The service book IV / ALFA 4 03-9940.186
continuously. Heating air is warmed by the heat exchanger walls and flows into the heated space. The
heater can be set to regulate on the performance or on the temperature by using the controller. When
controlling for performance using control sets the desired power. When controlling temperature the
performance is regulated by setting of the temperature. This regulation means that the heater is switched
off when heated space is overheated. Then the fan runs only. The heater is switched on again after falling
below the set temperature. The heater operation at a reduced speed (i.e. rolling speed) is indicated by a
flashing symbol on the controller. The heater after turning off vents (max.6min). During this time (i.e.
Deceleration) the exchanger is freed from the rest of the flue gas and cooled to about 80°C. Then the
electric motor switches off. Deceleration of the heater is indicated by flashing symbol on the controller.
In the event of a fault in the heating function is displayed E: number of the fault and flashing red LED on the
controller (see error messages).
Control
Operating instructions are contained in the document 03-9940.185 see annexes.
Detailed cables linking in the drawing no. 1020.6.50 see Annex.