Webasto Thermo Pro 90, Установка оборудования

Страница: 9 / 55

Thermo Pro 90
2 General description
201
2 General description
The water heater has been designed for installation in com-
mercial vehicles. Depending on equipment, the ADR function
is provided for the 12 V and 24 V variant.
Parking heating
In parking heating mode, the water heater works together
with the vehicle's heating system for
• cab and engine preheating,
• use of residual heat from the vehicle engine.
The water heater works independently of the vehicle engine
and is integrated in the cooling system, the fuel system and
the electrical system of the vehicle.
Auxiliary heating
The water heater works during engine operation and provides
thermal assistance to the cooling system. The water heater is
integrated in the cooling system, the fuel system and the elec-
trical system of the vehicle.
When the engine is switched off, the water heater is automa-
tically switched off and fuel supply is interrupted within 5 se-
conds.
The heater operates fully automatically, controlled by the
coolant temperature.
The burner output is controlled within the limits between 1.8
and 7.6 kW depending on the deviation of the current coolant
temperature from the setpoint at the coolant temperature
sensor.
The heater switches off burner operation automatically
(pause) when the setpoint is exceeded and switches it back on
automatically when the temperature drops below the set-
point.
Actuation of the water heater with an external regulator (e.g.
room thermostat) is not permitted.
The Thermo Pro 90 heater mainly consists of the following
components:
–
Combustion air fan
– Heat exchanger
– Burner unit
– Coolant pump
The following control and monitoring components are inte-
grated in the heater:
–
Control unit
– Exhaust gas temperature sensor
– Glow plug
– Coolant temperature sensor
– Overheating protection
The burner motor speed is monitored by a Hall sensor inte-
grated in the control unit. Operation with a remote control
unit is therefore not possible.
The fuel is supplied externally by a fuel pump which is con-
nected to the vehicle fuel system.
Fig. 201 Heater components
4
1 combustion air fan
2 fuel connection
3 coolant outlet
4 coolant temperature sensor
5 heat exchanger
6 overheating protection
7 exhaust gas temperature
sensor
8 outlet, exhaust gas
9 combustion air inlet
10 U4840 coolant pump
11 coolant inlet
5
7
11
10
8
6
12
1 2 3
9