Daikin HXHD125A8V1B Installation manuals

INSTALLATION MANUAL

system indoor unit

HXHD125A8V1B

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ATITIKTIES-DEKLARACIJA

ATBILSTĪBAS-DEKLARĀCIJA

VYHLÁSENIE-ZHODY

CE -

CE -

CE -

CE - UYUMLULUK-BEYANI

ZJAVA O SKLADNOSTI

VASTAVUSDEKLARATSIOON

ДЕКЛАРАЦИЯ-ЗА-СЪОТВЕТСТВИЕ

CE - I

CE -

CE -

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

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

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IZJAVA-O-USKLAĐENOSTI

DEKLARACJA-ZGODNOŚCI

DECLARAŢIE-DE-CONFORMITATE

CE - MEGFELELŐSÉGI-NYILATKOZAT

CE -

CE -

CE -

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

kinnitab oma täielikul vastutusel, et käesoleva deklaratsiooni alla kuuluv varustus:

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

ar pilnu atbildību apliecina, ka tālāk aprakstītās iekārtas, uz kurām attiecas šī deklarācija:

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

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

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tamamen kendi sorumluluğunda olmak üzere bu bildirinin ilgili olduğu donanımının aşağıdaki gibi olduğunu beyan eder:

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megfelelnek az alábbi szabvány(ok)nak vagy egyéb irányadó dokumentum(ok)nak, ha azokat előírás szerint használják:

spełniają wymogi następujących norm i innych dokumentów normalizacyjnych, pod warunkiem że używane są zgodnie z naszymi

instrukcjami:

sunt în conformitate cu următorul (următoarele) standard(e) sau alt(e) document(e) normativ(e), cu condiţia ca acestea să fie utilizate în

conformitate cu instrucţiunile noastre

skladni z naslednjimi standardi in drugimi normativi, pod pogojem, da se uporabljajo v skladu z našimi navodili:

on vastavuses järgmis(t)e standardi(te)ga või teiste normatiivsete dokumentidega, kui neid kasutatakse vastavalt meie juhenditele:

съответстват на следните стандарти или други нормативни документи, при условие, че се използват съгласно нашите

инструкции:

atitinka žemiau nurodytus standartus ir (arba) kitus norminius dokumentus su sąlyga, kad yra naudojami pagal mūsų nurodymus:

tad, ja lietoti atbilstoši ražotāja norādījumiem, atbilst sekojošiem standartiem un citiem normatīviem dokumentiem:

sú v zhode s nasledovnou(ými) normou(ami) alebo iným(i) normatívnym(i) dokumentom(ami), za predpokladu, že sa používajú v súlade

s našim návodom:

ürünün, talimatlarımıza göre kullanılması koşuluyla aşağıdaki standartlar ve norm belirten belgelerle uyumludur:

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Direktive z vsemi spremembami.

Direktiivid koos muudatustega.

Директиви, с техните изменения.

Direktyvose su papildymais.

Direktīvās un to papildinājumos.

Direktiver, med senere ændringer.

Direktiv, med företagna ändringar.

Direktiver, med foretatte endringer.

Direktiivejä, sellaisina kuin ne ovat muutettuina.

v platném znění.

Directives, as amended.

Direktiven, gemäß Änderung.

Directives, telles que modifiées.

Richtlijnen, zoals geamendeerd.

Directivas, según lo enmendado.

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Smernice, v platnom znení.

Değiştirilmiş halleriyle Yönetmelikler.

<A> DAIKIN.TCF.025H7/03-2015

<B> DEKRA (NB0344)

v

<B>

<B>

pozitīvajam

<C> Sertifikasına

Smjernice, kako je izmijenjeno.

и оценено

irányelv(ek) és módosításaik rendelkezéseit.

z późniejszymi poprawkami.

Directivelor, cu amendamentele respective.

<A>

както е изложено в

<B>

a pozitívne zistené

съгласно

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положително от

sertifikātu <C>

<A>

ir kaip teigiamai nuspręsta

un atbilstoši

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osvedčením <C>

Sertifikatą <C>

vērtējumam saskaņā ar

súlade s

pagal

Cертификата <C>

kaip nustatyta

kā norādīts

ako bolo uvedené v

‘da belirtildiği gibi ve

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Not

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v

Direttive, come da modifica.

√‰ËÁÈÒv, fiˆ˜ ¤¯Ô˘Ó ÙÚÔÔÔÈËı›.

Directivas, conforme alteração em.

Директив со всеми поправками.

igazolta a megfelelést,

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szerint.

alapján, a(z)

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a(z)

a(z)

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, pozytywną opinią

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Świadectwem <C>

zgodnie z dokumentacją

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<A>

şi apreciat pozitiv

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aşa cum este stabilit în

sertifikaadile <C>

Certificatul <C>

in odobreno s strani

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järgi vastavalt

certifikatom <C>

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în conformitate cu

<B>

de

kiidetud

kot je določeno v

nagu on näidatud dokumendis

skladu s

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<C> 2082543.0551-QUA/EMC

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PROHLÁŠENÍ-O-SHODĚ

CE - ERKLÆRING OM-SAMSVAR

CE - ILMOITUS-YHDENMUKAISUUDESTA

CE -

заявляет, исключительно под свою ответственность, что оборудование, к которому относится настоящее заявление:

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

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

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

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CE - DECLARAÇÃO-DE-CONFORMIDADE СЕ - ЗАЯВЛЕНИЕ-О-СООТВЕТСТВИИ

CE - OPFYLDELSESERKLÆRING

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CE - ¢H§ø™H ™YMMOPºø™H™

CE - DECLARACION-DE-CONFORMIDAD

CE - DICHIARAZIONE-DI-CONFORMITA

la declaración:

referencia

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estão em conformidade com a(s) seguinte(s) norma(s) ou outro(s) documento(s) normativo(s), desde que estes sejam utilizados de

acordo com as nossas instruções:

соответствуют следующим стандартам или другим нормативным документам, при условии их использования согласно нашим

инструкциям:

overholder følgende standard(er) eller andet/andre retningsgivende dokument(er), forudsat at disse anvendes i henhold til vore

instrukser:

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

förutsättning att användning sker i överensstämmelse med våra instruktioner:

respektive utstyr er i overensstemmelse med følgende standard(er) eller andre normgivende dokument(er), under forutssetning av at

disse brukes i henhold til våre instrukser:

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mukaisesti:

za předpokladu, že jsou využívány v souladu s našimi pokyny, odpovídají následujícím normám nebo normativním dokumentům:

u skladu sa slijedećim standardom(ima) ili drugim normativnim dokumentom(ima), uz uvjet da se oni koriste u skladu s našim uputama:

Machinery 2006/42/EC

Electromagnetic Compatibility 2004/108/EC

ob upoštevanju določb:

vastavalt nõuetele:

следвайки клаузите на:

laikantis nuostatų, pateikiamų:

ievērojot prasības, kas noteiktas:

održiavajúc ustanovenia:

bunun koşullarına uygun olarak:

under iagttagelse af bestemmelserne i:

enligt villkoren i:

gitt i henhold til bestemmelsene i:

noudattaen määräyksiä:

za dodržení ustanovení předpisu:

prema odredbama:

követi a(z):

zgodnie z postanowieniami Dyrektyw:

în urma prevederilor:

Notă *

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on

<B>

ja jotka

enligt

<B>

och godkänts av

<A>

enligt

11 Information *

e giudicato positivamente

<A>

delineato nel

mukaisesti.

<A>

Sertifikat <C>

og gjennom positiv

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ifølge

<B>

Sertifikaatin <C>

hyväksynyt

Certifikatet <C>

som det fremkommer i

jotka on esitetty asiakirjassa

bedømmelse av

12 Merk *

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Certificado <C>

¶ИЫЩФФИЛЩИОfi <C>

e com o parecer

Î·È ÎÚ›ÓÂÙ·È ıÂÙÈο

<A>

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Certificato <C>

de acordo com o

Û‡Ìʈӷ Ì ÙÔ

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secondo il

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·fi ÙÔ

tal como estabelecido em

da

positivo de

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06 Nota *

08 Nota

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positiv

<B>

<C>

<C>

et évalué positivement par

Certificat <C>

<A>

Certificate

and judged positively by

Zertifikat

aufgeführt und von

<A>

<A>

conformément au

according to the

as set out in

wie in der

tel que défini dans

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beurteilt gemäß

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prema

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strane

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<B>

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∏ Daikin Europe N.V. Â›Ó·È ÂÍÔ˘ÛÈÔ‰ÔÙË̤ÓË Ó· Û˘ÓÙ¿ÍÂÈ ÙÔÓ ∆¯ÓÈÎfi Ê¿ÎÂÏÔ Î·Ù·Û΢‹˜.

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Shigeki Morita

Director

Ostend, 1st of June 2015

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

erklärt auf seine alleinige Verantwortung, dass die Ausrüstung für die diese Erklärung bestimmt ist:

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

verklaart hierbij op eigen exclusieve verantwoordelijkheid dat de apparatuur waarop deze verklaring betrekking heeft:

declara bajo su única responsabilidad que el equipo al que hace

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

‰ЛПТУВИ МВ ·ФОПВИЫЩИО‹ ЩЛ˜ В˘ı‡УЛ fiЩИ Ф ВНФПИЫМfi˜ ЫЩФУ ФФ›Ф ·У·К¤ЪВЩ·И Л ·ЪФ‡Ы· ‰‹ПˆЫЛ:

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CE - DECLARATION-OF-CONFORMITY

CE - KONFORMITÄTSERKLÄRUNG

CE - DECLARATION-DE-CONFORMITE

CE - CONFORMITEITSVERKLARING

Daikin Europe N.V.

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

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HXHD125A8V1B

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

instructions:

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

daß sie gemäß unseren Anweisungen eingesetzt werden:

sont conformes à la/aux norme(s) ou autre(s) document(s) nor matif(s), pour autant qu'ils soient utilisés conformément à nos instructions:

conform de volgende norm(en) of één of meer andere bindende documenten zijn, op voorwaarde dat ze worden gebruikt overeenkomstig

onze instructies:

están en conformidad con la(s) siguiente(s) norma(s) u otro(s) documento(s) normativo(s), siempre que sean utilizados de acuerdo con

nuestras instrucciones:

sono conformi al(i) seguente(i) standard(s) o altro(i) documento(i) a carattere normativo, a patto che vengano usati in conformità alle

nostre istruzioni:

В›У·И Ы‡МКˆУ· МВ ЩФ(·) ·ОfiПФ˘ıФ(·) ЪfiЩ˘Ф(·) ‹ ¿ППФ ¤ББЪ·КФ(·) О·УФУИЫМТУ, ˘fi ЩЛУ ЪФ¸fiıВЫЛ fiЩИ ¯ЪЛЫИМФФИФ‡УЩ·И

Û‡Ìʈӷ Ì ÙȘ Ô‰ËÁ›Â˜ Ì·˜:

following the provisions of:

gemäß den Vorschriften der:

conformément aux stipulations des:

overeenkomstig de bepalingen van:

EN60335-2-40,

siguiendo las disposiciones de:

secondo le prescrizioni per:

Ì ًÚËÛË Ùˆv ‰È·Ù¿Íˆv Ùˆv:

de acordo com o previsto em:

в соответствии с положениями:

01 Note *

02 Hinweis *

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04 Bemerk *

05 Nota

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

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

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

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

Daikin Europe N.V. está autorizado a compilar el Archivo de Construcción Técnica.

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Daikin Europe N.V. è autorizzata a redigere il File Tecnico di Costruzione.

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3P402254-5

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01

HXHD125A8V1B

VRV IV system indoor unit

Installation manual

CONTENTS Page

1. Definitions ..................................................................................2

1.1. Meaning of warnings and symbols .................................................2

1.2. Meaning of used terms...................................................................2

2. General Safety precautions .......................................................2

3. Introduction ................................................................................ 3

3.1. General information........................................................................ 3

3.2. Combination and options................................................................3

3.3. Scope of the manual...................................................................... 3

3.4. Model identification.........................................................................3

4. Accessories ...............................................................................4

4.1. Accessories supplied with this unit.................................................4

5. Overview of unit .........................................................................4

5.1. Opening the unit............................................................................. 4

5.2. Main components in the unit.......................................................... 5

5.3. Switch box main components......................................................... 7

6. Design of the water circuit..........................................................7

6.1. Selection of the type of heat emitters............................................. 7

6.2. General precautions concerning water circuit................................ 8

6.3. Application examples ..................................................................... 9

Floor heating without domestic hot water tank............................... 9

Radiator with domestic hot water tank ...........................................9

Fan coils without domestic hot water tank...................................... 9

Application example with several heat emitters............................10

7. Installation of the unit............................................................... 10

7.1. Selecting an installation location.................................................. 10

General precautions on installation location................................. 10

7.2. Dimensions and service space ....................................................11

Dimensions of unit........................................................................ 11

Service space of the unit.............................................................. 12

7.3. Inspecting, handling and unpacking the unit ................................12

7.4. Installing the unit.......................................................................... 12

Preparation before installation on final installation place .............12

Installation on final installation position ........................................ 14

Connecting the water circuit......................................................... 14

Fix the indoor unit refrigerant connections ................................... 15

Close the unit ...............................................................................15

7.5. Leak test and vacuuming drying R410A circuit ............................16

7.6. Water piping .................................................................................16

Checking the water volume and expansion

vessel pre-pressure...................................................................... 16

Setting the pre-pressure of the expansion vessel ........................ 17

Charging water............................................................................. 17

8. Electrical wiring work ...............................................................18

8.1. Precautions on electrical wiring work........................................... 18

8.2. Internal wiring – Parts table..........................................................19

8.3. System overview of field wiring ....................................................19

8.4. Requirements............................................................................... 20

8.5. Routing......................................................................................... 20

8.6. Connection................................................................................... 21

Installation and connection of the remote controller..................... 21

Connection to a benefit kWh rate power supply........................... 22

9. Start-up and configuration .......................................................24

9.1. Pre-operation checks ................................................................... 24

9.2. Final air purging............................................................................24

9.3. Field settings................................................................................ 24

9.4. Procedure.....................................................................................25

9.5. Detailed description......................................................................25

9.6. Simultaneous demand of space heating and domestic water

heating.......................................................................................... 32

9.7. Multiple set point control...............................................................36

9.8. Field setting table .........................................................................38

10. Final check and test run........................................................... 40

10.1. Final check................................................................................... 40

Multi tenant power supply check .................................................. 40

10.2. System test run ............................................................................ 40

10.3. Indoor unit individual test run ....................................................... 40

Temperature read-out mode......................................................... 40

Procedure for space heating ........................................................ 40

Procedure for domestic water heating.......................................... 41

11. Maintenance and service .........................................................41

11.1. Maintenance activities.................................................................. 41

Checks .........................................................................................42

11.2. Important information regarding the refrigerant used................... 42

11.3. Vacuuming/recovery and maintenance on refrigerant side ..........43

System overview .......................................................................... 44

Recovery/vacuuming overview for 1 indoor unit maintenance

(R410A circuit connections) .........................................................44

12. Troubleshooting........................................................................44

12.1. General guidelines ....................................................................... 44

12.2. Opening the unit........................................................................... 44

12.3. Draining the system......................................................................45

12.4. General symptoms....................................................................... 45

12.5. Error codes................................................................................... 45

13. Unit specifications ....................................................................46

Technical specifications................................................................ 46

Electrical specifications: power supply......................................... 46

Electrical specifications: multi tenant power supply......................46

Thank you for purchasing this product.
The original instructions are written in English. All other languages

are translations of the original instructions.

CAREFULLY READ THESE INSTRUCTIONS BEFORE
INSTALLATION. THEY WILL TELL YOU HOW TO INSTALL
AND HOW TO CONFIGURE THE UNIT PROPERLY.
KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE
REFERENCE.

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

1

1. DEFINITIONS

1.1. Meaning of warnings and symbols

Warnings in this manual are classified according to their severity and
probability of occurrence.

DANGER

Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.

WARNING

Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also
be used to alert against unsafe practices.

NOTICE

Indicates situations that may result in equipment or
property-damage accidents only.

INFORMATION

This symbol identifies useful tips or additional information.

Some types of danger are represented by special symbols:

Electric current.

Danger of burning and scalding.

1.2. Meaning of used terms

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.

Maintenance instructions:

Instruction manual specified for a certain product or application,
which explains (if relevant) how to install, configure, operate and/or
maintain the product or application.

Dealer:

Sales distributor for products as per the subject of this manual.

Installer:

Technical skilled person who is qualified to install products as per the
subject of this manual.

User:

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

Service company:

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

Applicable legislation:

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

Accessories:

Equipment which is delivered with the unit and which needs to be
installed according to instructions in the documentation.

Optional equipment:

Equipment which can optionally be combined to the products as per
the subject of this manual.

Field supply:

Equipment which needs to be installed according to instructions in
this manual, but which are not supplied by Daikin.

2. GENERAL SAFETY PRECAUTIONS

The precautions listed here are divided into the following four types.
They all cover very important topics, so be sure to follow them
carefully.

DANGER: ELECTRICAL SHOCK

Switch off all power supply before removing the switchbox
service panel or before making any connections or
touching electrical parts.

Do not touch any switch with wet fingers. Touching a switch
with wet fingers can cause electrical shock. Before
touching electrical parts, turn off all applicable power
supply.

To avoid electric shock, be sure to disconnect the power
supply 1 minute or more before servicing the electrical
parts. Even after 1 minute, always measure the voltage at
the terminals of main circuit capacitors or electrical parts
and, before touching, be sure that those voltages are
50 V DC or less.

When service panels are removed, live parts can easily be
touched by accident. Never leave the unit unattended
during installation or servicing when the service panel is
removed.

DANGER: DO NOT TOUCH PIPING AND INTERNAL
PA RT S

Do not touch the refrigerant piping, water piping or internal
parts during and immediately after operation. The piping
and internal parts may be hot or cold depending on the
working condition of the unit.

Your hand may suffer burns or frostbite if you touch the
piping or internal parts. To avoid injury, give the piping and
internal parts time to return to normal temperature or, if
you must touch them, be sure to wear protective gloves.

Installation manual

2

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04

3. INTRODUCTION

3.1. General information

This installation manual concerns VRV IV indoor unit air to water
inverter heat pump units of the Daikin HXHD125 series.

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

The unit is designed for floor standing heating operation.
HXHD125 units have a heating capacity of 14 kW.
The indoor units are designed to work in heating mode at indoor

ambient temperatures from 5°C to 30°C.
During heating operation, the unit can heat up the water to

temperatures of 25°C to 80°C.

3.2. Combination and options

The HXHD125 units can only be combined with an outdoor REYQT
unit.

During heating operation, the unit can be combined with space
heating radiators (field supply), fan coil units (option or field supply) or
floor heating (field supply).

The remote controller with room thermostat functionality is standard
supplied with this unit to control your installation.

Domestic hot water tank (option)

An optional EKHTS(U)200AC or EKHTS(U)260AC domestic hot
water tank can be connected to the indoor unit. The domestic hot
water tank has a water volume of 200 l or 260 l.

Refer to the domestic hot water tank installation manual for further
details.

NOTICE

In case there is no instruction in the EKHTS(U)*AC
installation manual on how to connect the domestic hot
water tank to the HXHD125 unit, please follow the same
instruction as explained for the connection of the domestic
hot water tank to the EKHVMRD unit.

Heat pump convector (option)

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

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

Remote controller (option)

An optional secondary EKRUAHT remote controller (with room
thermostat functionality) can be connected to the indoor unit.
Purpose is to provide the possibility to install the standard remote
controller near the unit (for service reasons), and install another
remote controller in another place (e.g. living room) to operate your
installation.

Refer to "Installation and connection of the remote controller" on

page 21 for further details.

Room thermostat (option)

An optional room thermostat EKRTR or EKRTW can be connected to
the indoor unit.

Refer to the room thermostat installation manual for further details.

Digital I/O PCB (option)

An optional EKRP1HBAA digital I/O PCB can be connected to the
indoor unit and be used to remotely monitor your system. This
address card offers 2 voltage free outputs and 1 high voltage
(230 V AC) output.

Refer to the operation manual of the indoor unit and to the digital I/O
PCB installation manual for more information.

Refer to the wiring diagram or connection diagram for connecting this
PCB to the unit.

Demand PCB (option)

An optional EKRP1AHTA demand PCB can be connected to the
indoor unit. This PCB is needed when Daikin room thermostat
EKRTR or EKRTW is installed or when multiple set point control is
used, 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.

3.3. 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 HXHD125 unit. This manual has been prepared to
ensure adequate maintenance of the unit, and it will provide help if
problems occur.

INFORMATION

Refer to the installation manual of the outdoor unit for items
not described in this manual.

The operation of the indoor unit is described in the indoor
unit operation manual.

3.4. Model identification

H X H D 125 A8 V1 B

For European market

1N~, 220-240 V, 50 Hz

Series

Identification of the unit capacity

Refrigerant R134a

High temperature floorstanding

Inverter

Hydro box

INFORMATION

If this option is installed it is not possible to use the remote
controller thermostat function.

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

3

4. ACCESSORIES

1

5. OVERVIEW OF UNIT

4.1. Accessories supplied with this unit

Following accessories can be found in the unit.

12 31x46

1x 6x1x 1x 1x1x

9101x11

1x2x

1x121x

85

8x74x

13

+

14 15 16 17

1x 6x 3x 2x

1 Installation manual
2 Operation manual
3 Addendum installation manual
4 Wiring diagram
5 User interface kit (remote controller, 4 fixing screws, 2

plugs)

6 Stop valve fixing screws (6 screws)
7 Top plate fixing screws + sound bottom plate fixing screws

+ lifting fixing screws (8 screws)

8 Grommet (small)

9 Grommet (large)
10 Top plate insulation
11 Kit for lifting the unit
12 Flexible water outlet piping
13 Flexible water inlet piping (with manometer)
14 Support plate
15 Piping
16 Stop valves
17 Piping fixation clamps

5.1. Opening the unit

To gain access to the unit, top plate, the drip plates and the front
plate need to be opened.

1

1

20x

2

2

2

2

5

5

4

4

4

4

3

3

1 Top plate
2 Drip plate
3 Front plate
4 Sound plate
5 Side plate

Once the unit is opened, access is possible to the main components.
To gain access to the electrical components, switch box needs to be

opened:

4x

5

5

Installation manual

4

DANGER: ELECTRICAL SHOCK

See "2. General Safety precautions" on page 2.

DANGER: DO NOT TOUCH PIPING AND INTERNAL
PA RT S

See "2. General Safety precautions" on page 2.

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04

5.2. Main components in the unit

16

15

4

6
5
3

1

2

10

16

8
7

11

9

15
14

12

1 R134a accumulator
2 R134a compressor
3 R134a discharge muffler
4 R134a low pressure sensor
5 R134a high pressure switch
6 R134a high pressure sensor
7 R134a expansion valve
8 R410A heating expansion valve

9 Heating pump
10 Air purge
11 Expansion vessel
12 Heating plate heat exchanger
13 Cascade plate heat exchanger
14 R410A HP/LP gas connection
15 R410A liquid connection
16 Switchbox
17 Service port R134a high
18 Service port R134a low

41365

R6T

R4T

R7T

Sensor information:

R3T R410A liquid temperature
R4T Water return temperature
R5T Heating leaving water temperature
R6T R134a discharge temperature
R7T R134a liquid temperature

1718

R5T

R3T

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

5

1

2

17

18

A/B

7

8

S1PH

B1PH

R6T

R5T

5

Q2L

3

4

13

M1P

R4T

B1PL

6

9

16

17

6

19

14

11

10

R3T

K1E

1 Refrigerant side
2 Outdoor unit (REYQT)
3 Option domestic hot water tank
4 Muffler
5 Check valve
6 Filter
7 Field piping Ø12.7
8 Field piping Ø9.52

9 Compressor
10 Accumulator
11 Cascade heat exchanger
12 Service port
13 Heating heat exchanger
14 Drain port
15 Expansion vessel
16 Air purge

6

K2E

12 12

R7T

6

15

22

20

21

K1S

M

AB

17 Shut-off valve
18 Water outlet
19 Water inlet
20 Blow off
21 Safety valve
22 Pressure gauge

A Install the 3-way valve in case of domestic hot water tank

B Standard
B1PH High pressure sensor
B1PL Low pressure sensor

K1E Electronic expansion valve (R410A)
K1S 3-way valve
K2E Electronic expansion valve (R134a)

M1P Pump

Q2L Thermistor protector water piping

S1PH High pressure switch

Installation manual

6

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04

5.3. Switch box main components

6. DESIGN OF THE WATER CIRCUIT

15

22
11

12

13

19
20

14

62 161718 21 15 10

8

7

1

15

9
23

5

The purpose of this chapter is to give guidelines for the design of the
water circuit.

Precautions and guidelines that have impact to the unit prescribed in
this manual are included into this chapter.

Actions needed during the installation of the unit prescribed in this
manual are described in the chapter "7.6. Water piping" on page 16.

NOTICE

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 can damage the unit and will not

be removed by the standard filter of the heat pump unit.

6.1. Selection of the type of heat emitters

The selection of the heat emitter is the choice of the end customer.

3

4

1 Main PCB
2 Control PCB
3 Inverter PCB
4 QA PCB
5 Filter PCB
6 Multi tenant PCB
7 Digital I/O PCB (optional)
8 Demand PCB (optional)
9 Terminal block X1M

Main terminal block which allows easy connection
of field wiring for power supply

10 Terminal block X2M

Field wiring terminal block for high voltage
connections.

11 Terminal block X3M

Field wiring terminal block for low voltage
connections.

12 DC connector X1Y/X4Y
13 AC connector X3Y
14 Pump connector X2Y
15 Cable tie mountings

The cable tie mountings allow to fix the field wiring
with cable ties to the switch box to ensure strain
relief.

16 Power wiring entry
17 High voltage field wiring entry
18 Low voltage field wiring entry

19 Compressor cable entry
20 Interface relay K1A
21 Interface relay K2A
22 Interface relay K3A
23 Wiring bridges

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 (Leaving water temperature range from 25°C
to 40°C).
Typical example: floor heating.

2. Medium temperature (Leaving water temperature range from
40°C to 55°C).
Typical example: low temperature radiators or convectors.

3. High temperature (Leaving water temperature range from 55°C
to 75°C).
Typical example: radiators.

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.

NOTICE

In refurbishment applications, the water system will
already be fixed. It is utmost important for these kind of
installations to know the parameters mentioned above.

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

7

6.2. General precautions concerning water circuit

Before continuing the installation of the unit, check the following
points:

■ The maximum water pressure is 4 bar.

■ The maximum water temperature is 80°C.

■ Provide adequate safeguards in the water circuit to be sure that

the water pressure will never exceed the maximum allowable
working pressure (4 bar).

■ Shut-off valves from flexible hoses delivered with the unit should
be installed so that normal servicing can be accomplished
without draining the system.

■ Drain taps must be provided at all low points of the system to
permit complete drainage of the circuit during maintenance or
service to the unit. A drain valve is provided in the unit to drain
the water from the unit water system.

■ Be sure to provide a proper drain for the pressure relief valve to
avoid any water coming into contact with electrical parts.

■ Air vents must be provided at all high points of the system. The
vents shall be located at points which are easily accessible for
servicing. An automatic air purge is provided inside the indoor
unit. Check that this air purge valve is not tightened too much so
that automatic release of air in the water circuit remains
possible.

■ Take care that the components installed in the field piping can
withstand the water pressure and temperature.

■ Always use materials which are compatible with the water used
in the system and with the materials used on the unit.

■ Select piping diameter in relation to required water flow and
available ESP of the pump.

When designing the hydraulic system always consider the available
static pressure of the indoor unit.

120
110
100

90
80
70
60
50

ESP [kPa]

40
30
20
10

0

5 7 9 11131517192123 27 3133 3725 29 35 39 41

Flow [l/min]

ESP (kPa) External static pressure (kPa)
flow (l/min) Flow (l/min)

Without 3-way valve

Including 3-way valve

Maximum external static pressure if

Maximum external static pressure if

∆T=10°C (heating)

∆T=5°C (heating)

NOTICE

In most applications this miminum water volume will have a
satisfying result.

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

NOTICE

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

Example (See "6.3. Application examples" on page 9.)

A B

1112

1 Outdoor unit
2 Indoor unit
3 Refrigerant heat exchanger
4 Water heat exchanger
5 Compressor
6 Pump
7 Shut-off valve
8 Collector (field supply)

9 By-pass valve (field supply)
10 Radiator (field supply)
11 Electronic expansion valve
12 Indoor unit refrigerant stop valve

C1 Remote controller

M1...M3 Individual motorized valve to control loop radiators (field

supply)

T1...T3 Individual room thermostat (field supply)

A Installation space
B Living room

C1

11

512

7 8432 91610

M3

M2

M1

T3

T2

T1

INFORMATION

■ The ESP curve is the maximum ESP curve. The pump
of the indoor module is inverter controlled and
controls to have a fixed ∆T between return and
leaving water temperature.

■ In case of installing a domestic hot water tank there is
an additional pressure drop over the 3-way valve
(delivered as accessory with the tank).

Check that the total water volume in the installation, excluding the
internal water volume of the unit, is 20 l minimum.

Installation manual

8

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04

6.3. Application examples

Fan coils without domestic hot water tank

Floor heating without domestic hot water tank

1112

1 Outdoor unit
2 Indoor unit
3 Refrigerant heat exchanger
4 Water heat exchanger
5 Compressor
6 Pump
7 Shut-off valve
8 Collector (field supply)

9 By-pass valve (field supply))
10 FHL: Floor heating loop (field supply)
11 Electronic expansion valve
12 Indoor unit refrigerant stop valve

C1 Remote controller

M1...M3 Individual motorized valve to control loop radiators (field

supply)

T1...T3 Individual room thermostat (field supply)

A Installation place
B Living room

C1

11

512

778432 916

M3

M2

M1

A B

FHL3

FHL2

FHL1

T3

T2

T1

A B

1112

10

10

10

1 Outdoor unit
2 Indoor unit
3 Refrigerant heat exchanger
4 Water heat exchanger
5 Compressor
6 Pump
7 Shut-off valve
8 Collector (field supply)

9 By-pass valve (field supply)
10 FCU: Fan coil unit (field supply)
11 Electronic expansion valve
12 Indoor unit refrigerant stop valve

C1 Remote controller

M1...M3 Individual motorized valve to control loop radiators (field

supply)

T1...T3 Individual room thermostat (field supply)

A Installation place
B Living room

C1

11

512

7 8432 916

M3

M2

M1

10

FCU3

10

FCU2

10

FCU1

T3

T2

T1

Radiator with domestic hot water tank

C2

M

514

8

1 Outdoor unit
2 Indoor unit
3 Refrigerant heat exchanger
4 Water heat exchanger
5 Compressor
6 Pump
7 Shut-off valve
8 Motorized 3-way valve (optional)

9 Domestic hot water tank (optional)
10 Collector
11 Radiator (field supply)
12 Electronic expansion valve
13 By-pass valve (field supply)
14 Indoor unit refrigerant stop valve

C1 Remote controller (master)
C2 Remote controller (slave)

A Installation place
B Living room

A B

C1

10 13

743 121214 21

6

11

9

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

9

Application example with several heat emitters

7. INSTALLATION OF THE UNIT

Using different heat emitters means using different water set points
for the system.

Such installations must be done using a balancing bottle and each
kind of heat emitter should have a specific pump.

C1

1

3 34 5 6 8221

7

M

9

21

19
18
11

1 Outdoor unit
2 Indoor unit
3 Electronic expansion valve
4 Refrigerant heat exchanger
5 Water heat exchanger
6 Pump
7 Motorized 3-way valve (optional)
8 Domestic hot water tank (optional)

9 Compressor
10 Shut-off valve
11 Balancing bottle (field supply)
12 FHL: Floor heating loop (field supply)
13 Shut-off valve (field supply)
14 By-pass valve (field supply)
15 FCU: Fan coil unit (field supply)
16 Shut-off valve (field supply)
17 Radiator (field supply)
18 Mixing valve (field supply)
19 Pump (field supply)
20 Non-return valve (field supply)

C1 Remote controller
TRD1 Temperature reducing device 1 (field supply)
TRD2 Temperature reducing device 2 (field supply)

10 10

1512 14 141613

FHL

35°C

TRD1 TRD2

45°C

FCU

18
20 20

17

65°C

1919

Refer to chapter "9.7. Multiple set point control" on page 36 for more
information about the configuration of your system.

7.1. Selecting an installation location

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.

General precautions on installation location

Select an installation site that meets the following requirements:

■ The foundation must be strong enough to support the weight of
the unit. The floor is flat to prevent vibrations and noise
generation and to have sufficient stability.
This is especially of importance when the optional domestic hot
water tank is installed on top of the unit.

■ The space around the unit is adequate for maintenance and
servicing (refer to "Service space of the unit" on page 12).

■ 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.

■ Select the location of the unit in such a way that the sound
generated by the unit does not disturb anyone, and the location
is selected according the applicable legislation.
If the sound is measured under actual installation conditions, the
measured value will be higher than the sound pressure level
mentioned in "13. Unit specifications" on page 46 due to
environmental noise and sound reflections.
Choose the installation location carefully and do not install in a
sound sensitive environment (e.g. living room, bedroom, …)

■ 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).

Requirement Value

Maximum allowable distance between the domestic
hot water tank and the indoor unit (only for
installations with domestic hot water tank).

INFORMATION

If the installation is equipped with a domestic hot water
tank (optional), please refer to the domestic hot water tank
installation manual.

■ Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.

■ The installation location is frost-free.

■ 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.

10 m

Installation manual

10

WARNING

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

■ 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 often used as workplace. In case
of construction works, where a lot of dust is created, the unit
must be covered.

■ Do not install the unit in places with high humidity (e.g.
bathroom) (max humidity (RH)=85%).

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04

7.2. Dimensions and service space

Dimensions of unit

79 242

81

2x 60

38

74

13

694

14

2
1

8

3
4

17

18

6 68 8 2 15

9 9

11 11

10

9 9

12 12

5

10

611

465

62

381

120

∅60

251

120

15 16 16

708

15

622

637

3
4

7

600

1 HP/LP gas pipe connection Ø12.7 solder (R410A)
2 Liquid pipe connection Ø9.52 solder (R410A)
3 R134a service ports 5/16" flare (low)
4 R134a service ports 5/16" flare (high)
5 Pressure gauge
6 Blow off valve
7 Drain valve water circuit
8 Air purge

9 Shut-off valves
10 Water filter
11 Water in connection G1" (female)
12 Water out connection G1" (female)
13 Control wiring intake (knock-out hole Ø37)
14 Power supply wiring intake (knock-out hole Ø37)
15 Knock-out hole for refrigerant piping and water piping
16 Levelling feet
17 Liquid stop valve Ø9.52 solder (R410A)
18 HP/LP stop valve Ø12.7 solder (R410A)

3
4

7

16

16

26.5

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

11

Service space of the unit

7.4. Installing the unit

B

>250

≥30

D

C

>250

>500

A

>600

A Space required for switch box removal
B Left installation (top view)
C Right installation (top view)
D Space required for wiring (in case of right installation)

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.

Preparation before installation on final installation place

After unpacking the unit and before installing the unit on its final
installation position, following preparations need to be done:

■ Open the unit
Refer to the "5.1. Opening the unit" on page 4.

■ Knock out the needed knockout holes.
This installation instruction consists of installation of

■ refrigerant piping,

■ water piping and

■ electrical wiring.

For each of these a dedicated knock out hole is foreseen at the
backside of the unit:

1

2

3

1

3

7.3. Inspecting, handling and unpacking the unit

■ At delivery, the unit must be checked and any damage must be
reported immediately to the carrier’s claims agent.

■ Bring the unit as close as possible to its final installation position
in its original package to prevent damage during transport.

■ Unpack the indoor unit completely according to the instructions
mentioned on the unpacking instructions sheet.

■ Check if all indoor unit accessories (see "4. Accessories" on

page 4) are enclosed.

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.

AB

1 Knock out hole for refrigerant piping
2 Knock out hole for electrical wiring

3 Knock out hole for water piping
A Left installation
B Right installation

NOTICE

■ Knockout holes are foreseen at both sides of the

unit. Pay attention to knock out the correct holes
depending on your installation location.

■ Refrigerant piping and water piping must go

through different knockout holes.

■ The electrical wiring must always enter the unit

at the upper knockout holes at the left side of the
unit (see the figure above).

■ Do NOT use the lower knockout holes.

To punch a knockout hole, punch it with a hammer, remove all
burrs and install the supplied grommets (see "4. Accessories" on

page 4).

Installation manual

12

12 3 4

1 Knockout hole

2 Burr

3 Grommet

4 Putty or insulation materials (field supply)

■ Before installation of the unit to its final position, it is advised to
connect the water flexible pipes and refrigerant pipes to the unit
(delivered as accessory).

■ Take out all accessories from the indoor unit.

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04

■ Connect the flexible pipes to the indoor unit connection.

Fixation of piping in case of left connection

2

1

2

1

■ Installation of accessory pipes for refrigerant piping.
Depending on left or right connection, different accessory pipes
are delivered with the unit (refer to "4. Accessories" on page 4).
The refrigerant piping needs to be brazed.

NOTICE

Notice for brazing.

■ Make sure to blow through with nitrogen when
brazing.
Blowing through with nitrogen prevents the creation of
large quantities of oxidized film on the inside of the
piping. An oxidized film adversely affects valves and
compressors in the refrigerating system and prevents
proper operation.

■ The nitrogen pressure should be set to 0.02 MPa (i.e.,
just enough so it can be felt on the skin) with a
pressure-reducing valve.

2x2x2x

Fixation of piping in case of right connection

2x2x2x

12 345

6

1 Refrigerant piping
2 Part to be brazed
3 Taping
4 Hands valve
5 Pressure-reducing valve
6 Nitrogen

6

■ Do not use anti-oxidants when brazing the pipe joints.
Residue can clog pipes and break equipment.

■ Do not use flux when brazing copper-to-copper
refrigerant piping. Use phosphor copper brazing filler
alloy (BCuP) which does not require flux.

■ Flux has an extremely harmful influence on refrigerant
piping systems. For instance, if chlorine based flux is
used, it will cause pipe corrosion or, in particular, if the
flux contains fluorine, it will deteriorate the refrigerant
oil.

INFORMATION

The back plate is not shown on the illustration, but it is not
needed to take out the back plate for the installation.

HXHD125A8V1B

VRV IV system indoor unit

4P404571-1 – 2015.04

Installation manual

13

Installation on final installation position

Connecting the water circuit

■ Place the unit in the appropriate installation location.

CAUTION

The weight of the unit is approximately 116 kg. At
least two persons are required to lift the unit.

Use the plates delivered with the unit (accessory bag)
to lift the unit.

116 kg

■ Level the unit to a stable position
using the levelling feet.

■

INFORMATION

Standard installation location of the optional domestic
hot water tank is on top of the indoor unit.

If available service space to left and/or right side is
limited, carefully consider all tank module installation
steps first.

Water connections must be made. The connected flexible pipes need
to be connected to the piping that leads to the heat emitters as
follows:

1122

1 Field piping
2 To heat emitters

NOTICE

Be careful not to deform the unit piping by using excessive
force when connecting the piping. Deformation of the
piping can cause the unit to malfunction.

If air or dust gets in the water circuit, problems may occur. Therefore,
always take into account the following when connecting the water
circuit:

■ Use clean pipes only.

■ Hold the pipe end downwards when removing burrs.

■ Cover the pipe end when inserting it through a wall so that no

dust and dirt enter.

■ Use a good thread sealant for the sealing of the connections.

■ When using non-brass metallic piping, make sure to insulate

both materials from each other to prevent galvanic corrosion.

■ Because brass is a soft material, use appropriate tooling for
connecting the water circuit. Inappropriate tooling will cause
damage to the pipes.

■ Push the sound strips against the ground and fix the side plates
with the appropriate screws.

1

3

3

1

2

2

0 mm

2x

■ Close the sound panel(s) and decoration panel(s) which will be
on the wall side and for which fixation is not possible anymore
after the unit is put on its final location.

NOTICE

■ The unit is only to be used in a closed water system.
Application in an open water circuit can lead to
excessive corrosion of the water piping.

■ Never use Zn-coated parts in the water circuit.
Excessive corrosion of these parts may occur as
copper piping is used in the unit's internal water
circuit.

INFORMATION

When using a 3-way valve or a 2-way valve in the water
circuit, the maximum changeover time of the valve shall be
less than 60 seconds.

Installation manual

14

VRV IV system indoor unit

HXHD125A8V1B

4P404571-1 – 2015.04