Wiring Diagram; Power Supply 12 V; Battery Connection; Room Temperature Sensor Connection - Truma VarioHeat eco AU Installation Instructions Manual

Wiring diagram

A
A
Fig. 23 – Wiring diagram
Fig. 24 – Cable harness
Plug / contact Description
X7-1 Room temperature sensor
X7-2 Room temperature sensor
X7-3 Window switch or wire bridge
X7-4 Window switch or wire bridge
X7-5 —
X7-6 —
X5-1 + Battery
X5-2 - Battery
X6 TIN Bus / Truma CP plus VarioHeat
2
X5
1
1 5
X6
2 6
3 7
X7
4 8

Power supply 12 V

Electric cables, switching and control devices for heaters
must be arranged in the vehicle so that they function per-
fectly under normal operating conditions. All cables that lead
outside must be laid so that they are protected against spray
water at the hole.
Before starting work on electrical parts, you must disconnect
the heater from the power supply. It is not sufficient to switch
it off on the control panel!
To ensure an optimum power supply, the heater must be con-
nected to the fused on-board power supply (central electricity
system 10 A) with 2 x 2.5 mm² cables (for lengths in excess
of 6 m, with 2 x 4 mm² cables). Potential drops in the supply
line may have to be considered. Connect the negative cable to
the central earthing system.
If parts are connected directly to the battery, the positive and
negative cables must be fused.
No other equipment may be connected to the supply cable.
• In case of voltage reversal, fuse F1 is triggered.
– If connected to a battery.
– If connected to a power supply unit with at least
25 A.
• If grid or power supply equipment is used, they must
supply a controlled output voltage between 11 V
and 15 V (AC voltage ripple < 1.2 Vpp).

Battery connection

• Crimp 6.3 x 0.8 mm flat connectors* on to the positive and
negative cables.
* The supplied flat connectors are suitable for cable cross-
sections from 0.8 to 2.5 mm
for other cable sizes.
• Insert the positive and negative cables in the plug X5 (con-
tact 1 / 2).

Room temperature sensor connection

• Connect bushing X7 of the room temperature sensor to the
X7 plug of the cable harness.

Digital control panel connection

• Connect the X6 connector.

Window switch connection (optional)

• Separate the wire bridge (contact 3 / 4) in the X7 bushing.
• Cut off the two plug contacts from the cable of the win-
dow switch and connect with contact 3 / 4. Polarity is
unimportant.
2 . Use suitable flat connectors
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