Water Heaters
Installation Instructions
BBW 46
DBW 46
Be sure to read these Operating Instructionsprior to putting the heater into operation.
9/1998
Page 1: ...Water Heaters Installation Instructions BBW 46 DBW 46 Be sure to read these Operating Instructions prior to putting the heater into operation 9 1998 ...
Page 2: ...BW 46 3 Connection to the Cooling System 5 Re Positioning of Circulating Pump 5 Fuel Circuit Connection 5 Combustion Air Supply 8 Exhaust Gas Pipe 8 Electrical Connections 8 Allocation of Telestart T60 9 Installation of Telestart Receiver 9 Circuit Diagrams 12 Initial Start Up 13 Technical Data 14 Version 15 BBW 46 DBW 46 I ...
Page 3: ...side of the bottom of the vehicle it must be positioned near the lateral or rear edge of the driver s cab or vehicle Exhaust pipes must be routed so that the possibility of ex haust fumes entering the interior of the vehicle is remote The functioning of any parts of the vehicle essential for its operation must not be impaired The openings of the combustion air inlet and exhaust gas outlet pipes mu...
Page 4: ...ct splashwater area of the wheels Type Plate The type plate must be located at a place where it is pro tected against damage and where it can be easily viewed once the heater has been installed or else a type plate du plicate is to be used The years not applicable must be removed from the type plate Mount The heater mount must be fitted to the vehicle body or the intermediate support by means of a...
Page 5: ...er pump of vehicle engine 4 Vehicle engine with standard equipment 5 Water heater 6 Battery 7 Fuse holder 8 Control unit 9 Relay for vehicle fan 10 Regulating valve of vehicle heating 11 Heat exchanger of vehicle heating 12 Vehicle heating fan 13 Switch for vehicle heating fan 14 Fuse bank in vehicle 15 Digital timer 16 Fuel extractor 17 Fuel metering pump 18 Exhaust silencer 19 Circulating pump B...
Page 6: ...hicle engine 4 Vehicle engine with standard equipment 5 Water heater 5A Non return valve 6 Battery 7 Fuse holder 8 Control unit 9 Relay for vehicle fan 10 Regulating valve for vehicle heating 11 Heat exchanger vehicle heating 12 Vehicle heating fan 13 Switch for vehicle heating fan 14 Fuse bank in vehicle 15 Digital timer 16 Fuel pick up 17 Fuel metering pump 18 Exhaust silencer 19 Circulating pum...
Page 7: ...ng of the sys tem is ensured During heating operation inadequate bleeding may lead to a malfunction due to overheating Re Positioning of Circulating Pump The circulating pump may be integrated into the water cir cuit either by installation at the location provided on the heater or at a heater remote location It is important that the correct direction of flow through the heater be observed water ou...
Page 8: ...For fuel extraction from flow or return lines it is imperative that the special Webasto fuel pick up see Fig 10 be used The fuel pick up is to be mounted so that any air or gas bubbles that may form are automatically discharged to ward the tank see Fig 10 Air or gas bubbles in the fuel line of the vehicle can form if there is a leak in the vehicle s carburettor or fuel pump or if the ambient tempe...
Page 9: ...es leading from the metering pump to the heater should not be routed in a downward pitch To prevent the fuel lines from sagging freely suspended lines must be secured Mounting should be performed in such a manner that the lines are protected against flying stones and thermal influence exhaust pipe Connecting Two Pipes Using a Hose The proper connection of fuel lines using a hose is shown in Fig 11...
Page 10: ...adius 50 mm The exhaust silencer is preferably to be mounted in the vi cinity of the heater It must not be installed near the combustion air intake opening Operation of the BBW 46 DBW 46 heater is also per missible without silencer The discharge opening of the exhaust pipe must not point in the direction of travel see Fig 14 Rigid pipes made of unalloyed steel with a minimum wall thickness of 1 0 ...
Page 11: ...way for tuning and thus allocating a second transmitter Retrofitting the T60 Telestart Receiver NOTE The BBW 46 DBW 46 water heaters can be retrofitted with the T60 Telestart remote control The retrofit kit T60 consists of the following parts Transmitter T60 with 2 alkaline LR1 1 5V batteries Standard antenna T6 Receiver T6 Mounting hardware bag comprising 2 sheet metal screws 1 receptacle housing...
Page 12: ...ling in the ve hicle roof and then directed to the right or left to the chassis member NOTE In the case of lack of space the antenna may be installed up to 15 cm off centre Clean windshield or rear window using grease dissolv ing cleaner e g methylated spirits Peel off protective film from antenna and glue antenna in place NOTE Do neither shorten nor sharply bend antenna cable Route antenna cable ...
Page 13: ... rt bl bl bl br br or or rt rt rt vi vi gn gn gn rt bl rt 87a 85 86 87 30 30 E1 E2 31 31 gn ws rt sw rt ws sw br br rt sw br br br 87a 87b 87 3 4 1 5 2 6 ϑ ϑ 1 9 7 8 8 7 6 4 5 4 1 6 3 1 2 3 12 2 2 11 1 1 2 2 10 5 Y A F4 F2 F1 F3 K6 R2 24V 12V A2 A4 S3 B3 W1 W1 W1 W1 M3 S2 S1 R1 A1 M1 X1 X1 X1 M2 B1 B2 X2 E K7 Fig 16 Automatic control circuit BBW 46 DBW 46 12V digital timer and Telestart T6 legend ...
Page 14: ...tal for presetting operating time R1 Resistor for part load operation R2 Resistor only required for 12 volt glow plugs in a 24 volt heater S1 Switch for vehicle fan S1 or S2 depending on vehicle S2 Switch for vehicle fan S1 or S2 depending on vehicle S3 Switch for circulating pump for separate activation V3 Diode in pos A2 V108 Transistor in pos A2 W1 Cable harness X1 Connector 12 pole X2 Connecto...
Page 15: ...inguished during operation fuel is de livered for max 90 seconds In the event of overheating fuel supply is immediately stopped CAUTION No visual indication occurs in the case of overheating Fault Lock Out Due to Undervoltage In the case of an undervoltage of 9 5 0 V in the case of 12 volt heaters or 19 1 V in the case of 24 volt heaters measured at the input of the control unit occur ring over a ...
Page 16: ...rising burner Heat output full load part load 4 6 kW 2 3 kW Fuel petrol diesel Fuel consumption full load part load 0 63 l h 0 23 l h 0 58 l h 0 29 l h Rated voltage 12 or 24 volts Operating voltage range 10 14 volts or 20 28 volts Rated power consumption without circulating pump without vehicle fan full load part load 44 W 33 W Max permissible ambient temperature Heater operation storage Control ...
Page 17: ... DBW 46 Supplementary Heater Water heater for diesel fuel Type BBW 46 Supplementary Heater Water heater for petrol fuel The BBW 46 DBW 46 water heaters are designed for 12 volt or 24 volt operation BBW 46 DBW 46 15 ...
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