DEFA 700 series engine heater for Nissan, Renault, Volkswagen
DEFA supplies engine heaters adapted to liquid-cooled and air-cooled engines with low or high coolant volume. Our range includes engine heaters for passenger cars, vans, trucks, agricultural tractors and stationary engines. There are nine series of heaters differentiated depending on how they are mounted. The 700 series heater, number 411703, is installed in the engine cooling line of vans. The product includes all the necessary mounting accessories.
The DEFA engine heater heats the engine efficiently and effectively. Most heaters are mounted in such a way that the heating element is in direct contact with the coolant and ensures its slow circulation.
The product is protected by a fusible link that burns out when the temperature rises excessively. Burnout can be caused by:
- Coolant level too low (heating element is in contact with air).
- Air pocket all around the heating element (the heating element comes in contact with the air).
- Dirty or contaminated coolant creates an insulating layer (scale) around the heating element, blocking heat conduction.
The DEFA 700 Series engine heater can heat the coolant to approximately 50°C above the outdoor temperature, depending on and on the location of the heater and the capacity of the cooling system.
The optimal operating time depends on the outside temperature. After 3 hours at -17° C the system reaches a thermal equilibrium, which means that the energy supplied after this time is only for temperature maintenance. The extra heat is emitted to the outside. The DEFA 700 Series Engine Heater can remain connected to the power source without risk of damaging the heating element, however it will only result in unnecessary electricity consumption.