Electrics; Installation Procedure For The Harness - Webasto thermotop C Installation Instructions Manual

ELECTRICS

Please check the rating plate voltage on the heater
and ensure it is the same as your vessels DC
power supply.
Each heater is supplied with a pre wired harness to
suit the Thermotop C / E heater's specific
requirements. It is, therefore not recommended that
modifications to the wiring harness are carried out
without prior consultation with Webasto's Technical
department.
It is essential that all electrical connections are
installed correctly. Loose or dirty connections will
cause a high resistance in the wiring. This in turn
may cause under-voltage at the heater.
The Thermotop C / E electrical system comprises of
one main wiring harness but has five distinct
sections which are labelled accordingly.

Installation Procedure for the Harness

When the heater, fuel pump and timer have all been
mounted start off by clipping the two fuse carriers
together and then attach these to a secure position
with the small bracket / clip provided.
Then with the batteries isolated proceed to connect
the harness to the individual components in the
following order.
1 Plug the two multi core plugs into the top of
the heater, labelled 'Heater'.
2 Plug the cable labelled Fuel Pump into the
fuel pump.
Webasto Part Number : 4110310A
Issue No: 02 : 10th November 2010
Matthew Millard
Visit www.butlertechnik.com for more technical information and downloads.
In the interests of continued development, we reserve the right to change
specifications without prior notice
www.butlertechnik.com
3 If your heater kit is supplied with the square
black Webasto timer proceed as follows.
Plug the small square plug labelled Timer /
Programmer into the timer. Note, the 2 wires
(Brown & Purple) adjacent to this plug are not
normally used and need insulating and tying
back.
* If your heater is supplied with a rotary On/Off
switch you will have a small adapter wiring
harness that goes in between the switch and
the small plug on the main harness.
4 The wire marked +VE Supply or RED is
connected to the battery isolator switched side.
5 The wire marked -VE Supply or BROWN is
connected to the battery negative terminal or the
Load side of the Shunt if one is fitted.
The electrical side of the installation is now complete.
The small yellow wire marked 'Diagnostic' is for
Webasto Service only and must not be connected to
the vessel, (Webasto USB Diagnostics Tool).
Refer to the schematic diagram for the fuse sizes.
Marine Comfort
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