Operating instructions

1. Install exhaust deflector on heater exhaust outlet or install exhaust
pipe.
2. Route the exhaust system so that the possibility of discharged
exhaust gasses entering the vehicle is prevented.
3. Direct the discharge opening of the exhaust system in such a way as
not to be pointed in the direction of travel, and so located that the
possibility of clogging caused by snow, mud or debris is prevented.
4. Any condensation water collecting in the exhaust pipe must be
discharged. If necessary, drill a drain hole at the lowest point to
allow drainage.
4.5
Combustion Air Supply
Never draw combustion air from inside the passenger area of a
vehicle, or from areas where fumes and gasses can accumulate.
Where heater is installed in a sealed compartment, adequate
ventilation for combustion air requirements [4 in² (20 cm²)] must be
provided.
Combustion air can be drawn from a remote (protected) area in order
to provide a clean air supply.
For installations requiring remotely drawn combustion air, use
approved ducting with an unrestricted internal diameter no less than
2 1/4" (55mm) and a length no greater than 16’ (5m). The ducting
may have several bends totaling no more than 270° overall.
Approved combustion air ducting can be ordered through Webasto
under part number 887 29A.
To connect combustion air intake ducting [2 1/4" (55mm)] to the
heater, several types of fittings are available that snap directly onto the
combustion air inlet of the heater.
For a straight connection, order a straight adapter under part number
101 377 and snap it onto the combustion air inlet and attach air
ducting.
In the event there is insufficient room for a straight attachment, a 90°
snap-on fitting (P.N. 101 404) and an adapter ring (P.N. 823 15A) are
available. Simply snap them onto the combustion air inlet of the
heater and attach ducting.
For installations where ducting is not required, the heater is factory
equipped with a splash deflector that simply snaps onto the
combustion air inlet.
NOTE
Additional flexible exhaust
tubing Webasto part
number 479 721.
NOTE
Route the exhaust system
away from any parts of the
vehicle that may be
damaged by heat
(i.e., brake lines, electrical
wiring, hoses and fuel
lines).
WARNING
Never draw combustion air
from inside the vehicle, or
from areas where fumes or
gases can accumulate
NOTE
Approved combustion air
ducting can be ordered
under Webasto part
number 887 29A.
CAUTION
Combustion air ducting
must be non-restrictive.
Do not connect to existing
vehicle air ducting or
filtration systems.
4 Installation Thermo 230/300
402