Technical data

Air Top 2000 ST Circuit diagrams

701

7 Circuit diagrams

7.1 General

The Air Top 2000 ST heater units can be operated with the

heater control (setpoint generator/switch) or a combination

timer.

The circuit diagrams (Fig. 702 to Fig. 705) show the possible

circuits for 12 or 24 Volt with

• Control element and vehicle blower

• Combination timer and vehicle blower

• ADR operation with control element

• Combination timer and electrical battery isolation

switch

Fig. 701 shows the plug assignment on the control unit.

Fig. 706 shows the schematic connection of the

combination timer.

See 7.2 for the legend of the wiring diagrams.

Fig. 701 Plug assignment

X1 = Combustion and hot air blower connection

X2 = Connection to glow plug

X3 = Overheating sensor connection

X4 = Metering pump connection

X5 = Flame monitor connection (only petrol heater)

X6 = Wiring harness connection