7215 3400 - 02/2006 GB (EN) For the user Users manual Gas wall hung Boiler condensing Buderus 500 - 24/S W Please read thoroughly before operating the unit
Introduction Please read these instructions and follow them carefully for a safe and economical use of your system boiler. Important general instructions for use This device should only be used for its intended purpose and in accordance with the regulations.
The Building Regulations, current I.E.E. Wiring Regulations and the relevant British Standard Codes of Practise. The device may only be used in combination with the units, accessories and spare parts listed in the installation and maintenance instructions. Other combinations of units, accessories and consumables are only to be used if they completely fulfil the specifications involved, and if system performance and safety are not affected in any way.
Contents 1 2 3 4 5 6 7 8 9 10 Safety precautions . . . . . . . . . . . . . . . . . . . 6 Installation area / boiler room . . . . . . . . . . 7 Working in the heating system . . . . . . . . . 8 Functions of the system and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . 9 Maintenance intervals . . . . . . . . . . . . . . . . 9 Conversion to LPG . . . . . . . . . . . . . . . . . . 10 Abbreviations . . . . . . . . . . . . . . . . . . . . . . 11 Permanent clearances . . . . . . . . . .
Preface Dear Customer, Your Buderus 500 Series wall-mounted condensing gas system boiler has been designed and built in accordance with state-of-the-art technological standards and the recognised safety rules. Special focus has been placed on operator convenience in this respect. Carefully read the safety instructions and operating manual to ensure safe, economic and ecologically beneficial use of the unit.
1 1 Safety precautions Safety precautions A DANGER! If you smell gas: 1) No naked flames ! Do not smoke ! 2) Avoid sparks ! Do not operate electrical switches.
Installation area / boiler room 2 A A I 2 Installation area / boiler room DANGER! The air intake and outlet openings must not be reduced in size or closed. DANGER! Do not store or use inflammable materials or liquids near the heating boiler. NOTE To prevent the boiler from being damaged, care must be taken not to contaminate the combustion air with halogenated hydrocarbons (e. g. contained in aerosol sprays, solvents, detergents, paints, and adhesives), or with high quantities of dust.
3 3 Working in the heating system Working in the heating system A DANGER! Only a CORGI registered Engineer is to be entrusted with the installation of this boiler, the gas supply and the flue connection. Commissioning, Servicing and any Repairs must be carried out by a competent person i.e.: a CORGI Registered Engineer. All CORGI Registered Installers carry a CORGI identification card and have a registration number. Both should be recorded in your boiler logbook.
Functions of the system and operating instructions 4 4 Functions of the system and operating instructions The installer should familiarize the user with the functions and operation of the heating system and ensure that a complete set of technical documentation is supplied.
6 6 Conversion to LPG Conversion to LPG The boiler is suited for natural gas. To convert the boiler to LPG you must contact a CORGI registered fitter. 10 http://www.buderus-domestic.co.
Abbreviations 7 7 Abbreviations DBA = Control unit (Dedicated Burner Automat) CH flow = Central heating flow CH return = Central heating return MCW = Mains Cold Water. http://www.buderus-domestic.co.
8 8 Permanent clearances Permanent clearances 8 mm 8 mm 21 mm 8 mm 21 mm The boiler must be located in an area with the following permanent clearances. fig. 1 12 http://www.buderus-domestic.co.
Permanent clearances I 8 NOTE The permanent clearances do not change if a wall spacing frame is used. The installer or service engineer must be able to create sufficient service clearences. These clearences should have been considered at time of installation. http://www.buderus-domestic.co.
9 DBA 9 DBA 4 5 3 6 2 7 1 fig. 2 14 DBA http://www.buderus-domestic.co.
DBA 9 Key to fig. 2 : item 1: item 2: item 3: item 4: mains switch "reset" button "service" button display item 5: item 6: item 7: "menu" button adjusting arrow up adjusting arrow down The boiler is equipped with a DBA. This is the internal control of the boiler. The DBA is located behind the access panel. The DBA allows you to operate the boiler and to make adjustments in its settings. DBA overview: 1. Mains switch (see fig. 2). Use this switch to turn the boiler on or off. 2.
9 DBA 3. Service Button "A" (see fig. 2) Is used for servicing purposes only. DO NOT use this button! 4. Display (see fig. 2) The display visualizes settings, adjustments and fault codes (see fig. 3). fig. 3 16 DBA display http://www.buderus-domestic.co.
DBA 9 5. Menu button "E" (see fig. 2) The menu button "E" allows you to scroll through the menu items. Pressing the E button once, the current DHW temperature (in combination with an external hot water cylinder) setting is displayed. Pressing the E button again gives the current setting of summer operation. Pressing the E button once more gives the current CH flow temperature setting. 6. and 7. Up "C" and Down "D" keys (see fig.
10 Initial start-up 10 Initial start-up 10.1 Preparing for operation Please also note the user manual supplied with the external time controls and thermostat. 10.1.1 Check water pressure z Check the pressure gauge (fig. 4, item 3) located at the bottom of the boiler for the current system pressure. Optimum system pressure is 1.5 bar. 3 1 CH flow fig. 4 18 2 GAS CH return Servicing valves http://www.buderus-domestic.co.
Initial start-up 10 10.1.2 Topping up the heating system WARNING! The wall-mounted condensing gas system boiler must not be activated at this stage. The system should be filled with untreated mains water. z Turn off the boiler by setting the mains switch to "0" (fig. 5, item 1). z If necessary open the CH flow and CH return servicing valves (fig. 4, item 1 and 2). A ON OFF 1 fig. 5 DBA – Mains switch http://www.buderus-domestic.co.
10 Initial start-up stop valve external MCW supply fig. 6 stop valve double check valve filling loop CH return Filling loop z Connect filling loop (accessory) (fig. 6). z Open both stop valves (fig. 6). z Fill the system to a pressure of approx. 1.5 bar (fig. 4, item 3). z Shut both stop valves. z Disconnect the filling loop. z Vent all radiators from air starting with the lowest radiator and working your way up to the highest point. 20 http://www.buderus-domestic.co.
Initial start-up 10 z Check the pressure after venting. If the pressure has dropped under 1.0 bar then top up the system as described previously. z Disconnect the filling loop and cap off. I NOTE If there are frequent water losses, have the system examined and repaired by a CORGI registered installer. Have the inhibitor concentration checked every year. http://www.buderus-domestic.co.
10 Initial start-up 10.1.3 Temperature-setting adjustments Setting the domestic hot water (DHW) temperature (in combination with an external hot water cylinder) z Press E button (see fig. 7, item 2) once then adjust the DHW temperature to the desired temperature (40 °C 60 °C) using the C and D keys (fig. 7, item 1). Factory setting is 48 °C.
Initial start-up 10 1 2 3 fig. 7 I DBA – Mains switch NOTE When summer operation is active then the boiler will not operate for central heating until summer operation has been deactivated. http://www.buderus-domestic.co.
10 Initial start-up Setting the flow temperature for CH z Press E button (see fig. 7, item 2) three times then adjust the flow temperature to the desired temperature (30 °C – 80 °C) using the C and D keys (see fig. 7, item 1). Factory setting is 80 °C. It is not possible to set the flow temperature when the boiler is set to summer operation. 24 http://www.buderus-domestic.co.
Initial start-up 10.2 10 Operational and fault codes Operating conditions and possible faults can be seen, pressing the C key. All codes not contained in table 1 should be noted down separately. These are malfunctions that require the presence of a CORGI installer.
Notes 11 Taking the system out of service z Push the mains power switch (fig. 5, item 1) to “0”. z Close the gas service valve by turning it clockwise (fig. 8, item 1). 1 1: Gas valve closed fig. 8 2 2: Gas valve open Gas service valve Frost protection The boiler has an automatic frost protection. When the CH flow temperature drops below 7 °C then the boiler will start up. 26 http://www.buderus-domestic.co.
Notes 11.1 Draining the system in case of frost It is not recommended, but if the boiler needs to be shut down for a longer period of time, then it is necessary to drain the system. Especially when there is a chance for frost conditions. z Turn off the boiler by setting the mains power to "0" (fig. 5, item 1). z Close the gas valve (fig. 8, item 1). fig. 9 Draining the system z Drain the system at its lowest point using the stop valves or radiator (see fig. 9).
W Customer Services Technical Product Support Tel: 0870 - 421 5933 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 http://www.buderus-domestic.co.uk Buderus is a trading name of BBT Thermotechnology UK Ltd. 721.
