Page 1: ...92 WORCESTER GREENSTAR 30CDi GC NUMBER 47 311 93 WORCESTER GREENSTAR 37CDi GC NUMBER 47 406 08 WORCESTER GREENSTAR 42CDi GC NUMBER 47 406 10 LlOUID PETROLEUM GAS WORCESTER GREENSTAR 25CDi GC NUMBER 47 311 96 WORCESTER GREENSTAR 30CDi GC NUMBER 47 311 97 WORCESTER GREENSTAR 37CDi GC NUMBER 47 406 09 WORCESTER GREENSTAR 42CDi GC NUMBER 47 406 11 INSTRUCTION MANUAL INSTALLATION COMMISSIONING SERVICIN...
Page 2: ... USED WITH ANY OTHER MAKE OR MODEL OF APPLIANCE THE INSTRUCTIONS APPLY IN THE UK ONLY AND MUST BE FOLLOWED EXCEPT FOR ANY STATUTORY OBLIGATION THIS APPLIANCE MUST BE INSTALLED BY A COMPETENT PERSON FAILURE TO INSTALL CORRECTLY COULD LEAD TO PROSECUTION IF YOU ARE IN ANY DOUBT CONTACT WORCESTER BOSCH TECHNICAL HELPLINE DISTANCE LEARNING AND TRAINING COURSES ARE AVAILABLE FROM WORCESTER BOSCH PLEASE...
Page 3: ...ANCE 24 FIniNG THE APPLIANCE BOILER CONNECTIONS 25 FLUE INSTALLATION 26 28 CONDENSATE CONNECTION 29 ELECTRICAL 30 POSITION OF WIRED COMPONENTS 31 COMMISSIONING PRE COMMISSIONING CHECKS 32 FILLING THE SYSTEM 33 STARTING THE APPLIANCE 34 WATER TREATMENT 35 COMMISSIONING 36 FINISHING COMMISSIONING 37 SERVICING SPARES INSPECTION AND SERVICE 38 42 REPLACEMENT OF PARTS 43 52 SEHING THE GAS AIR RATIO 53 ...
Page 4: ...liance IMPORTANT The service engineer must complete the Service Record in the Benchmark section after each service Gas Safety Installation Use Regulations All gas appliances must be installed by a competent person in accordance with the above regulations Failure to install appliances correctly could lead to prosecution The appliance must be installed in accordance with and comply to the curren Gas...
Page 5: ...eel inner frame Digital control system Automatic ignition Direct burner ignition Built in frost thermostat boiler protection Built in fault finding diagnostics Modulating automatic gas valve Combustion air fan with speed regulator CH temperature sensor control Pump anti seizure protection Aue gas temperature limiter Condensate trap syphon DHW flow sensor temperature control Plate type DHW heat exc...
Page 6: ... 58 83 58 87 58 Flue Gas Temp 40 30 C rated min load C 51 33 55 33 60 35 66 35 51 33 55 33 60 35 66 35 CO2 level at max rated heat output C o 9 6 9 6 9 7 9 7 11 5 11 5 11 5 11 5 CO2 level at min rated heat output 9 0 9 0 9 1 9 1 10 5 10 5 10 5 10 5 NOx class 5 5 5 5 5 5 5 5 Condensate Max condensation rate 2 3 2 7 2 7 2 7 2 3 2 7 2 7 2 7 pH value approx 4 8 4 8 4 8 4 8 4 8 4 8 4 8 4 8 Electrical E...
Page 7: ...IN 11 CH RETURN 12 CHARGING LINK ASSEMBLY 13 GAS INLET CONNECTION 22 mm COMPRESSION 14 COVER FOR EXTERNAL WIRING CONNECTIONS 15 CONTROL PANEL IN SERVICE POSITION 16 ACCESS COVER FOR TRANSFORMER PCB 17 DHWOUT 18 CHFLOW 19 TRAP I SYPHON OUTLET CONNEC TION 22 mm PLASTIC PIPE 20 INLET PRESSURE TEST POINT 21 TRAP I SYPHON 22 GAS VALVE 23 DHW TEMPERATURE SENSOR 24 AIR I GAS ADJUSTMENT SCREW 25 TESTING P...
Page 8: ... I I I t t t I I I I I I I I 40 I I 46 I I I I t 45 I I I I I 42 I 41 I 9 4 3 l 48 CH TEMPERATURE CONTROL I 49 MAINS ON OFF INDICATOR DIAGNOS I TIC LIGHT BLUE I t 50 DHW TEMPERATURE CONTROL I 51 CENTRAL HEATING BOOST BUTTON 52 SERVICE BUTTON 53 BURNER ON INDICATOR LIGHT GREEN 54 MASTER SWITCH ON OFF 55 HOLIDAY BUTTON 56 ECO BUTTON 57 FAULT RESET BUTTON 58 SYSTEM PRESSURE GAUGE 59 POSITION FOR OPTI...
Page 9: ...WER FLUSHING MACHINE TO AID THE CLEANSING PROCEDURE BEFORE INSTALLING A NEW BOILER CLEANING THE PRIMARY SYSTEM Fill the system with cold water and check for leaks 2 Open all drain cocks and drain the system S Close drain cocks and add a suitable flushing agent at the correct strength for the system condition in accordance with the manufacturer s instructions Circulate the flushing agent before the...
Page 10: ... Pressure Minimum mains water pressure 1 5 up to 2 5 bar see technical data on page 6 for maximum performance Maximum mains fed water pressure 10 bar If necessary fit a pressure reducing valve IMPORTANT Non return back flow pre MAINS WATER EXPANSION VESSEL vention devices including those associat A Mini expansion vessel part No 7 716 102 105 ed with water meters fitted to the mains 8 Mains water i...
Page 11: ...uirement for energy conservation purposes to recom mend to the customer that a TRV is fitted to each radiator o An automatic bypass may be required downstream of the pump in order to main tain the minimum flow rate through the appli ance o A drain cock is required at the lowest point on the system An air vent is required at the highest point on the system SHOWERS BIDETS o If a shower head can be i...
Page 12: ...ld this not be possi ble and the only available route is external the following conditions should be observed Pipe work length should be kept to a minimum and the route as vertical as possible Where pipe work could be subjected to extreme cold or wind chill a weather proof insulation should be used Altematively the condensate pipework could be increased to a minimum 32 mm without the requirement 1...
Page 13: ...e airing space BOILER CLEARANCES The diagram opposite shows the mini space required to install and service the boiler VENTILATION This is a room sealed appliance and does not require any air for combustion from inside the property If the appliance is filted into a cup board or a compartment is built around the appliance after installation then the compart ment must be separated from the boiler spa...
Page 14: ...echnical Data for IP ratings IMPORTANT any switch or appliance control using 230 V mains electricity must not be able to be touched by a person using the bath or shower Electrical switches fused spur and socket outlets must not be situated in the bath room For further information about bathroom installa tions please consult Operational Procedures Part 20 Electricity 2250mm 6 720611927 13 10 INSfAL...
Page 15: ... pack PREPLUMBING With the plumbing manifold installed pipework can be installed to the valves on the manifold The system can be filled without the boiler being connected using the charging link assembly see page 23 The valves can be closed enabling the DHW and CH systems to be tested The boiler can be installed at later date RUNNING PIPES BEHIND THE BOILER If the boiler pipes are to be run behind...
Page 16: ...flat roofs 600mm R Below windows or openings on pitched roofs 2000mm The flue must not cause an obstruction Discharge and any noise from the flue outlet must not cause a nuisance Flue gases have a tendency to plume and in certain weather conditions a white plume of condensation will be discharged from the flue outlet Where this could be a nuisance for example near security lighting an alter nate p...
Page 17: ...ntal flue Only straight flue sections can be reduced in length and cut The flue terminal end can be fitted from the inside or outside of the building Fixing kits are supplied with the flue exten sion kits Horizontal 125 mm 0 and Vertical 100 mm and 125 mm 0 flue kits are available with separate instructions Contact your supplier or Worcester Bosch A C o f V B F C 1 bd A Standard horizontal flue 10...
Page 18: ...orizontal flue Only straight flue sections can be reduced in length and cut The flue terminal end can be fitted from the inside or outside of the building Fixing kits are supplied with the flue exten sion kits Horizontal 125 mm 0 and Vertical 100 mm and 125 mm 0 flue kits are available with separate instructions Contact your supplier or Worcester Bosch A C o 8 A Standard horizontal flue 100 mm 0 s...
Page 19: ...izontal flue Only straight flue sections can be reduced in length and cut The flue terminal end can be fitted from the inside or outside of the building FIxing kits are supplied with the flue exten sion kits Horizontal 125 mm 0 and Vertical 100 mm and 125 mm 0 flue kits are available with separate instructions Contact your supplier or British Gas A C o V B F Q A Standard horizontal flue 100 mm 0 s...
Page 20: ... can be reduced in length and cut The flue terminal end can be fitted from the inside or outside of the building Fixing kits are supplied with the flue exten sion kits Horizontal 125 mm 0 and Vertical 100 mm and 125 mm 0 flue kits are available with separate instructions Contact your supplier or Worcester Bosch A D fT Ii P V B F Jd A Standard horizontal flue 100 mm 0 shown B Straight flue extensio...
Page 21: ... If a sharp imple ment is used make sure the carton is not pierced and that the implement is used in such a way so that it may not cause person al injury All sharp objects must be covered or the blade retracted after use and put away in a safe place 1 The upper support is now removed with the components bcttom panel pre plumb ing manifold fixings documentation set charging link hanging bracket 2 T...
Page 22: ...hanging bracket with 3 screws supplied with the boiler Do not fully fasten the lower 2 screws Use the horizontal slots in the wall mounting plate to level the hanging bracket mark the 4th hole and drill I Fi and secure the hanging bracket with C both screws FLUE OUTLET Follow the diagram opposite to mark the centre of the flue for rear outlet 1 2 or for side outlet 2 3 Note increase this height by...
Page 23: ... turn the brass hexagon connectors 1 3 Ensure that the white plastic Control Screw on the Charging Link is turned fully into its closed position see diagram 1 3 Open the isolating valves on both the DHW inlet and CH return connections Insert the Charging Key initially aligning the arrow on the key with the unlock symbol on the Charging Link body Ensure that the key is inserted fully and turn to th...
Page 24: ...ace safely away from the working area It 5 Remove the protective wrapping C It 6 Lie the boiler on its back It 7 Remove the packaging base 8 and place safely away from the working area REMOVING OUTER CASE It 8 Loosen but do not remove the 2 screws E securing boiler casing at the bottom of the appliance It 9 Pull upwards to release the clip F on top of the boiler and pull the case upwards It 10 Rem...
Page 25: ...that this lifting 22mm 15mm 22mm 15mm 22mm I I operation is carried out by 2 people II _ observing all precautions for the safe lifting r 2 I of heavy objects I Do not lift by the top case panel There are fl r t I Ii I l two handling holes incorporated into the I f inner casing left and right in the lower sec K1G 1 r i I tion of the appliance I I I 4 Lower the control panel into the service I I I ...
Page 26: ...UE Standard Flue Ii Measure from the outside wall to the centre line of the flue turret length L Ii Subtract 52 mm from the length L to give the correct dimension to the flue elbow con nection Ii The terminal section shoVld be cut to this dimension however it must not be shorter than 250 mm Ii After cutting the end must be square and free from burrs to prevent damage to the flue seals 11nd II iliP...
Page 27: ...E I Length L 2380mm Subtract Standard Flue 634mm ip Subtract Turret 52mm gJ CJ I I I Subtract Full Extension 96Qmm Cut Length 734mm it i t I t I t 52mm 960mm 734mm 634mm Turret Extension Cut Length Standard Rue Required Length r NOTE Where extensions are reduced cut length which DQES NOT contain the seal Seal I 94mm I I 94mm I I I I I I I I ADDITION OF FLUE BENDS When flue bends are being used an ...
Page 28: ...ler or in flue kit E Extension Duct o A B C E This screw should be fitted last for easier installation FITTING THE TURRET Aue turret should push directly down and not be twisted into correct position Fit turret onto appliance and retain with three screws NOTE The clamping plate flat should be at the rear of the appliance ADDITIONAL NOTES AND REMINDERS Ensure that all cut lengths are square and fre...
Page 29: ...with weather resistant insulation to help prevent freezing Ensure that the condensate drain is 22 mm diameter plastic pipe It must fall at least 60 mm per metre towards the outlet An adapter A in 22 mm pipe is contained in the fitting pack ORCESTER INSTALLAno SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSfAR 25CDlISOCDilS7CD1I42CDi CONDENSATE CONNECTION 6720 613 700 2006 11 BOIlIdI Group ...
Page 30: ...ble over the main crossbar and through the cable clamp C ensuring there is ample cable to reach the connectors Turn cable clamping screw D clockwise to secure cable and replace clamp C into control panel 6 Mains power 230 V connection ST10 Separate wires from cable end and strip to 6mm Connect LIVE wire to terminal L Connect NEUTRAL wire to the terminal N Connect EARTH wire to the earth connec tor...
Page 31: ...ONTROL FlOWNTC FLUE OVERHEAT STAT FLOW TURBINE H t r DHW SENSOR o ST5 ST10 m Ii 1 5 Fus e slow A AC 230 V SPARK TRANSFORMER 230 V EXTERNAL FROST STAT OPTIONAl Fuse slow T 0 5 A 6 720612 485 01 1 0 WORCESTER INSTALLATION SERVlCIN61NSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 25COil30CDil37COil42CO POSITION OF WIRED Boa Group 6720 6 3 700a 2006 11 COMPONENTS ...
Page 32: ...the main gas supply check the gas pipework connections and rectify any leaks 3 Check that the pressure relief connector located on the right hand side at the bottom of the wall frame in its up position 4 Check that the condensate pipe has been connected to the adapter IMPORTANT If the boiler is not to be com missioned immediately then after sucess fully completing all of the checks and any rectifi...
Page 33: ...the system and correct any leaks The boiler integral expansion vessel is precharged to 0 75 bar equal to a static head of 7 5 meters 22 flj A Schraeder type valve is filled to the expansion vessel to allow for pressure adjustment if required If an extra expansion vessel is fitted to the central heating return adjust to the same pressure as the appliance internal expan sion tank refer to separate i...
Page 34: ... the flow temperature 3 Turn the CH temperature control C to maximum The burner on indicator D illumi nates GREEN when the burner has lit NOTES The first time the appliance is switched on a once only venting function is activat ed The heating pump then switches on and off at intervals This sequence lasts about 8 minutes The display shows shows 00 in alternation with the CH flow temperature The aut...
Page 35: ...Central Heating 5 I Check drain cocks are closed J and all radiator valves are open K before adding a suitable inhibitor or combined inhibitor anti freeze if the system is exposed to freez ing conditions to the heating system water L in accordance with the manufacturers instructions 6 I Fill via the built in filling loop to between 1 and 2 bar using the filling key M 7 II Vent all radiators retigh...
Page 36: ...Replace controls cover NOTE This boiler is designed with a differential of 20 C across the heating system I MPORTANT Do not continue commissioning until the correct gas inlet pressure is achieved If pressure is satisfactory press the central heating boost button L again and the boil er will return to normal operation If left in the central heating boost mode the control will return to normal opera...
Page 37: ...against the underside of the boiler and slide towards the rear until it is fully engaged HANOOVER Complete the Benchmark check list Open the facia cover by gently pressing the centre top of the cover 0 Set up the controls and show the user how to operate all the controls shown in the User Guide Place the user guide into the tray E on the inside of the facia cover If the appliance is unused and exp...
Page 38: ...on the particular installation conditions and usage However an annual service is rec ommended The extent of the service required by the appliance is determined by the operating condition of the appliance when tested by fully qualified engineers INSPECTION 1 Check that the terminal and the terminal guard if fitted are clear and undamaged 2 If the appliance is in a compartment or cup board check tha...
Page 39: ...e position I I I I I It __ 2 1 I 1 I 1 I I I I I I I I I I I I II I I Primary Heat Exchanger I I There is a special accessory kit available I specifically clesigned for cleaning the heat exchanger If required order 7 719001 996 3 Check fan pressure at the test point next to the fan using an electronic manometer The boiler must be run at maximum output Pressure will read negative and be greater tha...
Page 40: ... heating boost button L for 10 seconds and set Central Heating temperature to maximum I The central heating boost button will illumi nate continually The boiler will stay in this mode for 15 minutes unless the central heating boost button is pressed again 2 II Pull the cover off and connect a manome ter to the fan pressure test point II After measurement replace test point cover Pressure will read...
Page 41: ...G TO BS 7927 AND IS COMPETENT IN Irs USE To Clean the Heat Exchanger Remove outer case and base panel and isolate the appliance from power 1 Remove cleaning access cover 8 seal C and metal plate 0 securing it if pre sent 2 1 Loosen any deposits in the heat exchanger from top to bottom using the cleaning blade 2 2 Clean the heat exchanger from top to bot tom using the brush Refit the clean out cove...
Page 42: ...e and check for soiling and splits I Carefully refit diaphragm J the correct way round into the fan intake tube Note The flaps of the diaphragm 1 must open upwards I Re assemble burner in reverse order using a new seal K I Adjust gas air ratio Refer to section Setting the gas air ratio To Clean the Condensate Trap 5 1 I Pull condensate pipe out of the adapter 5 21 Remove trap from boiler I Clean t...
Page 43: ...control to service position 2 1 I Remove screw X securing control 2 21 Gently pull forward 3 Primary sensor I Press retaining clip on plastic moulding and pull upwards until clear of pocket in heat exchanger I Separate sensor from connector coat new sensor with heat conductive paste and replace 4 Overheat thermostat I Remove two electrical connectors from thermostat I Unscrew the sensor 5 Flue lim...
Page 44: ...nect electrical connections I Replace valve with new seals and check for gas soundness Note The valve wiJJ require setting follow pro cedure Setting the gas air ratio in the gas conversion section 8 Siphon 8 1 I Pull condensate pipe out of the adapter 8 21 Remove trap from boiler I Clean trap and check that the connection to the heat exchanger is clear I Fill the condensate trap with approxi matel...
Page 45: ...l of the control and remove panel 9 REPLACEMENT OF PARTS 1 I I 9 Access to boiler control I I components I r f Remove 3 screws A and remove cover from control I I I 10 I r I I I __ I I I I I I I 11 I I I I 1 I I I I _ I I I I I I I I I I I I I I I I I I I _ _ _ _ I WORCESTER INSTALLATION SERVICING INSTRUCTIONS FOR WORcESTER BOSCH GREENSTAR 25CDiI30CDiI37CDV42CDi REPLACEMENT OF PARTS 6 720 613 7 a ...
Page 46: ...onnection A I I Remove wire clip 8 from air gas I adjustment assembly e then pull gas I pipe down I I 12 2 Unscrew two screws D I 12 3 Remove fan from boiler I 12 4 Remove three screws retaining the I I air gas adjustment assembly E I Reassemble with new fan assuring that I I seals are correctly fitted I 13 Electrode assembly I Disconnect spark electrodes and flame sensor connection Remove two scr...
Page 47: ...xagon screws E securing the fan Slacken fully the rear securing bolt F 14 3 Remove air gas manifold I 14 4 Open air gas manifold I Carefully withdraw diaphragm J from fan intake tube and check for soiling and splits 15 Burner Remove the bumer H Replace new burner in correct posi tion Ensure that a new seal K is used f I J 15 I I I I I f I f I I I I I I I I I ORCES1ER INSTAlLATION SERVICING INSTRUC...
Page 48: ... the base of the inner casing 16 2 Remove return pipe at the bottom of heat exchanger 16 3 Remove screw at the top of the heat exchanger e Unscrew the flow pipe D 16 4 Undo flue connection E from sump F Pull flue pipe up Remove the heat exchanger INSTALLATION SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 25CO l3OCDif37CD l42 CD AORCESTER REPLACEMENT OF PARTS 6720 5 3 700a 2006 11 ...
Page 49: ...lve to the plastic housing 18 1 Withdraw the valve B and clean the valve chamber if necessary To refit follow the above in reverse Ensure any seals that have been dis turbed are renewed 19 Auto air vent I I Ensure the appliance has been fully I drained Use a screwdriver or similar to rotate t 1 191 iI C 192 19 1 the air vent anticlockwise X 19 2 Lift the air vent e out of the housing I I and remov...
Page 50: ...er Ensure the domestic hot water circuit is fully drained Disconnect the electrical connection to the turbine Remove the spring clip from the hous ing and move the brass pipe to one side 23 1 Withdraw the flow sensor and filter from the housing Using the cartridge tag withdraw the flow restrictor housing If the regulator housing has become stuck a pair of long nosed pliers may be used to grip the ...
Page 51: ...from above Undo the two screws securing the hydraulic block to the chassis located top left top right of the housing Lift the left hand side of the block slightly then manoeuvre the block out starting with the right hand side Take care not to snag the harness or pressure gauge bracket NOTE the block will still contain a small amount of water which will spill if the block is tilted To refit follow ...
Page 52: ...ve housing 28 2 I Withdraw the pressure relief valve Al I To refit follow the above in reverse Ensure any seals that have been dis turbed are renewed 29 DHW Heat exchanger I Remove the Hydraulic block from the boiler See Removing the Hydraulic Block 29 1 I Undo the two screws B securing the plastic housings to the heat exchanger 29 2 I Remove the heat exchanger I To refit follow the above in rever...
Page 53: ...d 10 minutes after firing the appliance Gas type JCO2 setting JC setting maximum minimum Greenstar 25CDi and 30CDi Natural gas I 9 6 O 2 I 9 0 O 2 LPG I 11 5 O 2 I 10 5 O 2 Greenstar 37CDi and 42CDi Natural gas I 9 7 O 2 I 9 1 O 2 LPG J 11 5 O 2 j 10 5 O 2 Check CO is less than 200 ppm Measure the inlet pressure it should be a minimum of 18 mbar for natural gas and 37 mbar for LPG 5 4 Set the cent...
Page 54: ...g Type E 15litre lightgreen WHS PartNo 87161058690 GCNo H31 959 12 Pressure relief valve DHW WHS Part No B 717 401 029 0 GCNo H02526 14 15 14 15 Pump assembly WHS PartNo 8716106 3540 GCNo H22463 Pressure gauge WHS Part No B 717 20B 107 0 GCNo H02528 Flow sensor WHSPart No B 716 107 223 0 GCNo H02529 16 17 16 DHW temperature sensor WHS Part No 8 714 500 OB1 0 GCNo H02538 18 Heat exchanger WHS Part ...
Page 55: ... when converting to an LPG appliance BS 5842 Domestic Propane Gas Burning Installations All conversions will require the air gas ratio to be set orrectly for the gas used The pro edure for setting the air gas ratio is at the rear of these instructions 1 Moving boiler control to service position I Remove boiler case as described on page 39 1 11 Remove screw X from retaining bracket 1 21 Lower contr...
Page 56: ...unication to TD200 or and RnO Check electrical connections bl Code plug not detected Insert code plug correctly test and replace if necessary C6 Fan speed too low Check fan lead and connector and fan replace as necessary E2 CH flow NTC sensor defective Check CH flow NTC sensor and connecting lead E9 EA FO F7 Safety temp limiter in CH flow has tripped Rame not detected Internal error Rame detected ...
Page 57: ...valve in CH position Pump ON f Jo speed Gas valve OFF Fan overrun 30 seconds Over temperature shut down if water temperature is 6 C above set value I IGNITION SEQUENCE see detail I GREEN FLAME 1 LIGHT ON 10 second stabilisation period IGNITION SEQUENCE YES Spark BURNER ignition LIT 4 seconds t r n LOCKOUT YES NO 5th attempt NO Stop spark Wait 10 seconds set temperature 36 88 C Fan gas modulation t...
Page 58: ... I POWER SWITCH i J ON BLUE LIGHT ON by flow turbine ECO button not Illuminated ie preheat requested AND 20 minutes since last pre heat demand AND temperature at least 100 below set point Set by pressing ECO button If pro grammerls fitted this is set by a com bination of programmer DHW demand and ECO button priority over all other demands PREHEAT f Joo DEMAND Diverter valve inDHW position Pump ON ...
Page 59: ...stat function HPump run 5 seconds I every 24hrs DHW demand active Holiday mode set to ON Frost protection active All other demands not active RCES1 ER INSTALLATION SERVICING INSTRUCTIONS FOR WORCESTER 80SCH GREENSTAR 2SCDil3OCOV37COV42COi PROTECTION FUNCTION 6720 613 700 2006 11 ...
Page 60: ...SSIONING SERVICING EXCELLENCE COMES AS STANDARD Worcester Bosch Group Cotswold Way Wamdon Worcester WR4 9SW Tel 01905 754624 Fax 01905 754619 Worcester Bosch Group is a trading name of BBT Thermotechnology UK ltd www worcester bosch co uk ...
