Wiring The Inverter To The Battery Bank - Magnum CSW1012 Owner's Manual

2.0 Installation
2.4.7

Wiring the Inverter to the Battery Bank

CAUTION: The inverter is NOT reverse polarity protected—if this
happens the inverter will be damaged and will not be covered
under warranty.
to the inverter, verify the correct battery voltage and polarity using
a voltmeter. If the positive terminal of the battery is connected
to the negative terminal of the inverter and vice versa, severe
damage will result. If necessary, color code the cables (with
colored tape): red for positive (+), and white for negative (-) to
avoid polarity confusion.
Info: The DC overcurrent device (i.e., circuit breaker or fuse) must
be placed in the positive (red) DC cable line between the inverter's
positive DC terminal and the battery's positive terminal (red)—as
close to the battery as possible. For maximum protection, install it
within 18 inches (45 cm) of the battery.
Follow the steps below to wire the inverter to the battery bank:
1. Route an appropriately sized DC negative wire (marked white) from the
negative terminal of the battery bank to the inverter's negative terminal
(Item 9, Figure 1-2).
2. Mount the fuse/disconnect assembly (or circuit breaker) as near as
practical to the batteries and leave open (i.e., no power to inverter).
WARNING: DO NOT close the DC circuit breaker or connect the
fuse to connect battery power to the inverter at this time. This will
occur after the installation is complete.
CAUTION: If connecting live battery cables to the inverter DC
terminals, a brief spark or arc may occur; this is normal and due
to the inverter's internal capacitors being charged.
3. Route and connect an appropriately sized DC positive wire (marked red)
from the inverter's positive DC terminal (Item 10, Figure 1-2) to one
end of the fuse/disconnect assembly (or circuit breaker).
4. Connect a short wire (same rating as the DC wires) to the other side of
the DC circuit breaker (or one end of the fuse/disconnect assembly) and
the other end of the short wire to the positive terminal of the battery
bank (see Figure 2-1 for reference). This is essential to ensure even
discharging across the entire battery bank.
5. Ensure the DC wire connections (on the batteries, inverter, and DC circuit
breaker/fuse lugs) are fl ush on the surface of the DC terminals, and
the hardware (washer(s) and nut) used to hold these connections are
stacked correctly (see Figures 2-4 and 2-5). Verify all DC connections on
the inverter are torqued from 79 to 96 lbf-in (8.9 to 10.9 N-m).
6. Once the DC connections are completely wired and tested, coat the
terminals with an approved anti-oxidizing spray.
7. If the batteries are in an enclosure, perform a fi nal check of the
connections to the battery terminals, then close and secure the battery
enclosure.
8. Route an appropriately sized DC grounding wire (see Table 2-1 for
ground wire size) from the inverter's DC chassis ground screw (Item 12,
Figure 1-2) to a dedicated system ground. It is recommended that you
connect the cable to the chassis ground screw with a copper, tin-plated
12
Before connecting the DC wires from the batteries
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