Operating instructions

4. Installation
4.1 General Information
Webasto will take you step by step through the installation process to
ensure successful operation for years to come. The installation must
be performed in accordance with the installation instructions provided
in this manual.
IMPORTANT! The proposed heater installation must be approved by
Webasto Thermosystems.
4.2
Installation Location
The heater and circulation pump are to be integrated into the coolant
system (or into a separate heating circuit, if applicable) of the vehicle.
The heater should be installed as low as possible in the coolant
system to assure static bleeding of the heater and the circulating
pump.
The heater is to be installed in a clean and dry environment, usually a
separate compartment, accessible for service, typically towards the
rear of the vehicle. The heater may also be located in the engine
compartment. The installation enclosure must provide adequate
ventilation for combustion air requirements [4 in² (20 cm²)].
When installing the heater, make certain that the clearances required
for accessing the unit for servicing are observed (e.g. removal of the
combustion chamber). See figure 301, page 302.
4.3
Mounting the Heater
1. Drill all required holes to dimensions shown in figure 301, page 302.
2. Bolt heater rigidly inside enclosure or engine compartment.
4.4
Exhaust Pipe Connection
Rigid exhaust pipe is recommended in installations where the use of
an exhaust deflector is not suitable. The exhaust pipe must have a
minimum internal diameter no less than 2 3/4" (70mm) and a length no
greater than 16’ (5m). The pipe may have several bends totaling no
more than 270° overall. Do not cut and weld pipe to make 90° angled
corners.
NOTE
This manual does not
cover all possible
installations. For special
applications use this
manual as a general
guideline only. Contact
Webasto Thermosystems
directly at 1-800-555-4518.
NOTE
The circulating pump is not
self priming.
WARNING
The heater must not be
installed in either the
driver’s compartment or in
the passenger area of
vehicles.
WARNING
Exhaust pipes must be so
routed that the possibility
of exhaust fumes entering
the vehicle is unlikely.
Thermo 230/300 4 Installation
401