HITACHI RWHT-5.0VNF1E Hydraulic Hydro Free High Temperature Instruction Manual

HITACHI RWHT-5.0VNF1E Hydraulic Hydro Free High Temperature

Specifications

• Model: HYDRO FREE
• Models: RWLT-(3.0-10.0)VN1E, RWHT-5.0VNF1E
• Installation and Operation Manual: PMEN0638 rev.0 – 04/2023

Product Information

The HYDRO FREE models RWLT-(3.0-10.0)VN1E and RWHT-5.0VNF1E are innovative heat pump systems designed by Hitachi. The specifications outlined in the manual are subject to change as Hitachi continuously strives to provide the latest technologies to its customers. It is essential to follow the installation and operation instructions carefully for optimal performance.

Product Usage Instructions

1. General Information

Refer to the model name to identify your specific heat pump system.

2. Safety

Ensure proper disposal of the product at the end of its lifecycle according to local regulations. Dismantling must be done by a professional installer due to refrigerant and oil components.

3. General Dimensions

Check the manual for detailed dimensions of the unit to ensure proper installation space.

4. Refrigerant and Water Piping

Follow the guidelines provided for connecting refrigerant and water piping accurately to the unit.

5. Electrical and Control Settings

Set up electrical connections and control settings as per the
manual instructions for efficient operation.

6. Unit Installation

Install the unit following the specified procedures to guarantee proper functioning.

7. Commissioning

Complete the commissioning process outlined in the manual to activate the unit.

8. Unit Controller

Familiarize yourself with the unit controller functions and settings for convenient operation.

9. Troubleshooting

Refer to the troubleshooting section in case of any issues with the unit’s performance.

10. Maintenance

Regular maintenance is crucial for the longevity of the unit. Follow the maintenance schedule provided in the manual.

FAQs

• Q: Can I dispose of the product with general household waste?
  • A: No, the product should not be mixed with general house waste at the end of its life. Follow appropriate local or national regulations for environmentally friendly disposal.
• Q: Who should dismantle the unit due to refrigerant and oil components?
  • A: The dismantling must be done by a professional installer according to applicable regulations. Contact relevant authorities for more information.

­INSTALLATION & OPERATION

HYDRO FREE
MODELS RWLT-(3.0-10.0)VN1E RWHT-5.0VNF1E
EN INSTALLATION AND OPERATION MANUAL
PMEN0638 rev.0 – 04/2023

English
Specifications in this manual are subject to change without notice in order that Hitachi may bring the latest innovations to their customers. Whilst every effort is made to ensure that all specifications are correct, printing errors are beyond Hitachi’s control; Hitachi cannot be held responsible for these errors.
Español
Las especificaciones de este manual están sujetas a cambios sin previo aviso a fin de que Hitachi pueda ofrecer las últimas innovaciones a sus clientes. A pesar de que se hacen todos los esfuerzos posibles para asegurarse de que las especificaciones sean correctas, los errores de impresión están fuera del control de Hitachi, a quien no se hará responsable de ellos.
Deutsch
Bei den technischen Angaben in diesem Handbuch sind Änderungen vorbehalten, damit Hitachi seinen Kunden die jeweils neuesten Innovationen präsentieren kann. Sämtliche Anstrengungen wurden unternommen, um sicherzustellen, dass alle technischen Informationen ohne Fehler veröffentlicht worden sind. Für Druckfehler kann Hitachi jedoch keine Verantwortung übernehmen, da sie außerhalb ihrer Kontrolle liegen.
Français
Les caractéristiques publiées dans ce manuel peuvent être modifiées sans préavis, Hitachi souhaitant pouvoir toujours offrir à ses clients les dernières innovations. Bien que tous les efforts sont faits pour assurer l’exactitude des caractéristiques, les erreurs d’impression sont hors du contrôle de Hitachi qui ne pourrait en être tenu responsable.
Italiano
Le specifiche di questo manuale sono soggette a modifica senza preavviso affinché Hitachi possa offrire ai propri clienti le ultime novità. Sebbene sia stata posta la massima cura nel garantire la correttezza dei dati, Hitachi non è responsabile per eventuali errori di stampa che esulano dal proprio controllo.
Português
As especificações apresentadas neste manual estão sujeitas a alterações sem aviso prévio, de modo a que a Hitachi possa oferecer aos seus clientes, da forma mais expedita possível, as inovações mais recentes. Apesar de serem feitos todos os esforços para assegurar que todas as especificações apresentadas são correctas, quaisquer erros de impressão estão fora do controlo da Hitachi, que não pode ser responsabilizada por estes erros eventuais.
Dansk
Specifikationerne i denne vejledning kan ændres uden varsel, for at Hitachi kan bringe de nyeste innovationer ud til kunderne. På trods af alle anstrengelser for at sikre at alle specifikationerne er korrekte, har Hitachi ikke kontrol over trykfejl, og Hitachi kan ikke holdes ansvarlig herfor.
Nederlands
De specificaties in deze handleiding kunnen worden gewijzigd zonder verdere kennisgeving zodat Hitachi zijn klanten kan voorzien van de nieuwste innovaties. Iedere poging wordt ondernomen om te zorgen dat alle specificaties juist zijn. Voorkomende drukfouten kunnen echter niet door Hitachi worden gecontroleerd, waardoor Hitachi niet aansprakelijk kan worden gesteld voor deze fouten.
Svenska
Specifikationerna i den här handboken kan ändras utan föregående meddelande för att Hitachi ska kunna leverera de senaste innovationerna till kunderna. Vi på Hitachi gör allt vi kan för att se till att alla specifikationer stämmer, men vi har ingen kontroll över tryckfel och kan därför inte hållas ansvariga för den typen av fel.
Ehnika
, Hitachi . , Hitachi , , .

! CAUTION
This product shall not be mixed with general house waste at the end of its life and it shall be retired according to the appropriated local or national regulations in a environmentally correct way. Due to the refrigerant, oil and other components contained in heat pump, its dismantling must be done by a professional installer according to the applicable regulations. Contact to the corresponding authorities for more information.
! PRECAUCIÓN
Éste producto no se debe eliminar con la basura doméstica al final de su vida útil y se debe desechar de manera respetuosa con el medio ambiente de acuerdo con los reglamentos locales o nacionales aplicables. Debido al refrigerante, el aceite y otros componentes contenidos en la bomba de calor, su desmontaje debe realizarlo un instalador profesional de acuerdo con la normativa aplicable. Para obtener más información, póngase en contacto con las autoridades competentes.
! VORSICHT
Dass Ihr Produkt am Ende seiner Betriebsdauer nicht in den allgemeinen Hausmüll geworfen werden darf, sondern entsprechend den geltenden örtlichen und nationalen Bestimmungen auf umweltfreundliche Weise entsorgt werden muss. Aufgrund des Kältemittels, Öls und anderer Komponenten in der Wärmepumpe muss ihr Ausbau von einem professionellen Installateur entsprechend der anwendbaren Vorschriften durchgeführt werden. Für weitere Informationen setzen Sie sich bitte mit den entsprechenden Behörden in Verbindung.
! ADVERTISSEMENT
Ne doit pas être mélangé aux ordures ménagères ordinaires à la fin de sa vie utile et qu’il doit être éliminé conformément à la réglementation locale ou nationale, dans le plus strict respect de l’environnement. En raison du frigorigène, de l’huile et des autres composants que contient la pompe à chaleur, son démontage doit être effectué par un installateur professionnel conformément aux règlementations en vigueur.
! AVVERTENZE
Indicazioni per il corretto smaltimento del prodotto ai sensi della Direttiva Europea 2002/96/EC e Dlgs 25 luglio 2005 n.151 Il simbolo del cassonetto barrato riportato sull’ apparecchiatura indica che il prodotto alla fine della propria vita utile deve essere raccolto separatamente dagli altri rifiuti. L’utente dovrà, pertanto, conferire l’apparecchiatura giunta a fine vita agli idonei centri di raccolta differenziata dei rifiuti elettronici ed elettrotecnici, oppure riconsegnarla al rivenditore al momento dell’ acquisto di una nuova apparecchiatura di tipo equivalente. L’adeguata raccolta differenziata delle apparecchiature dismesse, per il loro avvio al riciclaggio, al trattamento ed allo smaltimento ambientalmente compatibile, contribuisce ad evitare possibili effetti negativi sull’ ambiente e sulla salute e favorisce il riciclo dei materiali di cui è composta l’ apparecchiatura. Non tentate di smontare il sistema o l’unità da soli poichè ciò potrebbe causare effetti dannosi sulla vostra salute o sull’ ambiente. Vogliate contattare l’ installatore, il rivenditore, o le autorità locali per ulteriori informazioni. Lo smaltimento abusivo del prodotto da parte dell’utente può comportare l’applicazione delle sanzioni amministrative di cui all’articolo 50 e seguenti del D.Lgs. n. 22/1997.
! CUIDADO
O seu produto não deve ser misturado com os desperdícios domésticos de carácter geral no final da sua duração e que deve ser eliminado de acordo com os regulamentos locais ou nacionais adequados de uma forma correcta para o meio ambiente. Por causa do refrigerante, do óleo e de outros componentes na bomba de calor, o desmantelamento deve ser realizado por um instalador profissional em conformidade com os regulamentos aplicáveis. Contacte as autoridades correspondentes para obter mais informações.
! ADVASEL!
At produktet ikke må smides ud sammen med almindeligt husholdningsaffald, men skal bortskaffes i overensstemmelse med de gældende lokale eller nationale regler på en miljømæssig korrekt måde. Da varmepumpen indeholder kølemiddel, olie samt andre komponenter, skal afmontering foretages af en fagmand i overensstemmelse med de gældende bestemmelser. Kontakt de pågældende myndigheder for at få yderligere oplysninger.
! VOORZICHTIG
Dit houdt in dat uw product niet wordt gemengd met gewoon huisvuil wanneer u het weg doet en dat het wordt gescheiden op een milieuvriendelijke manier volgens de geldige plaatselijke en landelijke reguleringen. Wegens de aanwezigheid van koelmiddel, olie en andere componenten in de warmtepomp moet het apparaat volgens de toepasselijke regelgeving door een professionele installateur worden gedemonteerd. Neem contact op met de betreffende overheidsdienst voor meer informatie.
! FÖRSIKTIGHET
Det innebär att produkten inte ska slängas tillsammans med vanligt hushållsavfall utan kasseras på ett miljövänligt sätt i enlighet med gällande lokal eller nationell lagstiftning. Eftersom värmepumpen innehåller kylmedel, oljor och andra komponenter, måste den demonteras av en behörig installatör i enlighet med gällande föreskrifter. Ta kontakt med ansvarig myndighet om du vill ha mer information.
!
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MODELS CODIFICATION

CODIFICACIÓN DE MODELOS
MODELLCODES

Important note: Please, check, according to the model name, which is your heat pump system, how it is abbreviated and referred to in this instruction manual. This Installation and Operation Manual is related to HYDRO FREE Units.
Nota importante: compruebe, de acuerdo con el nombre del modelo, el tipo de bomba de calor, su abreviatura y su referencia en el presente manual de instrucciones. Este Manual de instalación y funcionamiento está relacionado con unidades HYDRO FREE.
Wichtiger Hinweis: Bitte stellen Sie anhand der Modellbezeichnung den Typ der Wärmepumpe und das entsprechende, in diesem Technischen Handbuch verwendete Kürzel fest. Dieses Installations- und Betriebshandbuch bezieht sich auf die HYDRO FREE Geräte

CODIFICATION DES MODÈLES

Note importante : veuillez déterminer, d’après le nom du modèle, quel est votre type de pompe à chaleur et quelle est son abréviation et référence dans ce manuel d’instruction. Ce manuel d’installation et de fonctionnement concerne les unités HYDRO FREE.

CODIFICAZIONE DEI MODELLI

Nota importante: controllare in base al modello il tipo di pompa di calore, la descrizione e il tipo di abbreviazione utilizzati nel manuale di istruzioni. Questo Manuale di installazione e d’uso è relativo alle unità HYDRO FREE.

CODIFICAÇÃO DE MODELOS

Nota Importante: de acordo com o nome do modelo, verifique o tipo da sua bomba de calor e a respetiva abreviatura e menção neste manual de instruções. Este manual de instalação e de funcionamento está relacionado com unidades HYDRO FREE

MODELKODIFICERING
CODERING VAN DE MODELLEN
MODELLER

Vigtig information: Kontrollér venligst din varmepumpetype i henhold til modelnavnet, hvordan den forkortes, og hvilken reference den har i denne vejledning. Denne installations- og betjeningsvejledning gælder for HYDRO FREE-enheder.
Belangrijke opmerking: Controleer aan de hand van de modelnaam welk type warmtepomp u heeft, hoe de naam wordt afgekort en hoe ernaar wordt verwezen in deze instructiehandleiding. Deze installatie- en gebruikshandleiding geldt voor HYDRO FREEunits.
Viktigt! Kontrollera med modellnamnet vilken typ av värmepump du har, hur den förkortas och hur den anges i den här handboken. Denna Installations- och driftshandbok gäller för HYDRO FREE-enheter.

: , , . HYDRO FREE.

EN English

Original version

ES Español

Versión traducida

DE Deutsch

Übersetzte Version

FR Français

Version traduite

IT

Italiano

Versione tradotta

PT Português

Versão traduzidal

DA

Dansk

Oversat version

NL Nederlands

Vertaalde versie

SV Svenska

Översatt version

EL

INDEX
1 GENERAL INFORMATION 2 SAFETY 3 GENERAL DIMENSIONS 4 REFRIGERANT AND WATER PIPING 5 ELECTRICAL AND CONTROL SETTINGS 6 UNIT INSTALLATION 7 COMMISSIONING 8 UNIT CONTROLLER 9 TROUBLESHOOTING 10 MAINTENANCE
ÍNDICE
1 INFORMACIÓN GENERAL 2 SEGURIDAD 3 DIMENSIONES GENERALES 4 TUBERÍAS DE AGUA Y DE REFRIGERANTE 5 AJUSTES ELÉCTRICOS Y DE CONTROL 6 INSTALACIÓN DE LA UNIDAD 7 PUESTA EN MARCHA 8 CONTROLADOR DE LA UNIDAD 9 RESOLUCIÓN DE PROBLEMAS 10 MANTENIMIENTO
INHALT
1 ALLGEMEINE INFORMATIONEN 2 SICHERHEIT 3 ALLGEMEINE ABMESSUNGEN 4 KÄLTEMITTEL- UND WASSERLEITUNGEN 5 ELEKTRISCHE UND STEUERUNGS-EINSTELLUNGEN 6 GERÄTEINSTALLATION 7 INBETRIEBNAHME 8 GERÄTESTEUERUNG 9 FEHLERBEHEBUNG 10 WARTUNG
INDEX
1 INFORMATIONS GÉNÉRALES 2 SÉCURITÉ 3 DIMENSIONS GÉNÉRALES 4 TUYAUTERIE FRIGORIFIQUE ET D’EAU 5 RÉGLAGES DE COMMANDE ET ÉLECTRIQUES 6 INSTALLATION DES UNITÉS 7 MISE EN SERVICE 8 CONTRÔLEUR D’UNITÉ 9 DÉPANNAGE 10 MAINTENANCE
INDICE
1 INFORMAZIONI GENERALI 2 SICUREZZA 3 DIMENSIONI GENERALI 4 LINEE DELL’ACQUA E DEL REFRIGERANTE 5 IMPOSTAZIONI ELETTRICHE E DI CONTROLLO 6 INSTALLAZIONE DELL’UNITÀ 7 MESSA IN SERVIZIO 8 DISPOSITIVO DI CONTROLLO DELL’UNITÀ 9 RISOLUZIONE DEI PROBLEMI 10 MANUTENZIONE

ÍNDICE
1 INFORMAÇÃO GERAL 2 SEGURANÇA 3 DIMENSÕES GERAIS 4 TUGAGEM DE REFRIGERANTE E DE ÁGUA 5 AJUSTES DE CONTROLO E ELÉTRICOS 6 INSTALAÇÃO DA UNIDADE 7 COLOCAÇÃO EM FUNCIONAMENTO 8 CONTROLADOR DA UNIDADE 9 RESOLUÇÃO DE PROBLEMAS 10 MANUTENÇÃO
INDHOLDSFORTEGNELSE
1 GENEREL INFORMATION 2 SIKKERHED 3 GENERELLE MÅL 4 KØLEMIDDEL- OG VANDRØR 5 ELEKTRISKE OG KONTROLINDSTILLINGER 6 INSTALLATION AF ENHED 7 IDRIFTSÆTTELSE 8 STYREENHED 9 FEJLFINDING 10 VEDLIGEHOLDELSE
INHOUDSOPGAVE
1 ALGEMENE INFORMATIE 2 VEILIGHEID 3 ALGEMENE AFMETINGEN 4 KOUDEMIDDEL- EN WATERLEIDINGEN 5 ELEKTRISCHE EN BESTURINGSINSTELLINGEN 6 INSTALLATIE VAN DE UNIT 7 INBEDRIJFSTELLING 8 BESTURING VAN UNIT 9 PROBLEMEN OPLOSSEN 10 ONDERHOUD
INNEHÅLLSFÖRTECKNING
1 ALLMÄN INFORMATION 2 SÄKERHET 3 ALLMÄNA MÅTT 4 KYL- OCH VATTENRÖR 5 EL- OCH STYRINNSTÄLLNINGAR 6 INSTALLATION AV ENHET 7 DRIFTSÄTTNING 8 ENHETENS STYRMODUL 9 FELSÖKNING 10 UNDERHÅLL

1 2 3 4 5 6 7 8 9 10

ENGLISH

GENERAL INFORMATION

1 GENERAL INFORMATION

No part of this publication may be reproduced, copied, filed or transmitted in any shape or form without the permission of Johnson Controls-Hitachi Air Conditioning Spain, S.A.U.
Within the policy of continuous improvement of its products, Johnson Controls- Hitachi Air Conditioning Spain, S.A.U. reserves the right to make changes at any time without prior notification and without being compelled to introduce them into products subsequently sold. This document may therefore have been subject to amendments during the life of the product.

Hitachi makes every effort to offer correct, up-to-date documentation. Despite this, printing errors cannot be controlled by Hitachi and are not its responsibility.
As a result, some of the images or data used to illustrate this document may not refer to specific models. No claims will be accepted based on the data, illustrations and descriptions included in this manual.

SAFETY

2.1 APPLIED SYMBOLS

During normal heat pump system design work or unit installation, greater attention must be paid in certain situations requiring particular care in order to avoid injuries and damage to the unit, the installation or the building or property.
Situations that jeopardise the safety of those in the surrounding area or that put the unit itself in risk are clearly indicated in this manual.
A series of special symbols are used to clearly identify these situations.
Pay close attention to these symbols and to the messages following them, as your safety and that of others depends on it.
! DANGER
· The text following this symbol contains information and instructions relating directly to your safety, in addition to hazards or unsafe practices which could result in severe personal injuries or death.
· Not taking these instructions into account could lead to serious, very serious or even fatal injuries to you and others in the proximities of the unit.

In the text following the danger symbol you can also find information on safe procedures during unit installation.
! CAUTION
· The text following this symbol contains information and instructions relating directly to your safety, in addition to hazards or unsafe practices which could result in minor personal injury or product or property damage..
· Not taking these instructions into account could lead to minor injuries to you and others in the proximities of the unit.
· Not taking these instructions into account could lead to unit damage.
In the text following the caution symbol you can also find information on safe procedures during unit installation.
? NOTE
· The text following this symbol contains information or instructions that may be of use or that require a more thorough explanation.
· Instructions regarding inspections to be made on unit parts or systems may also be included.

2.2 ADDITIONAL INFORMATION ABOUT SAFETY

! DANGER
· DO NOT CONNECT THE POWER SUPPLY TO THE INDOOR UNIT PRIOR TO FILLING THE SPACE HEATING CIRCUIT (AND DHW CIRCUIT IF IT WERE THE CASE) WITH WATER AND CHECKING WATER PRESSURE AND THE TOTAL ABSENCE OF ANY WATER LEAKAGE.
· Do not pour water over the indoor unit electrical parts. If the electrical components are in contact with water a serious electrical shock will take place.
· Do not touch or adjust the safety devices inside the air to water heat pump. If these devices are touched or adjusted, a serious accident can take place.
· Do not open the service cover or access inside the air to water heat pump without disconnecting the main power supply.
· In case of fire Turn OFF the main switch, put out the fire at once and contact your service contractor.
· It must ensure that the air to water heat pump cannot operate accidentally without water neither with air inside hydraulic system.

! CAUTION
· Do not use any sprays such as insecticide, lacquer, hair spray or other flammable gases within approximately one meter from the system.
· If installation circuit breaker or the unit fuse is often activated, stop the system and contact your service contractor.
· Do not make service or inspections tasks by yourself. This work must be performed by a qualified service person.
· This appliance must be used only by adult and capable people, having received the technical information or instructions to handle this appliance properly and safely.
· Children should be supervised to ensure that they do not play with the appliance.
· Do not let any foreign body into the water inlet and outlet piping of the air to water heat pump.

1 PMEN0638 rev.0 – 04/2023

SAFETY

2.3 IMPORTANT NOTICE
· The supplementary information about the purchased products is available through the QR printed in the front cover. In case that no access to the website or files are not readable, please contact your Hitachi dealer or distributor.
· PLEASE READ THE MANUAL AND DOWNLOADED FILES THROUGH THE QR CAREFULLY BEFORE STARTING TO WORK ON THE INSTALLATION. Failure to observe the instructions for installation, use and operation described in this documentation may result in operating failure including potentially serious faults, or even the destruction of the air to water heat pump system.
· Verify, in accordance with the manuals which appear in the outdoor and indoor units, that all the information required for the correct installation of the system is included. If this is not the case, contact your distributor.
· Hitachi pursues a policy of continuous improvement in product design and performance. The right is therefore reserved to vary specifications without notice.
· Hitachi cannot anticipate every possible circumstance that might involve a potential hazard.
· This air to water heat pump has been designed for standard water heating for human beings only. Do not use this for other purposes such as for drying clothes, heating foods or for any other heating process (except swimming pool).
· No part of this manual may be reproduced without written permission.

· If you have any questions, contact your service contractor of Hitachi.
· Check and make sure that the explanations of each part of this manual correspond to your air to water heat pump model.
· Refer to the models codification to confirm the main characteristics of your system.
· Signal words (NOTE, DANGER and CAUTION) are used to identify levels of hazard seriousness. Definitions for identifying hazard levels are provided in initial pages of this document.
· The operation modes of these units are controlled by the unit controller.
· This manual should be considered as a permanent part of the air to water heat pump. It gives a common description of and information for this air to water heat pump which you operate as well as for other models.
· Keep the water temperature of the system above the freezing temperature.
· Water temperature (max/min): 5 ºC / 60 ºC
· Water pressure (max/min): 1 bar / 3 bar
· This equipment must be connected to the watermain.
· lf the domestic cold water entry pressure is higher than the equipment’s design pressure (10 bar), a pressure reducer must be fitted with a nominal value of 7 bar.

2 PMEN0638 rev.0 – 04/2023

ENGLISH

GENERAL DIMENSIONS

3 GENERAL DIMENSIONS
3.1 SERVICE SPACE
RWLT-(3.0-10.0)VN1E
Top view

Front view

H: 1200~1500 mm
Recommended unit height for proper access to the control unit panel (Unit controller).
h: 350 mm
Minimum unit height for installing the shut-off valves and the first bending pipe line.

RWHT-5.0VNF1E

Top view

Left side
Service with this space is possible but, for an easier servicing of some components it is recommended to
let a space >500mm

500mm (Min. distance for E-box removal)

Right side

Units in mm. Front view
Units in mm.

3 PMEN0638 rev.0 – 04/2023

GENERAL DIMENSIONS

3.2 NAME OF PARTS AND DIMENSIONAL DATA
3.2.1 RWLT-3.0VN1E

Side view

Front view

Wall fixing holes

OK

Bottom view Wall support dimensions

Water Liquid Gas

XEKS1793

Nº

Part name

1 Plate heat exchanger

2 Water pump

3 Solenoid valve (SV1)

4 Expansion vessel 6L

5 Water strainer

6 Air purger

7 Safety valve

8 Drain pipe for safety valve

9 Expansion valve

10 Manometer

11 Refrigerant strainer (x2)

12 Unit controller

Units in mm

Nº

Part name

13 Electrical box

14 Switch for DHW emergency operation

15 Water inlet pipe connection – G 1″ Female

16 Water outlet pipe connection – G 1″ Female

17 Refrigerant gas pipe connection – 15.88 (5/8″)

18 Refrigerant liquid pipe connection – 9.52 (3/8″)

19 Shut-off valve (Factory-supplied accessory)

20 Thermistor (Water inlet pipe)

21 Thermistor (Water outlet pipe)

22 Thermistor (Liquid refrigerant pipe)

23 Thermistor (Gas refrigerant pipe)

4 PMEN0638 rev.0 – 04/2023

ENGLISH

GENERAL DIMENSIONS

3.2.2 RWLT-5.0VN1E
Side view

Front view

Wall fixing holes

Wall support dimensions

Bottom view

Water Liquid Gas

XEKS1794

Nº

Part name

1 Plate heat exchanger

2 Water pump

3 Solenoid valve (SV1)

4 Expansion vessel 6L

5 Water strainer

6 Air purger

7 Safety valve

8 Drain pipe for safety valve

9 Expansion valve

10 Manometer

11 Refrigerant strainer (x2)

12 Unit controller

Nº

Part name

13 Electrical box

14 Switch for DHW emergency operation

15 Water inlet pipe connection – G 1 1/4″ female

16 Water outlet pipe connection – G 1 1/4″ female

17 Refrigerant gas pipe connection – 15.88 (5/8″)

18 Refrigerant liquid pipe – 9.52 (3/8″)

19 Shut-off valve (Factory supplied accessory)

20 Thermistor (Water inlet pipe)

21 Thermistor (Water outlet pipe)

22 Thermistor (Liquid refrigerant pipe)

23 Thermistor (Gas refrigerant pipe)

5 PMEN0638 rev.0 – 04/2023

Units in mm

GENERAL DIMENSIONS
3.2.3 RWLT-10.0VN1E
Side view

Front view

Wall fixing holes

Wall support dimensions

Bottom view

Water Liquid Gas

XEKS1795

Nº

Part name

1 Plate heat exchanger

2 Water pump

3 Solenoid valve (SV1)

4 Expansion vessel 10L

5 Water strainer

6 Air purger

7 Safety valve

8 Drain pipe for safety valve

9 Expansion valve (x2)

10 Manometer

11 Refrigerant strainer (x4)

12 Unit controller

Nº

Part name

13 Electrical box

14 Switch for DHW emergency operation

15 Water inlet pipe connection – G 1 1/4″ Female

16 Water outlet pipe connection – G 1 1/4″ Female

17 Refrigerant gas pipe connection – Ø22.2 (7/8″) 18 Refrigerant liquid pipe connection – Ø9.52 (3/8″) 19 Shut-off valve (factory-supplied accessory) 20 Thermistor (Water inlet pipe)

21 Thermistor (Water outlet pipe)

22 Thermistor (Liquid refrigerant pipe)

23 Thermistor (Gas refrigerant pipe)

Units in mm

6 PMEN0638 rev.0 – 04/2023

ENGLISH

GENERAL DIMENSIONS

3.2.4 RWHT-5.0VNF1E
Top view
Front view

Side view

XEKS1717

Nº

Part name

1 Electronic expansion valve (R410A)

2 Refrigerant strainer (x2)

3 Check joint (R410A)

4 Check valve (R410A)

5 Plate heat exchanger (R410A-R134a)

6 Solenoid valve (1 cycle)

7 Solenoid valve (2 cycles)

8 Compressor

9 Low pressure sensor (Ps)

10 High pressure sensor (Pd)

11 High pressure switch (PSH)

12 Check joint (R134a)

13 Check valve (R134a)

14 Electronic expansion valve (R134a)

15 Plate heat exchanger (R134a-H2O)

16 Plate heat exchanger (R410A-H2O)

17 Water pressure port

18 Water pump

Nº

Part name

19 Safety valve

20 Drain pipe

21 Air purger

22 Water strainer

23 Expansion vessel 12L

24 Manometer

25 Refrigerant gas pipe – 15.88 (5/8″)

26 Refrigerant liquid pipe – 9.52 (3/8″)

27 Water inlet pipe – G 1 1/4″ female

28 Water outlet pipe – G 1 1/4″ female

29 Shut-off valve (Factory supplied)

30 Refrigerant gas pipe thermistor

31 Refrigerant liquid pipe thermistor

32 Compressor suction thermistor

33 Compressor discharge thermistor

34 Water inlet thermistor

35 Water outlet thermistor

36 Switch for DHW “emergency” operation

7 PMEN0638 rev.0 – 04/2023

Units in: mm

REFRIGERANT AND WATER PIPING

REFRIGERANT AND WATER PIPING

4.1 GENERAL NOTES BEFORE PERFORMING PIPING WORK

· Prepare locally-supplied copper pipes.
· Select the piping size with the correct thickness and correct material able to withstand sufficient pressure.
· Select clean copper pipes. Make sure that there is no dust or moisture inside the pipes. Blow the inside of the pipes with oxygen free nitrogen to remove any dust and foreign materials before connecting them.
? NOTE
A system with no moisture or oil contamination will give maximum performance and lifecycle compared to that of a poorly prepared system. Take particular care to ensure that all copper piping is clean and dry internally.
· Cap the end of the pipe when pipe is to be inserted through a wall hole.
· Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe.

· If piping installation is not completed until next day or over a longer period of time, braze off the ends of the piping and charge with oxygen free nitrogen through a Schrader valve type access fitting to prevent moisture and particle contamination.
· It is advisable to insulate the water pipes, joints and connections in order to avoid heat loss and dew condensation on the surface of the pipes or accidental injures due to excessive heat on piping surfaces.
· Do not use insulation material that contains NH3, as it can damage copper pipe material and become a source of future leakage.
· It is recommended to use flexible joints for the water piping inlet and outlet in order to avoid vibration transmission.
· Refrigerant circuit and Water circuit must be performed and inspected by a licensed technician and must comply with all relevant European and national regulations.
· Proper water pipe inspection should be performed after piping work to assure there is no water leakage in the space heating circuit.

4.2 REFRIGERANT CIRCUIT

4.2.1 Precautions in the event of gas refrigerant leaks

The installers and those responsible for drafting the specifications are obliged to comply with local safety codes and regulations in the case of refrigerant leakage.
! CAUTION
· Check for refrigerant leakage in detail. If a large refrigerant leakage occurred, it would cause difficulty with breathing or harmful gases would occur if a fire were in the room.
· If the flare nut is tightened too hard, it may crack over time and cause refrigerant leakage.
Maximum permitted concentration of HFCs
The refrigerant R410A and the refrigerant R134a are incombustible and non- toxic gases. However, if leakage occurs and gas fills a room, it may cause suffocation.
The maximum permissible concentration of HFC gas according to EN 378-1 is:

The minimum volume of a closed room where the system is installed to avoid suffocation in case of leakage is:

System combination (RWLT) 3 HP 5 HP 10 HP

Minimum volume (m3) 3.9 7.8 12.1

System combination (RWHT) 5 HP

Minimum volume (m3) 7.6

Refrigerant charge before shipment (W0 (kg))

Indoor unit

Model RWHT-5.0VNF1E

W0 (kg) R134a 1.9

Refrigerant R410A R134a

Maximum permissible concentration (kg/m3) 0.44 0.25

8 PMEN0638 rev.0 – 04/2023

ENGLISH

REFRIGERANT AND WATER PIPING
4.3 SPACE HEATING AND DHW
! DANGER
Do not connect the power supply to the indoor unit prior to filling the space heating circuit (and DHW circuit if it were the case) with water and checking water pressure and the total absence of any water leakage.
4.3.1 Additional hydraulic necessary elements for space heating

HYDRO FREE

Nature Piping connections
Factory supplied Accessories Field supplied

No.

Part name

1 Water inlet (Space heating)

2 Water outlet (Space heating)

3 Shut-off valve (factory-supplied)

4

Water check valve (ATW-WCV-01 accessory)

5 Shut-off valve

The following hydraulic elements are necessary to correctly perform the space heating water circuit:
· Two shut-off valves (factory supplied accessory) (3) must be installed in the indoor unit. One at the water inlet connection (1) and the other at the water outlet connection (2) in order to make easier any maintenance work.
· A water check valve (ATW-WCV-01 accessory) (5) with 1 shut-off valve (field supplied) (4) must be connected to the water filling point when filling the indoor unit. The check valve acts as a safety device to protect the installation against back pressure, back flow and back syphon of non-potable water into drinking water supply net.

4.3.2 Additional hydraulic necessary elements for DHW

HYDRO FREE

Nature
Piping connections
Factory supplied Accessories
Field supplied

Nº

Part name

1 Water inlet (Space heating)

2 Water outlet (Space heating)

3 Heating coil inlet

4 Heating coil outlet

5 Water inlet (DHW)

6 Water outlet (DHW)

7 Shut-off valve (factory-supplied)

Domestic hot water tank 8 (DHWT-(200/300)S-3.0H2E
accessory)

9

3-way valve (ATW-3WV-01 accessory)

10 T-branch

11 Heating coil pipes

HYDRO FREE is not factory-supplied ready for DHW operation, but it can be used for the production of DHW if the following elements are installed: · A domestic hot water tank (DHWT-(200/300)S-3.0H2E accessory) (8) has to be installed in combination with the indoor unit. · A 3-way valve (ATW-3WV-01 accessory) (9) must be connected at one point of the water outlet pipe of the installation. · A T-branch (field supplied) (10) must be connected at one point of the water inlet pipe of the installation. · Two water pipes (field supplied) (11). One pipe between 3-way valve and the heating coil inlet (3) of the DHW tank, the other
one between the T-branch and the heating coil outlet (4) of the DHW tank.
9 PMEN0638 rev.0 – 04/2023

REFRIGERANT AND WATER PIPING Additionally, the following elements are required for the DHW circuit:

Nature

Nº

Part name

1 Water inlet (DHW) Piping connections
2 Water outlet (DHW)

Pressure and temperature relief valve

Field supplied

3a Shut-off valve 3
3b Water check valve 3c Pressure relief valve

4 Shut-off valve

5 Draining

· 1 Shut-off valve (field supplied): one shut-off valve (4) must be connected after the DHW outlet connection of the DHW tank (2) in order to make easier any maintenance work.
· A Security water valve (Field-supplied): this accessory (3) is a pressure and temperature relief valve that must be installed as near as possible to the DHW inlet connection of the DHW tank (1). It should ensure a correct draining (5) for the discharge valve of this valve. This security water valve should provide the following:
– Pressure protection
– Non-return function
– Shut-off valve
– Filling
– Draining

? NOTE
The discharge pipe should always be open to the atmosphere, free of frost and in continuous slope to the down side in case that water leakage exists.
4.3.3 Additional hydraulic optional elements (For DHW)

In case of a recirculation circuit for the DHW circuit:

Nature

Nº

Part name

1 Water inlet (DHW) Piping connections
2 Water outlet (DHW)

Accessories

3

Water check valve (ATW-WCV-01 accessory)

Field supplied

4 Water pump 5 Shut-off valve

· 1 Recirculation water pump (field supplied): this water pump (4) will help to correctly recirculate the hot water to the DHW inlet.
· 1 Water check valve (ATW-WCV-01 accessory): this Hitachi accessory (3) is connected after the recirculation water pump (4) in order to ensure the non- return of water.
· 2 Shut-off valves (field supplied) (5): one before the recirculation water pump (4) and other after the water check valve accessory (3).

10 PMEN0638 rev.0 – 04/2023

ENGLISH

REFRIGERANT AND WATER PIPING

4.3.4 Requirements and recommendations for the hydraulic circuit

· The maximum piping length depends on the maximum pressure availability in the water outlet pipe. Please check the pump curves.
· The indoor unit is equipped with an air purger (factory supplied) at the highest location of the Indoor Unit. If this location is not the highest of the water installation, air might be trapped inside the water pipes, which could cause system malfunction. In that case additional air purgers (field supplied) should be installed to ensure no air enters the water circuit.
· For heating floor system, the air should be purged by means of an external pump and an open circuit to avoid air bags.
· When the unit is stopped during shut-off periods and the ambient temperature is very low, the water inside the pipes and the circulating pump may freeze, thus damaging the pipes and the water pump. In these cases, the installer shall ensure that the water temperature inside the pipes does not fall below the freezing point. In order to prevent this, the unit has a self-protection mechanism which should be activated (refer to the Service manual, “Optional functions” chapter).
· Check that the water pump of the space heating circuit works within the pump operating range and that the water flow is over the pump’s minimum. If the water flow is below 12 litres/minute (6 litres/minute for 3.0HP unit), alarm is displayed on the unit.
· An additional special water filter is highly recommended to be installed on the space heating (field installation), in order to remove possible particles remaining from brazing which cannot be removed by the indoor unit water strainer.
· When selecting a tank for DHW operation, take into consideration the following points:
– The storage capacity of the tank has to meet with the daily consumption in order to avoid stagnation of water.
– Fresh water must circulate inside the DHW tank water circuit at least one time per day during the first days after the installation has been performed. Additionally, flush the system with fresh water when there is no consumption of DHW during long periods of time.
– Try to avoid long runs of water piping between the tank and the DHW installation in order to decrease possible temperature losses.
– lf the domestic cold water entry pressure is higher than the equipment’s design pressure (6 bar), a pressure reducer must be fitted with a nominal value of 7 bar.
· Ensure that the installation complies with applicable legislation in terms of piping connection and materials, hygienic measures, testing and the possible required use of some specific components like thermostatic mixing valves, Differential pressure overflow valve, etc.
· The maximum water pressure is 3 bar (nominal opening pressure of the safety valve). Provide adequate reduction pressure device in the water circuit to ensure that the maximum pressure is NOT exceeded.
· Ensure that the drain pipes connected to the safety valve and to the air purger are properly driven to avoid water being in contact with unit components.

· Make sure that all field supplied components installed in the piping circuit can withstand the water pressure and the water temperature range in which the unit can operate.
· HYDRO FREE units are conceived for exclusive use in a closed water circuit.
· The internal air pressure of the expansion vessel tank will be adapted to the water volume of the final installation (factory supplied with 0.1 MPa of internal air pressure).
· Do not add any type of glycol to the water circuit.
· Drain taps must be provided at all low points of the installation to permit complete drainage of the circuit during servicing.
4.3.5 Water filling
1 Check that a water check valve (ATW-WCV-01 accessory) with a shut-off valve (field supplied) is connected to the water filling point (water inlet connection) for filling the space heating hydraulic circuit (see “4.3 Space heating and DHW”).
2 Make sure all the valves are open (water inlet/outlet shut-off valves and the rest of valves of the space heating installation components).
3 Ensure that the air purgers of the indoor unit and installation are open (turn the indoor unit air purger twice at least).
4 Check that the drain pipes connected to the safety valve are correctly connected to the general draining system. The safety valve is later used as an air purging device during the water filling procedure.
5 Fill the space heating circuit with water until the pressure displayed on the manometer reaches approximately 1.8 bar.
? NOTE
While the system is being filled with water, it is highly recommended to operate the safety valve manually so as to help with the air purging procedure.
6 Remove as much air from inside the water circuit as possible through the indoor air purger and other air vents in the installation (fan coils, radiators…).
7 Start the air purge procedure test. There are two modes (Manual or Automatic) which helps in case of installations with heating and DHW operation:
a. Manual: Start and stop the unit manually using the unit controller (Run/Stop button) and also using the DSW4 pin 2 of the PCB1 (ON: Forced to derive to DHW coil; OFF: Forced to derive to space heating).
b. Automatic: Select the air purge function using the user controller. When the automatic air purge function is running, the pump speed and the position of the 3-way valve (space heating or DHW) are automatically changed.

11 PMEN0638 rev.0 – 04/2023

REFRIGERANT AND WATER PIPING

Repeat…

hydraulic pipes to remove sludge and scale by using a specific designed product for cleaning central heating systems.

Water pump
ON DHW 3Wv
OFF

Also, its recommended to use a product inhibitor for protecting

central heating systems against limescale and corrosion, always

Seconds Repeat…

following manufacturer’s instructions and ensuring that the

product is suitable for the material used in the water network

and the YUTAKI unit.

Seconds When using chemical treatments and inhibitors always follow

8 If a little quantity of air is still remaining in the water circuit, it will be removed by the automatic air purger of the indoor
unit during the first hours of operation. Once the air in the installation has been removed, a reduction of water pressure in the circuit is very likely to occur. Therefore, additional
water should be filled until water pressure returns to an approximate level of 1.8 bar.

manufacturer’s instructions and ensure that the product is
appropriate for the total water system. Using filling water that does not meet the stated quality requirements can cause a considerably reduce in service life. The responsibility will be out of Hitachi warranties. The following water quality minimum requirement:

Parameter

Parametric Value

Unit

? NOTE
· The indoor unit is equipped with an automatic air purger (factory supplied) at the highest location of the indoor unit. Anyway, if there are higher points in the water installation, air might be trapped inside water pipes, which could cause system malfunction. In that case, additional air purgers (field supplied) should be installed to ensure no air enters into the water circuit. The air vents should be located at points which are easily accessible for servicing.

pH Conductivity
Alkalinity
Total Hardness
Chlorine

6.5 to 8.5 10~500 60~300
6~15 0.6~1.5 60~150
<50

µs/cm mg/l
°f H mmol/l mg CaCO3 /I mg CI¯/I

· The water pressure indicated on the indoor unit manometer may vary depending on the water temperature (the higher temperature, the higher pressure). Nevertheless, it must remain above 1 bar in order to prevent air from entering the circuit.

Sulphate Nitrate Iron

<50 <100 <0.2

(mg SO42-/l) mg/l (NO3) mg/l (Fe)

· Fill in the circuit with tap water. The water in the heating installation must comply with EN directive 98/83 EC. Non-sanitary controlled water is not recommended (for example, water from wells, rivers, lakes, etc.).
· The maximum water pressure is 3 bar (nominal opening pressure of the safety valve). Provide adequate reduction pressure device in the water circuit to ensure that the maximum pressure is NOT exceeded.
· For heating floor system, air should be purged by means of an external pump and an open circuit to prevent the formation of air pockets.
· Check carefully for leaks in the water circuit, connections and circuit elements.
4.3.6 Water quality

TDS (Total dissolved solids)

8~400

ppm

Appearance of the water

Clear and without deposits

–

Additional DHW Circuit recommendation
In places where possible hard water areas, to prevent and minims scale situations, it is recommended to reduce stored water temperature to a maximum of 55°C, as hug e scale quantity could damage the water tank and the electrical heater.

General recommendations for Primary (Space
Heating/Cooling) and Secondary (DHW) circuit
! CAUTION

Flush the domestic water circuit with at least 10 times its volume of water. The life of the water tank will be shorter if groundwater (spring water, well water, etc..) is used without treatment which can lead to the corrosion of the tank. The water must not be aggressive or encrusting at any time. The result of calculating the Langelier Index should be between +/- 0.5.

· Water quality must be according to EU council directive 98/83 EC.
· Water should be subjected to filtration or to a softening treatment with chemicals before application as treated water.
· It is also necessary to analyse the quality of water by checking pH, electrical conductivity, ammonia ion content, sulphur content, and others. If the results of the analysis are not good, the use of industrial water would be recommended.
· No antifreeze agent shall be added to the water circuit.

In installation locations where the result of Langelier Index calculation are out of the expected value with a tendency to corrosive water, it is recommended to install the active anode accessory (ATW-CP-05 only available for YUTAKI H Combi version).
In the regions where the water is very hard (or out of requirements values) or where the result of Langelier Index calculation are out of expected value with a tendency to hard water, it is recommended fitting a softener system. Please ensure that softener system will be capable of providing effective protection against corrosion. It is recommended to install the active anode accessory (ATW-CP-05 only available for YUTAKI H Combi version).

· To avoid deposits of scale on the heat exchangers surface it is mandatory to ensure a high water quality with low levels of CaCO3.
Before water filling, sludge removal (for existing water networks), cleansing and rinsing (for an existing or new

As DHW Tank water is being used for storing drinking water, this water has to be in accordance with national regulations and Hitachi’s quality minimum requirements. The use of softeners, active anodes or others protective systems will not bring a derogation from Hitachi’s provided warranty.

installations water networks) it is important to cleanse all

12 PMEN0638 rev.0 – 04/2023

ENGLISH

ELECTRICAL AND CONTROL SETTINGS

5 ELECTRICAL AND CONTROL SETTINGS

5.1 GENERAL CHECK
· Make sure that the following conditions related to power supply installation are satisfied:
– The power capacity of the electrical installation is large enough to support the power demand of the system (outdoor unit + indoor unit + DHW tank (if apply)).
– The power supply voltage is within ±10% of the rated voltage.
– The impedance of the power supply line is low enough to avoid any voltage drop of more than 15% of the rated voltage.
· Following the Council Directive 2014/30/EU, relating to electromagnetic compatibility, the table below indicates the Maximum permitted system impedance Zmax at the interface point of the user’s supply, in accordance with EN 61000-3-11.

Model

Power supply

Operation mode

RWLT-3.0VN1E

HYDRO FREE
HYDRO FREE with DHW tank heater

RWLT-5.0VN1E RWLT-10.0VN1E

HYDRO FREE
HYDRO FREE with DHW tank heater 1~ 230V 50Hz HYDRO FREE
HYDRO FREE with DHW tank heater

RWHT-5.0VNF1E

HYDRO FREE
HYDRO FREE with DHW tank heater

Zmax () –
0.27 0.18

· The status of Harmonics for each model, regarding compliance with EN IEC 61000-3-2 and EN 61000-3-12, is as follows:

Status regarding compliance with EN IEC 61000-3-2 and EN 61000-3-12

HYDRO FREE

Equipment complying with EN IEC 61000-3-2 (*): Professional use

–

Equipment complying with EN 61000-3-12
Installation restrictions may be applied by supply authorities in relation to harmonics

RWHT-5.0VNF1E + DHW Tank heater
–

· Check to ensure that existing installation (mains power switches, circuit breakers, wires, connectors and wire terminals) already complies with the national and local regulations.
· The use of the DHW tank heater is disabled as factory setting. If it is desired to enable the DHW tank heater operation during normal indoor unit operation, adjust the DSW4 pin 3 of the PCB1 to the ON position and use the adequate protections. Refer to the DIP switches and RSW switches setting chapter for the detailed information.

? NOTE
The data corresponding to DHW tank heater is calculated in combination with the domestic hot water tank accessory “DHWT-(200/300)S-3.0H2E”.

13 PMEN0638 rev.0 – 04/2023

ELECTRICAL AND CONTROL SETTINGS

5.2 SYSTEM WIRING DIAGRAM
Connect the units according to the following electric diagram:
TB : Terminal board CB : Circuit breaker ELB : Earth leakage breaker

: Field wiring : Field-supplied 1,2 : Outdoor-Indoor communication

SET FREE Outdoor unit

H-LINK operating Line (Twisted shielded pair cable or
shielded pair cable) DC5V (Non-Pole Transmission,
H-LINK system)

H-LINK

HYDRO FREE
LCD Controller PC-ARFWE
DHW tank Optional
? NOTE
For H-LINK transmission wiring use twist pair wires. The wiring must consist of 2-core wires (Do not use wire with more than 3 cores). Use shielded wires for intermediate wiring to protect the units from noise interference, with a length of less than 300 m and a size in compliance with local codes. In the event that a conduit tube for field-wiring is not used, fix rubber bushes to the panel with adhesive.
! CAUTION
Ensure that the transmission wiring is not wrongly connected to any live part that could be damaged the PCB.
14 PMEN0638 rev.0 – 04/2023

ENGLISH

ELECTRICAL AND CONTROL SETTINGS

5.3 WIRING SIZE AND MINIMUM REQUIREMENTS OF THE PROTECTION DEVICES
! CAUTION
· Check to ensure that the field supplied electrical components (mains power switches, circuit breakers, wires, connectors and wire terminals) have been properly selected according to the electrical data indicated on this chapter and they comply with national and local codes. If it is necessary, contact with your local authority in regards to standards, rules, regulations, etc.
· Use a dedicated power circuit for the indoor unit. Do not use a power circuit shared with the outdoor unit or any other appliance.

Use wires which are not lighter than the polychloroprene sheathed flexible cord (code designation 60245 IEC 57).

Model

Power supply

Heating operation mode

Max. current
(A)

Power supply cables
EN 60335-1

Transmitting Actuator

cables

cables

EN 60335-1 EN 60335-1

CB (A)

HYDRO FREE

5.0 2 x 0.75 mm² + GND

5

RWLT-3.0VN1E 1~ 230V 50Hz HYDRO FREE with DHW tank heater

14.5

2 x 2.5 mm² + GND

16

HYDRO FREE

5.0 2 x 0.75 mm² + GND

5

RWLT-5.0VN1E

1~ 230V 50Hz HYDRO FREE with DHW tank heater
HYDRO FREE

14.7 2 x 2.5 mm² + GND

5.0

2 x 0.75 mm² + GND

2 x 0.75 mm2

2 x 0.75mm2 + GND

16 5

RWLT-10.0VN1E 1~ 230V 50Hz HYDRO FREE with DHW tank heater

15.0

2 x 2.5 mm² + GND

16

HYDRO FREE

28

2 x 6 mm² + GND

32

RWHT-5.0VNF1E 1~ 230V 50Hz HYDRO FREE with DHW tank heater

42

2 x 10mm² + GND

50

ELB (no. of poles/A/mA) 2/40/30 2/40/30 2/40/30 2/40/30 2/40/30 2/40/30 2/40/30 2/63/30

? NOTE
· The data corresponding to DHW tank heater is calculated in combination with the domestic hot water tank accessory “DHWT-(200/300)S-3.0H2E”. · When using a DHW tank other than those from Hitachi, the maximum connectable heater load is 3 kW (connected to TB2 terminals 30-31). · Electric fuses can be used instead of magnetic Circuit Breakers (CB). In that case, select fuses with similar rated values as the CB. · The Earth Leakage Breaker (ELB) mentioned on this manual is also commonly known as Residual Current Device (RCD) or Residual Current
Circuit Breaker (RCCB). · The Circuit Breakers (CB) are also known as Thermal- Magnetic Circuit Breakers or just Magnetic Circuit Breakers (MCB).
! CAUTION
· Ensure specifically that there is an Earth Leakage Breaker (ELB) installed for the units (outdoor and indoor unit). · If the installation is already equipped with an Earth Leakage Breaker (ELB), ensure that its rated current is large enough to hold the current of the
units (outdoor and indoor unit).

5.4 TRANSMISSION WIRING BETWEEN OUTDOOR AND INDOOR UNIT
· The transmission is wired to terminals 1-2. · The H-LINK II wiring system requires only two transmission cables that connect the indoor unit and the outdoor unit.

12

Indoor unit

1 2 Outdoor unit
· Use twist pair wires (0.75 mm²) for operation wiring between outdoor unit and indoor unit. The wiring must consist of 2-core wires (Do not use wire with more than 3 cores).
· Use shielded wires for intermediate wiring to protect the units from noise interference, with a length of less than 300 m and a size in compliance with local codes.
· In the event that a conduit tube for field-wiring is not used, fix rubber bushes to the panel with adhesive.
! CAUTION
Ensure that the transmission wiring is not wrongly connected to any live part that could be damaged the PCB.
15 PMEN0638 rev.0 – 04/2023

ELECTRICAL AND CONTROL SETTINGS

5.5 OPTIONAL INDOOR UNIT WIRING (ACCESSORIES)
Summary of the terminal board connections (TB2)

RWLT

RWHT

.

EBOX

16 PMEN0638 rev.0 – 04/2023

1000012056

ENGLISH

ELECTRICAL AND CONTROL SETTINGS

Mark

Part name

N 1~ 230V 50Hz
L1 L2
L3

1 H-LINK commutation
2

3 H-LINK communication for remote 4 control switch

5 DHW tank’s thermistor

6 Common thermistor

7

Thermistor for water outlet temperature of second cycle

8

Thermistor for water outlet temperature after hydraulic separator

9 Common thermistor

10

Thermistor for swimming pool water temperature

11

Thermistor for second ambient temperature

13 Common line

14 Input 1 (Demand ON/OFF) (*)

15 Input 2 (ECO mode) () 16 Common line 17 Input 3 (Swimming pool) () 18 Input 4 (Solar) (*)

19 Input 5 (Smart function) (*)

20 Input 6 (DHW boost) (*)

21 Input 7 (Power meter)

22 Aquastat security for circuit 1 (WP1)
23 24(C) Mixing valve close 25(O) Mixing valve open 26(N) N Common

27(L) Water Pump 2 (WP2)

28 29 30(N) 31(L)

Aquastat security for circuit 2 (WP2) Electrical Heater DHW Output

32(C) 3-way valve for DHW tank

33(L) Line 34(N) Common Line

Description TERMINAL BOARD 1 (TB1)
Main power supply connection
TERMINAL BOARD 2 (TB2) The H-LINK transmission has to be done between the indoor unit and the terminals 1-2 of either outdoor unit and central devices.
Terminals for the connection of the HYDRO FREE unit controller.
The DHW sensor is used to control the temperature of the domestic hot water tank. Common terminal for thermistor. The sensor is used for the second temperature control and should be positioned after the mixing valve and the circulation pump.
Water sensor for hydraulic separator, buffer tank or boiler combination.
Common terminal for thermistors. The sensor is used for the swimming pool temperature control and should be positioned inside plate heat exchanger of the swimming pool. The sensor is used for the second ambient temperature control and it should be positioned outdoors. Terminal Line common for input 1 and input 2. The air to water heat pump system has been designed to allow the connection of a remote thermostat to effectively control your home’s temperature. Depending on the room temperature, the thermostat will turn the split air to water heat pump system ON and OFF. Available signal which allows to reduce the water setting temperature of circuit 1, circuit 2 or both. Terminal Line common for inputs 3, 4, 5, 6, 7. Only for swimming pool installations: It is necessary to connect an external input to the air to water heat pump to provide signal when the water pump of swimming pool is ON. Available input for Solar combination with Domestic Hot Water Tank. For the connection of an external tariff switch device to switch OFF the heat pump during peak electricity demand period. Depending on the setting, the heat pump or DHWT will be blocked when signal is open/closed. Available input for an instantaneous heating of the domestic hot water of the tank. The measuring of the real power consumption can be done connecting an external power meter. The number of pulses of the power meter is a variable which must be set. By this, every pulse input is added into corresponding operation mode. Two possible options: – One power meter for all installation (IU+OU). – Two separated power meters (one for IU and one for OU). Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for controlling water temperature of the circuit 1.
When a mixing system is required for a second temperature control, these outputs are necessary to control the mixing valve.
When there is a second temperature application, a secondary pump is the circulating pump for the secondary heating circuit. Terminals intended for the connection of the Aquastat security accessory (ATW-AQT-01) for controlling water temperature of the circuit 2.
If DHW tank contains an electric heater, the air to water heat pump can activate it if the heat pump cannot achieve the required DHW temperature by itself. The air to water heat pump can be used to heat DHW. This output will be on when DHW is activated. Common terminal for the 3-way valve for DHW tank. Line terminal for the 3-way valve for DHW tank and swimming pool. Terminal line common for 3-way valve of DHW tank and outputs 1 and 2.

17 PMEN0638 rev.0 – 04/2023

ELECTRICAL AND CONTROL SETTINGS

Mark

Part name

35(C)

Output 1 (3-way valve for swimming pool) (*)

36(L) Output 2 (Water pump 3 (WP3)) (*)

37
Output 3 (Auxiliary boiler or electric 38 heater) (*)

39 Output 4 (Solar) (*)
40

Description The air to water heat pump can be use to heat swimming pool. This output will be ON when swimming pool is activated. When there is a hydraulic separator or buffer tank, additional water pump (WP3) is needed.
The boiler can be used to alternate with the heat pump when the heat pump cannot achieve the required temperature by itself.
A water electric heater (as accessory) can be used to provide the additional heating required on the coldest days of the year.
Output for solar combination with Domestic Hot Water Tank.

? NOTE
(*): Inputs and outputs explained in the table are the factory-set options. By means of the unit controller, some other inputs and outputs functions can be configured and used. Please, refer to the Service Manual for detailed information.

5.6 SETTING OF DIP SWITCHES AND RSW SWITCHES
5.6.1 Location of DIP switches and rotary switches

18 PMEN0638 rev.0 – 04/2023

ENGLISH

ELECTRICAL AND CONTROL SETTINGS

5.6.2 Function of DIP switches and rotary

switches

Unit and installation pipes antifreeze

? NOTE

protection 78

· The mark “” indicates the dip switches positions. · No mark “” indicates pin position is not affected.

Standard / ECO water pump operation

· The figures show the settings before shipment or after selection.

78

· “Not used” means that the pin must not be changed. A malfunction

might occur if changed.

! CAUTION

Electric heater or boiler emergency mode 78

Before setting dip switches, first turn the power supply OFF and then set

the position of dip switches. If the switches are set without turning the power supply OFF, the contents of the setting are invalid.

DHW tank’s heater operation

DSW1: Additional setting 0
Factory setting. No setting is required.

78
Open SV1/2 for vacuum and R-410A refrigerant recovery function

HYDRO FREE Low Temperature

DHW 3-way valve forced ON. After vacuum has finsihed set pin to OFF.

78

HYDRO FREE High Temperature

DSW2: Unit capacity setting
Factory setting. No setting is required.

3.0 HP

5.0 HP

10.0 HP

DSW3: Additional setting 1
Depending on the Outdoor series is selected to be combined with Hydro Free (software H-204), it is necessary to set into Hydro Free’s PCB the DSW3 Pin 1 as follows.

Disabled R-134a compressor (RWHT) 78
! CAUTION
· Never turn all DSW4 dip switch pins ON. If this happens, the software of the unit will be removed.
· Never activate “Heater Forced OFF” and “Electric heater or boiler emergency mode” at the same time.
DSW5: Additional setting 3
In the cases where the outdoor unit is installed into a location where its own outdoor ambient temperature sensor can not give a suitable temperature measurement to the system, it is available the 2nd outdoor ambient temperature sensor as accessory. By means of DSW1 and 2 setting, the preferable sensor for each circuit can be selected.
Factory setting

Factory setting

Outdoor unit sensor for circuits 1 and 2.

SET FREE Sigma / Air365 Max (Pro) SET FREE Mini
DSW4: Additional setting 2
Factory setting Heater forced OFF

Outdoor unit sensor for circuit 1; Auxiliary sensor for circuit 2.

Auxiliary sensor for circuit 1; Outdoor unit sensor for circuit 2.

Auxiliary sensor instead of outdoor unit sensor for both circuits.

78

Use the maximum temperature value

between Two3 (boiler / heater thermistor) and

Two (water outlet thermistor) for water control

78

19 PMEN0638 rev.0 – 04/2023

ELECTRICAL AND CONTROL SETTINGS

DSW6: Not used
Factory setting (Do not change)
DSW7: Not used
Factory setting (Do not change)

Example of system setting with a value of: 16
DSW16 & RSW1: Unit number setting
It is required to change factory default setting, with any value from 0 up to 63. The address number must be unique for each unit (in the same refrigerant cycle).

DSW8: Connection ratio
When the connection ratio is > 180% DSW8 pin 3 must be set in the Outdoor Unit as follow.
Factory setting (Do not change)

Factory setting
Example of system setting with a value of: 5
SSW1: Remote/Local

SET FREE Sigma / Air365 Max (Pro) SET FREE Mini

Factory setting (Remote operation)

Remote Local

DSW18: Additional setting 5 (Capacity control
function for HYDRO FREE High Temperature only)
This function allows the capacity control by modifying the start and stop conditions of the second cycle, depending on the heat load of the installation when the water temperature is low.

Local operation

Remote Local

SSW2: Setting not required

Factory setting (Do not change)

Factory setting
Normal power at start (Medium heat load at low water temperature)
High power at start (High heat load at low water temperature)
Low power at start (Low heat load at low water temperature)
Very high power at start (Very high heat load at low water temperature)
DSW15 & RSW2: refrigerant cycle number
setting It is required to change factory default setting, with a value of up to 63. In the same refrigerant cycle, set the same refrigerant cycle number for the outdoor unit and the indoor unit.

5.6.2.1 LED indication

Name LED1

Colour Green

Indication Power indication

LED2

Red

Power indication

LED3

Red

Heat pump operation (thermo ON/OFF)

LED4 LED5

Yellow Green

Alarm (flickering with 1 sec interval) Inverter transmission (RWHT only)

LED6

Yellow H-LINK transmission

LED7

Yellow H-LINK transmission for unit controller

5.6.2.2 GS Optional function
For SET FREE Sigma / Air365 Max (Pro) models combined with Hydro Free, it is necessary to configure GS Optional function if the requirement is to work over 21ºC Outdoor ambient temperature in Heating mode.
For SET FREE mini series models combined with Hydro Free, this GS Optional Function is not required in order to work over 21ºC Outdoor ambient temperature in Heating mode.

Factory setting

20 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT INSTALLATION

6 UNIT INSTALLATION
6.1 GENERAL NOTES
6.1.1 Components at receipt
HYDRO FREE Low Temperature

HYDRO FREE High Temperature

? NOTE
For outdoor unit installation information, please refer to the outdoor unit Installation and operational manual.
6.1.2 Selection of the installation location

The indoor unit of the split system with air to water heat pump must be installed following these basic requirements:
· The indoor unit is intended to be installed in an indoor place and for ambient temperatures ranging 5~30°C. The ambient temperature around the indoor unit must be >5°C to prevent water from freezing.
· The unit is prepared to be wall mounted (wall bracket is factory supplied), so make sure that selected wall is flat and is made of a non-combustible surface, strong enough for supporting the indoor unit weight.
· Be sure to maintain the recommended servicing space for future unit servicing and guarantee enough air circulation around the unit (See “3.1 Service space” section).
· Take into account that two shut-off valves (factory supplied) must be installed at the indoor unit inlet/outlet connections.
· Keep water draining provisions. The safety valve and the air purge are provided with a drain pipe which are located at the bottom side of the unit.

· Protect the indoor unit against the entry of small animals (like rats) which could making contact with the wires, the drain pipe, electrical parts and may damage unprotected parts, and at the worst, a fire will occur.
· Install it in a no-frost environment.
· Do not install the indoor unit in a location with very high humidity.
· Do not install the indoor unit where electromagnetic waves are directly radiated to the electrical box.
· Install the unit in a place where in case of water leakage, any damage to the installation space cannot be produced.
· Install noise filter when the power supply emits harmful noises.
· To avoid fire or explosion, do not install the unit in a flammable environment.
· The air to water heat pump must be installed by a service technician. The installation must comply with local and European regulations.
· Try to avoid to put any objects or tools above the indoor unit.

21 PMEN0638 rev.0 – 04/2023

UNIT INSTALLATION

6.1.3 Unpacking

All units are supplied with a wooden base, packed by a cardboard box and plastic bag.

Firstly to unpack it, place the unit on the assembly area as close
as possible to its final installation location, to avoid damages in transport. Two persons are required.

Carton assembly

Strapping bands

? NOTE

· The previous accessories are supplied inside the packing assembly (besides the indoor unit).
· Additional refrigerant piping (field supplied) for connections to outdoor unit needs to be available.
· If some of these accessories are not packed with the unit or any damage to the unit is detected, please contact your dealer.

6.1.5 Indoor unit main parts (Descriptions)

RWLT

Nº

Part

1

1 Cut the strapping bands and remove the adhesive tapes.

1 Indoor unit service cover

2 Remove the carton assembly and then the plastic bag around the unit.

Wooden

2 Unit controller frame 2 3

3 Unscrew the 4 screws which

base

fix the unit to the wooden

Strapping RWLT

3 Unit controller

base.

bands

4 Remove the indoor unit from the wooden base and place

4 Piping connections 4

it carefully on the floor, as near as possible to its final location.

Carton assembly

RWHT

Nº

Part

6

2 1 Indoor unit front cover

Wooden

2 Indoor unit upper cover

4

base RWHT

3 Indoor unit left cover

3

5

! CAUTION

4 Indoor unit right cover 5 Indoor unit back cover

· Be careful with the Installation and Operation manual and with the factory- supplied accessories box located besides the unit.

6 Piping connections

1

· Two people are required when lifting because of the weight of the unit.

6.1.4 Factory-supplied indoor unit components

Accessory
Shut-off valve (3HP: 1″)
(5-10HP: 1-1/4″)
Gasket
Wall support (Only for RWLT)
Instruction manual
Declaration of conformity

Image –

Qty.

Purpose

To make easier the installation work in the 2 space heating water inlet/ outlet connections. For a
better servicing.

Two gaskets for each space

4

heating connections

(inlet/outlet)

1

For hanging the unit on the wall

1

Basic instructions for the installation of the device.

1

–

22 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT INSTALLATION

6.2 INSTALLATION OF HYDRO FREE LOW TEMPERATURE

6.2.1 Removing the indoor unit service cover

6.2.2 Removing indoor unit electrical box

? NOTE
The indoor unit service cover needs to be removed for any task inside the indoor unit.
1 Unscrew the 2 screws which fixes the frame of the unit controller to the indoor unit service cover.

! DANGER
· Disconnect the unit from the power supply before touching any of the parts in order to avoid an electrical shock.
· Do not touch the switch for DHW tank heater operation when handling the electrical box. Keep the position of this switch in factory setting position (“Automatic” operation).

Switch (SW1)

Indicative label

2 Slide the service cover slightly upward and remove it pulling to back.

RWLT-3.0VN1E
1 Remove the indoor unit service cover as explained above. 2 Unscrew the 2 front screws of the electrical box cover and
then, rotate it.

! CAUTION
· Take care with the LCD display of the unit controller while removing the frame.
· Pay attention of no falling off the service cover. · Take care when removing service cover; the parts inside the unit
could be hot.

! CAUTION
Take care with the electrical box components in order to avoid damaging it.

23 PMEN0638 rev.0 – 04/2023

UNIT INSTALLATION
RWLT-(5.0-10.0)VN1E 1 Remove the indoor unit service cover as explained above. 2 Unscrew the 4 front screws of the electrical box cover and
then, remove it.

3 Fix the indoor unit at the bottom side using the 4 screws which had been previously removed during the unpacking procedure.

! CAUTION

Take care with the electrical box components in order to avoid damaging it.

6.2.3 Installation procedure

? NOTE

Please, try to perform all this procedure following all the steps in the exact order in which they are presented below.

1 Wall mounting procedure 2 Space heating pipes connection 3 Drain pipes connection 4 Refrigerant piping connection 5 Power and transmission wiring connection 6 Cover assembly 7 Test and check
6.2.4 Wall mounting procedure
1 Fix the wall support (factory-supplied accessory) to the wall using appropriate plugs and screws. Make sure that the wall support is completely levelled.

6.2.5 Space heating pipes connection
The unit is factory supplied with two shut-off valves which have to be connected to the water inlet / outlet connections. With these shut-off valves it is very practical to connect the indoor unit to the heating system by using the factory supplied gaskets just below the valves (G 1″ connection for 3.0HP; G 1-1/4″ connection for 5.0-10.0HP). Then, the space heating installation can be carried out.

2 Hang the indoor unit on the wall support (at least two persons are required in order to lift the unit because of its weight).
24 PMEN0638 rev.0 – 04/2023

Gaskets Shut-off valves

ENGLISH

UNIT INSTALLATION

6.2.6 Drain pipes connection
For a correct drainage, connect the drain pipe for the safety valve to the general draining system.
? NOTE
· The safety valve is activated when water pressure reaches 3 bars. · Drain taps must be provided at all low points of the installation to
permit complete drainage of the circuit during servicing.
6.2.7 Refrigerant piping connection

2 Place the holes on the right side of the indoor unit cover over the back plate hooks (x2 locations). When the right side is centred, repeat the operation on the left side. Put the holes on the left side of the indoor unit cover into the back plate frame hooks (x2 locations).
a) b)

Make the connection of refrigerant pipes respecting the considerations indicated in the outdoor unit technical documentation.
The refrigerant piping connections are flare nut except in case of the gas connection of the 10.0 HP model, which is a brazed connection.
6.2.8 Cover assembly
1 Place the indoor unit service cover at the same level of the wall mounted unit by taking it from the bottom side (one person can perform this operation, during this operation it is possible to rest the cover on the electrical box).

! CAUTION
Take care not to damage the LCD display of the unit controller when installing the frame.
3 Once the 4 hooks are placed into their corresponding cover holes, adjust the cover to the end of the hooks.

4 Fix the user controller frame to the indoor unit service cover using the screws which had been previously removed during the unpacking procedure.

25 PMEN0638 rev.0 – 04/2023

UNIT INSTALLATION

6.3 INSTALLATION OF HYDRO FREE HIGH TEMPERATURE

6.3.1 Removing the indoor unit covers

3 Pull the indoor unit upper cover forward and then remove it.

? NOTE
· Front cover needs to be removed for any task inside the indoor unit. · Back cover does not need to be removed.
Removing the indoor unit front cover

1 Unscrew the 2 fixing screws at the lower side.

2 Pull the indoor unit front cover forward and then remove it.

Removing the indoor unit lateral cover
? NOTE
Pictures refer to the left side cover, but the removal procedure is exactly the same for the right side cover. 1 Remove the indoor unit front cover. 2 Remove the indoor unit upper cover. 3 Unscrew the screws which fix the cover to the indoor unit.

Removing the indoor unit upper cover
1 Remove the indoor unit front cover. 2 Unscrew the 2 upper fixing screws.

4 Remove the indoor unit lateral cover.

26 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT INSTALLATION

6.3.2 Removing indoor unit electrical box

! DANGER

· Disconnect the unit from the power supply before touching any of the parts in order to avoid an electrical shock.

· Do not touch the switch for DHW tank heater operation when handling the electrical box. Keep the position of this switch in factory setting position (“Automatic” operation).

Switch Indicative

(SW1)

label

b. If it is needed, the electrical box can be completely extracted by disconnecting all the necessary wiring. Please, refer to the “Servicing” chapter of the “Service Manual” for the specific instructions.
! CAUTION
Take care with the electrical box components in order to avoid damaging it.
Removing the electrical box cover

In order to access to the electrical components, follow these steps:
1 Remove the indoor unit front cover. 2 Unscrew the 2 front screws and the 2 lower screws which
fixes the electrical box to the unit structure.

Removing the electrical box
If there is a need of accessing to the indoor unit internal parts from the front, follow these steps:
1 Remove the indoor unit front cover. 2 Unscrew the 2 front screws and the 2 lower screws which
fixes the electrical box to the unit structure.

3 Take out the electrical box from the indoor unit until it has passed the edge. Choose one of the following steps:
a. Electrical box can be rotated 90º approximately, making easy the indoor unit component’s accessibility, without the necessity to remove all the electrical box.

27 PMEN0638 rev.0 – 04/2023

UNIT INSTALLATION

6.3.3 Installation procedure
? NOTE
Please, try to perform all this procedure following all the steps in the exact order in which they are presented below.
1 Space heating pipes connection 2 Drain pipes connection 3 Refrigerant piping connection 4 Power and transmission wiring connection 5 User controller wiring connection 6 Levelling procedure 7 Test and check 8 Cover’s assembly
6.3.4 Space heating pipes connection
The unit is factory supplied with two shutdown valves which have to be connected to the water inlet / outlet connections. With these shut-off valves it is very practical to connect the indoor unit to the heating system by using the factory supplied gaskets just below the valves (G 1-1/4″ connection). Then, the space heating installation can be carried out.
Shut-off valves
Gaskets

? NOTE
· The safety valve is activated when water pressure reaches 3 bars. · Drain taps must be provided at all low points of the installation to
permit complete drainage of the circuit during servicing.
6.3.6 Refrigerant piping connection
Make the connection of refrigerant pipes respecting the considerations indicated in the outdoor unit technical documentation. The refrigerant piping connections are flare nut.
6.3.7 User controller wiring connection
The HYDRO FREE user controller has to be requested as accessory (PC-ARFWE).
1 Connect the user controller wires to the terminals 3 and 4 of the TB2 of the indoor unit.
2 Pass the wires through the cord bands placed in the upper side of the indoor unit (left or right side) and take them out through the holes on the rear side of the indoor unit.
? NOTE
Try to keep the maximum possible distance between the user controller wire the power cables. 3 Finally, fix the user controller to the wall at an optimum height as explained in its Instruction manual.
6.3.8 Levelling procedure

Once the indoor unit connections have finished, adjust the height of the mounting foot to align perfectly the refrigerant piping outlet to the installation connection.

6.3.5 Drain pipes connection For a correct drainage, connect the drain pipe for the safety valve to the general draining system.
Drain pipe for safety valve

? NOTE
· Adjust only the necessary mounting foot of the unit. · Start with all four feet screwed in as far as possible (factory supplied
position). · Two people are necessary for the levelling procedure.
Follow the process:
Turn the mounting foot to extend the height (use the hexagon or slot designed for this purpose in the shaft end).
! CAUTION
· Take care do not turn the weld nut when turning the mounting foot. Use an slot with a height profile lower than 5 mm.
· Never work on more than one foot at the same time. When finishing, all 4 lock-nuts must be tightened firmly.

Hexagon and slot for help in the

foot adjustment

process

Safety valve

Threaded shaft
Weld nut

Adjust the foot’s height as
needed (2 options)

!

Foot
28 PMEN0638 rev.0 – 04/2023

Extend Take in

ENGLISH

UNIT INSTALLATION

6.4 POWER AND TRANSMISSION WIRING CONNECTION

6.4.1 Safety instructions

6.4.2 Connection procedure

? NOTE
Check the requirements and recommendations in the chapter “5 ELECTRICAL AND CONTROL SETTINGS”.
! DANGER
· Do not connect the power supply to the indoor unit prior to filling the space heating circuit (and DHW circuit if it were the case) with water and checking water pressure and the total absence of any water leakage.
· Do not connect or adjust any wiring or connections unless the main power switch is OFF.
· When using more than one power source, check and ensure that all of them are turned OFF before operating the indoor unit.
· Avoid wiring installation in contact with the refrigerant pipes, water pipes, edges of plates and electrical components inside the unit to prevent damage, which may cause electric shock or short circuit.
! CAUTION
· Use a dedicated power circuit for the indoor unit. Do not use a power circuit shared with the outdoor unit or any other appliance.
· Make sure that all wiring and protection devices are properly selected, connected, identified and fixed to the corresponding terminals of the unit, specially the protection (earth) and power wiring, taking into account the applicable national and local regulations. Establish proper earthing; Incomplete earthing may cause electrical shock.
· Protect the indoor unit against the entry of small animals (like rodents) which could damage the drain pipe and any internal wire or any other electrical part, leading to electric shock or short-circuit.
· Keep a distance between each wiring terminal and attach insulation tape or sleeve as shown in the figure.

Access to the electrical box before performing the next steps:
1 Using the appropriate cable, connect the power circuit to the appropriate terminals as shown on the wiring label and the illustration below. Connect the power supply cables to the terminal board (TB1) , and the earth conductor to the earth screw in the electrical box plate.

TERMINAL BOARD 1 (TB1)

TB1 (1~)

Earth terminal

Power terminal
Power terminals Power supply: 1~ 230V 50Hz

2 Carry out the necessary electrical connections of the optional accessories using the terminal board 2 (TB2). Consult its label for a better understanding.
? NOTE
Refer to the section “5.5 Optional indoor unit wiring (accessories)”. 3 Only for RWLT: Pass the electrical wiring from the TB1 and
TB2 to the lateral holes of the electrical box. Then, fix the cables to the cord bands located at the right side. Finally, take the cables out through the bottom side of the unit.

Tape or sleeve

4 Only for RWHT: Pass the electrical wiring from the TB1 and
TB2 to the upper holes of the electrical box. Then, fix the cables to the cord bands located at the right or left side. Afterwards, route the cables through the back side of the unit and take them out through the holes of the rear side of the indoor unit.

6.5 TEST AND CHECK
Finally, test and check the following items: · Water leakage · Refrigerant leakage · Electrical connection · Air purge

? NOTE
Please refer to the chapters of “4.3.5 Water filling” and “7 COMMISSIONING” in this document and refer the Outdoor unit Installation and Operation manual for the specific details about refrigerant charge tasks.
! DANGER
Do not connect the power supply to the indoor unit prior to filling the space heating circuit (and DHW circuit if it were the case) with water and checking water pressure and the total absence of any water leakage.

29 PMEN0638 rev.0 – 04/2023

COMMISSIONING

7 COMMISSIONING

7.1 BEFORE OPERATION

! CAUTION

· Turn OFF the main switch (Outdoor unit and Indoor unit) when the system is to be stopped for a long period of time: as the oil heater is always energized even when the compressor is not working, there

· Supply electrical power to the system for approximately 12 hours

will be electricity consumption unless the main switch is turned

before start-up after a long shut-off. Do not start the system

OFF. For proper system protection, indoor and outdoor units must

immediately after power supply, it may cause compressor failure

all be energized or de-energized. Leaving a Hydro Free indoor unit

because the compressor is not well-heated.

de-energized while the outdoor unit is running prevents it from self-

· When the system is started after a shut-off longer than approximately

protecting from freezing, thereby damaging the indoor unit.

3 months, it is recommended that the system be checked by your

service contractor.

7.2 PRELIMINARY CHECK

When installation is complete, perform commissioning according to the following procedure, and hand over the system to the customer. Perform the commissioning of the units methodically, and check that the electrical wiring and the piping are correctly connected.
Indoor and outdoor units must be configured by the installer to get the perfect setting and the unit working.

· Check the dip switch settings of the indoor unit and the outdoor unit are connected as shown in the corresponding chapter.
· Check to ensure the electrical wiring of the indoor unit and the outdoor unit are connected as shown in the chapter.
· Check to ensure the external wiring is correctly fixed. To avoid problems with vibrations, noises and cut out wires with the plates.
7.2.3 Hydraulic circuit checking (space heating and DHW)

? NOTE
For the commissioning of the outdoor unit please refer to the outdoor unit installation and operation manual.
7.2.1 Checking the unit
· Check external appearance of the unit to look for any damage due to transportation or installation.
· Check that all the covers are totally closed.
· Check that the recommended service space is respected (see “3.1 Service space” and the outdoor unit Installation and operation manual).
· Check that the unit has been correctly installed onto the wall.
7.2.2 Electrical checking
! CAUTION
Do not operate the system until all the check points have been cleared: · Check to ensure that the electrical resistance is more than 1 M,
by measuring the resistance between ground and electrical parts terminal. If not, do not operate the system until the electrical leakage is found and repaired. Do not impress the voltage on the terminals for transmission and sensors . · Check to ensure that the switch on the main power source has been ON for more than 12 hours, in order to give the oil heater time to warm the compressor. · In three-phase unit check phase sequence connection on terminal board. · Check the power supply voltage (±10% of the rated voltage). · Check that field-supplied electrical components (main switches, breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical specifications given in this document, and check that the components comply with national and local standards. · Do not touch any electrical components for more than three minutes after turning OFF the main switch.

· Check that the circuit has been properly flushed and filled with water and that the installation has been drained: the pressure of the heating circuit must be 1.8 bar.
· Check for any leakage in water cycle. Pay special attention to the water piping connections.
· Make sure the system’s internal water volume is correct.
· Check that the hydraulic circuit’s valves are fully open.
· Check to see that electrical heater is completely filled with water by operating pressure of safety valve.
· Check to see that additional water pumps (WP2 or/and WP3) are correctly connected to terminal board.
! CAUTION
· Operating the system with closed valves will damage the unit. · Check to see that air purge valve is open and that the hydraulic circuit
is air purged. The installer is responsible of completely air purging the installation. · Check that the water pump of the space heating circuit works within the pump operating range and that the water flow is over the pump’s minimum. If the water flow is under 12 litres/minute (6 litres/minute for 3.0HP unit) (with flow switch tolerance), alarm will be displayed on the unit. · Remember that water connection must be accordance with local regulations. · Water quality must comply with EU directive 98/83 EC. · Electrical heater operation when not completely filled with water will damage the heater.
7.2.4 Checking the refrigerant circuit
· Check to ensure that the stop valves on the gas and liquid lines are fully open.
· Check that the size of the piping and the refrigerant charge comply with the applicable recommendations.
· Check the inside of the unit for refrigerant leakage. If there is a refrigerant leak, call your dealer.

30 PMEN0638 rev.0 – 04/2023

ENGLISH

COMMISSIONING

· Check outdoor unit commissioning procedure manual.

7.3 COMMISSIONING PROCEDURE
This procedure is valid regardless of what options are on the module. · When installation is complete and all necessary settings
(Dip-switches in PCBs and user controller configuration) have been carried out, close the electrical box and place the cabinet as shown in the manual. · Make the start-up wizard configuration in the user controller. · Make a test run as shown in item “7.4 Test run / air purge”. · After test run is completed, start the entire unit or the selected circuit by pressing the OK button.
Initial start-up at low outdoor ambient
temperatures
During commissioning and when water temperature is very low, it is important for the water to be heated gradually.

! CAUTION
· Heating at lower water temperatures (approximately 10ºC to 15ºC) and lower outdoor ambient temperatures (<10ºC) can be damaging to the heat pump when defrosting.
· As a result, Heating up to 15ºC when outdoor temperature is lower than 10ºC is performed by the Electrical Heater of DHW.
· It is recommended start the unit (first power ON) with heater forced OFF and compressor forced OFF (See “5.6 Setting of DIP switches and RSW switches”). In order to circulate water by water pump and remove possible air into the heater (Check heater completely filled).
? NOTE
In case of Heater Forced OFF (by optional dip switch setting) these condition is not performed and heating is performed by Heat Pump. Hitachi is not responsible for its operation.

7.4 TEST RUN / AIR PURGE
Test run is a working mode used when commissioning the installation. Some settings are made to let the installer an easy job. Air purge function drives the pump in a way for evacuating air bubbles in the installation. A menu with specific function for commissioning appears by pressing the menu+back buttons for 3 seconds at the installer menu (OK+back buttons).
OK
This menu shows the following test to be launched: · Unit Test Run · Air Purge Procedure
After “Test Run” or “Air Purge Procedure” option is selected, the HYDRO FREE user controller asks for the duration of the test. In case of test run, user has to select the heating mode of the test. When user confirms the test run or the air purge, the HYDRO FREE user controller sends the order to the indoor. During the execution of this test, the following screen is shown:

· When the test starts, the user controller will exit from the installer mode.
· If “favourite action button” is pressed during test run, this function will be executed until the user presses the cancel option (this is not-limited by time).
· User can cancel the test run regardless of the time left for test finishing.
· The Test Run icon is shown in the notifications zone, but the notification of this test run is taken from H-LINK.
When test run has finished, an information message is displayed in the screen, and pressing accept, the user returns to the global view.
? NOTE
· When commissioning and installing the unit, it is very important to use the “Air purge procedure” function to remove all the air in the water circuit. When the air purge function is running, the water pump starts the automatic air venting routine which consists of regulating the speed and open/close configured 3-way valve to help to evacuate air from the system.
· For Outdoor test run, refer to Outdoor Unit Installation Manual.
· If there is a Heater or a Boiler installed, disable the operation before running the test run.

31 PMEN0638 rev.0 – 04/2023

UNIT CONTROLLER

8 UNIT CONTROLLER
? NOTE
HYDRO FREE models are not suitable for cooling mode (only Heating mode available). For installations where are required a Hydro Free in cooling operation please contact with our CSC in order to approve its installations in cooling mode and receive setting instructions.

8.1 DEFINITION OF THE SWITCHES

OK

Liquid Crystal Display

Screen where controller software is displayed.

OK button

To select the variables to be edited and to confirm the selected values.

Arrows key

It helps the user to move through the menus and views.

Run/Stop button

It works for all zones if none of the zones is selected or only for one zone when that zone is selected.
Menu button

It shows the different configuration options of the user controller.

Return button

To return to the previous screen.

Favourite button

When this button is pressed, the selected favourite action (ECO/Comfort, Holiday, Simple timer or DHW boost) is directly executed.

32 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER

8.2 MAIN SCREEN

Depending on the working mode of the user controller, the main screen is shown in a different way. When the user controller is working as a master unit controller, a comprehensive view with all the elements is shown, whereas when the user controller is working as a room thermostat (located in one of the controlled zones), the main screen appears with simplified information.
8.2.1 Comprehensive view

Time and date
The current time/date information is displayed. This information can be changed on the configuration menu.
Operation mode (Heating)
This icon shows the unit’s mode of operation status.
Control of circuits 1 and 2
It displays the setting temperature calculated for each circuit and a throughput icon indicating the percentage of the actual temperature with respect to the setting temperature. It can also show the ECO mode and timer activation if they are enabled.
The setting temperature can be modified using the arrows keys over this view (if Water calculation mode is set as “Fix”).
Pressing the OK button, the following options are shown: – Timer: In this menu, simple timer or schedule timer can
be selected and configured. – OTC: OTC Setting temperature (User can only refer to
the OTC mode and its setting temperature value). – Comfort/ECO: Selection between Comfort and ECO
mode. – Status: Some working conditions can be consulted.
DHW control
It displays the setting temperature calculated for DHW and a throughput icon indicating the percentage of the actual temperature with respect to the setting temperature. It can also show the operation of the electrical heater of the DHW, the timer activation and the DHW boost if they are enabled.
The setting temperature can be modified using the arrows keys over this view.
Pressing the OK button, the following options are shown: – Timer: In this menu, simple timer or schedule timer can
be selected and configured. – DHW boost: It activates the DHW heater for an
immediate DHW operation.

– Status: Some working conditions can be consulted.
If anti-legionella operation is working, its icon appears below the setting temperature.
Swimming pool control
It gives information about the swimming pool setting temperature and displays a throughput icon indicating the percentage of the actual temperature with respect to the setting temperature.
The setting temperature can be modified using the arrows keys over this view.
Pressing the OK button, the following options are shown: – Timer: In this menu, simple timer or schedule timer can
be selected and configured. – Status: Some working conditions can be consulted.
Unit status signals
This part of the screen displays all the notification icons that offer general knowledge on the unit’s situation
Some of these icons can be: Defrost operation, Water pumps, Compressor/s, Boiler working, Tariff input, Test tun…
Outdoor temperature / Alarm indication
In normal operation, the outdoor temperature is displayed besides the home icon signal.
In abnormal operation, the alarm icon is indicated with its corresponding alarm code.
Available buttons / Installer mode
It indicates the buttons of the user controller which can be used in that moment.
When Installer mode is enabled, its icon appears on the right side of this view.

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8.2.2 Room thermostat view

Time and date
The current time/date information is displayed. This information can be changed on the configuration menu.
Definition of the circuit
It informs about which circuit is being indicated (1 or 2).
Actual/Setting room temperature
It displays the actual room temperature. The setting temperature can be adjusted using the up/down arrows keys. In this case, while the setting temperature is being modified, the icon of the actual room temperature is indicated below the setting temperature (house icon).
Room thermostat mode
In this part of the screen, the room thermostat mode can be selected between Manual and Auto. If Auto is selected, two possible icons can be displayed: one if a timer period has been selected and the other one if not.
Operation mode (Heating)
The current operation mode is displayed.
End of timer/holiday operation
In this area, the end hour of the simple timer, holiday period or schedule action is indicated below its respective icon.

Next circuit
It informs that there is a room thermostat view for a second circuit and it is possible to access by pressing the right key.
Icons notification
This part of the screen displays all the notification icons that offer general knowledge on the unit’s situation.
Some of these icons can be: ECO mode, Timer operation…
Outdoor temperature / Alarm indication
In normal operation, the outdoor temperature is displayed besides the home icon signal.
In abnormal operation, the alarm icon is indicated with its corresponding alarm code.
Available buttons / Installer mode
It indicates the buttons of the user controller which can be used in that moment.
When Installer mode is enabled, its icon appears on the right side of this view.

OK button
Pressing the OK button, the quick actions are shown: · Timer: In this menu, simple timer or schedule timer can be selected and configured. · ECO/Comfort: Selection between ECO and Comfort mode. · Holiday: It allows to start a holiday period until the configured returning date and time. · Status: Some working conditions can be consulted.

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8.3 DESCRIPTION OF THE ICONS

8.3.1 Common icons

Icon

Name

Values

Explanation

OFF

Circuit I or II is in Demand-OFF.

Status for circuit 1, 2, DHW and swimming
pool.

Circuit I or II is on Thermo-OFF.
Circuit I or II is working between 0 < X 33% of the desired water outlet temperature.
Circuit I or II is working between 33 < X 66% of the desired water outlet temperature.
Circuit I or II is working between 66 < X 100% of the desired water outlet temperature.

Mode

Heating

88

Setting temperatures
Alarm

Value

Displays the setting temperature of the circuit 1, circuit 2, DHW and swimming pool.
Circuit 1, Circuit 2, DHW or Swimming Pool are stopped by button or timer.

Existing alarm. This icon appears with the alarm code.

Timer

Simple timer Weekly timer

Derogation Installer mode
Menu lock
Outdoor temperature

When there is a derogation from the configured timer.
Informs that user controller is logged on the installer mode which has special privileges.
It appears when menu is blocked from a central control. When indoor communication is lost, this icon disappears.
The ambient temperature is indicated at the right side of this button.

8.3.2 Icons for the comprehensive view

Icon

Name Pump
Heater step DHW Heater

Values

Explanation

This icon informs about pump operation. There are three available pumps on the system. Each one is numbered, and its corresponding number is displayed below to the pump icon when it is operating.

Indicates which of the 3 possible heater steps is applied on space heating.

Informs about DHW Heater operation. (If it is enabled)

Solar

Combination with solar energy.

Compressor

Compressor enabled.

Boiler

Auxiliary boiler is working..

Tariff

Tariff signal informs about some cost conditions of the consumption of the system.

Defrost

Defrost function is active.

Central/Local

– No icon means local mode.
Central mode (Two types of control: Local or Full)

Forced OFF Auto ON/OFF

When forced off Input is configured and its signal is received, all the configured items on the comprehensive view (C1, C2, DHW, and/or SWP) are shown in OFF, with this small icon below.
When daily average is over auto summer switch-off temperature, circuits 1 & 2 are forced to OFF (Only if Auto ON/OFF enabled).

Test Run

Informs about the activation of the “Test Run” function.

Anti-Legionella

Activation of the Anti-Legionella operation.

DHW boost

It activates the DHW heater for an immediate DHW operation.

ECO/Comfort mode for
circuits 1 & 2

– No icon means Comfort mode. ECO mode

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8.3.3 Icons for the room thermostat view

Icon

Name

Values

Manual mode

Explanation

Manual/Auto mode

Auto mode with timer setting

Auto mode without timer setting

Setting/Room temperature

Setting temperature Room temperature

End of timer period End of holiday period Setting temperature
Next screen

The end hour of the timer period is indicated below this icon
The end hour of the holiday period is indicated below this icon
This icon appears while the setting temperature is being changed, and indicates the actual temperature When room thermostat has been configured for both circuit 1 and 2, this icon appears at the right side of the screen to indicated that there is a 2nd room thermostat view

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8.4 CONTENTS

Menu Contents

Level 1 Level 2 Level 3

Level 4

Operation Information

Level 5 Level 6

General

Circuit 1

Circuit 2

DHW

Swimming Pool

Heat Pump Details

Electrical Heater

Boiler Combination

Solar Combination Alarm History

System Configuration General Options

Holiday Mode

Air Eco Offset

Room Thermostats

Thermostat 1

Thermostat 2

Compensation Factors

Circuit 1

Circuit 2

Room Temp Demand OFF

Circuit 1

Circuit 2

Check RT address Central Operation

Timer and Schedule

Circuit 1

Heating (Air / Water)

Timer Type

Simple

Schedule

Schedule

Circuit 2

Heating (Air / Water)

Timer Type

Simple

Schedule

DHW

Timer Type

Simple

Schedule Swimming Pool
Timer Type Simple Schedule
Delete All Timer Configuration Water settings

Space Heating

Level 1 Level 2

Menu Contents

Level 3

Level 4

Level 5 Level 6

Circuit 1

Circuit 2

DHW

SWP

Space Heating

Circuit 1

Water Calculation Mode

Eco offset

Working limits

Circuit 2

Water Calculation Mode

Eco offset

Working limits

Mixing valve DHW
Anti Legionella Swimming Pool

Status Setting Temperature

Offset Temperature Complementary Heating

Heating Source

Electrical Heater

Boiler Combination Solar Combination
Status

Input demand

Total control

Heat Pump

Water Pump Configuration Outdoor average Timer

Minimum ON Time

Minimum OFF Time

Emergency Operation

Seizure Protection

Status

Operation Day

Optional Functions

Starting Time

System

Hydraulic Sep. Status

Smart Function Space Functions
Heating Auto On/Off

DHW

I/O and Sensors

Inputs

Outputs

Auxiliary sensors Controller Settings

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Level 1 Level 2

Menu Contents

Level 3

Level 4

Controller Options Room Name Date and Time
Adjust Date and Time European Summer Time UTC Zone Screen settings
Language selection

Commissioning

Air purge

Start Air purge

Test run

About

Start test run

System Information

Contact Information

Factory Reset

Return to user mode

Level 5

Level 6

Installer mode
Icon means that this menu is available only for installer, a special user with higher access privileges to configure the system. In order to access the controller as Installer, “OK” and ” ” buttons must be pressed for 3 seconds.
OK +
After that, the “Enter password” message is displayed. The login password for the Installer is:
Right , Down , Left , Right
Press “OK” to confirm the password. If the correct access code is entered, the installer mode icon appears on the notifications bar (bottom line).
Installer mode icon
After 30 minutes of inactivity, it is necessary to repeat the log in process. To exit the Installer mode and return to the unit menu, hold down the ” ” button for 3 seconds or go to the “Return to user mode” on the main menu.
? NOTE
The following chapters explain the special settings the Installer can edit. It is important to understand that the Installer can also perform all the actions available for the typical user.

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8.4.1 Advanced Configuration In case of executing the Advanced Configuration, the following screens are displayed. 8.4.1.1 Screen 1: Controller Settings

CODE LCDM LCDL

Description Controller Type Controlled Circuits

buttonAction

Favourite Action

euSumerTime UTC

European Summer Time UTC Zone

Default Value

Range

Controller Settings

Unit

Unit

Room

Unit + Room

Room C1

Room C1 Room C2 Room C1+C2

Eco / Comfort Disabled

Eco/Comfort Holiday Timer
DHW Boost
Enabled / disabled

0

0 ~ 12

8.4.1.2 Screen 2: Space Heating

Steps Units

Notes

–

–

–

–

If Controller type (LCDM) “Room” or “Unit+Room”

Holiday only if Controller type

–

–

(LCDM) “Room”. To enable “DHW Boost” option, go to the next screen

and select Status (DHWs)=”Enabled”

1

–

1

–

If European summer time (euSumerTime) is “Enabled”

CODE
C1WC
C2WC DHWs SWP HES SOLStSet

Description
Circuit 1
Circuit 2 DHW
Swimming Pool Heating source Solar Combination

Default Value Space Heating
Fix
Disabled Disabled Disabled HP Only
Disabled

Range
Disabled Points
Gradient Fix
Disabled Points
Gradient Fix
Disabled / Enabled
Disabled / Enabled
HP Only HP + EH HP + Boiler
Disabled Input demand Total control

Steps

Units

Notes
If Controller type (LCDM) is selected “Room” or “Unit+Room”

–

–

–

–

–

–

–

–

–

–

If Status (DHWs) is “Disabled” this

–

– parameter is forced to “Disabled” and

it is not displayed

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UNIT CONTROLLER

8.4.1.3 Screen 4: External Elements

CODE

Description

Default Value External Elements

Range

RTType1

Thermostat 1

None

None Wired

RTType2

Thermostat 2

None

–

Check RT Address

–

None Wired
–

Steps –

Units –

Notes
If Controller type (LCDM) is selected as “Unit” or “Unit + Room”.
Visible only if Controller type (LCDM)= “Unit” or Controller type (LCDM)= “Unit + Room and Controlled circuits (LCDL)= Room C2”.
Visible only if Controller type (LCDM)= “Unit” or Controller type (LCDM)=”Unit

• Room” and Controlled circuits (LCDL)= “Room C1”.
  Only available if RTType= “Wired” and Controller type (LCDM)= “Unit + Room”

? NOTE
Wizard can be re-launched by doing a factory reset (available only for Installer mode).
8.5 MENU NAVIGATION
? NOTE
This chapter explains navigation through the menus of the controller. For more specific information about particular options in these menus, refer to the chapters Control system and Optional functions at the Service Manual. In order to access to the main menu, press ” ” the button.
The main menu contains the following features: · Operation information · System configuration · Controller settings · Commissioning · About · Factory reset · Return to user mode

: Available only for installer.
8.5.1 Operation information
In this sub-menu, the current information about the performance of the unit is displayed.
“Operation information” contains the following features: · General · Circuit 1 (1) · Circuit 2 (2) · DHW (3) · Swimming Pool (4) · Heat Pump Details · Electrical Heater (5) · Boiler Combination (6) · Solar Combination (*7) · Alarm History

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? NOTE
· (1): If Water calculation mode for circuit 1 heating (C1WC) not “Disabled”. · (2): If Water calculation mode for circuit 2 heating (C2WC) not “Disabled”. · (3): If Status (DHWs)= “Enabled”. · (4): If Status (SWP)= “Enabled”. · (5): If Heating source (HES)= “HP+EH”. · (6): If Heating source (HES)= “HP+Boiler”. · (*7): If Solar combination (SOLStSet)= “Input demand” or “Total”.
The next list shows the parameters that can be consulted on the display. All of them are read-only. Most of these variables are the same ones that can be consulted by 7-segment, taking information from the outdoor and indoor unit.
? NOTE
All the operation parameters are able to be displayed by the installer but normal user can only display the basic ones.
8.5.1.1 General

REF

Access

Description

OPST
HPTi HPTo OPst OPTa OPTa2 OPTav OPTa2v av24SwOff

Operation Status
Water Inlet T Water Outlet T Water Setting T Outdoor Ambient T Outdoor Ambient 2 T Outdoor Ambient Average T Second Ambient Average T 24h average T

Default Value General
OFF
–

Range
Heat D-OFF Heat T-OFF
Heat ON DHW OFF DHW ON SWP OFF SWP ON
Alarm
–
–
–

Steps

Units

Notes

–

–

–

–

ºC

–

–

ºC

–

–

ºC

–

–

ºC

–

–

ºC

–

–

ºC

–

–

ºC

–

–

ºC

(*1)

? NOTE
(*1): If (Status (AutoST) or Status (AHC)”Enabled”) and Controller type (LCDM)= “Unit” or “Unit + Room” in the Wizard Configuration.

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8.5.1.2 Circuit 1

REF

Access

Description

C1Op C1Mo C1Rt C1Rs HPTo C1TC C1OTCs

Operation Mode Room T Room setting T Current Water T Water Setting T Water OTC Setting T

Default Value Circuit 1
–

Range

Steps

Demand ON/OFF

–

Comfort/ECO

–

–

–

–

–

–

–

–

–

–

–

Units
ºC ºC ºC ºC ºC

Notes
(1) (1) –

? NOTE
(*1): Only available if one of the following conditions is satisfied: · If (Controller type (LCDM))= “Unit” or “Unit+Room” and:
– When (Thermostat type (RTType))= “Wired”: “Check RT address” function found a PC-ARFWE with Controlled circuits (LCDL) (Controlled Circuits)= “Room C1” or “Room C1+C2”.
· If (Controller type (LCDM))= “Room” or “Unit+Room” and (Controlled circuits (LCDL))= “Room C1” or “Room C1+C2”. · If (Central mode (COT))= “Air” or “Full” and “Room Thermostat” for C1 configured on central device.
8.5.1.3 Circuit 2

REF

Access

Description

C2Op C2Mo C2Rt C2RS C2Two C2TC C2OTCs C2MVP

Operation Mode Room Temp Room Setting T Current Water T Water Setting T Water OTC Setting T Mixing Valve Position

Default Value Circuit 2
–

Range

Steps

Demand ON/OFF

–

Comfort/ECO

–

–

–

–

–

–

–

–

–

–

–

–

–

Units
ºC ºC ºC ºC ºC %

Notes
(1) (1) –

? NOTE
(*1): Only available if one of the following conditions is satisfied: · If Controller type (LCDM)= “Unit” or “Unit+Room” and:
– When (Thermostat type (RTType))= “Wired”: “Check RT address” function found a PC-ARFWE with (Controlled circuits (LCDL))= “Room C2” or “Room C1+C2”.
· If (Controller type (LCDM))= “Room” or “Unit+Room” and (Controlled circuits (LCDL))= “Room C2” or “Room C1+C2”. · If (Central mode (COT))= “Air” or “Full” and “Room Thermostat” for C2 configured on central device.

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UNIT CONTROLLER

8.5.1.4 DHW

Available if Status (DHWs)= “Enabled” in “DHW” option of the “System Configuration” menu.

REF

Access

Description

DHWOp DHWt DHWst
DHWSHst DHWHOp DesFun DHWAOp

Operation Current Temperature Setting Temperature El.Heater Status El.Heater Op Legionella Status Legionella Op.

Default Value DHW
–

Range
Demand ON/OFF –
Enabled/Disabled Demand ON/OFF Enabled/Disabled Demand ON/OFF

Steps
–

Units
ºC ºC –

Notes
–

8.5.1.5 Swimming Pool

Available if Status (SWP)= “Enabled” in “Swimming Pool” option of the “System Configuration” menu.

REF
swpOp SWPt SWPst

Access

Description

Operation Current Temperature Setting Temperature

Default Value Swimming Pool
–

Range

Steps

Demand ON/OFF

–

–

–

–

–

Units
ºC ºC

Notes
–

8.5.1.6 Heat Pump Details

REF
HPWF HPWP OPTa OPTa2 HPTg HPTI HPTd HPTd2 HPTe HPTs HPPd HPPd2 HPPs HPEVI HPEVI2 HPEVO HPH4 HPH42 HPDEF HPDI HPP1 HPP1r134 Uspec
Utype

Access

Description Water Flow Level

Default Value Heat Pump Details
–

Water Pump Speed

–

Outdoor Ambient T

–

Outdoor Ambient 2 T

–

Gas T (R410A)

–

Liquid T (R410A)

–

Discharge Gas T (R410A)

–

Discharge Gas T (R134a)

–

Evaporation Gas T (R410A)

–

Suction Gas T (R134a)

–

Discharge Pressure (R410A)

–

Discharge Pressure (R134a)

–

Suction Pressure (R134a)

–

Ind. Exp. Valve Open.

–

Ind. Exp. Valve 2 Open.

–

Out. Exp. Valve Open.

–

Inverter Op. Freq. (R410A)

–

Inverter Op. Freq. (R134a)

–

Defrosting

–

Cause Of Stoppage

–

Compressor Curr. (R410A)

–

Compressor Curr. (R134a)

–

Unit capacity

–

Unit Type

–

Range

Steps

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

HYDRO FREE LT HYDRO FREE HT

–

Units
m3/h % ºC ºC ºC ºC ºC ºC ºC ºC
MPa MPa MPa
% % % Hz Hz A A HP
–

Notes
Only for RWHT Only for RWHT Only for RWHT Only for RWHT Only for RWHT Only for RWHT Only for RWHT –
–

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8.5.1.7 Electrical Heater

Available if Heating source (HES)= “HP+Heater” in the “Complementary Heating” option of the “System Configuration” menu.

REF
EHOp EHt EHst EHLF
EHstp

Access

Description

Operation Current Temperature Setting Temperature Load Factor Step

Default Value Electrical Heater
–

Range

Steps

Demand ON/OFF

–

–

–

–

–

0~100%

–

0/1/2/3

–

Units
ºC ºC % –

Notes
–

8.5.1.8 Boiler Combination

Available if Heating source (HES)= “HP+Boiler” in the “Complementary Heating” option of the “System Configuration” menu.

REF
BOOp BOt BOst

Access

Description
Operation Current Temperature Setting Temperature

Default Value Boiler Combination
–

Range

Steps

Demand ON/OFF

–

–

–

–

–

Units
ºC ºC

Notes
–

8.5.1.9 Solar Combination
Available if Solar combination (SOLStSet)= “Input demand” or “Total” In the “Complementary Heating” option of the “System Configuration” menu.

REF
SOLOp SOlPt

Access

Description

Operation SOL Panel T

Default Value Solar Combination
–

Range

Steps

Demand ON/OFF

–

–

–

Units
ºC

Notes
(*1)

? NOTE
(1): If Solar combination (SOLStSet)= “Total control”
8.5.1.10 Alarm History
It shows the alarms of the system. To clear the selected alarms press ” “. 8.5.2 System Configuration
“System configuration” contains the following features: · General Options · Timer and Schedule · Water settings () · Space Heating · DHW · Swimming Pool · Complementary Heating · Heat Pump · Optional Functions · I/O and Sensors

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UNIT CONTROLLER
? NOTE
()This option is availbale only when the controller is set as “Room Thermostat”.
8.5.2.1 General Options
· Holiday Mode (1)(3) · Air Eco Offset (1) · Room Thermostats (2) · Central Operation (2)

? NOTE
· (1): If Controller type (LCDM)= “Room” or “Unit + Room”. · (2): If Controller type (LCDM)= “Unit” or “Unit + Room”. · (*3): Only for slave PC- ARFWE.
Holiday Mode

REF
absentYear absentMonth
absentDay absentTime absentSetting
–

Access

Description

Year Month Day Returning time Setting Temperature Start holiday mode Stop holiday mode

Default Value Holiday Mode
2015 1 1
0:00 21 No No

Range
1-12 1-31 0:00 ~23:50 5 – 35 No/Yes No/Yes

Steps
1 1 00:10 1 –

Units
Months
Days Min. ºC
–

Notes
(1) (2)

? NOTE
· (1): If “Holiday mode” is not operating. · (2): If “Holiday mode” is operating.
Air Eco Offset

REF

Access

Description

c1RTEcoOffset C2RTEcoOffset

Circuit 1 Circuit 2

Default Value Air Eco Offset
3
3

Range
1-10 1-10

Steps
1 1

Units
–

Notes (1) (2)

? NOTE
· (1): If Controlled circuits (LCDL)= “Room C1” or “Room C1+C2”. · (2): If Controlled circuits (LCDL)= “Room C2” or “C1+C2”.

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UNIT CONTROLLER
Room Thermostats
Available if Controller type (LCDM)= “Unit” or “Unit + Room”.

· Thermostat 1 (1) · Thermostat 2 (1) · Compensation Factors (2) · Room Temp Demand OFF (2) · Check RT Address (*3)

? NOTE
· (1):Visible only if Controller type (LCDM)= “Unit”. · (2): If circuit 1 or 2 are Wired or Central Mode (COT)= “Air or Full”. · (*3): If Thermostat type (RTType)= “Wired” and Controller type (LCDM)= “Unit” or “Unit + Room”.

REF RTType1

Access

Description

Default Value

Room Thermostats

Thermostat 1

None

RTType2
–

Thermostat 2
Compensation factors Room Temperature Demand OFF Check RT Address

None
2 –

Range
None Wired None Wired 1-12
–

Compensation Factors

Steps
–

Units
–

Notes
–
–

· Circuit 1 (1) · Circuit 2 (2)

? NOTE
· (1): If Water calculation mode for circuit 1 in heating (C1WC) is not “Disabled”. · (2): If Water calculation mode for circuit 2 in heating (C2WC) is not “Disabled”.
Circuit 1

REF

Access

Description

Rfacth1 Maxfacthp1 Maxfacthn1

Compen.Factor Heat Max Compen.Factor Heat + Max Compen.Factor Heat –

Default Value Circuit 1
2 10 -10

? NOTE
(*1): If Water calculation mode for circuit 1 heating (C1WC)=Not “Disabled”. 46 PMEN0638 rev.0 – 04/2023

Range
OFF / 1~5 0-10 -10-0

Steps
1 1 1

Units
ºC ºC

Notes
(1) (1) (*1)

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UNIT CONTROLLER

Circuit 2 REF

Access

Description

Rfacth1 Maxfacthp1 Maxfacthn1

Compen.Factor Heat Max Compen.Factor Heat + Max Compen.Factor Heat –

Default Value Circuit 2
2 10 -10

? NOTE
· (*1): If Water calculation mode for circuit 2 heating (C2WC)=Not “Disabled”. Room Temperature Demand OFF

Range
OFF / 1~5 0-10 -10-0

Steps
1 1 1

Units
ºC ºC

Notes
(1) (1) (*1)

· Circuit 1 (1) · Circuit 2 (2)

? NOTE
· (1): If Water calculation mode for circuit 1 in heating (C1WC) is not “Disabled”. · (2): If Water calculation mode for circuit 2 in heating (C2WC) is not “Disabled”.
Circuit 1

REF

Access

Description

RoffhC1

Room Demand OFF Heat

Default Value Circuit 1
3

Range OFF/1~5

? NOTE
(*1): If Water calculation mode for circuit 1 heating (C1WC)=Not “Disabled”. Circuit 2

REF

Access

Description

RoffhC2

Room Demand OFF Heat

Default Value Circuit 2
3

Range OFF/1~5

? NOTE
(*1): If Water calculation mode for circuit 2 heating (C2WC)=Not “Disabled”.
Central Operation
Available if Controller type (LCDM)= “Unit” or “Unit + Room”.

REF COT

Access

Description

Control Type

Default Value Central Operation
Local

Range Local / Full

47 PMEN0638 rev.0 – 04/2023

Steps 1

Units ºC

Notes (*1)

Steps 1

Units ºC

Notes (*1)

Steps –

Units –

Notes (*1)

UNIT CONTROLLER
? NOTE
(*1):This setting is only configurable in multi system control
8.5.2.2 Timer and Schedule

· Circuit 1 (1) · Circuit 2 (2) · DHW (3) · Swimming Pool (4) · Delete All Timer Configuration

? NOTE
· (1): If (Controller type (LCDM)= “Room” or “Unit + Room” and (Controlled circuits (LCDL)= “Room C1” or “Room C1+C2”) or (Controller type (LCDM)= “Unit” or “Unit + Room” and (Water calculation mode for circuit 1 heating (C1WC) or circuit 2 heating (C2WC) are not “Disabled”).
· (2): If (Controller type (LCDM)= “Room” or “Unit + Room” and (Controlled circuits (LCDL)= “Room C2” or “C1+C2”) are not “Disabled”. · (3): If Controller type (LCDM)= “Unit” or “Unit + Room” and Status (DHWs)= “Enabled”. · (4): If Controller type (LCDM)= “Unit” or “Unit + Room” and Status (SWP)= “Enabled”.
Circuit 1

REF
–

Access

Description

Heating (Air) Heating (Water)

Default Value Circuit 1
–

Range
–

Steps
–

Units
–

Notes
(1) (2)

? NOTE
· (1): If Controller type (LCDM)= “Room” or “Unit + Room” and Controlled circuits (LCDL)=”Room C1″ or “Room C1+C2”. · (2): If Controller type (LCDM)= “Unit” or “Unit + Room” and Water calculation mode for circuit 1 heating (C1WC) is not “Disabled”.
Circuit 2

REF
–

Access

Description

Heating (Air) Heating (Water)

Default Value Circuit 2
–

Range
–

Steps

Units

–

–

–

–

Notes
(1) (2)

? NOTE
· (1): If Controller type (LCDM)= “Unit” or “Unit + Room” and Controlled circuits (LCDL)=”Room C2″ or “C1+C2”. · (2):If Controller type (LCDM)= “Unit” or “Unit + Room” and Water calculation mode for circuit 2 heating (C2WC) is not “Disabled”.

48 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER

Timer and Schedule `any of the previous views’
Each of the following submenus share these parameters shown on the table · Circuit 1 Heating (Air) · Circuit 1 Heating (Water) · Circuit 2 Heating (Air) · Circuit 2 Heating (Water) · DHW · SWP

REF

Access

Description

–

Timer Type

–

Timer configuration (*)

–

Copy to Circuit 2 (*)

–

Copy to Circuit 1 (*)

–

Frequency (*)

–

Starting time

–

Mode

–

Setting Temperature

–

Stopping time

–

Configuration Parameters

–

Change Mode

–

Reset configuration

–

Comfort setting

–

ECO setting

Default Value Common
Disabled
Never Once Everyday Weekend Workday 06:00
Eco
(*) 12:00
24 21

Range
Disabled Simple Schedule
–

Steps
–

–

–

00:00 to Stopping ­ 00:10

ºC

Eco

Comfort

–

Setting Temperature

(*)

ºC

Starting +00:10 to 24:00

–

–

–

–

–

–

–

5~35

1

5~35

1

Units

Notes

–

(*1)

–

(*2)

–

(*3)

(*4)

00:10
–
1 00:10
ºC ºC

(4)
(4)
(5) (4) (6) (1) (1)(7)

? NOTE
· (1): If timer type= “Schedule”. · (2): If time type= “Schedule” and if the selected timer is “Circuit 1” (Air/Water) and if exist 2 circuits in the same controller and the timer mode is
the same between them. · (3): If time type= “Schedule” and if the selected timer is “Circuit 2” (Air/Water) and if exist 2 circuits in the same controller and the timer mode is
the same between them. · (4): If timer type= “Simple”. · (5): If timer type= “Simple” and Mode= “Setting”. · (6): If it is Air timer and (Timer type= “Simple” and mode= “Eco” or “Comfort”) or (Timer type= “Schedule” and “Timer mode” in the “Change mode”
submenu is set as “Mode”). · (*7) Only available for Water schedules when circuit OTC is Fix

49 PMEN0638 rev.0 – 04/2023

UNIT CONTROLLER
8.5.2.3 Water settings Only available when the system is configured as “Room Thermostat”.
· Space Heating (1) · DHW (2) · Swimming Pool (3)
? NOTE
· (1): If circuit 1 or circuit 2 are operating and Water calculation mode for circuit 1 heating (C1WC) or Water calculation mode for circuit 2 heating (C2WC)= “Fix” or “Gradient”.
· (2): If Status (DHWs)= “Enabled” and DHW is operating. · (3): If Status (SWP)= “Enabled” and the swimming pool is operating.
Space Heating
Available if Controller type (LCDM)= “Unit” or “Unit + Room”.
· Circuit 1 (1) · Circuit 2 (2)

? NOTE
· (1): If circuit 1 is operating and Water calculation mode for circuit 1 heating (C1WC)= “Fix” or “Gradient”. · (2): If circuit 2 is operating and Water calculation mode for circuit 2 heating (C2WC)= “Fix” or “Gradient”.
Circuit 1 and circuit 2

REF
roomC1FT roomC1Grad
roomC2FT roomC2Grad

Access

Description
Fixed T. (Circuit 1) Curve (Circuit 1) Fixed T. (Circuit 2) Curve (Circuit 2)

Default Value Circuit 1 and Circuit 2
–

Range
(C1Tmin) ~ (C1Tmax) 0.2~2.2
(C2Tmin) ~ (C2Tmax) 0.2~2.2

Steps
1 0.1 1 0.1

Units
ºC ºC –

Notes
(1) (2) (3) (4)

? NOTE
· (1): If Water calculation mode for circuit 1 heating (C1WC)= “Fix”. · (2): If Water calculation mode for circuit 1 heating (C1WC)= “Gradient”. · (3): If Water calculation mode for circuit 2 heating (C2WC)= “Fix”. · (4): If Water calculation mode for circuit 2 heating (C2WC)= “Gradient”.

50 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER

DHW and Swimming Pool

REF
roomDHW roomSWP

Access

Description

Default Value

DHW and Swimming Pool

Setting Temperature (DHW)

45

Setting Temperature (Swimming Pool)

24

Range
30 ~ (TDHWmax) 24~33

8.5.2.4 Space Heating If Controller type (LCDM)= “Unit” or “Unit+Room”.

Steps
1 1

Units
ºC ºC

Notes
–

· Circuit 1 · Circuit 2

Circuit 1 and Circuit 2

· Water Calculation Mode · Eco offset Water Set. · Working Limits · Mixing Valve

REF

Access

Description

Default Value

Circuit 1 and Circuit 2

C1WC

Water Calculation Mode (Circuit 1)

Fix

C1ECO

ECO offset water set (Circuit 1)

3

C2WC

Water Calculation Mode (Circuit 2)

Disabled

C2ECO

ECO offset water set (Circuit 2)

3

–

Working Limits (Circuit 1 and 2)

–

–

Mixing Valve (Circuit 2)

–

Range
Disabled Point
Gradient Fix
1~10
Disabled Point
Gradient Fix
1~10
–
–

Steps

Units

Notes

1

–

–

1

ºC

(*1)

1

–

–

1

ºC

(*2)

–

–

(*3)

–

–

(*2)

? NOTE
· (1): If Water calculation mode for circuit 1 heating (C1WC) is not set as “Disabled”. · (2): If Water calculation mode for circuit 2 heating (C2WC) is not set as “Disabled”. · (*3): If Water calculation mode for circuit 1 heating (C1WC) or circuit 2 heating (C2WC) are not set as “Disabled”.

51 PMEN0638 rev.0 – 04/2023

UNIT CONTROLLER
Water Calculation Mode The main parameter for configuration of space heating is the water calculation temperature. The water calculation mode establishes the temperature setting for each circuit, selecting a function to assign each temperature setting depending on the ambient temperature. Each circuit has its own Water Calculation type for heating. Both circuits may be configured as: · Disabled · Points · Gradient · Fix To switch between them the variable type must be edited.
? NOTE
Installer may ban the possibility of switching between water calculation modes. In that case the user is not be able to edit the water calculation variable type. None
The “None” option sets the circuit as disabled.
Points
Points is the most versatile calculation type. The user sets four points that creates a line representing the function that the Air to water heat pump will use to give the temperature setting according to the current ambient temperature.
Gradient It calculates the temperature setting using a gradient configured by the installer. In this view the user may configure the same variables as in the “Points” view, but automatically. User can only edit the gradient variable and it will automatically set the values for the other 4 variables on the chart.
? NOTE
The unique editable variable on that view is “Curve”.
52 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER Fix
This calculation mode sets the circuit’s temperature setting to a defined value, forcing the unit to maintain it.

Variables used in these views are displayed in the following table.

REF
C1TA1L C1TA1H C1TS1L C1TS1H C2TA2L C2TA2H C2TS2L C2TS2H

Access

Description

Default Value Points

Low ambient T (Circuit 1)

-20

High ambient T (Circuit 1)

20

Set point at low ambient T (Circuit 1)

A

Set point at high ambient T (Circuit 1)

B

Low ambient T (Circuit 2)

-20

High ambient T (Circuit 2)

20

Set point at low ambient T (Circuit 2)

A

Set point at high ambient T (Circuit 2)

B

Range
-20~6 7~25 (C1Tmin) ~ (C1Tmax) (C1Tmin) ~ (C1Tmax) -20~6 7~25 (C2Tmin) ~ (C2Tmax) (C2Tmin) ~ (C2Tmax)

Steps
1 1 1 1 1 1 1 1

Units
ºC ºC ºC ºC ºC ºC ºC ºC

Notes
(1) (1) (1) (1)

REF

Access

Description

C1OTC C2OTC

Gradient Curve (Circuit 1) Gradient Curve (Circuit 2)

Default Value Gradient
C 0.6

Range
0.2~2.2 0.2~2.2

Steps
0.1 0.1

Units
–

Notes (*1)

REF
C1TF C2TF

Access

Description

Fixed T (Circuit 1) Fixed T (Circuit 2)

Default Value Fix
D 40

Range
(C1Tmin) ~ (C1Tmax) (C2Tmin) ~ (C2Tmax)

Steps
1 1

Units
ºC ºC

Notes
(*1) –

REF

Access

Description

C1Tmax C1Tmin C2Tmax C2Tmin

Maximum Supply T(Circuit 1) Minimum Supply T(Circuit 1) Maximum Supply T(Circuit 2) Minimum Supply T(Circuit 2)

Default Value Working Limits
E 20 E 20

Range
35~F 20~34 35~F 20~34

Steps
1 1 1 1

Units
ºC ºC ºC ºC

Notes (1)
(1)

REF
C2PBMV C2IRFMV C2RTMV C2OTO

Access

Description

Default Value Mixing valve

Proportional Band (Circuit 2)

6.0

Integral Reset Fact. (Circuit 2)

2.5

Running Time Factor (Circuit 2)

140

Over-T Offset protection (Circuit 2)

5

Range
0~20 0.0~20 10~250 OFF, 3~10

Steps
0.2 0.1 10 1

Units
K % sec ºC

Notes
(*2)

53 PMEN0638 rev.0 – 04/2023

UNIT CONTROLLER

? NOTE
· (*1): Table:

CODE

RWLT

RWHT

A

44

70 (**)

B

20

20

C

0.6

1.4

D

45

70 (**)

E

45

80 (**)

F

45(*)

80 (**)

– (*) In case of Boiler combination complementary heating activation (Heating source (HES) = Boiler or Boiler + Heater) maximum supply temperature range can be setting up to 80ºC:

– (*): If R134a compressor disabled (DSW4#1: ON) setting must be 45ºC. · (2) OFF means “Disabled”.

8.5.2.5 DHW
Available if Controller type (LCDM)= “Unit” or “Unit + Room”.
· Status · Mode · Setting Temperature · HP Control · HP Control Setting · Maximum Setting T · Differential T · HP OFF Differential T · HP ON Differential T · Maximum Time · Anti Legionella

REF

Access

Description

DHWs DHWm TDHWS
DHWHPControl
DHWHPSetting TDHWmax THPOFF THPON
TDHWMAXTIME DHWLEG

Status Mode Setting Temperature
HP Control
HP Control Setting Maximum Setting T HP OFF Differential T HP ON Differential T Maximum Time Anti Legionella

Default Value DHW
Enabled Standard
45
Fix
B 55 5 10 45 –

Range
Disabled / Enabled Standard / High D. 30 ~ (TDHWmax)
T Fix C ~D 40~A 3~10 5~30 OFF 5~250
–

Steps
1 1 1 1 1 1 1 5 –

Units
ºC ºC ºC ºC ºC min –

Notes
(1)(5) (1)()
(1)
(2) (2)()
(3) (1) (6) (1)(*4)

? NOTE
· (1): If Status (DHWs)= “Enabled”. · (2): If HP Control= Fix. · (3): If Status (DHWs)= “Enabled” and DSW4-3: ON. · (4):The anti-legionella setting is set to “Disabled” by force in case that no boiler or electric heater is configured (DSW4-3).
54 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER

· (5): Setting hidden and considered as “Standard” when there is no DHW heater installed. · (6): If Status (DHWs)= “Enabled” and Mode (DHWm)= “Standard”. · (*) Refer to the table:

Code
A B C D

RWLT

3HP

5-10HP

RWHT

50 ºC (1)

55 ºC (1)

75 ºC (2)

45 ºC

80 ºC

TDHWS (Setting Temperature) + 5 ºC

45 ºC

80ºC (3)

– (1): 75ºC when DHW tank’s heater is enabled (DSW4-3: ON) or Combination mode (BOCM)= “Parallel” and DHW by boiler (BODHW) “Enabled” in “Boiler combination” option of the “Complementary heating” menu.
– (2): If the conditions of (1) are not satisfied and the R-134a compressor is disabled (DSW4-1: ON) the setting must be 40 ºC. – (3): If R134a compressor disabled (DSW4#1: ON) setting must be 45ºC.
Anti Legionella

· Status · Operation Day · Starting Time · Setting Temperature · Duration

REF

Access

Description

DesFun OpInt StTim
SHWTS KeepP

Status Operation Day Starting Time Setting Temperature Duration

Default Value Anti Legionella
Disabled Sunday 01:00 70 (*3)
10

Range

Steps

Disabled / Enabled Daily / Mon ~ Sun
(00:00~ 23:50) 40~A 10~60

00:10 –

Units
day time ºC min

Notes
(1) –
(2)(*) –

? NOTE
· (1): The anti-legionella setting is set to “Disabled” by force in case that no boiler or electric heater is configured (DSW4-3). · (2):If Status (DesFun)= “Enabled”.
· (3):The setting value must be 45 ºC if the R134a compressor is disabled (DSW4-1: ON). · () Refer to the table:

Code A

3HP 40 ºC (1)

RWLT

5-10HP 40 ºC (1)

RWHT 75 ºC (2)

– (1) 75 ºC when the heater of the DHW tank is enabled (DSW4-3: ON). – (2) The setting value must be 40 ºC if the conditions of (1) are not satisfied and the R134a compressor is disabled (DSW4-1: ON).

55 PMEN0638 rev.0 – 04/2023

UNIT CONTROLLER
8.5.2.6 Swimming Pool Available if Controller type (LCDM)= “Unit” or “Unit + Room”.
· Status · Setting Temperature · Offset Temperature

REF
SWP SWPs SWoff

Access

Description

Status Setting Temperature Offset Temperature

Default Value Swimming Pool
Disabled 24 15

Range

Steps

Disabled / Enabled

–

24~33

1

10~A

1

Units
ºC ºC

Notes
(1) (1)(*)

? NOTE
· (1): If Status (SWP)= “Enabled”. · () Refer to the table:

Code A

RWLT 21ºC (1)

RWHT 56 ºC (1)

– (1) If R134a compressor disabled (DSW4#1:ON) the setting must be 36ºC.
8.5.2.7 Complementary Heating Available if Controller type (LCDM)= “Unit” or “Unit + Room”.

· Heating Source · Electrical Heater (1) · Boiler Combination (2) · Solar Combination

? NOTE
· (1): Available if Heating source (HES)= “HP+Heater”. · (2): Available if Heating source (HES)= “HP+Boiler”.

56 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER

Heating Source

REF

Access

Description

Default Value Heating Source

HES

Heating source

HP Only

Range
HP Only HP + Heater HP + Boiler

Steps

Units

Notes

–

–

–

Electrical Heater

REF
HEBP HEksco HEPB HEIRF HEISWT HEWTEH

Access

Description

Bivalent Point Supply Setting Offset Proportional Band Reset Factor Inter Stage Time Waiting Time

Default Value Electrical Heater
0 4 6.0 2.5 5 30

Range
-20~20 0~10 0~20 0~20 1~10 5~90

Steps

Units

Notes

1

ºC

–

1

K

0.2

ºC/100%

0.1

%/ºCmin

1

min

5

min

Boiler Combination

REF
BOBP BOCM BOksco BOon BOoff BOWt BODHW BODWt

Access

Description
Bivalent Point Combination mode Supply Setting Offset Minimum ON Time Minimum OFF Time Waitting Time DHW by Boiler Wait Time for DHW

Default Value Boiler Combination
-5 Parallel
4 2 5 30 Disabled 45

? NOTE
(*1): If Status (DHWs)= “Enabled”. This parameter is not displayed in case of RWHT.
Solar Combination

Range

Steps

-20~20

1

Parallel / Serie

–

0~10

1

1~30

1

1~30

1

5~90

5

Disabled / Enabled

–

OFF, 5~120

5

REF

Access

SOLStSet

Status

Description

Default Value Solar combination

Disabled

Range
Disabled Input demand Total control

Steps –

Units ºC ºC min min min min
Units
–

Notes –
(1) (1)
Notes (*1)

? NOTE
(*1): Forced to disabled if Status (DHWs)= “Disabled”.

57 PMEN0638 rev.0 – 04/2023

UNIT CONTROLLER

Input demand

REF

Access

Description

SOLHy SOLmxt

DHW Hysteresis DHW Maximum Time

Default Value Input demand
10 60

Range
1-30 30~240

? NOTE
(*1): Available if Solar combination (SOLStSet) = “Input Demand” and Status (DHWs) = “Enabled”.

Total control

REF

Access

Description

SOLmxt TDHWTMAX
SOLSdTc SOLSdTc Solarmin SOLOver SOLAnz

DHW Maximum Time DHWT Max storage T T Connexion T Disconnection Panel Minimum T Panel Overheat T Panel antifreeze T

Default Value Total control
60 60 10 5 15 80 4

Range
30~240 30-90 1~30 1~30 1~60 80~120 -20~10

? NOTE
· (*1): 0 means OFF.
8.5.2.8 Heat Pump Available if Controller type (LCDM)= “Unit” or “Unit + Room”.

· Water Pump Configuration · Outdoor average Timer · Minimum ON Time · Minimum OFF Time · Emergency Operation · Seizure Protection

Steps
5 5

Units
min min

Notes
(1) (1)

Steps
5 1 1 1 1 1 1

Units
min ºC ºC ºC ºC ºC ºC

Notes
(*1)

REF

Access

Description

HPWP1 HPOUt
Rton Rtoff HPEO
–

Water Pump Configuration Outdoor average Timer Minimum ON Time Minimum OFF Time Emergency Operation Seizure Protection

Default Value Heat Pump
4 6 6 Manual –

Range
0~24 0~15 0~15 Manual/ Automatic
–

Steps
1 1 1 –

Units
hour min min
–

Notes
–

58 PMEN0638 rev.0 – 04/2023

ENGLISH

UNIT CONTROLLER

Water Pump Configuration

REF
WPOp WPSS WPDS WPWS WPMinf WPMino WPOvr WPSc

Access

Description

Default Value

Water Pump Configuration

Operation Mode

Fix

Space Speed

100

DHW Speed

100

SWP Speed

100

Minimum OFF Time

40

Minimum ON Time

10

Overrun Time

10

Stop conditions

Standard

Range

Steps

T/Fix

–

50~100

5

50~100

5

50~100

5

0~120

10

0~120

10

0~120

5

Standard/Thermo OFF

–

? NOTE
· (1):If Operation mode (WPOp) = “Fix”. · (2): If Status (DHWs) = “Enabled”. · (*3): If Status (SWP) = “Enabled”.
Seizure Protection

REF
HPWP1 HPOUt
Rton

Access

Description

Status Operation Day Starting Time

Default Value Seizure Protection
Disabled Monday
01:00

Range

Steps

Disabled / Enabled Mon ~ Sun
(00:00~ 23:50)

00:10

? NOTE
(*1):If Status (HPWP1)= “Enabled”.
8.5.2.9 Optional Functions Available if Controller type (LCDM)= “Unit” or “Unit + Room”.

Units % % %
min min min
–
Units –
day time

Notes –
(1) (2) (3)
–
Notes –
(1) (*1)

· System · Space functions · DHW (*1)

? NOTE
(*1) Available if Status (DHWs

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