water filter.

8.6.2. Malfunction codes list

A more detailed malfunction code list can be found in the installation
manual of the outdoor unit.

8.6.3. Important information regarding the refrigerant used

This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol. Do not vent gases into the atmosphere.

Refrigerant type: R410A
GWP

(1)

value: 1975

(1)

GWP = global warming potential

DANGER: ELECTRICAL SHOCK

See "7.3.1. Precautions on electrical wiring work" on

page 14.

WARNING: ELECTRIC SHOCK

 Before carrying out any maintenance or repair activity,

always switch off the circuit breaker on the supply
panel, remove the fuses or open the protection
devices of the unit.

 Do not touch live parts for 10 minutes after the power

supply is turned off because of high voltage risk.

 Please note that some sections of the electric

component box are hot.

 Make sure you do not touch a conductive section.
 Do not rinse the unit. This may cause electric shocks

or fire.

Play it safe!

Touch a metal part by hand (such as piping sheet metal) in
order to eliminate static electricity and to protect the PCB
before performing service.

Malfunction

code

Failure cause Corrective action

A1

Failure of writing memory
(EEPROM malfunction)

Contact your local dealer.

A6

Malfunction water circuit • Make sure waterflow is

possible (open all valves in
the circuit).

• Force clean water hrough
the unit.

• Malfunction of pump.

• Malfunction of flowswitch.

A9

R410A expansion valve
malfunction.

• Check wiring connections.

• Contact your local dealer.

AA Heater kit malfunction • Make sure water flow is

possible.

• Contact your local dealer.

AJ

Capacity malfunction. Contact your local dealer.

C1

Bad ACS communication. Contact your local dealer.

C4

R410A liquid thermistor
malfunction.

• Check wiring connections.

• Contact your local dealer.

C9

Returning water thermistor
malfunction.

• Check wiring connections.

• Contact your local dealer.

CA

Heating/cooling leaving
water hermistor malfunction.

• Check wiring connections.

• Contact your local dealer.

CJ

User interface hermostat
thermistor malfunction.

Contact your local dealer.

E3

High pressure malfunc ion.
This malfunction is outdoor
unit related. Refer to outdoor
unit manual.

• Make sure the circuit is
filled with water (no air
inside, e.g. is he air purge
open?)

• Make sure water flow is
possible (open all valves in
the circuit).

• Make sure the water filter is
not blocked.

• Make sure all refrigerant
stop valves are open.

• Contact your local dealer.

E4

Low pressure malfunction.
This malfunction is outdoor

unit related. Refer to outdoor
unit manual.

Contact your local dealer.

J7 R410A gas thermistor

malfunction.

• Check wiring connections.

• Contact your local dealer.

U1

The phases of the power to
the unit is reversed.
This malfunction is outdoor
unit related. Refer to outdoor

unit manual.

Exchange two of the three
phases (L1, L2, L3) to make a
positive phase connection.

U2

Power supply malfunction.
This malfunction is outdoor
unit related. Refer to outdoor
unit manual.

• Check wiring connections.

• Contact your local dealer.

UA

Type connection problem. • Wait till initialisa ion

between outdoor module
and hydro module finished
(after power ON, wait at
least 12 minutes).

• Contact your local dealer.

UH

Address malfunction. Contact your local dealer.

Installation and operation manual

26

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

9. Installing the optional
EKBUHAA(6V3/6W1) heater kit

The heater kit option can be installed to assist the heat pump during
heating operation or to provide primary heating during emergency
situations.

Reference is made to the heater kit's installation/operation manual for
general installation information. The EKBUHAA can be used together
with HXY(080/125) hydrobox unit, when below instructions are
followed!

The information in this chapter provides additional information on
how to connect the EKBUHAA to the HXY(080/125) hydrobox series.

Items which are mentioned within this chapter replace information
which is provided in the EKBUHAA installation/operation manual.
Especially information on how to connect hydraulically (general
setup) and electrically (wiring) connect EKBUHAA to the
HXY(080/125) should be consulted in this chapter.

Hydraulic connection example and electrical connection are
explained below.

Hydraulic connection (general setup)

a Outdoor VRV IV heat pump
b VRV Direct Expansion (DX) Indoor unit cassette
c HXY(080/125)
d Heater kit (EKBUH)
e Refrigerant piping

Electric connection

The connection of EKBUHAA to HXY(080/125) hydrobox does not
require any optional PCB's to be installed in the HXY(080/125)
hydrobox. The EKRP1AHTA should not be used to connect the
heater kit to the HXY(080/125) hydrobox.

For details of the electrical connection of the EKBUHAA optional
heater kit to the HXY(080/125) hydrobox, refer to "14.2. Wiring

diagram" on page 41.

Field settings related to the backup heater

Refer to "8.3. Field settings" on page 17 how to make field settings
for field settings related to the EKBUHAA heater kit.

Other field settings which are explained in the EKBUHAA manual are
not applicable in combination with HXY(080/125) hydrobox. The
default values should be kept as mentioned in the installation field
setting list of the HXY(080/125) hydrobox.

Other information which is explained under field settings in the
EKBUHAA manual is not applicable in combination with the HXY
hydrobox.

10. Hand-over to the user

Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:

 Fill in the installer setting table (see chapter 10) with the actual

settings.

 Make sure that the user has the printed documentation and ask

him/her to keep it for future reference.

 Explain the user how to properly operate the system and what

he/she has to do in case of problems.

 Show the user what jobs he/she has to do in relation to

maintenance of the unit.

 Explain the user about energy saving tips as described in the

operation manual.

To be filled in by the installer once the test run is finished and the unit
operates properly

b

e

c

a

d

Tick  when checked

 Explain to he user what sytem is installed on site.

Complete the fill-in below for each unit.
The information may be useful for the user in future servicing.

Place of installation:

Model name
(see nameplate of
the unit)

Optional equipment

 Ensure hat the user has a printed version of the installation and

operation manual and ask him/her to keep it for future reference.

 Explain the user how to properly operate the system and what

he/she has to do in case of problems.

 Show the user what jobs he/she has to do in relation to

maintenance of the unit.

Date:

Signature:

Your product was
installed by:

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

27

11. Operation of the unit

Please read chapter 1 and 2 first before consulting this chapter.

11.1. Introduction

11.1.1. General information

The unit is the indoor part of the air to water/air VRV IV heat pump.
The unit is designed for wall mounted indoor installation and used for
heating/cooling applications. The unit can be combined with (field
supply) floor heating/cooling loops or fan coil units.

A user interface with room thermostat functionality is standard
supplied with this unit to control your installation.

Refer to chapter "4. About the units and options" on page 5.

11.2. Quick start-up of the unit

In this chapter the step-by-step procedure is explained for starting up
space cooling/heating.

The more detailed information of how the unit must be operated is
explained in the chapter "11.3. Operating the unit" on page 27.

The quick start-up offers the user the poss bility to start up the system
before reading the entire manual.

11.2.1. Space cooling/heating operation

11.3. Operating the unit

11.3.1. Operating the user interface

The user interface offers full control over your installation. It can
control all heating/cooling applications which vary in capacity,
electrical supply and installed equipment (options). Operating the
HXY080/125 unit comes down to operating the user interface.

WARNING

Before operating the unit, be sure the installation has been
carried out correctly by an installer.

If you feel unsure about the operation, contact your
installer for advice and information.

Confirm the operation mode

(a)

heating h or cooling c

(a) The operation mode can not be selected on the hydrobox. The hydrobox follows

the operation mode of the master VRV DX Indoor Unit. Refer to outdoor unit
manual for further information



Push the bi or bj button



Display: 88.8 starts

blinking

Display: "n"



Set desired room

temperature (e.g. 22°C)

The user interface room

thermostat function is

not active



Push the ébi or ébj

button



You have "room

temperature based"

control of your system

(user interface room

thermostat is installed)

You have "leaving water

temperature based" control of

your system

(default)



Set desired leaving water

temperature (e.g. 35°C for heating

or 18°C cooling).

If the display is blank, automatic

leaving water temperature is
enabled in heating operation.



Push the y button



The 0 LED will light up and he unit

will start.



For further details and advised settings, see " Programming" on

page 34, "11.3.4. Space cooling operation (c)" on page 29 and

"11.3.5. Space heating operation (h)" on page 29

CAUTION

 Do not rinse the unit. This may cause electric shock or

fire.

 Do not climb, sit or stand on top of the unit.
 Do not place any objects or equipment on the unit top

plate.

INFORMATION

It is advised to use the user interface, which includes room
thermostat function, delivered with the unit.

This will prevent excessive space heating/cooling and will
stop the outdoor and indoor unit when the room
temperature is above the thermostat set point. Based on
the request from the user there is an immediate feedback
to the compressor control which optimizes the
performance.

Refer to the typical application examples in the indoor
installation manual for more details.

WARNING

 Never let the user interface get wet. This may cause

an electric shock or fire.

 Never press the buttons of the user interface with a

hard, pointed object. This may damage the user
interface.

 Never inspect or service the user interface yourself,

ask a qualified service person to do this.

 Do not rinse the indoor unit. This may cause electric

shock or fire.

 Do not climb, sit or stand on top of the unit.
 Do not place any objects or equipment on the unit top

plate.

Installation and operation manual

28

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

11.3.2. Name and function of buttons and icons

1 ON/OFF BUTTON

y

The ON/OFF button starts or stops the space cooling/heating.
Pressing the ON/OFF button consecutively too many times may
cause malfunction of the system (maximum 20 times per hour).

2 OPERATION LED

0

The operation LED is lit during space heating/cooling operation.
The LED blinks if a malfunction occurs. When the LED is OFF,
space heating/cooling is inactive while the other operation
modes can still be active.

3 OPERATION MODE ICONS h, c

These icons indicate the current operation mode(s): heating (h)
or cooling (c).

4 EXTERNAL CONTROL ICON

e

This icon indicates that the unit is working in a forced operation.
As long as this icon is displayed, the user interface cannot be
operated or has limited functionality.

5 DAY OF THE WEEK INDICATOR

1234567

This indicator shows the current day of the week.
When reading or programming the schedule timer, the indicator
shows the set day.

6 CLOCK DISPLAY

8

The clock display shows the current time.
When reading or programming the schedule timer, the clock
display shows the action time.

7 SCHEDULE TIMER ICON

p

This icon indicates that the schedule timer is enabled.

8 ACTION ICONS

Q

These icons indicate the programming actions for each day of
the schedule timer.

9 OFF ICON

x

This icon indicates that the OFF action is selected when
programming the schedule timer.

10 INSPECTION REQUIRED

k and l

These icons indicate that inspection is required on the
installation. Consult your dealer.

11 TEMPERATURE DISPLAY

9

The display shows the current temperature of the installation
either leaving water temperature or actual room temperature.
When changing the room temperature set point, the set point will
be flashing for 5 seconds and then return to the actual room
temperature.

12 SETTING

$

This icon is displayed whenever the field setting mode is
entered.

13 NOT AVAILABL E

n

This icon is displayed whenever a non-installed option is
addressed or a function is not available. A function not available
can mean insufficient permission level or can mean that a slave
user interface is used (see installation manual).

14 DEFROST/START UP MODE ICON

d

This icon indicates that the defrost/start up mode is active.

15 COMPRESSOR ICON

ç

This icon indicates that the compressor in the outdoor unit of the
system is active.

16 PUMP ICON

é

This icon indicates that the circulation pump is active.

17 OUTDOOR TEMPERATURE DISPLAY

u

When this icon is flashing, the outdoor ambient temperature is
displayed. Refer to "11.3.7. Temperature read-out mode" on

page 31 for more information.

18 WEATHER DEPENDENT SET POINT ICON

a

This icon indicates that the controller will adapt the leaving water
temperature set point automatically, based on the outdoor
ambient temperature (during heating operation).

19 TEMPERATURE ICON

b

This icon is displayed when the actual room temperature or
room temperature set point is shown.
The icon is also displayed when the temperature set point is set
in schedule timer programming mode. Refer to

"11.3.7. Temperature read-out mode" on page 31 for more

information.

20 TEST OPERATION ICON

t

This icon indicates that the unit runs in test mode.

21 FIELD SET CODE

;

This code represents the code from the field set list. Refer to the

"8.3. Field settings" on page 17.

22 MALFUNCTION CODE

:

This code refers to the malfunction code list and is for service
purposes only. Refer to the malfunction code list

"8.6.2. Malfunction codes list" on page 25.

23 BUTTON

w

This button has no function.

24 WEATHER DEPENDENT SET POINT BUTTON

ba

This button enables or disables the weather dependent set point
function which is available in space heating operation.
If the controller is set to permission level 3 (refer to "Field
settings" in the installation manual), the weather dependent set
point button will not be operable.

25 INSPECTION/TEST OPERATION BUTTON

z

This button is used for installation purposes and changing field
settings. Refer to "8.3. Field settings" on page 17.

26 PROGRAMMING BUTTON

<

This multi-purpose button is used to program the controller. The
function of the button depends on the actual status of the
controller or on previous actions carried out by the operator.

27 SCHEDULE TIMER BUTTON

r/p

The main function of this multi-purpose button is to
enable/disable the schedule timer.
The button is also used to set the clock and to program the
controller. The function of the button depends on the actual
status of the controller or on previous actions carried out by the
operator.

135 6 228

13

32

23

11

17

19

14

4

7
9

12

10
20

31

24

25

21

18

30
29

28

26

27

21615

Master Slave

Permission

level 2 level 3

Operation ON/OFF 

Setting the leaving water temperature —

Setting the room temperature 

Weather dependent set point operation
ON/OFF



—

Setting the clock ——

Programming the schedule timer  ———

Schedule timer operation ON/OFF  — 

Field settings  ———

malfunc ion code display 

Test operation ——

 = operable

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

29

28 TIME ADJUST BUTTONS pi and pj

These multi-purpose buttons are used to adjust the clock, to
toggle between temperatures (water inlet/outlet temperature of
the unit, outdoor ambient temperature, actual room temperature)
and in schedule timer programming mode.

29 LEAVING WATER TEMPERATURE ADJUST BUTTONS

ébi and ébj

These buttons are used to adjust the leaving water temperature
set point in normal operation mode or in schedule timer
programming mode.
If the controller is set to permission level 3 (refer to "Field
settings" in the installation manual), the leaving water
temperature adjust button will not be operable.
In case the weather dependent set point operation is selected,
the unit has a floating set point. In this case, the a icon as well
as the shift value (in case not zero) will display.

30 ROOM TEMPERATURE ADJUST BUTTONS

bi and bj

These multi-purpose buttons are used to adjust the current room
temperature set point in normal operation mode or in schedule
timer programming mode.
When changing the room temperature set point, the set point
value on the display will be flashing. After 5 seconds the display
will show to the actual room temperature.

31 BUTTON

S

This button has no function.

11.3.3. Setting up the controller

After initial installation, the user can set the clock and day of the
week.

The controller is equipped with a schedule timer that enables the user
to schedule operations. Setting the clock and day of the week is
required to be able to use the schedule timer.

Setting the clock

1 Hold down the

pr button for 5 seconds.

The clock read-out and the day of week indicator start flashing.

2 Use the

pi and pj buttons to adjust the clock.

Each time the

pi or pj button is pressed, the time will

increase/decrease by 1 minute. Keeping the

pi or pj

button pressed will increase/decrease the time by 10 minutes.

3 Use the

ébi or ébj button to adjust the day of the week.

Each time the

ébi or ébj button is pressed the next or

previous day is displayed.

4 Press the

< button to confirm the current set time and day of the

week.
To leave this procedure without saving, press the pr button.

If no button is pressed for 5 minutes the clock and day of the
week will return to their previous setting.

Setting the schedule timer

To set the schedule timer, refer to chapter "11.3.10. Programming

and consulting the schedule timer" on page 33.

11.3.4. Space cooling operation (c)

Space cooling operation can be controlled in two different ways:

 based on room temperature,
 based on leaving water temperature (default).

The purpose of each operation and how the configuration is done, is
explained below.

Room temperature control

In this mode, cooling will be activated as required by the room
temperature set point. The set point can be set manually or through
the schedule timer.

Selecting space cooling operation

1 Use the y button to switch ON/OFF space cooling (c).

Icon c appears on the display as well as the corresponding
actual room temperature.
The operation LED 0 lights up.

2 Use the bi and bj buttons to set the desired room

temperature.
Temperature range for cooling: 16°C~32°C (room temperature)

Refer to "11.3.10. Programming and consulting the schedule

timer" on page 33 for setup of the schedule timer function.

3 Use the ébi and ébj buttons to select the leaving

water temperature which you want to be used to cool down your
system.

Leaving water temperature control (default)

In this mode, cooling will be activated as required by the water
temperature set point. The set point can be set manually or through
the schedule timer.

Selecting space cooling operation

1 Use the y button to switch ON/OFF space cooling (c).

Icon c appears on the display as well as the corresponding
water temperature set point.
The operation LED 0 lights up.

2 Use the ébi and ébj buttons to set the desired leaving

water temperature.
Temperature range for cooling: 5°C~20°C (leaving water

temperature).

Refer to "Programming space cooling" on page 34, "Programming

space heating" on page 35 for setup of the schedule timer function.

11.3.5. Space heating operation (h)

Space heating operation can be controlled in two different ways:

 based on room temperature,
 based on leaving water temperature (default).

The purpose of each operation and how the configuration is done, is
explained below.

R

oom

temperature control

In this mode, heating will be activated as required by the room
temperature set point. The set point can be set manually or through
the schedule timer.

INFORMATION

 The clock needs to be set manually. Adjust the setting

when switching from summertime to wintertime and
vice versa.

 If the controller is set to permission level 2 or 3 (refer

to "Field settings" in the installation manual), setting
the clock will not be poss ble.

 A power failure exceeding 2 hours will reset the clock

and the day of the week. The schedule timer will
continue operation, but with a disordered clock.
Therefor it will be needed to correct the clock and the
day of the week.

INFORMATION

When using room temperature control, space cooling
operation based on room temperature will have priority
over leaving water control.

Note that it is poss ble that the leaving water temperature
becomes lower than the set point if the unit is controlled by
room temperature.

INFORMATION

 When an external room thermostat is installed, the

thermo ON/OFF is determined by the external room
thermostat. The user interface is then operated in the
leaving control mode and is not functioning as a room
thermostat.

 The user interface ON/OFF status always has priority

over the external room thermostat!

 Setback operation and weather dependent set point

are not available in cooling operation.

Installation and operation manual

30

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Selecting space heating operation

1 Use the y button to switch ON/OFF space heating (h).

Icon h appears on the display as well as the corresponding
actual room temperature set point.
The operation LED 0 lights up.

2 Use the bi and bj buttons to set the desired room

temperature.
Temperature range for heating: 16°C~32°C (room temperature)

In order to avoid overheating, space heating is not operable
when the outdoor ambient temperature rises above a certain
temperature (see operation range).
Refer to "11.3.10. Programming and consulting the schedule

timer" on page 33 for setup of the schedule timer function.

3 Use the ébi and ébj buttons to select the leaving

water temperature which you want to be used to heat up your
system.

Automatic setback function

Setback function provides the poss bility to lower the room
temperature. The setback function can for instance be activated
during the night because the temperature demands during night and
day are not the same.

The setback function is configured through field settings. Refer to the
chapter "8.3. Field settings" on page 17 for a detailed description how
to set one or more field settings.

 [2-00] Status: defines whether the setback function is turned ON

(1) or OFF (0)

 [2-01] Start time: time at which setback is started
 [2-02] Stop time: time at which setback is stopped
 [5-03] Room setback temperature

A Normal room temperature set point
B Room setback temperature [5-03]

t Time

T Temperature

Leaving water temperature control (default)

In this mode, heating will be activated as required by the water
temperature set point. The set point can be set manually, through the
schedule timer or weather dependent (automatic).

Selecting space heating operation

1 Use the y button to switch ON/OFF space heating (h).

Icon h appears on the display as well as the corresponding
water temperature set point.
The operation LED 0 lights up.

2 Use the

ébi and ébj buttons to set the desired leaving

water temperature.
Temperature range for heating: 25°C~45°C (leaving water

temperature)
In order to avoid overheating, space heating is not operable
when the outdoor ambient temperature rises above a certain
temperature (see operation range).

Refer to "User interface schedule timer" for setup of the schedule
timer function.

Selecting weather dependent set point operation

When weather dependent operation is active, the leaving water
temperature is determined automatically depending on the outdoor
temperature: colder outdoor temperatures will result in warmer water
and vice versa. The unit has a floating set point. Activating this
operation will result in a lower power consumption than use with a
manually fixed leaving water set point.

During weather dependent operation, the user has the possibility to
shift up or down the target water temperature by a maximum of 5°C.
This shift value is the temperature difference between the
temperature set point calculated by the controller and the real set
point. E.g. a positive shift value means that the real temperature set
point will be higher than the calculated set point.

It is advised to use the weather dependent set point because it
adjusts the water temperature to the actual needs for space heating.
It will prevent the unit from switching too much between thermo ON
operation and thermo OFF operation when using the user interface
room thermostat or external room thermostat.

1 Press the ba button 1 time to select weather dependent set

point operation (or 2 times when the user interface room
thermostat function is used).

Icon a appears on the display as well as the shift value. The
shift value is not shown in case it is 0.

2 Use the ébi and ébj buttons to set the shift value.

Range for the shift value: –5°C to +5°C
Icon a will be displayed as long as the weather dependent set
point operation is enabled.

3 Press the ba button to deactivate weather dependent set point

operation.
The ébi and ébj buttons are used to set the leaving

water temperature.

INFORMATION

When using room temperature control, space heating
operation based on room temperature will have priority
over leaving water control.

Note that it is poss ble that the leaving water temperature
becomes higher than the set point if the unit is controlled
by room temperature.

INFORMATION

 Remark that the b icon will be flashing during setback

operation.

 By default the setback function is enabled.
 The setback function can be combined with the

automatic weather dependent set point operation.

 Setback function is an automatic daily scheduled

function.

INFORMATION

 While room temperature setback function is active,

leaving water setback operation is also performed.

 Pay attention not to set the setback value too low,

especially during colder periods (e.g. winter time). It is
possible that the room temperature can not be
reached (or it will take a much longer time) because of
the big temperature difference.

[2-01] [2-02]

A

B

T

t

21°C

18°C

NOTICE

 When an external room thermostat is installed, the

thermo ON/OFF is determined by the external room
thermostat. The user interface is then operated in the
leaving control mode and is not functioning as a room
thermostat.

 The user interface ON/OFF status always has priority

over the external room thermostat!

INFORMATION

During this operation, instead of showing the water
temperature set point, the controller shows the shift value
which can be set by the user.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

31

Field settings define the parameters for the weather dependent
operation of the unit. Refer to the chapter "8.3. Field settings" on

page 17 for a detailed description how to set one or more field

settings.

TtTarget water temperature

T

A

Ambient (outdoor) temperature

Shift value Shift value

 [3-00] Low ambient temperature (Lo_A): low outdoor

temperature.

 [3-01] High ambient temperature (Hi_A): high outdoor

temperature.

 [3-02] Set point at low ambient temperature (Lo_Ti): the target

outgoing water temperature when the outdoor temperature
equals or drops below the low ambient temperature (Lo_A).

 Note that the Lo_Ti value should be higher than Hi_Ti, as for

colder outdoor temperatures (i.e. Lo_A) warmer water is
required.

 [3-03] Set point at high ambient temperature (Hi_Ti): the target

outgoing water temperature when the outdoor temperature
equals or rises above the high ambient temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.

Automatic setback function

Setback function provides the poss bility to lower the room
temperature. The setback function can for instance be activated
during the night because the temperature demands during night and
day are not the same.

The setback function is configured through field settings. Refer to the
chapter "8.3. Field settings" on page 17 for a detailed description how
to set one or more field settings.

 [2-00] Status: defines whether the setback function is turned ON

(1) or OFF (0)

 [2-01] Start time: time at which setback is started
 [2-02] Stop time: time at which setback is stopped
 [5-02] Leaving water setback temperature (temperature drop)

A Normal leaving water temperature set point
B Leaving water setback temperature =A–[5-02]

t Time

T Temperature

11.3.6. Other operation modes

Start up operation (d)

During start up, the d icon displays, indicating that the heat
pump is starting up and is not working in a steady state condition.

Defrost operation (d)

In space heating operation, freezing of the outdoor heat exchanger
may occur due to low outdoor temperature. If this risk occurs, the
system goes into defrost operation. After a maximum of 15 minutes of
defrost operation, the system returns to space heating operation.
During defrost operation, space heating operation is not possible.

11.3.7. Temperature read-out mode

On the user interface, the actual temperatures can be displayed.

1 Push and hold the ba button for 5 seconds.

The leaving water temperature is displayed (icons l and =
and é are blinking).

2 Use the pi and pj buttons to display:

 The entering water temperature (icons l and = are

blinking and the é icon is flashing slowly).

 The indoor temperature (icons l and = are blinking).

 The outdoor temperature (icons l and u are blinking).

3 Push the ba button again to leave this mode. If no button is

pressed, the user interface leaves the display mode after 10
seconds.

INFORMATION

If by mistake the value of [3-03] is set higher than the value
of [3-02], the value of [3-03] will always be used.

INFORMATION

 Remark that the b icon will be flashing during setback

operation.

 By default the setback function is enabled.
 The setback function can be combined with the

automatic weather dependent set point operation.

 Setback function is an automatic daily scheduled

function.

Lo Ti

Lo A Hi A T

A

T

t

+ 05

00

– 05

Hi Ti

Shift value

[2-01] [2-02]

B

A

T

t

45°C

40°C

5°C [5-02]

Installation and operation manual

32

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VRV IV System indoor unit

4P325971-1B – 2012.07

11.3.8. Schedule timer operation

In schedule timer operation, the installation is controlled by the
schedule timer. The actions programmed in the schedule timer will be
executed automatically.

The schedule timer is enabled (

p icon displayed) or disabled (p icon

not displayed) by pressing the pr button.

Space cooling

Refer to "Programming space cooling" on page 34.

4 actions can be programmed, these actions are repeated daily.

The space cooling schedule timer can be programmed in 2 different
ways:

 Based on the temperature set point (leaving water temperature

and room temperature).

 Based on the ON/OFF instruction.

The desired method is set through field setting. Refer to "8.3. Field

settings" on page 17 for a detailed description how to set one or more

field settings.
 [0-04] Status: defines whether ON/OFF instruction can be used

in the schedule timer for space cooling.

The implementation and meaning of setting [0-04] and schedule
settings are the same as for heating operation. See "Operation

example: Schedule timer based on temperature set points" on
page 32 and "Operation example: Schedule timer based on ON/OFF
instruction" on page 33.

For cooling, no setback function is available.

11.3.9. Space heating

Refer to "Programming space heating" on page 35.

Four actions per day of the week can be programmed, totalling 28
actions.

The space heating schedule timer can be programmed in 2 different
ways: based on the temperature set point (both leaving water
temperature and room temperature) and based on the ON/OFF
instruction.

The desired method is set through field setting. Refer to the chapter

"8.3. Field settings" on page 17 for a detailed description how to set

one or more field settings.
 [0-03] Status: defines whether ON/OFF instruction can be used

in the schedule timer for space heating.

In the following tables both methods on how to interpret the schedule
timer are shown.

Operation example: Schedule timer based on temperature set
points

When setback function is enabled, the setback operation will have
priority over the scheduled action in the schedule timer.

1 Schedule timer
2 Setback function
3 When both setback function and schedule timer are

enabled

A Setback function

t Time

T Temperature set point

Room temperature
Leaving water temperature

INFORMATION

By default space cooling based on temperature set point
(method 1) is enabled, so only temperature shifts are
possible (no ON/OFF instruction).

INFORMATION

By default space heating based on temperature set point
(method 1) is enabled, so only temperature shifts are
possible (no ON/OFF instruction).

Method 1
[0-03]=1 (default)

Space heating based on temperature set point

(a)

(a) For leaving water temperature and/or room temperature

During operation During schedule imer operation the operation LED is lit

continuously.

When pushing
the y button

The schedule imer for space hea ing will stop and will
not start again.
The controller will be switched off (operation LED will
stop working).

When pushing
the pr button

The schedule timer for space heating will be stopped and
will not start again.
The schedule imer icon will not be displayed anymore.

Method 2
[0-03]=0

Space heating based on ON/OFF instruction

During opera ion When the schedule timer switches space hea ing OFF,

the controller will be switched off (operation LED will stop
working).

When pushing

he y button

The schedule timer for space heating will stop (when
active at that moment) and will start again at the next
scheduled ON function.
The "last" programmed command overrules the
"preceding" programmed command and will remain
active until the "next" programmed command occurs.

Example: imagine he actual time is 17:30 and
actions are programmed at 13:00, 16:00 and
19:00. The "last" programmed command
(16:00) overruled the "previous" programmed
command (13 00) and will remain active until

he "next" programmed command (19:00)

occurs.
So in order to know the actual setting, one should consult
the last programmed command. It is clear that he "last"
programmed command may date from he day before.
Refer to

" Consulting programmed actions" on

page 36

.
The controller will be switched off (operation LED will
stop working).
However he schedule timer icon will stay displayed.

When pushing

he pr button

The schedule imer for space heating will be stopped and
will not start again.
The schedule timer icon will not be displayed anymore.

T

t

6:30 9:00

16:00

0:30

19C 19C 19C

22C

21C

42C 42C 42C

45C

44C

42C

19C 19C 19C

22C

21C

42C 42C

45C

44C

0:30

1

T

t

18C

37C37C

18C

A

5:0023:00 5:0023:00

2

T

t

5:00 9:00

16:00

23:00

19C

18C

19C

22C

21C

42C

40C

42C

45C

44C

40C

19C

18C

19C

22C

21C

42C

19C

19C

42C

19C

42C

19C19C19C

42C

45C

44C

6:30

3

37C37C

40C

40C

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

33

Operation example: Schedule timer based on ON/OFF instruction

When setback function is enabled, the setback operation will have
priority over the scheduled action in the schedule timer if ON
instruction is active. If OFF instruction is active this will have priority
over the setback function. At any time the OFF instruction will have
the highest priority.

1 Schedule timer
2 Setback function
3 When both setback function and schedule timer are

enabled

A Setback function
B ON/OFF instruction

t Time

T Temperature set point

Room temperature
Leaving water temperature

11.3.10. Programming and consulting the schedule timer

Getting started

Programming the schedule timer is flex ble (you can add, remove or
alter programmed actions whenever required) and straightforward
(programming steps are limited to a minimum). However, before
programming the schedule timer, remind:

 Familiarise yourself with the icons and the buttons. You will need

them when programming. Refer to "11.3.2. Name and function

of buttons and icons" on page 28.

 Fill out the form at the very end of this manual. This form can

help you define the required actions for each day.

 Take your time to enter all data accurately.
 Try to program the actions in a chronological way: start with

action 1 for the first action and end with the highest number for
the last action. This is not a requirement but will simplify the
interpretation of the program later.

 If 2 or more actions are programmed for the same day and at the

same time, only the first programmed action will be executed.

Example:

 You can always alter, add or remove the programmed actions

later.

INFORMATION

 When power returns after a power supply failure, the

auto restart function reapplies the user interface
settings at the time of the power supply failure (if time
is shorter than 2 hours). It is therefore recommended
to leave the auto restart function enabled.

 The programmed schedule is time driven. Therefore,

it is essential to set the clock and the day of the week
correctly.

 Refer to "11.3.3. Setting up the controller" on

page 29.

 When the schedule timer is not enabled (p icon not

displayed), schedule timer actions will not be
executed!

 The programmed actions are not stored according to

their timing but according to the time of programming.
This means that the action that was programmed first
gets action number 1, even though it is executed after
other programmed action numbers.

t

18C

40C40C

18C

A

5:0023:00 5:0023:00

2

B

t

9:00

16:00

19C 19C

22C

21C

42C 42C

45C

44C

19C 19C

22C

21C

42C 42C

45C

44C

1

OFF ONON

6:300:30

B

t

6:30 9:00

16:00

23:00

19C 19C

22C

21C

42C 42C

45C

44C

19C 19C

22C

21C

42C 42C

45C

44C

3

OFF ONON

18C

40C40C

18C

Programmed actions Executed actions

Time

(hour)

Temperature

(°C)

Time

(hour)

Temperature

(°C)

1 18:00 — OFF 1 06:00 — 21
2 08:00 — 23 2 08:00 — 23
3 06:00 — 21 3 18:00 — OFF
4 18:00 — 26

Installation and operation manual

34

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Programming

Programming space cooling

Programming space cooling is carried out as follows:

1 Press the < button to enter the programming/consulting mode.

2 Select the operation mode you would like to program by means

of the pi and pj buttons.
The actual mode is blinking.

3 Press the < button to confirm the selected mode.

The time is blinking.

4 Consult the action by means of the pi and pj buttons.

5 Hold down the < button for 5 seconds to program the detailed

actions.
The first programmed action appears.

6 Use the < button to select the action number you would l ke to

program or to modify.

7 Use the pi and pj buttons to set the correct action time.

8 Use the ébi and ébj buttons to set the leaving water

temperature.

9 Use the bi and bj buttons to set the room temperature.

10 Use the ba button to select x to switch cooling and the user

interface off.

11 Repeat steps 6 to 10 to program the other actions.

When all actions have been programmed, make sure that the
display shows the highest action number you would like to save.

12 Press the < button for 5 seconds to store the programmed

actions.
If the < button is pressed when action number 3 is displayed,

actions 1, 2 and 3 are stored but 4 is deleted.
You automatically return to step 5.
By pressing the pr button several times, you return to previous
steps in this procedure and finally return to normal operation.

13 You automatically return to step 5, start again to program the

following day.

5 sec

5 sec

INFORMATION

Returning to previous steps in the programming procedure
without saving modified settings is done by pressing the
pr button.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

35

Programming space heating Programming space heating is carried out as follows:

1 Press the < button to enter the programming/consulting mode.

2 Select the operation mode you would like to program by means

of the pi and pj buttons.
The actual mode is blinking.

3 Press the < button to confirm the selected mode.

The actual day is blinking.

4 Select the day you would like to consult or to program by means

of the pi and pj buttons.
The selected day is blinking.

5 Press the < button to confirm the selected day.

6 Hold down the < button for 5 seconds to program the detailed

actions.
The first programmed action of the selected day appears.

7 Use the < button to select the action number you would l ke to

program or to modify.

8 Use the pi and pj buttons to set the correct action time.

9 Use the ébi and ébj buttons to set the leaving water

temperature.

10 Use the bi and bj buttons to set the room temperature.

11 Use the ba button to select:

- x: to switch heating and the user interface off.

- a: to select automatic temperature calculation for leaving
water temperature

Use the ébi and ébj buttons to set the appropriate
shift value (refer to " Setting the schedule timer" on page 29 for
more information about weather dependent set point).

12 Repeat steps 7 to 11 to program the other actions of the

selected day.
When all actions have been programmed, make sure that the

display shows the highest action number you would l ke to save.

13 Press the < button for 5 seconds to store the programmed

actions.
If the < button is pressed when action number 3 is displayed,

actions 1, 2 and 3 are stored but 4 is deleted.
You automatically return to step 6.
By pressing the pr button several times, you retur

n

to previous

steps in this procedure and finally return to normal operation.

14 You automatically return to step 6, start again to program the

following day.

5 sec

5 sec

INFORMATION

Returning to previous steps in the programming procedure
without saving modified settings is done by pressing the
pr button.

Installation and operation manual

36

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Consulting programmed actions

Consulting space heating/cooling actions

Consulting space cooling heating or space heating is carried out as
follows.

1 Press the < button to enter the programming/consulting mode.

2 Select the operation mode you would like to consult by means of

the pi and pj buttons.
The actual mode is blinking.

3 Press the < button to confirm the selected mode.

The actual day is blinking.

4 Select the day you would l ke to consult by means of the pi

and pj buttons.
The selected day is blinking.

5 Press the < button to confirm the selected day.

The first programmed action of the selected day appears.

6 Use the pi and pj buttons to consult the other

programmed actions of that day.
This is called the readout mode. Empty program actions (e.g. 4)

is not displayed.
By pressing the pr button several times, you return to previous
steps in this procedure and finally return to normal operation.

Tips and tricks

Programming the next day(s)

After confirming the programmed actions of a specific day (i.e. after
pressing the < button for 5 seconds), press the pr button once. You
can now select another day by using the pi and pj buttons
and restart consulting and programming.

Copying programmed actions to next day

In space heating program it is possible to copy all programmed
actions of a specific day to the next day (e.g. copy all programmed
actions from "1" to "2").

To copy programmed actions to the next day, proceed as follows:

1 Press the < button.

The actual mode is blinking.

2 Use the pi and pj buttons to select the mode you want

to program.
The selected mode is blinking.

You can leave programming by pressing the pr button.

3 Press the < button to confirm the selected mode.

The actual day is blinking.

4 Select the day you would like to copy to the next day by means

of the pi and pj buttons.
The selected day is blinking.

Y

ou can retu

rn to step 2 by pressing the pr button.

5 Press the < and pr buttons simultaneously for 5 seconds.

After 5 seconds the display will show the next day (e.g. "2" if
"1" was selected first). This indicates that the day has been
copied.
You can return to step 2 by pressing the pr button.

Deleting one or more programmed actions

Deleting one or more programmed actions is done at the same time
as storing the programmed actions.

When all actions for one day have been programmed, make sure that
the display shows the highest action number you would like to save.
By pressing the < button for 5 seconds, you store all actions except
those with a higher action number than the one that is displayed.

E.g. when the < button is pressed when action number 3 is
displayed, actions 1, 2 and 3 are stored but 4 is deleted.

Deleting a mode

1 Press the

<

button.

The actual mode is blinking.

2 Use the pi and pj buttons to select the mode you want

to delete.
The selected mode is blinking.

3 Press the < and ba button simultaneously for 5 seconds to

delete the selected mode.

Deleting a day of the week

1 Press the < button.

The actual mode is blinking.

2 Use the pi and pj buttons to select the mode you want

to delete.
The selected mode is blinking.

3 Press the < button to confirm the selected mode.

The actual day is blinking.

4 Select the day you would l ke to delete by means of the pi

and pj buttons.
The selected day is blinking.

5 Press the < and ba button simultaneously for 5 seconds to

delete the selected day.

INFORMATION

Returning to previous steps in this procedure is done by
pressing the pr button.

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

37

11.3.11. Operating the optional demand PCB

An optional PCB EKRP1AHTA can be connected to the unit and be
used to remotely control the unit

There are 3 inputs that allow

 Remote thermo on - off.

 Remote unit on - off.

For more details about this option kit, refer to the wiring diagram of
the unit

11.3.12. Operating the optional user interface

If besides the main user interface the optional user interface is
installed as well, the main user interface (master) can access all
settings while the second user interface (slave) can not access
schedule settings and parameter settings.

Refer to the installation manual for more details.

11.4. Field settings

The unit shall be configured by the installer to match the installation
environment (outdoor climate, installed options, etc.) and user
demand. However, the field settings mentioned in "8.3. Field settings"

on page 17 can be modified to customer preferences. Therefore, a

number of so called field settings are available. These field settings
are accessible and programmable through the user interface.

Each field setting is assigned a 3-digit number or code, for example
[1-03], which is indicated on the user interface display. The first digit
[1] indicates the 'first code' or field setting group. The second and
third digit [03] together indicate the 'second code'.

A list of all field settings and default values is given under "8.3. Field

settings" on page 17. In this same list, we provided 2 columns to

register the date and value of altered field settings at variance with
the default value.

11.4.1. Procedure

To change one or more field settings, proceed as follows.

1 Press the z button for a minimum of 5 seconds to enter FIELD

SET MODE.
The $ icon (3) will be displayed. The current selected

field setting code is indicated ; (2), with the set value
displayed to the right - (1).

2 Press the ébi button to select the appropriate field setting

first code.

3 Press the ébj button to select the appropriate field setting

second code.

4 Press the pfi button and pfj button to change

the set value of the select field setting.

5 Save the new value by pressing the pr button.

6 Repeat step 2 through 4 to change other field settings as

required.

7 When finished, press the z button to exit FIELD SET MODE.

NOTICE

The default values mentioned in "8.3. Field settings" on

page 17 are the values from factory. The actual initial

values shall be selected according to your application.
These values shall be confirmed by your installer.

NOTICE

Changes made to a specific field setting are only stored
when the pr button is pressed. Navigating to a new field
setting code or pressing the z button will discard the
change made.

INFORMATION

 Before shipping, the set values have been set as

shown under "8.3. Field settings" on page 17.

 When exiting FIELD SET MODE, "88" may be

displayed on the user interface LCD while the unit
initialises itself.

NOTICE

 When running through the field settings you may

notice that there are some more field settings as there
are mentioned in the "8.3. Field settings" on page 17.

These field settings are not applicable and may
not be changed!

 For more information about installation related setting,

see installation manual of the unit. For settings
different from the default value, contact your installer.

Installation and operation manual

38

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

11.5. Field setting list for Operation Manual

First
code

Second
code

Setting name

Installer setting at variance with default value

Default

value

Range Step UnitDate Va lue Date Value

0 Remote control setup

00

Installation related set ing

(a)

22~31—

01

Installation related set ing

(a)

0 –5~5 0 5 °C

02 Not applicable. Do not change he default value.

1———

03 Status: space heating schedule timer mode

Method 1=1 / Method 2=0.

1 (ON) 0/1 — —

04 Status: space cooling schedule timer mode

Method 1=1 / Method 2=0.

1 (ON) 0/1 — —

1 Settings are not applicable

00 Not applicable. Do not change he default value.

1———

01 Not applicable. Do not change he default value.

1:00 — — —

02 Not applicable. Do not change he default value.

0———

03 Not applicable. Do not change he default value.

15 00 — — —

2 Automatic setback function

00 Status: se back operation.

1 (ON) 0/1 — —

01 Setback operation start time.

23:00 0 00~23:00 1:00 hour

02 Setback operation stop time.

5:00 0 00~23:00 1:00 hour

3 Weather dependent set point

00 Low ambient temperature (Lo_A).

–10 –20~5 1 °C

01 High ambient temperature (Hi_A).

15 10~20 1 °C

02 Set point at low ambient temperature (Lo_Ti).

40 25~80 1 °C

03 Set point at high ambient temperature (Hi_Ti).

25 25~80 1 °C

4 Settings are not applicable

00 Not applicable. Do not change he default value.

1———

01 Not applicable. Do not change he default value.

Fri — — —

02 Not applicable. Do not change he default value.

23 00 — — —

5 Automatic setback and disinfection set point

00 Not applicable. Do not change he default value.

70 — — —

01 Not applicable. Do not change he default value.

10 — — —

02 Leaving water setback temperature.

50~101°C

03 Room setback temperature.

18 17~23 1 °C

04 Not applicable. Do not change he default value.

0———

6 Option setup

01

Installation related set ing

(a)

0 (OFF) 0/2 — —

02

Installation related set ing

(a)

0 (OFF) 0/1 — —

03 Not applicable. Do not change he default value.

0———

8 Option setup

00

Installation related set ing

(a)

1 (ON) 0/1 — —

01 Not applicable. Do not change he default value.

1———

02 Emergency opera ion.

00/1——

03 Not applicable. Do not change he default value.

1———

04

Installation related set ing

(a)

0 0~2 1 —

9 Automatic temperature compensation

00

Installation related set ing

(a)

0 –2~2 0 2 °C

01

Installation related set ing

(a)

1 (ON) 0/1 1 —

02 Not applicable. Do not change he default value.

0———

03

Installation related set ing

(a)

0 –2~2 0 2 °C

04 Not applicable. Do not change he default value.

0———

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

39

A Option setup

00 Not applicable. Do not change he default value.

0———

01 Not applicable. Do not change he default value.

0———

02

Installation related setting

(a)

53~81—

03

Installation related setting

(a)

31~50.5°C

04 Not applicable. Do not change he default value.

0———

b Settings are not applicable

00 Not applicable. Do not change he default value.

35 — — —

01 Not applicable. Do not change he default value.

45 — — —

02 Not applicable. Do not change he default value.

1———

03 Not applicable. Do not change he default value.

70 — — —

04 Not applicable. Do not change he default value.

70 — — —

C Leaving water temperature limits

00

Installation related setting

(a)

45 37~45 1 °C

01

Installation related setting

(a)

25 25~37 1 °C

02

Installation related setting

(a)

20 18~22 1 °C

03

Installation related setting

(a)

10 5~18 1 °C

04 Not applicable. Do not change he default value.

0———

d Settings are not applicable

00 Not applicable. Do not change he default value.

10 — — —

01 Not applicable. Do not change he default value.

30 — — —

02 Not applicable. Do not change he default value.

15 — — —

03 Not applicable. Do not change he default value.

15 — — —

04 Not applicable. Do not change he default value.

40 — — —

E Service mode

00 Not applicable. Do not change he default value.

0———

01 Not applicable. Do not change he default value.

0———

02 Not applicable. Do not change he default value.

0———

03 Not applicable. Do not change he default value.

1———

04

Installation related setting

(a)

00~251—

F Settings are not applicable

00

Installation related setting

(a)

53~81—

01 Not applicable. Do not change he default value.

0———

02 Not applicable. Do not change he default value.

1———

03 Not applicable. Do not change he default value.

10 — — —

04 Not applicable. Do not change he default value.

50 — — —

(a) For more information about installation related settings, see Installation Manual of the indoor unit. For settings different from the default value, contact your installer.

First
code

Second
code

Setting name

Installer setting at variance with default value

Default

value

Range Step UnitDate Valu e Date Val ue

Installation and operation manual

40

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

12. Maintenance

12.1. Important information regarding the refrigerant
used

This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol.

Refrigerant type: R410A
GWP

(1)

value: 1975

(1)

GWP = global warming potential

Periodical inspections for refrigerant leaks may be required
depending on the applicable legislation. Please contact your local
dealer for more information.

12.2. Maintenance activities

In order to ensure optimal readiness of the unit, a number of checks
and inspections on the unit and the field wiring have to be carried out
at regular intervals, preferably yearly. This maintenance should be
carried out by your local Da kin technician (see installation manual).

The only maintenance which may be required by the operator is:

 Keeping the user interface clean by means of a soft damp cloth.
 Checking if the water pressure indicated on the manometer is

above 1 bar.

13. Troubleshooting

The guidelines below might help to solve your problem. If you cannot
solve the problem, consult your installer.

13.1. Malfunction codes list

When a safety device is activated, the user interface LED will be
flashing, and a malfunction code will be displayed.

A list of malfunctions and corrective actions can be found in

"8.6.2. Malfunction codes list" on page 25.

Reset the safety by pushing the y button.

In case this procedure for resetting the safety is not successful,
contact your local dealer.

For other malfunction codes which may be displayed during the
system test run or operation, see the installation manual of the
outdoor unit.

14. Technical Data

14.1. Piping diagram

a Shut off valve with drain/fill valve (field installed)
b Expansion vessel
c Water filter
d Safety valve (3 bar)
e Manometer

f Pump (MP1)
g Plate heat exchanger
h Flowswitch (S1L)

i Airpurge

j Expansion valve (K1E)
k Refrigerant filter

l Liquid refrigerant piping

m Gas refrigerant piping
R1T Leaving water thermistor
R2T Return water thermistor
R3T Liquid thermistor
R4T Gas thermistor

Cooling
Hea ing

WARNING

If the supply cord is damaged, it must be replaced by the
manufacturer, its agent or similar qualified persons in order
to avoid hazards.

Possible causes Corrective actions

No readings on the user interface
(blank display)

Check if the main power is still
connected to your installation.

One of the malfunction codes
appears

Consult your local dealer.
Refer to the installation manual or
below table for a detailed list of
malfunc ion codes.

The schedule timer does work but
the programmed actions are
executed at the wrong time.
(e.g. 1 hour too late or too early)

Check if the clock and the day of the
week are set correctly, correct if
necessary.

The schedule timer is programmed
but does not work.

In case the pr icon is not displayed,
push he pr button to enable the
schedule imer.

Capacity shortage Consult your local dealer.

a

R1T

R2T R3T

R4T

a b c d e f k k lj

i h g k m

g

j

R3T

c

R4T

d

k

k

k

R2T

i hb R1T

ea mlaf

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

41

14.2. Wiring diagram

The abbreviations used are listed below:

A1P........................ Main PCB (master)

A2P........................ User interface PCB

A3P........................ Control PCB

A4P.................*..... Demand PCB

A5P.................*..... Remote user interface PCB

A6P.................*..... Thermostat PCB

A7P.................*..... Receiver PCB

C1-C3 .................... Filter capacitor

F1U (A*P) .............. Fuse (T, 3.15 A, 250 V)

HAP (A*P).............. PCB LED

K1E........................ Electronic expansion valve

K*R (A3P).............. PCB relay

M1P ....................... Pump

PC (A7P) ........*..... Power circuit

PS (A1P)................ Switching power supply

Q*D1.............. #..... Earth leakage circuit breaker

R1H (A6P) ......* ..... Humidity sensor

R1T........................ Leaving water thermistor

R1T (A6P).......* ..... Ambient sensor

R2T........................ Return water thermistor

R2T.................*..... External sensor (floor or ambient)

R3T........................ Refrigerant liquid thermistor

R4T........................ Refrigerant gas thermistor

S1L ........................ Flow switch

S1S................ #..... Thermostat input 1

S2S................ #..... Thermostat input 2

S3S................ # ..... Operation ON input

S4S................ #..... Operation OFF input

SS1 (A1P).............. Selector switch (emergency)

(EMG. = emergency, NORM. = normal)

SS1 (A2P).............. Selector switch (main (M)/sub (S))

SS1 (A5P)...... * ..... Selector switch (main (M)/sub (S))

T1R........................ Diode bridge

V1C-V2C ............... Ferrite core noise filter

X*A (A*P)............... PCB connector

X1M ....................... Terminal strip for high voltage field wiring

X2M ....................... Terminal strip for low voltage field wiring

X*M (A*P) ...... *..... PCB terminal strip

Z1F (A1P ............... Noise filter

* Field installed option

# Field supplied

Colours

BLK........................ Black

BLU........................ Blue

BRN ....................... Brown

ORG ...................... Orange

RED ....................... Red

WHT ...................... White

YLW....................... Yellow

Notes

PC

LNX2M C

COM

X1M H

%H20 R1H

X1M

X1M

only for EKRTR* only for EKRTETS

only for EKRTW*

1

C

COM

H

1

A6P

A6P

A7P

X801M 4 5123

A4P

1

A1P

WHT

YLW

ORG

BLU

RED

BRN

BLU

BRN

RED

BLK

WHT

T1R

Z1F PS

HAP

SS1

NORM

EMG

HAP

3
4

X1M

5
6

X1M

X1M

11
12

Cooling / heating output:
max 0 3A, 230V AC

Operation on/off output:
max 0 3A, 230V AC

Error output:
max 0 3A, 230V AC

LX1M N

5

X2M

6

A3P

only for EKBUH*

X2M 4 5 123

NL

1~50Hz 220 240 VAC

power supply

User interface

P1
P2

F1
F2

X2M

P1

X2M

P2

Remote user
interface

P1
P2

only for EKRUAHT*

V2C
N 2

V1C
N 1

SS1
S
M

SS1

S

M

A2P

A5P

F1F2 communication:
see outdoor unit for
more details

only for EKRP1AHT*

X2M

7

X1M

8 9

X1M

10

NL

1~50Hz 220 240 VAC

power supply

R1T

t°

R1T

t°

R2T

t°

X80A:1

2 3 4 5 6 7 8 9 10 11 12

S1S S2S S3S S4S

X18A:1

2

X12A:1

2

X17A:1

2

X7A 1 2 3

4

5

K1E

M

X20A:1 2 3

4

6

M1P

MS

3~

6

7

3

NE

X27A:(L) 1

(N) 3

5

5

8

F1U

R3T

t°

R2T

t°

R1T

t°

C3

X16A:1

2 3

R4T

t°

4

C1

C2

X8A:1 2

K6R

S1L

X1A:1

2
3

4

F1U

X23A:1

2

3

4

X7A:1

2

K5R

K7R

2

K2R

X4A:1

Q1DI

X30A:1

2

3

4

5

6

7

8

X70A:1

2

2

X35A:1

X15A:1

2

2

X10A:1

2

X16A:1

X14A:1

2

X15A:1

2

2

K3R

X5A:1

2

K1R

X3A:1

3 4

Q2DI

X85A:1 2 3 4 5 6

only for *** only for ***

power supply power supply

Cooling/heating output: Cooling/heating output:

Operation on/off output: Operation on/off output:

Error output: Error output:

F1F2 communication:
see outdoor unit for more details

F1F2 communication:
see outdoor unit for more details

User interface User interface

Remote user interface Remote user interface

Installation and operation manual

42

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

14.3. Electrical components box

a A1P: main PCB
b A3P: control PCB
c A4P: optional demand PCB
d X2M: terminal strip
e X1M: terminal strip

14.4. Operation range HXY(080/125)

Cooling operation

a Outdoor Ta (°CDB/WB)
b Indoor (LWE°C)
c Pull down area
d Normal opera ion range

(*) Depending on opera ion conditions and only possible after field setting

activa ion (influence on DX cooling (cold draft) and total efficiency).

Heating operation

a Outdoor Ta (°CDB/WB)
b Indoor (LWC°C)
c Warming up zone
d Normal operation range

14.5. ESP curve

ESP External Static Pressure

Flow Waterflow through the unit

Unit ESP at 4000 rpm (∆T=5°C)
Unit ESP at 3800 rpm (∆T=8°C)
Maximum ESP if ∆T=5°C (heating nominal)
Maximum ESP if ∆T=5°C (cooling nominal)

NOTICE

When LWE is selected <18°C; optional drain pan has to be
used for Hydrobox.

a

c

b

d
e

ae

cd

b

10/8

(5*) 10 20 25

35/30

43/(37)

20/16

7/6

2/1

7/ 8

20/X

4525

a

b

5

c d

25.0

30.0

35.0

40.0

45.0

50.0

55.0

60.0

65.0

70.0

75.0

80.0

85.0

90.0

15 17.5 20 22.5 25 27.5 30 32.5 35 37.5 40

ESP (kPa)

Flow (l/min)

HXY080+125A7V1B

VRV IV System indoor unit

4P325971-1B – 2012.07

Installation and operation manual

43

14.6. Technical specifications table 14.7. Electrical specifications table

15. Disposal requirements

Dismantling of the unit, treatment of the refrigerant, of oil and of other
parts must be done in accordance with the applicable legislation.

Do not try to dismantle the system yourself: the dismantling of the
system, treatment of the refrigerant, of oil and other parts must be
done by a qualified installer in accordance with the applicable
legislation.

Units must be treated at a specialized treatment facility for re-use,
recycling and recovery. By ensuring this product is disposed off
correctly, you will help to prevent potential negative consequences for
the environment and human health. Please contact the installer or
local authority for more information.

HXY080A7V1B HXY125A7V1B

Nominal cooling capacity

•Heating

(a)

(a) DB/WB 7°C/6°C - LWC 35°C (DT=5°C)

kW 9 14

• Cooling

(b)

(b) Tamb 35°C - LWE 18°C (DT=5°C)

kW 8 12 5

Casing

• Colour White

• Material Pre-coated sheetmetal

Dimensions

• Packing
(height x wid h x depth)

mm 415 x 650 x 1016

•Unit
(height x wid h x depth)

mm 890 x 480 x 344

Weight of unit

• Machine net weight kg 44

• Packed machine weight kg 47

Packing materials

• Material Carton / EPS / PP (straps)

• Weight kg 2,8

PED

• Category of unit Art 3§3

(c)

(c) Excluded from scope of PED due article 1, item 3.6 of 97/23/EC

Pump

Type DC motor
Number of speed Inverter controlled
Nominal ESP unit

• Cooling

(b)

kPa 83 55

•Heating

(a)

kPa 79 43

Power input W 110 135

Water side Heat exchanger

Type Brazed plate
Quantity 1
Minimal water flow rate

(d)

(d) Flow switch setting

l/min 15

Nominal water flow rate

• Cooling

(a)

l/min 22.9 35 8

•Heating

(e)

(e) The sound pressure level is measured at 1 m from the unit. It is a relative value,

depending on the distance and acoustic environment.

l/min 25.8 40.1

Insula ion material Elastomeric foam

Expansion vessel

Volume l10
Maximum water pressure bar 3
Pre-pressure bar 1

Water filter

Diameter perforations mm 1
Material

• Body Copper and brass

• Filter element Stainless steel

Water circuit

• Piping connections
diameter

(f)

(f) Value mentioned is connection after ball valves. Connection at unit is

G 1-1/4” female.

inch G 1-1/4” (female)

• Safety valve bar 3

• Manometer Yes

• Drain/fill valve Yes

• Shut off valves Yes

• Flow switch Yes

• Air purge valve Yes

Refrigerant circuit

• Gas side diameter mm 15.9

• Liquid side diameter mm 9.52

• Piping length restrictions See installation manual of the outdoor

unit and technical engeneering data

Sound level

• Sound power

(b)

dBA

• Sound pressure

(e)

dBA

Operation range

• Ambient space cooling °C 10~43

• Ambient space heating °C –20~20

• Waterside space cooling °C (5)10~20

• Waterside space heating °C 25~45

HXY080A7V1B HXY125A7V1B

Power supply

• Phase 1

• Frequency Hz 50

• Voltage V 220~240

Current

• Running current A2.5

•Z

max

Ω —

• Minimum Ssc value kVA —

Fuse

• Recommended fuse A6~16

Voltage range

• Minimum V 198

•Maximum V 264

Wiring connections

• For power
supply

• Quantity of
wires

3G

• Type of wires Wire type/size has to be selected

according to applicable legislation

• Communication
cable (F1F2)

• Quantity of
wires

2

• Type of wires 0.75~1.25 mm

2

• User interface
(P1P2)

• Quantity of
wires

2

• Type of wires 0.75~1.25 mm

2

4P325971-1B 2012.07

Copyright 2012 Daikin