UsersManual

2

Dear Customer,

Thank you for choosing an ARISTON

boiler.

We guarantee that your boiler is a reliable

and technically sound product.

This Users Manual provides detailed

instructions and recommendations for

proper installation, use and maintenance.

Remember to keep this manual in a safe

place for future reference i.e. by the gas

meter.

Your local MTS Servicing Centre is at your

complete disposal for all requirements.

The guarantee on this appliance isvalid for 12 months from the first

day of installation.

Repairs to the electric, hydraulicor gas circuits may be carried outonly by your local authorised MTS

Servicing Centre.

Every attempt has been made to avoiderrors of any kind

in this Users Manual, the Managementinvites customers to inform

of any inaccuracies which they may find.This will help to improve our service

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TABLE OF CONTENTS

1. GENERAL INFORMATION page 4Technical Information page 5Control Panel page 6

2. OPERATING INSTRUCTIONS page 83. USEFUL INFORMATION

AND TROUBLESHOOTING page 124. MAINTENANCE page 155. CHANGE OF GAS TYPE page 156. TIME CLOCK page 15

IMPORTANT!Please read this manual carefully.For additional information, please consult the “Installation andServicing Instructions.”Make sure to keep the manuals provided with the appliance so that theycan be used by the end-user, installer or our authorised engineer.

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1. GENERAL INFORMATION

MTS (GB) Limited support theinitiative. Your installer will give you, andshow you how to use, a logbook which willgive you important information about yourboiler, and heating system. Please havethis logbook to hand whenever youcontact a service engineer or us.All CORGI Registered Installers carry aCORGI ID card, and have a registrationnumber. Both should be recorded inyour boiler Logbook. You can checkyour installer is CORGI registered bycalling CORGI direct on :- (01256)372300.This is a combined appliance for theproduction of central heating (C.H.) anddomestic hot water (D.H.W.). Thisappliance must be used only for thepurpose for which it is designed. Themanufacturer declines all liability fordamage caused by improper or negligent

use.Do not allow children or inexperiencedpersons to use the appliance withoutsupervision.If you smell gas in the room, do not turnon light switches, use the telephone orany other object which might causesparks.Open doors and windows immediately toventilate the room.Shut the gas mains tap (on the gas meter)or the valve of the gas cylinder and callyour Gas Supplier immediately.If you are going away for a long period oftime, remember to shut the mains gas tapor the gas cylinder valve.

Before any intervention within theboiler it is first necessary to cut off theelectrical power supply by turning theexternal switch to “OFF”.This manual may be kept in the frontpanel of the boiler.

TECHNICAL INFORMATION

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GENERAL DATAHeating input max-minHeating output max-minEfficiency at Maximum Thermal Capacity (seeinstallation instructions)

CENTRAL HEATINGOperating Temperature max-minMaximum-Minimum Heating PressureBuilt-in expansion vessel - Total capacity

DOMESTIC HOT WATERMaximum-Minimum Temperature of Water for Domestic UseWorking pressure max-minFlow rate ∆T 35°CFlow rate ∆T 35°CMinimum flow rate

ELECTRICAL DATAElectrical Supply/ FrequencyPower ConsumptionProtection of Electrical System

CATEGORYNominal Pressure/Methane Gas (G20)Nominal Pressure/Liquid Gas (G30-G31)

kWkW%

°Cbar

litres

°Cbar

l/mingal/minl/min

V/HzWIP

mbarmbar

25.6-11.023.7-9.6

92.5

82-423-0.7

6

54-368-0.29.72.22.5

230/50135X4D

20-2530-37

23 kW

6

CONTROL PANEL

23 MFFI

FR019A

7

LEGEND:

A - On/Off button

B - Central heating temperature adjustment

C - Domestic hot water temperature adjustment

D - Heating system pressure gauge

E - Time clock

F - Central heating selector

G - Central heating L.E.D. (green)

H - Fume sensor L.E.D. (yellow)

I - Overheat and/or ignition failure (lockout) L.E.D. (red)

J - Ignition failure (lockout) and/or overheat reset button

K - ON/OFF L.E.D. (green)

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2. OPERATING INSTRUCTIONSCAUTION

Installation, start-up, adjustmentsand maintenance must be performedby a competent person only, inaccordance with the current GasSafety (Installation & Use)Regulations and the instructionsprovided. Improper installation maycause damage or injury toindividuals, animals and personalproperty, for which the manufacturerwill not be held liable.To ensure efficient and safeoperation it is recommended thatthe boiler is serviced annually by acompetent person.If it is known or suspected that afault exists on the appliance, it mustnot be used until the fault has beencorrected by a competent person.

HELPFUL SUGGESTIONS

To get the most out of your boiler, wehave provided you with some usefuladvice on proper use andmaintenance:- Periodically check the system

pressure using the pressure gauge“D”, make sure that the pressure isat 1.5 bar when the system is off andcool. If the pressure is below theminimum recommended value.Consult your installer for checkingand refilling the system.

D

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- The outer panels of the units casemust only be cleaned with a dampcloth. Do not use abrasive cleaners.The control panel can be wiped witheither a damp or dry cloth. Spraypolishes must not be used on thecontrol panel surface or knobs. Caremust be taken in preventing anyliquid entering the appliance.

PRACTICAL TIPS

- If the water is very hard, it isrecommended that a water softenerbe added to the system so as toreduce the formation of limescale inthe heat exchanger. This will ensurethat the efficiency of the unit remainsthe same over time, reducing gasconsumption and maintenancecosts.

- If the boiler should be out of use fora prolonged period, it isrecommended that the electricalpower supply be disconnected andthat the external gas cock be closed.If low temperatures are expected,the boiler and system pipe workshould be drained in order to preventfrost damage.

- To improve comfort and take fulladvantage of the heat produced bythe boiler, it is recommended that anexternal (room) thermostat beinstalled.

- It is good practice to clean andservice the appliance and centralheating system every year.Call an Authorised Service Centre.

IGNITION PROCEDURE

Press button “A”. The green L.E.D.“K” will illuminateindicating that the boileris ready to operate. Thecentralised electroniccontrol unit will ignite theburner, without anymanual intervention butin response to therequest for domestic hot water orheating. If, after approximately 10seconds, the burner has not ignited, theboiler safety devices will shut off thegas and the red L.E.D.“I” illuminates. To resetthe ignition system, thereset “J” must bepressed and released.Should the boiler fail toignite a second time,

check that the external gas cock isopen. If the problem persists, contactan Authorised Service Centre.

WINTER AND SUMMEROPERATING MODES

In the ‘winter operating mode’, theboiler will produce both central heatingand domestic hot water. In the ‘summeroperating mode’, the boiler will produceonly domestic hot water.Press “F” button toselect winter mode. Thegreen L.E.D. “G” willilluminate.

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K

A

G

F

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J

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ADJUSTING THE HEATING

It is possible to set the temperature ofthe heating system by adjusting theknob “B”.By positioning theindicator somewherebetween 1 and 9, atemperature may beobtained which variesfrom approximately40˚C to about 80˚C.

EXTERNAL (ROOM) THERMOSTATCONTROL

If an external (room) thermostat isinstalled, it is recommended that thetemperature of the heating system beset by means of the “B” knob, leaving

it at 7-8 position in order to obtain thebest performance from the boiler andto allow the regulation of the externaltemperature to function efficiently.

SETTING THE HOT WATER FORDOMESTIC USE

Both in the winter and summer mode,the temperature of the domestic hotwater may be adjusted by using the“C” knob. A deliverytemperature for thewater may be chosen ina range from 36˚C toabout 56˚C, dependingon the flow rate of thewater and the positionof the knob between 1and 9 settings.

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B

C

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TURNING OFF CENTRAL HEATING

To turn off the centralheating, press the “F”button; the respectivegreen L.E.D. “G” will gooff. The boiler will stay insummer mode, onlyproviding domestic wateron request.

TURNING OFF THE BOILERTo turn the boiler off, press the button “A”;the respective green L.E.D.“K” will go off. Close thegas cock located underthe boiler and turn theelectricity supply switch(located outside theboiler) to the OFFposition.

3. USEFUL INFORMATION AND TROUBLESHOOTING

BOILER SHUTDOWN SITUATIONS

The boiler is equipped with safetydevices that intervene in certainsituations and shut it off. Most of thesesituations are communicated by meansof the L.E.D.s and at times the usermay be able to remedy them.

SHUTDOWN DUE TO IGNITIONFAILURE

In the event that the automatic ignitionof the burner has failed, the red L.E.D.“I” will illuminate. In order to reset theignition, the button “J” must bepressed and released. Should theboiler fail to ignite a second time, check

G

F

K

A

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that the external gascock is open. If theproblem persists,contact an AuthorisedService Centre.

SHUTDOWN DUE TO OVERHEATING

In the event that the safety limit isexceeded for the temperature of thewater in the boilers exchanger, thethermostat shuts off theboiler and the red L.E.D.“I” illuminates.To remedy this situation,wait a few minutes toallow the exchanger tocool down, then pressand release the reset

button “J”.If this situation occurs frequently,contact an Authorised Service Centre.

SHUTDOWN DUE TO INSUFFICIENTWATER CIRCULATION

If the boiler is off, one possible causefor this state is an insufficient pressureof water in the system.Check the system pressure on thepressure gauge “D” and if it is lessthan 0.5 bar, consult your installer forchecking and refillingthe system.If the boiler does notstart up again, contactan Authorised ServiceCentre.If there are frequent drops in pressurewithin the system, have a plumber

J

I

D

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J

I

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check the heating system for possiblewater leaks.

TEMPORARY SHUTDOWN DUE TODEFECTIVE DISCHARGE OF

EXHAUST FUMES

The boiler is fitted with safety devices,which in the event of a defectivedischarge of exhaust fumes,automatically interrupts the gas supply,thereby shutting off the boiler.The shut-off of the boiler is temporaryand is indicated by the illumination ofthe yellow L.E.D. “H” for a period ofabout 15 minutes.Once this time periodhas passed and thedischarge state ofexhaust fumes hasreturned to normal, the

boiler automatically turns back on.IMPORTANT!If this situation occurs frequently,contact an Authorised Service Centre.so that they may check that the exhaustfumes are being expelled correctly andthat the area is ventilated properly.

ANTI-FROST DEVICE

If the water temperature goes below3°C, the burner turns on at minimumpower in CH mode until the water in theboiler has reached a temperature ofabout 33°C. This function is onlyactivated when the boiler is operatingperfectly and- the system pressure is sufficient;- the boiler is powered electrically;- gas is being distributed.

H

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4. MAINTENANCE

Schedule an annual maintenancecheck-up for the boiler with acompetent person.Correct maintenance always results insavings in the cost of running thesystem.

5. CHANGE OF GAS TYPE

Our boilers are designed to functioneither with Natural Gas (methane) or LPGgas. If you need to changeover from onegas to the other, one of our AuthorisedService Centres should be contacted.

6. TIME CLOCK

NOTE: the time clock is for centralheating control only.The time clock is provided with 96switches, called riders, each of whichcovers a time interval of 15 minutes(four per hour).When a rider is switched from theinside (off setting) to the outside of the

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clock border (on setting), the circuit isclosed (switch on) for a period of 15minutes and then the boiler starts if theroom thermostat (if installed) or theheating thermostat require heat(heating function on).

EXAMPLETo set the heating of your home inthe time interval from 7.00 am to9.30 am and from 7.00 pm to 10.00pm every day:

- rotate the outer ring of the clock in aclockwise direction until the correcttime of day (24h) lines up with thearrow on the clock (at approx. 2o’clock position);

- under no circumstances should theminute hand be moved manually;

- make sure all the switches, i.e. theriders, are placed on the inside of theclock border;

- pull outward the riders for 7.00 amand 9.30 am, and then all ridersbetween these two;

- repeat this for 7.00 pm and 10.00pm.Other heating intervals may be set inthe same way.The timer has approximately 150hours of battery back up for powerfailure.

The clock is provided with a selectorswitch with three positions (see figure):

1. Position “I” CONSTANT: in thisposition, the clockcircuit is alwaysclosed (switch on),therefore the boilerwill constantly beon and will onlyshut off upon the

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request of the room thermostat (ifinstalled) or the heating thermostat;

2. Position “O”HEATING OFF: inthis position, theclock circuit isalways open(switch off) and theboiler will thereforenever ignite forheating;

3. “Central” PositionPROGRAMMINGACTIVE: in thisposition, theprogramming setby the user isactive.

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TECHNICAL DATA

Ambient

temperature: - 10°C to + 55°C

Running

reserve: 150 h (not for 1.5 V DC)

Shortest

switching time: 15 minutes

Programmable: Every 15 minutes

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3998

4156

7000

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Manufacturer: Merloni TermoSanitari SpA - Italy

Commercial subsidiary: MTS (GB) LIMITEDMTS BuildingHughenden AvenueHigh WycombeBucks HP13 5FT

Telephone: (01494) 755600

Fax: (01494) 459775

Internet: http://www.mtsgb.ltd.uk

E-mail: info@mtsgb.ltd.uk

Technical Service Hot Line: (01494) 539579