A
IR
T
OP
5000
5
I
NSTALLATION
5-13
5.9.1
General Information
NOTE:
Additional ducting components are available through Webasto distributors and dealers.
Where fresh air intake for heating is utilized, it must be installed so that under normal operating conditions exhaust gases
from the vehicles engine or the heater can not be drawn into the vehicle / compartment being heated.
When short runs of ducting are used, it is sufficient to use 80 mm (3.14 in.) I.D. Ducting. The maximum ducting length
on the heater should never exceed 15’ (inlet and outlet combined) with no more than 270° total bends. The maximum
pressure differential between the heaters air inlet and outlet is 1 in. water column (2.5 mbar). Exceeding this back
pressure will result in a overheat condition and the heaters temperature limiter (overheat sensor) is likely to respond.
Air outlet ducting or opening and return air ducting or opening should be separated by at least 24 in. or more to allow
proper temperature monitoring and consistency.
The integration of the heaters outlet into an existing vehicle or compartment ducting system is not permitted as over
heating of the heater will likely occur. Secondly, due to the high heat output of the AT 5000 heater, damage to the
vehicle or compartment ducting system is likely to occur.
Air inlet temperature to the heater must not exceed 104°F (40°C) or the temperature limiter is likely to respond.
Restrictions at the heaters inlet and outlet i.e. paper, clutter, etc. will also contribute to overheating.
KEEP THE AIR INLET AND OUTLETS CLEAR OF OBSTRUCTIONS!
CAUTION
Due to the high heat output of the Air Top 5000, it is not permissible to integrate the heater into the vehicle’s air ducting
system. Doing so will result in melting damage to the vehicle’s air ducting system.
5.9
Ducting the System
WARNING
Never use materials that are not approved for heat ducting systems such as PVC or similar materials as toxic off-gassing
from these materials can occur.
WARNING
Due to the risk of fire or explosion causing death or serious injury to personnel, Webasto air heaters are not to be used
for heating combustible, flammable and hazardous materials.
CAUTION
In vehicles designed for the transportation of passengers, the air outlet openings must be arranged in such a way that
they cannot be obstructed by passengers.
CAUTION
The heater outlet air temperature can reach 130 °C (266 °F). Do not point outlet towards heat sensitive material or
personnel. Keep outlet at least 305 mm (12 in.) away from heat sensitive materials and personnel.