Accessories For Control Panel And Power Selector Switch; Electrical Connections; Connection 12 V; Connecting Room Temperature Sensor To The Unit - Truma Combi 4 Einbauanweisung

Accessories for control panel and power
selector switch
– Control panel cable, 6 m (part no. 34020-21400)
– Coupling (part no. 34020-21500)
– Extension cable, 3 m, including coupling (part no. 34301-02)
– Extension cable, 6 m, including coupling (part no. 34301-01)
Truma offers side parts (37) in eight different colors for finish-
ing the cover frames (38) in a visually pleasing way. Please ask
your dealer.

Electrical connections

Route connecting cables in such a way that they cannot
chafe. Please also use leadthrough bushings or edge protec-
tion profiles where there are sharp edges such as metal panel
leadthroughs. The connecting cables must not be attached to
or come into contact with metal surfaces, the exhaust duct or
warm air ducts.
The electrical connections are located under the connec-
tion cover (39). The cover can be removed by pressing and
simultaneously sliding it in the direction of the arrow. When
removing or installing the connection cover on the connec-
tion cables, make sure that the cables are not pulled out or
become pinched.
39
40
12 V
40 = Input voltage +12 V (spade connector 6.3 mm)
41 = Input voltage - 12 V (spade connector 6.3 mm)
42 = FrostControl heating element (accessory)
43 = Device fuse: 10 A – slow – (T 10 A)
44 = Wire bridge (or window switch – accessory)
45 = Time switch ZUCB (accessory)
46 = Room temperature sensor
47 = Control panel / Diagnostic connector*
48 = Control panel / Diagnostic connector*
* Alternative connections – for one control panel
(Combi 4 / Combi 6) or one power selector switch
(Combi 4 E / Combi 6 E) and one diagnostic connector.
All connections to the unit should be made with sagging
connection cables. This will prevent condensation water from
running down the connection cables and into the unit.
open
42 48
44 46
41
43 45 47
The connecting cables and plugs must not be subjected to
force. Bundle connecting cables (see figure) and secure each
one to housing using a cable binder in order to provide strain
relief.
All cables must be securely attached and must not become
loose or disconnected due to vibration – risk of fire!

Connection 12 V

Electric cables, switching units and control units for heaters
must be arranged in the vehicle in such a way that their satis-
factory operation cannot be adversely affected under normal
operating conditions. All cables leading to the outside must be
splash proof at the leadthrough opening.
Prior to working on electric components the appliance must
be disconnected from the power supply. Swit ching off at the
control panel is not sufficient!
When carrying out electric welding work on the body the
appliance connection must be disconnected from the vehicle
electrical system.
The unit is equipped with reverse polarity protection. If
the unit is connected with incorrect polarity, there will be
no display on the LED. The unit can be used after establishing
proper polarity.
To guarantee optimum power supply, the heating system
must be connected to the fused on-board network (central
electronics unit 10 A) with a 2 x 2.5 mm² cable (for lengths
over 6 m with 2 x 4 mm² cable). If relevant, voltage drops in
the supply cable must be taken into account. Connect the
negative lead to the central earth. If connected directly to the
battery, the positive and negative leads must be fused. For the
connections (40, 41), we recommend 6.3 mm fully insulated
flat connectors.
Do not connect any other consumers to the supply line!
When power packs or power supply units are being
used, note that the output voltage is between 11 V and
15 V and the alternating current ripple is < 1.2 Vpp. We rec-
ommend the automatic chargers from Truma for the different
applications. Please ask your dealer. Other chargers may be
used only with a 12 V battery as a buffer.

Connecting room temperature sensor to the unit

Plug the connection cable's plug onto connection (46)
(no need to observe polarity).

Connecting control panel to the unit

Insert the plug (35) of the connection cable (34) into one of
the connections (47 or 48). Make sure that the plug engages.
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