Webasto DBW 2020 - Operation with 7-Day Digital Timer

Webasto Product N.A., Inc. 14 www.techwebasto.com
GENERAL DESCRIPTION DBW 2010/2020/300 COOLANT HEATERS
2.1.7 COMBUSTION AIR FAN (5) AND MOTOR (2)
The combustion air fan supplies the air necessary for
combustion.
There are two different fan designs in use:
DBW 2010 — lateral canal fan
DBW 2020/300 — radial fan
The motor, through a coupling, drives the combustion air
fan, and through a toothed gearing, the fuel pump.
Rated motor r.p.m.: DBW 2010 4500 RPM
DBW 2020 5000 RPM
DBW 300 5800 RPM
Figure 7: Combustion Air Fans
DBW 2010
DBW 2020/300
Drive motor
Fan wheel
Cap