Webasto
Air
Top
Installation
Guide
–
AT2000STC
8
Air
Top
2000STC
Installation
Guide
2020
|
Webasto
Thermo
&
Comfort
Australia
Pty
Ltd.
3
Electrical
System
3.1
Main
Harness
Do
not
cut
or
extend
the
controller
wiring
harness.
This
will
void
the
warranty.
If
an
extension
is
required
for
the
control
element
plug
(Fig
12)
(X9),
an
extension
harness
is
available
from
Webasto.
We
only
recommend
extending
the
battery
positive
(red)
and
negative
(brown)
wires.
Correct
wire
size
of
6mm
to
be
used
to
avoid
any
current
or
voltage
drop
in
the
circuit.
Ensure
that
the
main
plug
is
properly
“home”
in
the
ECU
(Fig
12)
(3).
The
main
positive
(red)
and
negative
(brown)
has
to
be
directly
connected
to
the
house
battery
and
NOT
via
a
master
switch
to
ensure
correct
shut
down
cycle
of
the
heater.
Number
Function
1
Fuse
Holder
2
Red
Wire
(Battery
Positive)
3
Main
Plug
4
Brown
Wire
(Battery
Negative)
5
620
Ohm
Resistor
6
Rotary
Controller
(Potentiometer)
7
Multi
‐
control
digital
Fig
12
–
AT2000STC
Main
Harness
connections
1
2
3
4
5
6
7
