Innovens EN Wall-hung gas condensing boilers MCA 25/28 BIC User Guide 300022162-001-01
Contents 1 Introduction ................................................................................................4 1.1 Symbols used .......................................................4 1.2 Abbreviations ........................................................4 1.3 General ..................................................................5 1.3.1 1.3.2 1.3.3 1.4 2 3 Certifications .........................................................6 Safety instructions and recommendations .........
Contents 5 6 7 4.4 Installation shutdown .........................................24 4.5 Frost protection ..................................................24 Checking and maintenance .....................................................................26 5.1 General instructions ...........................................26 5.2 Periodic checks ..................................................26 5.3 Filling the system ...............................................27 5.
3 15/06/12 - 300022162-001-01
1. Introduction MCA 25/28 BIC 1 Introduction 1.1 Symbols used In these instructions, various danger levels are employed to draw the user's attention to particular information. In so doing, we wish to safeguard the user's safety, obviate hazards and guarantee correct operation of the appliance. DANGER Risk of a dangerous situation causing serious physical injury. WARNING Risk of a dangerous situation causing slight physical injury. CAUTION Risk of material damage. Signals important information.
MCA 25/28 BIC 1. Introduction 1.3 General 1.3.1. Manufacturer's liability Our products are manufactured in compliance with the requirements of the various applicable European Directives. They are therefore delivered with [ marking and all relevant documentation. In the interest of customers, we are continuously endeavouring to make improvements in product quality. All the specifications stated in this document are therefore subject to change without notice.
MCA 25/28 BIC 1. Introduction This appliance is not intended to be used by persons (including children) whose physcial, sensory or mental capacity is impaired or persons with no experience or knowledge, unless they have the benefit, through the intermediary of a person responsible for their safety, of supervision or prior instructions regarding use of the appliance. Care should be taken to ensure that children do not play with the appliance. 1.
2. Safety instructions and recommendations MCA 25/28 BIC 2 Safety instructions and recommendations 2.1 Safety instructions DANGER If you smell gas: 1. 2. 3. 4. 5. Do not use a naked flame, do not smoke, do not operate electrical contacts or switches ( doorbell, light, motor, lift, etc..). Shut off the gas supply. Open the windows. Evacuate the premises. Call your fitter. DANGER If you smell flue gases: 1. 2. 3. 4. Switch the appliance off. Open the windows. Evacuate the premises. Call your fitter.
MCA 25/28 BIC 2.2 2. Safety instructions and recommendations Recommendations WARNING Only qualified professionals are authorised to work on the appliance and the installation. 4 Regularly check the water pressure in the installation (minimum pressure 0,8 bar, recommended pressure between 1,5 and 2,0 bar). 4 Keep the appliance accessible at all times. 4 Never remove or cover labels and rating plates affixed to the appliance.
MCA 25/28 BIC 3. Description 3 Description 3.1 Operating principle 3.1.1. Gas/air setting The casing fitted to the boiler is also used as an air box. Air is sucked in by the fan and gas injected into the venturi by the fan intake. The fan rotation speed is set according to the settings parameters, the thermal energy requirement and the temperatures measured by the temperature sensors. The gas and air are mixed in the venturi.
MCA 25/28 BIC 3.2 3.
3. Description 3.3 MCA 25/28 BIC Control panel Description of the keys A000866-A 3.3.1.
MCA 25/28 BIC 3. Description 3.3.2.
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MCA 25/28 BIC 3. Description n System pressure bar 0 2 4 6 8 10 12 14 16 18 20 22 24 bar r j l M C002708-A p b AUTO x c g m t STD Pressure indicator: The symbol is displayed when a water pressure sensor is connected. 4 Flashing symbol: The water pressure is insufficient. 4 Steady symbol: The water pressure is sufficient.
3. Description MCA 25/28 BIC 3.3.3. 0 4 6 8 10 12 14 16 #MEASURES #CHOICE TIME PROG. #TIME PROGRAM #SETTING c #TIME .DAY r v bar 2 18 20 22 24 a 1 2 1 2 p b AUTO x c g m ( ' r j Browsing in the menus 1. To select the desired menu, turn the rotary button. 2. To access the menu, press the rotary button. To go back to the previous display, press the key j. L t STD C002220-B-04 0 2 4 6 8 10 12 14 16 18 20 CURRENT PROG.B CURRENT PROG.
MCA 25/28 BIC 4. Operating the boiler 4 Operating the boiler 4.1 Commissioning the boiler 1. Check the water pressure in the installation shown on the control panel display. If the water pressure is lower than 0,8 bar, more water should be added. If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2,0 bar). ¼ See chapter: "Filling the system", page 27 2. Open the gas valve on the boiler. 3. Turn on the boiler using the on/off switch.
4. Operating the boiler MCA 25/28 BIC User level - Menu #MEASURES Parameter Description Unit OUTSIDE TEMP. Outside temperature °C ROOMTEMP. A (1) Room temperature of circuit A °C ROOMTEMP. B (1) Room temperature of circuit B °C (1) Room temperature of circuit C °C BOILER TEMP. Water temperature in the boiler °C PRESSURE Water pressure in the installation bar Water temperature in the DHW tank °C Instant hot water temperature °C Water temperature in the storage tank °C ROOMTEMP.
MCA 25/28 BIC 4.3 4. Operating the boiler Changing the settings 4.3.1. Setting the set point temperatures To set the various heating, DHW and swimming pool temperatures, proceed as follows: 1. Press the C key. 2. To select the desired parameter, turn the rotary button. 3. To modify the parameter, press the rotary button. To go back to the previous display, press the key j. 4. To modify the parameter, turn the rotary button. 5. To confirm, press the rotary button. MODE To cancel, press key h.
4. Operating the boiler MCA 25/28 BIC 4.3.2. Selecting the operating mode To select an operating mode, proceed as follows: 1. Press the MODE key. 2. To select the desired parameter, turn the rotary button. 3. To modify the parameter, press the rotary button. To go back to the previous display, press the key j. 4. To modify the parameter, turn the rotary button. 5. To confirm, press the rotary button. MODE To cancel, press key h.
MCA 25/28 BIC 4. Operating the boiler 4.3.3. Forcing domestic hot water production To force domestic hot water production, proceed as follows: 1. Press the r key. 2. To select the desired parameter, turn the rotary button. 3. To modify the parameter, press the rotary button. To go back to the previous display, press the key j. 4. To modify the parameter, turn the rotary button. 5. To confirm, press the rotary button. MODE To cancel, press key h.
MCA 25/28 BIC 4. Operating the boiler 4.3.5. Setting the time and date 1. To access user level: Press the > key. 0 2 4 6 8 10 12 14 16 18 20 22 24 2. Select the menu #TIME .DAY. SUNDAY 11:45 v bar c Turn the rotary button to scroll through the menus or modify a value. 4 Press the rotary button to access the selected menu or confirm a value modification. ¼ For a detailed explanation of menu browsing, refer to the chapter: "Browsing in the menus", page 15.
4. Operating the boiler MCA 25/28 BIC User level - Menu #CHOICE TIME PROG. Parameter Adjustment range Description CURRENT PROG.A P1 / P2 / P3 / P4 Comfort programme activated (Circuit A) CURRENT PROG.B P1 / P2 / P3 / P4 Comfort programme activated (Circuit B) CURRENT PROG.C P1 / P2 / P3 / P4 Comfort programme activated (Circuit C) 4.3.7. Customising a timer programme 1. To access user level: Press the > key. 0 2 4 6 8 10 12 14 16 18 20 22 2. Select the menu #TIME PROGRAM.
4. Operating the boiler 0 v bar c 1 2 1 2 2 4 6 8 10 12 MCA 25/28 BIC 14 16 18 PROG P2 C Mo Tu We Th Fr "Select the days to program" r p b AUTO x c g m ( ' r 20 Sa j 22 24 a Su L t STD 6. b : Day selection Press key b / v until the symbol b is displayed. Turn the rotary button to the right to select the day(s) desired. v : Cancelling the day selection Press key b / v until the symbol v is displayed.
4. Operating the boiler MCA 25/28 BIC User level - Menu #TIME PROGRAM Day Comfort periods / Filling enabled: P1 P2 _______________ P3 _______________ P4 _______________ _______________ TIME PROG.DHW Monday Tuesday Wednesday Thursday Friday Saturday Sunday TIME PROG.AUX Monday Tuesday Wednesday Thursday Friday Saturday Sunday 4.4 Installation shutdown CAUTION Do not switch off the mains supply to the appliance.
4. Operating the boiler MCA 25/28 BIC CAUTION 4 4 The antifreeze protection does not function if the appliance is switched off. The integrated protection system only protects the boiler, not the installation. To protect the installation, set the appliance to HOLIDAYS mode. The HOLIDAYS mode protects: 4 The installation if the outside temperature is lower than 3°C (factory setting). 4 The room temperature if a remote control is connected and the room temperature is lower than 6 °C (factory setting).
MCA 25/28 BIC 5. Checking and maintenance 5 Checking and maintenance 5.1 General instructions The boiler does not require a lot of maintenance. Nevertheless, we recommend having the boiler inspected and serviced at regular intervals. 4 Maintenance and cleaning of the boiler must be carried out at least once a year by a qualified technician. 4 Have the flues swept at least once a year or more, depending on the regulations in force in your country.
5. Checking and maintenance MCA 25/28 BIC 4 Carry out a visual check for the presence of any water leaks. T001507-B 4 Open and close the radiator valves several times a year (this prevents the valves from seizing up). 4 Clean the outside of the boiler using a damp cloth and a light detergent. 1 2 CAUTION 3 4 T000181-B 5.3 Only a qualified professional is authorised to clean the inside of the boiler. Filling the system 1.
MCA 25/28 BIC 5. Checking and maintenance 5. Open the cold water inlet and heating outlet valves. T001620-A 6. Open the disconnector valves. 2 1 T001618-A 7. Close the disconnector valves when the manometer indicates a pressure of 2 bar. 2 bar When water is added, air gets into the heating system. Degas the installation. After the air has been vented, the water pressure can drop below the required level. Check the water pressure in the heating system.
5. Checking and maintenance 5.4 MCA 25/28 BIC Bleeding the heating system It is essential that you bleed any air in the calorifier, the conduits or the taps to prevent the annoying noises likely to be produced during heating or when tapping water. To do this, proceed as follows: 1. Open the valves on all radiators connected to the heating system. 1 2 3 4 T000181-B 2. Set the heating set point to as high a temperature as possible. 3. Wait until the radiators are hot. T000184-A 4.
MCA 25/28 BIC 5. Checking and maintenance 7. Open the bleed connection using the bleed key provided whilst keeping a rag pressed against the connection. T000217-A 8. Wait until water comes out of the bleed valve and then close the bleed connection. CAUTION The water may still be hot. 9. Switch on the boiler. A vent cycle of a duration of around 3 minutes is carried out automatically. 10.After venting, check whether the pressure in the installation is still sufficient.
5. Checking and maintenance 5.5 MCA 25/28 BIC Draining the installation It may become necessary to empty the water from the heating system when the radiators have to be replaced, should there be a major water leak or a risk of frost. To do this, proceed as follows: 1. Open the valves on all radiators connected to the heating system. 1 2 3 4 T000181-B 2. Switch off the boiler electrical power supply. 3. Wait around 10 minutes until the radiators are cold. T000185-A 4.
MCA 25/28 BIC 6. Troubleshooting 6 Troubleshooting 6.1 Anti-hunting When the boiler is in Anti-short-cycle operating mode, the symbol ? flashes. 1. Press the "?" key. The message Operation assured when the restart temperature will be reached is displayed. This message is not an error message but an item of information. 6.2 Messages (Code type Bxx or Mxx) In the case of failure, the control panel displays a message and a corresponding code. 1. Make a note of the code displayed.
6. Troubleshooting MCA 25/28 BIC Code Messages Description Checking / solution B08 The RL inlet on the PCU PCB terminal block is open Parameter error BL.
6. Troubleshooting MCA 25/28 BIC Code Messages Description B27 BL.DHW INST The sensor on the plate 4 exchanger outlet is disconnected or short circuited Checking / solution M04 REVISION A service is required M05 REVISION A If the symbol ? flashes, press key ?. The installer's contact details are displayed.
6. Troubleshooting 0 2 4 6 MCA 25/28 BIC 8 10 12 14 16 18 20 22 3. Press the ? key. Follow the instructions displayed to solve the problem. 4. Consult the meaning of the codes in the table below: 24 SUNDAY 11:45 v bar c 1 TEMP. : 68° 2 1 2 r PCU COM.
MCA 25/28 BIC 6. Troubleshooting Code Faults Cause of the fault Description L07 PCU The return temperature sensor is on Bad connection an open circuit Sensor fault BACK S.FAILURE Checking / solution Contact the professional who takes care of maintenance of the appliance Bad connection Sensor fault 4 L08 BACK S.
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MCA 25/28 BIC 6. Troubleshooting Code Faults Cause of the fault Description Checking / solution L40 PCU HRU/URC unit test error Bad connection External cause Parameter incorrectly set TEST.HRU.FAIL Contact the professional who takes care of maintenance of the appliance Hydraulic circuit incorrectly vented Water leak Measurement error 4 L250 DEF.WATER MIS.
6. Troubleshooting MCA 25/28 BIC Code Faults Cause of the fault Description Checking / solution D15 ST.TANK S.FAIL SCU D16 D16 SWIM.P.B. S.FAIL SWIM.P.C. S.FAIL SCU Storage tank sensor fault Bad connection Sensor fault Note: The hot water storage tank reheating 4 Contact the professional who takes care of operation is no longer assured.
MCA 25/28 BIC 7. Technical specifications 7 Technical specifications 7.
MCA 25/28 BIC 8. Energy savings 8 Energy savings 8.1 Energy-saving advice 4 Keep the room in which the boiler is installed well ventilated. 4 Do not block ventilation outlets. 4 Do not cover the radiators. Do not hang curtains in front of the radiators. 4 Install reflective panels behind the radiators to prevent heat losses. 4 Insulate the pipes in rooms that are not heated (cellars and lofts). 4 Close the radiators in rooms not in use. 4 Do not run hot (or cold) water pointlessly.
9. Warranty MCA 25/28 BIC 9 Warranty 9.1 General You have just purchased one of our appliances and we thank you for the trust you have placed in our products. Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained. Your fitter and our customer support network are at your disposal at all times. 9.
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