MCR 24, 24/28 MI, 30/35 MI, 34/39 MI English Wall-hung gas condensation boilers 08/06/06 Technical instructions
Contents Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Symbols used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Important recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Declaration of compliance 1 Declaration of compliance A.R. 8/1/2004 - BE Manufacturer DE DIETRICH THERMIQUE S.A.S.
Symbols used danger Caution ZReference Risk of injury and damage to equipment. Attention must be Refer to another manual or other pages in this instruction paid to the warnings on safety of persons and equipment Important information Information must be kept in mind to maintain comfort manual DHW:Domestic hot water Important recommendations MCR boilers must be installed : - in a frost-free room; - as close as possible to draw-off points in order to minimise energy losses through the pipes.
Description MCR boilers are gas condensing boilers; they handle : If converting to propane : - central heating using radiators or underfloor heating (MCR 24); - central heating and instant domestic hot water production (MCR ... MI). ZSee "Adapting to another gas" The MCR 24 boiler can be connected to a 80 or 130 litre tank to produce domestic hot water. The boilers operate on natural gas or propane. They are factory set for natural gas H.
3 Main parts 1. Automatic bleed valve 2. Smoke nozzle 3. Outlet for measuring combustion hygiene 4. Heat exchanger 5. Air/gaz canal 6. Fan air inlet 7. Gas block 8. Display 9. Control panel 10. Pressure gauge 11. Circulating pump 12. Expansion chamber (only for MCR 24,MCR24/28 MI,MCR 30/35 MI) 13. Ignition/ionisation electrode 14.
4 Technical data Boilers MCR 24 MCR 24/28MI MCR 30/35MI MCR 34/39MI Nominal useful output 40/30 (Heating mode) (min./max) kW 6.3/25 6.3/25 6.6/31.3 6.8/35.5 Nominal useful output 80/60 (min./max) kW 5.5/23.6 5.5/23.6 5.7/29.5 5.9/33.3 Nominal useful output (DHW mode) (min./max) kW - 27.4 34.3 38.2 Nominal input power (heating and DHW modes) kW 24/24 24/28 30/35 34/39 Minimum useful output 40/30 (Heating mode) kW 6.3 6.3 6.6 6.
Main dimensions 1 Package list (Standard delivery) • France + Other countries Boiler package Boilers Forced flue package Horizontal (diameter 60/100) Vertical (diameter 80/125) MCR 24 HG1 DY847 CX50 MCR 24/28MI HG2 DY847 CX50 MCR 30/35MI HG3 DY847 CX50 MCR 34/39MI HG4 DY847 CX50 • Belgium Boiler package Boilers Forced flue package Horizontal (diameter 60/100) Vertical (diameter 80/125) MCR 24 BE HG5 DY847 CX50 MCR 24/28MI BE HG6 DY847 CX50 MCR 30/35MI BE HG7 DY847 CX50 MC
3 Mounting frame A stand off frame is an option for easy and fast upward piping behind the boiler; a pipework kit is an option for a upward piping in combination with the stand off frame.
MCR 24/28MI, 30/35MI, 34/39MI France + Other countries Belgium + Germany + Poland Return connection (Inside diameter 18 mm) Return connection (External diameter 22 mm) Gas connection (Inside diameter 18 mm) Gas connection (External diameter 22 mm) Flow connection (Inside diameter 18 mm) Combustion air inlet (Ø 100 mm) Flue gas discharge duct (Ø 60 mm) Return storage tank (Inside diameter 16 mm) Flow connection (External diameter 22 mm) Combustion air inlet (Ø 100 mm) Flue gas d
Operation MCR boilers are equipped with a control panel with electronic regulation including security and flame surveillance by ionisation probe. The boiler is not sensitive to phase reversal. The normal maximum absorbed power is between 115 W and 130 W. The boiler is entirely pre-wired. All external connections can be made with terminal block X9.
1 Control panel The control panel of the MCR boiler has 6 function keys, an on/off switch and a screen. The function keys are used to read or modify parameters and temperatures.
2 Parameter display The following parameters can be displayed in the information menu : - 2.1 Setting the manual mode ( ) t1 = Flow temperature (°C) t2 = Return temperature (°C) t3 = Tank sensor (°C) t4 = Outside temperature (°C) FL = Ionisation current (µA) nF = Fan speed (rpm) - Press key Ä several times until the symbol flashes on the menu bar. - Press the l key. The minimum outlet temperature P1 or the text Auto is displayed if an outside temperature sensor is installed.
2.2 - Starting from the current operating status, press key . The symbol and the current temperature are displayed. Press the - key until the OFF symbol is displayed. Press the l key to modify the setting. The symbol appears. 14 Switching off the central heating (In summer mode) 2.3 - Switching off the domestic hot water( ) Starting from the current operating status, press key . The symbol and the current temperature are displayed. Press the - key until the OFF symbol is displayed.
2.4 - Starting from the current operating status, press key . The symbol and the current temperature are displayed. Press the + or - key to modify the value. To confirm, press the l key. 2.5 - Modifying the water outlet temperature in the heating installation Setting the domestic hot water temperature 2.6 Modifying the comfort setting (ECO) The user can consult or modify the following 3 settings: - ON = Activation of the energy-saving setting.
Hydraulic specifications 1 Boiler pump Depending on the flow, the following diagrams represent:: manometric heights available at boiler outlet. • MCR 34/39 MI For a fixed flow, the manometric height available at the boiler outlet is obtained by taking the difference between the manometric height of the circulator pump and the loss of load in the boiler.
Installation Residential buildings for France Statutory terms and conditions of installation and maintenance The installation and maintenance of the appliance must be carried out by a qualified professional in compliance with the statutory texts of the codes of conduct in force, particularly : - Order of 2 August 1977 Technical and safety rules applicable to combustible gas and liquefied hydrocarbon installations situated inside residential buildings and their annexes.
Certificate of compliance For the application of article 25 of the modified decree dated 02/08/ 1977 and of article 1 of the modifed decree dated 05/02/1999, the installation engineer must be in possession of the certificates of compliance approved by the Ministries in charge of construction and gas safety: - Different forms (forms 1, 2 or 3) for a new gas installation, - "Model 4" in particular after replacing a furnace with a new one.
1 Water treatment and connections Fill the heating system only with non-treated drinking water (pH between 6 and 9). If you require more information on specific subjects, do not hesitate to contact our technical department. If used correctly water treatment can improve the boilers efficiency and increase the anticipated life expectancy of the boiler.
1.4 Stove fitting connections - Horizontal flue gas conduits must be installed with a zero gradient. The run-off of condensates to the boiler is handled by the eccentricity of the horizontal terminal. The terminal must be oriented according to the figure below. - Static test overpressure : 1000 Pa - Maximum leak rate : 50 l/hm2 depending on the internal surface of the flue gas pipe - A diameter 60 = 0.18 m2/m, A diameter 80 = 0.25 m2/m, - A diameter 100 = 0.31 m2/m, A diameter 130 = 0.40 m2/m.
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• Horizontal forced flue Ø 60/100 mm (type C13x connection) Connection to an outside wall or roof outlet. A Flue gases B Combustive air • Connection C33x - Concentric vertical forced flue Connection to a sloping or flat roof.
• Connection C33x ( C33s: For Belgium) - Concentric pipes in the boiler room - Single pipes in the chimney (combustive air in counter current) Discharge via conduit, fresh air in counter current.
• Separate air and flue gas connection Ø 60/100 mm over 2xØ80 mm (type C53 connection) A Ventilation (100 cm2 minimum) B Casing classified (M1) C Leak proof rose D Inspection hatch E • Connection to a chimney Ø 80 mm type B23 connection) Chimney conduit fitting into a chimney, combustive air taken in the premises.
1.8 Electrical connection (230 V) The boilers are delivered pre-fitted with a 3-conductor power supply cable with an available length of around 1.5 metres. The appliance must be powered by a circuit containing an omnipolar switch with an opening distance 3 mm. qualified professionnals may carry out electrical Only connections, always with the power off. When connecting to the mains, be sure to respect live for the brown wire, neutral for the blue wire and earth for the green/yellow wire.
2 Connecting the options Optional equipment can be connected to the connectors on the control panel. `Tilt the flap on the control panel. ZRefer to the instructions delivered with the package. `Open the protective hood. `Make the connections according to the optional equipment you are using. Programmable room temperature thermostat (Package AD 137) or Wireless settable ambient thermostat (Package AD 200) or Non settable ambient thermostat (Package AD 140).
3 Connecting the external controls - Unscrew the 2 screws. Remove the front panel of the cladding. Run the cables in the cable clamps. Connect the cables to the connectors (See drawing opposite). off the mains electricity supply before carrying out Switch any work.
3.1 ON/OFF room thermostat : Existing bridge : Cable BUS: AD 221 or AD 222 MCR boilers can be connected to a 2-wire on/off room thermostat. Choose a location in a "reference" room representative of the room temperature to be taken into account if the remote control is used as a room sensor. Connect terminals 7 and 8 on the thermostat to the terminals on connector X9. If you are using a room thermostat with anticipation resistance, parameter P5 must no longer be defined as 0 but as 1. 1.
3.2 Easymatic,Easyradio regulation connection : Existing bridge : Cable BUS: AD 221 or AD 222 Modulating thermostats can be connected without further adaptation. Choose a location in a "reference" room representative of the room temperature to be taken into account if the remote control is used as a room sensor. - Connect the regulation on the interface PCB (J7). - Connect connector J6 to the interface PCB on the X9 connector. ZRefer to the instructions delivered with the package. 3.
4 Connection of the domestic hot water sensor If an external domestic hot water tank is used with the MCR boiler, the probe without power from the domestic hot water tank can be connected to connectors 3 and 4 of terminal block X9. : Existing bridge : Connecting the tank sensor The control unit automatically detects the presence of an external sensor. 5 Antifreeze protection - When the water temperature is above 10 °C, the boiler is switched off and the circulation pump runs for another 15 minutes.
6 Safety contact MCR boilers are equipped with a security switch. A voltage-free switching device (e.g. an external gas pressure switch or a safety thermostat for underfloor heating) can be connected to connectors 5 and 6 on terminal X9 after disconnecting all of the cables. When the contact is open, the boiler turns off indicating code 9; it will start again once the contact is closed.
8 Pump logic - In mode (domestic hot water) or with Easymatic in # mode (Summer), the pump operates during the production of domestic hot water. With an Easymatic, the pump shuts down after the pump flow switch-off delay. The heating/domestic hot water reversal valve remains in the DHW position. - With room temperature thermostat - The pump switches off 2 minutes after the contact with the room temperature thermostat is opened.
Commissionning first start-up is to be performed by your installation The engineer. 1 Commissionning The boiler is preset in the factory to operate on natural gas. Operating pressure: 20 mbar. that the equipment is properly set for the type of gas Check used. For Belgium: Operating pressure: 25 mbar. Belgium: Any intervention on the gas valve unit is For strictly forbidden. 1.1 Final checks before commissioning first start-up is to be performed by your installation The engineer.
1.2 Water and gas connections Measuring point on the gas block (C) First check that the water is circulating in the boiler (water pressure in the heating circuit, outlet and return valves open, valves and radiators open, etc.). Opening the valve Open the gas valve. Checking the gas supply pressure: Measurement point C. ZRecommended pressure: See "Certifications". Carry out a gas tightness check. Maximum pressure: 60 mbar. For Belgium: Maximum pressure: 100 mbar.
Check the electrical connections to the thermostat and the other external controls. Checking tightness (hydraulics, combusted gas discharge and gas). 1.3 Values: Setting Boiler type Fan speed (rpm)* CO2 (%) CO2 (%) Natural gas Propane Full load H:3 Switching the boiler on Natural gas Propane 24 ca. 4600 ca. 4400 8.8 ±0.1 10.5 ±0.3 24/28MI ca. 5500 ca. 5200 8.8 ±0.1 10.5 ±0.3 30/35MI ca. 6300 ca. 6000 8.8 ±0.1 10.5 ±0.3 34/39MI ca. 6700 ca. 6400 8.8 ±0.1 10.5 ±0.
1.5 1.6 Setting the gas/air ratio (Part load) Final checks before commissioning Values: Setting Boiler type Fan speed (rpm)* CO2 (%) CO2 (%) Natural gas Propane Replace the plastic plug onto the measuring tube. Put the upper front panel in place. Tighten the screws Part load: L:3 Natural gas Propane 24 ca. 1300 ca. 2000 8.8 ±0.1 10.5 ±0.3 24/28MI ca. 1300 ca. 2000 8.8 ±0.1 10.5 ±0.3 30/35MI ca. 1300 ca. 2000 8.8 ±0.1 10.5 ±0.3 34/39MI ca. 1300 ca. 2000 8.8 ±0.1 10.5 ±0.
Write down the type of gas on the sticker on the inside of the flap.
2 Commissioning • • Switch on the boiler. Activate the main switch in the installation. Commissioning cycle Screen display: - F XX: Software version - P XX: Parameter version • The boiler will begin an automatic venting-programm (which lasts approx. 3 minutes) and will do this every time the power supply is isolated. The version numbers are displayed alternately.
2.4 Setting different parameters (with access code) To get acces to the error memory, the acces code 12 must be entered. Parameter Description Adjustment must be done by a qualified professional.
2.5 Modify parameters - Press the Ä key until the symbol is displayed. - Select the fitter menu using the l key. The symbol COdE appears. - Enter the fitter code 0012 using the - or + key. - To confirm, press the l key. The symbol P:1 appears. - Press the l key a second time. The symbol 75°C appears (Factory setting). - Lower the value to 60°C using the - key. - To confirm, press the l key - To confirm, press the l key. The symbol P:1 appears.
2.7 Return to the factory settings "Reset Param" 2.8 Manual operation ( ) - Press key Ä several times until the symbol flashes on the menu bar. - Press the l key. The symbol AUtO appears (if outside sensor connected). The outlet temperature is determined by the internal heating curve. Minimum outlet temperature: Press the + key to modify the setting. - To confirm, press the l key. The installation is in manual mode. - Press the + key until the P:dF symbol is displayed. - Press the l key.
2.9 Switching off Before any work is carried out on the equipment / heating system, the power supply must be disconnected (by means of the appropriate fuse or main switch, for example) and warning must be given before any reconnection. 2.10 Antifreeze protection We recommend setting the boiler thermostat to a value lower than 10°C if using a classic installation. Define parameter P4 as 1 (energy-saving mode); the heat retention function will be deactivated.
Adapting to another gas Belgium: Only SERV’élite is authorised to carry out the Belgium: The boiler installation and gas connection For For conversion of this appliance. must be carried out by a qualified professional in MCR boilers are preset in the factory for natural gas H. actions described below must be carried out by a The qualified technician. compliance with the NBN D 51.003, NBN D 30.003, NBN B 61.001, NBN B 61.002 and NBN D 51.006 standards.
2.1 Adjusting the gas valve 110850LTW7H030 See "Setting the gas/air ratio".
Maintenance MCR boilers require little maintenance. An annual inspection is compulsory. Maintenance operations must be done by a qualified professional. If the ionisation current is less than 3, check the ignition/ ionisation electrode as well as the ignition line and the earth connection. Only original spare parts must be used. If, on annual inspection, the combusted gas analysis is not in compliance, a setting combustion operation must be carried out. 1 Inspection the power supply to the boiler.
1.2 Check the fresh air inlet and flue gas discharge ducts (or the forced flue) The conduits must allow no leakage of flue gases and be resistant to corrosion. 1.3 Checking condensates discharge (Siphon) 1.4 Checking the ignition electrode - Wipe off all traces of deposits using an abrasive cloth. Check the gap between the electrodes (3 to 4 mm). Check the leak proof seal. Check the ionisation current.
1.5 - Unscrew the upper part of the flue gas measuring point. - Measure the O2 or CO2 content in the flue gases. Checking combustion Measure the content of O2/CO2 and the burnt gas temperature at the flue gas sampling level point. Check that the analysis probe is leakproof against gas at the sampling level point, the extremity of the probe is in the centre of the smoke evacuation pipe.
2 Maintenance Cut the power supply to the boiler. 2.3 Remove the front plate from the combustion chamber Cut the gas supply to the boiler. 2.1 Open Disconnect the ignition electrode from the transformer. Disconnect the electrical connection from the gas valve unit. Remove the gas block connection nut. Disconnect the electrical connection to the fan. Unscrew the 2 screws. Remove the front panel. Disconnect the 2 ignition electrodes from the connector/ignition on the gas valve ( ). 2.
2.4 Burner maintenance Clean the burner with a brush, a vacuum cleaner or a blower. Inspect the burner to detect any damage or cracks in the surface. If the burner is damaged, replace it. 2.5 Maintenance of the heat exchanger - Check the burner seal. - Check the insulating component between the front plate and the thermal exchanger. A damaged or hardened seal must always be replaced.
2.6 Cleaning the plate exchanger (for MCR ... MI) and cleaning of the heater must be carried out Maintenance at least once a year by a qualified technician. Cut off the cold water supply and drain the DHW tank. Bleed the boiler. Unscrew the 2 screws. Remove the exchanger. Clean the plate heat exchanger with a descaling product (citric acid pH 3). A special tool (accessory available as an option) can be used (See:Spare parts centre). Rinse with clean water. Remove the flow switch.
2.7 Re-assembling the boiler Follow in reverse order for re-assembly. not forget to reconnect the fan connector before Do reattaching the fan to the thermal exchanger. Check that the leak proofing material between the front plate and the thermal exchanger is correctly fitted. Top up the installation with water. Restart the boiler. Measure the O2 or CO2 content in the flue gases. Check the ionisation current. Check the seals on the gas and water connections.
Electrical diagram BK Black As Flow sensor Boiler pump BL Blue BP BR Brown Fs Flow switch GN Green CP Pump Green/Yellow DV Inverter valve GN/YW GY Grey GCV Gas valve RD Red HLT Limiting thermostat WH White Os Outside sensor (optional) YW Yellow Rs Return sensor ---- 08/06/06 - 300008460-001-B not supplied / Not connected MCR 24, 24/28 MI, 30/35 MI, 34/39 MI 53
Breakdown codes 1 Alarm code In the event of a breakdown, the symbol m and a flashing code are displayed. Alarm code E0 E1 E2 Description Outlet or return sensor error Press key for 2 seconds. If the error code remains on the screen, look for the nature of the error. Probable causes Checks/Solution Short circuit Check the wiring. Replace the protection caps.
Alarm code E3 E4 Description Control panel: faulty Power supply cable: faulty Probable causes Checks/Solution Control panel: faulty Power supply cable: faulty Power supply cable badly connected Check the electrical connections. No spark from the electrode - Check the ignition electrode (spacing of the electrodes), its connector and its connection cable - Check the positioning of the electrode (gap: 3.
Alarm code E8 E10 56 Description Faulty fan No water circulation during a fan cycle Probable causes Checks/Solution The fan does not work - Check that the fan is working correctly - Check the fan wiring The fan does not stop or the number of rotations displayed is incorrect - Check that the fan is working correctly - Check the fan wiring - Chimney draw must reach the prescribed values The water level and/or pressure are too low Check the water pressure in the installation Carry out a visual ch
2 Control stop or lock-out Code no. Meaning Description 8 Short circuit Measured start temperature t1 > Outlet temperature defined (Tset).
3.1 Display - Press the Ä key until the m symbol is displayed. - Press the l key. The display shows Er0X (for example 02 = Last error which occured). - The + or - keys are used to scroll down the list of errors. - Press the l key: Used to display details of the errors.
Warranty You have just purchased one of our appliances and we thank you for the trust you have placed in our products. France Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained. The preceding dispositions are not exclusive of benefits for the purchaser of the legal guarantee as stated in Civil Code articles 1641 to 1648. Your fitter and our customer support network are at your disposal at all times.
Spare parts - MCR 24, 24/28 MI, 30/35 MI, 34/39 MI 08/06/06 - 300008460-002-B to order a spare part, it is imperative to give the code number shown on the list, against the number of the part required. MCR 24 DE DIETRICH THERMIQUE S.A.S. - Spare parts centre 4 rue d’Oberbronn - F-67110 REICHSHOFFEN - * +33 (0)3 88 80 26 50 - + +33 (0)3 88 80 26 98 cpr dedietrichthermique.
MCR 24/28 MI, 30/35 MI, 34/39 MI 08/06/06 - 300008460-001-B MCR 24, 24/28 MI, 30/35 MI, 34/39 MI 61
Rep 62 Code no. Description Rep Code no. Description MCR 24 2031 S62711 Feed through (diameter 48x28) (5 pieces) 1001 S100223 Front panel 2032 S44483 M8 nut (10 pieces) 1002 S62708 Screw M5x20 (20 pieces) 2033 S58757 Spring (17 mm) (10 pieces) 1003 S62723 Fastening plate: Exchanger (30 kW) 2034 S62433 O-ring (diameter 16x3.
Rep Code no. Description Rep Code no. 4011 Description S43561 Fuse (2 AT) (10 pieces) 1004 S62709 Leakproof seal (10 m) 4012 S59372 Fixing clamp 1005 S62711 Feed through (diameter 48x28) (5 pieces) 4015 S100229 Switch 1006 S62720 Feed through (diameter 46x15) (10 pieces) 5002 S59132 3-way valve motor 1007 S62736 Fixing clamp 5003 S100247 Hydraulic unit (Left) 1008 S62721 Screw K3.5x6.
Rep Code no. Description Rep Code no. 2027 S62751 Pre-mixing chamber hood 4006 S62735 Rear (Control panel) 2028 S62719 Gasket 4007 S62710 Screw K3.5x10 (10 pieces) 2029 S62742 Burner hood 4008 S14254 Screw Parker 4.2x9.
Rep Code no. Description 5034 S100246 Disconnector 5035 S100232 Gasket 8.4x5x1.
MCR 24, 24/28 MI, 30/35 MI, 34/39 MI 08/06/06-300008460-001-B
08/06/06 - 300008460-001-B MCR 24, 24/28 MI, 30/35 MI, 34/39 MI 67
DE DIETRICH HEIZTECHNIK www.dedietrich.com DE DIETRICH THERMIQUE S.A.S. www.dedietrich.com In the interest of customers, De Dietrich Thermique SAS are continuously endeavouring to make improvements in product quality. All the specifications stated in this document are therefore subject to change without notice FR Direction des Ventes France 57, rue de la Gare F- 67580 MERTZWILLER +33 (0)3 88 80 27 00 +33 (0)3 88 80 27 99 AT NEUBERG S.A. www.dedietrich.com DE DIETRICH HEIZTECHNIK www.dedietrich.
