DeDietrich Innovens MCA 35 Installation And Service Manual
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DeDietrich Innovens MCA 35 Installation And Service Manual

Wall-hung gas condensing boilers
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Innovens
Wall-hung gas condensing boilers
MCA 35
300022160-001-01
Installation and
Service Manual
EN

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Summary of Contents for DeDietrich Innovens MCA 35

  • Page 1 Innovens Wall-hung gas condensing boilers MCA 35 Installation and Service Manual 300022160-001-01...
  • Page 2 EG declaration of conformity The device complies with the standard type described in the EG declaration of conformity. It was manufactured and commissioned in accordance with European directives. The original of the declaration of compliance is available from the manufacturer. EG - VERKLARING VAN OVEREENSTEMMING EC - DECLARATION OF CONFORMITY EG - KONFORMITÄTSERKLÄRUNG...

  • Page 3: Table Of Contents

    Contents Introduction ....................6 Symbols used ............6 Abbreviations ............6 General ..............7 1.3.1 Manufacturer's liability ..........7 1.3.2 Installer's liability .............7 Homologations ............7 1.4.1 Certifications ............7 1.4.2 Equipment categories ..........8 1.4.3 Additional Directives ..........8 1.4.4 Factory test .............8 Safety instructions and recommendations ..........9 Safety instructions ..........9 Recommendations ..........9 Technical description ................11...
  • Page 4 Contents Installing the mounting frame ......19 Positioning the boiler .........19 Hydraulic connections ........20 4.6.1 Flushing the system ..........20 4.6.2 Connection of the heating circuit ......21 4.6.3 Connecting the expansion vessel ......22 4.6.4 Connecting the condensate discharge pipe ..22 Gas connection ...........23 Flue gas system connections ......24 4.8.1 Classification ............24...
  • Page 5 Commissioning the boiler ........64 Gas settings ............65 5.4.1 Adapting to another gas type ........65 5.4.2 Setting the air/gas ratio (Full load) ......66 5.4.3 Setting the air/gas ratio (Part load) ......67 5.4.4 Basic setting for the gas/air ratio ......69 Checks and adjustments after commissioning ...........69 5.5.1 Displaying the parameters in extended...
  • Page 6 Contents Specific maintenance operations ....100 7.5.1 Replacing the ionization/ignition electrode ..100 7.5.2 Replacing the 3-way valve ........101 7.5.3 Replacing the non-return valve ......102 7.5.4 Assembling the boiler ..........103 Troubleshooting ..................104 Anti-hunting ............104 Messages (Code type Bxx or Mxx) ....104 Message history ..........107 Faults (Code type Lxx or Dxx) ......107 8.4.1 Deletion of sensors from the memory in the...
  • Page 7 15/06/12 - 300022160-001-01...

  • Page 8: Introduction

    1. Introduction MCA 35 Introduction 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.

  • Page 9: General

    MCA 35 1. Introduction 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.

  • Page 10: Equipment Categories

    1. Introduction MCA 35 1.4.2. Equipment categories Gas category Gas type Connection pressure (mbar) Natural gas H (G20) 20 2ESi3P Natural gas L (G25) 25 Propane (G31) The boiler is preset in the factory to operate on natural gas H (G20). ¼...

  • Page 11: Safety Instructions And Recommendations

    MCA 35 2. Safety instructions and recommendations Safety instructions and recommendations Safety instructions DANGER If you smell gas: 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.
  • Page 12 2. Safety instructions and recommendations MCA 35 Only remove the casing for maintenance and repair operations. Put the casing back in place after maintenance and repair operations. Instructions stickers The instructions and warnings affixed to the appliance must never be removed or covered and must remain legible during the entire lifespan of the appliance.

  • Page 13: Technical Description

    MCA 35 3. Technical description Technical description General description Wall-hung gas condensing boilers 4 High efficiency heating. 4 Low pollutant emissions. 4 Top of the range electronic DIEMATIC iSystem control panel 4 Installation and connection facilitated by the mounting frame delivered with the appliance.

  • Page 14: Operating Principle

    3. Technical description MCA 35 Operating principle 3.3.1. Skeleton Diagrams Heat exchanger (Heating circuit) Heating flow Heating flow (Secondary circuit) Heating return (Secondary circuit) Heating return 3-way valve Shunt pump (Heating circuit) T002885-A 3.3.2. Shunt pump The boiler is equipped with a circulating pump. This energy-efficient, modulating circulating pump is controlled by the control unit based on ΔT.

  • Page 15: Water Flow Rate

    MCA 35 3. Technical description 3.3.3. Water flow rate The boiler's modulating control system limits the maximum difference in temperature between the heating flow and return and the maximum speed at which the flow temperature increases. In this way, the boiler does not require a minimum water flow rate.

  • Page 16: Sensor Characteristics

    3. Technical description MCA 35 Boiler type MCA 35 Manometric height central heating circuit (∆T = 20K) mbar Electrical characteristics Power supply voltage maximum Power consumption - Full load Factory setting Power consumption - Part load maximum Power consumption - Standby maximum Electrical protection index IPX4D...

  • Page 17: Installation

    MCA 35 4. Installation Installation Regulations governing installation WARNING Installation of the appliance must be done by a qualified engineer in accordance with prevailing local and national regulations. Package list 4.2.1. Standard delivery The delivery includes: 4 The boiler, fitted with a connection cable 4 Mounting frame 4 Mounting template 4 Connection kit...

  • Page 18: Choice Of The Location

    4. Installation MCA 35 Boiler options Control system options Description package Description package DHW tank SR130 EE22 Room sensor FM52 Kit for connection between MCA and SR130 EA137 Choice of the location 4.3.1. Data plate The data plate located on top of the boiler provides important information on the appliance: serial number, model, gas category, etc.

  • Page 19: Location Of The Boiler

    MCA 35 4. Installation 4.3.2. Location of the boiler 4 Before mounting the boiler, decide on the ideal position for mounting, bearing the Directives and the dimensions of the appliance in mind. 4 When choosing the position for mounting the boiler, bear in mind the authorised position of the combustion gas discharge outlets and the air intake opening.

  • Page 20: Main Dimensions

    4. Installation MCA 35 4.3.4. Main dimensions 257,5 T001116-B Connection of the combustion gas exhaust pipe Ø 60 mm Connection of the air intake pipe Ø 100 mm ê Safety valve outlet pipe Ø 25 mm Condensates discharge Ø 25 mm Heating circuit return (Primary circuit) G¾"...

  • Page 21: Installing The Mounting Frame

    MCA 35 4. Installation Installing the mounting frame The boiler is delivered with a mounting template. 1. Position the mounting template to the wall with adhesive tape. CAUTION Using a spirit level, check that the mounting axis is perfectly horizontal. 2.

  • Page 22: Hydraulic Connections

    4. Installation MCA 35 2. Fit a fibre gasket to each joint on the valve plate. T001627-A 3. Position the boiler above the plumbing fixtures plate and locate it against the mounting frame. Gently lower the boiler. 4. Tighten the valve nuts on the boiler. T001872-A Hydraulic connections 4.6.1.

  • Page 23: Connection Of The Heating Circuit

    MCA 35 4. Installation 4 Flush the installation. 4 Clean the installation with a universal cleaner to eliminate debris from the appliance (copper, hemp, flux). 4 Thoroughly flush the installation until the water runs clear and shows no impurities. 4.6.2. Connection of the heating circuit n Primary circuit Connection by internal brazing ∅...

  • Page 24: Connecting The Expansion Vessel

    4. Installation MCA 35 n Secondary circuit Connection by internal brazing ∅ 16mm Connection by internal brazing ∅ 16mm 1. Connect the heating water outlet pipe to the heating flow connection. 2. Connect the heating water return pipe to the heating return connection.

  • Page 25: Gas Connection

    MCA 35 4. Installation Gas connection The diameters of the pipes must be defined in accordance with the standards in force in your country. Connection by internal brazing ∅ 18 mm 1. Connect the gas inlet pipe. WARNING Close the main gas valve before starting work on the gas pipes.

  • Page 26: Flue Gas System Connections

    4. Installation MCA 35 Flue gas system connections 4.8.1. Classification B 33 C 83(x) C 33(x) C 43(x) C 83(x) C 43(x) B 23P B 33 C 33(x) C 13(x) C 83(x) B 23P C 93(x) C 33(x) C 43(x) C 53 C 93(x) C002339-C...

  • Page 27: Lengths Of The Air/Flue Gas Pipes

    MCA 35 4. Installation Configuration C 93(x) Air/flue gas connection by concentric pipes in the boiler room and single pipes in the chimney (combustive air in counter current in the chimney) Configuration C 93(x) Air/flue gas connection by concentric pipes in the boiler room and single flex in the chimney (combustive air in counter current in the chimney) WARNING...

  • Page 28: Additional Directives

    4. Installation MCA 35 WARNING Maximum length = lengths of the straight air/flue gas ducts + equivalent lengths of other components The max length in the flue gas pipe (configurations C ) of the elbow bracket at the outlet must not exceed: 4 30 m for rigid PPS 4 25 m for flexible PPS If longer lengths are used, holding clamps must be added per sections...

  • Page 29: Installing The Outside Sensor

    MCA 35 4. Installation Installing the outside sensor 4.9.1. Choice of the location It is important to select a place that allows the sensor to measure the outside conditions correctly and effectively. Advised positions: 4 on one face of the area to be heated, on the north if possible 4 half way up the wall in the room to be heated 4 under the influence of meteorological variations 4 protected from direct sunlight...

  • Page 30: 4.10 Electrical Connections

    4. Installation MCA 35 Inserts Ø4 wood screw ¼ For the connection of the outside temperature sensor, refer to the chapter "Electrical Connections". 8800N003-C 4.10 Electrical connections 4.10.1. Control unit The boiler is fully pre-wired. The mains supply is made via the cable C connected to the mains.

  • Page 31: Recommendations

    MCA 35 4. Installation 4.10.2. Recommendations WARNING Only qualified professionnals may carry out electrical connections, always with the power off. The boiler is entirely pre-wired. Do not modify the connections inside the control panel. Earth the appliance before making any electrical connections.

  • Page 32: Position Of The Pcbs

    4. Installation MCA 35 4.10.3. Position of the PCBs TS + On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B C002299-F Do not connect anything to the terminal block.

  • Page 33: Accessing The Connection Terminal Blocks

    MCA 35 4. Installation 4.10.4. Accessing the connection terminal blocks To access the connection terminal blocks, proceed as follows: 1. Unscrew the 2 screws under the front panel by a quarter turn. 2. Remove the front panel. C002325-C 3. Open the holding clips located on the sides. 4.
  • Page 34 4. Installation MCA 35 5. Lift the clip located in front of the control panel. 6. Lift the control panel cover. C002327-B 7. Unclip the PCB cover. C002330-C 15/06/12 - 300022160-001-01...

  • Page 35: Connecting A Direct Heating Circuit

    MCA 35 4. Installation 4.10.5. Connecting a direct heating circuit On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B C002304-M Do not connect anything to the terminal block.

  • Page 36: Connecting A Direct Heating Circuit And A Domestic Hot Water Tank

    4. Installation MCA 35 4.10.6. Connecting a direct heating circuit and a domestic hot water tank On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B...
  • Page 37 MCA 35 4. Installation Connect the DHW tank anode. CAUTION If the tank is fitted with a Titan Active System® impressed current anode, connect the anode to the inlet (+ TA on the anode, - on the tank). If the tank is not fitted with an impressed current anode, put the simulation connector in place (delivered with the DHW sensor - package AD212).

  • Page 38: Connecting Two Circuits And A Domestic Hot Water Tank

    4. Installation MCA 35 4.10.7. Connecting two circuits and a domestic hot water tank n Domestic hot water tank before the pressure release header TS + On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS...
  • Page 39 MCA 35 4. Installation Connect a safety thermostat if the heating circuit is for underfloor heating. Remove the bridge. Connect the wires from the safety thermostat to the connector. Connecting an additional circuit to the AD249 option. Connect the heating pump (circuit A). If underfloor heating is being used, put a safety thermostat in place after the heating pump.
  • Page 40 4. Installation MCA 35 n Domestic hot water tank after the low-loss header TS + On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B...

  • Page 41: Hot Water Storage Tank Connection

    MCA 35 4. Installation Connect the DHW tank anode. CAUTION If the tank is fitted with a Titan Active System® impressed current anode, connect the anode to the inlet (+ TA on the anode, - on the tank). If the tank is not fitted with an impressed current anode, put the simulation connector in place (delivered with the DHW sensor - package AD212).
  • Page 42 4. Installation MCA 35 On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B C002368-H Do not connect anything to the terminal block.
  • Page 43 MCA 35 4. Installation Install the expansion vessel on the heating return pipe ¼ See chapter: "Connecting the expansion vessel", page 22 Settings to be made for this type of installation Parameters Access Settings to be made See chapter ¼ "Displaying the parameters in extended mode", page INSTALLATION Installer level EXTENDED #SYSTEM menu...
  • Page 44 4. Installation MCA 35 n PS type storage tank and DHW tank loaded by the boiler On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B...
  • Page 45 MCA 35 4. Installation Do not connect anything to the terminal block. Install the expansion vessel on the heating return pipe ¼ See chapter: "Connecting the expansion vessel", page 22 Settings to be made for this type of installation Parameters Access Settings to be made See chapter ¼...
  • Page 46 4. Installation MCA 35 On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B C002369-F Do not connect anything to the terminal block.

  • Page 47: Pool Connection

    MCA 35 4. Installation Install the expansion vessel on the heating return pipe ¼ See chapter: "Connecting the expansion vessel", page 22 Settings to be made for this type of installation Parameters Access Settings to be made See chapter ¼ "Displaying the parameters in extended mode", page INSTALLATION Installer level EXTENDED #SYSTEM menu...
  • Page 48 4. Installation MCA 35 Connect the swimming pool sensor. Plate heat exchanger. Pool heating cut-off control When the parameter I.TEL: is on 0/1 B, the swimming pool is no longer heated when the contact is open (factory setting), only the antifreeze continues to be active.

  • Page 49: Connecting A Mixed Tank

    MCA 35 4. Installation The swimming pool can also be connected to circuit C by adding the AD249 option: Make the connection to the terminal blocks marked Set the parameters for circuit C. n Hourly programming of the secondary circuit pump The secondary pump operates during programme B comfort periods in summer and winter alike.

  • Page 50: Connecting The Options

    4. Installation MCA 35 Option of connecting the electric tank (with AD249 option) or to E Outlet circuit A - Option of connecting the electric tank (or to Z) Power control relay to the electrical resistor Connect the DHW tank anode. If the tank is not fitted with an impressed current anode, put the simulation connector in place (delivered with the DHW sensor - package...
  • Page 51 MCA 35 4. Installation TS + On/off 0-10V S AMB C S AMB B S AMB A Tout Tdhw 4 3 2 1 2 1 TS + S SYST + TA - S ECS S EXT S DEP C S DEP B MODE TELCOM 2 MODE...

  • Page 52: Connection In Cascade

    4. Installation MCA 35 4.10.12. Connection in cascade n DHW tank after the mixing tank C002435-C Master boiler Secondary boiler Secondary boiler D.H.W. load pump Connect the DHW sensor (Package AD212) Cable BUS Low loss header Cascade outlet sensor Connect the sensor to the terminal block S SYST on the master boiler.
  • Page 53 MCA 35 4. Installation Install the expansion vessel on the heating return pipe ¼ See chapter: "Connecting the expansion vessel", page 22 Settings to be made for this type of installation: Master boiler Parameters Access Settings to be made See chapter ¼...
  • Page 54 4. Installation MCA 35 Low loss header Cascade outlet sensor Connect the sensor to the terminal block S SYST on the master boiler. Cable BUS Connect the DHW sensor (Package AD212) Install the expansion vessel on the heating return pipe ¼...

  • Page 55: 4.11 Electrical Diagram

    MCA 35 4. Installation 4.11 Electrical diagram 3 2 1 2 3 4 1 1 2 3 1 2 3 2 3 4 5 1 2 3 GN/YW 1 3 2 3 1 2 1 2 4 5 SCU-C X121 X117 PUMP A 230V, 50Hz...

  • Page 56: 4.12 Filling The System

    4. Installation MCA 35 4.12 Filling the system 4.12.1. Water treatment In most cases, the boiler and the central heating installation can be filled with normal tap water and no water treatment will be necessary. WARNING Do not add chemical products to the central heating water without first consulting a water treatment professional.

  • Page 57: Filling The Siphon

    MCA 35 4. Installation 4.12.2. Filling the siphon 1. Remove the siphon. 2. Fill the siphon with water. This must be filled up to the level markers. 3. Re-assemble the siphon. CAUTION Fill the water siphon before starting the boiler to avoid combustion products escaping from the boiler.
  • Page 58 4. Installation MCA 35 3. Close the disconnector valves when the manometer indicates a pressure of 2 bar 2 bar T001619-A 4. Check the tightness of the water connections. T001507-B 15/06/12 - 300022160-001-01...

  • Page 59: Commissioning

    MCA 35 5. Commissioning Commissioning Control panel 5.1.1. Description of the keys AUTO Temperature setting key (heating, DHW, swimming pool) Operating mode selection key DHW override key Key to access the parameters reserved for the installer Keys on which the function varies as and when selections are made Rotary setting button: Turn the rotary button to scroll through the menus or...

  • Page 60: Description Of The Display

    5. Commissioning MCA 35 5.1.2. Description of the display n Key functions Access to the various menus > Used to scroll through the menus Used to scroll through the parameters The symbol is displayed when help is available Used to display the curve of the parameter selected <...
  • Page 61 MCA 35 5. Commissioning n Solar (If connected) The solar load pump is running The top part of the tank is reheated to the tank set point The entire tank is reheated to the tank set point < AUTO The entire tank is reheated to the solar tank set point The tank is not loaded - Presence of the solar control system n Operating modes...
  • Page 62 5. Commissioning MCA 35 n System pressure Pressure indicator: The symbol is displayed when a water pressure sensor is connected. Flashing symbol: The water pressure is insufficient. Steady symbol: The water pressure is sufficient. Water pressure level < AUTO R : 0,9 to 1,1 bar E : 1,2 to 1,5 bar Z : 1,6 to 1,9 bar A : 2,0 to 2,3 bar...

  • Page 63: Access To The Various Browsing Levels

    MCA 35 5. Commissioning 5.1.3. Access to the various browsing levels n User level The information and settings in the User level can be accessed by everyone. 1. Press the > key. SUNDAY 11:45 < AUTO C002219-D-04 n Installer level The information and settings in the Installer level can be accessed by experienced people.

  • Page 64: Browsing In The Menus

    5. Commissioning MCA 35 n After Sales level The After Sales Service information and settings can be accessed by the professional providing the After Sales Service. 1. Press the > key. SUNDAY 11:45 < AUTO C002219-D-04 2. Press key - for around 5 seconds. It is also possible to access the After Sales level by SUNDAY 11:45 pressing only the - key for around 10 seconds.

  • Page 65: Check Points Before Commissioning

    MCA 35 5. Commissioning 5. To modify the parameter, turn the rotary button. 6. To confirm, press the rotary button. CURRENT PROG.C "Choice of the timeprogram applied C" To cancel, press key h . < AUTO C002222-C-04 7. To go back to the main display, press key j 2 times. It is possible to use the ( and ' keys instead of the rotary LUNDI 11:45 button.

  • Page 66: Gas Circuit

    5. Commissioning MCA 35 5.2.2. Gas circuit WARNING Ensure that the boiler is switched off. 1. Open the main gas supply. 2. Unscrew the two screws located under the front panel by a quarter turn and remove the panel. 3. Tilt the control box forwards by opening the holding clips located at the sides.

  • Page 67: Gas Settings

    MCA 35 5. Commissioning 4. Turn on the boiler using the on/off switch. C002366-B 5. The first time the boiler is powered up, the LANGUAGE menu is displayed. Select the desired language by turning the rotary button. LANGUE FRANCAIS Français - Deutsch - English - Italiano - Espanol - Nederlands 6.

  • Page 68: Setting The Air/Gas Ratio (Full Load)

    5. Commissioning MCA 35 ¼ See chapter: "Professional settings", page 81 5.4.2. Setting the air/gas ratio (Full load) 1. Unscrew the plug of the flue gas measurement point. 2. Connect the flue gas analyser. WARNING Ensure that the opening around the sensor is completely sealed when taking measurements.

  • Page 69: Setting The Air/Gas Ratio (Part Load)

    MCA 35 5. Commissioning control and setting values for gas H (G20) at full load Boiler type Setting value Checking value MCA 35 4,8 ± 0,4 9,0 ± 0,2 4,8 ± 0,5 9,0 ± 0,3 control and setting values for gas L (G25) at full load Boiler type Setting value Checking value...
  • Page 70 5. Commissioning MCA 35 6. If this rate does not match the required value, correct the gas/air ratio using the adjustment screw B on the gas valve unit. Turn the screw B anticlockwise to obtain a lower value. Turn the screw B clockwise to obtain a higher CO value.

  • Page 71: Basic Setting For The Gas/Air Ratio

    MCA 35 5. Commissioning 5.4.4. Basic setting for the gas/air ratio If the gas/air ratio is out of adjustment, the gas valve unit has a basic setting. To do this, proceed as follows: 1. Switch off the boiler electrical power supply. 2.

  • Page 72: Setting The Parameters Specific To The Installation

    5. Commissioning MCA 35 Regardless of what is done to the keys, the regulator switches back to CLASSIC mode after 30 minutes. 5.5.2. Setting the parameters specific to the installation 1. Access the installer level: Press key - for around 5 seconds. 2.
  • Page 73 MCA 35 5. Commissioning Installer level - #SYSTEM menu Parameter Adjustment range Description Factory setting Customer setting Use of a tank load pump on the Mr outlet PUMP P.DHW: Use of a reversal valve for DHW production Small capacity tank BS60 Large capacity tank Use as a domestic loop pump...
  • Page 74 5. Commissioning MCA 35 Installer level - #SYSTEM menu Parameter Adjustment range Description Factory setting Customer setting Start anti-freeze in boiler command ANTIFR ANTIFR I.TEL: ON or OFF contact: I.TEL: can be used as an 0/1 A antifreeze activation inlet on circuit A ON or OFF contact: I.TEL: can be used as an 0/1 B antifreeze activation inlet on circuit B...
  • Page 75 MCA 35 5. Commissioning Influence of the parameter setting CT.TEL on the I.TEL: contact CT.TEL I.TEL: C contact closed C contact open The antifreeze mode is active on all boiler circuits. The mode selected on the boiler is active. CLOSE ANTIFR The mode selected on the circuit is active.

  • Page 76: Naming The Circuits And Generators

    5. Commissioning MCA 35 Influence of the parameter setting CT.TEL on the I.TEL: contact CT.TEL I.TEL: C contact closed C contact open The mode selected on the boiler is active. The antifreeze mode is active on all boiler circuits. OPEN ANTIFR The antifreeze mode is active on the circuit The mode selected on the circuit is active.

  • Page 77: Setting The Heating Curve

    MCA 35 5. Commissioning 3. Select the circuit or generator you wish to rename. Installer level - Menu #NAMES OF THE CIRCUITS Parameter Description Name given by the customer Circuit A CIRC. A: Circuit B CIRC. B: Circuit C CIRC. C: Auxiliary circuit CIRC.AUX CIRC.B...
  • Page 78 5. Commissioning MCA 35 3. Select the parameter CIRC. CURVE ..BUILD.INERTIA CIRC.CURVE B CIRC.CURVE C SCREED DRYING < AUTO C002316-E-04 4. To modify the value directly, turn the rotary button. To modify the value by displaying the curve, press key f . CIRC.CURVE B "Slope of the heatcurve of the circuit B"...

  • Page 79: Finalizing Work

    MCA 35 5. Commissioning n Heating curve with BCT The BCT (Base heat Curve Temperature) parameter allows a minimum operating temperature to be imposed on the heating circuit (this temperature may be constant if the circuit gradient is nil). Maximum temperature of the circuit C°...

  • Page 80: Reading Out Measured Values

    5. Commissioning MCA 35 Reading out measured values The various values measured by the appliance are displayed in the #MEASURES menu. 1. To access user level: Press the > key. 2. Select the menu #MEASURES. SUNDAY 11:45 Turn the rotary button to scroll through the menus or modify a value.

  • Page 81: Changing The Settings

    MCA 35 5. Commissioning Changing the settings The boiler control panel is set for the most common heating systems. With these settings, practically all heating systems operate correctly. The user or installer can optimise the parameters according to own preferences. ¼...
  • Page 82 5. Commissioning MCA 35 User level - Menu #SETTING Parameter Adjustment range Description Factory setting Customer setting 15 to 30 °C Used to set the outside temperature above 22 °C SUM/WIN which heating will be shut down. The heating pumps are shut down. The burner will only start for domestic hot water needs.

  • Page 83: Professional Settings

    MCA 35 5. Commissioning 5.7.3. Professional settings 1. Access the installer level: Press key - for around 5 seconds. 2. Set the following parameters: SUNDAY 11:45 Turn the rotary button to scroll through the menus or TEMP.: 68° modify a value. Press the rotary button to access the selected menu <...
  • Page 84 5. Commissioning MCA 35 Installer level - Menu #SECONDARY LIMITS Parameter Adjustment range Description Factory setting 20 to 95 °C Maximum temperature (Circuit A) 75 °C MAX.CIRC.A ¼ "MAX.CIRC...", page 85 20 to 95 °C Maximum temperature (Circuit B) 50 °C MAX.CIRC.B ¼...
  • Page 85 MCA 35 5. Commissioning Installer level - Menu #SECONDARY INSTAL.P Parameter Adjustment range Description Factory Customer setting setting 0 (10 hours) to 10 Characterisation of building's inertia: 3 (22 hours) BUILD. INERTIA (50 hours) 0 for a building with low thermal inertia. 3 for a building with normal thermal inertia.
  • Page 86 5. Commissioning MCA 35 Installer level - Menu #SECONDARY INSTAL.P Parameter Adjustment range Description Factory Customer setting setting The lower temperature is maintained DEC. DEC. NIGHT (Night mode) ¼ "NIGHT", page 87 The boiler is stopped (Night mode) STOP ¼ "NIGHT", page 87 OFF / Activating the control at 0-10 V IN 0-10V...
  • Page 87 MCA 35 5. Commissioning Installer level - Menu #SECONDARY INSTAL.P Parameter Adjustment range Description Factory Customer setting setting The anti legionella function acts to LEG PROTEC prevent the development of legionella in the dhw tank, these bacteria are responsible for legionellosis. Anti-legionella function not activated The tank is overheated every day from DAILY...
  • Page 88 5. Commissioning MCA 35 n CIRC. CURVE ... Heating curve circuit A, B or C Outside temperature (°C) Water flow temperature (°C) Maximum temperature of the circuit B - C M001678-B n ANTICIP.A, ANTICIP.B, ANTICIP.C Room temperature instruction - Comfort Room temperature instruction - Low Time schedule 0,5K...
  • Page 89 MCA 35 5. Commissioning STOP DRYING TEMP START DRYING TEMP Today NB DAYS DRYING Normal regulation (End of drying) Heating temperature setting (°C) 00:00 00:00 00:00 For example STOP DRYING TEMP: 47 °C START DRYING TEMP: 20 °C NB DAYS DRYING Normal regulation (End of drying) Heating temperature setting (°C) Every day at midnight (00:00): the set point (START...

  • Page 90: Configuring The Network

    5. Commissioning MCA 35 4 When the room temperature is higher than the room sensor set point: Heating is shut down during reduced periods. When installation antifreeze is active, the reduced temperature is maintained during reduced periods. n Function 0-10 V This function controls the boiler using an external system that includes a 0-10 V output connected to the 0-10 V input.
  • Page 91 MCA 35 5. Commissioning Installer level - Menu #NETWORK Parameter Adjustment range Description Factory setting Customer setting ON / NO ON: System in cascade CASCADE: Specific menu: Enlist VMs in cascade VM NETWORK mode ¼ See chapter: "Connecting VM iSystem in cascade", page ON / NO Configure this control system as MASTER CONTROLLER...
  • Page 92 5. Commissioning MCA 35 2. Select SYSTEM NETWORK and press the rotary button to go to the specific menu. CASCADE MASTER CONTROLER SYSTEM NETWORK FUNCT TRADITIONAL INTER STAGE TIMER < AUTO C002409-C-04 3. To add a slave appliance to the network, select ADD SLAVE. NB.NETWORK ELEMENTS ADD SLAVE ERASE NETWORK...

  • Page 93: Return To The Factory Settings

    MCA 35 5. Commissioning n Connecting VM iSystem in cascade It is possible to assign VMs only as slaves. Proceed as follows: 1. Select VM NETWORK and press the rotary button to go to the specific menu. 2. The screen displayed is used to select the numbers of the slave VMs to be added to the network.
  • Page 94 5. Commissioning MCA 35 After reset (TOTAL RESET and RESET EXCEPT PROG.), the control system goes back to the display of the language choice after a few seconds. LANGUE FRANCAIS Français - Deutsch - English - Italiano - Espanol - Nederlands 1.

  • Page 95: Switching Off The Boiler

    MCA 35 6. Switching off the boiler Switching off the boiler Installation shutdown CAUTION Do not switch off the mains supply to the appliance. If the central heating system is not used for a long period, we recommend activating the HOLIDAYS mode (to ensure the anti-grip of the heating pump).

  • Page 96: Checking And Maintenance

    7. Checking and maintenance MCA 35 Checking and maintenance General instructions WARNING Maintenance operations must be done by a qualified engineer. An annual inspection is compulsory. Only original spare parts must be used. 4 Have the flues swept at least once a year or more, depending on the regulations in force in your country.

  • Page 97: Customising Maintenance

    MCA 35 7. Checking and maintenance Menu #EMISSION MEASUREMENTS Generator Function available Description Values displayed Generator name AUTO normal operation °C BOILER TEMP. µA CURRENT WIND SPEED °C BACK TEMP Operating at minimum output °C PMIN BOILER TEMP. µA CURRENT WIND SPEED °C BACK TEMP...

  • Page 98: Contact Details Of The Professional For After Sales Support

    7. Checking and maintenance MCA 35 Clearing the maintenance message: After carrying out the maintenance operations, modify the date in the #REVISION menu to clear the message. In the event of maintenance before the maintenance message is displayed: After carrying out early maintenance operations, it is necessary to set a new date in the #REVISION menu.

  • Page 99: Checking The Hydraulic Pressure

    MCA 35 7. Checking and maintenance 7.4.1. Checking the hydraulic pressure The hydraulic pressure must reach a minimum of 0,8 bar. If the hydraulic pressure is lower than 0,8 bar, the symbol bar flashes. If necessary, top up the water level in the heating system (recommended hydraulic pressure between 1,5 and 2 bar).

  • Page 100: Checking The Automatic Air Vent

    7. Checking and maintenance MCA 35 7.4.5. Checking the automatic air vent 1. Switch off the boiler electrical power supply. 2. Close the gas valve on the boiler. 3. Close the main gas inlet valve. Gas/Gaz 4. Unscrew the two screws located under the front panel by a quarter turn and remove the panel.

  • Page 101: Checking The Burner And Cleaning The Heat Exchanger

    MCA 35 7. Checking and maintenance 7.4.8. Checking the burner and cleaning the heat exchanger CAUTION During inspection and maintenance operations, always replace all gaskets on the parts removed. 1. Remove the air inlet flue on the venturi. 2. Unscrew the top connection on the gas valve unit. 3.

  • Page 102: Specific Maintenance Operations

    7. Checking and maintenance MCA 35 Specific maintenance operations If the standard inspection and maintenance operations have revealed the necessity to carry out additional maintenance work, proceed as follows, depending on the nature of the work: 7.5.1. Replacing the ionization/ignition electrode Replace the ionization/ignition electrode in the following cases: 4 Ionization current <3 µA.

  • Page 103: Replacing The 3-Way Valve

    MCA 35 7. Checking and maintenance 7.5.2. Replacing the 3-way valve If it becomes necessary to replace the 3-way valve, proceed as follows: 1. Close the main water valve 2. Drain the boiler. 3. Remove the air vent hose above the siphon. 4.

  • Page 104: Replacing The Non-Return Valve

    7. Checking and maintenance MCA 35 7.5.3. Replacing the non-return valve Replace the nonreturn valve when faulty or when the maintenance kit contains one. To do this, proceed as follows: 1. Remove the air inlet flue on the venturi. 2. Unscrew the top connection on the gas valve unit. 3.

  • Page 105: Assembling The Boiler

    MCA 35 7. Checking and maintenance 7.5.4. Assembling the boiler 1. Follow the procedure in reverse to re-assemble all of the components. CAUTION During inspection and maintenance operations, always replace all gaskets on the parts removed. 2. Fill the siphon with clean water up to the mark. 3.

  • Page 106: Troubleshooting

    8. Troubleshooting MCA 35 Troubleshooting 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.
  • Page 107 MCA 35 8. Troubleshooting Code Messages Description Checking / solution Maximum difference between The water flow in the installation is insufficient BL.DT OUTL RET. the flow and return Check the circulation (direction, pump, valves) temperature exceeded Check the water pressure Check the cleanliness of the heat exchanger Sensor error Check that the sensors are operating correctly...
  • Page 108 8. Troubleshooting MCA 35 Code Messages Description Checking / solution No flame during operation No ionization current BL.FLAME LOS Purge the gas supply to remove air Check that the gas valve is fully opened Check the supply pressure Check the operation and setting of the gas valve unit Check that the air inlet and flue gas discharge flues are not blocked Check that there is no recirculation of flue gases...

  • Page 109: Message History

    MCA 35 8. Troubleshooting Message history The menu (#MESSAGE HISTORIC) is used to consult the last 10 messages displayed by the control panel. 1. Access the "After Sales" level: Hold down the - key until #PARAMETERS is displayed. 2. Select the menu (#MESSAGE HISTORIC). SUNDAY 11:45 TEMP.: _ _ _ _ Turn the rotary button to scroll through the menus or...
  • Page 110 8. Troubleshooting MCA 35 3. Press the ? key. Follow the instructions displayed to solve the problem. 4. Consult the meaning of the codes in the table below: SUNDAY 11:45 TEMP. : 68° PCU COM.FAIL D27 < AUTO C002302-D-04 Code Faults Cause Description Checking / solution...
  • Page 111 MCA 35 8. Troubleshooting Code Faults Cause Description Checking / solution of the fault Boiler temp too low Bad connection DEF.OUTLET S. Check the wiring between the PCU PCB and the sensor Check that the SU PCB is correctly in place Check that the sensor has been correctly fitted Sensor fault Check the Ohmic value of the sensor...
  • Page 112 8. Troubleshooting MCA 35 Code Faults Cause Description Checking / solution of the fault Return temperature too low Bad connection BACK S.FAILURE Check the wiring between the PCU PCB and the sensor Check that the SU PCB is correctly in place Check that the sensor has been correctly fitted Sensor fault Check the Ohmic value of the sensor...
  • Page 113 MCA 35 8. Troubleshooting Code Faults Cause Description Checking / solution of the fault Difference between the flow Sensor fault RET-DEP>MAX and return temperatures too Check the Ohmic value of the sensor great Replace the sensor if necessary Bad connection Check that the sensor has been correctly fitted No water circulation Vent the air in the heating system...
  • Page 114 8. Troubleshooting MCA 35 Code Faults Cause Description Checking / solution of the fault Detection of a parasite flame Ionization current present when there should not be a PARASIT FLAME flame Ignition transformer defective Check the ionization/ignition electrode Gas valve defective Check the gas valve and replace if necessary The burner remains very hot: CO too high...
  • Page 115 MCA 35 8. Troubleshooting Code Faults Cause Description Checking / solution of the fault The BL inlet opened for a short Bad connection BL OPEN FAIL time Check the wiring External cause Check the device connected to the BL contact Parameter incorrectly set Check the parameter IN.BL HRU/URC unit test error...
  • Page 116 8. Troubleshooting MCA 35 Code Faults Cause Description Checking / solution of the fault System sensor fault Bad connection SYST.SENS.FAIL. ¼ Check whether the sensor is connected: See chapter: "Deletion of sensors from the memory in the PCB", page 116 Check the link and the connectors Check that the sensor has been correctly fitted Sensor fault...
  • Page 117 MCA 35 8. Troubleshooting Code Faults Cause Description Checking / solution of the fault Swimming pool sensor fault Bad connection SWIM.P.B. S.FAIL circuit B SWIM.P.C. S.FAIL ¼ Check whether the sensor is connected: Swimming pool sensor fault See chapter: "Deletion of sensors from the circuit C memory in the PCB", page 116 Note:...

  • Page 118: Deletion Of Sensors From The Memory In The Pcb

    8. Troubleshooting MCA 35 8.4.1. Deletion of sensors from the memory in the The configuration of the sensors is memorised by the SCU PCB. If a sensor fault appears whilst the corresponding sensor is not connected or has been voluntarily removed, please delete the sensor from the SCU PCB memory.

  • Page 119: Parameter And Input/Output Check (Mode Tests)

    MCA 35 8. Troubleshooting Parameter and input/output check (mode tests) Use the following menus to target the cause of a malfunction. 1. Access the "After Sales" level: Hold down the - key until #PARAMETERS is displayed. 2. Check the following parameters: SUNDAY 11:45 TEMP.: _ _ _ _ Turn the rotary button to scroll through the menus or...
  • Page 120 8. Troubleshooting MCA 35 After Sales level - Menu #PARAMETERS Parameter Description Water temperature in the DHW tank (1)(3) WATER TEMP. Voltage at input 0-10 V (1)(3) IN 0-10V Ionization current CURRENT Water pressure in the installation PRESSURE Water temperature in the storage tank STOR.TANK.TEMP Water temperature in the bottom of the DHW tank (1)(3)
  • Page 121 MCA 35 8. Troubleshooting After Sales level - Menu #TEST INPUTS Parameter Status Description ¼ See chapter: "Control system sequence", page SEQUENCE Control system sequence. Index of the generator in the system BOILER Generator type TYPE Presence of a remote control A R.CTRL A No remote control A Presence of a remote control B...

  • Page 122: Control System Sequence

    8. Troubleshooting MCA 35 8.6.1. Control system sequence Control system sequence Status Sub-status Operation Boiler stopped Anti-short cycle activated Reversal valve opening Start-up of the boiler pump Awaiting burner start-up Open gas valve (External) Fan start-up The fan switches to the burner start-up speed Check RL signal (Function not active) Burner on switch request Pre-ignition...

  • Page 123: Spare Parts

    MCA 35 9. Spare parts Spare parts General When it is observed subsequent to inspection or maintenance work that a component in the appliance needs to be replaced, use only original spare parts or recommended spare parts and equipment. To order a spare part, give the reference number shown on the list.

  • Page 124: Casing

    9. Spare parts MCA 35 9.2.1. Casing 1007 1001 1002 1006 EV 119475-1 T001326-B 15/06/12 - 300022160-001-01...

  • Page 125: Heat Exchanger And Burner

    MCA 35 9. Spare parts 9.2.2. Heat exchanger and burner 2025 2026 2028 2029 2019 2018 2016 2001 2013 2012 2014 2015 2017 2024 2011 2034 2050 2015 2033 2011 2022 2021 2023 2006 2005 2034 2020 2005 2010 2032 2032 2010 2002...

  • Page 126: Fan

    9. Spare parts MCA 35 9.2.3. 3005 3003 3004 3002 3011 3012 3008 3001 3008 3006 3010 T001328-B EV 119475-3 15/06/12 - 300022160-001-01...

  • Page 127: Control Panel

    MCA 35 9. Spare parts 9.2.4. Control panel 4022 4022 4019 4021 4018 4030 4023 4017 4024 4008 4016 4027 4015 4007 4008 4028 4006 4009 4002 4014 4011 4001 4010 4004 4014 4012 4025 4003 4026 T001329-C EV 119475-4 15/06/12 - 300022160-001-01...

  • Page 128: Connecting Pipes

    9. Spare parts MCA 35 9.2.5. Connecting pipes 5046 5039 5038 5044 5043 5037 (5x) 5049 5048 5038 5047 5041 5042 5050 5045 5012 5013 5013 5056 5055 5045 5012 5018 5033 5017 5006 5016 5021 5019 5007 5010 5015 5022 5023 5008...

  • Page 129: Spare Parts List

    MCA 35 9. Spare parts 9.2.6. Spare parts list Markers Code no. Description Part Casing 1001 S101450 Front casing 1002 S100940 Control panel flap 1006 S101403 Screw 1007 S101190 Plug 8,5x0,75x1,0 Heat exchanger and burner 2001 S101180 Heating body 40 kW 2002 S101181 Condensates collector 338 mm...
  • Page 130 9. Spare parts MCA 35 Markers Code no. Description Part 3010 S100806 DHW end connection 15 mm 3011 S100951 Screw M5x25 3012 S101010 Nuts G3/4 Control panel 4001 S101308 PCU-03 PCB 4002 S100849 SU-01 PCB 4003 S101249 DDT display board 4004 S43561 2,00 glass fuse A slow...
  • Page 131 MCA 35 9. Spare parts Markers Code no. Description Part 5027 S101002 Condensate evacuation hose 5028 S100866 Safety valve hose 5029 S100825 Screw K50x12 5030 S62727 Grommet Ø 20 mm 5031 S100809 Flow and return connection 18 mm 5032 S100808 DHW end connection 13 mm 5033 S100827...
  • Page 132 Зубарев переулок, д. 15/1 Бизнес-центр «Чайка Плаза», офис 309 +7 (495) 221-31-51 DUEDI S.r.l. DE DIETRICH THERMIQUE Iberia S.L.U. www.duediclima.it www.dedietrich-calefaccion.es Distributore Ufficiale Esclusivo Av. Princep d’Astúries 43-45 De Dietrich-Thermique Italia 08012 BARCELONA Via Passatore, 12 - 12010 +34 932 920 520...

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