Users Manual A/23 MFFI A/27 MFFI
TABLE OF CONTENTS 1) GENERAL INFORMATION 2) OPERATING INSTRUCTIONS 3) TIME CLOCK 4) USEFUL INFORMATION AND TROUBLESHOOTING page 5 page 8 page 11 page 13 IMPORTANT Please read this manual carefully. For additional information, please consult the “Installation and Servicing Instructions.” Please ensure manuals provided are kept with the appliance so that they can be used by the end-user, installer or our authorised engineer. B022 MTS (GB) Limited support the , initiative.
Dear Customer, Thank you for choosing an ARISTON combination boiler. We guarantee that your boiler is a reliable and technically sound product. This User’s Manual provides detailed instructions and recommendations for proper use. Remember to keep this manual in a safe place for future reference. Your local MTS Servicing Centre is at your complete disposal for all requirements. MTS (GB) Limited 4 The guarantee on this appliances is valid for 12 months from the first day of installation.
TECHNICAL INFORMATION GENERAL DATA Heating input max Heating input min Heating output max Heating output min Efficiency at Maximum Thermal Capacity (see installation manual) Efficiency at Reduced Thermal Capacity (*) CENTRAL HEATING Operating Temperature max Operating Temperature min Maximum Heating Pressure Minimum Heating Pressure Built-in expansion vessel - Total capacity DOMESTIC HOT WATER Maximum Temperature of Water for Domestic Use Minimum Temperature of Water for Domestic Use Working pressure max Wo
MODELS A/23 - A/27 MFFI 40° 50° 60° 70° 80° °C 6 °C LEGEND A) B) C) D) E) F) G) H) I) L) O) Ignition Lockout Reset Button/Safety (Overheat)Thermostat Reset Ignition Lockout L.E.D. Selector Knob for Summer/Winter/Flue Analysis Modes Low System Water Level L.E.D. Temperature Adjustment Knob for Domestic Hot Water Heating System Thermometer Safety (Overheat)Thermostat Intervention L.E.D. Adjustment Knob for Heating Temperature On/Off L.E.D.
OPERATING INSTRUCTIONS CAUTION - Installation, start-up, adjustments and maintenance must be performed by a competent person only in accordance with the Gas Safety (Installation & Use) Regulations (1984) and the instructions provided. Improper installation may cause damage or injury to individuals, animals and personal property, for which the manufacturer will not be held liable. To ensure efficient and safe operation it is recommended that the boiler is serviced annually by a competent person.
START-UP PROCEDURE LIGHTING I L Before starting the unit, check the following: - The water pressure on the pressure gauge “O”; - That the gas cock and the inlet for domestic water are open. These models are equipped with electronic ignition which utilises contact ionisation. To make the boiler operational, simply press the On/Off switch “L”. The green L.E.D. “I” will then turn on.
TURNING ON THE BOILER Installation without a room thermostat : - Turn on the power supply to the boiler by pressing the On/Off switch “L”; the green L.E.D. “I” will the turn on; - Turn the “C” selector knob to < I L >; - Regulate the temperature of the water in the boiler by turning the “H” knob. The temperature can vary between 42°C and about 82°C; - Check the boiler temperature on the thermometer with the yellow L.E.D.s “F”.
ADJUSTING THE HEATING TEMPERATURE To economise on consumption while achieving the highest level of comfort, the temperature adjustment knob is designed with three different heating zones based on the temperature outside the home. Rotate the knob “H” as shown below.
SHUTDOWN PROCEDURE After approximately two seconds the following display appears: Weekdays blinks To turn off the main burner, simply press the On/Off switch “L”; the green L.E.D. “I” will also turn off. As a precautionary measure, it is recommended that the gas cock located on the bottom of the boiler be turned off as well. I L Input time Enter minutes Enter the hour Manual switch Enter switching time TIME CLOCK The steps marked with the symbol are necessary to carry out a switching program.
The colon now blinks once a second. AM/PM TIME DISPLAY If you press the “+/-h” and “h” keys as the same time, the time display switches into the AM/PM mode. Notes: If you keep the “h” and “m” keys pressed down for more than 2 seconds, the display will enter fast forward scroll mode. ENTERING THE SWITCHING TIMES If your entry is incomplete, the segments not yet selected will blink in the display. You have 20 memory locations available. Each switching time takes up one memory location.
ADDITIONAL FUNCTIONS READING THE PROGRAMMED SWITCHING TIMES Pressing the “Prog” key displays the programmed switching times until the first free memory location appears in the display “ -- : --”. Switching from summer time to winter and vice versa. Press the “+/-1h” key once. MANUAL OVERRIDE KEY With the “ ” you can change the current switching settings at any time. The switching program already entered is not altered.
Notes on storing switching times: If you end your entry of the switching times by pressing the “Prog” key, the switching time you have entered will be stored and the next memory location displayed. Entry of further switching times is also carried out as described in “Entering the switching times”. In addition, a complete switching command is stored automatically after around 90 seconds provided no other key is pressed.
SHUTDOWN DUE TO OVERHEATING This anomaly is signalled by the red “G” L.E.D. The boiler shuts off because the safety thermostat detected that the boiler temperature has reached the temperature limit. To reset the unit, wait until the boiler has cooled and then press the “A” button. If the safety thermostat shuts off the unit on a frequent basis, contact one of our Authorised Service Centres for assistance.
GROUP Manufacturer: Merloni TermoSanitari SpA - Italy Commercial subsidiary: MTS (GB) LIMITED MTS Building Hughenden Avenue High Wycombe Bucks 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 Cod.
