VANNER
Incorporated
Owner’s Manual
300 Watt VLT Series Inverter Owner’s Manual - 9 -
4 Installation
4.1.1 Inverter Installation Considerations
Mounting: Locate a flat secure, dry, horizontal or vertical surface large enough to mount the inverter. The
location should be as close to the battery as practical, usually within six feet, but not in the same
compartment and should provide adequate ventilation while the inverter is operating. The location must
be clean, dry and free from road spray, dripping water or other moisture contamination.
Cooling Fan Clearance: The mounting location must allow unobstructed airflow for cooling. Allow a
minimum clearance of 3 inches on the front and back of the inverter. The Cooling Fan is thermostatically
controlled. Obstruction of the fan exhaust or the front intake vents will diminish the inverter output
capacity due to overheating.
4.1.2 DC Wiring Considerations
Do not connect the 12V model to a 24V battery. The unit will be destroyed immediately. Operation
of the inverter without a proper ground connection may result an electrical safety hazard. Damage caused
by reversed polarity will void warranty.
A DC FUSE IS REQUIRED
to protect the DC cables in case of a short circuit. The wiring of the
inverter installation should conform to the National Electric Code (NEC) and any other state or local codes
in effect at the time of installation. Article 551 of the NEC requires any DC cable from a battery, which
measures longer than 18 inches along its length, be protected by a fuse.
BE AWARE
, as a large number of capacitors become charged upon completion of the DC circuit,
THERE WILL BE A LARGE SPARK
when the last battery connection is made. The spark is normal and
will occur every time the batteries are connected. It is advisable to make the last DC connection at the
inverter, not at the battery, to reduce the risk of battery explosion.
To minimize electromagnetic radiation that could interfere with sensitive electronics, route the AC output
wiring and DC power wiring with as much physical separation as possible from low voltage wiring such as
audio and video signal wires. Route the DC positive and negative cables as close together as possible
and use cable ties to keep them together.
If passing through steel or other ferrous metal walls, the DC input cables need to pass through the same
hole to prevent causing a transformer effect. If two holes are required, cut a slot to connect the two holes
to prevent heating of the ferrous metal.
P
roper DC cable size is critical
for the performance and safe operation of the inverter system.
The DC Cable and Fuse Sizing Chart
shows the minimum cable sizes recommended. These sizes allow
a ½ volt maximum voltage drop at maximum inverter capacity and will insure optimum inverter
performance. DC cable to be used with these fuse sizes should be
minimum
insulation temperature
rating of 105°C and voltage rating of 600V.
DC cables should be as short as possible.
Do not use the vehicle chassis as the DC negative conductor. The negative cable should be the same
size as the DC positive cable and should be connected directly to the battery negative terminal.
