Daikin RKOMBG22AAV1, RKOMBG28AAV1, RKOMBG33AAV1 Installation manuals

ROTEX
Condensing Boiler

GW-30 C22 / RKOMBG22AAV1
GW-30 C28 / RKOMBG28AAV1
GW-30 C33 / RKOMBG33AAV1

Installation instructions

Wall-mounted Gas

Condensing Boiler

CE - ATITIKTIES-DEKLARACIJA

<A> 177155_EMC2/03-2011

<B> KIWA (NB0063)

<C> -

CE - ATBILSTĪBAS-DEKLARĀCIJA

CE - VYHLÁSENIE-ZHODY

CE - UYGUNLUK-BEYANI

CE - IZJAVA O SKLADNOSTI

CE - VASTAVUSDEKLARATSIOON

CE - ДЕКЛАРАЦИЯ-ЗА-ϹЪОТВЕТСТВИЕ

CE - IZJAVA-O-USKLAĐENOSTI

CE - MEGFELELŐSÉGI-NYILATKOZAT

CE - DEKLARACJA-ZGODNOŚCI

CE - DECLARAŢIE-DE-CONFORMITATE

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

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относи тся настоящее заявление:
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declară pe proprie răspundere că echipamentele la care se referă această declaraţie:

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

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

o

x

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

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

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

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

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

w

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

16

Direktive z vsemi spremembami.20Direktiivid koos muudatustega.21Директиви, с техните изменения.22Direktyvose su papildymais.23Direktīvās un to papildinājumos.24Smernice, v platnom znení.25Deǧiştirilmiş halleriyle Yönetmelikler.

19

.

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<B>

göre

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pozitīvajam

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un atbilstoši

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kā norādīts

23 Piezīmes *

şi apreciat pozitiv

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aşa cum este stabilit în

sertifikātu <C>

vērtējumam saskaņā ar

.

Certificatul <C>

în conformitate cu

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de

a pozitívne zistené

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ako bolo uvedené v

v súlade s

24 Poznámka *

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in odobreno s strani

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certifikatom <C>

v skladu s

kot je določeno v

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’da belirtildiği gibi ve

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ja heaks

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nagu on näidatud dokumendis

tarafından olumlu olarak değerlendirildiği gibi.

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sertifikaadile <C>

järgi vastavalt

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kiidetud

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

10

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

19

инструкции:

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

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

Directives, as amended.02Direktiven, gemäß Änderung.03Directives, telles que modifiées.04Richtlijnen, zoals geamendeerd.05Directivas, según lo enmendado.06Direttive, come da modifica.07Οδηγιών, όπως έχουν τροποποιηθεί.08Directivas, conforme alteração em.09Директив со всеми поправками.

01

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

instrukcjami:

conformitate cu instrucţiunile noastre:

18

z późniejszymi poprawkami.18Directivelor, cu amendamentele respective.

17

и оценено положително

<A>

* както е изложено в

21 Забележка

igazolta a megfelelést,

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alapján, a(z)

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a(z)

Сертификата <C>

съгласно

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от

szerint.

<C> tanúsítvány

a(z)

ir kaip teigiamai nuspręsta

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kaip nustatyta

22 Pastaba *

, pozytywną opinią

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zgodnie z dokumentacją

.

Sertifikatą <C>

pagal

.

Świadectwem <C>

i

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к котором

оборудование,

CE - ERKLÆRING OM-SAMSVAR

CE - ILMOITUS-YHDENMUKAISUUDESTA

CE - PROHLÁŠENÍ-O-SHODĚ

заявляет, исключительно под свою ответственность, что

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

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

ilmoittaa yksinomaan omalla vastuullaan, että tämän ilmoituksen tarkoittamat laitteet:

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

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

j

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c

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y

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

h

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

u

q

n

s

09

10

11

12

CE - FÖRSÄKRAN-OM-ÖVERENSTÄMMELSE

CE - DECLARAÇÃO-DE-CONFORMIDADE

CE - ЗАЯВЛЕНИЕ-О-СООТВЕТСТВИИ

CE - OVERENSSTEMMELSESERKLÆRING

CE - DECLARACION-DE-CONFORMIDAD

CE - DICHIARAZIONE-DI-CONFORMITA

CE - ∆HΛΩΣΗ ΣΥΜΜΟΡΦΩΣΗΣ

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

acordo com as nossas instruções:09соответствуют следующим стандартам или другим нормативным документам, при условии их использования согласно нашим

08

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

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

förutsättning att användning sker i överensstämmelse med våra instruktioner:12respektive utstyr er i overensstemmelse med følgende standard(er) eller andre normgivende dokument(er), under forutssetning av at

disse brukes i henhold til våre instrukser:13vastaavat seuraavien standardien ja muiden ohjeellisten dokumenttien vaatimuksia edellyttäen, että niitä käytetään ohjeidemme

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

Low Voltage 2006/95/EC

Gas Appliances 2009/142/EC

Boiler Efficiency requirements 92/42/EEC

Electromagnetic Compatibility 2004/108/EC *

ob upoštevanju določb:20vastavalt nõuetele:21следвайки клаузите на:22laikantis nuostatų, pateikiamų:23ievērojot prasības, kas noteiktas:24održiavajúc ustanovenia:25bunun koşullarına uygun olarak:

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

10

16 Megjegyzés *

17 Uwaga *

enligt

<B>

og gjennom positiv

<A>

.

och godkänts av

<A>

enligt

Certifikatet <C>

som det fremkommer i

11 Information *

12 Merk *

.

και κρίνεται θετικά από

<A>

Certificato <C>

e giudicato positivamente

<A>

secondo il

<B>

da

delineato nel

όπως καθορίζεται στο

06 Nota *

07 Σημείωση *

<B>

positiv beurteilt

.

<B>

and judged positively by

Certificate <C>

<A>

aufgeführt und von

<A>

according to the

as set out in

wie in

.

Sertifikat <C>

ifølge

<B>

bedømmelse av

.

Πιστοποιητικό <C>

σύμφωνα με το

<B>

το

.

Zertifikat <C>

gemäß

18 Notă *

on

<B>

ja jotka

<A>

jotka on esitetty asiakirjassa

13 Huom *

e com o parecer

<A>

tal como estabelecido em

08 Nota *

et évalué positivement par

<A>

tel que défini dans

19 Opomba *

20 Märkus *

<B>

.

mukaisesti.

a pozitivně zjištěno

i pozitivno ocijenjeno

<A>

<A>

osvědčením <C>

Sertifikaatin <C>

jak bylo uvedeno v

kako je izloženo u

hyväksynyt

v souladu s

14 Poznámka *

15 Napomena *

.

согласно

Certificado <C>

<B>

.

и в соответствии

de acordo com o

<A>

<B>

positivo de

как указано в

Свидетельству <C>

сположительным решением

09 Примечание *

.

.

y es valorado

Certificat <C>

<A>

Certificaat <C>

en positief beoordeeld door

<A>

conformément au

overeenkomstig

<B>

zoals vermeld in

<B>

como se establece en

.

Certifikatu <C>

prema

<B>

od strane

<B>

og positivt vurderet af

<A>

som anført i

10 Bemærk *

de acuerdo con el

<B>

positivamente por

Georg Blümel

Managing Director

1st of April 2015

.

Certifikat <C>

i henhold til

.

Certificado <C>

CE - DECLARATION-OF-CONFORMITY

CE - KONFORMITÄTSERKLÄRUNG

CE - DECLARATION-DE-CONFORMITE

CE - CONFORMITEITSVERKLARING

ROTEX

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

a

01

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

d

02

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

f

03

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

l

04

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

e

05

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

i

06

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

g

07

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

p

08

RKOMBG22AAV1*, RKOMBG28AAV1*, RKOMBG33AAV1*, RKOMB22AAV1*, RKOMB28AAV1*, RKOMB33AAV1*,

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

instructions:02der/den folgenden Norm(en) oder einem anderen Normdokument oder -dokumenten entspricht/entsprechen, unter der Voraussetzung,

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

RHOB12AAV1*, RHOB18AAV1*, RHOB42AAV1*, RHOBG12AAV1*, RHOBG18AAV1*,

* = , , 1, 2, 3, ..., 9, A, B, C, ..., Z

01

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

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

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

με τις οδηγίες μας:

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

01

EN60335-2-102,

01 Note *

02 Hinweis *

03 Remarque *

04 Bemerk *

05 Nota *

2P369568-2B

TABLE OF CONTENTS

Safety instructions 4

1
2 Unit description 5

2.1 General ............................................................................................................................................................................................ 5

2.2 Functioning ...................................................................................................................................................................................... 5

2.3 Operating modes ............................................................................................................................................................................. 5

2.4 PC Interface .................................................................................................................................................................................... 7

2.5 Test programs ................................................................................................................................................................................. 7

3 Main components 8

3.1 Accessories ..................................................................................................................................................................................... 9

4 Installation 10

4.1 Installation measurements ............................................................................................................................................................ 10

4.2 Installation space ........................................................................................................................................................................... 12

4.3 Assembly ....................................................................................................................................................................................... 13

5 Connecting 15

5.1 Connecting CH installation ............................................................................................................................................................ 15

5.2 Connecting DHW installation ......................................................................................................................................................... 17

5.3 Connecting electronically .............................................................................................................................................................. 18

5.4 Connect room thermostat .............................................................................................................................................................. 19

5.5 Connecting gas ............................................................................................................................................................................. 20

5.6 Flue gas output and air input ......................................................................................................................................................... 21

5.7 Outlet systems ............................................................................................................................................................................... 22

6 Commissioning the unit and the Installation 35

6.1 Filling and air purge of unit and installation ................................................................................................................................... 35

6.2 Commissioning the unit ................................................................................................................................................................. 36

6.3 Switching off the unit ..................................................................................................................................................................... 37

7 Setting and adjustment 38

7.1 Direct via operating panel .............................................................................................................................................................. 38

7.2 Parameter settings via the service code ....................................................................................................................................... 39

7.3 Setting maximum CH power .......................................................................................................................................................... 41

7.4 Set pump capacity ......................................................................................................................................................................... 41

7.5 Weather dependent regulation ...................................................................................................................................................... 41

7.6 Conversion to different type of gas................................................................................................................................................ 42

7.7 Gas/air regulation .......................................................................................................................................................................... 42

7.8 Setting gas/air regulation ............................................................................................................................................................... 43

8 Malfunctions 45

8.1 Show last malfunction ................................................................................................................................................................... 45

8.2 Malfunction codes ......................................................................................................................................................................... 45

8.3 Other faults .................................................................................................................................................................................... 46

9 Maintenance 49
10 Technical specifications 51

10.1 Electrical diagram .......................................................................................................................................................................... 52

10.2 NTC resistances ............................................................................................................................................................................ 53

11 Warranty conditions 54

© 2015 ROTEX Heati ng Sys tems
All rights reserved.

The information provid ed applies to the product in its standard version. R O TEX Heati ng Systems GmbH can theref ore not be held liable for any damages arising from
any specifications of the product whi ch deviate from the stan dard version. The available inform ation has been compiled with the greatest possible care, but ROTEX
Heating Sys tems can not be held liable for any mist akes in the information, or for any consequences thereof. ROTEX Heating S ystems c annot be held li able for any
damage aris ing from work carried out by third parti es.

Subject to change.

Rotex Heating Systems GmbH 3

These installation instructions

Description

To be referred to as

High Efficiency

HR

Rotex RKOMBG22AAV1, RKOMBG28AAV1 and
RKOMBG33AAV1 wall-mounted gas boiler

Unit
Unit with piping for central heating

CH installation

System with pipes for domestic hot water

DHW installation

CAUTION

IMPORTANT

With these installation instructions, you can safely assemble, install and maintain the unit.
Carefully follow the instructions.

In case of any doubt, please contact the manufacturer.
Keep the installation instructions near the unit.

Abbreviations and terms used

Symbols

The following symbols are used in this manual:

Procedures which - if they are not carried out with the
necessary care - may cause damage to the product, the
surroundings, the environment or injury.

Procedures and/or instructions which, if they are not
followed, will have a negative effect on the functioning of
the unit.

Service and technical support for the installer

For information about specific settings, installation, maintenance and repair work, as
an installer, please contact your local Rotex dealer.

Identification of the product

You will find the unit details on the type plate on the bottom of the unit.
A. Unit type

B. Bar code with article number and serial number
C. Options

1 SAFETY INSTRUCTIONS

The manufacturer Rotex accepts no liability for damage or injury caused by the
failure to (strictly) observe the safety instructions, or negligence during the installation
of the Rotex RKOMBG*AAV1 wall-mounted gas boiler and any associated
accessories.

This device is not intended for use by people (including children) with reduced
physical, sensory or mental abilities, or lack of experience and knowledge, unless
they are given supervision or instructions on the use of the device by a person
who is responsible for their safety.

The instructions are stated separately for the various disciplines.
The entire installation must meet the applicable local technical and (safety)

instructions, for the gas installation, the electrical installation, smoke extraction
installation, drinking water installation, and central heating installation.

Rotex Heating Systems GmbH 4

2 UNIT DESCRIPTION

2.1 General

The Rotex RKOMBG*AAV1 wall-mounted gas boiler is a closed unit. The unit is
intended to provide heat to the water of a CH-installation and the domestic hot water
installation.

The air supply and the combustion gas outlet of the RKOMBG*AAV1 can be
connected to the unit by two separate pipes, or by a concentric connection. The unit
was tested in combination with the combi feedthrough, but the unit may also be
connected to combi feedthroughs which meet the universal test standards for combi
feedthroughs.

The unit can be connected to an assembly bracket if required, a frame with top
connection, and various installation sets. These are provided separately.

The Rotex RKOMBG*AAV1 wall-mounted gas boilers have the CE quality mark,
electrical protection class IP44.

It is possible to use the unit solely for warm water, or solely for heating. The system
which is not in use, does not need to be connected (see par. 7.2).

The unit is delivered for natural gas (G25) as a standard. On request, the unit can also
be provided for propane (G31).

2.2 Functioning

The Rotex RKOMBG*AAV1 wall-mounted gas boiler is a modulating high-efficiency
boiler. This means that the power is modulated to suit the required heat demand. In the
aluminum heat exchanger two separate copper circuits are integrated.

The separate circuits for CH and warm water allow the heating and warm water supply
to function independently. The hot water supply takes precedence over the heating.
Both cannot work at the same time.

The unit is fitted with an electronic boiler controller machine, which operates the fan
and the modulating pump at every heat requirement of the heating or the warm water
supply, opens the gas valve, ignites the boiler controller, and continuously monitors
and regulates the flame, depending on the requested power. The pump is only
operated during a heat request from the heating, depending on the requested power.

2.3 Operating modes

The operating mode of the unit is indicated by means of a code on the service display
of the operating panel.

- Off

The unit is not in operation, but is connected to the electricity supply. No response is
given to requests for domestic hot water or CH water. The unit frost protection is
active. This means that the pump will start running and the exchanger will be heated
up if the temperature of the water in the system drops too far.

If the frost protection intervenes, the code 7 will be displayed (heating up exchanger).
The pressure in the CH installation can also be read from the temperature display in

this operating mode (in bar).

Standby

The LED at the key is lit and possibly one of the LEDs of the tap comfort function.
The unit is ready to respond to a request for CH or tap water.

0 Post-running CH

After the end of the CH-operation, the pump will post-run. The post-pumping time is set
to the value in par. 7.2 in its factory settings. This setting can be changed. In addition
to this, the pump will run automatically 1 time per 24 hours, for 10 seconds, in order to
prevent it from getting stuck. This automatic switching on of the pump takes place at
the time of the last heating request. In order to change this, the room thermostat needs
to be set higher for a moment, at the required time of day.

1 Requested temperature reached

The boiler controller may temporarily block the heat request. The boiler controller will
then be stopped. The block occurs because the required temperature has been
reached. When the temperature has sufficiently decreased, the block will be lifted.

Rotex Heating Systems GmbH 5

2 Selftest

Once every 24 hours, the boiler controller tests the connected sensors. During the
test, the controller will not carry out any other tasks.

3 Ventilating

When the unit is started, the fan is first brought up to its correct start rpm. When the
start rpm is reached, the boiler controller will be ignited. Code

there is post-fanning after the boiler controller is stopped.

3 is also visible when

4 Igniting

When the fan has reached the start rpm, the boiler controller will be ignited by means
of electrical sparks. During the ignition, code

does not ignite, a new attempt will be made after approximately 15 seconds. If after 4
ignition attempts, the boiler controller has still not been ignited, the controller will go
into down-time.

4 is displayed. If the boiler controller

5 CH-operation

An on/off thermostat, an OpenTherm thermostat, an outdoor sensor or a combination
thereof can be connected to the controller (see par. 10.1)

When there is a heat request from a thermostat, after the fan has started running
(code

3 ), the ignition will take place (code 4 ) followed by the CH operating mode

(code 5 ).
During CH operation, the rpm of the fan and therefore the power of the unit can be

adjusted so the temperature of the CH water to the required CH supply temperature
can be controlled. If an on/off thermostat has been connected, this will be the CH
supply temperature set on the display. In case of an OpenTherm or wireless
thermostat, the required CH supply temperature is determined by the thermostat. In
case of an outdoor sensor, the required CH supply temperature is determined by the
fuel line programmed in the boiler controller. For the last two situations, the
temperature set on the display is the maximum.

During CH operation, the requested CH supply temperature will be displayed on the
operating panel.

The CH supply temperature can be set between 30 and 90°C (see par. 7.1). Caution:
for a low temperature system, a lower maximum setting may be required than the
standard setting of 80°C.

You can press the service button during CH operation to read the actual CH supply
temperature.

If the tap comfort function is switched on (see code 7 ), an OpenTherm heating
request of less than 40 degrees will be generated.

6 Domestic hot water operation

The hot water supply takes precedence over the heating. If the flow switch senses a
request for more than 2 l/min of domestic hot water, any CH requests will be

interrupted. After the fan has switched on (code
(code 4 ), the controllerwill switch to domestic water operation (code 6 ). During

domestic hot water operation, the rpm of the fan, and therefore the power of the unit,
is controlled by the controller on the basis of the set tap water temperature.

The control system ensures the tap water temperature is correct. The water
temperature can be set between 40°C and 65°C (see par. 7.1).

The set tap water temperature is displayed on the operation panel. The standard
setting is 60°C.

You can press the service button during tap water operation to read the actual tap
water temperature.

3 ) and there has been an ignition

7 Heating up unit

In order to provide a fast supply of domestic hot water, a so-called tap comfort
function has been installed in the unit. This function keeps the heat exchanger at the
right temperature (it can be set, see par. 7.2). The tap comfort function has the
following settings:

• On: ( LED on) The tap comfort function of the unit is continuously switched on.

The unit always immediately provides warm water.

• Eco: ( LED on) The tap comfort function of the unit is self-learning. The unit will

adjust to the usage pattern of the domestic hot water. This means the heat
exchanger will not be kept warm during the night or during longer absences.

• Off: (Both LEDs off) The heat exchanger is not kept warm which means the

supply of domestic hot water takes a bit of time. If there is no need for fast delivery
of domestic hot water, the tap comfort function can be switched off.

Rotex Heating Systems GmbH 6

In the settings "on" and "eco" , the unit meets the requirements of the Gaskeur

Description of program

Button combination

Display reading

Burner on with minimum DHW
capacity (see parameter d par. 7.2)

Burner on with set maximum CH
power (see parameter 3 par. 7.2)

Burner on with maximum DHW power
(see parameter 3 par. 7.2)

Current operation

situation

•

The unit is fitted with frost protection in order to prevent it from

exchanger is sufficiently high. If the frost protection intervenes, code

•

frost thermostat on the return pipe.

(see par. 10.1).

[Gas Inspection] CW standards.

2.4 PC Interface

The boiler controller is provided with an interface for a PC. A PC can communicate with
the CH boiler by means of a special dongle, and the associated software. This facility
enables you to follow the behavior of the controller, the unit and the heat installation
over a long period.

2.5 Test programs

There is an option in the boiler controller, to bring the unit into a test status.
Activating a test program, will switch on the unit with a set fan rotations per minute,

without the control functions intervening.
The safety functions do remain active.

The test program is ended by pressing and simultaneously.

Test programs

and "L"

and (1x) "h"

and (2x) "H"

Switching off test program and

During test mode the following data can be read :

• By pressing the + button continuously in the display the CH water pressure is shown.

• By pressing the - button continuously in the display the ionisation current is shown.

2.5.1 Frost protection

freezing. If the temperature of the heat exchanger drops too low,
the pump will start running until the temperature of the heat

7 will be displayed (heating up exchanger).

If the installation (or a part thereof) can freeze, the coldest place

should be fitted with an (external)
This must be connected in accordance with the electrical diagram

Note
When the unit is switched off ( - on the service display), the unit frost protection will

remain active, however a heat request from an (external) frost thermostat will be ignored.

Rotex Heating Systems GmbH 7

3 MAIN COMPONENTS

A.

CH pump

L.

Air supply (only when using twin pipe flue system)

B.

Gas valve

M.

Flue gas/air inlet concentric adapter

C.

Burner controller (incl. operating panel)

N.

Connection block / terminal strip X4

D.

Sensor S1 (flow)

O.

Condensate drain pan

E.

Sensor S2 (return)

P.

Domestic hot water sensor S3

F.

Fan

Q.

Siphon

G.

Flow sensor

R.

Heat exchanger

H.

Pressure sensor central heating

S.

Operating panel and display

I.

Connection wire 230 V ~ with earthed plug

T.

Ionization / ignition pen

J.

Manual air bleed

U.

Position of data plate

K.

Sight glass

Rotex Heating Systems GmbH 8

3.1 Accessories

Description

Article numbers

B-pack EKFJS*AA

EKFJS*AA

B-pack middle

EKFJM*AA

B-pack large

EKFJL*AA
Valve kit

EKVK4AA

Cover plate RKOMBG*AAV1

EKCP1AA

Outdoor sensor

EKOSK1AA

3-way valve set

EK3WV1AA

Flue gas adapter Concentric Ø80x125

EKHY090717
Flue gas adapter Parallel 80 mm

EKHY090707
Propane set *KOMBG22AAV1

EKPS075877

Propane set *KOMBG28AAV1

EKPS075867

Propane set *KOMBG33AAV1

EKHY075787

Rotex Heating Systems GmbH 9

4 INSTALLATION

A =

Supply CH

G ¾” (ext)

B =

Return CH

G ¾” (ext)

C =

Gas

G ½” (int)

D =

Tap water cold

R ½”

E =

Tap water warm

R ½”

F =

Condense outlet

Ø dn25 (flexible)

h=

517mm

RKOMBG22AAV1

577mm

RKOMBG28AAV1

637mm

RKOMBG33AAV1

H=

590mm

RKOMBG22AAV1

650mm

RKOMBG28AAV1

710mm

RKOMBG33AAV1

Z =

Flue gas outlet/air inlet

Ø60/100 (concentric)

4.1 Installation measurements

Unit with pipes connected downwards:

Unit + wall mounting strip

Rotex Heating Systems GmbH 10

A =

Supply CH

G ¾” (ext)

B =

Return CH

G ¾” (ext)

C =

Gas

G ½” (int)

D =

Tap water cold

R ½”

E =

Tap water warm

R ½”

F =

Condense outlet

Ø dn25 (flexible)

H=

770mm

RKOMBG22AAV1

830mm

RKOMBG28AAV1

890mm

RKOMBG33AAV1

Z =

Flue gas outlet/air inlet

Ø60/100 (concentric)

Unit connected to B-pack:

Unit + B-pack

Rotex Heating Systems GmbH 11

4.2 Installation space

IMPORTANT

The unit must not be installed in a space where work is carried out
with aggressive or corrosive gases such as hairspray.

The unit must be installed against a wall with sufficient load bearing capacity.
In case of light wall constructions, there is a risk of resonance noises.
Within 1 meter of the unit, there must be a earthed wall plug.
In order to prevent the condense outlet from freezing, the unit must be installed in a

frost-free room. Preferably ensure there is a space of at least 2 cm next to the boiler.
No free space is required due to danger of singeing.

4.2.1 Installing in kitchen cabinet

The unit can be placed between two kitchen cabinets, or inside a kitchen cabinet.
Make sure there is sufficient ventilation at the bottom and the top.

If the unit is installed inside a cabinet, ventilation openings of at least 50 cm
required.

4.2.2 Removing cover plate and front panel

For various activities on the unit, the cover plate and front panel have to be removed
from the unit, if they were installed. Do this as follows:

• If you are using the cover plate (A), remove it to the front.

• Unscrew both screws (1) behind the display window.

• Pull the bottom of the front panel (2) forwards.

2

are

Rotex Heating Systems GmbH 12

4.3 Assembly

The boiler can be hung to the wall using :

• the wall suspension strip and a the connection kit EKVK4AA.

• a B-pack including an expension vessel and a connection kit.

4.3.1 Assembling suspension strip and assembly bracket

• Make sure the construction of the wall is suitable for hanging the boiler.

• Drill the holes for the suspension strip and the connection kit in the wall

using the template delivered with the boiler.

• Mount the suspension strip and the assembly bracket horizontally on the
wall, using the associated attachment materials.

• Place the filling loop on the connections of the return and cold water nipple
following the connection kit installation instruction

• The boiler can now be placed on the suspension strip simultaniously sliding
the pipes of the boiler into the valves in the assembly bracket.

4.3.2 Assembling B-pack

• Make sure the construction of the wall is suitable for hanging the boiler and
B-pack.

• Drill the holes for the B-pack kit in the wall using the template delivered
with the boiler.

• Mount the B-pack on the wall using the associated attachment materials.

• Place the assembly bracket in the frame as described in the manual

inclued in the B-pack.

• Connect the flexible hose on the expension vessel and the conenction on
the return valve. Make sure the seal rings are placed !

• Place the filling loop on the connections of the return and cold water nipple
following the connection kit installation instruction.

• The boiler can now be placed on B-pack simultaniously sliding the pipes of
the boiler into the valves in the assembly bracket.

Rotex Heating Systems GmbH 13

4.3.3 Assembling the unit

1. Unpack the unit.

2. Check the content of the packaging, which consists of:

• Unit (A)

• Suspension strip (B)

• Siphon + flexible hose (C)

• Flexible tube (D)

• Installation instructions

• Operating instructions

• Warranty card

3. Check the unit for any damage: immediately report damages to the supplier.

4. Install the suspension strip.

5. Check whether the compression rings are positioned straight in the couplings
of the assembly bracket.

6. Position the unit: slide it from top to bottom over the suspension strip (B).
Make sure the pipes slide into the compression fittings simultaneously.

7. Tighten the compression fittings onto the assembly bracket.
The nipples and pipes must not rotate with it!

8. Open the display valve and loosen the two screws on the left and right of the
display, and remove the front panel.

9. Assemble the flexible tube (D) onto the outlet of the siphon.

10. Fill the siphon with water, and slide it as far as possible on top of the
condense output connector (E) under the unit.

11. Seal flexible tube (D) of the siphon, if possible together with the overflow pipe
of the inlet combination and the overflow valve, to the sewage via open
connection (F).

12. Assemble the air supply and the burning gas outlet (see par. 5.6).

13. Assemble the cover and tighten the two screws to the left and the right of the
display, and close the display cover.

4.3.4 Apply cover plate (optional)

Suspend the converted top edge of the cover plate from the washers underneath
the bottom of the unit, and slide the cover plate as far back as possible.

Danger: risk of burning
In case of high leaving water set ponts for space heating (eighter a high fixed set

point or a high weather-dependent set point at low ambient temperatures), the heat
exchanger of the boiler can be very hot, for example 70°C.

Beware that in case of a tapping demand, the water can initially have a higher water
temperature than requested.

In this case, it is recommended to install a thermostatic valve to prevent scalding.
This can be done according to the schematics below.

a=boiler, b=DHW from boiler, c= cold water inlet,

d=shower, e=thermostatic valve (field supply)

Rotex Heating Systems GmbH 14

5 CONNECTING

5.1 Connecting CH installation

1. Rinse the CH installation carefully.

2. Fit the supply pipe (A) and return pipe (B) to the connection set.

3. All pipes must be assembled with no electrical current, in order to prevent shocks
from the pipes.

4. Existing connections may not be rotated, in order to prevent leakages.

The CH installation must be fitted with:

• A filling/draining tap (A) in the return pipe, immediately underneath the unit.

• A draining tap at the lowest point of the installation.

• An overflow valve (B) of 3 bar in the input pipe at a distance of no more than 500

mm from the unit.
Between the unit and the overflow valve there may be no valve or constriction.

• An expansion vessel in the return pipe (in the B-pack or in the installation).

• A check valve, if there are pipes running up, within close distance of the unit. This

prevents a thermosiphon effect from occurring during tap water operation (a non
spring-operated return valve, must be assembled vertically).

5.1.1 Thermostatic radiator taps

If all radiators are fitted with thermostatic or cable radiator taps, a minimum water
circulation must be safeguarded. See par. 7.3.

5.1.2 Underfloor heating

Underfloor heating with pump

If an underfloor heating system is not hydraulically neutral, the underfloor heating
pump may generate unwanted circulation over the CH boiler. For a good functioning of
the domestic hot water provision, unwanted circulation over the CH boiler must be
prevented.

Connect an underfloor heating system indirectly hydraulically neutrally or provide the
CH installation with a two-way valve set 230 V ~ (E). If the underfloor heating pump
absorbs heat via the return of the boiler, unwanted circulation can be prevented by
means of a check valve (D).

Make sure there is a minimal water circulation. See par. 7.3.

Connection diagram underfl oor he ating

A. CH boiler
B. CH pump
C. Thermostatic control valve
D. Spring-operated check valve
E. Electrical valve 230 V ~
F. Radiators
G. Space/clock thermostat
H. Maximum thermostat

Rotex Heating Systems GmbH 15

Underfloor heating without pump

Connect the underfloor heating system (D) and set the maximum CH supply
temperature of the CH boiler to the design condition. Fit a clamp thermostat (A) onto
the supply tube underneath the CH boiler. The clamp thermostat with blind cap must
be set to a maximum supply temperature of 55°C.

Fit the on/off room thermostat (B) and connect in a series with the clamp thermostat.
The boiler must be connected to X4 - 6/7.

In this situation, the pump in the boiler is used to bridge the loss of pressure of the
underfloor heating system. Using the loss of pressure graph par. 7.4, the maximum
loss of pressure of the underfloor heating system can be determined.

Make sure there is a minimal water circulation. See par. 7.3.
In case of an underfloor heating system without pump, we recommend changing the

following parameter settings:
par. o from 0 to 3.
par. P from 5 to 2.
Parameter 3 must also be set to its minimum level, or the
Transmission loss of the property, see par. 7.3.

5.1.3 Dividing CH installation in groups in case of additional heat sources

Operating principle

If the room thermostat switches off the boiler because another heat source, the other
rooms may cool down.
This can be resolved by splitting the CH installation into two groups. The group with
the external heat source (Z2) can be shut off from the main circuit by means of an
electrical shut-off valve. Both groups are fitted with their own room thermostat.

Please note: This "external heat source" regulation may only be applied if no extra
external boiler has to be heated up (installation type 1).

Installation instructions

1. Install the valve in accordance with the connection diagram.

2. Connect the room thermostat of group 1 to op X4 – 6/7.

3. Connect the room thermostat of group 2 to op X4 – 11/12.

4. Change parameter A (see Parameter settings via the service code par. 7.2).

Please note: The room thermostat in group
thermostat in group 2 may be an OpenTherm thermostat or an on/off thermostat.

Connection diagram "external heat source" regulation
A. CH boiler
B. Electrical shut-off valve 230 V ~
C. Radiators
T1. Room thermostat group 1
T2. Room thermostat group 2
Z1. Group 1
Z2. Group 2

1 MUST be an on/off thermostat. The room

Rotex Heating Systems GmbH 16

5.2 Connecting DHW installation

1. Rinse the installation carefully.

2. If required, assemble an inlet combination.

3. Assemble the cold (D) and warm water pipe (C) to the connection set.

Comments

• If the unit is only used for warm water supply, the heating function can be

switched off using the service code on the operating panel. The CH installation
does not need to be connected or filled.

• If the unit is switched off during winter, and is disconnected from the electricity

supply, the sanitary water must be drained in order to prevent freezing. To do so,
disconnect the tap water connections straight underneath the unit.

In case of old installations or domestic hot water circuits which can contain small
particles, install a filter in the domestic hot water circuit.
This pollution could cause a fault during domestic hot water operation.

Resistance graph tap circuit unit

A. RKOMBG22AAV1
B. RKOMBG28AAV1
C. RKOMBG33AAV1
X. Water pipe pressure (Bar)
Y. Flow rate (L/min, tolerance ± 10%)

Rotex Heating Systems GmbH 17

CAUTION
A socket with safety

from the unit.
The socket must be easily accessible.
When installing the unit in a damp space, a fixed connection is

obligatory, by means of an all
minimum contact gap of 3 mm.

If the mains cab
other reason, the replacement mains cable must be ordered
from the manufacturer or its representative. In case of any
doubt, contact the manufacturer or its representative.

Temperature regulation

Connector X4

Comments

Room thermostat on/off

6 - 7

-

Modulating thermostat with
comfort function in use

11 - 12

Outdoor temperature
sensor

8 - 9

­Frost thermostat

6 - 7

Parallel over room thermostat

5.3 Connecting electronically

ground must be no further than 1 meter

1. Remove the plug from the socket, when working on the electrical circuit.

2. If there is a cover plate (A), remove it to the front.

3. Unscrew both screws (1) behind the display window.

4. Slide the bottom of the front panel (2) forwards, and remove it.

5. Pull the boiler controller forward. The boiler controller unit will tip downwards in the

process.

6. Consult par. 10.1 to make the connections.

7. After the required connections have been made, slide the boiler controller back into

the unit and return the cover plate, if you are using one.

8. After making the required connections, connect the unit to the socket with safety

ground.

-pole main switch with a

le is damaged or requires replacement for any

5.3.1 Electrical connections

Rotex Heating Systems GmbH 18

5.4 Connect room thermostat

5.4.1 Room thermostat on/off

1. Connect the room thermostat (see par. 10.1).

2. If necessary, set the feedback resistance of the room thermostat to 0.1 A. If unsure,
measure the electrical current and set it accordingly.
The maximum resistance of the thermostat pipe and the room thermostat amounts to a
total of 15 Ohm.

5.4.2 Modulating room thermostat, Open Therm

The unit is suitable for connecting a modulating room thermostat, in accordance with
the OpenTherm communication protocol.

The most important function of the modulating room thermostat is to calculate the input
temperature at a required room temperature, in order to make optimal use of the
modulating. At every heating request, the required input temperature is shown on the
display of the unit.

Connect the modulating thermostat (see par. 10.1).
If you want to use the tap water on/off switch function of the OpenTherm thermostat, the

tap water comfort function must be set to eco or on.
For more information, consult the manual of the room thermostat.

5.4.3 Modulating room thermostat, wireless

The RKOMBG*AAV1 CH boiler is suitable to communicate wirelessly without
sending/receiving module with the Honeywell room thermostats T87RF1003 Round RF,
DTS92 and CMS927. The CH boiler and the room thermostat must be appointed to each
other:

• Press the reset button of the unit for approximately 5 seconds to access the RF room

thermostat menu.

• One of the following codes will be shown on the display of the unit:

1. rF and

2. rF and L / 1 : the display above button shows an L alternated by a 1

red led : off

• Press the reset button to leave the RF room thermostat menu or wait for 1 minute.

Testing the connection between the unit and the RF room thermostat

1. Press the reset button of the unit for approximately 5 seconds to access

2. Press the service button 1x. On the display above the button, a

3. Set the room thermostat to the test mode (see the installation and operating

4. The red led above the reset button will flash if the appointment has

5. Press the reset button of the unit to leave the RF room thermostat menu

Undo the appointment of an RF room thermostat to the CH boiler.

• Press the reset button of the unit for approximately 5 seconds to access

• Press the service button 2x. On the display above the button, a

L / - : the display above the button shows an L alternated by a –

red led : flashing

The CH boiler has not been appointed. A unit in this operating status, can be linked
by using the method of the appropriate room thermostat.
The method of appointment depends on the type of room thermostat and is
described in the installation and operating instructions of the wireless room
thermostat.

The CH boiler has already been appointed. There is already an existing link with
an RF room thermostat. In order to allow a new link to be made, the existing link
will have to be removed.
See: Undo the appointment of an RF room thermostat to the CH boiler.

the RF room thermostat menu of the boiler controller.

t

will be shown.
instructions of the room thermostat).
been carried out correctly.
of the boiler controller. You will automatically exit the test mode 1 minute

after the last test message of the RF room thermostat has been received.

the RF room thermostat menu of the CH boiler.

C

will be shown.

Rotex Heating Systems GmbH 19

• Press the reset button of the unit again to remove the existing
appointments. The display of the unit will show rF again, with a flashing

L / - . If required, an RF room thermostat can be appointed to the unit

again.

• Press the reset button of the unit to leave the RF room thermostat
menu or wait for 1 minute.

5.4.4 Outdoor temperature sensor

The unit is provided with a connection for an outdoor temperature sensor. The
outdoor temperature sensor should be used in combination with an on/off room
thermostat.

In principle, any on/off room thermostat can be combined with an outdoor sensor.
Upon request of the room thermostat, the boiler will provide heat until the maximum
set temperature in the boiler has been reached. This maximum set temperature is
automatically regulated via the outdoor sensor, in accordance with the set fuel line in
the boiler.

Connect the room outdoor sensor (see par. 10.1).
For the fuel line setting, see the weather dependent regulation (see par. 7.5).

5.5 Connecting gas

1. Fit the gas valve directly on the 1/2" gas connection of the connection set using
appropriate seal

2. .Place a gas sieve in the connection for the unit if the gas may be
contaminated.

3. Connect the gas pipe in the gas valve using appropriate seal..

4. Check the gas carrying parts for leakages at a pressure of up to 50 mbar.

5. The gas pipe should be fitted pressure free.

Rotex Heating Systems GmbH 20

5.6 Flue gas output and air input

For the installation of the flue gas output and air input material, we
refer to the enclosed basic manual, or contact the manufacturer of
the appropriate flue gas output and air input equipment for
extensive technical inf

Make sure that the spigot and socket joint of the flue gas

Check all parts which transport flue gas or air for air tightness.

Unit
category

Materials

Supplier/Test standard

C13
Feedthrough

Rotex

Other parts

Gastec QA or Rotex

C33

Feedthrough

Rotex

Feedthrough at the Prefab chimney

Gastec QA, Rotex or third
parties

Other parts

In accordance to applicable
national or local legislation

C43
All materials

Gastec QA or Rotex

At the CLV system

Gastec QA

C53
Inlet roster

Rotex

Other parts and exhaust hood

Gastec QA or Rotex

C63

All materials and feedthrough

Gastec QA

Main channel

Gastec QA

Other parts

Gastec QA

C83

Inlet roster

Rotex

C93

All materials

Gastec QA or Rotex

output and air input materials seal effectively and will not
come loose. Not properly attaching the flue gas output and the
air input can lead to dangerous situations or physical injury.

5.6.1 Concentric connection 60/100

The boiler is fitted with a flue gas adapter suitable for connecting to a concentric flue gas
extractor system with a diameter of 60/100.

Fit the concentric pipe for the air supply and burning gas extraction in the adapter. The
built in gaskets ensure there is an air tight seal.

5.6.2 Concentric connection 80/125

If required, the flue gas adapter 60/100 can be replaced by a version for a flue gas extractor
system with a 80/125 diameter.

1. Carefully follow the instruction as provided with the adapter set 80/125.

2. Fit the concentric pipe for the air supply and burning gas extraction in the adapter. The
built in gaskets ensure there is an air tight seal.

ormation and specific assembly instructions.

5.6.3 Parallel connection 80/80

If required, the flue gas adapter 60/100 can be replaced by a version for a parallel flue gas
extraction system (2 pipes) with a 80 mm diameter.

1. Carefully follow the instruction as provided with the adapter set 80.

2. Fit the pipes for the air supply and burn gas extraction in the input and output of the
unit. The built in gaskets ensure there is an air tight seal.

5.6.4 Materials to be used:

Rotex Heating Systems GmbH 21

5.7 Outlet systems

C13

C33

RKOMBG22AAV1

10 m

11 m

RKOMBG28AAV1

10 m

10 m

RKOMBG33AAV1

10 m

10 m

C13

C33

C93

RKOMBG22AAV1

29 m

29 m

See par. 5.7.13

RKOMBG28AAV1

29 m

29 m

See par. 5.7.13

RKOMBG33AAV1

29 m

29 m

See par. 5.7.13

Bend 90°

R/D=1

2 m

Bend 45°

R/D=1

1 m

Knee 90°

R/D=0.5

4 m

Knee 45°

R/D=0.5

2 m

C13

C13

C33

C33

C33

Please note that not all flue gas configurations described below are permitted in all
countries. Therefore observe local regulations prior to installation.

5.7.1 Pipe lengths

As the resistance of the flue tube and air supply pipes increases, the power of the unit
will decrease. The maximum permitted power reduction is 5%.

The resistance of the air supply and the combustible gas outlet depends on the length,
diameter and all components of the pipe system. Per unit category, the total permitted
pipe length has been indicated for the air supply and the combustible gas outlet.

5.7.2 Permitted pipe lengths in concentric flue tube systems

Permitted pipe lengths when applying concentric 60/100

Permitted pipe lengths when applying concentric 80/125

Replacement lengths

General assembly:

For all outlets, the following assembly applies:

1. Slide the concentric combustion gas outlet pipe and air supply pipe.

2. Slide the concentric pipes into each other.
From the unit, every pipe has to be slid into the previous one.

3. Mount a non-vertical combustion gas outlet pipe on a slope towards the unit
(min. 5mm/m).

4. Fit the assembly brackets in accordance with the assembly instructions of the
supplier of the air supply/flue tube system.

Rotex Heating Systems GmbH 22

5.7.3 Permitted pipe lengths at parallel air supply and flue tube

C13

C33 (*)

C43

C53

C83

RKOMBG22AAV1

100 m

100 m

100 m

100 m

100 m

RKOMBG28AAV1

85 m

85 m

85 m

85 m

85 m

RKOMBG33AAV1

80 m

80 m

80 m

80 m

80 m

Bend 90°

R/D=1

2 m

Bend 45°

R/D=1

1 m

Knee 90°

R/D=0.5

4 m

Knee 45°

R/D=0.5

2 m

Pipe

Pipe lengths

Pipe length total

Flue gas outlet

L1 + L2 + L3 + 2x2 m

13 m

Air supply

L4 + L5 + L6 + 2x2m

12 m

Supplier per country

CZ

FR

DE

IT

BE

SP

UK

PL

C13

all materials

Rotex

C33

all materials

Rotex

C53

all materials

Rotex

C43

all materials

Rotex

C63

all materials

(2)

(1)

(1)

(1)

(2)

(1)

(1)

(2)

C83

all materials

Rotex

C93

all materials

Rotex

systems

Permitted pipe lengths when applying Ø80 mm.

(*) Under certain conditions, a greater total length is possible.
Also see par. 5.7.9

In case of greater or smaller pipe diameters, the permissible pipe length is greater or
smaller respectively. In case of smaller diameters, the following applies:

Ø70: 0.59x the permitted pipe length for Ø80
Ø60: 0.32x the permitted pipe length for Ø80
Ø50: 0.15x the permitted pipe length for Ø80
Contact the manufacturer for test calculations for the resistance of the air supply and

combustible gas outlet pipe and the wall temperature at the end of the combustible gas
outlet pipe.

Replacement lengths

Calculation example

Note:

The total pipe length is: sum of the straight pipe lengths + sum of the replacement pipe
lengths of bends/knees amounts to a total of 25 meters. If this value is less than the
maximum permitted pipe length, the flue gas outlet meets the requirements on this point.

5.7.4 Passage, materials and insulation

(1) Gas exhaust/air intake parts can be bought from a 3rd party.

All parts purchased from an external supplier MUST comply with EN14471.

(2) NOT allowed.

Rotex Heating Systems GmbH 23

5.7.5 General assembly:

CAUTION
Pipes for the connection of the air supply and the combustion

gas outlet between the unit and the double pipe feedthrough
must have a diameter of Ø 80 mm.

RKOMBG22AAV1

100 m

RKOMBG28AAV1

85 m

RKOMBG33AAV1

80 m

For all outlets, the following assembly applies:

1. Slide the combustible gas outlet pipe into the air outlet of the unit.

2. Slide the combustible gas outlet pipes into each other.
From the unit, every pipe has to be slid into the previous one.

3. Mount a non-vertical combustible gas outlet pipe on a slope towards the unit
(min. 5mm/m).

For all air supply pipes, the following assembly applies:

1. Slide the air supply pipe into the input of the unit.

2. Mount a non-vertical air supply pipe on a slope outward (min. 5mm/m).

3. Place one or more assembly brackets at no more than 1 meter apart.

4. Place an assembly bracket on both sides of each bend.

5. If necessary, apply insulation.
Fit the assembly brackets to the flue gas outlet tube and air supply tube in
accordance with the assembly instructions of the supplier of the air supply/flue tube
system.

5.7.6 Horizontal facade outlet double pipe feedthrough

Unit category: C13

• Horizontal double pipe feedthrough
Extendable, for a balcony gallery output, by one or two standard pipes (Ø80 mm).

Permissible pipe length

Air supply and combustible gas outlet pipe including length of the double pipe
feedthrough.

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Double pipe feedthrough assembly

1. Create two grooves of Ø90 mm at the location of the output.

2. Shorten the double pipe feedthrough to the correct length.

3. Slide the input and output pipe into the grooves.

4. Cover the grooves with wall plates.

5. Fit the exhaust rosters onto the input and output pipe.

6. Attach these to the pipes.

7. Fit the double pipe feedthrough whereby the air supply is sloped outwards and the
flue gas output is sloped towards the unit.

Rotex Heating Systems GmbH 24

Assembly of double pipe extension pipe(s) for balcony gallery output

If free output is hindered by a roof overhang, balcony, gallery etc., the air supply
pipe and combustible gas outlet pipe have to be extended up to at least the front of
the overhanging part.

If the air supply cannot be disrupted by obstacles, such as a console or divider wall
and if the output is not on the edge of a building, the air supply pipe does not need
to be extended.

1. Extend the combustion gas outlet pipe, and possibly also the air supply pipe, of
the double pipe feedthrough with a standard combustion gas outlet and air
supply pipe at the correct length in accordance with the stated measurements.

2. Slide the combustion gas outlet and possibly also the air supply pipe into the
output and input pipe of the double pipe feedthrough.

3. Fit the combustion gas outlet pipe and air supply pipe on a slope towards the
unit.

4. Fit the exhaust rosters on both pipes.

Rotex Heating Systems GmbH 25

5.7.7 Horizontal wall terminal

CAUTION
Pipes for the connection of the air supply and the combustion

gas outlet between the unit and the double pipe feedthrough
must have a diameter of Ø80 mm.

When installing a
diameter of 80/125 mm.

Parallel

Concentric

60/100

Concentric

80/125

RKOMBG22AAV1

100 m

10 m

29 m

RKOMBG28AAV1

85 m

10 m

29 m

RKOMBG33AAV1

80 m

10 m

29 m

Unit category: C13

concentric flue tube system, it must have a

• Horizontal combi feedthrough.
For horizontal facade or roof outlet.

• Combi extension pipe.
For extension of a balcony/gallery output.

Permitted pipe lengths

For parallel: Air supply and combustion gas outlet together, excluding the length of
the combi feedthrough.

For concentric: total pipe length, excluding the length of the combi feedthrough.

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Concentric feedthrough assembly

1. Create a groove at the place of the outlet.

2. Shorten the concentric combi feedthrough to the correct length.

3. Slide the wall feedthrough into the grooves and turn it into such a position that
the flue tube pipe ends up in the highest position.

4. Cover the grooves with wall plates.

5. Fit the combi feedthrough to the boiler directly or via an extension pipe.

Rotex Heating Systems GmbH 26

Assembly of combi extension pipe for balcony/gallery outlet

If free output is hindered by a roof overhang, balcony, gallery etc., the combi
feedthrough pipe must be extended up to at least the front of the overhanging part.

1. Fit the combi extension pipe onto the combi feedthrough.

2. Shorten the combi feedthrough or the combi extension pipe to the correct
length in accordance with the measurements provided.

3. Fit the exhaust roster and attach it to the inner pipe.

4. Fit the combi feedthrough and combi extension pipe on a slope towards the
unit.

Assembly horizontal roof terminal

1. The outlet can be made on any place on the roof surface.

2. Fit a horizontal feedthrough roof panel (D) (suitable for a ø 120 mm pipe) at
the location of the outlet.

3. Fit the exhaust roster onto the combi feedthrough and attach it to the inner
pipe.

4. Slide the combi feedthrough (C) from inside to outside through the horizontal
roof feedthrough panel, in accordance with the given measurements.

5. Fit the combi feedthrough (C) on a slope towards the unit.

Rotex Heating Systems GmbH 27

5.7.8 Vertical roof terminal and vertical double flue system

CAUTION
If the combi feedthrough vertical cannot be applied, the air

supply and combustion gas outlet must be carried out
separately.

Parallel

Concentric

60/100

Concentric

80/125

RKOMBG22AAV1

100 m

11 m

29 m

RKOMBG28AAV1

85 m

10 m

29 m

RKOMBG33AAV1

80 m

10 m

29 m

Unit category: C33

• Combi feedthrough vertical.

Permitted pipe length

For parallel: Air supply and combustion gas outlet together, excluding the length of
the combi feedthrough.

For concentric: total pipe length, excluding the length of the combi feedthrough.

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Assembly vertical roofterminal

1. Fit a vertical feedthrough panel with scale at the location of the outlet on a
sloped roof.
A flat roof requires an adhesive panel for a Ø126 mm pipe.

2. Disassemble the manifold from the combi feedthrough.

3. Slide the combi feedthrough from outside to inside:
In case of a sloped roof, through the vertical feedthrough panel with scale.
In case of a flat roof, through the adhesive panel.

4. In case of a parallel connection, fit the manifold of the combi feedthrough and
secure it with a sheet metal screw or pop rivet.

Rotex Heating Systems GmbH 28

Vertical double pipe flue system

CAUTION

CAUTION

The outputs of the combustion outlet and air supply must be
made in the same pressure surface.

The air supply from the sloped roof surface and the
combustion gas outlet is also possible through a chimney; the
other way round it is not.

1. Fit a standard double-walled combustion gas outlet (Ø80 mm) with Giveg exhaust
hood onto a sloped roof at the location of the outlet.

2. Fit a standard ventilation feedthrough (Ø80 mm) with rain cap in an associated
roof feed though panel for the air supply.

3. Before the combustible gas outlet, fit a standard double-walled combustible gas
outlet (Ø80 mm) with exhaust hood at the location of the outlet.
In case of a flat roof or an architectural chimney, fit a standard ventilation
feedthrough (Ø80 mm) with rain cap in an associated adhesive roof panel.

Two outlets must be at least 200 mm apart.

Rotex Heating Systems GmbH 29

5.7.9 Roof outlet prefab chimney

CAUTION
The connection of the air supply and

between the unit and the prefab chimney can be constructed in
pipes of Ø80 mm.

RKOMBG22AAV1

105 m

RKOMBG28AAV1

90 m

RKOMBG33AAV1

85 m

Unit category: C33

If there is too little space in a shaft, a roof outlet through a prefab chimney may be
required.

The prefab chimney must be fitted with combustible gas outlet openings of at least

2

150cm

per connected unit and must meet the stated minimum measurements.
The supplier must guarantee the proper functioning of the prefab chimney in terms
of wind damage, ice forming, raining in, recirculation etc.

the combustible gas outlet

Permitted pipe lengths at Ø80 mm

Air supply and combustible gas outlet pipe:

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Prefab chimney assembly

The outlet can be made on any place on the sloped or flat roof surface.

Rotex Heating Systems GmbH 30

5.7.10 Roof outlet and air supply from the facade

CAUTION

RKOMBG22AAV1

100 m

RKOMBG28AAV1

85 m

RKOMBG33AAV1

80 m

Unit category: C53

The air supply in the facade must be fitted with an inlet grid (A).

Combustion gas outlet (B) through a prefab chimney, or through a double-walled
roof through feed Ø80 mm with traction extractor hood.

The prefab chimney must be fitted with flue tube openings of at least 150cm
connected unit and must meet the stated minimum measurements. The supplier
must guarantee the proper functioning of the prefab chimney in terms of wind
damage, ice forming, raining in etc.

Permitted pipe lengths at Ø80 mm

Air supply and combustible gas outlet pipe including length of the feedthrough.

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Horizontal air supply assembly

The air supply (A) can be fitted at any place in the facade.

1. At the location of the air supply, create a groove of Ø90 mm.

2. Shorten the air supply pipe to the required length from the wall.

3. Fit the inlet roster and attach it to the pipe.

4. Slide the air supply pipe into the groove and cover the groove with a pipe cover
if necessary.

5. Fit the air supply, at the place of the facade feedthrough, on a slope outward,
in order to prevent raining in.

Assembly of vertical combustion gas outlet

1. Fit a feedthrough panel with scale on a sloped roof surface at the location of
the outlet.
Fit a roof panel suitable for a double-walled combustion gas outlet Ø80 mm
(diameter Ø96 mm) in a flat roof.

2. Slide the double-walled combustion gas outlet from outside to inside through
the roof through feed.
The outlet should end up at least 500 mm above the roof surface.

2

per

Rotex Heating Systems GmbH 31

5.7.11 Air supply from the facade and a roof outlet with communal

IMPORTANT

•

•

•

RKOMBG22AAV1

100 m

RKOMBG28AAV1

85 m

RKOMBG33AAV1

80 m

Flue tube diameter

RKOMBG**AAV1

Number of units

22

28

33 2 110

130

130

3

130

150

150 4 150

180

180 5 180

200

200 6 200

220

220 7 220

230

230 8 230

250

250 9 240

270

270

10

260

280

280

11

270

290

290

12

280

300

300

exhaust system

Unit category: C83
An air supply from the facade and a roof outlet with communal exhaust system is

permitted.

The air supply in the facade must be fitted with an inlet

roster (A).

The communal output system must be fitted with a traction

extractor hood (B).

If the communal output system is situated in the outdoors,

the output pipe must be double-walled or insulated.

Permitted pipe length

Combustion gas outlet pipe between the unit and the communal output system and
air supply pipe between the unit and the inlet roster together:

The minimum diameters of the communal output system based on vacuum

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Communal combustible gas outlet

The output of the combustion gas outlet can be made in any location on the sloping
roof surface, providing the outlet in the roof surface has the same orientation as the
air supply in the facade. On a flat roof, the outlet of the combustion gas outlet must be
made in the “free” outlet area.

Fit a condense output.

Note

The communal outlet is certified in combination with the unit.

Rotex Heating Systems GmbH 32

5.7.12 Combined flue outlet/air inlet system

Parallel

Concentric

60/100

Concentric

80/125

RKOMBG22AAV1

100 m

10 m

29 m

RKOMBG28AAV1

85 m

10 m

29 m

RKOMBG33AAV1

80 m

10 m

29 m

RKOMBG22AAV1 AND

RKOMBG28AAV1

RKOMBG33AAV1

Number
of units

Concentric

Parallel

Concentric

Parallel

Flue
outlet

Air
inlet

Flue
outlet

Air
inlet

Flue
outlet

Air
inlet

Flue
outlet

Air
inlet 2 135

253

135

214

155

291

155

246 3 157

295

157

249

166

311

166

263 4 166

311

166

263

176

330

176

279 5 175

328

175

278

186

349

186

295 6 184

345

184

292

196

367

196

311 7 193

362

193

306

206

386

206

326 8 201

376

201

318

216

404

216

342 9 210

393

210

332

226

423

226

358

10

219

410

219

347

236

442

236

374

11

228

427

228

361

247

463

247

391

12

237

444

237

375

257

482

257

407

13

246

461

246

389

267

500

267

423

14

255

478

255

404

277

519

277

439

15

264

494

264

418

287

538

287

454

16

272

509

272

431

297

556

297

470

17

281

526

281

445

307

575

307

486

18

290

543

290

459

317

594

317

502

19

299

560

299

473

328

614

328

519

20

308

577

308

488

338

633

338

535

IMPORTANT

•

•

hood, a declaration of no objection or a Gas certificate from the

•

Unit category : C43

A roof outlet through a Combination Air Supply-c ombustion gas

outlet system is permitted.

For the communal combustion gas outlet hood and air supply

Gastec Gas institute is required.

The passage of the pressure balancing opening at the bottom of

the communal air supply and flue gas outlet system is equal to

0.44 times the flue gas outlet surface.

he communal air supply and the communal output of the combustion gases may be
carried out concentrically or separately.

Permitted pipe length

For parallel: Air supply and combustion gas outlet together, excluding the length of the
combi feedthrough.

For concentric: total pipe length, excluding the length of the combi feedthrough.

T

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

The minimum diameters of the communal air supply and flue tube system based
on the continuation sheet 2001-02 inspection requirements no, 138 of Gastec.

Rotex Heating Systems GmbH 33

5.7.13 Concentric horizontal flue gas outlet, vertical part air-surrounded by shaft

Unit category : C93

A flue tube system according to C93 (C33) is permitted when using the output
material provided by Rotex.

Permitted pipe length and system requirements

Air supply and combustion gas outlet pipe between unit and concentric horizontal
shaft 80/125 with a maximum length of 10 meters. The flue tube must be fitted on a
slope towards the boiler.

Flue outlet in shaft with 80 mm diameter (rigid or flexible) with a maximum length of
25 meters.
When using plastic flue tube material, a minimum temperature class of T120
applies.

The transfer bend between concentric and vertical flue connection in the shaft must
be supported in the manner instructed by Rotex.

The assembly instruction of the manufacturer of the flue tube system must always
be followed in full.

The minimum interior measurement of the shaft must be 200 x 200 mm.
In existing installations, the shaft must be inspected and if necessary cleaned before
the new installation is commissioned.

Combustion gas outlet and air supply pipe

For assembly, see par. 5.7.5 General assembly.

Note:

The outlet system is certified in combination with the unit.

Rotex Heating Systems GmbH 34

6 C OMMISSIONING THE UNIT AND THE INSTALLATION

In case of a CH pressure lower than 0.5 bar, the CH

WARNING
If the siphon is not filled with water, combustion gases may be

released into the room.

WARNING
If an additive is added to the CH water, it must be suitable for

the materials used in the unit, such as copper, brass, stainless
steel, steel, plastic and rubber. The additive should preferably
have a KIWA/ATA/Atest certification.

6.1 Filling and air purge of unit and installation

6.1.1 CH system

1. Insert the unit's plug into a socket.
The unit may carry out a self-check: 2 (on service display).
The unit will then go into the off setting: - (on service display) and the CH

pressure is shown on the temperature display.

pressure will be displayed flashing on the display.
In the off setting, the CH pressure will be displayed.

2. Connect the filling hose to the fill/drain tap and fill the installation with clean
drinking water, up to a pressure between 1 and 2 bar if the installation is cold
(to be read from the temperature display).

3. Aerate the system with the manual aerator (A).
Upon request, an automatic aerator can be fitted onto the unit instead of the
manual aerator.

4. Aerate the installation with the manual aerators on the radiators.

5. Top up the CH installation if the pressure has dipped too low due to the
aeration.

6. Check all couplings for leaks.

7. Check whether the siphon is filled with water.

6.1.2 DHW provision

1. Open the main tap to bring the DHW section up to pressure.

2. Aerate the exchanger and the pipe system by opening a DHW tap.
Leave the tap open until all air has flowed out of the system.

3. Check all couplings for leaks.

6.1.3 Gas supply

1. Aerate the gas pipe with the initial pressure measuring nipple (D) on the gas
block.

2. Check all couplings for leaks.

3. Check the initial pressure and offset pressure (see par. 7.7).

Rotex Heating Systems GmbH 35

6.2 Commissioning the unit

Reading

Operating

1

On/off A

On/off button

2

CH operation or setting maximum CH temperature

B Tap/CH butt on to set the re quired temperature

3

Tap operation or setting tap temperature

C - button

4

Required te m perature CH or tap water in °C / pressure CH water in bar / malfunc tion code

D + button

5

Tap comfort function eco

E Tap comfort function off / eco / on butt on

6

Tap comfort function on

F Service button / actual temperature during heat request

7

Operating code

G Reset button

8

Flashing in case of a malf unction

After the following actions have been completed, the unit may be commissioned.

1. Press the button to commission the unit.
The heat exchanger will be heated up, and on the service display,

and/or OpenTherm regulation).

2. Set the pump setting depending on the set maximum power and the water side resistance of the installation. For the water head of the
pump and the loss of pressure of the unit: (see par. 7.4).

3. Set the room thermostat higher than the room temperature. The unit will now go into CH operation: 5 on the service display.

4. Fire up the installation.

5. Check whether the set maximum CH power matches the requested value. If necessary, the maximum CH power can be adjusted (see par.

7.2 parameter c and 3 and par. 7.3)

6. Check whether the set minimum and maximum value of the pump characteristic have been set correctly (see par. 7.2 and parameter 3. and
c. and par. 7.4)

7. Switch the unit off.

8. Purge the air from the unit and the installation after cooling down (top up if necessary).

9. Switch the unit on.

10. Check the heating and the hot water provision for the correct functioning.

11. Instruct the user on the filling, air purging and functioning of the heating and the hot water provision.

Comments

• The unit is fitted with an electronic boiler controller which ignites the boiler controller

and controls she modulating pump, at every heat request from the heating or from
the hot water provision.

• The circulation pump will run at every heat request for the heating. The pump has a

post-running time of 1 minute. The post-running time can be changed upon request
(see par. 7.2).

• The pump will run automatically 1 time per 24 hours, for 10 seconds, in order to

prevent it from getting stuck. This automatic switching on of the pump takes place 24
hours after the last heating request. To change the time, the room thermostat must
be turned up for a moment at the requested time.

• For the hot water provision, the pump will not run.

3, 4 and 7 appear (Depending on status of external eco switch

Rotex Heating Systems GmbH 36

6.3 Switching off the unit

CAUTION

freezing.

Drain the unit and the installation, if the mains
electricity supply is interrupted and there is a risk of

1. Remove the plug from the socket.

2. Drain the unit with the filling/draining tap.

3. Drain the installation at the lowest point.

4. Close the main tap of the hot and cold water supply to the unit.

5. Drain the unit by loosening the domestic hot water couplings under the unit.

6. Empty the siphon.

6.3.1 Frost protection

• In order to prevent the condense outlet from freezing, the unit must be installed in a

frost-free room.

• The unit is fitted with frost protection in order to prevent it from freezing. If the

temperature of the heat exchanger drops too low, the boiler will switch on until the
heat exchanger has heated up. If there is the possibility that the installation (or a
part thereof) may freeze, an (external) frost thermostat must be fitted at the coldest
place, on the return pipe. This must be connected in accordance with the electrical
diagram (see par. 10.1).

Note
If an (external) frost thermostat has been fitted on the installation and has been
connected to the unit, it will not be active if the unit on the operating panel is switched

off (

- on service display).

Rotex Heating Systems GmbH 37

7 SETTING AND ADJUSTMENT

The functioning of the unit can be influenced by means of the (parameter) settings in the boiler
controller. Part of this can be configured directly via the operating panel, another part can only
be adjusted by means of the service code.

7.1 Direct via operating panel

The following functions can be operated directly.

Unit on/off

The button activates the unit.
When the unit is active, the green LED above the button will be lit. When the unit is

off, one bar will be lit on the service display (
electricity supply. In this operation setting, the temperature display will also show the
pressure in the CH installation (in bar).

-

) to show the unit is connected to the

Summer mode.

When parameter q is set to a value unlike 0 summer mode can be activated pressing the

button.
In Summer mode the central heating has been shut off while DHW remains active.
Summer mode can be activated by pressing the button. again after activating the boiler.
On the display [So], [Su] or [Et] appears (the code on the display depends on the setting of

parameter q).
Summer mode can be deactivated by pressing the button twice. The boiler will then be

in normal functional mode again.

Tap comfort

The tap comfort function can be operated with the tap comfort button and has the following
settings:

• On: ( LED on) The tap comfort function of the unit is continuously switched on.

The heat exchanger is continuously kept warm. The unit always immediately
provides warm water.

• Eco: ( LED on) The tap comfort function of the unit is self-learning. The unit will

adjust to the usage pattern of the domestic hot water. This means the heat
exchanger will not be kept warm during the night or during longer absences.

• Off: (Both LEDs off.) Off: The heat exchanger is not kept warm which means the

supply of domestic hot water takes a bit of time. If there is no desire for domestic hot
water, or of immediate supply hereof, the tap comfort function can be switched off.

Resetting

Check the nature of the malfunction on the basis of the malfunction codes under par. 8.2 and if
possible, resolve the cause of the malfunction before resetting the unit.

If a locking malfunction is indicated by means of a flashing LED above the button and a
number on the display, the unit can be restarted by pressing the reset button.

Change settings of the various functions:

Pressing the button for 2 seconds, will take you to the users setting menu (LED at and the
number display will start to flash). If you press the button repeatedly, a different function LED

will flash each time. When the LED flashes, the appropriate function can be set with the and

button. The set value is displayed on the display.
The on/off button closes the settings menu and the changes are not saved.
The reset button closes the settings menu and saves the changes.
When no button is pressed for 30 seconds, the settings menu will automatically be closed and

the changes are saved.

Maximum CH leaving water temperature

Press the button until the LED at starts flashing.
Use the and button to enter the temperature between 30°C and 90°C

(standard setting 80°C).

Tap water temperature

Press the button until the LED at starts flashing.
Use the and button to enter the temperature between 40°C and 65°C

(standard setting 60°C).

Rotex Heating Systems GmbH 38

RKOMBG ** AAV1

Parameter

Description

22

28

33

Settings reach

0

Service code [15]

- - -

Access to installers settings, the service code must be
entered (=15)

1

Installation type

0 0 0

0= combi

3= Solo

2

CH pump setting

0 0 0

0= pump post-running time active

3

Set maximum CH power

60

60

60

Setting reach set value parameter c up to 100%
(100 % = 99 + 1x )

3.

Maximum capacity modulating CH pump

80

80

80

Setting reach set value parameter c. up to 100%

4

Set maximum hot water power

99

99

99

Setting reach set value parameter d up to 100%

5 Min. leaving water temperature of the fuel

line

25

25

25

Setting reach 10°C to set value parameter 5

5.

Max setting value leaving water temperature
via operating panel

90

90

90

Setting reach 30°C to 90°C

6 Min. outdoor temperature of the fuel line

-7

-7

-7

Setting reach -9 to 10°C

7 Max. outdoor temperature of the fuel line

25

25

25

Setting reach 15°C to 30°C

8 CH pump post-running time after CH

operation

1 1 1

Setting reach 0 to 15 minutes

9

CH pump post-running time after boiler
operation

1 1 1

Setting reach 0 to 15 minutes (n/a to Combi unit)

A

Setting three-way valve or electrical valve

0 0 0

0= powered during CH operation

6= Powered during hot water operation

b

Booster

0 0 0

0= off
1= on

7.2 Parameter settings via the service code

The parameters of the boiler controller have been configured in the factory in accordance with the following table.
These parameters can only be changed with the service code. Take the following actions to activate the program memory:

1. Press the and the button simultaneously, until a 0 appears on the service display and a 0 on the temperature display.

2. Use the button to enter 15 (service code) on the temperature display.

3. Use the button to set the parameter you wish to configure, on the service display.

4. Use the and button to set the parameter to the required value (visible) on the temperature display.

5. After all the required changes have been entered, press the button until P appears on the service display..
The boiler controller has now been reprogrammed.

Note
Pressing the button will take you out of the menu without saving the parameter changes.

Example: Change maximum CH power

1. Press the and the button simultaneously.

2. Use the button to go to 15 .

3. Press the button 3 x. 60 and 3 will appear on the display.

4. Use the button to change the 60 to 70.

5. Press the button until P appears.

6. The change has now been implemented. The maximum CH power has been increased from 60 to 70 %.

1= Solo RKOMBG22AAV1 + boiler
2= Tap (hot water only)

1= pump continuously active
2-3-5= not active

1= powered during hot water operation and rest
2= powered during every heat request (CH, hot water
and continuous heating function)
3= group regulation
4= External DHW tank pump
5= Powered during CH demand and rest

Rotex Heating Systems GmbH 39

C

Step-by-step modulation

1 1 1

0= step-by-step modulation off during CH operation

1= step-by-step modulation on during CH operation

enabled

c

Minimum rpm CH

30

30

30

Setting reach 20 to 50%

c.

Minimum capacity modulating CH pump

40

40

40

Setting reach 15 to set value par. 3.

d

Minimum rpm hot water

25

25

25

Setting reach 20 to 50%

E

Min. leaving water temperature at OT
(OpenTherm) or RF thermostat

40

40

40

Setting reach 10°C to 60°C

E .

Reaction OT and RF room thermostat

1 1 1

0= do not respond to hot water request if requested

leaving water temperature (on/off function)

F

Start rpm CH

70

60

50

Settings reach 50 to 99% of the set maximum rpm

F .

Minimum start rpm hot water

70

60

50

Settings reach 50 to 99% of the set maximum rpm

h Max. rpm fan

50

50

50

Setting reach 40 to 50 (40=4000 rpm, 50=5000 rpm).
Please note: Factory setting, rpm may deviate

n

Regulated temperature during boiler
operation (Ta)

80

80

80

Setting reach 60°C to 90°C

n.

Hot water temperature at Comfort/Eco

0 0 0

Setting reach 0 or 40°C to 60°C
temperature

O.

Wait time CH request response

0 0 0

Settings reach 0 – 15 minutes

o

Waiting time CH operation after hot water
operation

0 0 0

Settings reach 0 to 15 minutes

o.

Number of eco days

3 3 3

Setting reach 0,1 to 10

1 – 10 number of eco days

P

Anti-recycling time during CH operation

5 5 5

Minimum switch off time on boiler water temperature
Can be set to 0 to 15 minutes

P.

Reference value hot water

24

30

36

24 = RKOMBG22AAV1
36 = RKOMBG33AAV1

q

Summer mode

0 0 0

0 = Summer mode deactivated

(code in display : Et)

2= Power control by Open Therm room thermostat

temperature is lower than the set value par. E

1= respond to hot water request with minimum

leaving water temperature limited to set value par.
E

2= respond to hot water request with maximum

0 = reheating temperature is equal to hot water

Rotex Heating Systems GmbH 40

0 = Comfort function controllable by Open Therm
room thermostat

30 = RKOMBG28AAV1

1 = Summer mode to be activated by button
(code in display : Su)
2 = Summer mode to be activated by button
(code in display : So)
3 = Summer mode to be activated by button

7.3 Setting maximum CH power

Desired CH power in kW (approx.)

Settings on service display

RKOMBG ** AAV1

(in % maximum rpm)

22

28

33 22.7

28.4

31.9

100

20.5

25.6

28.8

90

18.2

22.9

25.6

80

16.0

20.1

22.4

70

13.7

17.4

19.2

60

11.5

14.6

16.0

50

9.3

11.8

12.8

40

5.9

7.7

8.0

25

The minimum feedthrough amount (l/h)

Set power (kW)

155

5.4 kW

240

8.5 kW

510

17.8 kW

750

26.2 kW

The maximum CH power is set to 60% in the factory. If more power is required for the
CH installation, the maximum CH power can be changed by adjusting the rpm of the
fan. See table: Setting CH power.

This table shows the relation between the rpm of the fan and the unit power.

Caution:
The power is slowly increased when the fire is lit and is lowered when the set leaving

water temperature is reached (modulation on Tsupply).

7.4 Set pump capacity

The RKOMBG*AAV1 CH boilers are fitted with a modulating A-class pump which
modulates on the basis fo the CH power provided. The minimum and maximum
capacity of the pump can be adjusted with the parameters 3 and c. Also see par. 7.2.
The set value of parameter 3. (max. pump setting) is the percentage of the maximum
pump capacity and is linked to the set maximum CH power as set with parameter 3

The set value of parameter c. (min. pump setting) is linked to the minimum CH-power
as set with parameter c

If the CH load modulates between the minimum and maximum value, the pump
capacity will modulate along proportionately.

Pressure loss graph unit CH side

A. RKOMBG22AAV1
B. RKOMBG28AAV1
C. RKOMBG33AAV1

7.5 Weather dependent regulation

When connecting an outdoor sensor, the leaving water temperature is automatically
regulated dependent on the outdoor temperature, in accordance with the set fuel line.

The maximum leaving water temperature (Tmax) is set via the temperature display. If
so desired, the fuel line can be changed by using the service code (see par.7.2). The
weather dependent regulation only functions with an on-off thermometer. When
applying an Open Therm room thermostat, the outside temperature is passed on, but
the fuel line of the CH boiler is not active.

Fuel line graph

X. T outside in °C
Y. T leaving water in °C

A. Factory setting

(Tmax CH = 80°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C)

B. Example

(Tmax CH = 60°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C)

Rotex Heating Systems GmbH 41

7.6 Conversion to different type of gas

CAUTION

Work on gas carrying parts may only be carried out by
a certified installer.

CAUTION

above table.

Gas type

Natural gas L

Propane P

Gas category

2E/H G20

3P / G31

CO2% at Low setting (L) ( and )

See par.

found.

See par.

found.

CO2% at Low setting (H) ( and 2x)

See par.

found.

See par.

found.

Gas supply pressure (mbar)

30/37/50

mbar

Gas dosing ring
tunnel venturi (see drawing )

Natural gas L

Propane P

If a unit is connected to a different type of gas than the one it has been set to by the
manufacturer, the gas dosing ring must be replaced. Conversion sets for other types of gas are
available to order.

Converting the dosing ring

1. Switch off the boiler and remove the plug from the socket.

2. Shut the gas valve.

3. Remove the front panel from the unit.

4. Loosen the coupling (A) above the gas block and turn the gas mixing tube (B) backwards.

5. Replace the O-ring (C) and the gas dosing ring (D) by the rings in the conversion set.

6. Reassemble it in reverse order.

7. Open the gas valve.

8. Check whether the gas couplings before the gas block are sealed.

9. Enter the plug in the socket and switch on the boiler.

10. Check whether the gas couplings after the gas block are sealed (during operation).

11. Now check the setting of the gas/air ratio (see par. 7.7).

12. Put a sticker of the configured gas type on top of the existing sticker at the gas block.

13. Put a sticker of the configured gas type at the type plate.

14. Return the front panel onto the unit.

7.7 Gas/air regulation

The gas/air regulation has been set at the factory and does not require any adjustments, in
principle.

The setting can be checked by measuring the CO
measuring the offset.

In case of any disturbance, replacement of the gas block or conversion to a different type of
gas, the regulation must be checked and set in accordance with the following tables.

With open cover

With open cover

percentage in the combustion gases or by

2

Error!

Reference

source not

Error!

Reference

source not

Error!

Reference

source not

Error!

Reference

source not

20 mbar

(only valid in combination with fan with integrated

RKOMBG22AAV1 505 410
RKOMBG28AAV1 600 480
RKOMBG33AAV1 655 525

CO2 check must be carried out with open cover. If the cover is
shut, the CO

2% may be higher than the values stated in the

Rotex Heating Systems GmbH 42

7.8 Setting gas/air regulation

IMPORTANT

Ensure the
completed before inserting the probe in the sample point.

IMPORTANT

Wait for the gas boiler to run stable. Faulty measurements may
occur if the measuring probe is connected before the boiler is
running

CO2 value at
maximum power

Natural gas
G20

Natural gas G25

Propane G31
(30/50 mbar)

Propane G31
(37 mbar)

Maximum value

9.6

8.3

10.8

Minimum value

8.4

7.3

9.8

IMPORTANT
It is NOT possible to adjust the CO

carried out. If the CO
contact your local service department.

CO2 value at
minimum power

Natural gas
G20

Natural gas G25

Propane G31
(30/50 mbar)

Propane G31
(37 mbar)

Maximum value

(a)

Minimum value

8.4

7.4

9.4

9.4

The CO2 setting has been set at the factory and does not require any adjustments, in principle. The
setting can be checked by measuring the CO

percentage in the combustion gases. In case of any

2

disturbance of the setting, the replacement of the gas valve or the conversion to a different type of
gas must be checked, and if necessary set in accordance with the following instructions. Always
check the CO

percentage when the lid is open.

2

Checking the carbon dioxide setting

1 Switch off the heat pump module with the user interface.
2 Switch off the gas boiler with the button. - appears on the service display.

3 Remove the front panel from the gas boiler.
4 Remove the sample point (a) and enter an appropriate chimney analysis probe.

start-up procedure of the analysis machine has been

stable. We recommend you wait for at least 30 minutes.

5 Switch on the gas boiler with the button and create a request for space heating.
6 Select the High setting by twice pressing the and buttons simultaneously. A capital letter

"H" will appear on the service display. The user display will show a Busy symbol. Do NOT carry
out a test when a small letter "h" is shown. If this is the case, press and again.

7 Allow the display values to stabilize. Wait at least 3 minutes and compare the CO

the values in the following table.

8 Note the CO

percentage at maximum power. This is important in relation to the following steps.

2

percentage when the test program is being

2

percentage deviates from the values in the above table,

2

9 Select the Low setting by once pressing the and buttons simultaneously. "L" appears on

the service display. The user display will show a Busy symbol.

10 Allow the display values to stabilize. Wait at least 3 minutes and compare the CO

the values in the following table.

percentage to

2

percentage to

2

(a) CO2 value at maximum power registered at setting High.

Rotex Heating Systems GmbH 43

11 If the CO2 percentage at maximum and minimum power is within the reach stated in the above

CAUTION

Work on gas carrying parts may ONLY
qualified, competent

IMPORTANT
Only adjust the CO

sure the adjustment is necessary. No adjustments may be made to the gas
valve without prior permission from your
local Rotex distributor. In Belgium, the gas valve may NOT be adjusted and/or
the sea

Measured value at

Set values CO2 (%) at minimum power (front lid open)

Natural gas 2H (G20, 20 mbar)

Propane 3P
(G31,30/50/37 mbar)

10.8 - 10.5±0.1

10.6

10.3±0.1

10.4

10.1±0.1

10.2

9.9±0.1

10

9.8±0.1

9.8

9.6±0.1

9.6

9.0±0.1

-

9.4

8.9±0.1

9.2

8.8±0.1

9.0

8.7±0.1

8.8

8.6±0.1

8.6

8.5±0.1

tables, the CO

setting of the boiler is correct. If NOT, adjust the CO2 setting in accordance with

2

the instruction in the following chapter.

12 Switch off the unit by pressing the button and return the sample point to its position. Make sure

it is gas tight.

13 Return the front panel to its place.

be carried out by

individuals.

Adjusting the carbon dioxide setting

setting when you have first checked it and you have made

2

l may NOT be removed or broken. Contact your distributor.

1 Remove the cap (A) which covers the adjuster screw.
2 Turn the screw (B) to the right to increase the CO

decrease it. See the following table for the desired value.

percentage, and to the left to

2

maximum power

3 After measuring the CO

percentage and adjusting the setting, replace the cover

2

cap and the cap of the sample point. Make sure they are gas tight.

4 Select the High setting by twice pressing the and buttons simultaneously.

A capital letter will appear on the service display.

5 Measure the CO

values in the table which indicates the CO

percentage. If the CO2 percentage still deviates from the

2

percentage at maximum power,

2

contact your local distributor.

6 Press + and - simultaneously to leave the test program.
7 Return the front panel to its place.

Rotex Heating Systems GmbH 44

8 MALFUNCTIONS

Temperature display

Description

Possible cause/solution

• Unit is off.

10, 11, 12, 13, 14

Sensor fault S1

Air in the installation. Purge the air from the boiler and CH installation.

• Replac e S 1.

20, 21, 22, 23, 24

Sensor fault S2

• Check wiring for break.
Replace S 2.

0

Sensor fault after self-check

• Replace S1 and/or S2.

1

Temperature too high

Air in installation. Purge the air from the boiler and CH installation.

Pump is not running. Reset or replace the pump, see par. 8.2.10

2

Switch S1 and S2

• Check cable harness.

• Replace S1 or S2.

4

No flame signal

Main gas valve not opened.

• Check earthing.

5

Poor flame signal

Condense output blocked.

Check air supply and gas output for possible recirculation of flue gases.

6

Flame detection error

Replace ignition cable + spark plug.

• Replace boiler controller.

8

Fan rpm is not correct

• Fan is coming up against cover insulation.

• Replace boiler controller.

27

Short circuit outdoor sensor

• Check the wiring of the outdoor sensor.

• Replace boiler controller for the appropriate version.

29, 30

Gas valve controller fault

• Replace boiler controller.

Only replace faulty parts with the original Rotex parts.

8.1 Show last malfunction

Use the key to switch the unit off, and press the button.
The red malfunction LED is lit continuously, and the latest fault code is shown flashing on the temperature display.
If the unit has never detected a locking malfunction, no code will be displayed.
The last locking malfunction can be deleted by briefly pressing the button while pressing the button.

8.2 Malfunction codes

If the malfunction LED is flashing, the boiler controller detects a fault. A malfunction code will be shown on the temperature display.
When the malfunction is rectified, the boiler controller can be restarted by pressing the reset button.

The following faults can be distinguished:

•

• Check the connection of the ntc on the hot water tube.

• Check wiring for break.

•

•

•

•

• Gas supply pressure too low, or disappears.

• Condense output blocked.

• Check ignition unit and ignition cable.

• No or incorrect ignition distance, check this using the checking mold.

• Gas block or ignition unit is not receiving electrical current.

•

• Gas supply pressure too low, or disappears.

• Check ignition unit and ignition cable.

• Check setting of gas block.

• Check earthing.

•

•

• Replace ignition unit.

• Wiring between fan and cover.

• Check wiring or plug for lack of wire contact, measure 25-27V dc.

• Check and/or replace fan.

• Replace outdoor sensor.

• Boiler controller is not suitable for this application.

Failing to fit or incorrectly fitting the sensors S1 and/or S2 may lead to serious damage.

Rotex Heating Systems GmbH 45

8.3 Other faults

Possible causes:

Solution:

Gas supply pressure too high.

Yes 

The home pressure controller may be faulty. Contact the energy company.

No 

Check the ignition pin distance with the checking mold.
Replace the ignition pin.

No 

Gas/air regulation not correctly configured.

Yes 

Check the setting, see Gas air regulation par.7.7 and par. 7.8.

No 

Check the ignition pin distance with the checking mold.
Replace the ignition unit on the gas block. Replace the ignition pin.

Possible causes:

Solution:

Gas supply pressure too low. Lower than 20
mbar.

No 

Recirculation combustion gases.

Yes 

Check the combustion gas outlet and the air supply system.

No 

Gas/air regulation not configured correctly.

Yes 

Check the setting, see Gas air regulation par.7.7 and par. 7.8.

No 

Boiler controller gasket faulty.

Yes 

Replace the boiler controller gasket.

No 

Boiler controller faulty.

Yes 

Replace the boiler controller.

Possible causes:

Solution:

The service display shows nothing.

Yes 

Check whether the plug is in the socket.

No 

The service display shows nothing.

Yes 

Check the fuse, see Electrical diagram par. 10.1

No 

boiler is off.

Switch on the boiler with the button.

No 

Check the wiring.

Replace the weather-dependent regulation.

No 

Check the electricity supp l y.
Check connector X2 and X4.

No 

Replace the faulty controller. Check the wiring in accordance with the diagram.
Check the connector X4.

Checking mold ignition pin positio

Pin must touch test tool

Pin must not touch test tool

8.3.1 Boiler controller is noisy when igniting

Incorrect ignition distance. Yes 

Weak spark. Yes 

8.3.2 Boiler controller resonates

Yes  The home pressure controller may be faulty. Contact the energy company.

Check and/or replace ignition cable.

8.3.3 No heating (CH)

The service display shows a hyphen (

Room thermostat/weather dependent regulation
not connected or faulty.

Pump is not running. Display shows 80 and 1. Yes 

No electrical supply (24 V). Yes 

Rotex Heating Systems GmbH 46

-

). The

Yes 

Yes 

Check OpenTherm, On/off connection of the unit, or the connection between CH
boiler and RF room thermostat .Replace the thermostat.

Replace the faulty controller.

8.3.4 The power is reduced

Possible causes:

Solution:

Clean the unit and siphon.
Check the flue tube and the air supply system.

Possible causes:

Solution:

Water pressure in installation is too low.

Yes 

Top up the installation. See par. 6.1.1.

No 

Room thermostat is not set correctly.

Yes 

Check the setting and adjust if required.

No 

Increase the CH temperature See Operation CH. If there is an outdoorsensor:
Check the outdoor sensor for short circuit: rectify this.

No 

Check the ΔT (± 20° C) between the supply and return CH. Ensure there is good
flow through the installation.

No 

The boiler power is not set correctly.

Yes 

Adjust the boiler power. See Setting maximum CH power.

No 

No heat transfer due to contamination in the CH
boiler/installation.

Possible causes:

Solution:

The service display shows nothing.

Yes 

Check whether the plug is in the socket.

No 

The service display shows nothing.

Yes 

Check the fuse, see Electrical diagram par. 10.1

No 

Flow sensor does not work.

Yes 

Replace the flow sensor.

No 

Tap flow < 1.5 l/min.

Yes 

Increase the tap flow.

No 

No electricity supply on flow sensor (5V DC).

Yes 

Check the wiring in accordance with the diagram.

No 

S3 faulty.

Yes 

Replace S3.

No 

The thermostatic tap only lets through cold water. This means the tap flow through
the boiler remains under 1.5 l/min. Check the thermostatic tap.

Possible causes:

Solution:

Reduce the tap flow. Check the dosing disk (RKOMBG22AAV1 and
RKOMBG28AAV1).

No 

DHW temperature set too low.

Yes 

Increase the DHW temperature, see par. 7.1.

Unwanted circulation in the ch circuit during hot water request due to thermosiphon
thermosiphon effect or a two-way valve in case of a second pump.

No 

Insufficient heat transfer due to lime scale or
side.

At high rpm, the power has decreased. Yes 

8.3.5 CH is not reaching correct temperature

Temperature is set too low. Yes 

No flow through the installation. Yes 

Yes  Rinse the CH boiler/installation on the side of the CH.

8.3.6 No domestic hot water

The thermostatic shower or bath tap is faulty. Yes 

8.3.7 DHW is not reaching the correct temperature

Tap flow too high. Yes 

CH installation becomes hot during tapping. Yes 

contamination in the CH boiler on the tap water

Rotex Heating Systems GmbH 47

Yes  Remove lime scale or rinse the CH boiler on the tap water side.

effect or second pump in the CH circuit. Install a check valve in case of

Possible causes:

Solution:

Check the wiring.

Replace the weather-dependent regulation.

No 

Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in
valve in case of a second pump.

Possible causes:

Solution:

Too high or too low mains voltage.

Yes 

Check the mains voltage.

No 

Pump temperature is too high.

Yes 

Check the water and ambient temperature.

Possible causes:

Solution:

Reset the pump by switching off the unit by pressing the on/off button for at least 20

Replace the pump.

8.3.8 CH installation stays warm unwanted

Room thermostat/weather dependent regulation
faulty or short circuited.

CH installation is heated due to Tap comfort.
The service display regularly shows code 7.

Yes 

Yes 

Check OpenTherm, On/off connection of the unit, or the connection between CH
boiler and RF room thermostat. Replace the thermostat.

the CH circuit. Install a check valve in case of thermosiphon effect or a two-way

8.3.9 A-label pump LED flashes intermittently red/green

8.3.10 A-label pump LED flashes red

Pump stopped. Yes 

seconds (attention: if the pump has been set to continuous, the pump can only
be reset by pulling the plug from the socket).

Rotex Heating Systems GmbH 48

9 MAINTENANCE

CAUTION

CAUTION

contain ceramic fibers.

The unit and the installation must be checked by a certified installer, and cleaned if
necessary.

Work on gas carrying parts may only be carried out by a certified
installer.
After work, check the flue gas carrying parts for air tightness.
If the unit has just been operational, some parts may be hot.

9.1.1 Disassembly

1. Switch the unit off with the button.

2. Remove the plug from the socket.

3. Shut the gas valve.

4. Open the display valve and loosen the two screws on the left and right of the
display, and remove the front panel.

5. Wait until the unit has cooled down.

6. Unscrew the coupling nut at the bottom of the flue tube to the left.

7. Slide the flue gas pipe upwards (1) with a turn to the left until the bottom of the pipe
reaches above the coupling of the condense outlet container. Pull the bottom of the
pipe forward (2) and remove the pipe by rotating it to the left and down (3).

8. Lift the condense outlet tray from the connection of the siphon (4) on the left, and
turn it to the right with the siphon connection over the edge of the bottom tray (5).
Push down the condense outlet tray at the back from the connection to the heat
exchanger (6) and remove it from the unit.

9. Take the connector from the fan and the ignition unit from the gas block.

10. Disconnect the coupling under the gas block.

11. Unscrew the shouldered bolts (hex key) of the front lid and remove it to the front,
complete with gas block and fan (be careful not to damage the boiler controller,
insulation plate, gas block, gas pipe and fan). Lay the removed front lid with the foot
rests horizontally on a flat surface.

12. The boiler controller and the integrated insulation plate do not require any
maintenance (do not need cleaning). Therefore never use a brush or compressed
air to clean these parts, in order to avoid dust developing.

9.1.2 Cleaning

1. Clean the heat exchanger with a brush or vacuum cleaner, from top to bottom.

2. Clean the bottom of the heat exchanger.

3. Clean the condense outlet tray with water.

4. Clean the siphon with water.

5. Only clean the bottom of the front plate.

The integrated insulation plate and boiler controller gasket

Rotex Heating Systems GmbH 49

9.1.3 Fitting

When assembling, check the various seals for damages, hardening,
(hairline) fractures and/or discoloration. Where necessary, place a
new seal. Also check the correct positioning.

1. Check that between the flange of the shoulder bolt and the front plate, there is a
thin layer of ceramic grease.
If there is no or insufficient grease, it must be applied (see image).

2. Check whether the seal around the front lid has been fitted correctly. Place the
front lid on the heat exchanger and secure it with the special shoulder bolts (hex
key). Evenly tighten the shoulder bolts crosswise manually (10 – 12 Nm). For the
sequence of tightening, see image.

3. Evenly manually tighten the boiler controller bolts crosswise.

4. Fit the gas coupling under the gas block.

5. Fit the connector onto the fan and the ignition unit onto the gas block.

6. Fit the condense outlet tray by sliding it into the outlet stump of the switcher (1), with the
siphon connection, before the bottom tray. Then turn the condense outlet tray to the left (2)
and push it down into the siphon connection (3). Make sure that the rear of the condense
outlet tray ends up resting on the cam at the back of the bottom container (A).

7. Fill the siphon with water and fit it onto the connection under the condense outlet tray.

8. Slide the flue gas pipe, while turning it to the left, with its top around the flue gas adapter in
the top lid. Insert the bottom into the condense outlet tray, drag the gasket down and
tighten the swivel head to the right.

9. Open the gas valve and check the gas couplings under the gas block and on the assembly
bracket for leakage.

10. Check the CH and the water pipes for leakage.

11. Insert the plug into the socket.

12. Switch the unit on with the button.

13. Check the front lid, the connection of the fan to the front lid and the flue tube parts for leaks.

14. Check the gas-air regulation (see par. 7.7and par. 7.8) and check the gas coupling on the
gas block for gas tightness.

15. Assemble the cover and tighten the two screws to the left and the right of the display, and
close the display cover.

16. Check the heating and the hot water provision for correct functioning.

Rotex Heating Systems GmbH 50

10 TECHNICAL SPECIFICATIONS

Unit category

C13; C 33; C43; C53; C63; C83: C93

Initial gas pressure

G20 ; 20 mbar; G25: 25 mbar; G31: G31: 28-50 mbar

Suitable for gas

IT, ES, CZ : II2H3P

PL : II2E3P

Technical data

RKOMBG*AAV1

22

28

33

Domestic water

Nom. load upper value

kW

6.1 – 25.9

8.0 – 32.3

8.3 – 36.3

Nom. load lower value

kW

5.6 – 23.3

7.1 – 29.1

7.6 – 32.7

Nom. output

kW

5.9 – 22.7

7.7 – 28.4

8.2 – 32.1

Domestic water threshold

l/min 2

Domestic water quantity 60°C

l/min 6 7.5

9

Domestic water quantity 40°C (mixed)

l/min

10

12.5

15

Domestic water temperature

°C 60

Effective unit wait time*

sec

<1

Domestic water side pressure difference

kPa

See par. 5.2

CH

Nom. load upper value**

kW

6.1 – 25.9

8.0 – 32.3

8.3 – 36.3

Nom. load lower value**

kW

5.6 – 23.3

7.1 – 29.1

7.6 – 32.7

Output at 80/60°C Min - Nom

kW

5,4 - 22,7

7,1 - 28,4

7,4 - 32,1

Output at 50/30°C Min - Nom

kW

5,9 - 23,8

7,7 - 31,1

8,2 - 35,0

Nom. output

kW

5.9 – 22.7

7.7 – 28.4

8.2 – 32.1

Max. CH water pressure

bar

3

Max. CH water temperature

°C

90

Other data

Gas consumption (G25)

m3/h

0.67 – 2.80

0.85 – 3.50

0.91 – 3.93

Gas consumption (G20)

m3/h

0.58 – 2.42

0.74 – 3.02

0.79 – 3.39

Gas consumption (G31)

m3/h

0.22 – 0.92

0.28 – 1.15

0.30 – 1.29

Pressure loss of the unit (CH)

mH2O

See par. 7.4

Electrical data

Mains voltage V

230

Safety class

IP IP44

Absorbed power: full load

W 80

Absorbed power: part load

W 40

Absorbed power: standby

W 2

Installation measurements and weight

Height

mm

590

650

710

Width

mm

450

Depth

mm

240

Weight

kg

30

33

36

FR : II2Esi3P
DE : II2ELL3P
BE : I2E(S)

* Time needed from beginning of draining in order to achieve a temperature increase of 40K to the hot water outlet of the device based on the

CW-hot water flow.

** Maximum CH power is set at the factory at 60% of the highest value (see par. 7.3 Setting CH power).

Rotex Heating Systems GmbH 51

10.1 Electrical diagram

A

Earth connection heat exchanger

F

Fuse (3.15 AT)

P1

CH pump

S5

Flow sensor

B

Spark cover

G

Gas valve + ignition unit

S1

Supply sensor

S7

CH water pressure sensor

C

Boiler controller

I

Ignition/ionization pin

S2

Return sensor

V

Fan

E

Earth lips boilerr controller

M

Mains voltage

S3

DHW sensor

Connecting:

Connector X4

24V=

Floor heating or group regulation valve. (3=L (brown), 5=switch (black), 6=N (blue))
(EK3WV1AA).

Three-way valve (3=L (brown), 5=switch (black), 6=N (blue))
(EK3WV1AA).

6 - 7
8 - 9

9 - 10
11 - 12

Connector X2

~

230V

7 - 8
3 – 5 - 6
3 – 5 - 6

Connector X5

5 -

2 - 4

CH pump (5= PWM signal (red), E=earth)
On/off room thermostat and/or frost thermostat (24Vdc or ± 125mA)

Outdoor sensor (12 k Ohm / 25°C)
Tank sensor or tank thermostat (if through connection 9 – 10 present, then remove it)
OpenTherm thermostat

Mains cable (2=L (brown), 4=N (blue), E=earth)

CH-pump (8=L (brown), 7=N (blue), E=earth)

Computer interface

Rotex Heating Systems GmbH 52

NTC 12k Ohm

T [°C]

R [ohm]

T [°C]

R [ohm]

T [°C]

R [ohm]

-15

76020

25

12000

65

2752

-10

58880

30

9805

70

2337

-5

45950

35

8055

75

1994 0 36130

40

6653

80

1707 5 28600

45

5522

85

1467

10

22800

50

4609

90

1266

15

18300

55

3863

95

1096

20

14770

60

3253

100

952

10.2 NTC resistances

Rotex Heating Systems GmbH 53

11 WARRANTY CONDITIONS

If the unit is due for replacement, it can usually be taken

The general warranty conditions of ROTEX Heating Systems GmbH apply to this product.

The warranty is void if it is determined that the faults,
damages, or undue wear are attributable to improper use or
inexpert treatment or inexpert repair, setting, installation or
maintenance, by non-certified installers, or that it was exposed to
substances with aggressive chemicals (incl. hair spray) and other
damaging substances.

The warranty also becomes void when pipes and couplings have
been applied in the installation which may cause oxygen diffusion,
or the defect is a consequence of lime scale (damaging to the unit
and installation). Surface damage as well as transport damage is
included under the warranty. The entitlement to warranty becomes
void if it cannot be proven that the CH boiler has been subjected to
maintenance by a certified installer at least once a year from the
commissioning date. The instructions for installation and use which
we provide for units must be followed in full.

Environment

back by your dealer, following consultation. Should this not
be possible, consult your council for the possibilities for
recycling or environmentally friendly processing of used
materials.

Various plastics and metals were used in the manufacturing
of the unit. Furthermore, the unit contains electrical
components which belong with electronic waste.

Use as intended

The unit, as described in this documentation is intended for heating
spaces via a central heating installation and/or the supply of hot water.
Any other usage falls outside the intended use of the unit. No liability
can be accepted on damage arising from incorrect use.

Rotex Heating Systems GmbH 54

 ROTEX · 4P374379 1C ;· 88553704 04/2015

ROTEX producten
verdeeld in Bel gi ë d oor :

Daikin Belux - Wavre
Avenue Franklin 1B
1300 Wavre
Tel. [phone]
Fax [phone]
e-mail [e-mail]

DAIKIN AIR CONDITIONING ITALY S.p.A.

Sede operativa

Via Milano, 6
20097 San Donato Milanese MI - Italy
Fon +39 02 51619.1
Fax [phone]
e-mail info@rotex ital i a.it
www.rotexitalia.it

Numero verd e RO TEX 800-886699

Dystrybutorem pro duktó w mark i
ROTEX w Polsce jest f irma:

Daikin Airc on di tioning Poland Sp. z o. o.
ul. Taśmowa 7
PL - 02-677 Warszawa
Fon [phone]
Fax [phone]
www.rotex.com.pl

DAIKIN AC SPAIN S.A.

C/Labastida, 2

28034 Madrid
Tel. [phone] y 91 3 87 32 23
Correo electró ni co: s at@ dai kin. es
www.daikin.es

Produkty ROTEX di stribuuje:

Daikin Airconditioning

Central Europ e - Czech
Republic spol. s r.o.
budova IBC - Pobřežní 3
CZ - 186 00 Praha 8
Fon [phone]
Fax [phone]
www.rotex-heating.cz

Daikin Airconditioning France SAS

ZA du Petit Nanterre
31, rue des H a utes Pâtur es
Le Narval - Bâtiment B
92737 Nanterre Cedex
Fon [phone]
Fax [phone]
www.daikin.fr

ROTEX Heating Systems GmbH

Langwiesenstraße 10
D-74363 Güglingen
www.rotex-heating.com