Magnum CSW1012 Owner's manual - page 21
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© 2015 Sensata Technologies
2.0 Installation
2.4.7 Wiring the Inverter to the Battery Bank
CAUTION: The inverter is NOT reverse polarity protected—if
the
positive terminal of the battery is connected to the negative terminal
of the inverter and vice versa, severe damage to the
inverter will
occur and this will void the warranty.
Before connecting the DC wires
from the batteries to the inverter, verify the correct battery voltage
and polarity using a voltmeter. 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 10, Figures 1-2 and 1-3; Item 9, Figure 1-5).
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 11, Figures 1-2 and 1-3;
Item 13, Figure 1-5) 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 that short wire to the positive terminal of the battery
bank (see Figure 2-1 or Figure 2-2 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) are fl ush on the surface of the DC terminals, and
all hardware used to hold these connections are stacked correctly (see
Figures 2-7 and 2-8). Verify all DC connections on the inverter are torqued
correctly (see Table 2-1), and the total cable distance from the inverter to
the battery is within the requirement of Section 2.4.1 (DC Wire Sizing).
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 ground wire (see Table 2-2) from the
inverter’s DC chassis ground connection to a dedicated system ground.
9. Once the entire installation is complete and all connections verifi ed, close
the fuse disconnect (or circuit breaker) to provide power to the inverter.