Cold And Hot Air System; Information On Cold And Hot Air System; Cold Air Inlet And Hot Air Outlet; Cold And Hot Air Ducts - Webasto Air Top Evo 40 Installation Instructions Manual

4

Cold and hot air system

4.1 Information on cold and hot air sys-
tem
Do not connect the cold and hot air system of the heater to
X X
the externally controlled air routing systems (e.g. vehicle air
conditioning system).
Recirculated air mode and fresh air mode
The cold air can be drawn in from the outside (fresh air mode)
or inside (recirculated air mode).
Temperature control
The heater regulates the heating capacity depending on the tem-
perature of the cold air intake and the temperature set on the
control element.
For fresh air mode, an external temperature sensor
must be installed in the area to be heated.
Permissible pressure loss in the cold and hot air system
The pressure loss in the cold and hot air system must
be below the specified limits (see „12 Technical
data").
The heating capacity will be reduced if the limits are
exceeded.
4.2

Cold air inlet and hot air outlet

CAUTION
Risk of burn injuries due to insufficient distance
between hot air outlet and persons
Burn injuries
Make sure that persons cannot come in contact
X X
with hot surfaces.
Make sure persons are protected from the direct
X X
hot air flow from the heater.
ATTENTION
Reduced output by drawing in hot air
Fault in heating operation
Install cold air inlet such that the hot air from the
X X
heater or the hot air from the vehicle heating sys-
tem is not drawn in directly.
Air Top Evo 40 | Air Top Evo 55
Installation location requirements:
Fig. 07: Avoid air crossover between cold air inlet and hot air outlet
The installation location for the cold air inlet must satisfy fol-
lowing requirements:
■ Hot air is not drawn in from the vehicle's heating system.
■ Hot air is not drawn in from the heater.
■ Exhaust gas is not drawn in.
■ The installation location is protected from splash water and wa-
ter spray.
■ The installation location is above the maximum permissible for-
ding level of the vehicle.
The installation location for the hot air outlet must satisfy fol-
lowing requirements:
■ Persons cannot come in contact with hot surfaces.
■ Persons are protected from the direct hot air flow from the hea-
ter.
■ Heat-sensitive parts are protected from the direct hot air flow.
4.3

Cold and hot air ducts

Requirements relating to the hot air duct
Parameter
Thermal endurance
Recommended inside diameter of main hot air duct
Air Top Evo 40
Air Top Evo 55
Install cold and hot air ducts with minimal resistance to flow.
X X
Installing cold and hot air ducts
CAUTION
Risk of injury by rotating fan wheel
Lacerations
If no cold air duct is used: Install mesh guard over
X X
intake.
Value
min. 130 °C
(short-term min. 150 °C)
80 mm
90 mm
10