2 General description Thermo Pro 90
203
2.4 Combustion pipe
The combustion pipe supports the combustion of the fuel-
air mixture, and as a result partially also the heating of the
heat exchanger.
2.5 Exhaust temperature sensor
The exhaust temperature sensor (ATS) is used to detect the
flame and impermissible exhaust temperatures.
2.6 Circulation pump
The circulation pump ensures the pumping of the coolant in
the vehicle and/or heater circuit. The pump is switched on
via the control unit and runs during the entire operating
phase (even in the control break, during run-on and during
the residual heat utilisation phase) of the heater.
2.7 Control unit
The control unit ensures the operating sequence and the
monitoring of combustion operation.
2.8 Metering pump
The metering pump is used for the heater fuel supply. In
addition, it also serves as a shut-off system with the heater
switched off.
The magnetic coil of the metering pump receives the pulses
from the microprocessor of the control unit.
Fig. 205 Burner head with combustion pipe
Fig. 206 Exhaust temperature sensor
Combustion pipe
Fig. 207 Circulation pump
To Next Page
