Riello START AQUA CONDENS 25 BIS NG Manuel utilisateur

Marque: Riello

Modèle: START AQUA CONDENS 25 BIS NG

Taper: Manuel utilisateur

Start Aqua Condens 25 BIS

EN - INSTALLER AND USER MANUAL

FR - MANUEL D’INSTALLATION ET D’UTILISATION

PT - MANUAL DO USUÁRIO E DO INSTALADOR

HU - TELEPÍTÉSI ÉS HASZNÁLATI KÉZIKÖNYV

EL -ΕΓΧΕΙΡΙΔΙΟΕΓΚΑΤΑΣΤΑΤΗΚΑΙΧΡΗΣΤΗ

Start Aqua Condens 25 BIS

Start Aqua Condens 25 BIS boiler complies with basic

requirements of the following Directives:

- Regulation (EU) 2016/426

- Efficiency directive: Article 7(2) and Annex III of directive

92/42/EEC

- Electromagnetic compatibility directive 2014/30/EU

- Low-voltage directive 2014/30/EU

- Directive 2009/125/EC Ecodesign for energy-using

appliances

- Directive 2010/30/EU Indication by labelling of the

consumption of energy by energy-related products

- Delegated Regulation (EU) No. 811/2013

- Delegated Regulation (EU) No. 813/2013.

Installer’s - user’s manual ...........................................................4

Boiler operating elements .......................................................104

Hydraulic circuit ......................................................................106

Electric diagrams .................................................................... 109

Circulator residual head.......................................................... 113

The following symbols are used in this manual:

9 CAUTION = operations requiring special care and adequa-

te preparation

a NOT ALLOWED = operations that MUST NOT be

performed

RANGE RATED

This boiler can be adapted to the heating requirements of the system, it is possible to change the maximum output in central heating.

Refer to chapter “Adjustments” for calibration.

After setting the desired output report the value in the table on the back cover of this manual, for future references.

La chaudière Start Aqua Condens 25 BIS respecte les

conditions de base requises par les Règlements suivants:

- Règlement (UE) 2016/426;

- Directive Rendement Article 7(2) et Annex III de la

directive 92/42/CEE

- Directive sur la compatibilité électromagnétique 2014/30/

- Directive sur la basse tension 2014/35/EU

- Directive 2009/125/EC concernant les exigences

d’écoconception applicables aux dispositifs d’énergie

- Directive 2010/30/EU concernant l’étiquetage des

consommations d’énergie des produits liés à l’énergie

- Règlement Délégué (UE) No. 811/2013

- Règlement Délégué (UE) No. 813/2013.

Manuel de l’utilisateur- de l’installateur......................................23

Éléments de fonctionnement de la chaudière .........................104

Circuit hydraulique ................................................................... 106

Schémas électriques ...............................................................109

Hauteur de charge résiduelle ..................................................113

Dans certaines parties du manuel on utilise les symboles:

9 ATTENTION = actions demandant une certaine prudence

et une préparation adéquate

a INTERDICTION = actions NE DEVANT absolument PAS

être exécutées

RANGE RATED

Cette chaudière peut être adaptée aux exigences thermiques du système; en effet il est possible de régler la puissance maximale de

la chaudière pour le fonctionnement en mode chauffage. Se référer au chapitre “Réglages” pour consulter les paramètres de réglage.

Une fois que la puissance a été réglée, transférer la valeur dans le tableau présent sur le couvercle arrière. Pour les contrôles et les

réglages ultérieurs, se référer à cette valeur.

A caldeira Start Aqua Condens 25 BIS é compatível com

asespecicaçõesbásicasdasseguintesDiretivas:

- Regulamento (UE) 2016/426

- Diretiva de rendimento: Artigo 7(2) e no Anexo III da

diretiva 92/42/CEE

- Diretiva de compatibilidade eletromagnética 2014/30/UE

- Diretiva de baixa tensão 2014/35/UE

- Diretiva 2009/125/CE concepção ecológica dos

aparelhos que consomem energia

- Diretiva2010/30/UEIndicaçãopormeiodeetiquetagem

do consumo energético pelos produtos relacionados

com energia

- Regulamento Delegado (UE) n.º 811/2013

- Regulamento Delegado (UE) n.º 813/2013.

Manualdousuário-instalador ....................................................43

Elementosdeoperaçãodacaldeira ........................................104

Circuitohidráulico ....................................................................106

Diagramas eléctricos ...............................................................109

Cabeçalresidualdocirculador ................................................113

Em algumas partes do manual são utilizados os símbolos:

9 ATENÇÃO = paraacçõesqueexigemcautelaespeciale

preparaçãoadequada

a PROIBIDO = paraacçõesqueNÃODEVEMabsolutamen-

te ser executadas

RANGE RATED

Estacaldeirapodeseradaptadaàsespecicaçõesdeaquecimentodosistema,épossívelmodicarasaídamáximanoaquecimento

central.

Consulteocapítulo“Ajustes”paraacalibração.

Apósdenirasaídadesejada,relateovalornatabelanacontracapadestemanual,paraconsultasfuturas.

Start Aqua Condens 25 BIS

0476

Start Aqua Condens 25 BISmegfelelazalábbiirányelvek

lényegi követelményeinek:

- 2016/426/EU rendelet

- Hatásfok követelményről szóló 92/42/EGK irányelv 7

cikkely (2) és III melléklet

- 2014/30/EU irányelv az elektromágneses

összeférhetőségről

- 2014/30/EUirányelvakisfeszültségűberendezésekről

- 2009/125/EK irányelv az energiafelhasználó termékek

környezetbaráttervezéséről

- 2010/30/EUirányelvazenergiávalkapcsolatostermékek

energia-fogyasztásánakcímkézésseltörténőjelöléséről

- 811/2013/EUfelhatalmazásonalapulórendelet

- 813/2013/EUfelhatalmazásonalapulórendelet.

HU Telepítésikézikönyv-felhasználóikézikönyv.............................63

Akészülékfunkcionálisrészei .................................................104

Vízkeringetés ........................................................................... 106

Elektromos rajzok ....................................................................109

Keringetőszivattyúmaradékemelőmagassága ......................113

ΟλέβηταςStart Aqua Condens 25 BISσυμμορφώνεται

μετιςβασικέςαπαιτήσειςτωνακόλουθωνΟδηγιών:

- Κανονισμός(ΕΕ)2016/426

- Οδηγίααπόδοσης:Τοάρθρο7(2)καιτουπαραρτήματος

IIIτηςοδηγίας92/42/ΕΟΚ

- Οδηγίαηλεκτρομαγνητικήςσυμβατότητας2014/30/ΕΕ

- Οδηγίαχαμηλήςτάσης2014/35/ΕΕ

- Οδηγία2009/125/ΕΚσχετικάμετονοικολογικόσχεδιασμό

τωνπροϊόντωνπουσυνδέονταιμετηνενέργεια(ErP)

- Οδηγία 2010/30/ΕΕ Για την ένδειξη της κατανάλωσης

ενέργειας και λοιπών πόρων των οικιακών συσκευών

με την επισήμανση και την παροχή ομοιόμορφων

πληροφοριώνσχετικάμεταπροϊόντα

- Κατ’εξουσιοδότησηκανονισμός(ΕΕ)Αρ.811/2013

- Κατ’εξουσιοδότησηκανονισμός(ΕΕ)Αρ.813/2013.

Εγχειρίδιοεγκατάστασης-Εγχειρίδιοχρήσης ............................. 83

Στοιχείαλειτουργίαςτηςσυσκευής ..........................................104

Υδραυλικόκύκλωμα ................................................................106

Ηλεκτρικάδιαγράμματα ...........................................................109

Υπολειπόμενούψοςάντλησηςκυκλοφορητή ..........................113

Σεκάποιασημείατουεγχειριδίουχρησιμοποιούνταιτα

σύμβολα:

9 ΠΡΟΣΟΧΗ = γιαενέργειεςπουαπαιτούνιδιαίτερηπροσο-

χήκαικατάλληληπροετοιμασία

a ΑΠΑΓΟΡΕΥΕΤΑΙ = γιαενέργειεςπουΔΕΝΠΡΕΠΕΙνακά-

νετεσεκαμίαπερίπτωσ

RANGE RATED

ΟλέβηταςαυτόςμπορείναπροσαρμοστείστιςαπαιτήσειςθέρμανσηςτουσυστήματοςΠράγματι,μπορείναρυθμιστείημέγιστηπαροχή

τουλέβηταγιατηλειτουργίαθέρμανσης.Ανατρέξτεστοκεφάλαιο“Ρυθμίσεις”γιατιςρυθμίσειςβαθμονόμησης.

Αφούεπιλεχθείηεπιθυμητήισχύςμεταφέρετετηντιμήστονπίνακαπουπαρέχεταιστοπίσωκαπάκι.

Γιατουςεπόμενουςελέγχουςκαιρυθμίσεις,ανατρέχετεπάνταστηνεπιλεγμένητιμή.

Akézikönyvbenazalábbiszimbólumokszerepelnek:

9 FIGYELEM = megfelelő körültekintést és felkészülést

igénylőtevékenységek

a TILOS = olyan tevékenységek, amelyeket NEM SZABAD

végrehajtani

RANGE RATED

Abojlerarendszerfűtésiigényeihezigazítható.Aközpontifűtésmaximálisteljesítményemódosítható.Abeállításhozlásda“Szabályozás”

részt.

Amegfelelőteljesítménybeállításautánjegyezzefelazértéketakézikönyvhátsóborítójánlévőtáblázatba

Start Aqua Condens 25 BIS

ENGLISH

EN ENGLISH

INSTALLATION MANUAL

1 - WARNINGS AND SAFETY

9 After removing the packaging, check the integrity and

completeness of the supply and, otherwise, contact the Riello

Agency that sold the boiler.

9 The Start Aqua Condens 25 BIS boiler must be installed by a

qualied company in accordance with the regulations in force,

at the end of the installation process, must issue the owner with

a declaration of conformity certifying that the installation has

been performed according to the best working practices and

in observance of applicable legislation and of the indications

provided by Riello in the present instructions booklet.

9 The installer must instruct the user about the operation of the

appliance and about essential safety regulations.

9 When carrying out routine maintenance, it is always

recommended to check the consumption level of the sacricial

anode.

9 The boiler must be used for the purpose for which it was

expressly built. The manufacturer accepts no liability within or

without the contract for any damage caused to people, animals

and property due to installation, adjustment and maintenance

errors or to improper use.

9 In the event of a water leakage, shut off the water supply and

promptly contact the Technical Assistance Centre or other

professionally qualied personnel.

9 Not using the boiler for an extended period of time involves

the execution of at least the following operations:

- turn the main appliance switch and the main system switch

to "off"

- close the fuel and water taps of the heating system

- drain the heating and domestic hot water circuits if there is

a risk of freezing.

9 The boiler maintenance must be carried out at least once a

year.

9 This booklet and that of the User are an integral part of the

appliance and therefore should be carefully preserved and

should always accompany the boiler even when it is sold to

another owner or user or when transferred to another system.

In case of loss or damage, please contact your local Technical

Assistance Centre for a new copy.

9 This appliance should not be operated by children younger

than 8 years, people with reduced physical, sensory or men-

tal capacities, or inexperienced people who are not familiar

with the product, unless they are given close supervision or

instructions on how to use it safely and are made aware by a

responsible person of the dangers its use might entail. Chil-

dren must not play with the appliance. It is the user’s respon-

sibility to clean and maintain the appliance. Children should

never clean or maintain it unless they are given supervision.

9 The boiler is constructed so as to protect both the user and

the installer from any accidents. After each intervention on the

product, pay special attention to the electrical connections,

especially the stripped parts of the wires, which must not

protrude from the terminal board in any way.

9 Dispose of all the packaging materials in the suitable

containers at the corresponding collection centres.

9 When disposing of waste, be careful not to harm human

health or employ procedures or methods which may damage

the environment.

At the end of its life, the product should be not be disposed of

as solid urban waste, but rather it should be handed over to a

differentiated waste collection centre.

Remember that the use of products requiring fuels, electricity and

water necessitates the respect of certain basic safety rules such as:

0 it is forbidden to activate electric devices or appliances such

as switches, household appliances and so on if you notice a

smell of fuel or unburnt fuel;

0 in this case:

- ventilate the room by opening the doors and windows

- close the fuel shut-off device

- promptly call the Technical Assistance Centre or

professionally qualified personnel;

0 it is forbidden to touch the boiler while barefoot or if parts of

your body are wet;

0 it is forbidden to carry out any cleaning operations before

disconnecting the boiler from the electricity supply; to do this,

turn the main system switch to “OFF”;

0 it is forbidden to modify safety and adjustment devices without

the boiler manufacturer's permission and relative instructions;

0 it is forbidden to pull, detach or twist the electric cables that

emerge from the boiler, even if the boiler itself is disconnected

from the mains supply;

0 it is forbidden to plug or reduce the size of any openings used

for airing the installation area;

0 it is forbidden to leave ammable containers and substances

in the room where the boiler is installed;

0 it is forbidden to disperse and leave packaging material within

children's reach as it may be a potential source of hazard;

0 it is forbidden to obstruct the condensate outlet.

2 - DESCRIPTION

Start Aqua Condens 25 BIS is a wall-hung condensing boiler, with

premix burner and low emission of pollutants for heating and for the

production of DHW use and has a 45 litre steel storage tank.

This is an electronically controlled boilers with automatic ignition,

ionisation flame check and with proportional control system of the

gas and air flows, both in heating and DHW.

It uses an aluminium alloy boiler body, has a sealed combustion

chamber and, based on the gas discharge accessory used, is

classified in categories B23P, B53P, C13-C13x, C33-C33x, C43-

C43x, C53-C53x, C63-C63x, C83-C83xC93C93x. The switching of

the heating and DHW modes is performed via a three-way electric

valve which set on DHW when in the rest position. To guarantee the

correct water output in the exchanger, the boiler is equipped with

an automatic by-pass.

The Start Aqua Condens 25 BIS boiler is also equipped with:

- Range Rated - this means the boiler is equipped with a device

that adapts it to the heat requirements of the system, so the

boiler output can be adjusted according to the energy needs of

the building.

- Circulator anti-blocking.

- First-level antifreeze (suitable for indoor installations).

- 8 litre expansion tank.

- 2 litre DHW expansion tank.

- Digital display indicating the operating temperature and alarm

codes.

- Pre-mix low emissions burner.

- Continuous electronic flame modulation for domestic hot water

and heating.

- Premix combustion system which ensures a constant air-gas

ratio.

- Anti-legionella: Legionella is a disease that can be contracted

by inhaling small droplets of water (aerosols) which contain the

Legionella bacteria (bacteria occurs naturally in lakes and rivers

all over the world). The decimation of the bacterium is obtained

by taking the stored water to a temperature over 50/55° C.

It is therefore recommended to position the DHW temperature

selection knob to maximum at least every 2/3 days, taking the

temperature of the stored water to 60° C, and maintaining this

temperature for a minimum time of 5 minutes.

- Ambient thermostat or programmable timer, remote control or

local valve prearrangement.

Start Aqua Condens 25 BIS

ENGLISH

- Provision for external probe connection that enables the climate

control function.

- Prepared for limit thermostat on reduced temperature systems.

- Self-diagnostics for signalling the cleaning of the primary circuit

heat exchanger.

2.1 Safety devices

The Start Aqua Condens 25 BIS boiler is equipped with the

following safety devices:

- Safety valve that intervenes in the event of excessive hydraulic

pressure (max 3 bar).

- Water circuit diagnosis which safeguards the boiler in the

event of insufficient circulation or lack of water. The electronics

of the boiler, by comparing the temperature read by the outlet

and return sensors (circulation analysis) and the rise rate of

the output temperature (no water analysis) ensures the safety

lockout of the appliance.

- Flue gas probe: this intervenes (putting the boiler in safety stop

mode) if the temperature of the combustion products exceeds

the maximum operating temperature of the discharge pipes.

- Flue gas safety evacuation system incorporated in the

pneumatic operation of the gas valve subject to the premix

burner. The gas valve is opened based on the quantity of air

pushed by the fan. This implies that, if the flue gases exhaust

circuit is blocked, the air flow is cancelled and the valve does

not have the ability to open. Furthermore, the float present in

the siphon prevents any passage of the flue gases from the

condensation discharge.

- Condensate discharge obstruction safety device that

via a condensate level sensor blocks the boiler if the level of

condensate in the heat exchanger exceeds the limit allowed.

- Over-temperature safety device on both the delivery and return

lines, with dual probe (limit temperature 95°C).

9 The intervention of the safety devices indicates a boiler

malfunction, therefore immediately contact the Technical

Assistance Centre.

9 The boiler must not be put in service, even temporarily, with

non-operating or tampered safety devices.

9 The safety devices must be replaced by the Technical

Assistance Centre, using exclusively original manufacturer

components.

After carrying out the repair, perform an ignition test.

2.2 Circulator

The residual discharge head for the heating system in terms of flow

rate is outlined in the graph (fig. 1-2).

The heating system pipes must be dimensioned bearing in mind

the residual discharge head available.

Note that the boiler is working properly if the heat exchanger for

heating has sufficient water circulation. For this reason, the boiler

is fitted with an automatic by-pass that sets the correct flow rate for

the water in the heat exchanger for heating in any system condition.

The boilers are equipped with an anti-blocking system which starts

up an operation cycle after every 24 hours of stop, with the mode

selector in any position.

9 The “anti-locking” function is only activated when the boiler is

electrically powered.

0 It is strictly forbidden to operate the circulator without water.

2.3 Circulator signals

With power supply present, the green coil is steady and the

circulator operates at the maximum allowed.

Presence of anomalies

The icon is steady red; the anomaly could be attributable to:

low power supply voltage

circulator blocked

electronic anomaly.

Check the power supply voltage (presence and value); if the cicrulator

is blocke, proceed with the manual release operation (see “Manual

reset of the circulator”); if the anomaly persists, replace the circulator.

communication

ommunication

LIN/MOD/PWM

10 flashes per sec.

Alarm

status

Anomaly

Block/

electronic anomaly

2.4 Manual reset of the circulator

The circulator has an electronic reset function, however if a manual

reset is necessary, proceed as follows:

- use a Phillips screwdriver, preferably Phillips no. 2,

- insert the screwdriver in the hole until it comes into contact with

the reset screw, then press (basically the screw should go in by

about 2 mm) and turn anti-clockwise.

3 - INSTALLATION

3.1 Receiving the product

The Start Aqua Condens 25 BIS boiler is supplied in a single pack

protected by cardboard packaging.

The boiler is supplied as standard with the following material:

- instruction booklet for the installer and user

- bar code labels

- supporting cross-member

- package with hydraulic fittings.

9 The instruction booklets are an integral part of the boiler and

there it is recommended to read them carefully and keep them

in a safe place.

3.2 Dimensions and weights (fig. 3)

Start Aqua Condens 25 BIS

L 600 mm

P 450 mm

H 940 mm

net weight 66 kg

3.3 Handling

After unpacking, handling of the boiler is done manually using the

support frame (fig. 4).

3.4 Installation room

In configuration C, the appliance can be installed in any type of

room and there are no limitations due to ventilation conditions

or room volume since the Start Aqua Condens 25 BIS boiler

has an "airtight" combustion circuit in relation to the installation

environment.

In configuration B23P, B53P the appliance cannot be installed in

bedrooms, bathrooms, showers or where there are open fireplaces

without a proper air flow. The room where the boiler is installed

must have proper ventilation.

9 Consider the clearances necessary to access safety and

adjustment devices and to perform maintenance operations.

9 Check that the electric protection level of the appliance is

suitable for the installation room characteristics.

9 If the boilers are supplied with fuel gas of a specic weight

greater than that of the air, the electric parts will have to be

positioned more than 500mm above ground level.

Start Aqua Condens 25 BIS

ENGLISH

3.5 Installation on appliances that are old or that

need to be updated

When the Start Aqua Condens 25 BIS boiler is installed in old

systems or systems being updated, verify that:

- The smoke pipe is suitable for the temperature of the combustion

products with condensation, calculated and built according to

Standard, is as straight as possible, airtight, insulated and has

no blockages or narrow sections. It is equipped with appropriate

condensate collection and discharge systems

- The electrical system is installed in compliance with the specific

standards and by qualified personnel

- The fuel supply line and eventual tank (LPG) are made according

to specific Standards

- The expansion tank ensures the total absorption of the dilatation

of the fluid contained in the system

- The flow rate and head of the circulator are suitable to the

characteristics of the system.

- The system has been washed and cleaned of mud and grime, de-

aerated and water tight. It is recommended to install a magnetic

filter on the return of the system.

- The boiler condensate drain system (siphon) is connected and

routed to the collection of "white" water.

9 The manufacturer is not liable for any damage resulting from

the incorrect construction of the ue gas discharge system.

9 The ue gas discharge pipes for condensing boilers are made

of special materials that are different compared to those made

for standard boilers.

3.6 Boiler installation

For correct installation, keep in mind that (fig. 5):

- the boiler must not be placed above a stove or other cooking

appliance

- it is forbidden to leave inflammable products in the room where

the boiler is installed

- heat-sensitive walls (e.g. wooden walls) must be protected with

proper insulation

- the minimum clearances for technical and maintenance

interventions must be respected.

The boiler is supplied with a pre-assembly template which allows

for realising the connections to the heating and domestic hot water

system without the boiler, which may be subsequently assembled,

standing in the way. Connect the discharge manifold to a suitable

discharge system (for details, see chapter "Discharge manifold").

FIXING OF THE PRE-ASSEMBLY TEMPLATE

The Start Aqua Condens 25 BIS boiler is designed and built to be

installed in heating and domestic hot water systems.

The position and dimension of hydraulic fittings are shown in the

drawings (fig. 6).

- Position the plate with the aid of a spirit level: check the correct

horizontal plane and the planarity of the boiler rest surface; make

it thicker if needed.

- Trace the fixing points.

- Remove the template and carry out the drilling.

- Fix the plate to the wall using appropriate plugs.

- Check the correct horizontality with a spirit level.

FIXING THE BOILER

- Hook the boiler to the brackets on the plate.

3.7 Hydraulic connections (fig. 7-8-9)

Connect the fittings and gaskets supplied with the system.

We recommend connecting the boiler to the systems introducing

both the DHW shut-off valve as well as the shut-off valves for the

heating system; for this purpose a heating system valves kit and

heating valves kit with filter is available.

Connect brass taps supplied to the fittings and the boiler.

9 The selection and the installation of the system components are

the responsibility of the installer, who must operate according

to the rules of good technique and current Legislation.

9 A carrying case kit is available that allows to make connections

quickly and without unnecessary waste on each system.

M Heating delivery 3/4”

R Heating return line 3/4”

G Gas 3/4”

SC Discharge manifold

AF Cold water inlet 1/2”

AC Hot water outlet 1/2”

3.8 Discharge manifold

The discharge manifold collects: condensate water, any evacuation

water from the safety valve and the system discharge water (fig. 10).

9 The manifold must be connected via a rubber pipe (not

provided) to an appropriate collection and evacuation system

in the white water discharge drain in compliance with current

regulations. The outer diameter of the manifold is 20 mm: it is

therefore advisable to use a rubber pipe ø18-19 mm closed

with a suitable clamp (not provided).

9 Regularly check that the discharge manifold is not blocked by

solid residues that might prevent the outow of condensate

water.

9 The manufacturer is not liable for any damage resulting from

the failure to channel the condensate.

9 Sealing of the condensate drainage connection line must be

guaranteed.

9 The boiler manufacturer is not responsible for any oods

caused by the intervention of the safety valves.

3.9 Installing the external probe (accessory)

The correct operation of the external probe is fundamental for the

good operation of the climatic control.

INSTALLING AND CONNECTING THE EXTERNAL PROBE

The probe must be installed on an external wall of the building to be

heated, observing the following indications:

- it must be mounted on the side of the building most often exposed

to winds (the NORTH or NORTHWEST facing wall), avoiding

direct solar irradiation;

- it must be mounted about 2/3 of the way up the wall;

- it must not be mounted near doors, windows, air outlet points, or

near smoke pipes or other heat sources.

The electrical wiring to the external probe is made with a bipolar

cable with a section from 0.5 to 1 mm2 (not supplied), with a

maximum length of 30 metres. It is not necessary to respect the

polarity of the cable when connecting it to the external probe. Avoid

making any joints on this cable however; if joints are absolutely

necessary, they must be watertight and well protected.

Any ducting of the connection cable must be separated from live

cables (230V AC).

FIXING THE EXTERNAL PROBE TO THE WALL

The probe must be fixed on a smooth part of the wall; in the case

of exposed brickwork or an uneven wall, look for the smoothest

possible area (fig. 11).

- Loosen the plastic upper protective cover by turning it

anticlockwise.

- After deciding on the best fixing area of the wall, drill the holes

for the 5x25 wall plug.

- Insert the plug in the hole.

- Remove the card from its seat.

- Fix the box to the wall, using the screw supplied.

- Attach the bracket, then tighten the screw.

- Loosen the nut of the cable grommet, then insert the probe

connection cable and connect it to the electric clamp.

To make the electrical connection between the external probe and

the boiler, refer to the “Electrical wiring” chapter.

9 Remember to close the cable grommet well, to prevent any air

humidity getting in through the opening.

- Put the board back in its seat.

- Close the plastic upper protective cover by turning it clockwise.

Tighten the cable grommet very well.

3.10 Electrical wiring

The Start Aqua Condens 25 BIS boiler leaves the factory

completely wired and only need to be connected to the mains

power supply (using the supplied power cable) and the ambient

thermostat (TA) and/or timer, via relevant terminals.

- Set the system's main switch to "off"

- Loosen the screws (B) that hold the housing in place (fig. 12)

- Move the base of the shell forward and then upwards in order to

free it from the frame (fig. 13)

- Turn the instrument panel forward

Start Aqua Condens 25 BIS

ENGLISH

- Unscrew the two screws of the small cover on the electronic

board to have access to the terminals (fig. 14).

9 Safety low voltage ambient thermostat input (clean contact).

9 In case of power supply between phases, check with a tester

which of the two wires has a greater potential in relation to

the earth and connect it to the L and similarly connect the

remaining wiring to the N.

9 The earth conductor must be a couple of cm longer than the

others.

9 The boiler can operate with a phase-neutral or phase-phase

supply.

9 Mandatory items:

- use an omnipolar magnetothermic switch, feeder

disconnector, compliant with CEI-EN 60335-1 standards

(contact opening of at least 3.5mm, category 3)

- use cables with a section ≥ 1.5mm2 and comply with the

connection L (phase) - N (Neutral)

- the switch amperage must be adapted to the electric output

of the boiler, refer to technical data to check the electric

output of the model installed

- connect the appliance to an effective grounding system

- safeguard access to the power socket after the installation

0 It is forbidden to use gas and water pipes for grounding the

unit.

9 The manufacturer is not liable for any damage caused by

failure to comply with the wiring diagrams.

9 The installer is responsible for ensuring the appliance is

suitably earthed; the manufacturer will not be liable for any

damage resulting from an incorrect or absent earth connection.

3.11 Boiler configuration

The electronic board has a number of jumpers (JPX) that allow to

configure the boiler.

To access the board, proceed as follows:

- set the main system switch to OFF

- loosen the screws (B) that hold the housing in place (fig. 12)

- move the base of the shell forward and then upwards in order to

free it from the frame (fig. 13)

- turn the instrument panel forward

- unscrew the two screws of the small cover on the electronic

board to have access to the terminals (fig. 14).

JUMPER JP7: pre-selection of the most appropriate heating

temperature adjustment field based on the type of system.

Jumper not inserted - standard system: standard system 40-80 °C

Jumper inserted - floor system: floor installation 20-45°C.

During manufacture, the boiler is configured for standard systems

(fig. 15).

JP1 Calibration (Range Rated)

JP2 Heating timer reset

JP3 Calibration (see paragraph “Adjustments”)

JP4 Jumper on. Do not modify.

JP5 Jumper on. Do not modify.

JP6 Enable night-time compensation and continuous pump

function (only with outdoor probe connected)

JP7 Enable standard system/low temperature

management (see above)

JP8 No jumper. Do not modify.

3.12 Gas connection

The connection of the Start Aqua Condens 25 BIS boiler to the gas

supply must be carried out in compliance with current installation

standards.

Before carrying out the connection, it is necessary to ensure that:

- the gas type is suitable for the appliance

- the piping is thoroughly clean.

9 The gas feeding system must be adapted to the boiler output

and must be equipped with all the safety and control devices

prescribed by the current standards. the use of a lter of

adequate dimensions is recommended.

9 Once the installation is done, check that the junctions carried

out are sealed.

3.13 Flue gas outlet and combustion air suction (fig.

16-17-18-19-20)

The Start Aqua Condens 25 BIS boiler must be equipped with

adequate flue gas outlet and air suction pipes according to the

type of installation, to be chosen from those indicated in the Riello

catalogue.

9 For the maximum lengths of the ducts refer to ue systems

available in the catalogue.

9 The straight length measurement is inclusive of the rst bend

(boiler connection), terminals and joints; with the exception

of the vertical coaxial duct Ø 60-100 mm, where the straight

length does not include the bends.

(TYPE B23P-B53P) INSTALLATION

Flue gas discharge pipe ø 80mm

The flue gas outlet pipe can be directed to the most suitable

direction according to installation requirements.

For installation, follow the instructions supplied with the kit.

In this configuration, the boiler is connected to the flue gas outlet

pipe of ø 80 mm through an adaptor of ø 60-80 mm.

9 In this case, the combustion air is picked up from the boiler

installation room (which must be a suitable technical room

with proper ventilation).

9 The non insulated ue gas outlet pipes are potential sources

of danger.

9 Make sure the ue gas discharge pipe is tilted 3° towards the

boiler.

maximum length of the flue gas

discharge pipe ø 80mm

pressure drop

45° curve 90° curve

60 m 1 m 1,5m

9 "Straight length" means without bends, drainage terminals or

joints.

“AIRTIGHT” INSTALLATION (TYPE C)

The boiler must be connected to concentric or twin flue gas

discharge pipes and air suction pipes, both leading outdoors. The

boiler must not be operated without them.

Concentric pipes (ø 60-100mm)

The concentric pipes can be fitted in most suitable direction in

relation to installation requirements.

9 It is compulsory to use specic pipes (see Riello catalogue).

9 Make sure the ue gas discharge pipe is tilted 3° towards the

boiler.

9 Non-insulated outlet pipes are potential sources of danger.

9 The boiler automatically adapts ventilation according to the

type of installation and the length of the duct. Do not obstruct

or choke the combustion air suction pipe in any way.

HORIZONTAL

straight length of concentric

pipe Ø 60-100 mm

pressure drop

45° curve 90° curve

7,85 m 1,3m 1,6m

VERTICAL

straight length of concentric

pipe Ø 60-100 mm

pressure drop

45° curve 90° curve

8,85 m 1,3m 1,6m

For installation, follow the instructions supplied with the specic

accessory kit for condensing boilers.

9 Straight length means without bends, drainage terminals or

joints.

9 The use of a longer pipe causes a loss of output of the boiler.

Start Aqua Condens 25 BIS

ENGLISH

Concentric pipes (ø 80-125)

The appropriate adaptor kit must be installed for this configuration.

The concentric pipes can be fitted in most suitable direction in

relation to installation requirements. For installation, follow the

instructions supplied with the specific kit for condensing boilers.

straight length of concentric

pipe Ø 80-125 mm

pressure drop

45° curve 90° curve

14,85 m 1 m 1,5m

9 "Straight length" means without bends, drainage terminals or

joints.

Twin pipes (ø 80mm)

The twin pipes can face in the direction most suited to the installation

requirements.

The suction pipe of the combustion air must be connected to the

input after removing the cap fixed with three screws.

The flue gases discharge pipe must be connected to the flue gases

outlet.

For installation, follow the instructions supplied with the specific

accessory kit for condensing boilers.

straight length of twin pipes ø 80mm pressure drop

45° curve 90° curve

36+36 m 1 m 1,5m

9 "Straight length" means without bends, drainage terminals or

joints.

9 The use of a longer pipe causes a loss of output of the boiler.

9 It is compulsory to use specic pipes (see Riello catalogue).

9 Make sure the ue gas discharge pipe is tilted 3° towards the

boiler.

9 The boiler automatically adapts the purging to the type of

installation and the length of the pipes. Do not obstruct or

choke the pipes in any way.

9 For the indication of the maximum lengths of the single pipe,

refer to the charts.

POSSIBLE OUTLET CONFIGURATIONS (g. 21)

B23P-B53P Suction in room, with external outlet

C13-C13x Concentric wall outlet. The pipes may also be split,

but the outputs must be concentric or sufficiently

close together to be subjected to similar wind con-

ditions (within 50cm)

C33-C33x Concentric roof outlet. Outlets as for C13

C43 C43x Discharge and suction in separate shared smoke

pipes subject to similar wind conditions

C53-C53x Separated discharge and suction on wall or roof,

in areas with different pressure levels

C63-C63x Discharge and suction lines using pipes marketed

and certified separately (1856/1)

C83 C83x Outlet in single or shared smoke pipe and wall

suction line.

C93-C93x Discharge on roof (similar to C33) and air suction

via a single existing smoke pipe.

9 Refer to the regulations in force.

3.14 System loading and emptying (fig. 22-23)

FILLING THE SYSTEMS

In case of a new installation or replacement of the boiler, it is

necessary to clean the heating system. In order to ensure the

proper functioning of the product, after any cleaning, additive and/

or chemical treatments (e.g. antifreeze liquids, filming agents, etc.)

check that the parameters in the table are within the indicated values.

Parameters unit of

measurement

Hot water

circuit

Filling

water

pH value - 7-8 -

Hardness °F - <15

Appearance - - clean

Fe mg/kg 0,5 -

Cu mg/kg 0,1 -

Once the hydraulic connections have been carried out, fill the

system. This operation must be carried out with a cold system,

following these instructions:

Domestic hot water system:

- open the cold water inlet tap to fill the storage tank

- to check that the storage tank is full, open a hot water tap and

wait for the water to exit.

Heating system:

- make sure that the system discharge valve (B) is closed

- open the plug of the automatic bleed valves (C and E) by two or

three turns

- open the filling tap (G) until the pressure indicated by the water

pressure gauge is 1,5 bar.

- open the manual bleed valve (D) with a CH11 wrench and close

it once the bleeding procedure is completed; If necessary, repeat

this operation until no more air exits the valve (D)

- once the filling operation of the system is finished, close the filling

tap G.

Each time the boiler is electrically powered, it begins an automatic

venting cycle that lasts about 2 minutes. The symbol “ ” is

displayed during this phase.

NOTE: the venting of the boiler takes place automatically via the

two automatic bleed valves C and E.

NOTE: the first system filling operation must be done by means of

tap G.

EMPTYING THE SYSTEMS

Before starting emptying, switch off the electrical supply by turning

off the system's main switch

Heating system:

- close the shut-off

devices of the heating system

- open the automatic bleed valve (C)

- manually loosen the system drain valve (B), keeping the elbow of

the hose in position to prevent it slipping from its seat

- the system's water is discharged through the discharge manifold (A)

- drain the lowest points of the system.

Domestic hot water system

When there is risk of frost, the domestic hot water system must be

emptied in the following way:

- turn off the main water supply tap

- unscrew the plug on the hose connection (F)

- connect a plastic pipe to the hose connection of the storage tank

discharge valve (F)

- release the discharge device of the valve

- turn on all the hot and cold water taps

- drain the lowest points of the system.

9 The discharge manifold (A) must be connected via a rubber

pipe to an appropriate collection and evacuation system in

the white water discharge drain in compliance with current

regulations. The outer diameter of the manifold is 20 mm: it is

therefore advisable to use a rubber pipe Ø18-19 mm closed

with a suitable clamp (not provided). The manufacturer is not

liable for any damage resulting from the failure to channel the

condensate.

Eliminating the air from the heating circuit and boiler (fig. 24)

During the initial installation phase, or in the event of a maintenance,

you are advised to perform the following sequence of operations:

- Switch off the power supply to the boiler.

- Using a CH11 spanner open the manual air vent valve located

above the air box; the tube supplied with the boiler must be

connected to the valve to let out the water into an outside

container.

- Turn on the system filling tap on the hydraulic unit and wait until

the water starts coming out of the valve. Make sure that it comes

only water.

- Close the manual air vent valve with the CH11 spanner.

- Turn off the system filling tap when the water pressure indicated

by the hydrometer reaches 1-1.5 bar.

Start Aqua Condens 25 BIS

ENGLISH

- Switch on the power supply to the boiler leaving the boiler in OFF

mode. Check that the gas tap is closed.

- The boiler, now, starts the vent cycle. Perform it by checking

that there is no air inside the boiler and that the pressure does

not drop too much (otherwise repeat the operations described

above).

- Turn on the gas tap and ignite the boiler.

4 - COMMISSIONING AND MAINTENANCE

4.1 First commissioning preparation

Before the ignition and the functional testing of the Start Aqua

Condens 25 BIS boiler, it is necessary to:

- check that the system fuel and water supply taps are open

- check that the gas type and the power supply pressure are those

for which the boiler is designed

- make sure the cap on the vent valve is open

- check on the display that the pressure of the water circuit when

cold is between 1 bar and 1.5 bar and that the circuit is vented

- check that the pre-loading of the expansion tank is adequate

(see the "Technical data" table)

- check that the electrical connections have been carried out

correctly

- check that the combustion product outlet and air suction pipes

were adequately realised

- check that the circulator turns freely; undo the inspection screw

and check with a flat screwdriver that the rotor shaft moves

without hindrances.

9 Before loosening or removing the closing tap of the circulator,

protect the underlying electrical devices from possible water

leakage.

4.2 Control prior to commissioning

9 The rst time you turn the boiler on and in case of maintenan-

ce work, before using the appliance you must ll the siphon

with water and make sure that the condensation is evacuated

correctly.

Fill the condensation collection siphon pouring 1 litre of water into

the boiler combustion-analysis outlet with the boiler off, and check

that:

the safety cut-off device is oating

water is owing correctly from the discharge pipe out of the boiler

the condensate outlet connection line is watertight.

If the condensate outlet circuit (siphon and pipes) is working cor-

rectly, the condensation level will not exceed the maximum.

Filling the siphon before using the appliance, and the use of a sa-

fety cut-off device inside the siphon, prevent exhaust gases from

being released into the environment.

Repeat during standard and non-standard maintenance work.

~15 mm

MAX

4.3 First commissioning

- Adjust the ambient temperature thermostat to the desired

temperature (~20°C) or, if the system is equipped with a

programmable thermostat or timer, ensure that the thermostat or

timer is "active" and set correctly (~20°C)

- A variety of information appears on the display for each power

supply, including the value of the flue gases probe meter (-C- XX

- see "Display and fault codes" - Fault A 09), the boiler will then

start an automatic venting cycle of about 2 minutes

- The display shows the symbol

To stop the automatic venting cycle, proceed as follows:

- access the electronic board by removing the housing, turning the

instrument panel forwards you and opening the terminal board

cover.

Then:

- press the CO button.

9 Live electrical parts (230 Vac).

CN8

CN7

CN11

CN10

CN9

CN6 CN5

CN12

CN4

CN3

CN2

AKL

CN1

FA1

FA2

JP1

JP2

JP3

JP4

JP5

JP6

JP7

JP8

CN15

CN13

CN14

SW1

3.15A T

CO button

To start up the boiler it is necessary to carry out the following

operations:

- power the boiler

- turn on the gas tap to allow fuel flow

- adjust the ambient thermostat to the required temperature

(~20°C).

Turn the mode selector to the required position:

Winter mode

Turn the function selector to within the adjustment range. The

boiler produces domestic hot water and heating water. The boiler

lights automatically in response to a heat request. The digital

display indicates the heating water temperature. The boiler lights

automatically in response to a request for domestic hot water. The

display indicates the domestic hot water temperature.

WINTER MODE

Start Aqua Condens 25 BIS

ENGLISH

Adjustment of the heating water temperature

To adjust the heating water temperature, turn the mode selector to

within the adjustment range (turn clockwise to increase the value

and anticlockwise to reduce the value).

Depending on the type of system, the most suitable temperature

range can be pre-selected:

- standard systems 40-80 °C

- floor installations 20-45°C.

For details see paragraph “Boiler configuration”.

HEATING WATER

TEMPERATURE

DOMESTIC HOT WATER

TEMPERATURE

Adjusting the heating water temperature with an external

probe connected

When an external probe is installed, the delivery temperature

is automatically selected by the system, which quickly adjusts

the ambient temperature according to variations in the outside

temperature. If you want to alter the temperature value (increasing

or reducing the value automatically calculated by the electronic

card), use the heating water temperature selector: turn it clockwise

to increase the temperature, or anticlockwise to reduce it. The

correction possibility is between 15° C and 25° C levels of comfort

(0 = 20° C), shown on the digital display by rotating the knob.

Summer mode

The standard domestic hot water-only mode is activated by

turning the selector to the summer symbol . The boiler lights

automatically in response to a request for domestic hot water. The

digital display indicates the delivery temperature.

SUMMER MODE

Adjustment of the domestic hot water temperature

To adjust the domestic hot water temperature (for baths, showers,

kitchen etc.), turn the dial with the symbol clockwise to increase

the value, or anticlockwise to decrease the value (min. value 37°C -

max. value 60 °C). The boiler is in standby until the burner switches

on following a heat request. The boiler continues to function until

the temperatures set on the boiler are reached, or the heat request

terminates; it will then go back to standby. In the case of a temporary

stop the digital display shows the fault code.

ADJUSTING THE DOMESTIC HOT WATER TEMPERATURE

Heating Temperature Control function (C.T.R.)

Turn the heating water temperature selector into sector highlighted

with white markers to activate the C.T.R. self-adjusting system:

depending on the temperature set on the ambient thermostat and

the time taken to reach it, the boiler automatically varies the heating

water temperature by reducing operating time, thereby achieving

increased comfort and energy savings.

C.T.R. FUNCTION

Reset function

To restore normal operation, turn the function selector to off, wait

5-6 seconds, and then turn it to the required position. At this point,

the boiler will restart automatically.

NOTE: If the attempts to reset the appliance do not activate

operation, contact the Technical Assistance Centre.

RESET FUNCTION

4.4 Checks during and after the first commissioning

Following commissioning, check that the Start Aqua Condens

25 BIS, boiler performs the start-up procedures and subsequent

shutdown properly by acting on the:

- mode selector

- calibration of the heating water temperature selector and

domestic hot water temperature selector

- requested ambient temperature (by intervening on the ambient

thermostat or programming timer).

Also check the domestic hot water operation by opening a hot

water tap with the mode selector both in summer mode and in

winter mode.

Check the full stop of the boiler by turning off the system's main

switch.

After a couple of minutes of continuous operation to be obtained

by turning on the system's main switch, the mode selector on

(summer) and by keeping open the domestic hot water device, the

binders and manufacturing waste evaporate and it will be possible

to perform:

- the supply gas pressure check

- the combustion check.

Supply gas pressure check

- Turn the mode selector to to turn off the boiler

Start Aqua Condens 25 BIS

ENGLISH

- Undo the screws (B) that fasten the shell

- Move the housing base forwards and then upwards to unhook it

from the frame

- Turn the instrument panel forward

- Undo by two turns the screw of the pressure test point upstream

from the gas valve and connect the pressure gauge

Pressure test point

upstream of the

valve

- Power the boiler electrically by setting the main system switch

to “ON”

- Bring the mode selector to summer

- Turn the DHW temperature selector to maximum. Make sure that

the water in the storage tank is not at temperature

- Fully open the hot water tap

- With the burner at maximum output, check that the gas pressure

is comprised between the minimum and rated power supply

pressure values indicated in the table

- Turn off the hot water tap

- Disconnect the pressure gauge and tighten the pressure test

point screw again upstream from the gas valve.

Combustion check

To carry out the combustion analysis, proceed as follows:

- turn the mode selector to to turn off the boiler

- turn the DHW adjustment selector to the combustion analysis

mode position

- wait for the burner to fire (approx. 6 seconds). “ACO” is displayed

and the boiler operates at the maximum heating output

- remove the screw and the cover on the air distribution box (see

image below)

- insert the flue gas analysis probe into the sockets provided on

the air box

- check that the CO2 values correspond to those indicated in the

"Technical data" table, if the value displayed is different, modify

as indicated in chapter "Gas valve calibration"

- perform the combustion check.

cover

screw

Then:

- remove the analyser probe and close the combustion analysis

sockets with the screw.

9 The ue gas analysis probe should be inserted until its

reaches the stop.

9 Even during the combustion analysis phase, the function that

switches the boiler off when the water temperature reaches

the maximum limit (about 90°C) remains enabled.

When the checks are completed:

- position the mode selector depending on the operating mode

desired

- adjust the selectors according to the client's requirements.

9 The boiler is supplied for use with methane gas (G20) and are

already factory set as specied on the rating plate, so do not

require any calibration.

9 All checks must be carried out exclusively by the Technical

Assistance Centre.

4.5 Setting the thermoregulation

Thermoregulation only works with external sensor connected, so

once installed, connect the outdoor probe - accessory on request -

to the appropriate connections provided on the terminal board of the

boiler. This enables the THERMOREGULATION function.

Choice of the compensation curve

The compensation curve for heating maintains a theoretical

temperature of 20°C indoors, when the external temperature is

between +20°C and -20°C. The choice of the curve depends on

the minimum external temperature envisaged (and therefore on the

Start Aqua Condens 25 BIS

ENGLISH

geographical location), and on the delivery temperature envisaged

(and therefore on the type of system). It is carefully calculated by

the installer on the basis of the following formula:

KT = T.outlet envisaged - Tshift

20- min. design external T.

Tshift = 30°C standard system

25°C floor installations

If the calculation produces an intermediate value between two

curves, you are advised to choose the compensation curve nearest

the value obtained.

Example: if the value obtained from the calculation is 1.3, this is

between curve 1 and curve 1.5. Choose the nearest curve, i.e. 1.5.

Selection of the KT must be made by acting on the P3 trimmer on

the card (see multi-wire electrical diagram).

To access P3:

- remove the housing

- turn the instrument panel forward

- undo the fixing screws of the terminal board cover

- unhook the board cover.

9 Live electrical parts (230 Vac).

The settable KT values are as follows:

- standard system: 1.0-1.5-2.0-2.5-3.0

- floor installation: 0.2-0.4-0.6-0.8

and appear on the display for a duration of about three seconds

after the rotation of trimmer P3.

TYPE OF HEAT REQUEST

If an ambient thermostat is connected to the boiler

(Jumper JP6 not inserted)

The heat request is made by the closure of the room thermostat

contact, while the opening of the contact produces a switch-off.

The delivery temperature is automatically calculated by the boiler,

although the user may interact with the boiler. Using the interface

to modify the HEATING, you will not have the HEATING SET-

POINT value available, but a value that you can set as preferred

between 15 and 25°C. The modification of this value will not directly

modify the delivery temperature, but will automatically affect the

calculation that determines the value of that temperature, altering

the reference temperature in the system (0 = 20°C).

If a programming timer is connected to the boiler

(JUMPER JP6 inserted)

With the contact closed, the heat request is made by the delivery

probe, on the basis of the external temperature, to obtain a nominal

ambient temperature on DAY level (20°C). The opening of the

contact does not produce a switch-off, but a reduction (parallel

translation) of the climatic curve on NIGHT level (16°C).

This will activate the night time function.

THERMOREGULATION CURVES

Temperatura esterna (˚C)

Temperatura di mandata (˚C)

100

-20

0,2

0,4

0,6

1,0

1,5

2,02,53,0

T80

T45

-15-10-505101520

T80

- std heating system maximum setpoint temperature

(jumper pos. 1 not inserted).

T45 - oor heating system maximum setpoint temperature

(jumper pos. 1 inserted).

The display shows the value of the curve multiplied by 10

(e.g.. 3.0 = 30)

DELIVERY TEMPERATURE (°C)

OUTSIDE TEMPERATURE (°C)

DELIVERY TEMPERATURE (°C)

OUTSIDE TEMPERATURE (°C)

CLIMATIC CURVE CORRECTION

20°C

25°C

15°C

-20-15-10-5051015202530

DELIVERY TEMPERATURE (°C)

OUTSIDE TEMPERATURE (°C)

PARALLEL NIGHT-TIME REDUCTION

-20-15-10-505101520

16 °C

20°C

4.6 Display and fault codes

BOILER STATUS DISPLAY TYPE OF ALARM

Off status (OFF) OFF None

Stand-by - Signal

ACF alarm lockout module

A01

Definitive lockout

ACF electronics fault alarm

Fumes exhaust - air intake

obstruction alarm

Limit thermostat alarm A02

Definitive lockout

Tacho fan alarm A03

Definitive lockout

Water pressure switch alarm A04

Definitive lockout

NTC storage tank fault A06 Signal

NTC outlet fault temperature

A07

stop

switch-off

Flue gases probe

Heating delivery

Temporary

then final

Outlet/return line probe

differential alarm

Definitive lockout

NTC heating

return line fault

A08

stop

switch-off

Flue gases probe

HEATING RETURN LINE

Temporary

then final

Outlet/return line probe

differential alarm

Definitive lockout

Cleaning the primary

heat exchanger

A09

Signal

NTC flue gases fault

Flue gases probe over-

temperature Definitive lockout

Parasite flame A11 stop

switch-off

Low temperature system

thermostat alarm A77 stop

switch-off

Temporary, pending ignition 80°C

flashing

stop

switch-off

Start Aqua Condens 25 BIS

ENGLISH

BOILER STATUS DISPLAY TYPE OF ALARM

Water pressure switch

intervention

flashing

stop

switch-off

Calibration service ADJ Signal

Calibration installer

Chimney sweep ACO Signal

Vent cycle Signal

External probe presence Signal

Domestic water heat request 60°C Signal

Heating heat request 80°C Signal

Antifreeze heat request Signal

Flame present Signal

To restore operation (reset alarms):

Faults A01-02-03

Turn the mode selector to OFF, wait 5-6 seconds, then return

the selector to the required position.

If the reset attempts do not reactivate the boiler, request the

intervention of the Technical Assistance Centre.

Fault A04

In addition to the fault code, the digital display displays the symbol

Check the pressure value indicated by the water gauge:

if it is less than 0.3 bar, position the function selector on OFF and

adjust the filling tap until the pressure reaches a value between 1

and 1.5 bar. Then turn the function selector to the required position.

The boiler will carry out a venting cycle lasting about 2 minutes.

If pressure drops are frequent, request the intervention of the

Technical Assistance Centre.

Fault A06

The boiler functions normally but does not guarantee a constant

domestic hot water temperature, which remains set at around 50°C.

The intervention of the Technical Assistance Centre is required.

Fault A07-A08

Contact the Technical Assistance Centre.

Fault A09

Turn the mode selector to OFF, wait 5-6 seconds, then return

the selector to the required position.

If the reset attempts do not reactivate the boiler, request the

intervention of the Technical Assistance Centre.

Fault A09

The boiler is equipped with an auto-diagnostic system which,

based on the total number of hours in certain operating conditions,

can signal the need to clean the primary exchanger (alarm code 09

and flue gas probe meter >2,500).

Once the cleaning operation has been completed, reset to zero the

total hour meter with special kit supplied as an accessory following

procedure indicated below:

- switch off the power supply

- remove the housing

- turn the instrument panel forward

- remove the cover of the electrical parts by means of the fixing

hooks

- while the boiler is being fed electrically, press the CO button for

at least 4 seconds to verify the successful reset of the meter.

Disconnect and connect again the power supply to the boiler the

meter value is displayed after the signal "- C -".

9 Live electrical parts (230 Vac).

NOTE: the meter resetting procedure should be carried out after

each in-depth cleaning of the primary exchanger or if this latter

is replaced. To check the status of the totalled hours, multiply the

value read by 100 (e.g. value read 18 = total hours 1800 - value

read 1= total hours 100).

The boiler continues to operate normally with the active alarm.

Fault A77

The fault is self-resetting, if the boiler does not restart contact the

Technical Assistance Centre.

4.7 Temporary switch-off

In the event of temporary absences (weekends, short trips, etc.)

set the mode selector to (OFF).

9 In this way (leaving the electricity and fuel supplies enabled),

the boiler is protected by the following systems:

- antifreeze: when the boiler water temperature falls to 7°C, the

circulator is activated and, if necessary, also the burner (at the

minimum output) to bring the water temperature back within

the safety values (35°C). The icon will flash on the display,

indicating that the anti-freeze function is active.

- circulator anti-blocking: an operation cycle is activated every 24 h.

4.8 Switching off for long periods

If the boiler is not used for a long time, the following operations

must be carried out:

- set the mode selector to off (OFF)

- set the system’s main switch to “off”

- close the fuel and water taps of the heating and domestic hot

water system.

9 In this case, the anti-freeze and anti-blocking systems are

deactivated.

9 Drain the heating and domestic water system if there is any

risk of freezing.

4.9 Maintenance

Periodic maintenance is an “obligation” required by law and is

essential to the safety, efficiency and lifetime of the boiler.

It allows for the reduction of consumption, polluting emissions and

keeping the product reliable over time.

Before starting maintenance operations:

- perform the analysis of the combustion products to check the boiler

operation status then cut the electrical supply by turning off the

system’s general switch

- close the fuel and water taps of the heating and domestic hot

water system.

The appliance must be systematically controlled at regular intervals

to make sure it works correctly and efficiently and conforms to

legislative provisions in force. The frequency of controls depends on

the conditions of installation and usage, it being anyhow necessary

to have a complete check carried out by authorized personnel from

the Servicing Centre every year.

- Check and compare the boiler’s performance with the relative

specifications.

- Any cause of visible deterioration must be immediately identified

and eliminated.

- Closely inspect the boiler for signs of damages or deterioration,

particularly with the drainage and aspiration system and electrical

apparatus.

- Check and adjust – where necessary – all the burner’s

parameters.

- Check and adjust – where necessary – the system’s pressure.

Start Aqua Condens 25 BIS

ENGLISH

- Analyze combustion. Compare results with the product’s

specification. Any loss in performance must be identified and

corrected by finding and eliminating the cause.

- Make sure the main heat exchanger is clean and free of any

residuals or obstruction; if necessary clean it.

- Check and clean – where necessary – the condensation tray to

make sure it works properly.

9 Always switch off the power to the appliance and close the

gas by the gas cock on the boiler before carrying out any

maintenance and cleaning jobs on the boiler.

9 After performing the necessary maintenance operations, the

original adjustments must be restored and the combustion

product analysis must be performed to check the correct

operation.

9 Do not clean the appliance or any latter part with ammable

substances (e.g. petrol, alcohol, etc.).

9 Do not clean panelling, enamelled and plastic parts with paint

solvents. Panels must be cleaned with ordinary soap and

water only.

4.10 Adjustments

The Start Aqua Condens 25 BIS boiler is supplied for operation with

Methane gas (G20) and is factory set as shown on the rating plate.

If adjustments have to be redone, for example after extraordinary

maintenance, after the gas valve replacement or after conversion

from methane gas to LPG and vice versa, the following procedures

must be followed.

9 The maximum heating electrical value adjustment, the

minimum and maximum electrical heating, must be carried out

in the sequence indicated and exclusively by the Technical

Assistance Centre.

- Disconnect the power supply to the boiler.

- Turn the heating water temperature selector to its maximum.

- Remove the housing and turn the instrument panel (refer to

previous chapters for the detail of the figures).

- Unscrew the fixing screws of the hatch on the terminal board cover.

- Insert jumpers JP1 and JP3

CN8

CN7

CN11

CN10

CN9

CN6 CN5

CN12

CN4

CN3

CN2

AKL

CN1

FA1

FA2

JP1

JP2

JP3

JP4

JP5

JP6

JP7

JP8

CN15

P3 P2

CN13

CN14

SW1

3.15A T

Power up the boiler.

The display shows "ADJ" for about 4 sec.

Proceed with the modification of the following parameters:

1. Absolute/domestic maximum

2. Minimum

3. Maximum heating

4. Slow ignition

as described below:

- turn the heating water temperature selector to set the desired

value

- press the CO button and move on to the next parameter setting.

CN8

CN7

CN11

CN10

CN9

CN6 CN5

CN12

CN4

CN3

CN2

AKL

CN1

FA1

FA2

JP1

JP2

JP3

JP4

JP5

JP6

JP7

JP8

CN15

P3 P2

CN13

CN14

SW1

3.15A T

CO button

9 Live electrical parts (230 Vac).

The following icons are displayed:

1. during absolute/domestic maximum calibration

during the minimum calibration

during the maximum heating calibration

during the slow ignition calibration confirm the adjustment

code by pressing the ENTER key.

End the procedure by removing the JP1 and JP3 jumpers to store

the set values. The function can be terminated at any time without

saving the set values while maintaining the initial ones:

- removing jumpers JP1 and JP3 before all 4 parameters have

been set

- turning the mode selector to OFF/RESET

- removing the mains voltage 15 minutes after its activation.

9 The calibration does not entail the ignition of the boiler.

9 By rotating the heating setpoint selector knob, the number of

rotations expressed in hundreds (e.g. 25 = 2500 rpm) is auto-

matically displayed.

The calibration parameter display function is activated with the

selector on summer or winter and pressing the CO button on the

card regardless of whether or not there is a heat request. The

function cannot be activated if a remote control is connected.

When this function is activated, the calibration parameters each

appear (in the order shown below) for 2 seconds. The relative icon

is indicated in line with each parameter, and the fan rotation value

expressed in hundreds.

1. Maximum

2. Minimum

3. Maximum heating

4. Slow ignition

5. Maximum heating adjusted

GAS VALVE CALIBRATION

- Power the boiler

- Open the gas tap

- Turn the mode selector to OFF/RESET (display off)

- Remove the housing and turn the instrument panel (refer to

previous chapters for the detail of the figures)

- Undo the fixing screws of the cover to access the terminal board

- Press the “CO” button once.

9 Live electrical parts (230 Vac).

- Wait for the burner to fire. “ACO” is displayed. The boiler operates

at the maximum heating output. The "combustion analysis"

function remains active for 15 min. If an inlet temperature of

90°C is reached the burner turns off. It will ignite again when the

temperature falls below 78°C.

- Remove the screw and the cover on the air distribution box

- Insert the flue gas analysis probe into the sockets provided on

the air box

- Press the “combustion analysis” button a second time to reach

the number of revolutions that corresponds to the maximum

domestic hot water output (table 1).

Start Aqua Condens 25 BIS

ENGLISH

TABLE 1

MAXIMUM NUMBER

OF FAN ROTATIONS

GAS

METHANE (G20)

LIQUID GAS

PROPANE (G31)

25 BIS

HEAT. 71 70 rpm

DHW 71 70

- Check the CO2 value (table 2): if the value does not comply with

the indications in the table act on the gas valve max adjustment

screw.

TABLE 2

Max. CO2GAS

METHANE (G20)

LIQUID GAS

PROPANE (G31)

25 BIS 9.0 10.0 %

- Press the “combustion analysis” button a third time to reach the

number of revolutions that corresponds to the minimum output

(table 3).

TABLE 3

MINIMUM NUMBER

FAN ROTATIONS

GAS

METHANE (G20)

LIQUID GAS

PROPANE (G31)

25 BIS 21 21 rpm

- Check the CO2 value (table 4): if the value does not comply with

the indications in the table act on the gas valve min. adjustment

screw.

TABLE 4

Min. CO2GAS

METHANE (G20)

LIQUID GAS

PROPANE (G31)

25 BIS 9,5 10.0 %

TABLE 5

SLOW IGNITION GAS

METHANE (G20)

LIQUID GAS

PROPANE (G31)

25 BIS 40 40 rpm

Adjustment screw

minimum output

Adjustment screw

maximum output

9 If the CO2 values do not correspond to the values in the

Multigas table, make further adjustments.

- To exit the "combustion analysis" function, turn the mode selector

to the required position.

- Pull out the flue gas analysis probe and replace the plug.

- Close the instrument panel and reposition the cover

- The "combustion analysis" function is automatically disabled if

the card generates an alarm. In the event of an anomaly during

the combustion analysis phase, perform the reset procedure.

RANGE RATED

This boiler can be adapted to the heating requirements of the

system, in fact it is possible to set the maximum delivery for heating

operation of the boiler itself:

- Disconnect the power supply to the boiler

- Turn the heating water temperature selector to its maximum

- Remove the housing and turn the instrument panel (refer to

previous chapters for the detail of the figures)

- Unscrew the fixing screws of the hatch on the terminal board

cover

- Insert the jumper JP1

- Power up the boiler.

The display shows "ADJ" for about 4 sec.: it is then possible to

change the maximum heating value by means of the heating water

temperature selector and the CO button in order to set and confirm

the desired value.

The icon will appear on the display .

Finish the procedure by removing the jumper JP1 to store the set

values.

Once the required output has been set (maximum heating), indicate

the value on the self-adhesive label supplied. For subsequent

controls and adjustments, refer to the set value.

9 The calibration does not entail the ignition of the boiler.

By rotating the heating setpoint selector knob, the value

expressed in hundreds (e.g. 25 = 2.500 rpm) is automatically

displayed.

The boiler is supplied with the adjustments shown in the table.

Depending on plant engineering requirements or regional flue

gas emission limits it is, however, possible to modify this value,

referring to the graphs below.

Fan rotations (r.p.m.)

THERMAL OUTPUT CURVE - NO. OF FAN ROTATIONS (MTN)

Heat output (kW)

2000

2500

3000

3500

4000

4500

5000

5500

6000

6500

7000

7500

4 6 8 10 12 14 16 18 20 22 24 26

4.11 Conversions from one type of gas to another

The boiler is designed to operate with methane gas (G20) according

to the rating plate. It may however be converted from one type of

gas to another by using the special kits supplied on demand.

- Methane conversion kit

- LPG conversion kit

9 The conversion must be carried out solely by the Technical

Assistance Centre or by rpersonnel authorised by even when

the boiler is already installed.

9 Refer to the instructions supplied with the kit for assembly.

9 After conversion, adjust the boiler again following the indica-

tions in the specic section and apply the new identication

label contained in the kit.

Conversion from a family gas to other family gas can be performed

easily also when the boiler is installed. This operation must be

carried out by professionally qualified personnel.

For disassembly, refer to the instructions provided below:

- Disconnect the power supply to the boiler and close the gas tap

- Remove in the following order: air distribution box cover and

casing

- Remove the gas train (A)

- Remove the nozzle (B) contained within the gas train and replace

it with the one contained in the kit

- Reassemble the gas train

- Reassemble the air distribution box cover

- Power-up the boiler and open the gas tap.

Start Aqua Condens 25 BIS

ENGLISH

USER

A - General warnings

9 Upon receiving the product, check the integrity and

completeness of the supply and, if it does not match what was

ordered, contact the Riello Agency that sold the appliance.

9 The installation of the Start Aqua Condens 25 BIS boiler must

be performed by a qualied company that will issue the owner

with the installation conformity declaration on completion

of the work, in compliance with the applicable National and

Local Standards and the instructions supplied by Riello in the

instruction booklet supplied with the appliance.

9 The boiler must be used for the purpose for which it was

expressly built. The manufacturer accepts no liability within or

without the contract for any damage caused to people, animals

and property due to installation, adjustment and maintenance

errors or to improper use.

9 In the event of a water leak, disconnect the boiler from the

main power supply, shut off the water supply and promptly

notify the Technical Assistance Centre or professionally

qualied personnel.

9 Regularly check that the operating pressure of the hydraulic

system is greater than 1 bar and less than the maximum limit

for the appliance. Otherwise, contact the Technical Assistance

Centre or professionally qualied personnel.

9 This appliance should not be operated by children younger

than 8 years, people with reduced physical, sensory or men-

tal capacities, or inexperienced people who are not familiar

with the product, unless they are given close supervision or

instructions on how to use it safely and are made aware by a

responsible person of the dangers its use might entail. Chil-

dren must not play with the appliance. It is the user’s respon-

sibility to clean and maintain the appliance. Children should

never clean or maintain it unless they are given supervision

9 Not using the boiler for an extended period of time involves

the execution of at least the following operations:

- position the appliance's main switch to the "OFF" position

- set the system's main switch to "off"

- turn off the fuel and water taps of the heating system

- drain the heating and domestic hot water circuits if there is

a risk of freezing.

9 The boiler maintenance must be carried out at least once a

year.

9 This booklet, along with that for the installer and the Technical

Assistance Centre, are an integral part of the appliance and

must therefore be kept in a safe place. They must always

be passed on with the boiler if this is transferred to another

owner/user or to another system. In case of loss or damage,

please contact your local Technical Assistance Centre for a

new copy.

9 The circulator anti-locking function is activated after 24 hours

of non-use, with the mode selector in any position.

9 For installation, it is advisable to contact specialised personnel.

At the end of its life, the product should be not be disposed of

as solid urban waste, but rather it should be handed over to a

differentiated waste collection centre.

B - Basic safety rules

Rem

ember that the use of products requiring fuels, electricity and

water necessitates the respect of certain basic safety rules such as:

0 it is forbidden to activate electric devices or appliances such

as switches, household appliances and so on if you notice a

smell of fuel or unburned fuel. In this case:

- ventilate the room by opening the doors and windows;

- close the fuel shut-off device;

- promptly call the Technical Assistance Centre or

professionally qualified personnel;

0 it is forbidden to touch the boiler while barefoot or if parts of

your body are wet;

0 any technical or cleaning operation is forbidden before

disconnecting the appliance from the main power supply by

turning the system's main switch to "OFF" and the main switch

of the boiler to "OFF";

0 do not modify the safety or adjustment devices without the

manufacturer’s authorisation and precise instructions;

0 it is forbidden to plug the condensate drain;

0 it is prohibited to pull, detach or twist the electrical cables

coming from the appliance even if it is disconnected from the

mains power supply;

0 it is prohibited to cover or reduce the size of the ventilation

openings in the room where the boiler is installed. The

ventilation openings are vital for correct combustion;

0 it is forbidden to expose the appliance to the elements because

it is not designed to function outdoors;

0 it is forbidden to leave ammable containers and substances

in the room where the boiler is installed;

0 this device can not be used by persons (including children)

with reduced physical, sensory, mental capacity or lack of

experience and knowledge of the subject, unless they are

supervised or instructed by the person responsible for its safe

operation;

Adjust the boiler as described in chapter "Settings" referring to the

data concerning the LPG.

9 Conversion must be carried out by qualied personnel.

9 After the transformation, apply the new rating plate included

in the kit.

4.12 Boiler cleaning

Before any cleaning operation, switch off the electrical supply by

turning the system's main switch to "Off".

External cleaning

Clean the housing, the control panel, the painted parts and the

plastic parts with a cloths dipped in soap and water.

In the case of stubborn stains dampen the cloth with a mixture of

50% water and methylated spirit or with specific products.

0 Do not use fuels and/or sponges soaked in abrasive solutions

or powder detergents.

Internal cleaning

Before starting internal cleaning operations:

- close the gas shut-off valve

- close the system taps.

4.13 Cleaning the water tank (fig. 25)

After removing the flange it will be possible to inspect and clean

inside the water tank and check the condition of the magnesium

anode.

- Turn off the hot water system stopcock and empty the water tank

through the drainage device (fig. 22)

- Loosen the nut and extract the anode (1)

- Remove the nuts (2) blocking the external flange (3) and extract it

- Clean the inside surfaces and remove all the debris through the

opening

- Check the wear conditions of the magnesium anode (1), replace

if necessary

- Check that the gasket (4) is in good condition after extracting it

from the inside flange (5), replace if necessary.

Complete the work of cleaning, re-mount the components working

the other way round to above description.

Start Aqua Condens 25 BIS

ENGLISH

0 Do not access the inside of the boiler. Any work on the boiler

should be carried out by the Technical Assistance Centre or by

professionally qualified personnel.

0 it is forbidden to disperse the packaging material in the

environment and leave it within children's reach as it may be a

potential source of danger. It must be disposed in accordance

with the present law;

0 it is forbidden to disconnect the boiler from the electricity

supply and close the gas tap if there is a risk of the temperature

falling below zero, as the 1st level antifreeze system (see the

chapter on temporary switch-off) would be disabled;

0 it is forbidden to intervene on sealed elements;

0 it is forbidden to place any objects on the boiler, as they could

be a source of danger.

C - Commissioning

The boiler should be started up for the rst time by the Technical

Assistance Centre after which the boiler will be able to operate

automatically. It may, however, be necessary to restore boiler oper-

ation without contacting the Technical Centre: for example after a

lengthy period of absence.

In such cases, the following checks and operations must be carried

out:

- make sure the fuel and water taps of the heating system and the

domestic water system are open.

- check the operating condition of the consumption water filtering

and/or treatment appliances.

- on the digital display, check that the pressure of the cold water

circuit is between 1 bar and 1.5 bar

- adjust the ambient temperature thermostat to the desired

temperature (~20°C) or, if the system is equipped with a

programmable thermostat or timer, ensure that the thermostat or

timer is "active" and set correctly (~20°C)

- each time the boiler is electrically powered the display shows a

series of information, then the boiler begins an automatic venting

cycle that lasts about 2 minutes

- the display shows the symbol .

Turn the mode selector to the required position:

Winter mode

By turning the function selector to within the adjustment range, the

boiler produces domestic hot water and heating water. The boiler

lights automatically in response to a heat request.

WINTER MODE

The digital display indicates the heating water temperature. The

boiler lights automatically in response to a request for domestic hot

water. The display indicates the domestic hot water temperature.

HEATING WATER

TEMPERATURE

DOMESTIC HOT WATER

TEMPERATURE

Summer mode

By turning the selector to the summer symbol the standard

function of just domestic hot water is activated. The boiler lights

automatically in response to a request for domestic hot water. The

digital display indicates the delivery temperature.

SUMMER MODE

Heating Temperature Control function (C.T.R.)

Turn the heating water temperature selector into sector highlighted

with white markers to activate the C.T.R self-adjusting system:

depending on the temperature set on the ambient thermostat and

the time taken to reach it, the boiler automatically varies the heating

water temperature by reducing operating time, thereby achieving

increased comfort and energy savings.

C.T.R. MODE

D - Adjusting the heating temperature

To adjust the heating water temperature, turn the mode selector to

within the adjustment range (turn clockwise to increase the value

and anticlockwise to reduce the value).

Depending on the type of system, the most suitable temperature

range can be pre-selected:

- standard systems 40-80 °C

- floor installations 20-45°C.

E - Adjusting the heating temperature with

an external probe connected

When an external probe is installed, the delivery temperature

is automatically selected by the system, which quickly adjusts

the ambient temperature according to variations in the outside

temperature. If you want to alter the temperature value (increasing

or reducing the value automatically calculated by the electronic

card), use the heating water temperature selector: turn it clockwise

to increase the temperature, or anticlockwise to reduce it.

The correction possibility is between 15° C and 25° C of comfort (0 =

20° C), shown on the digital display by rotating the knob.

Start Aqua Condens 25 BIS

ENGLISH

F - Adjusting the domestic hot water

temperature

To adjust the domestic water temperature (bathrooms, showers,

kitchen, etc.), turn the knob with the symbol :

- clockwise to increase the value,

- anticlockwise to decrease the value (min. value 37°C - max.

value 60 °C).

The boiler is in standby until the burner switches on following a

heat request.

The boiler will be in function until the heat request is reached,

afterwards it will be in “standby” again.

G - Temporary switch-off

In the event of a temporary absence, weekends, short journeys

and so on:

- turn the mode selector to OFF.

In this way (leaving the electricity and fuel supplies enabled), the

boiler is protected by the following systems:

- antifreeze: when the temperature of the water in the boiler drops

below 5°C the circulator starts and, if necessary, the burner at

minimum output to being the water temperature to safety values

(35°C). During the antifreeze cycle, the symbol appears on the

digital display.

- circulator anti-blocking: an operation cycle is activated every

24 h.

H - Switching off for lengthy periods

If the boiler is not used for a long period, carry out the following

operations:

- turn the mode selector to OFF

- turn the main system switch to “OFF”.

- close the fuel and water taps of the heating and domestic hot

water system

9 In this case, the anti-freeze and anti-blocking systems are

deactivated. Drain the heating and domestic water system if

there is any risk of freezing.

9 The Technical Assistance Centre is at your disposal if you

have any problems carrying out this procedure.

I - Display and fault codes

The operating status of the boiler is shown on the digital display,

below is a list of the types of displays.

BOILER STATUS DISPLAY TYPE OF

ALARM

Off status (OFF) OFF None

Stand-by - Signal

ACF alarm lockout module

A01 Definitive

lockout

ACF electronics fault alarm

Fumes exhaust - air intake

obstruction alarm

Limit thermostat alarm A02 Definitive

lockout

Tacho fan alarm A03 Definitive

lockout

Water pressure switch alarm A04 Definitive

lockout

NTC domestic water fault A06 Signal

NTC heating outlet fault

A07

Temporary

stop

Heating outlet probe

over-temperature

Temporary

then definitive

Outlet/return line probe

differential alarm

Definitive

lockout

NTC heating return line fault

A08

Temporary

stop

Heating return line probe

over-temperature

Temporary

then definitive

Outlet/return line probe

differential alarm

Definitive

lockout

Cleaning the primary

heat exchanger

A09

Signal

NTC flue gases fault

Flue gases probe over-

temperature

Definitive

lockout

Parasite flame A11 Temporary

stop

Low temperature system

thermostat alarm A77 Temporary

stop

Temporary pending ignition 80°C flashing Temporary

stop

Water pressure switch

intervention flashing Temporary

stop

Calibration service ADJ Signal

Calibration installer

Chimney sweep ACO Signal

Vent cycle Signal

External probe presence Signal

Domestic water heat request 60°C Signal

Heating heat request 80°C Signal

Antifreeze heat request Signal

Flame present Signal

Start Aqua Condens 25 BIS

ENGLISH

J - Resetting the faults

To restore operation (reset alarms):

Faults A01-02-03

Turn the mode selector to OFF, wait 5-6 seconds, then return

the selector to the required position.

If the reset attempts do not reactivate the boiler, request the

intervention of the Technical Assistance Centre.

Fault A04

In addition to the fault code, the digital display displays the symbol

Check the pressure value indicated by the water gauge:

if it is less than 0.3 bar, position the function selector on OFF

and adjust the filling tap until the pressure reaches a value between

1 and 1.5 bar.

filling tap

Then turn the mode selector to the required position. The boiler will

carry out a venting cycle lasting about 2 minutes.

If pressure drops are frequent, request the intervention of the

Technical Assistance Centre.

Fault A06

The boiler functions normally but does not guarantee a constant

domestic hot water temperature, which remains set at around 50°C.

The intervention of the Technical Assistance Centre is required.

Fault A07-A 08

Contact the Technical Assistance Centre.

Fault A09

Turn the mode selector to OFF, wait 5-6 seconds, then return

the selector to the required position.

If the reset attempts do not reactivate the boiler, request the

intervention of the Technical Assistance Centre.

Fault A77

The fault is self-resetting, if the boiler does not restart contact the

Technical Assistance Centre.

K - Regular scheduled maintenance

OPERATIONS 1st

YEAR

2nd

YEAR

Inspection of sealing components °°

OPERATIONS 1st

YEAR

2nd

YEAR

Cleaning of the primary heat exchanger flue gases side °°

Cleaning of the combustion chamber,

fan and venturi tubes °°

Checking of the water and gas safety devices °°

Checking the gas output and make any adjustments °°

Checking the draught and flue gases pipe °°

Cleaning of the burner and checking its firing °°

Checking the hydraulic operations ° °

Combustion analysis -°

Checking and lubricating the hydraulic unit components -°

Checking the system seals -°

Washing of the heat exchanger -°

Checking the efficiency of the electric

and electronic components -°

FAN EFFICIENCY (only for vacuum chamber versions) ° °

Checking the condensate discharge system ° °

CHECKING THE CONDENSATE

NEUTRALISER (if installed) ° °

NOTE: the maintenance operations described above, must be

carried out every two years in accordance with regulations in force.

L - Cleaning

The only cleaning operations that we recommend are those

involving the external boiler panels, which should be cleaned using

just a cloth dampened with soap and water.

In the case of stubborn marks, dip the cloth in a mixture of 50%

water and methylated spirits, or use specific products.

0 Do not use fuels and/or sponges soaked in abrasive solutions

or powder detergents.

0 It is forbidden to carry out any cleaning operations before dis-

connecting the boiler from the mains electricity supply; to do

this, turn the main system switch to “off”.

Start Aqua Condens 25 BIS

ENGLISH

TECHNICAL DATA

DESCRIPTION Start Aqua Condens 25 BIS

Fuel G20 G31

Category ● Country of destination II2H3P ● (+)

Type of appliance B23P-B53P-C13,C13x-C33,C33x-C43,C43x-

C53,C53x-C83,C83x-C93,C93x

Heating Heat input kW 25,00

kcal/h 21.500

Maximum heat output (80/60°) kW 24,50

kcal/h 21.070

Maximum heat output (50/30°) kW 26,25

kcal/h 22.575

Minimum heat input kW 6,00

kcal/h 5.160

Minimum heat output (80°/60°) kW 5,89

kcal/h 5.067

Minimum heat output (50°/30°) kW 6,48

kcal/h 5.573

Nominal Range Rated heat output (Qn) kW 25,00

kcal/h 21.500

Minimum Range Rated heat output (Qm) kW 6,00

kcal/h 5.160

DHW Heat input kW 25,00

kcal/h 21.500

Maximum heat output (*) kW 25,00

kcal/h 21.500

Minimum heat input kW 6,00

kcal/h 5.160

Minimum heat output (*) kW 6,00

kcal/h 5.160

(*) average value of various DHW operating conditions

Useful efficiency Pn max - Pn min (80°/60°) % 98,0 - 98,2

Useful efciency 30% (47° return) % 102,3

Combustion performance % 98,1

Useful efficiency Pn max - Pn min (50°/30°) % 105,0 - 108,0

Useful efficiency 30% (30° return) % 107,1

Efciency at average Pn Range Rated (80°/60°) % 98,6

Efciency at average Pn Range Rated (50°/30°) % 105,8

Electric power (CH - DHW) W 89

Pump electric power (1,000 l/h) W 39

Power supply voltage V - Hz 230- 50

Degree of Protection IP X5D

Pressure drops on ue with burner on % 1,86

Pressure drops on ue with burner off % 0,10

Heating operation

Pressure - maximum temperature bar - °C 3 - 90

Minimum pressure for standard operation bar 0,25 - 0,45

Selection eld of heating water temperature °C 20/45 - 40/80

Pump: maximum head available mbar 250

for system capacity l/h 1.000

Membrane expansion tank l 8

Expansion tank pre-charge bar 1

DHW operation

Maximum pressure bar 8

Specific capacity EN13203-1 l/min 14,1

Hot water quantity with ∆t 25°C l/min 14,3

with ∆t 30°C l/min 11,9

with ∆t 35°C l/min 10,2

Selection eld of DHW temperature °C 37-60

Flow regulator l/min 11

Gas pressure

Methane gas nominal pressure (G20) mbar 20

LPG liquid gas nominal pressure (G31) mbar 37

Hydraulic connections

Heating input - output Ø 3/4”

DHW input-output Ø 1/2”

Gas input Ø 3/4”

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Riello START AQUA CONDENS 25 BIS NG Manuel utilisateur

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