Engine Heater SafeStart 420-423 series

DEFA 420, 421, 422, 423 are distinguished from the other series 400 heaters by two basic differences: The coolant chamber surrounds the heating element. A built-in thermostat limits the temperature. The thermostat regulates the coolant temperature and switches off the power supply to the element when the coolant has reached a temperature of 80°C at the intake/outlet of the heater. The thermostat switches the heater back on at 70°C.

Install the heater according to the enclosed installation guide. Install ONLY the heater on vehicles listed in the installation guide. Installing DEFA heaters must only be executed by authorized garages.

Use

Normal usage – DEFA engine heaters are designed for “normal usage.” DEFA defines “normal usage” as; 3 connections for 3 hours pr. 24 hours for 150 days (5 months) a year

Professional use – For use emergency vehicles or other vehicles where the heater is in use continually, yearly controls are necessary. It might be required to install a replacement heater. DEFA AS will not cover the yearly service cost.

NOTE! Pulse power – Some parking facilities use interval (pulse) power timers that turning the power On and Off several times per hour. Using a DEFA engine heater in combination with these timers is NOT considered “Normal use” and claims will be declined.