Truma BGA 14, Operating And Installation Instructions

Page: 11 / 16

11
Electrical connection 12 V
Disconnect device from power supply before starting to work
on electrical components. Switching off at the control panel is
insufficient!
The device must be disconnected from the on-board power
supply when electric welding work is being carried out on the
vehicle body.
Reversing the polarity of the connections will result in
a risk of cable fire. Any warranty or liability claims will
also be invalidated.
Push the control panel cable connector (28a) onto the control
board.
In order to attach the cable (28) securely, route it through the
cable guide (28b).
The 12 V electrical connection is made at the clamp (35).
orange = positive 12 V
blue = negative
This is done by pressing from above with a small screwdriver
and pushing the cable in from the front.
Connect to the fuse-protected on-board power supply (central
electrical system 5 – 10 A) using a 2 x 1.5 mm ² cable.
Connect negative line to main ground connection. For lengths
of over 6 m, use a 2 x 2.5 mm ² cable. If the equipment is con-
nected directly to the battery, the positive and negative lines
must be protected. Screw the cover (34) back on.
If necessary, remove the outer cable sheathing at the cover
leadthrough.
No other 12 V consumers must be connected to the supply
line.
The boiler fuse (36), 1.6 A, (slow-acting) is on the control
board
(see Fig. 6)
.
Fasten the electronics cover with screws (34).
28a
28b
28
35
34
36
Fig. 20
When power packs or power supply units are being
used, note that the regulated output voltage is between
11 V and 15 V and the alternating current ripple is < 1.2 Vpp.
Installation of the control panel
When using control panels which are specific to the
vehicle or the manufacturer, the electrical connection
must be established in accordance with the Truma interface
descriptions (refer to Electrical connection 230 V ~ / 240 V ~).
Any modification made to the Truma components pertaining
to this will void the warranty and exclude any liability claims.
The installer (manufacturer) is responsible for providing usage
instructions for the user as well as for identification printing
on the control panels.
When selecting the location, bear in mind that the control
panels must not be subjected to direct radiant heat. Length
of connection cable 3 m. If required, a cable extension of 5 m
can be supplied (refer to page 12).
Ø 55 mm
29
28
28
32
26
31
25
Fig. 19
Drill a hole with diameter 55 mm.
Plug the control panel cable (28) to the control panel for gas
operation (26) and then fit on the rear cover cap (29) as a
stress-relieving device.
Push the cable through to the rear and lay the connection
cable (28) to the Truma UltraRapid HWS.
Lay the connection cable with the orange multipole connec-
tor (28) to the 12 V control electronics unit (for connection
refer to Electrical connection 12 V).
Secure control panel with 4 screws (31) and fit the cover
frame (32) on it.
If a flush installation of the control panel is not possible,
use the surface-mounting frame (25) as supplied.