156 90000-508
G3
Installation Guide
5
1.
Once you have found a suitable mount-
ing position for G3
, hold the unit and
the unattached mounting bracket in the
proposed mounting position and check
that there is clearance behind the unit for
the heatsink, cables, etc. Check that the
position provides a large enough flat
surface that the bracket will not be dis-
torted when installed.
Figure 1 - Mounting plate and slot dimensions
2.
Using the installation bracket as a tem-
plate, mark the four locations for drilling
(see Figure 1). Again, ensure that drill-
ing at the selected points is safe and will
not cause damage.
3.
Indent the drilling positions with a cen-
ter punch.
4.
Drill holes sized for the self-tapping
screws or for the nuts, bolts and lock
washers used.
Caution:
Slightly reduce the size of the
drilled holes when using self-tapping
screws in thin metal.
Figure 2 - Bracket installation
5.
Install the bracket without distorting.
6.
Securely mount G3
to the installed
bracket using the four supplied 8x40
black machine screws.
7.
Drill any additional holes as required for
routing all cables and fit holes with
suitable grommets or bushings
whenever required.
2.4
Electrical installation
2.4.1 Electrical requirements
G3
is designed to operate from a 13.8Vdc
nominal car battery (negative ground) and
requires currents up to 15.0A. It will tolerate
a supply voltage range of 10.9 volts to 16.3
volts.
In vehicles with a 24 VDC electrical system
(mostly in trucks), it is essential to provide a
suitably rated 24/12 VDC converter to iso-
late the unit from the battery and protect it
against excessive voltage.
Warnings:
Always disconnect G3
’s DC
power lead before connecting a
second battery, using power from
another vehicle or power boosting
(e.g. when “jump starting” the
vehicle).
2.4.2 Routing of power cable
1.
Start by disconnecting the vehicle’s bat-
tery unless specifically prohibited from
doing so by the customer, vehicle manu-
facturer, agent or supplier.
Note:
In this event, exercise ex-
treme caution throughout
the installation and fit the
fuse only when the installa-
tion is complete.
2.
The 22 feet (6.7 meters) long power ca-
ble consists of three wires attached to a
Packard Electric “Weather-Pack” con-
nector (DC power Connector).
2.5"
6.0"
1.0"
0.2"