7212 2900 - 02/2006 GB (EN) Installation and servicing instructions Gas wall hung Boiler condensing Buderus 600 - 11R / 19R / 24R Please read thoroughly For the installer
The boiler meets the basic requirements of the appropriate standards and directives. Conformity has been substantiated by the proper documents which - together with the declaration of conformity - are filed with the manufacturer. Subject to technical modifications! Constant development efforts may result in changes to illustrations, functional steps and technical data. Updating the documentation If you have suggestions for improvement or have found discrepancies, please do not hesitate to contact us.
Contents Preface 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 13 Technical specifications . . . . . . . . . . . . . . . . 13 Dimensions and connections . . . . . . . . . . . . 15 Boiler assembly - exploded view . . . . . . . . . 16 Items supplied with unit . . . . . . . . . . . . . . . . 17 Hanging the boiler . . . . . . . . . . . . . . . . . . . . 17 Pipe connections . . . . . . . . . . . . . . . . . . . . . 18 Flue Installation . . . . . . . . . .
Regulations and directives It is a requirement that all gas appliances are installed and serviced by a CORGI registered installer in accordance with the regulations. Failure to install appliances correctly could lead to prosecution. It is in your own interest, and that of safety, to ensure the law is complied with. The installation must also be in accordance with the latest I.E.E (BS.
It is not necessary to have a purpose-provided air vent in the room or internal space in which the boiler is installed. Neither is it necessary to ventilate a cupboard or compartment in which the boiler is installed, due to the low surface temperatures of the boiler casing during operation; therefore the requirements of BS 6798, Clause 12, and BS 5440:2 may be disregarded. If the boiler is used in an existing system any unsuitable additives MUST be removed by thorough cleaning. BS.
NOTE: notes relating to domestic hot water. The boiler must not be used for direct hot water supply. The hot water storage cylinder must be of the indirect type. Primatic cylinders are not recommended and must not be used on sealed systems. The hot water cylinder and ancillary pipework, not forming part of the useful heating surface, should be lagged to prevent heat loss and any possible freezing - particularly where pipes run through roof spaces and ventilated underfloor spaces.
Schematic pipework The boiler does not normally need a bypass but is required when using 2 port zone valves. Lock shield valves are required on the radiators in the area where the thermostat is situated. Air vent 22 mm open vent 15 mm cold feed Thermostatic radiator valves Alternative 2x2 port valves An automatic bypass is always required.
Buderus 600 Regular with external 230V connection (Y-plan) Key to abbreviations: AB = Automatic Bypass AV = Air Vent CB = Connection Block CBV= Cylinder Balancing Valve CHF = Central Heating Flow CHR = Central Heating Return CT = Cylinder Thermostat DV = Diverter Valve FEC = Feed / Expansion Cistern JB = Junction Box / RTH Converter LSV = Lockshield Valve PL = Permanent Live PM = Pump Prog= Programmer RT = Room Thermostat TRV = Thermostatic Radiator Valve WC = Wiring Centre FEC AV Cylinder CT CBV RT P
Buderus 600 Regular with external 230V connection and two port zone valves (S-plan) Key to abbreviations: AB = Automatic Bypass AV = Air Vent CB = Connection Block CBV= Cylinder Balancing Valve CHF = Central Heating Flow CHR = Central Heating Return CT = Cylinder thermostat FEC = Feed / Expansion Cistern JB = Junction Box / RTH Converter LSV = Lockshield Valve PL = Permanent Live PM = Pump Prog= Programmer RT = Room thermostat TRV = Thermostatic Radiator Valve WC = Wiring Centre ZV = Two port Zone Valve FE
4. Expansion vessel Sealed system requirements 1. General The installation must comply with the requirements of BS. 6798 and BS. 5449. All components of the system, including the heat exchanger of the indirect cylinder, must be suitable for a working pressure of 3 bar and temperature of 110 °C. Care should be taken in making all connections so that the risk of leakage is minimised.\ 2.
8. Filling The system may be filled through a temporary hose connection from a draw-off tap supplied from a servicing pipe under mains pressure. Where the mains pressure is excessive a pressure reducing valve shall be used to facilitate filling. The following fittings shall form a permanent part of the system and shall be fitted in the order stated: – A stop valve complying with the requirements of BS.
Hazard definitions and abbreviations Hazard definitions DANGER: Indicates the presence of hazards that will cause severe personal injury, death or WARNING! substantial property damage. WARNING: Indicates the presence of hazards that can cause severe personal injury, death or WARNING! substantial property damage. CAUTION: Indicates presence of hazards that will or cause minor personal injury or property CAUTION! damage.
Installation 1 Installation 1.1 Technical specifications 1 600 Series Buderus wall-mounted condensing gas boiler Dimensions Unit 11R 19R 24R GB II2H3P 20 mbar, 37 mbar (natural gas H, propane P) Type of gas supply as established in EN 437 (GB) Rated heating capacity for system temperature (modulating from 30° to 100°) Heating curve 75/60 °C Heating curve 40/30 °C kW kW 4.3 - 10.0 4.9 - 11.0 8.6 - 17.4 9.7 - 19.0 8.6 - 22.0 9.7 - 24.0 Seasonal efficiency (SEDBUK) % 90.3 90.3 90.
1 Installation 600 Series Buderus wall-mounted condensing gas boiler Dimensions Unit 11R 19R 24R Flue-gas system C13, C33, C53 Type of flue gas connection Standard diameter of flue gas system mm 60/100 Mains connection voltage V 230 Electrical power consumption Full/Part load W Electrical data 40/25 Electrical protection rating 40/25 40/25 IPX4D Boiler dimensions and weight Height x Width x Depth mm Weight (without casing) kg 23.5 23.5 23.5 Casing kg 5.5 5.5 5.
Installation CH RETURN Dimensions and connections CH FLOW 1.2 1 460 mm 50 mm 290 mm 105 mm 8 mm Ø100 mm 25 mm 20 mm 130 mm 145 mm 8 mm 8 mm 70 mm Ø60 mm 200 mm 230 mm 328 mm 700 mm 604 mm 695 mm 376 mm CH Flow CH return GAS CWDO = = = = GAS CWDO 82 mm 21 mm 119 mm Ø22 mm copper Ø22 mm copper Ø22 mm compression fitting Condensate water drainage outlet G1" OUTSIDE Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.
1 1.3 Installation Boiler assembly - exploded view Regular unit (11R / 19R / 24R) Legend 69 70 84 32 52 73 74 33 84 23 51 72 31 34 67 25 35 71 78 23 24 37 8 25 78 30 28 35 18 20 38 32 40 39 53 9 24 36 34 81 81 73 79 68 4 25 26 29 80 29 19 7 27 42 60 66 55 21 5 41 60 78 6 22 10 43 45 50 49 46 47 11 48 64 44 56 83 65 13 48 88 54 17 12 58 82 41. 57 85 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59.
Installation 1.4 1 Items supplied with unit z Check the contents against the packing list to ensure that no parts are missing. 2 4 Key to fig.
1 1.6 Installation Pipe connections 1 2 CAUTION! CAUTION! Ensure that all pipework is routed so as to minimise any strain on the boiler fittings. Buderus advises to use copper piping for the first 600 mm, then it is allowed to switch to another approved pipe material. z Take the CH flow connection pipe and the CH return connection pipe out of the box and connect to the condensing gas boiler (fig. 4, item 1 and 2).
Installation 1 If an external pipe run is unavoidable then the run should be insulated with water proof insulation limited to 3 m in length. Should this be exceeded then the pipework diameter should be increased to 32mm and the pipework insulated using weather proof materials. WARNING! WARNING! Any external run must be insulated with water proof insulation. It should be noted that the connection of a condensate pipe to a drain may be subject to local building controls.
1 Installation External termination via internal branch (e.g. sink waste) The condensate drainage pipe should have a minimum outside diameter of 1" with no length restriction. The connection should preferably be made downstream of the sink waste trap. If the connection is only possible upstream, then the air break is needed between the two traps. This is normally provided by the sink waste pipe (see fig. 7 and 8).
Installation 1.7 1 Flue Installation 1.7.1 Siting the flue terminal z O Terminal Position A. Directly below, above or alongside an opening window, air vent or other ventilation opening B. Below guttering, drain pipes or soil pipes C. Below eaves N A C N B,C B,C M A F K F F M G L K G E J H, I K G D F K L D. Below balconies or a car port roof Not recommended! E. From vertical drain pipes or soil pipes F.
1 Installation The air inlet/products outlet duct and the terminal of the boiler MUST NOT be closer than 25 mm to combustible material. Detailed recommendations on the protection of combustible material are given in BS. 5440- 1:2000.
Installation 1 Standard vertical flue pack (fig. 13): – item 1: Vertical flue terminal 60/100. – item 2: Weather collar – item 3: Flue support bracket – item 4: Vertical flue adaptor 2 3 1 4 Fig. 13 Standard vertical flue pack 1.7.3 Maximum Flue length (L) The maximum pipe length (L) of the air supply and flue gas exhaust pipes for the 600 Series condensing gas system boilers is determined by the total pressure loss of all components in the flue gas exhaust / air supply system.
1 Installation 1.7.4 Additional flue parts L The additional flue parts listed can be ordered from your supplier. Flue size 60/100: 60/100 flue system For every bend or extension the max. flue length (L) has to be reduced by: 500 mm extension 0.5 m 1000 mm extension 1.0 m 90° bend A Fig. 15 Horizontal flue length 1.4 m 45° bend 0.7 m NOTE The total reduction length must never exceed the maximum flue length.
Installation 1 1.7.5 Standard 100 mm flue systems The standard concentric flue system provides for a max. horizontal straight length of upto 7.5 m for 60/100 flue connection (see paragraph 1.7.3). Full instructions for fitting this flue are in subsection 1.7.2: "Air supply and flue gas exhaust in a closed installation" on page 22.
1 Installation 1.7.8 Installation of the horizontal flue The standard flue is suitable for lengths upto 660 mm (see fig. 18). For longer flue runs upto 7.5 m, extension air/flue ducts are available. Flue turret adaptor Terminal assembly Maximum length NOTE Use the wall-mounting template to help you mark the position of the side flue opening Outer Wall Fig. 18 Installation with horizontal flue gas turret 1.7.9 Flue duct preparation and assembly L z Measure the flue length L.
Installation 1.8 1 Electrical connections 1.8.1 Mains connection NOTE All Buderus boilers require a permanent live. A mains supply of 230 V - 50Hz is required. External controls are suitable for volt free or 230 V installation. Wiring to the boiler MUST be in accordance with the current I.E.E. (BS.7671) Wiring Regulations and any local regulations. ON OFF Wiring should be a 3 core PVC insulated cable, not less than 0.75 mm2 (24 x 0.2 mm), and to table 16 of BS.6500.
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Installation 1.9 1 External control connections The wall-mounted condensing gas boiler can be fitted with the following control devices: – A room-temperature control device at 230V connected to the RTH converter (see fig. 23, item 2) – ON/OFF temperature controller, volt free (see fig. 23, item 3). 1.9.1 External 230V controls (see also Y-plan and S-plan on page 8 and 9)" 1 3 WARNING! This appliance must be earthed.
2 2 Commissioning Commissioning When a boiler starts up there are a couple of things that happen. Below is a short process description: When there is a heat demand: The fan starts up and the glow ignitor turns on. When there is a DHW request then the three-way-valve switches from CH operation to DHW operation. Once all the requirements are met (glow ignitor is hot enough, fan is operating at the correct speed and the pump is on) then the gas valve will open.
Commissioning 2 z Light the boiler and heat the system to the maximum working temperature. Test for leaks. z Turn off the boiler and drain the system while still hot. z Refill and vent the system. z Adjust the initial pressure to the required valve. 2.2 Preparing the boiler for operation CAUTION CAUTION! DO NOT operate the condensing gas boiler if large amounts of dust are present, e.g. due to building work in and around the place of installation. 2.2.
2 Commissioning The display shows (fig. 26, item 2) “ -.” to indicate that the gas supply system is purged of air. Return chimney sweep switch to position “0”. 2 3 11 KW 1 10 0 1 1 2 1 10 1 Fig. 26 Display and chimney-sweep switch 2.2.3 UBA adjustments The boiler is equipped with a UBA. This is the internal control of the boiler. The UBA is located behind the door. 1 2 3 4 5 6 The UBA allows you to operate the boiler and to make adjustments in its settings. UBA overview: 1.
Commissioning 2 8. Heating capacity controller (see fig. 27, item 8) This controller is to set the maximum load. The highest setting corresponds to a maximum load of 100 % and the lowest setting corresponds to a maximum load of 30 %. 9. DHW temperature controller / Service capacity controller (see fig. 27, item 9) The function of DHW temperature controller is not applicable to this boiler. The function that remains is that of Service capacity controller.
2 Commissioning 2.2.5 Measuring the gas-supply pressure (working pressure) There are two ways to measure the gas-supply pressure: – measuring the standing gas-supply pressure (boiler not in operation); – measuring the working gas-supply pressure (boiler operating at full power). Gas nozzles Ø [mm] Type of gas supply Venturi tubes 11R 19R/24R Natural gas H (G20) 5.55 6.5 Standard LPG 3.40 4.
Commissioning 2 ATTENTION WARNING! If the required connection pressure is incorrect contact your gas supplier. z Ensure that all disturbed joints and connections are checked for gas tightness on completion of tasks. Fig. 30 Measuring the gas-supply pressure 2.2.6 Adjusting the flow temperature 3 2 NOTE Observe stickers attached to Venturi tubes. 11 KW z Adjust the knob (fig. 31, item 2) to the desired flow temperature (table 4) for your particular installation.
2 Commissioning Controller setting Flow temperature [°C] 1 40 2 44 3 48 4 53 5 58 6 62 7 67 8 71 9 76 10 80 table 4 Flow temperature 2.2.7 Setting the heating capacity z Open the cover to the 2nd operating level (fig. 31, item 1). Controller setting 11 R 19 R 24 R 1 4.9 9.7 9.7 2 5.6 10.7 11.3 3 6.3 11.8 12.9 4 6.9 12.8 14.5 5 7.6 13.8 16.0 6 8.3 14.9 17.6 7 9.0 15.9 19.2 8 9.6 16.9 20.8 9 10.3 18.0 22.4 10 11.0 19.0 24.
Commissioning 2.2.8 Check the gas/air ratio and adjust as required 2 3 z Turn power switch (fig. 32, item 2) and chimney sweep switch (fig. 32, item 4) to “0”. z Connect the positive port of the pressure gauge with a hose to the burner pressure measuring nipple (fig. 33). z Zero the pressure gauge. 4 11 KW z Unscrew the sealing closure of the burner-pressure testing nipple by one turn (fig. 33). 1 2 10 0 1 1 2 1 10 z Make sure that the system pump is running.
2 Commissioning 2.2.10 Function testing NOTE During initial start-up and annual servicing, make sure that all control, regulating and safety devices are in full working order and, if applicable, check for correct adjustment. Measuring the ionisation current (fig. 35) z Disconnect the system from the power supply. z Loosen the plug-and-socket connector of the ionisation electrode and connect the multimeter in series. On the measuring device, select the µ-direct current range.
Commissioning 2 4. Adjust room and cylinder thermostats and programmer to NORMAL settings. 2.2.12 Handing over After completing the installation and commissioning of the system the installer should hand over to the householder by the following actions: z Hand the User Manual to the householder and explain his/her responsibilities under the relevant regulations. z Explain and demonstrate the lighting and shut down procedures.
3 Inspection 3 Inspection 3.1 General directions Do a visual and functional test of the installation. 3.2 Preparing the boiler for inspection z Disconnect the boiler from the mains power supply. DANGER OF FATAL INJURY DANGER! due to electric shock when appliance casing is removed. z Before removing the appliance case: disconnect the heating unit at the emergency OFF switch or the corresponding circuit breaker of the house power supply.
Maintenance 4 4 Maintenance NOTE 1 The described cleaning of the burner and heat exchanger is only necessary when the boiler is heavily soiled. Otherwise it is sufficient to clean the burner and heat exchanger with a soft brush or compressed air without disassembling them. 2 4 3 Fig. 37 4.1 Loosen the union nut and remove the cable Clean the heat exchanger, burner and condensate trap 2 1 4.1.1 Cleaning the heat exchanger without dismantling z Disconnect the system from the power supply.
4 Maintenance z Remove burner gasket (fig. 39, item 1). z Remove rubber seal in heat exchanger by pushing upwards from inside (fig. 39, item 2). Fig. 39 Remove burner gasket and rubber seal Fig. 40 Remove burner z Remove heat exchanger by pulling upwards through the opening (fig. 40). NOTE Maintain the specified clearance of approx. 25 cm between the ceiling and the ventilation cover. z Remove the front of the heat exchanger. This is done by releasing the four snap catches at the sides.
Maintenance 4 CAUTION! CAUTION! The burner gasket must match the shape of the groove in the housing. CAUTION! CAUTION! Check the heat exchanger for leaks BEFORE reassembling the casing shells. 4.1.2 Cleaning the heat exchanger after dismantling z Disconnect the system from the power supply. z Close the gas service valve. z Loosen the retaining screw and remove the casing. z Close the heating shutoff valves and drain the system.
4 Maintenance z Remove burner and burner gasket (fig. 39, item 1, page 41) by pulling upwards through the opening (fig. 43, item 1). 1 z Remove the front of the heat exchanger by releasing the four retaining clips (fig. 43, item 2). z Remove the glow ignitor (fig. 41, item 1) and ionisation electrode (fig. 41, item 2).
Maintenance CAUTION Take care not to damage the insulation on the restrictor baffle. 4 1 WARNING! z Check to ensure that the heat exchanger has been fitted the right way round. The upper securing-pin groove must be horizontal (fig. 46, item 1). z Refit the heat exchanger by following the above procedure in reverse. Note the following: z The gasket between the front and back cover of the heat exchanger should normally be replaced.
5 Servicing 5 Servicing 5.1 Operating codes NOTE If the code displayed on the burner-control unit is not listed under the operating codes or fault warnings, the burner-control unit itself is malfunctioning. Display Display after pressing the service button 0 Buderus 600 - 11R / 19R / 24R is ready for operation A Burner interval circuit, 10 min.
Servicing 5.2 5 Fault codes Code Meaning 2C Safety sensor exceeds 95 °C Possible cause Action 1 Resistance in the installation is too high 2 Heating capacity is too large for the installation Adjust the heating capacity (see subsection 2.2.7) 3 Safety sensor is faulty Measure if resistance over the sensor is correct. If not replace safety sensor (see subsection 5.3.8, subsection 5.3.9, subsection 5.3.
5 Servicing Code Meaning 2U Temperature difference between flow and return more than 55 °C Possible cause Action 1 Flow sensor is dirty or faulty Check the sensor, replace if necessary (see subsection 5.3.11, subsection 5.3.12, subsection 5.3.13) 2 Problem with the pump or pump cable (flex) (no circulation) Check if the pump cable (flex) is faulty or if the pump is stuck. Replace pump if necessary.
Servicing Code Meaning 4F Safety sensor exceeds 95 °C Possible cause 5 Action 1 Resistance in the installation is too high Check if not all (thermostatic) radiator valves are clogged with dirt 2 Heating capacity is too large for the installation Adjust the heating capacity 3 Safety sensor is faulty Check the sensor and measure if resistance over the sensor is correct. If not replace safety sensor (see subsection 5.3.8, subsection 5.3.9, subsection 5.3.
5 Servicing Code Meaning 4Y Flow sensor interrupted Possible cause Action 1 Flow sensor faulty or disconnected 2 A short or bad connection in the cable harness Check the cable harness and/or connector of the sensor 3 UBA might be faulty Check the UBA by temporarily connecting a different UBA (see subsection 5.3.3) Code Meaning 6A F1 fuse defective, or no ionisation message after ignition Possible cause 1 Check the sensor and measure if resistance over the sensor is correct.
Servicing Code Meaning 6C Ionisation message, but no flame Possible cause 1 5 Action There is no flame, ionisation electrode doesn’t glow, fan is running – Check wiring of the glow ignitor, measure the resistance of the glow ignitor (should be between 50 and 300 Ohm). Replace glow ignitor if necessary (see subsection 5.3.14 and subsection 5.3.
5 Servicing Code Meaning 7A Voltage in burner-control unit too low (lower than 187 V~) or too high (higher than 246 V~) Possible cause 1 Action Regulating device may have to cope with interference – Check if for example induction fields interfere with the regulating device – Check if the are any peaks in the electrical network Code Meaning 7C Mains supply interrupted Possible cause Action 1 A problem with the mains supply Check the mains supply during operation (230V~) 2 Reset button pres
Servicing Code Meaning 8Y Gas fault Possible cause 5 Action 1 External switching contact (e.g. temperaturemonitoring device for underfloor heating has been tripped or gas pressure too low Code Meaning 9A System error Possible cause Check gas pressure detector is defective or the wires have not been properly connected to the back of the UBA (see subsection 5.3.
5 Servicing Code Meaning 9U KIM defective Possible cause Action 1 Kim connected incorrectly or KIM defective Code Meaning E with any character but P UBA defective Possible cause 1 Check the KIM connector and fan connector.
Servicing 5.3 5 Checking and replacing parts 5.3.1 Checking the flue gas thermostat z Detach plug-and-socket connection on cable to flue gas thermostat. Ensure that no cable is earthed (grounded) at any point. z Allow the flue gas thermostat to cool down. Activation temperature: Buderus 600 - 11R / 19R / 24R: 105 °C z Check flue gas thermostat for continuity. If continuity is not present, the flue gas thermostat is defective. z Replace any flue gas thermostat found to be defective.
5 Servicing 5.3.4 Checking the fan z Set the power switch to “0”. z Disconnect the fan's plug and socket connection. z Connect a multimeter (230 V AC). z Turn the power switch to “I”. z Take voltage reading at measuring device. If the voltage reading is 230 V, the power supply is in order. z Set the power switch to “0”. z If the power supply is in order, plug the unit in once more. z Turn the power switch to “I”. z If the fan now fails to run, it must be replaced.
Servicing 5 z Swivel the gas-air unit forward (fig. 54, item 1) 2 z Remove the gas-air unit from its bayonet connector and pull upwards to detach (fig. 54, item 2). 1 Fig. 54 Replacing the fan on the 600 Series: remove the gas-air unit Fig. 55 Replacing the fan on the 600 Series: replace the fan Fig. 56 Checking the wiring connections of the UBA z Detach the fan by loosening the 2 x 2 screws on the connection unit. z Replace the fan. z Refit by following the above procedure in reverse.
5 Servicing 5.3.7 Checking the miniature fuses 2 z Disconnect the system from the power supply. 3 z Loosen the two fixing screws and carefully turn the UBA around. 1 z Check miniature fuses (fig. 57) for correct functioning, or carry out visual inspection. If defective, fit new fuse (1.25 AT). Fuse Function 1 Glow ingitor 2 UBA, sensors, thermostat valve 3 UBA Fig. 57 Checking the miniature fuse Fig. 58 Buderus 600 - 11R / 19R / 24R: checking the safety sensor Fig.
Servicing 5 5.3.10 Checking the safety sensor connection lead Check to ensure that all plug-in connections on the sensor and UBA are in order. Note that an incorrectlyinserted plug can lead to the generation of error messages. Start up the boiler by pressing the “reset” button. 1 2 z Set the power switch to “0”. z Disconnect the system from the power supply. z Unplug cable connection from flow sensor (fig. 60, item 1). z Disconnect 18-pin plug from UBA (fig. 60, item 2).
5 Servicing Temp. Resistance Temp. Resistance [°C] [Ω] [°C] [Ω] 0 29,490 5 23,462 55 3,271.0 10 18,787 60 2,760.0 15 15,136 65 2,339.0 20 12,268 70 1,990.0 25 10,000 75 1,700.0 30 8,197 80 1,458.0 35 6,754 85 1,255.0 40 5,594 90 1,084.0 45 4,656 95 1,939.6 50 3,893 100 1,817.2 table 6 Resistance values for hot water / boiler sensor (approximate values) 5.3.12 Replacing the flow sensor z Shut the servicing valve.
Servicing 5 5.3.14 Checking the glow ingitor z Disconnect the system from the power supply. z Loosen the two fixing screws and carefully turn the UBA around. z Unplug and remove glow ingitor from UBA housing (fig. 64). z Check glow ingitor for free through-put. If through-put is free, the glow ingitor is in order. z If the glow ingitor is in order, plug the cable into the UBA housing. z Turn the UBA around and place back onto the bracket. z Tighten the two screws. Fig.
Notes 5.3.16 Measuring the ionisation current See subsection : "Measuring the ionisation current (fig. 35)" on page 38. 5.3.17 Replacing the ionisation electrode z Remove the gas-air unit. z Loosen the plug-and-socket connection of the ionization electrode. z Loosen screw (fig. 67, item 1) by a half-turn and slide bar to remove. 1 z Pull electrode to remove, and fit new unit. z Reassemble by following the above procedure in reverse. Fig. 67 Replacing the ionisation electrode 5.3.
Notes 6 Conversion to another type of gas WARNING! WARNING! Work on components in contact with gas must only be carried out by a registered CORGI engineer. Switch off the heating boiler z Disconnect the system from the power supply. z Close the gas service valve. z Loosen the 4 crosshead screws on the ventilation cover (fig. 69). z Remove the ventilation cover. Fig. 69 z Loosen union nut on gas valve assembly (fig. 70, item 4).
6 Conversion to another type of gas z Swivel the gas-air unit forwards (fig. 72, item 1). s z Pull the gas-air unit up and out of the bayonet connector (fig. 72, item 2) and remove via the front of the unit. 1 2 Fig. 72 Remove the gas-air unit Replacing a gas nozzle WARNING! WARNING! Conversion to another gas type is implemented by installing/removing a gas nozzle (fig. 73, item 3) of the appropriate gas nozzle diameter (table 7).
Appendix 7 Appendix 7.1 Short list of spare parts 7 The following are parts commonly required due to damage or expendability. Their failure or absence is likely to affect safety or performance of this appliance. For a pictorial representation of the part see the respective position number on the exploded view picture on page 16. Pos. Art. no.
8 Reports 8 Reports 8.1 Start-up report z Please check off the start-up tasks carried out and enter the corresponding readings. Initial start-up tasks 1. Type of gas: Remarks or measurement readings Natural gas LPG 2. Inspect to check for leaks (see subsection 2.2.1 on page 31) 3. Check combustion air/flue gas connection (see subsection 2.2.4 on page 33) 4. Checking the boiler equipment (change to another type of gas if necessary) (see subsection 2.2.4 on page 33) 5.
Notes Subject to modifications resulting from technical improvements! Buderus • http://www.buderus-domestic.co.
8 8.2 Reports Inspection and maintenance reports The inspection and maintenance reports provide an overview of all the tasks and operations carried out. Please check off the inspection and/or requirementrelated maintenance tasks carried out and enter the corresponding readings. See also Section 3: "Inspection“ on page 40 or Section 4: "Maintenance“ on page 41. z Sign details of inspection and maintenance tasks, indicating date carried out. Use only original replacement parts.
Notes Date: _________ Date: ___________ Date: ___________ Date: ___________ Date: ___________ _______________ µA _______________ µA _______________ µA _______________ µA _______________ µA _____________ mbar _____________ mbar _____________ mbar _____________ mbar _____________ mbar _______________ Pa _______________ Pa _______________ Pa _______________ Pa _______________ Pa ______________ ppm ______________ ppm ______________ ppm ______________ ppm ______________ ppm ____________
8 Reports Requirement-related maintenance tasks 1. Clean heat exchanger, burner, condensate trap and syphon (see subsection 4.1 on page 41) 2. Check and adjust the gas-air ratio CO2-content: at full load at part load (see subsection 2.2.8 on page 37) 3.
Reports 8 Date: ___________ Date: ___________ Date: ___________ Date: ___________ Date: ___________ ___________________ Pa ___________________ Pa ___________________ Pa ___________________ Pa ___________________ Pa ____________________ % ____________________ % ____________________ % ____________________ % ____________________ % ____________________ % ____________________ % ____________________ % Subject to modifications resulting from technical improvements! ____________________ % ____
Buderus Cotswold Way Warndon Worcester WR4 9SW Telephone: 01905 - 752 936 Fax: 01905 - 753 130 Customer Services: Tel: 0870 - 421 5933 Technical Product Support: Tel: 0870 - 421 5944 Sales: Tel: 01905 - 752 640 Fax: 01905 - 456 445 / 455 394 Returns: Tel: 01905 - 752 531 Fax: 01905 - 455 392 Spares: Tel: 01905 - 752 576 Fax: 01905 - 754 620 www.buderus-domestic.co.uk Buderus is a trading name of BBT Thermotechnology UK Ltd. 721.
