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Installation
3. Install a DC-rated fuse on the positive battery terminal.
Alternatively, install a DC-rated circuit breaker that connects to
the positive battery terminal.
The fuse (or circuit breaker must have an Ampere Interrupting
Capacity (AIC) that exceeds the short-circuit current available
from the battery. For guidance, see “Cold Cranking Amps /
AIC” on page 11.
4. When configuring for heavy loads (see Figure 5), install a
battery selector switch and connect it to the DC-rated fuse (or
circuit breaker).
5. On the inverter side, attach the connectors of the positive and
negative cables into the cabling terminals of the inverter.
Note: Make a secure connection. Loose connectors cause
excessive voltage drop and may cause overheated wires and
melted insulation.
Note: The red terminal is positive (+) and the black terminal is
negative (–). Power connections to the PROwatt SW Inverter
must be positive to positive and negative to negative.
6. Attach the connector on the positive cable to the DC-rated fuse
(or circuit breaker) which is connected to the positive terminal
of the battery.
When configuring for heavy loads (see Figure 5), attach the
connector on the positive cable to the battery selector switch
that is already connected to the DC-rated fuse (or circuit
breaker).
Note: Make a secure connection. Loose connectors cause
excessive voltage drop and may cause overheated wires and
melted insulation.
WARNING: Risk of electrical shock or fire.
The PROwatt SW Inverter does not come with a DC-rated
fuse (or circuit breaker) to safely withstand the short-
circuit current batteries can produce. To avoid the risk of
electrical shock or fire, install a DC-rated fuse (and fuse
holder) on the positive battery terminal.
CAUTION: Risk of inverter damage due to
reverse polarity.
A reverse polarity connection (positive to negative) will
blow a fuse in the inverter and may permanently damage
the unit. Damage caused by a reverse polarity connection
is not covered by your warranty.
WARNING: Risk of explosion or fire.
Do not complete the next step if flammable fumes are
present. Explosion or fire may result. Thoroughly ventilate
the battery compartment before making this connection.
PROWatt SW Inverter NA.book Page 13 Wednesday, August 5, 2009 2:24 PM
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