Operating instructions

4.8 Wiring Connections
4.8.1 General Information
The control unit is equipped with low voltage protection, therefore it is
imperative to keep vehicle batteries in good condition.
Thermo 230/300 heaters are available in 24 volt configurations only.
4.8.2 Timer and Switch Connections
Fig. 407: On/Off Switch
Fig. 408: 7-Day Digital Timer Model 1531
4.8.3 Timer or Switch Installation
1. Select a suitable location in the vehicle for the timer or On/Off switch.
2. Connect the harness to the timer, or switch.
NOTE
The Webasto heating
system will not perform to
your satisfaction with weak
batteries.
CAUTION
If welding is done on the
vehicle, the main battery
cables must be
disconnected from the
battery to protect the
electronic control unit.
Thermo 230/300 4 Installation
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