Electrical Connections - Truma Combi 4 Installation Instructions Manual

Installing the power selector switch and
the control panel
(Combi 4 E / Combi 6 E)
Select a clearly visible location for the control panel (33)
and the power selector switch (33a). The scope of delivery
includes a 3 m connecting cable (34) and a control panel
connecting cable (34a).
In each case, drill a hole with diameter 55 mm (distance
between centres of holes 66 mm). Connect control panel (33)
and power selector switch (33a) with control panel connecting
cable (34a). Attach connector (35) of connecting cable (34) to
power selector switch (33a). Please ensure that all connectors
engage properly. Clamp cables (34 + 34a) into control panel
cable guides. Slide connecting cable through towards the rear
and route to the heater.
5 5
34a
Ø
34
35
35
33a
Attach power selector switch and control panel with
4 screws (36) in each case and fit the cover frame (37).
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 protection
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.
m
m
33
36
36
37
38 37
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.
38
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.
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.
open
39
40 42
44 46
12 V
41
43 45
48
47
15