Fitting The Control Panels; Electrical Connections; 12 V Voltage Supply - Truma Combi D 6 Installation Instructions Manual

Fitting the control panels

Installation of the control panels is described in the installation
instructions provided with the control panel.

Electrical connections

Route connector 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 connector 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 beneath the heater con-
nection cover (60). The cover can be removed by pressing and
simultaneously sliding it in the direction of the arrow. When
removing or installing the connection cover, ensure that the
connector cables are not pulled out or become pinched.
60
61
62 63 64 65
70 71
Figure 29
61 = Input voltage +12 V (spade connector 6.3 mm)
62 = Input voltage, earth (spade connector 6.3 mm)
63 = FrostControl heating element (accessory)
64 = Appliance fuse: 10 A (slow-acting) (T 10 A)
65 = Wire bridge (or window switch – accessory)
66 = Time switch ZUCB (accessory – only in conjunction
with analogue control panels)
67 = Room temperature sensor
68 = Control panel / diagnostic connector*
69 = Control panel / diagnostic connector*
70 = Metering pump
71 = Burner fuse 20 A (slow-acting) 6.3 x 32 mm
72 = Extractor fan
73 = Burner diagnostic connector
* Alternative connections
All connections to the unit should be made with sagging con-
nector cables. This will prevent condensation water from run-
ning down the connector cables and into the unit.
Figure 30
67 68 69
66 73 72
The connector cables and plugs must not be subjected to
force. Bundle connector 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!
Figure 31

12 V voltage supply

Electrical lines, switching and control equipment for heaters
must be in locations that will not cause the operation thereof
to be adversely affected under normal operating conditions.
The breakthroughs of all lines leading to the outside must be
protected from splash water.
Disconnect the appliance from the power supply before start-
ing to work on electrical components. Switching off at the
control panel is insufficient!
The equipment must be disconnected from the on-board
power supply when electric welding work is being carried out
on the body.
The unit has reverse polarity protection. The LED indicator
will not work if the unit is connected with incorrect polar-
ity. The unit can be re-used after restoring the correct polarity
and replacing the fuse (64).
In order to ensure that an optimum power supply is provided,
the heater must be connected to the fuse-protected on-board
power supply (fuse in central electrical system 20 A). Voltage
drops in the supply line must be taken into consideration if
necessary.
Cable length
– 5.0 m
5.0 m – 7.5 m
Connect negative line to main ground connection. If the
equipment is connected directly to the battery, the posi-
tive and negative lines must be protected. For the connec-
tions (61, 62), we recommend 6.3 mm fully insulated flat
connectors.
No other consumers must be connected 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 various
applications. Please contact your dealer. Only use chargers
with a 12 V battery as a buffer.
Cross-section
2 x 4.0 mm²
2 x 6.0 mm²
21