Webasto DBW 46 Wartungshandbuch PDF herunterladen (Seite 12)

BBW 46 / DBW 46

3 Functional Description

303

A no flame-up condition will cause an automatic

restart (30 sec run-down with glowing / 30 sec pre-

glowing / 90 sec safety period)

Switch on

Glow plug sampling

Preheating 30 sec

Flame sensor sampling

Fuel priming 5 sec

Safety period 90 sec

Flame

Full load

Vehicle air fan on

Part load

Optical run-down, max. 80 sec

Electronic run-down 60 sec

Control idle

Switch off

Vehicle air fan off

** Glow plug sampling not applicable for control units

with Ident. No. 439 789 (12 Volt) and 439 797 (24 Volt)

Glow plug

Circulation pump

Combustion air fan

Vehicle air fan

Dosing pump

Flame sensor

1a 2a 4 6 8 8 10 1013246

1 2 3 5 7 6 9 11 3 5 12 9

55 78 70 78 86 70°C

Fig. 301 Functional Diagram

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 39 40

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Webasto DBW 46 Wartungshandbuch Seite 12