Repair manual

7. Circuit Diagrams
7.1 General
The air heater Air Top 2000 Diagnosis may be operated
using the control element (rated value transmitter/switch)
or with the control element and a combination or
standard timer. The circuit diagrams (Figs. 703 to 708
and 714) show the possible circuits 12 or 24 Volt with
control element
combination timer
control element and standard timer
control element for TRS
combination timer for TRS
TRS operation for vehicles without auxiliary drive
Fig. 701 shows the terminal pin assignment.
X1 = Connection, Combustion and Heating Air Fan
X2 = Connection, Dosing Pump
X3 = Connection, Flame Sensor
X4 = Connection, Glow Plug
X5 = Connection, Temperature Limiter
The air heater Air Top 2000 without Diagnosis may be
operated using the control element (rated value transmit-
ter/switch) or with the control element and a timer. The
circuit diagrams (Figs. 709 to 713) show the possible cir-
cuits 12 or 24 Volt with
control element
control element and timer
control element for TRS
Fig. 702 shows the terminal pin assignment.
701
violet yellowbrownblack blue
X1 X4X3X2 X5
Fig. 701 Terminal Pin Assignment, Air Top 2000 Diagnosis
Air Top 2000 7 Circuit Diagrams