ariston microgenus users manual boiler manual · thank you for choosing an ariston boiler. we...

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User’sManual


2

Dear Customer,

Thank you for choosing an ARISTON

boiler.

We guarantee that your boiler is a reliable

and technically sound product.

This User's 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 24 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 User's Manual, the Managementinvites customers to inform

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

G R O U P


3

TABLE OF CONTENTS

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

2. OPERATING INSTRUCTIONS page 83. USEFUL INFORMATION

AND TROUBLESHOOTING page 144. MAINTENANCE page 165. CHANGE OF GAS TYPE page 16

6. TIME CLOCK page 17

IMPORTANT!Please read this manual carefully.For additional information, please consult the “Installation and ServicingInstructions.”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

5

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 25°CFlow rate ∆T 35°CMinimum flow rate

ELECTRICAL DATAElectrical Supply/ FrequencyPower ConsumptionProtection of Electrical System

CATEGORYNominal Pressure/Methane Gas (G20-G25)Nominal Pressure/Liquid Gas (G30-G31)

kWkW%

°Cbar

litres

°Cbar

l/minl/minl/min

V/HzWIP

mbarmbar

25.6-11.023.8-9.7

92.9

82-423-0.7

6

56-368-0.213.69.72.6

230/50140X4D

20-2530-37

23 kW29.8-12.027.8-10.5

93.5

82-423-0.7

6

56-368-0.2

??

2.6

230/50155X4D

20-2530-37

27 kW


6

CONTROL PANEL

23 MI23/27 MFFI


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LEGEND:

A - On/Off knobB - Domestic hot water temperature

adjustment knobC - Central heating selection

(winter) and temperature adjustment knob

D - On/Off L.E.D. (green)E - Fume sensor L.E.D. (yellow)F - Ignition failure (lockout)

L.E.D. (red)G - “Economy/Comfort” mode

selection knobH - Ignition failure (lockout) and/or

overheat reset buttonI - Overheat L.E.D. (red)J - Low system water level

L.E.D. (red)

K - Central heating temperatureL.E.D (yellow)

L - Time clockM - Heating system pressure gauge


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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“M”, make sure that the pressure isbetween 1.0 and 1.5 bar (the bluepart on the gauge) when the systemis off and cool. The warning L.E.D.“L” will indicate if the pressure isbelow the minimum recommended

M


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value. Consult your installer forchecking and refilling the system.

- The outer panels of the unit's 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 boiler exchangers. This willensure that the efficiency of the unitremains the same over time,

reducing gas consumption andmaintenance costs.

- 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

Turn the selector knob “A” to the “J”position. The green L.E.D. “D” will

illuminate indicating that the boiler isready to operate. The centralisedelectronic control unit will ignite theburner, without any manual interventionbut in response to the request fordomestic hot water or heating. If, afterapproximately 10 seconds, the burnerhas not ignited, the boiler safetydevices will shut off the gas and the redL.E.D. “F” illuminates. To reset theignition system, the reset “H” must bepressed and released. Should the

boiler fail to ignite a second time, checkthat the external gas cock is open. If theproblem persists, contact anAuthorised Service Centre.

WINTER AND SUMMER

OPERATING 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.Using the knobs on the control panel,

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FD A

H


the user can select winter or summeroperating mode. Keeping the knob “C”at the “0” position selects the summeroperating mode. Winter operatingmode may be selected by positioningthe knob “C” between the min. andmax. settings.

ADJUSTING THE HEATING

It is possible to set the temperature ofthe heating system by adjusting theknob “C”. By positioning the indicator

somewhere between min. and max., atemperature may be obtained whichvaries from approximately 45˚C toabout 80˚C.

The watertemperature inthe primary circuitmay be checked bymeans of the yellow L.E.D.s“K”.

EXTERNAL (ROOM) THERMOSTAT

CONTROL

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

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C

summer

C

winter

K


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it at max in order toobtain the bestperformance fromthe boiler and toallow the regulationof the externaltemperature tofunction efficiently.

SETTING THE HOT WATER FOR

DOMESTIC USE

Both in the winter and summer mode,the temperature ofthe domestic hotwater may beadjusted by usingthe “B” knob. Ad e l i v e r y

temperature for the water may bechosen in a range from 36˚C to about56˚C, depending on the flow rate of thewater and the position of the knobbetween the min. and max. settings.

ECONOMY/COMFORT MODE

The selector knob“G” allows the userto choose theeconomy mode(position “E”) or thecomfort mode(position “C”).The economy modeis the normal statefor the operation ofthe boiler, since the domestic water isheated up only when a tap is turned on.

C

B

G

eco

no

my

com

fort


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The comfort mode is a specialoperating state, because the watercontained in the secondary exchangerand in the primary exchanger is kept ina preheated condition, thereby allowinga quicker delivery of domestic waterwhen required. The latter is thereforethe more convenient choice.

TURNING OFF CENTRAL HEATING

To turn off the central heating, rotatethe “C” knob to the “0” position.The boiler willstay in summermode, justp r o v i d i n gdomestic wateron request.

TURNING OFF THE BOILER

To turn the boiler off, rotate the selectorknob “A” to the “0” position (OFF); therespective green L.E.D. “D” will go off.Close the gas cock located under theboiler and turn the electricity supplyswitch (located outside the boiler) to

the OFF position.C

A D


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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 IGNITION

FAILURE

In the event thatthe automaticignition of theburner hasfailed, the redL.E.D. “F” will

illuminate. In order to reset the ignition,the button “H” must be pressed andreleased. Should the boiler fail to ignitea second time, check that the externalgas cock is open. If the problempersists, contact an Authorised ServiceCentre.

SHUTDOWN DUE TO OVERHEATING

In the event that the safety limit isexceeded for the temperature of thewater in the boiler’s primary exchanger,the thermostat shuts off the boiler andthe red L.E.D. “J” illuminates.To remedy this situation, wait a fewminutes to allow the exchanger to cooldown, then press and release the resetbutton “H”.If this situation occurs frequently,contact an Authorised Service Centre.F

J

H


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SHUTDOWN DUE TO INSUFFICIENT

WATER CIRCULATION

If the red L.E.D. “L” isilluminated and theboiler is off, onepossible cause for thisstate is an insufficientpressure of water in the system.Check the system pressure on thepressure gauge “M” and if it is lessthan 0.5 bar, consult your installer forchecking and refilling the system.Then turn off and turn back on theboiler by means of the selector knob“A”. If the boiler does not start upagain and the L.E.D. “L” remainsilluminated, contact an AuthorisedService Centre.If there are frequent drops in pressure

within the system, have a plumbercheck the heating system for possiblewater leaks.

TEMPORARY SHUTDOWN DUE TO

DEFECTIVE 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. “E” for a period ofabout 15 minutes.Once this time period has passed andthe discharge state of exhaust fumeshas returned to normal, the boilerautomatically turns back on.

L


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

The boiler is fitted with a device which,in the event that the water temperaturegoes below 5°C, the three-way divertervalve switches to domestic hot waterand the burner turns on at minimumpower until the water in the boiler hasreached a temperature of about 50°C.This device is only activated when theboiler is operating perfectly and- the system pressure is sufficient;- the boiler is powered electrically;- gas is being distributed.

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) orLPG gas. If you need to changeoverfrom one gas to the other, one of ourAuthorised Service Centres should becontacted.

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Do this:- every time you wish to “Reset” time

switch;- to erase all switching times and the

current time of day.

Input time Enter minutes

Manual switch

Enter weekdays

Enter the hour

Weekdays blinks

Reset

Enterswitching time Summer and

winter timesetting

6. TIME CLOCK

The steps marked with the symbol �

are necessary to carry out a switchingprogram.

� PREPARING FOR OPERATION

Activate the “Reset”switch to reset the timeswitch to it’s defaultsetting (activate usinga pencil or similarpointed instrument).

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� ENTER CURRENT TIME AND

WEEKDAY

Keep the “ ” key pressed down.During the summer time period pressthe +/-1h key once.Enter the hour using the “h” key.Enter the minutes using the “m” key.Enter the day using the “Day” key.1 = Mon ....... 7 = Sun

Release the “ ” key.The colon now blinks once a second.

.AM/PM TIME DISPLAY

If you press the “+/-h” and “h” keys atthe same time, the time displayswitches into the AM/PM mode.NOTE: If you keep the “h” and “m” keyspressed down for more than 2 seconds,the display will enter fast forward scrollmode.

� ENTERING THE SWITCHING TIMES

If your entry is incomplete, thesegments not yet selected will blink inthe display.You have 20 memory locationsavailable. Each switching time takes upone memory location.Keep pressing the “Prog” key until afree memory location is shown in thedisplay “-- : --”.


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Program ON or OFF with the “ ” key:“ ” = ON - “ ” = OFF.Enter the hour using “h”; enter theminutes using “m”.If a switching command is to be carriedout every day (1 2 3 4 5 6 7) then storeusing the “ ” key, otherwise selectthe days it is to be carried out on byusing the “Day” key.When the day selection is left blank, theprogrammed switching instructionoperates at the same time every day.

1 2 3 4 5 6 7 Monday..... Sunday

1 2 3 4 5 6 Monday..... Saturday

1 2 3 4 5 Monday ..... Friday

1 2 6 7 Saturday ..... Sunday

1 Monday

..... (selection of single days)

7 Sunday

Store using the “ ” key or push“Prog” key if you are going to continueprogramming. The time switch entersthe automatic operating mode anddisplays the current time of day. Beginany further entry of a switching timewith the “Prog” switch.If necessary, once you have finishedprogramming and have returned to thecurrent time display, by pressing


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the “ ” button, the timer will notautomatically switch to the currentprogrammed status until the next timedsetting. You can put the timer into thecorrect mode with the “ ” key.

= ON

= OFF

AUTOMATIC

OPERATION

The switching timescorrespond to theprogram entered.

= OFF

= ON

MANUAL

OPERATION

If the current switchingmode is changed manually,the next switching time willbe carried out automaticallyagain according to theentered switching program.

= ON

= OFF

CONTINUOUS

OPERATION

[ ]

You can only return toautomatic mode fromthe continuously ON andcontinuously OFFswitching modes bypressing the “ ” key.

ADDITIONAL FUNCTIONS

Switching from summer time to winterand vice versa.Press the “+/-1h” key once.


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MANUAL OVERRIDE KEY

With the “ ” you can change thecurrent switching settings at anytime.The switching program alreadyentered is not altered.

READING THE PROGRAMMED

SWITCHING TIMES

Pressing the “Prog” key displays theprogrammed switching times until thefirst free memory location appears inthe display “ -- : --”.

If youn o wp r e s st h e

“Prog” key once again, the number offree memory locations will bedisplayed, e.g. “Fr 20”. If all memorylocations are occupied, the display “Fr00” appears.

CHANGING THE PROGRAMMED

SWITCHING TIMES

Press the “Prog” key repeatedly untilthe switching time you want to changeis displayed.You can now enter the newdata. See “ENTERING THE SWITCHING

TIMES”.


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NOTES ON STORING SWITCHING TIMES:If you end your entry of the switchingtimes by pressing the “Prog” key, theswitching time you have entered will bestored and the next memory locationdisplayed.Entry of further switching times is alsocarried out as described in “ENTERING

THE SWITCHING TIMES”.In addition, a complete switchingcommand is stored automatically afteraround 90 seconds provided no otherkey is pressed.The time switch then enters theautomatic operating mode and displaysthe current time again.

DELETING INDIVIDUAL SWITCHING TIMES

Press the “Prog” key repeatedly untilthe switching time you wish to delete isshown in the display.Then set to “--” using the “h” or “m”

key and keep the “ ” key presseddown for around 3 seconds.The switching time is now erased andthe current time is displayed.

TECHNICAL DATA

Ambient

temperature: - 10°C to + 55°C

Running

reserve: 5 h (not for 1.5 V DC)

Memory

locations: 20

Shortest

switching time: 1 minute

Programmable: Every minute


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Co

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3998

4136

0000

- B

061

Sta

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Rec

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Manufacturer: Merloni TermoSanitari SpA - Italy

Commercial subsidiary: MTS (GB) LIMITEDMTS BuildingHughenden AvenueHigh WycombeBucks HP13 5FTTelephone: (01494) 755600Fax: (01494) 459775Technical Service Hot Line: (01494) 539579

ariston microgenus users manual boiler manual · thank you for choosing an ariston boiler. we...

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