WEBASTO DBW SERIES HEATERS
Switching Off
When heating is no longer required, switch the Webasto heater off. The fuel solenoid valve interrupts the fuel supply
and combustion stops. The indicator light turns off. The Combustion air fan and the water pump continue operation
for approximately 150 seconds (after-run cycle) purging the combustion chamber of any fumes and cooling the
heater.
Engine Preheating
1. Set the timer 10 min. to 120 min. before you want to start the engine. The heater will start up at the set time.
(See timer operating instructions). Or switch the toggle switch or “Instant On” switch on your timer in the vehicle
dash to “On”. The heater will start up.
2. When the run time has elapsed on your timer or engine preheating is no longer required, switch the Webasto
heater “Off”. The heater will begin the after-run (cool-down) cycle.
NOTE:
Switching the Webasto heater on during the cool-down (after-run cycle) period is allowed. The heater will revert to
normal operational mode.
NOTE:
Make sure all coolant and cab heater valves are open before operating the heater in the preheat mode.
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OPERATING INSTRUCTIONS
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