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Unical .it AQ Series Instructions For The Installer, Use And Maintenance
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Unical .it AQ Series Instructions For The Installer, Use And Maintenance

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.it AQ
20 - 24 - 28 - 33
INSTRUCTIONS FOR THE INSTALLER, USE
AND MAINTENANCE

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Summary of Contents for Unical .it AQ Series

  • Page 1 .it AQ 20 - 24 - 28 - 33 INSTRUCTIONS FOR THE INSTALLER, USE AND MAINTENANCE...
  • Page 2 Dear Customer, Thank you for having chosen one of our products, the result of many years of experience and of an ongoing quest for higher quality in terms of safety, reliability and performance. In this manual, you will find all the information and useful advice to be able to use your product in the utmost safety and efficiency.
  • Page 3 Standards and declaration of conformity Our company declares that the stove complies with • Changes and repairs not authorised by the manu- the following standards for the European Directive CE facturer; marking. • Use of non-original spare parts; • 2004 /108 EC (EMC directive) as amended; •...
  • Page 4 Instructions for safe and efficient use • The appliance is not intended to be used by • The stove must be electrically connected to a persons (including children) whose physical, sen- system equipped with an earth conductor as re- sory or mental abilities are impaired, or who lack quired by regulations 73/23 EEC and 93/98 EEC;...
  • Page 5 Quality features of the pellets The pellets are tiny cylinders of pressed wood, voiding the warranty and relevant manufacturer produced from sawmill and wood processing liability. residues (chips and sawdust). For our boilers exclusively use 6 mm diameter The pellets, as foreseen by current Italian pellets.
  • Page 6 Dimensions 193,5 128,5 .it AQ T1 flue gas exhaust pipe diameter Diametro tubo scarico fumi T1 T2 air inlet pipe diameter Diametro tubo entrata aria T2 Flow Diameter T3 Diametro andata T3 Diametro Ritorno T4 Return Diameter T4 T5 safety valve discharge carico valvola sicurezza T5 156 90...
  • Page 7 Dimensions .it AQ T1 flue gas exhaust pipe diameter Diametro tubo scarico fumi T1 T2 air inlet pipe diameter Diametro tubo entrata aria T2 Flow Diameter T3 Diametro Mandata T3 Return Diameter T4 Diametro Ritorno T4 T5 safety valve discharge carico valvola sicurezza T5...

  • Page 8: Technical Data

    Technical data Unit of Parameter measure- .it AQ 20 .it AQ 24 .it AQ 28 .it AQ 33 ment Maximum thermal flow rate (nom. - red.) 19.3 - 5.26 23.12 - 5.26 27.34 - 8.95 32.41 - 8.95 Heat output (nom. - red.) 18.22 - 5.08 21.96 - 5.08 25.86 - 8.57...
  • Page 9 Operating site For proper operation and satisfying distribution of the temperature the heat stove must be placed in premises where the air required for pellet combustion may flow (about 40 m /h must be available according to installation regulations and standards in force in the country).
  • Page 10 Operating premises PLEASE NOTE: Distance from objects - the appliance must be installed by a qualified It must be possible to inspect the heat stove from technician possessing technical- all sides, hence a distance of at least 40 cm on professional requirements according...

  • Page 11: Water Connections

    Water connections Suggestions for use Heat stove connection to the plumbing If heat stove installation calls for interaction with system must be SOLELY carried out another pre-existing system including a heating by skilled personnel who are able to appliance (gas boiler, methane boiler, oil fi red perform installation with perfect workmanship boiler etc.) contact qualifi ed personnel who and complying with the provisions in force in...
  • Page 12 Water connections .it AQ 28/33 CAP BLOCKED CAP LOOSENED BY ONE TURN Vent safety The COLD filling pressure of the system must be valve 1 bar. Should the system pressure go below the minimum figure set out above during operation, the User must use the filling cock to bring it back to the initial value.
  • Page 13 Flue gas exhaust connection Connection to an external duct with insulated pipe or double wall In this case only insulated stainless steel pipes (double wall) smooth on the inside must be used (flexible stainless steel pipes are forbidden) fastened to the wall. The base of the external vertical duct must be fitted with an inspection port (“T”...
  • Page 14 Flue gas exhaust connection • The chimney coming out of the roof or in contact with the outside (for example for open lofts) must be covered with bricks and, in any case, well-insulated. • Be built in such a way so that rain, snow or foreign objects do not enter the fl ue and that winds in any direction and inclination do not hinder the exhaust of combustion products...
  • Page 15 Heat stove Cycle On/Off Control panel The upper display will show The button is used to ignite or extinguish the the word “Fan” and the lower heat stove and to quit programming. display the word “Acc”. During The buttons are used to adjust the this stage the appliance will temperature, for programming display and fun- perform a diagnosis (about 20...
  • Page 16 Heat stove Cycle On/Off Manual ignition procedure: • open the door; • strike a match and light the solid fuel inside the • take a cube of solid fuel and place it on the burn burn pot; pot together with a handful of pellets; •...
  • Page 17 Heat stove Cycle On/Off To extinguish the heat stove, do not power supply is restored the heating controller unplug it but let the automatic extinction will expel the residual flue gas, increasing the cycle end: prolonged flue gas exhaust extractor's speed and displaying the words “Cool fan operation is normal and may indicate that the FIRE”.
  • Page 18 Thermostat Operating example: ECO-STOP mode enabled If the room temperature detected by the If this functionality is enabled, upon reaching the thermostat probe (internal or external) is 15° C set temperature the heat stove goes into minimum and the one set on the thermostat is 20 ° C the operation for a certain time T1.
  • Page 19 Chronothermostat The chronothermostat function is used to program UT01: Enable and disable/chronothermostat and automatic cycling on and off of the heat stove set current day. throughout the week. This parameter is used to set the current day of To enter programming hold the button the week or disable programming.

  • Page 20: Remote Control

    Chronothermostat In the example below, the heat stove is lit on with buttons , with 10-minute steps. Saturday and Sunday only. Press button to move to the next parameter. UT07: Select days of the week Press the button to select the days of the Day 2 Day 2 Day 1...

  • Page 21: The Safety Devices

    The safety devices Flue gas pressure switch: it controls the Flue gas temperature probe: this thermocouple pressure in the flue duct. It blocks the pellet detects flue gas temperature and lets operation feeding screw in the event the duct is obstructed or continue or stops the boiler when flue gas there is significant counter-pressure for instance temperature goes below the pre-set figure.
  • Page 22 The safety devices Automatic vent valve: this valve removes the air Safety valve: this valve is triggered to prevent inside the heat stove and the heating system water system overpressure. If the heat stove or system pressure exceeds 2.5 bar it discharges water from the circuit. Pump anti-block function: in the event of Anti-freeze function: if the probe inside the heat prolonged pump inactivity, it is activated at...

  • Page 23: Alarm Signals

    Alarm signals In the event a heat stove operation fault should occur, the system informs the user on the type of fault. The following table summarises the alarms, type of problem and possible solution: Display Display Type of problem Solution Bottom - The heat stove is unable to ignite Fill tank with pellets...
  • Page 24 Electrical device faults Failed ignition The power outlet where the heat stove is If no flame develops during the ignition stage or plugged in must be fitted with "earthing the flue gas temperature does not reach an ade- connection according to regulations in quate level in the time interval set for ignition, the force".
  • Page 25 Heat stove maintenance and cleaning All cleaning operations of all parts must be carried out with stove completely cold and electrical plug disconnected to prevent burns and shocks. The stove requires little main- tenance if it is used with certified and high grade pellets. The required maintenance chan- ges according to the conditions of use (repeated cycling on and off) and to the required performance.
  • Page 26 Heat stove maintenance and cleaning BY THE END USER Exchanger cleaning (with stove off ) Scaling acts as insulation and the thicker it is, the lower the heat conveyed to water and the structure Daily check-up The heat stove needs simple and accurate in general.
  • Page 27 Heat stove maintenance and cleaning Cleaning of stainless and brushed surfaces Check every 7 days These surfaces do not normally require treating, just avoid cleaning them with abrasive materials. Cleaning the lower ash pan It is recommended to clean steel surfaces with a It is recommended to clean the ash pan from paper tissue or a dry and clean cloth moistened residues dropped during operation.
  • Page 28 Heat stove maintenance and cleaning Cleaning the flame breaker Decommissioning The heat stove is fitted with a vermiculite element, When not in use the heat stove must be the flame breaker. disconnected from the power mains. For improved safety, especially in the presence .it AQ 20/24 of children, we recommend removing the power supply cable from the rear.
  • Page 29 Heat stove maintenance and cleaning BY THE SKILLED TECHNICIAN The upper section of the heat exchanger is now free from any encumbrance so it can be cleaned perfectly. Yearly check Once a year it is recommended to also clean the compartment above the exchanger.
  • Page 30 Heat stove maintenance and cleaning Cleaning the surfaces For safety reasons, the frequency with which to clean the flue gas exhaust sy- As the stove is a heating appliance, its outer stem must be established according to surfaces are especially hot. the frequency of stove use.

  • Page 31: Faults And Solutions

    Heat stove maintenance and cleaning Replacing a worn component before it breaks Please follow the following cleaning aids in preventing injury due to accidents caused operations carefully. by sudden breakdown of components. Failure to perform them can cause problems to arise in stove operation. When the heat stove has operated for 1300 hours the bottom display will read Any type of unauthorised tampering or replace-...
  • Page 32 Faults and solutions Faults connected to mechanical or electronic issues FAULT POSSIBLE CAUSES SOLUTIONS 1. The pellet tank is empty 1. Fill pellet tank 2. The feeding screw is locked by 2. Empty the tank and manually release the feeding The pellets are not fed the sawdust screw from the sawdust...
  • Page 33 Faults and solutions 1. Ensure the air intake in the room is present and free. Ensure the combustion air filter on the Ø 5 cm 1. Insufficient combustion air The pellets accumulate pipe for air inlet is not obstructed. Clean the burn pot 2.
  • Page 34 Faults and solutions FAULT POSSIBLE CAUSES SOLUTIONS 1. Adjust the heat stove at a higher temperature. The maximum temperature of the water in the boiler is 1. Incorrect adjustment of basically 65° C and it cannot be set below 40 ° C or Condensate maximum water temperature in above 80°...

  • Page 35: Wiring Diagram

    Wiring diagram 230V mains filter SCAM.
  • Page 36 S.p.A. info@unical-ag.com - export@unical-ag.com - www.unical.eu Unical shall not be held liable for any inaccuracies due to transcription or printing errors. Furthermore, it reserves the right to modify its products as deemed necessary or useful, without affecting their essential features.

This manual is also suitable for:

.it aq 20.it aq 24.it aq 28.it aq 33