DOMUSA TEKNIK Dualtherm 25 Installation And Operating Instructions Manual
  1. Manuals
  2. Brands
  3. DOMUSA TEKNIK Manuals
  4. Boiler
  5. Dualtherm 25
  6. Installation and operating instructions manual

DOMUSA TEKNIK Dualtherm 25 Installation And Operating Instructions Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

INSTALLATION AND OPERATING INSTRUCTIONS
 DUALTHERM

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Dualtherm 25 and is the answer not in the manual?

Questions and answers

Related Manuals for DOMUSA TEKNIK Dualtherm 25

Summary of Contents for DOMUSA TEKNIK Dualtherm 25

  • Page 1 INSTALLATION AND OPERATING INSTRUCTIONS  DUALTHERM...
  • Page 2 Thank you for choosing a DOMUSA TEKNIK heating boiler. Within the product range offered by DOMUSA TEKNIK you have chosen DualTherm model. With a suitable hydraulic installation and with a correct fuel, this boiler will provide the ideal level of comfort for your home.

  • Page 3: Table Of Contents

    INDEX Page 1 LIST OF COMPONENTS ..............................4   2 CONTROL COMPONENTS ..............................5   3 INSTALLATION INSTRUCTIONS ............................. 6   3.1 L ......................................6  OCATION 3.2 H .................................. 6  YDRAULIC INSTALLATION 3.3 I ........................7  NSTALLING THE TEMPERATURE RELIEF SAFETY VALVE 3.4 I ) ........................
  • Page 4 DualTherm 15 CALIBRATION MENU ..............................42   15.1 F ..................................43  EED AUGER FILLING 15.2 F ................................44  EED AUGER CALIBRATION 15.3 M .......................... 45  ANUAL SETTING OF FEED AUGER CALIBRATION 15.4 M ............................45  ANUAL ASH CLEANING ACTIVATION 15.5 M ..........................
  • Page 5 27.5 F ................................. 62  UME TEMPERATURE SENSOR 27.6 D ............................. 62  RAINING THE CONDENSATE WATER 27.7 B ..............................63  OILER WATER CHARACTERISTICS 28 DIAGRAMS AND MEASUREMENTS ......................... 64   29 CONNECTIONS DIAGRAM ............................65   29.1 B ......................................65  OILER 29.2 B ......................................

  • Page 6: List Of Components

    DualTherm 1 LIST OF COMPONENTS 1. Feed auger. 8. Sensor sheath. 2. Heat exchanger. 9. Fuel inlet safety thermostat. 3. Flue outlet 10. Ash tray. 4. Fan. 11. Burner. 5. Heat exchanger cleaning system. 12. Air pressure sensor. 6. Water pressure sensor. 7.

  • Page 7: Control Components

    2 CONTROL COMPONENTS 14. MENU touch button: 17. ON touch button: This button is used to access and browse This button switches on and off the boiler. through the "User Menu". 18. Boiler temperature touch button: 15. Digital display: This button is used to select the boiler set point It is the main boiler functioning display, on temperature.

  • Page 8: Installation Instructions

    DualTherm 3 INSTALLATION INSTRUCTIONS The boiler must be installed by authorised personnel in compliance with the applicable laws and regulations. This boiler is suitable for heating water to a temperature below boiling point at atmospheric pressure. It must be connected to a heating installation and/or a domestic hot water distribution network, which must always be compatible with its performance and power.

  • Page 9: Installing The Temperature Relief Safety Valve

    • It is obligatory and essential to install a device for raising the return temperature up to 65ºC, to prevent any water condensation in the heat exchanger. If this requirement is not complied with, DOMUSA TEKNIK's guarantee of the appliance will automatically be null and void.

  • Page 10: Installing A Sanit Hot Water Tank (Optional)

    DualTherm 3.4 Installing a Sanit hot water tank (Optional) For a correct electrical connection of a Sanit DHW tank with DualTherm boiler, these steps should be followed: - Unplug the boiler from the mains. - Connect a DHW temperature sensor (supplied optionally) to the sensor terminal strip J7 (Sa; Connections Diagram terminals 18 and 19) (see "...

  • Page 11: Feed Auger

    3.5 Feed auger The DualTHerm boiler is equipped with a hopper for pellet storing. NOTE: The screws to fasten the hopper with the boiler are contained in the documentation bag. NOTE: Position the flexible hose in such a way as to allow the feeding of the pellets with the least possible resistance to the burner.

  • Page 12: Electrical Connection

    Otherwise, the condensation may reach the inside of the boiler and cause irreparable damage, which would not be covered by DOMUSA TEKNIK’s guarantee. The condensation pipe should lead to a drain outlet, as a large amount of water may be generated.

  • Page 13: Bio Hydraulic Kit Installation

    3.8 BIO hydraulic kit installation Optionally, a BIO hydraulic kit, within the kits range offered by DOMUSA TEKNIK, could be connected to DualTherm boiler. In that way the features of the boiler will be increased. It is imperative and obligatory to install a buffer tank when the heating system has a mixed circuit...

  • Page 14: Installation With Abt Buffer Tank

    3.9 Installation with a BT Buffer Tank The DualTherm boiler can be installed with a BT Buffer Tank during the installation from the wide range offered by DOMUSA TEKNIK, which may increase the benefits provided by the boiler in the heating service.
  • Page 15 The temperature of the BT tank is controlled and managed by a temperature sensor (Sbt) immersed in the buffer tank and electrically connected to the boiler. The temperature sensor is optionally supplied by DOMUSA TEKNIK. Heating...
  • Page 16 The temperature of the BT tank is controlled and managed by a thermostat (Tbt) installed and immersed in the buffer tank and electrically connected to the boiler. The temperature control thermostat is not supplied by DOMUSA TEKNIK but can be purchased at any specialist central heating supplies warehouse.

  • Page 17: Installation With Abt-Duo Buffer Tank (Optional )

    The DualTherm boiler can be accompanied by a BT-DUO Buffer Tank during the installation from the wide range offered by DOMUSA TEKNIK, which may increase the benefits provided by the boiler in the heating service. This tank has a hot water storage tank inside, thereby adding the provision of DHW in addition to the buffer tank functionality.
  • Page 18 DualTherm The boiler is supplied with this installation option disabled. To enable it, the electrical resistance (see "Connection Diagram") (Rbt) connected between terminals 20 and 21 of connection strip J7 must be disconnected and replaced with a temperature sensor (supplied as an option by DOMUSA TEKNIK) or a control thermostat installed in the BT buffer tank.
  • Page 19 For the correct hydraulic and electrical installation of a BT-DUO buffer tank, carefully follow the instructions in the manual supplied with it. Once the hydraulic and electrical connection described above has been completed, to adjust and "Operation with a BT-DUO configure the BT-DUO buffer tank operation, carefully read the section buffer tank"...

  • Page 20: Fuel

    The DualTherm boiler must be fuelled with DIN PLUS-certified wood pellets. The DIN PLUS certificate assures that the fuel's moisture levels and calorific value are ideal for optimum boiler functioning performance. If this requirement is not complied, DOMUSA TEKNIK's guarantee will automatically be null and void.

  • Page 21: Unsuitable Fuel

    Do not load firewood into the entire combustion chamber. Always leave a space of at least 10 cm to the deflector. Always put at least four logs at a time. It is advisable to add small wooden slats when using large firewood logs and/or with more moisture.

  • Page 22: Commissioning Of The Boiler

    5.1 Prior warnings Repair and maintenance of the boiler must be carried out by a qualified professional, authorised by DOMUSA TEKNIK. For optimum functioning and conservation of the boiler, it should be serviced annually. Carefully read this instruction manual and keep it in a safe, easily-accessible place. DOMUSA TEKNIK will not be liable for any damages caused by failure to follow these instructions.

  • Page 23: Commissioning

    5.5 Commissioning In order for the guarantee to be valid, the boiler must be commissioned by personnel authorised by DOMUSA TEKNIK. Before beginning the commissioning, the following must be complied with: - The boiler must be plugged in to the mains.

  • Page 24: Digital Display

    DualTherm 6 DIGITAL DISPLAY DualTherm boiler is equipped with a digital touch display for viewing and adjustment of the different boiler settings. The display has various display areas where different icons and numbers appear to indicate the different status of the boiler. Boiler status: Heating function enabled.
  • Page 25 Auxiliary icons. Value or setting related to a temperature is shown by the numerical digits. EXT Value or setting related to the outside temperature is shown by the numerical digits. INT Value or setting related to the room temperature are shown by the numerical digits. bar Value or setting related to the boiler water pressure is shown by the numerical digits.
  • Page 26 DualTherm It is displayed when a value or setting related to DHW recirculation function is shown by the numerical digits. It displays blinking when the DHW recirculation pump is switched on. It is displayed when the feed auger is switched on and it is displayed blinking when it is in manual operation mode.

  • Page 27: Combustion Modes

    7 COMBUSTION MODES The DualTherm boiler is an automatic pellet boiler with the option of manually loading the firewood. The firewood load should be carried out in the burning furnace, which has a water-cooled grill. The DualTherm biuler provides great versatility thanks to its different burning mode. Up to 4 Combustion Modes can be selected: Mode 1 (Pellet only).

  • Page 28: Mode 2 (Combined Mode)

    DualTherm 7.3 Mode 2 (Combined Mode) In this Combustion Mode, the boiler combines operation with pellets and firewood. The boiler automatically lights up the pellet burner when there is a heat demand. If there is a firewood load in the burning furnace, it will automatically light up with the pellet burner. Once the firewood load is fired, the pellet burner turns off.

  • Page 29: Mode 3 (Automatic Firewood)

    7.4 Mode 3 (Automatic firewood) In this Combustion Mode, the boiler operates with firewood and uses the pellet exclusively for its automatic firing. When the firewood furnace door is opened and closed, the pellet burner is activated to fire the firewood whenever there is a heat demand.

  • Page 30: Mode 4 (Manual Firewood)

    DualTherm 7.5 Mode 4 (Manual firewood) In this Combustion Mode, the boiler operates exclusively with firewood. The firewood should be fired manually. Once the firewood is consumed, the boiler will remain off until the wood is reloaded. The ignition process is manual and should be performed as follows: Load the burning furnace with firewood.

  • Page 31: Operation

    8.2 Operating with a Sanit DHW tank (Option) DualTherm boiler could be installed together with a DHW tank Sanit, within the product range offered by DOMUSA TEKNIK, to obtain Domestic Hot Water service. Follow the instructions “Installing a Sanit hot water tank”...

  • Page 32: Boiler Temperature Set Point Selection

    DualTherm 8.3 Boiler temperature set point selection  Boiler temperature set point selection is made by the tactile selector shown in the picture. Press “+” and “-“ buttons to increase or decrease the set point desired. Few seconds after the desired set point temperature is adjusted the display returns to main position.

  • Page 33: Selecting The Set Point Temperature Of The Buffer Tank (Only With Buffer Tank)

    8.5 Selecting the set point temperature of the buffer tank (only with buffer tank)  The desired buffer tank temperature is selected using the touch button, as shown in the figure. To select the desired temperature, touch the "+" or "-" symbols to increase or decrease the temperature.

  • Page 34: Operating With Bio Hydraulic Kits (Optional)

    DualTherm 9 OPERATING WITH BIO HYDRAULIC KITS (OPTIONAL) All models in the DualTherm boiler line can be connected to a kit of the BIO Hydraulic Kit line to manage more than one heating circuit, always accompanied by a buffer between the boiler and the heating system.

  • Page 35: Operation With A Bt Buffer Tank

    The DualTherm boiler can be accompanied by a BT Buffer tank from the wide range of tanks offered by DOMUSA TEKNIK. This tank accumulates heat energy that improves the performance of the system when switching the boiler on and off. For its correct installation, carefully follow the assembly instructions included with the tank and for its correct integration with the DualTherm "Installing a BT Buffer tank"...

  • Page 36: Operation With A Control Thermostat In The Bt Buffer Tank (P.08 = 3 Or 4)

    DualTherm 10.2 Operation with a control thermostat in the BT buffer tank (P.08 = 3 or 4) (see In this operating mode you must select the desired set point temperature of the boiler "Selecting the boiler set point temperature") and, using the control thermostat installed in the buffer tank, you must also select the desired set point temperature in the buffer tank.

  • Page 37: Operation With A Bt-Duo Buffer Tank (Optional)

    The DualTherm boiler can be accompanied by a BT-DUO Buffer tank from the wide range of tanks offered by DOMUSA TEKNIK. This tank accumulates heat energy that improves the performance of the system when switching the boiler on and off. It also incorporates a DHW cylinder in its interior for obtaining Domestic Hot Water.

  • Page 38: Operating With Lago Fb Ot+ Remote Control (Optional)

    DualTherm 12 OPERATING WITH LAGO FB OT+ REMOTE CONTROL (OPTIONAL) A remote control (LAGO FB OT+) can optionally be supplied together with DualTherm boiler. This remote control can be used to fully operate the boiler from anywhere in the room in which it is installed.

  • Page 39: User Menu

    13 USER MENU User Menu " " shows the settings related to boiler functioning on the digital display. To access this menu press MENU; press this button repeatedly to browse through the different settings available. When one of the options is displayed, after 20 seconds the display returns to main "User Menu"...
  • Page 40 DualTherm Actual boiler water pressure. Actual active boiler temperature set point. Mixing heating circuit nº 1 flow temperature set (18) point setting by means of the tactile button (BIO Hydraulic kit option only) Actual mixing heating circuit nº 1 flow temperature. (BIO Hydraulic kit option only) Mixing heating circuit nº...

  • Page 41: Setup Menu

    14 SETUP MENU "Setup menu" consists of operating parameters of the boiler which can be adjusted by the user (Timer programming, time setting, ...) “Setup menu" To access to the press . Browse through the menu by pressing the symbols "+" or "-" (18) of heating .

  • Page 42: Timers Programming Process

    DualTherm 14.1 Timers programming process DualTherm boiler allows setting 3 different timers: boiler timer, CVS Suction System timer (if there “Technical is any connected) and DHW recirculation pump timer (if this function is activated on the Menu”) . The default setting for the timers is disabled ("- - - -"), so the functioning that is regulated by each timer will operate 24 hours.

  • Page 43: Dhw Recirculation Function Timer Programming

    permanently. 14.4 DHW recirculation function timer programming (DHW tank option only) This timer is only displayed when the DHW recirculation function is selected in the multifunction relay parameter (P.20 = 2) of the ”Technical Menu” . It is used to adjust the switching on and off periods of DHW recirculation pump.

  • Page 44: Calibration Menu

    DualTherm 15 CALIBRATION MENU "Calibration Menu" consists of a number of processes and parameters that allow the correct set up of the boiler. “Calibration Menu" To access the , the boiler must be switched off by pressing tactile button. After having switched off the boiler press for 5 seconds to access to the menu.

  • Page 45: Feed Auger Filling

    15.1 Feed auger filling During the commissioning of the boiler, before calibrating the feed auger or if the hopper runs out of fuel, it is compulsory to fill of fuel the feed auger. By means of this parameter the feed auger will be filled of fuel, process required for a correct boiler functioning.

  • Page 46: Feed Auger Calibration

    DualTherm 15.2 Feed auger calibration By means of calibrating the feed auger the electronic controller of the boiler adjusts the optimum amount of fuel required to supply the burner and to produce the correct heat output and combustion. By means of this parameter the feed auger calibration procedure will be made, process required for a correct boiler functioning.

  • Page 47: Manual Setting Of Feed Auger Calibration

    15.3 Manual setting of feed auger calibration By means of this parameter the weight obtained in the feed auger “Manual setting of calibration procedure can be set manually. When feed auger calibration” "Calibration parameter is displayed ( ) on Menu" , press to access and set the value desired by pressing "+"...
  • Page 48 DualTherm Nº Parameter Display Access code (by default 1234) P.01 Boiler model P.02 Minimum boiler heat output (%) P.03 Maximum boiler heat output (%) P.04 General fan speed factor (%) P.05 Fuel for ignition (g) P.06 Fuel consumption (kg/h) Selecting the type of installation for the BT buffer P.08 tank (Only with buffer tank installed)
  • Page 49 Nº Parameter Display Heating circuit n. 2 K-factor curve P.12 (Bio Hydraulic kit option only) P.13 Boiler minimum temperature mode P.14 Minimum boiler temperature (ºC) P.15 Heating pump post-circulation time (min) DHW pump post-circulation time (min) P.16 (DHW tank option only) Legionella protection function P.17 (DHW tank option only)

  • Page 50: Entry And Set The Access Code ("Cod

    DualTherm Nº Parameter Display BIO Hydraulic Kit direct pump operating mode P.23 (BIO Hydraulic Kit option only) P.24 Reset default values P.25 Set access code Maximum heating flow temperature of mixed P.27 circuits (Only with the optional Hydraulic Kit Bio) BT buffer tank temperature hysteresis P.28 (Only with buffer tank installed)

  • Page 51: Boiler's Setup Parameters

    17.1 Boiler Model (P.01) Parameter P.01 displays the model of the boiler set at DIP-switch on the electronic board. P.01 = 25 => DualTherm 25 P.01 = 35 => DualTherm 35 17.2 Boiler heat output (P.02, P.03) The DualTherm boiler is configured to modulate the pellet burner power between a minimum and maximum power.

  • Page 52: Managing Bt And Bt-Duo Buffer Tanks

    DualTherm 17.6 Managing BT and BT-DUO buffer tanks (P.08, P.28) Parameter P.08 is used to set the type of hydraulic installation that has been used for the BT or BT- DUO buffer tank. This parameter depends on the installation and must be set by the installer once the buffer tank has been assembled.

  • Page 53: Heating Circuit's Setup Parameters

    18 HEATING CIRCUIT'S SETUP PARAMETERS DualTherm is equipped with an electronic controller to manage efficiently the automatic functioning of the boiler. It also has the following additional parameters to regulate the heating circuit connected. They only may be modified by a person with sufficient technical knowledge of the meaning of each “Technical Menu”...

  • Page 54: Dhw Installation Mode

    DualTherm 19.1 DHW installation mode (P.09) DualTherm could be set to be connected to a DHW production installation managed by a 3-way DHW diverter valve or by a hot water tank pump. These two operating modes can be selected by means of P.09 parameter: P.09 = 0=>...

  • Page 55: Anti-Frost Function

    20.4 Anti-frost function This function protects the boiler from freezing during cold weather periods. If the boiler temperature drops below 6 ºC, the heating pump will start running until the boiler temperature reaches 8 ºC. If the boiler temperature continues to drop below 4 ºC, the burner will start running, in order to heat the installation.

  • Page 56: Multi-Functional Relay

    DualTherm 21 MULTI-FUNCTIONAL RELAY (P.20) DualTherm is equipped with an auxiliary relay output that may be used to select a series of additional functions that increase the boiler performance, features and comfort of the installation. “Technical Menu” "multi- Several operating modes may be set at P.20 parameter of the to define the functional relay"...

  • Page 57: Cleaning The Ash Drawer

    DOMUSA TEKNIK shall not be liable for any damage caused to people, animals or property as a result of incorrect handling of the ash drawer or the ash itself.

  • Page 58: Air Adjustment

    DualTherm 23 AIR ADJUSTMENT The DualTherm boiler allows the manual adjustment of the secondary air. The aim of secondary air intake is to optimise firewood combustion while reducing emissions and improving boiler performance. By means of the firewood loading door regulator, the secondary air intake flow rate is regulated in the burning furnace.

  • Page 59: Safety Lock-Outs

    24 SAFETY LOCK-OUTS The boiler’s electronic controller may activate the following safety lock-outs to stop the boiler functioning in order to prevent serious damages. When any of these lock-outs occur, the boiler will switch off and an alarm code will be displayed on boiler's screen. IMPORTANT: If any of the safety lock-outs described below should occur repeatedly, switch off the boiler and put in contact with the nearest official Technical Assistance Service.

  • Page 60: Low Pressure Lock-Out

    DualTherm 24.3 Low pressure lock-out When this lock-out occurs, “E19” alarm code will appear on the digital display. The burner and the boiler's circulation pumps will switch off, cutting off the heating and water flow to the installation. This lock-out occurs when the pressure of boiler's water drops below the value set at P.19 "Technical menu"...

  • Page 61: Boiler Maintenance

    Various maintenance operations should be carried out at different intervals of time to keep the boiler in perfect working order. The yearly maintenance operations should be carried out by personnel authorised by DOMUSA TEKNIK. 27.1 Frequency of maintenance of the boiler and chimney The most important aspects to be checked are as follows: Nº...

  • Page 62: Burner Cleaning Procedure

    DualTherm 27.2 Burner cleaning procedure The following procedure is recommended for a correct cleaning of the burner:...

  • Page 63: Cleaning The Vents And Rear Ash Drawer

    27.3 Cleaning the vents and rear ash drawer The following procedure is recommended for correctly cleaning the vents: NOTE: Clean the rear ash drawer after cleaning the vents.

  • Page 64: Cleaning Of The First Step Of Smoke

    DualTherm 27.4 Cleaning of the first step of smoke The heat exchanger of the DualTherm boiler has a first step of smoke without automatic cleaning. The cleaning frequency of this step will depend on the type of fuel and amount of fuel used. Here are the steps to follow for access to cleaning.

  • Page 65: Boiler Water Characteristics

    27.7 Boiler water characteristics In areas with water hardness of over 25-30 ºfH, treated water must be used in the heating installation to avoid any scale deposits on the boiler. It should be noted that even a few millimetres of scale will greatly reduce the boiler’s heat conductivity, causing a major drop in performance. Treated water must be used in the heating circuit in the following cases: - Very large circuits (containing a large amount of water).

  • Page 66: Diagrams And Measurements

    DualTherm 28 DIAGRAMS AND MEASUREMENTS MODEL DualTherm 25 1460 1080 1005 1010 1085 DualTherm 35 1610 1230 1155 1100 1160 1230 IC: Forward Heating (1” H) RC: Backward Heating (1” H) SH: Fume Output (Ø150 mm) V: Empty VS: Safety Valve ½”...

  • Page 67: Connections Diagram

    29 CONNECTIONS DIAGRAM 29.1 Boiler DualTherm L: Phase. Sh: Flue (thermopar). N: Neutral. Ra/Sa: DHW tank option resistance. AX: Feed auger. Rbt/Sbt: Resistance for BT tank Option. V: Fan. RT: Remote relay. LPH: Heat exchanger cleaning device. Sv: Fan speed sensor. Bbt: BT buffer tank charging pump.

  • Page 68: Burner

    DualTherm 29.2 Burner Qout: Burner outputs connector. R: Ignition heater. LC: Burner ash cleaning device. : Closed switch. : Open switch. Qin: Burner inputs connector. FCq: Burner switch. FR: Photocell. FCp: Ash cleaning device switch.

  • Page 69: Electrical Diagram

    30 ELECTRICAL DIAGRAM TS: Safety thermostat. Qout: Burner outputs connector. TE: Fuel entrance safety thermostat. Qin: Burner inputs connector. Cv: Fan capacitor. LCD: Display communication connector. SPW: Water pressure sensor. J4: Communication connector. : Furnace door limit switch S1, S2: Boiler model DIP-switch. SPA: Air pressure sensor.

  • Page 70: Technical Data

    DualTherm 31 TECHNICAL DATA MODEL DualTherm 25 Dualtherm 35 Maximum heat output Efficiency at maximum heat output 90.0 90,7 Minimum heat output 10,5 Efficiency at minimum heat output 88,2 90,4 CO at maximum heat output (10% O mg/m OGC (organic gaseous substances) at...

  • Page 71: Circulation Pump And Pressure Drop

    32 CIRCULATION PUMP AND PRESSURE DROP DualTherm boiler can be installed with a circulation pump supplied by DOMUSA TEKNIK. This pump can be a conventional pump or a high efficiency circulation pump. 32.1 High efficiency circulation pump The high efficiency circulation pump allows savings of up to 70 % in energetic consumption in comparison to conventional pumps.
  • Page 72 DualTherm Min. For the appropriate sizing of the hydraulic installation, as well as the pump operation curves, the pressure loss caused by the boiler should be taken into account. The following graph describes the load loss curves of the boiler: Presure drops DualThe DualThe...

  • Page 73: Spare Parts List

    33 SPARE PARTS LIST Boiler No. Code Description No. Code Description RQUEBIO016 BIOCLASS HM 25 Burner SEPO002397 Roof RQUEBIO018 BIOCLASS HM 43 Burner SCHA011882 Front fastening SEPO003005 Boiler left side panel (25) SELEDUA000 Front SEPO003010 Boiler left side panel (35) CTOR000073 Threaded screw lock RALMDUA000...
  • Page 74 DualTherm Boiler 17 18...
  • Page 75 No. Code Description RCON000953 Heat exchanger RCON000954 DUALTHERM 25 internal supply line CELC000333 80ºC bimetallic thermostat CVAL000034 ½ drain wrench with chain CELC000460 Type J thermocouple SAIS000175 Insulator for fan box SCON001386 DUALTHERM 25 manifold housing RCON000956 SEPO002382 Fan protector CVAL000017 HH ½...
  • Page 76 DualTherm Hopper Nº. Code Description Nº. Code Description SEPO002395 Rear top cover CTOR000127 DIN-912 M8x25 screw SEPO002393 Lateral panel (25) CFER000020 Handle SEPO002629 Lateral panel (35) SEPO002892 Top cover CTOR000214 PH 4,2x13 screw SEPO002402 grate CFER000002 Pivot cover PL/126-P SEPO001430 Cover for the oval CFER000045 Fastener...
  • Page 77 Heat exchanger camshaft system Dualtherm 25 Dualtherm 35 No. Code Description CFOV000134 YN 60 motor CTOE000370 Deflector coil (25) CTOE000383 Deflector coil (35) CTOR000064 Screw Cab. Allen DIN-912 M3x40 CTOR000132 DIN-9021 flat washer SCON000305 Plate sub-unit (25) SCON001484 Plate sub-unit (35)
  • Page 78 DualTherm Feed auger No. Code Description CFOV000136 25W motor transmission 1/180 CFOV000142 YN 80 condenser SEPO001637 Fixing plate SCON000579 Feed Screw 25/43 SEPO001612 Feed tube 25/43 CFER000019 Bracket STUR000030 DUALTHERM anti-static flexible tube RALMDUA000 Supply line...
  • Page 79 Burner 42 21 29...
  • Page 80 DualTherm Nº. Código Name Nº. Código Name SCON000935 Burner body (25) CFUR000032 Burner cleaner (25) SCON001084 Burner body (35) CFUR000033 Burner cleaner (35) MAIS000162 Top insulation (25) RCON000008 Rack sub-unit (25) MAIS000163 Top insulation (35) RCON000009 Rack sub-unit (35) SEPO002175 Connectors support CTOR000266 DIN-912 M5x16 screw...
  • Page 81 Manual ash dump No. Code Description 1 SEPO002577 DUALTHERM ash dump handle sub-unit 2 SEPO002434 Ash dump cover 3 CTOR000232 DIN-7981 threaded screw lock 4 CTOR000282 DIN-7380 Allen red. cab. screw 5 SCON001416 Manual ash dump with insulators 6 SCON001403 Rear ash dump 7 CTOE000299 Lever bushing...
  • Page 82 DualTherm Electrical board Burner SELEDUA001 SELEDUA000...
  • Page 83 Code Description SEPO002396 DUALTHERM cabinet SEPO002333 Cover CELC000304 4-pole female connector (inputs) CQUE000041 7-pole female connector (outputs) SCHA009150 Ground plate CELC000234 Evolution probe CELC000022 Safety thermostat 100ºC CFOV000133 Fan condenser (2x10^-6 F) REBI462200 CCDPE boiler control card PL/625-P CTOE000015 M4 countersunk coupling CTOR000155 DIN-7991 Allen plane cab.
  • Page 84 DualTherm Door No. Code Description 1 SEPO002426 DUALTHERM door 2 SEPO002427 Spyhole buffer 3 COTR000072 Spyhole glass 4 CAIS000017 Spyhole joint 5 SEPO002428 Spyhole cover 6 CTOR000285 M5x16 blued Allen screw 7 SCHA011349 DUALTHERM door handle 8 CFER000302 M10 round knob 9 CFER000297 Boiler door bushing 10 CFER000298...
  • Page 85 Wiring Power supply card Display card Nº. Code Name CELC000343 Communication cable CELC000353 Thermostat cable CMAZ000123 Wiring harness CELC000344 Burner output cable CELC000348 Air pressure sensor cable CELC000467 Short burner inlet hose CELC000349 Water pressure sensor cable CELC000468 Long burner inlet hose CELC000465 Door limit switch hose...

  • Page 86: Alarm Codes

    DualTherm 34 ALARM CODES DualTherm boiler is equipped with an electronic controller that performs continuous self-testing to detect any boiler malfunctioning. When it detects a functioning error, this is indicated by an alarm code on the display. The table below shows the list of the alarm codes: CODE ALARM DESCRIPTION E-01...
  • Page 87 CODE ALARM DESCRIPTION The pressure of water in the installation drops below the minimum pressure set at P.19 parameter of the·” Technical Menu ” (by default 0,5 bar). The boiler will lock out. To unlock it, fill the installation again up to 1 - 1.5 bar. E-19 Low water pressure.
  • Page 88 DualTherm CODE ALARM DESCRIPTION Underfloor temperature sensor open circuit, E-32 Underfloor temperature sensor is damaged or disconnected. Sr2. Contact your nearest official technical assistance service to Underfloor temperature sensor short- have it replaced. E-33 circuited, Sr2. Outdoor temperature sensor open circuit, E-34 Outdoor temperature sensor is damaged or disconnected.
  • Page 89 CODE ALARM DESCRIPTION Check the correct operation and connection of the air pressure sensor and that the burner and ash drawer are E-53 Insufficient air depressure with firewood correctly placed in the boiler. If this alarm occurs repeatedly, you should contact the nearest official Technical Assistance Service.
  • Page 90 DualTherm NOTES: ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
  • Page 91 NOTES: ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
  • Page 92 HEADQUARTERS & FACTORY Apartado 95 Bº San Esteban s/n 20730 AZPEITIA 20737 RÉGIL (Guipúzcoa) Tel: (+34) 943 813 899 www.domusateknik.com DOMUSA TEKNIK reserves the right to make modifications of any kind to its product *CDOC001597* characteristics without prior notice. CDOC001597 01/19...

This manual is also suitable for:

Dualtherm 35

Table of Contents