Rotex RKHWMX300C Installation And Maintenance Instructions Manual

Brand: Rotex

Model: RKHWMX300C

Category: Heat pumps

Type: Installation And Maintenance Instructions Manual

This manual is also suitable for

RKHWMX500C

For certified companies

ROTEX 

HPSU monobloc compact

Installation and maintenance

instructions

Solar storage tank with heating controller

For types

RKHWMX300C

RKHWMX500C

RKHWMXB300C

RKHWMXB500C

Edition 09/2017

CE - DECLARATION-OF-CONFORMITY

CE - KONFORMITÄTSERKLÄRUNG

CE - DECLARATION-DE-CONFORMITE

CE - CONFORMITEITSVERKLARING

CE - DECLARACION-DE-CONFORMIDAD

CE - DICHIARAZIONE-DI-CONFORMITA

CE - ǻHȁȍȈǾ ȈȊȂȂȅȇĭȍȈǾȈ

CE - DECLARAÇÃO-DE-CONFORMIDADE

CE - ɁȺəȼɅȿɇɂȿ-Ɉ-ɋɈɈɌȼȿɌɋɌȼɂɂ

CE - OVERENSSTEMMELSESERKLÆRING

CE - FÖRSÄKRAN-OM-ÖVERENSTÄMMELSE

CE - ERKLÆRING OM-SAMSVAR

CE - ILMOITUS-YHDENMUKAISUUDESTA

CE - PROHLÁENÍ-O-SHODċ

CE - IZJAVA-O-USKLAĈENOSTI

CE - MEGFELELėSÉGI-NYILATKOZAT

CE - DEKLARACJA-ZGODNOĝCI

CE - DECLARAğIE-DE-CONFORMITATE

CE - IZJAVA O SKLADNOSTI

CE - VASTAVUSDEKLARATSIOON

CE - ȾȿɄɅȺɊȺɐɂə-ɁȺ-௛ɔɈɌȼȿɌɋɌȼɂȿ

CE - ATITIKTIES-DEKLARACIJA

CE - ATBILSTƮBAS-DEKLARƖCIJA

CE - VYHLÁSENIE-ZHODY

CE - UYUMLULUK-BEYANI

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

instructions:

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

daß sie gemäß unseren Anweisungen eingesetzt werden:

sont conformes à la/aux norme(s) ou autre(s) document(s) normatif(s), pour autant qu'ils soient utilisés conformément à nos instructions:

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

onze instructies:

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

nuestras instrucciones:

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

nostre istruzioni:

İȓȞĮȚ ıȪȝĳȦȞĮ ȝİ ĲȠ(Į) ĮțȩȜȠȣșȠ(Į) ʌȡȩĲȣʌȠ(Į) Ȓ ȐȜȜȠ ȑȖȖȡĮĳȠ(Į) țĮȞȠȞȚıȝȫȞ, ȣʌȩ ĲȘȞ ʌȡȠȨʌȩșİıȘ ȩĲȚ ȤȡȘıȚȝȠʌȠȚȠȪȞĲĮȚ ıȪȝĳȦȞĮ

ȝİ ĲȚȢ ȠįȘȖȓİȢ ȝĮȢ:

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:

ɫɨɨɬɜɟɬɫɬɜɭɸɬ ɫɥɟɞɭɸɳɢɦ ɫɬɚɧɞɚɪɬɚɦ ɢɥɢ ɞɪɭɝɢɦ ɧɨɪɦɚɬɢɜɧɵɦ ɞɨɤɭɦɟɧɬɚɦ, ɩɪɢ ɭɫɥɨɜɢɢ ɢɯ ɢɫɩɨɥɶɡɨɜɚɧɢɹ ɫɨɝɥɚɫɧɨ ɧɚɲɢɦ

ɢɧɫɬɪɭɤɰɢɹɦ:

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

instrukser:

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

förutsättning att användning sker i överensstämmelse med våra instruktioner:

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

disse brukes i henhold til våre instrukser:

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

mukaisesti:

za pĜedpokladu, e jsou vyuívány v souladu s naimi pokyny, odpovídají následujícím normám nebo normativním dokumentĤm:

u skladu sa slijedeüim standardom(ima) ili drugim normativnim dokumentom(ima), uz uvjet da se oni koriste u skladu s naim uputama:

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

speániają wymogi nastĊpujących norm i innych dokumentów normalizacyjnych, pod warunkiem Īe uĪywane są zgodnie z naszymi

instrukcjami:

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

conformitate cu instrucĠiunile noastre:

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

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

ɫɴɨɬɜɟɬɫɬɜɚɬ ɧɚ ɫɥɟɞɧɢɬɟ ɫɬɚɧɞɚɪɬɢ ɢɥɢ ɞɪɭɝɢ ɧɨɪɦɚɬɢɜɧɢ ɞɨɤɭɦɟɧɬɢ, ɩɪɢ ɭɫɥɨɜɢɟ, ɱɟ ɫɟ ɢɡɩɨɥɡɜɚɬ ɫɴɝɥɚɫɧɨ ɧɚɲɢɬɟ

ɢɧɫɬɪɭɤɰɢɢ:

atitinka emiau nurodytus standartus ir (arba) kitus norminius dokumentus su sąlyga, kad yra naudojami pagal mǌsǐ nurodymus:

tad, ja lietoti atbilstoi raotƗja norƗdƯjumiem, atbilst sekojoiem standartiem un citiem normatƯviem dokumentiem:

sú v zhode s nasledovnou(ými) normou(ami) alebo iným(i) normatívnym(i) dokumentom(ami), za predpokladu, e sa pouívajú v súlade

s naim návodom:

ürünün, talimatlarmza göre kullanlmas koúuluyla aúa÷daki standartlar ve norm belirten belgelerle uyumludur:

Directives, as amended.

Direktiven, gemäß Änderung.

Directives, telles que modifiées.

Richtlijnen, zoals geamendeerd.

Directivas, según lo enmendado.

Direttive, come da modifica.

ȅįȘȖȚȫȞ, ȩʌȦȢ ȑȤȠȣȞ ĲȡȠʌȠʌȠȚȘșİȓ.

Directivas, conforme alteração em.

Ⱦɢɪɟɤɬɢɜ ɫɨ ɜɫɟɦɢ ɩɨɩɪɚɜɤɚɦɢ.

Direktiver, med senere ændringer.

Direktiv, med företagna ändringar.

Direktiver, med foretatte endringer.

Direktiivejä, sellaisina kuin ne ovat muutettuina.

v platném znČní.

Smjernice, kako je izmijenjeno.

irányelv(ek) és módosításaik rendelkezéseit

z póĨniejszymi poprawkami.

Directivelor, cu amendamentele respective.

Direktive z vsemi spremembami.

Direktiivid koos muudatustega.

Ⱦɢɪɟɤɬɢɜɢ, ɫ ɬɟɯɧɢɬɟ ɢɡɦɟɧɟɧɢɹ.

Direktyvose su papildymais.

DirektƯvƗs un to papildinƗjumos.

Smernice, v platnom znení.

Deۜiútirilmiú halleriyle Yönetmelikler.

following the provisions of:

gemäß den Vorschriften der:

conformément aux stipulations des:

overeenkomstig de bepalingen van:

siguiendo las disposiciones de:

secondo le prescrizioni per:

ȝİ ĲȒȡȘıȘ ĲȦȞ įȚĮĲȐȟİȦȞ ĲȦȞ:

de acordo com o previsto em:

ɜ ɫɨɨɬɜɟɬɫɬɜɢɢ ɫ ɩɨɥɨɠɟɧɢɹɦɢ:

under iagttagelse af bestemmelserne i:

enligt villkoren i:

gitt i henhold til bestemmelsene i:

noudattaen määräyksiä:

za dodrení ustanovení pĜedpisu:

prema odredbama:

követi a(z):

zgodnie z postanowieniami Dyrektyw:

în urma prevederilor:

ob upotevanju doloþb:

vastavalt nõuetele:

ɫɥɟɞɜɚɣɤɢ ɤɥɚɭɡɢɬɟ ɧɚ:

laikantis nuostatǐ, pateikiamǐ:

ievƝrojot prasƯbas, kas noteiktas:

odriavajúc ustanovenia:

bunun koúullarna uygun olarak:

527(;+HDWLQJ6\VWHPV*PE+

a

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

d

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

f

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

l

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

e

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

i

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

g

įȘȜȫȞİȚ ȝİ ĮʌȠțȜİȚıĲȚțȒ ĲȘȢ İȣșȪȞȘ ȩĲȚ Ƞ İȟȠʌȜȚıȝȩȢ ıĲȠȞ ȠʌȠȓȠ ĮȞĮĳȑȡİĲĮȚ Ș ʌĮȡȠȪıĮ įȒȜȦıȘ:

p

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

ɡɚɹɜɥɹɟɬ, ɢɫɤɥɸɱɢɬɟɥɶɧɨ ɩɨɞ ɫɜɨɸ ɨɬɜɟɬɫɬɜɟɧɧɨɫɬɶ, ɱɬɨ

ɨɛɨɪɭɞɨɜɚɧɢɟ,

ɤ ɤɨɬɨɪɨɦ

ɨɬɧɨɫɢɬɫɹ ɧɚɫɬɨɹɳɟɟ ɡɚɹɜɥɟɧɢɟ:

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

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

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

ilmoittaa yksinomaan omalla vastuullaan, että tämän ilmoituksen tarkoittamat laitteet:

prohlauje ve své plné odpovČdnosti, e zaĜízení, k nČmu se toto prohláení vztahuje:

izjavljuje pod iskljuþivo vlastitom odgovornoüu da oprema na koju se ova izjava odnosi:

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

deklaruje na wáasną i wyáączną odpowiedzialnoĞü, Īe urządzenia, których ta deklaracja dotyczy:

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

z vso odgovornostjo izjavlja, da je oprema naprav, na katero se izjava nanaa:

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

ɞɟɤɥɚɪɢɪɚ ɧɚ ɫɜɨɹ ɨɬɝɨɜɨɪɧɨɫɬ, ɱɟ ɨɛɨɪɭɞɜɚɧɟɬɨ, ɡɚ ɤɨeɬɨ ɫɟ ɨɬɧɚɫɹ ɬɚɡɢ ɞɟɤɥɚɪɚɰɢɹ:

visika savo atsakomybe skelbia, kad Ƴranga, kuriai taikoma i deklaracija:

ar pilnu atbildƯbu apliecina, ka tƗlƗk aprakstƯtƗs iekƗrtas, uz kurƗm attiecas Ư deklarƗcija:

vyhlasuje na vlastnú zodpovednosĢ, e zariadenie, na ktoré sa vzĢahuje toto vyhlásenie:

tamamen kendi sorumluluۜunda olmak üzere bu bildirinin ilgili olduۜu donanmnn aúaۜdaki gibi olduۜunu beyan eder:

EN60335-2-40,

EN55014-1: 2006 (+A1:200$),

EN55014-2: 1997 (+A1: 2001 +A2: 200),

EN61000-3-2: 20,

EN61000-3-3: 20,

Low Voltage 20/5/E8

Electromagnetic Compatibility 204//E8

(FRGHVLJQ(&

5.+:0;&$5.+:0;%&$5.+:0;&$5.+:0;%&$

 

(1

(1

(1

&RPPLVVLRQUHJXODWLRQ

&RPPLVVLRQUHJXODWLRQ

*HRUJ%OPHO

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List of contents

FA ROTEX HPSU monobloc compact • 09/2017 3

1 General Information . . . . . . . . . . . . . . . . . . . .4

1.1 Refer to the manual . . . . . . . . . . . . . . . . . . . . . . .4

1.2 Warranty conditions . . . . . . . . . . . . . . . . . . . . . . .4

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1 Warnings and symbols . . . . . . . . . . . . . . . . . . . . .5

2.1.1 Meaning of the warnings . . . . . . . . . . . . . . . . . . . . . .5

2.1.2 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1.3 Order number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.1.4 Handling instructions . . . . . . . . . . . . . . . . . . . . . . . . .5

2.2 Avoiding danger . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.3 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2.4 Instructions for operating safety . . . . . . . . . . . . . .6

2.4.1 Before working on the hydraulic system . . . . . . . . . .6

2.4.2 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . .6

2.4.3 Site of installation . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.4.4 Heating system and sanitary connection. . . . . . . . . .7

2.4.5 Requirements for the heating water . . . . . . . . . . . . .7

2.4.6 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.4.7 Instruct the owner . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3 Product description . . . . . . . . . . . . . . . . . . . .8

3.1 Design and components . . . . . . . . . . . . . . . . . . . .8

3.1.1 Exterior of the device and interior structure

RKHWMX(B)300C. . . . . . . . . . . . . . . . . . . . . . . . . . .8

3.1.2 Exterior of the device and interior structure

RKHWMX(B)500C. . . . . . . . . . . . . . . . . . . . . . . . . . .9

3.1.3 Upper side of the device . . . . . . . . . . . . . . . . . . . . .10

4 Set-up and installation . . . . . . . . . . . . . . . . .12

4.1 Dimensions and connections . . . . . . . . . . . . . . .13

4.1.1 RKHWMX(B)300C. . . . . . . . . . . . . . . . . . . . . . . . . .13

4.1.2 RKHWMX(B)500C. . . . . . . . . . . . . . . . . . . . . . . . . .14

4.1.3 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . .15

4.2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

4.3 Removing the cover and thermal insulation . . . .17

4.4 Water connection . . . . . . . . . . . . . . . . . . . . . . . .18

4.4.1 Aligning the connections of the heating supply and

return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

4.4.2 Connecting hydraulic lines . . . . . . . . . . . . . . . . . . .20

4.4.3 Installation of the DB connection kit ( 14 15 90) . . .21

4.4.4 Installation of the P connection kit ( 14 15 89) . . . .21

4.5 Electrical connection . . . . . . . . . . . . . . . . . . . . . .22

4.5.1 ROTEX HPSU monobloc compact overall c

onnection diagram. . . . . . . . . . . . . . . . . . . . . . . . . .23

4.5.2 Position of the printed circuit boards . . . . . . . . . . . .24

4.5.3 RTX-EHS printed circuit board connection 

diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

4.5.4 RoCon BM2C printed circuit board connection

diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.5.5 Mains connection 

ROTEX HPSU monobloc compact . . . . . . . . . . . . .25

4.5.6 Opening the controller housing and establishing

electrical connections . . . . . . . . . . . . . . . . . . . . . . .26

4.5.7 Connecting the heat pump outdoor unit . . . . . . . . .26

4.5.8 Connecting an external switching contact . . . . . . . .26

4.5.9 External requirement request (EBA) . . . . . . . . . . . .27

4.5.10 Connecting an electric ROTEX backup heater 

(BUxx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

4.5.11 Connecting an external heat generator . . . . . . . . . .29

4.5.12 Connecting a ROTEX room thermostat. . . . . . . . . .30

4.5.13 Connecting optional ROTEX RoCon system

components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

4.5.14 Connecting a ROTEX HP convector . . . . . . . . . . . .31

4.5.15 Connecting switching contacts (AUX outputs) . . . .31

4.5.16 Off-peak mains connection (HT/NT) . . . . . . . . . . . .32

4.5.17 Connecting an intelligent controller 

(Smart Grid - SG). . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.5.18 Symbols and key names for connection and wiring

diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.6 Filling the system on the water side. . . . . . . . . . 34

4.6.1 Checking the water quality and adjusting the 

pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.6.2 Filling the hot water heat exchanger . . . . . . . . . . . 34

4.6.3 Filling the storage tank . . . . . . . . . . . . . . . . . . . . . 34

4.6.4 Filling the heating system . . . . . . . . . . . . . . . . . . . 34

5 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5.1 Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1.2 Starting the device. . . . . . . . . . . . . . . . . . . . . . . . . 35

5.1.3 Setting commissioning parameters . . . . . . . . . . . . 36

5.1.4 Bleeding the hydraulic system. . . . . . . . . . . . . . . . 36

5.1.5 Checking the minimum flow. . . . . . . . . . . . . . . . . . 37

5.1.6 Setting the parameter Screed Program

(only when required) . . . . . . . . . . . . . . . . . . . . . . . 37

5.2 Re-commissioning . . . . . . . . . . . . . . . . . . . . . . . 38

5.2.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.2.2 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6 Taking out of operation . . . . . . . . . . . . . . . . 39

6.1 Temporary shutdown . . . . . . . . . . . . . . . . . . . . . 39

6.1.1 Draining the storage tank . . . . . . . . . . . . . . . . . . . 39

6.1.2 Draining the heating circuit and hot water circuit. . 40

6.2 Final shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . 41

7 Service and maintenance. . . . . . . . . . . . . . . 42

7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

7.2 Activities to be performed annually . . . . . . . . . . 42

7.3 Filling, topping up the storage tank . . . . . . . . . . 43

7.4 Filling, topping up the heating system . . . . . . . . 44

7.4.1 Protecting the water circuit against freezing . . . . . 44

7.4.2 Filling, topping up steps. . . . . . . . . . . . . . . . . . . . . 45

8 Errors, malfunctions and messages. . . . . . 47

8.1 Recognising errors, correcting malfunctions . . . 47

8.1.1 Current error display . . . . . . . . . . . . . . . . . . . . . . . 47

8.1.2 Reading out the protocol . . . . . . . . . . . . . . . . . . . . 47

8.1.3 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.2 Malfunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

8.3 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

8.4 Control and configuration of DIP switches . . . . . 60

8.5 Emergency operation. . . . . . . . . . . . . . . . . . . . . 60

9 Hydraulic system connection . . . . . . . . . . .61

10 Technical data. . . . . . . . . . . . . . . . . . . . . . . .63

10.1 Equipment data . . . . . . . . . . . . . . . . . . . . . . . . . 63

10.1.1 RKHWMX(B)300C. . . . . . . . . . . . . . . . . . . . . . . . . 63

10.1.2 RKHWMX(B)500C. . . . . . . . . . . . . . . . . . . . . . . . . 65

10.2 Characteristic lines. . . . . . . . . . . . . . . . . . . . . . . 67

10.2.1 Sensor characteristic lines. . . . . . . . . . . . . . . . . . . 67

10.3 Tightening torque . . . . . . . . . . . . . . . . . . . . . . . 67

10.4 Circuit diagram 

ROTEX HPSU monobloc compact . . . . . . . . . . 68

11 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

12 List of keywords . . . . . . . . . . . . . . . . . . . . . . 71

4FA ROTEX HPSU monobloc compact • 09/2017

1 x General Information

1 General Information

1.1 Refer to the manual

Original Operating Instructions

These instructions are a >> translation of the original

version << in your language.

Please read this manual carefully and thoroughly before pro-

ceeding with the installation or modification of the heating sys-

tem.

Target Group

These instructions are aimed at people who are authorised and

who have successfully completed a qualifying technical or skilled

manual training program for the particular work to be carried out

and who have participated in professional development seminars

recognised by the appropriate responsible authority. This, in par-

ticular, includes heating specialists and climate control techni-

cians who have experience, as a result of their technical training

and their knowledge of the subject, of proper and appropriate

installation and maintenance of heating, climate control and cool-

ing installations and heat pumps.

This manual provides all the necessary information for installa-

tion, start-up and maintenance, as well as basic information on

operation and settings. All parameters needed for trouble-free

operation have been configured at the factory. Please see the

attached documents for a detailed description of operation and

control.

Relevant documents

– ROTEX HPSU monobloc compact:

– Operating instructions for the user/owner

– Commissioning checklist

– the operating manual for the user/owner

– RoCon mb controller operating instructions

– Outdoor unit for ROTEX HPSU monobloc compact: the

respective installation and operating instructions.

– On connection of a ROTEX solar system: the respective

installation and operating instructions.

– On connection of a ROTEX HP convector: the respective

installation and operating instructions.

– On connection of a control component available as an acces-

sory (room station, mixer module, etc.): the associated instal-

lation and operating instructions.

The guides are included in the scope of supply for the individual

units.

1.2 Warranty conditions

The legal guarantee conditions fundamentally apply. Our war-

ranty conditions beyond that can be found online on your sales

presentative's webpage.

2 x Safety

FA ROTEX HPSU monobloc compact • 09/2017 5

2Safety

2.1 Warnings and symbols

2.1.1 Meaning of the warnings

Warnings in this manual are classified according

into their severity and probability of occurrence.

Special warning signs

Some types of danger are represented by

special symbols:

2.1.2 Validity

Some information in this manual has limited va-

lidity. The validity is highlighted by a symbol.

2.1.3 Order number

References to order numbers can be recognised

from the goods symbol .

2.1.4 Handling instructions

ƔHandling instructions are shown as a list.

Actions for which the sequential order must be

maintained are numbered.

2.2 Avoiding danger

The ROTEX HPSU monobloc compact is built

according to the state-of-the-art and the recog-

nised technical rules. However, improper use

may result in serious physical injuries or death,

as well as property damage.

To avoid hazards, only install and operate the

ROTEX HPSU monobloc compact:

– as stipulated and in perfect condition,

– with an awareness of safety and the hazards

involved.

This assumes knowledge and use of the con-

tents of this manual, of the relevant accident pre-

vention regulations as well as the recognised

safety-related and occupational health rules.

DANGER!

Draws attention to imminent danger.

Disregarding this warning can lead to serious

injury or death.

WARNING!

Indicates a potentially dangerous situation.

Disregarding this warning may result in serious

physical injury or death.

CAUTION!

Indicates a situation which may cause possible

damage.

Disregarding this warning may cause damage

to property and the environment.

This symbol identifies user tips and par-

ticularly useful information, but not

warnings or hazards.

Electric current

Risk of burning or scalding

Risk of environmental damage

Danger of local freezing up

Health impairing or irritant materials

Prescribed temperature for continuous use

Danger of explosion

Heat pump outdoor unit

Heat pump interior unit HPSU monobloc

compact

HP convector

Observe specified tightening torque (see

chap. 10.3 "Tightening torque")

Only applicable to the unpressurised solar

system (DrainBack).

Only applicable for the pressurised solar

system.

ÎResults of actions are identified with an

arrow.

Entry into a setting procedure

Exit from a setting procedure

6FA ROTEX HPSU monobloc compact • 09/2017

2 x Safety

2.3 Intended use

The ROTEX HPSU monobloc compact must

only be used to prepare hot water, as a room

heating system and as a room cooling system.

The ROTEX HPSU monobloc compact must

only be installed, connected and operated ac-

cording to the data in these instructions.

Only the use of a suitable outdoor unit approved

by ROTEX is permitted. The following combina-

tions are permissible in this respect:

* Not all the equipment mentioned here is offered in some countries because of

the various different country-specific connection conditions.

Tab. 2-1 Permissible combinations of ROTEX HPSU monobloc

compact solar storage tanks with heating controller and

ROTEX HPSU monobloc compact outdoor units

Any other use outside the intended use is con-

sidered as improper. The operator alone shall

bear responsibility for any resulting damage.

Intended use also includes compliance with the

maintenance and service conditions. Re-

placement parts must at least satisfy the tech-

nical requirements defined by the manufacturer.

This is the case, for example, with original spare

parts.

2.4 Instructions for operating safety

2.4.1 Before working on the hydraulic system

ƔWork on the ROTEX HPSU monobloc

compact (such as e.g. installation, connection

and initial commissioning) must only be

carried out by persons who are authorised,

who have successfully completed qualifying

technical or vocational training for the

respective activity and who have taken part in

advanced training sessions recognised by the

relevant responsible authority. This, in

particular, includes heating specialists and

climate control technicians who have

experience, as a result of their technical

training and their knowledge of the subject, of

proper and appropriate installation and

maintenance of heating, climate control and

cooling installations and heat pumps.

ƔSwitch off the external main switch during all

work on the ROTEX HPSU monobloc

compact, and secure it to prevent uninten-

tional activation.

ƔSeals must not be damaged or removed.

ƔMake sure that the safety valves comply with

the requirements of EN 12828 when

connecting on the heating side, and with the

requirements of EN 12897 when connecting

on the domestic water side.

ƔOnly original ROTEX replacement parts may

be used.

ƔWhen working on the hydraulics, you must

first drain the water or release the pressure

using the internal KFE valve. Otherwise hot

water can jet out under pressure and result in

injury.

2.4.2 Electrical installation

ƔElectrical installation must only be carried out

by specialist personnel with electrical

engineering qualifications and subject to

compliance with the valid electrical

engineering guidelines as well as the regula-

tions of the responsible utility company (EVU).

ƔCompare the mains voltage (~230 V, 50 Hz or

~400 V, 50 Hz) indicated on the type plate

with the supply voltage before connecting to

the mains.

ƔBefore beginning work on live parts,

disconnect all of the systems circuits from the

power supply (switch off main switch,

disconnect fuse) and secure against uninten-

tional restart.

ƔEquipment covers and service panels must be

replaced as soon as the work is completed.

WARNING!

This equipment must only be used by children

aged 8 and above and by persons with re-

stricted physical, sensory or mental capabilities

or with a lack of experience and knowledge, if

they are under supervision or if they have been

instructed in the safe use of the equipment and

understand the dangers arising therefrom.

Children must not play with the equipment.

Cleaning or user maintenance must not be

carried out by children without supervision.

Indoor unit Outdoor unit

RKHWMX300C

RKHWMX500C

RKHWMXB300C

RKHWMXB500C

RBLQ05C2V3

RBLQ07C2V3

2 x Safety

FA ROTEX HPSU monobloc compact • 09/2017 7

2.4.3 Site of installation

For safe and fault-free operation, the installation

location of the ROTEX HPSU monobloc compact

must meet certain criteria. Information on this

can be found in chap. 4.2.

Information on the installation site of other com-

ponents can be found in the associated docu-

mentation supplied with them.

2.4.4 Heating system and sanitary

connection

ƔCreate a heating system according to the

safety requirements of EN 12828.

ƔWith a sanitary connection you must comply

with

– EN 1717 – Protection against pollution of

potable water installations and general

requirements of devices to prevent pollu-

tion by backflow

– EN 806 – Specifications for installations

inside buildings conveying water for human

consumption

– and, in addition, the country-specific legal

regulations.

The connection of a solar installation, an electric

heating rod or an alternative heat generator may

cause the storage temperature to exceed 60 °C.

ƔScalding protection (e.g. VTA32 15 60 15

+ Screw set 1" 15 60 16) must therefore

be fitted during installation.

If the ROTEX HPSU monobloc compact is

connected to a heating system with steel pipes,

radiators or non-diffusion-proof floor heating

pipes, sludge and swarf can enter the hot water

storage tank and cause blockages, local

overheating or corrosion damage.

ƔTo prevent possible damage, fit a dirt filter or

sludge separator into the heating return flow

of the system.

–SAS 1 ( 15 60 21)

ƔThe dirt filter must be cleaned at regular

intervals.

2.4.5 Requirements for the heating water

Observe the relevant regulations of technology

to prevent creation of corrosion products and de-

posits.

Minimum requirements regarding the quality

of filling and supplementary water:

– Water hardness (calcium and magnesium,

calculated as calcium carbonate):

 3 mmol/l

– Conductivity:  1500 (ideal:  100) ȝS/cm

– Chloride:  250 mg/l

– Sulphate:  250 mg/l

– pH-values (heating water): 6.5 - 8.5

Using filling water and top-up water which does

not meet the stated quality requirements can

cause a considerably reduced service life of the

equipment. The responsibility for this lies solely

with the operator.

2.4.6 Operation

The ROTEX HPSU monobloc compact:

ƔDo not operate until all installation and

connection work is completed.

ƔOnly operate with a completely full storage

tank (Level indicator) and heating circuit.

ƔOperate at a maximum pressure of 3 bar.

ƔOnly connect with a pressure reducer on the

external water supply (supply line).

Ɣonly operate if the protective cover is installed.

The specified servicing intervals should be

adhered to and inspection work must be car-

ried out.

2.4.7 Instruct the owner

ƔBefore you hand over the ROTEX HPSU

monobloc compact, explain to the user how to

operate and check the system.

ƔHand over the technical documentation (this

document and all supporting documents) to

the user and advise him that these documents

must be made available at all times and be

stored in the immediate vicinity of the unit.

ƔDocument the handover by filling out the

installation and instruction forms together with

the owner and sign them.

8FA ROTEX HPSU monobloc compact • 09/2017

3 x Product description

3 Product description

3.1 Design and components

3.1.1 Exterior of the device and interior structure RKHWMX(B)300C

Fig. 3-1 RKHWMX(B)300C design and components (exterior view and interior structure)



Key names, see tab. 3-1

30 1234

3UV

DHW

RoCon B1

3UVB1

3UV DHW

23 4

3132

3UVB1

24 / 11

DHW

32 M

3UV

DHW 3UVB1

MAG

V,BH

3 x Product description

FA ROTEX HPSU monobloc compact • 09/2017 9

3.1.2 Exterior of the device and interior structure RKHWMX(B)500C

Fig. 3-2 RKHWMX(B)500C design and components (exterior view and interior structure)



Key names, see tab. 3-1

3UV

DHW

RoCon B1

3UVB1

12 330

23 2928

DHW

53132 X

24 / 11

3UV DHW

3UVB1

32 M

3UV

DHW 3UVB1

MAG

V,BH

10 FA ROTEX HPSU monobloc compact • 09/2017

3 x Product description

3.1.3 Upper side of the device

Fig. 3-3 RKHWMX(300/500)C design and components



(upper side of the device)

33 33

(34)

3UV DHW 3UVB1

1 3UV DHWDS4023 35 3830 SV

39 19

3UV DHW

tV,BH

33231

3 x Product description

FA ROTEX HPSU monobloc compact • 09/2017 11

Tab. 3-1 Legend for fig. 3-1 to fig. 3-3

1 Solar feed or connection for further

heat source (1" IG)

2 Cold water connection (1" AG)

3 Hot water (1" AG)

4 Heating feed (1" AG)*

5 Heating return flow (1" AG)*

7a Recommended accessories:



non-return valves (2x), 16 50 70

8 Automatic bleeder

9 Storage tank (double walled jacket made

of polypropylene with PUR hard foam heat

insulation)

10 Filling and draining connection or



solar return flow connection

11 Mount for solar controller or handle

12 Heat exchanger (stainless steel) for do-

mestic hot water heating

13 Heat exchanger (stainless steel) for stor-

age tank charging and heating support

14 Heat exchanger (stainless steel) for pres-

surised solar system charging (type …(B)

only)

15 Connection for optional electric backup

heater BUxx (R 1½" IG)

16 Solar - inflow layering pipe

17 Fill level indicator (storage tank water)

18 Optional: electric backup heater



(BUxx)

19 Sensor immersion sleeve for storage tank

temperature sensor tDHW

20 Pressure-free storage tank water

21 Solar zone

22 Hot water zone

23 Safety overflow connection

24 Mount for handle

25 Rating plate

26 Cover

27 Solar return flow

28 Solar feed (3/4" IG + 1" AG)



(type …(B) only)

29 Solar return flow (3/4" IG + 1" AG)



(type …(B) only)

30 Discharge fitting cover

31 Outdoor unit water inlet connection

(1" AG)*

32 Outdoor unit water outlet connection

(1" IG)*

33 Vent valve (manual)

34 Ball cock (heating circuit)*

35 Combined filling and draining valve (heat-

ing circuit)

38 Diaphragm expansion vessel connection

39 Controller housing with electr. connector

block

40 Holding burls for protective cover

41 RPS4



Optional: ROTEX solar control and

pump unit

3UVB1



3-way switch valve (internal heat genera-

tor circuit)

3UV DHW



3-way switch valve (hot water / heating)

DS Pressure sensor

MAG



Diaphragm expansion vessel (optional)

SV Safety pressure relief valve (heating cir-

cuit)

tDHW



Storage tank temperature sensor

tV, BH



Backup heater feed temperature sensor

RoCon B1



ROTEX HPSU monobloc compact control-

ler control panel

Safety devices

Observe tightening torque!

AG External thread

IG Internal thread

* Ball cock (1" IG) is supplied.

12 FA ROTEX HPSU monobloc compact • 09/2017

4 x Set-up and installation

4 Set-up and installation

WARNING!

Cooling systems (heating pumps), climate control systems and heating devices that have been set

up and installed incorrectly can both endanger life and health of people and be impaired in their func-

tion.

Work on the ROTEX HPSU monobloc compact (such as e.g. installation, repair, connection and ini-

tial commissioning) must only be carried out by persons who are authorised, who have successfully

completed qualifying technical or vocational training for the respective activity and who have

taken part in advanced training sessions recognised by the relevant responsible authority. This

especially includes heating specialists and specialist electricians, who have experience in the

proper installation and maintenance of heating systems due to their technical training and special-

ist knowledge.

4 x Set-up and installation

FA ROTEX HPSU monobloc compact • 09/2017 13

4.1 Dimensions and connections

4.1.1 RKHWMX(B)300C

1 Solar inflow

2 Cold water

3 Hot water

4 Heating flow

5 Heating return flow

6 Outdoor unit water outlet connection

7 Outdoor unit water inlet connection

8 Solar feed (type …(B) only)

9 Solar return (type …(B) only)

A Front

BRear

Fig. 4-1 RKHWMX(B)300C connections and dimensions

14 FA ROTEX HPSU monobloc compact • 09/2017

4 x Set-up and installation

4.1.2 RKHWMX(B)500C

1 Solar inflow

2Cold water

3 Hot water

4 Heating flow

5 Heating return flow

6 Outdoor unit water outlet connection

7 Outdoor unit water inlet connection

8 Solar feed (type …(B) only)

9 Solar return (type …(B) only)

AFront

B Rear

Fig. 4-2 RKHWMX(B)500C connections and dimensions

4 x Set-up and installation

FA ROTEX HPSU monobloc compact • 09/2017 15

4.1.3 Scope of delivery

– ROTEX HPSU monobloc compact

– Bag of accessories (see fig. 4-3)

4.2 Installation

A Handles (only required for

transport)

B Cover screen

C Hose connecting piece for

safety overflow

D Spanner

EBall cock

F Flat seal

GO-ring

H Cable tie

I Plug bracket

J Venting tube

K Cover drain hose

Fig. 4-3 Contents of bag of accessories

CAUTION!

ƔOnly install the ROTEX HPSU monobloc

compact if a sufficient ground carrying

capacity of 1050 kg/m² plus safety margin

is ensured. The ground must be flat and

level.

ƔOutdoor installation is not permissible.

ƔInstallation in an explosion-risk environment

is not permissible.

ƔThe electronic controller must never be

exposed to the effects of weather.

ƔThe storage tank may not be exposed to

continuous direct sunlight, as the UV radi-

ation and the effects of the weather will

damage the plastic.

ƔThe ROTEX HPSU monobloc compact must

be installed protected from frost.

ƔMake sure that the supply company does

not provide corrosive domestic water.

– Suitable water treatment may be

required.

WARNING!

The plastic wall of the storage tank of the

ROTEX HPSU monobloc compact can melt

under the effects of external heat (>80 °C) and,

in the extreme case, can catch fire.

ƔOnly install the ROTEX HPSU monobloc

compact with a minimum distance of 1 m to

other heat sources (>80 °C) (e.g. electrical

heater, oil heater, chimney) and the material

to be combusted.

16 FA ROTEX HPSU monobloc compact • 09/2017

4 x Set-up and installation

ƔRemove packing and dispose of it in an environment-friendly

manner.

ƔPull off the cover screens (fig. 4-4, item B) from the storage

tank and unscrew the threaded fittings (fig. 4-4, item F) from

the openings at which the handles are to be fitted (fig. 3-1 to

fig. 3-2, item 24).

ƔScrew the handles (fig. 4-4, item A) into the now uncovered

threaded holes.

ƔInstall the ROTEX HPSU monobloc compact at the installa-

tion site.

– Recommended clearances (fig. 4-5):

From the wall: (s1)  100 mm, (s2)  500 mm.

From the ceiling (X):  1200 mm, at least 480 mm.

– Transport the ROTEX HPSU monobloc compact using

the handles.

– When setting up the unit in a cabinet, behind panels or in

other restricted conditions, sufficient ventilation (e.g.,

using ventilation gratings) must be ensured.

ƔIf required, install the optional backup heater (BUxx) in the

ROTEX HPSU monobloc compact (fig. 4-5).

Observe the installation and operating instructions enclosed

with the accessories ( tightening torque, see chap. 10.3).

CAUTION!

If the ROTEX HPSU monobloc compact is not

installed a sufficient distance below the flat

solar panels (the top edge of the storage tank is

higher than the bottom edge of the solar pan-

els), the unpressurised solar system in the out-

door area will not be able to drain completely.

ƔInstall the ROTEX HPSU monobloc compact

sufficiently low at the flat solar panels

(observe minimum gradient in the solar con-

nection lines) in the case of a DrainBack solar

connection.

A Handle

B Cover screen

F Threaded piece

Fig. 4-4 Installing the handles

4 x Set-up and installation

FA ROTEX HPSU monobloc compact • 09/2017 17

4.3 Removing the cover and thermal insulation

ƔRaise the cover at the rear and remove forwards.

Fig. 4-5 Installation (shown on RKHWMX(B)500C with installation of

the optional backup heater)

1200 mm

ኢ

2. 3. 4.

>80°C

<1000 mm

max. 10 Nm

≥ 2050

Fig. 4-6 Remove the protective cover

If the installation conditions require the hydraulic con-

nection directly upwards, the cover can be cut out along

the broken line.

Fig. 4-7 Producing the cover cut-out

Fig. 4-8 ROTEX HPSU monobloc compact without protective cover

18 FA ROTEX HPSU monobloc compact • 09/2017

4 x Set-up and installation

ƔRemove the thermal insulation in the following order:

– Pull the side insulating element off horizontally (fig. 4-9,

item A).

– Pull the rear insulating element off horizontally (fig. 4-9,

item B).

– Pull the front insulating element off horizontally (fig. 4-9,

item C).

ƔAs required: Remove the bottom thermal insulation in the fol-

lowing order:

– Pull the side insulating element off vertically (fig. 4-10,

item A).

– Pull the rear insulating element off vertically (fig. 4-10,

item B).

4.4 Water connection

CAUTION!

The thermal insulation (fig. 4-8, item A) consists

of pressure-sensitive EPP moulded parts that

can be easily damaged if not handled correctly.

ƔOnly remove the thermal insulation in the

order stated below and in the stated direc-

tions.

ƔDo not use force.

ƔDo not use tools.

Fig. 4-9 Removing the top thermal insulation

Fig. 4-10 Removing the bottom thermal insulation

The thermal insulation is installed in reverse order.

CAUTION!

If the ROTEX HPSU monobloc compact is con-

nected to a heating system with steel pipes,

radiators or non-diffusion-proof floor heating

pipes, slurry and swarf could enter the hot water

storage tank and cause blockages, local over-

heating or corrosion.

ƔFlush the feed pipes before filling the heat

exchanger.

ƔRinse out the heat distribution network (in the

existing heating system).

ƔInstall a dirt filter or sludge separator in the

heating return flow (see chap. 2.4.4).

4 x Set-up and installation

FA ROTEX HPSU monobloc compact • 09/2017 19

ƔObserve the stipulations of EN 806 and DIN 1988 for domes-

tic water pipes.

ƔInstall the ROTEX HPSU monobloc compact close to the

withdrawal point to dispense with the need for a circulation

line. If a circulation line is mandatory, it must be installed

according to the schematic diagrams in chap. 9 "Hydraulic

system connection".

4.4.1 Aligning the connections of the heating supply

and return

The connections of the heating supply and return can be directed

upwards or backwards in order to adapt it optimally to the struc-

tural conditions of the installation site.

The device is supplied with upwards aligned connections as

standard. The following conversion steps are required in order to

direct the connections to the rear out of the device:

ƔRemove the protective cover and top thermal insulation (see

chap. 4.3).

ƔPull the two plug brackets off the connection couplings

(fig. 4-11, item C).

ƔPull off the two connection couplings (fig. 4-11, item B).

ƔRemove the retaining plate (fig. 4-11, item A).

ƔPull off the sealing plug plug bracket (fig. 4-11, item D).

ƔPull out the sealing plug (fig. 4-11, item E).

ƔTurn the elbow (fig. 4-11, item H) 90° to the rear.

ƔPull the plug bracket off the manifold (fig. 4-11, item G).

ƔCarefully pull the manifold (fig. 4-11, item F) so far backwards

out of its horizontal mounting that the retaining plate

(fig. 4-12, item A) can be pushed vertically in between.

CAUTION!

If the ROTEX HPSU monobloc compact is con-

nected to a cold water supply line in which steel

pipes are used, swarf can enter the stainless

steel corrugated tube heat exchanger and

remain there. This can lead to contact corro-

sion damage and subsequently to leakage.

ƔFlush the feed pipes before filling the heat

exchanger.

ƔInstall a dirt filter in the cold water supply (see

chap. 2.4.4).

RKHWMXB300C AND

RKHWMXB500C ONLY

CAUTION!

If the heat exchanger for pressurised solar

system charging (fig. 4-1 / fig. 4-2, items 8+9)

is connected to an external heater (e.g. wood-

burning boiler), the ROTEX HPSU monobloc

compact can be damaged or destroyed due to

an excessively high feed temperature at these

connections.

ƔThe inflow temperature of the external heat-

ing unit should be limited to max. 95 °C.

In accordance with EN 12828 a safety valve that limits

the maximum permissible operating pressure in the

heating system must be installed on or in the immediate

vicinity of the heat generator. There may not be any

hydraulic blocking elements between the heat generator and the

safety valve.

Any steam or heating water which may escape must be drained

by a suitable blow-off line with constant gradient in a frost-pro-

tected, safe and observable manner.

A diaphragm expansion vessel suitably sized and preset for the

heating system must be connected to the ROTEX HPSU mono-

bloc compact. There may not be any hydraulic blocking ele-

ments between the heat generator and the diaphragm expan-

sion vessel.

ROTEX recommends installing a mechanical pressure gauge

for filling the heating system.

Fig. 4-11 Aligning the heating supply and return upwards

CAUTION!

When working on the hydraulics, pay attention

to the installation position of the O-rings to avoid

damaging them and causing leaks.

ƔAlways place O-rings on the part to be

inserted after a plug connection has been

removed or before it is installed.

ƔConnection of heating lines by plug connec-

tion must be without tension. Establish suita-

ble tension relief particularly for connection

with flexible lines (not breathable!).

20 FA ROTEX HPSU monobloc compact • 09/2017

4 x Set-up and installation

ƔSlide the retaining plate between the manifold and its horizon-

tal mounting and insert the manifold (fig. 4-12, item F) back

into its mounting through the middle hole of the retaining

plate.

ƔSecure the manifold with plug bracket (fig. 4-12, item G) in its

mounting again.

ƔInsert the two connection couplings (fig. 4-12, item B) into the

lateral mountings through the retaining plate.

ƔSecure the two connection couplings with plug brackets

(fig. 4-12, item C) in their mountings.

ƔInsert the sealing plug (fig. 4-12, item E) into the upper

mounting.

ƔSecure the sealing plug with plug bracket (fig. 4-12, item D).

ƔCut out side openings in the thermal insulation (fig. 4-13,

item A) using a suitable tool.

4.4.2 Connecting hydraulic lines

Prerequisite: optional accessories (e.g. solar, backup heater) are

mounted on the ROTEX HPSU monobloc compact as specified

in the enclosed instructions.

ƔCheck cold water pressure (maximum 6 bar).

– If a higher pressure is present in the domestic water pipe,

a pressure reducer will need to be installed.

ƔEstablish hydraulic connections on the ROTEX HPSU mono-

bloc compact.

– Refer to fig. 4-1 / fig. 4-2 and tab. 3-1 for the position and

dimensions of the heater connections and the outdoor unit

connections.

– Pay attention to the stipulated tightening torque (see

chap. 10.3 "Tightening torque").

– Install the line so that the sound insulation hood can be

positioned easily after installation.

– Connect the water for filling or refilling the heating system

as per EN 1717 so that contamination of the drinking

water due to return flow is reliably prevented.

ƔConnect the drain line to the safety overpressure valve and

diaphragm expansion vessel as per EN 12828.

– Check the seat of the drain hose on the pressure relief

valve.

– If necessary, connect and install a separate hose.

ƔCarefully insulate pipework against heat loss and to avoid

condensation (insulation thickness at least 20 mm).

–Water shortage protection: the controller's pressure and

temperature monitoring function shuts off the ROTEX HPSU

monobloc compact reliably if there is a shortage of water. No

additional water shortage protection is needed in the con-

struction.

–Damage due to deposits and corrosion: observe the rele-

vant technical rules to avoid corrosion products and deposits.

Minimum requirements regarding the quality of filling and sup-

plementary water:

– Water hardness (calcium and magnesium, calculated as

calcium carbonate):  3 mmol/l

– Conductivity:  1500 (ideal:  100) ȝS/cm

– Chloride:  250 mg/l

– Sulphate:  250 mg/l

– pH-values (heating water): 6.5 - 8.5

Measures for desalination, softening, hardness stabilisation or

other suitable conditioning measures are necessary to adhere to

the required water quality if the filling and top-up water have a

high overall hardness or other properties that deviate from the

minimum requirements.

Fig. 4-12 Heating supply and return connections aligned to the rear

CAUTION!

If the plug brackets cannot be put on properly,

the couplings can be detached from their

mountings to ensure a very strong or continuous

escape of liquid can occur.

ƔBefore putting on a plug bracket, make sure

that the plug bracket engages in the coupling

groove. To do so, insert the coupling far

enough into the mounting that the groove is

visible through the plug bracket mounting.

ƔInsert the plug bracket up to the end stop.

Fig. 4-13 Cut-out in thermal insulation

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Rotex RKHWMX300C Installation And Maintenance Instructions Manual

Brand: Rotex

Model: RKHWMX300C

Category: Heat pumps

Type: Installation And Maintenance Instructions Manual

This manual is also suitable for

RKHWMX500C

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Rotex RKHWMX300C Installation And Maintenance Instructions Manual

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Rotex RKHWMX300C Installation And Maintenance Instructions Manual

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