4
1 General instructions and operating principle
AUTOTERM FLOW heaters are designed to be used for:
• pre-heating vehicle engines with liquid cooling systems at an ambient air
temperature of up to –45°С;
• defrosting windshields, heating cabins, cargo compartments, and other confined
spaces in vans, trucks, and maritime vessels with a central liquid heating system.
The heater operates independently of the vehicle engine.
The operating principle of the pre-heater consists of heating the fluid in the cooling
system, which is pumped through the heat exchanger system.
Fuel is supplied by a separate fuel pump from the fuel tank of the vehicle or vessel,
or from an additional fuel tank.
The heater can be powered by a vehicle battery or a separate battery.
The operation of the heater is controlled by the control unit, which controls the
temperature of the coolant fluid depending on its set parameters.
If the coolant temperature exceeds the set temperature, the heater switches to the
cooling mode: combustion stops, but the pump continues to circulate the coolant
throughout the vehicle’s heating system. As soon as the coolant temperature drops to the
pre-set temperature, the heater switches on again.
The liquid heater continues working for between 20 to 120 minutes (determined in
its settings), or until it is shut down. The purging duration is around five minutes.
Installation of the heater and its components must be carried out by
specialized organizations approved by AUTOTERM. Installation of the
heater must be carried out only by certified specialists in accordance with
the installation instructions.
If the heater is handled and/or installed improperly, there is a possibility of
fire hazard and damage to property because of the use of fuel and
electrical components. This is why all safety precautions and installation
instructions must be carefully read and followed.
