Electrical Connections - Webasto Air Top 3500 Installation Instructions Manual

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Air Top 3500/5000

Electrical Connections

All pipes that are not required must be insulated!
NOTE:
When using the combination or standard digital timer a
remote-control pushbutton may be provided near the bunk
for added convenience. The connection is to be performed
in accordance with wiring diagram 30 and 31.
The electrical connection is to be performed in accordance
with the system circuit (Fig. 29, 30, 31, 32, 33).
Connection in Vehicles for the Transportation of Dan-
gerous Goods (TRS)
When installing the Air Top 3500/5000 D heaters in ve-
hicles for the transport of hazardous materials, the require-
ments laid down in TRS 002 and TRS 003 (Technical Gui-
delines relating to the ordinance of transporting hazardous
materials on the road) must be fulfilled in addition to those
of the StVZO. The electrical connection is to be performed
in accordance with wiring diagrams Fig. 32 or 33.
On vehicles without auxiliary drives, electrical connection
is to be performed in accordance with the system circuit di-
agram Fig. 33.
NOTE:
Switch S3 must be so installed that in the event of a pump-
ing device being put into operation, a plus potential is ap-
plied across the corresponding input of the electronic con-
trol unit.
CAUTION:
If no voltage to ground is present at the control unit input
X6/1 upon start-up all TRS functions will be inoperative.
After the plus potential has been applied across the control
unit input X6/1 (auxiliary drive ON) a short after-run period
of 20 seconds takes place and subsequently the control
unit is in its "fault lock-out" state.
12
CAUTION:
In accordance with the Technical Guidelines relating to the
ordinance of transporting hazardous materials on the road,
heaters may only be switched on by means of a special
switch installed in the driver's cabin and are to be actuated
manually. If the heater is equipped with a combination or
standard digital timer, it must ensured that pin 4 on the
combination or standard digital timer remains unassigned.
The heater can therefore only be started up by means of
the instant heating button.
No other digital timers are allowed to be used in TRS ve-
hicles.
Connection of the Heater
To connect the cable harness, remove the control unit
cover on the heater and connect the cable harness con-
nectors with the control unit.
Fig. 22: Removal of Control Unit Cover
NOTE:
Lift off control unit cover applying a blunt edge at its side
(see arrows in Fig. 22)
Be sure not to touch the printed conductors of the
control unit.
Prior to starting up the heater for the first time, reinstall the
control unit cover to prevent any undue escaping of heat-
ing air (overheating of heater).
Cable lead-through can optionally be located on the left or
right.
To ensure that the cable lead-through in the control unit
cover provides a tight seal, the cable grommet on the
cable harness must be displaced accordingly.
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Connection to Supply Voltage
Preferably to be supplied from the vehicle central electrical
system.
To provide the heater with adequate protection, an ad-
ditional flat fuse holder is to be installed (supplied
with the heater). The fuse holder may only be installed
in the vehicle interior.
Fig. 23: Removal of Mounting Plate of Fuse Holder
F = 15A (24V)
F = 20A (12V)
Fig. 24: Fuse Holder, Installation Position