Installing The Control Panels; Electrical Connections; 12 V Voltage Supply - Truma Combi D4 CP plus ready Einbauanweisung

Installing the control panels

The installation of the control panels is described in the instal-
lation instructions provided with the control panel.

Electrical connections

Route connecting cables in such a way that they cannot chafe.
Please also use leadthrough bushings or edge protection pro-
files at sharp edges such as metal panel leadthroughs. The
connecting cables must not be attached to or come into con-
tact 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
connecting cables are not pulled out or become pinched.
60
61 63 64
62
70 71
Fig. 29
61 = Input voltage +12 V (spade connector 6.3 mm)
62 = Input voltage -12 V (spade connector 6.3 mm)
63 = FrostControl heating element (accessory)
64 = Device fuse: 10 A (slow-acting) (T 10 A)
65 = Wire bridge (or window switch – accessory)
66 = Time switch ZUCB (accessory – only in combination
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-
necting cables. This will prevent condensation water from run-
ning down the connecting cables and into the unit.
Fig. 30
65 67 68 69
66 73 72
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!
Fig. 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 unit from power supply before starting 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 is equipped with reverse polarity protection. The
LED indicator will not work if the unit is connected with
incorrect polarity. 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 Truma automatic chargers for the various appli-
cation cases. 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