Magnum Energy MMS-E Series User Manual

Page 24

2.0 Installation

CAUTION: The inverter is NOT reverse polarity protected.
If this happens, the inverter will be damaged and will not
be covered under warranty. Before connecting the DC
wires from the batteries to the inverter verify the correct
battery voltage and polarity using a voltmeter. If the posi-
tive 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 or heat shrink tubing; BROWN for positive (+), and
BLUE for negative (-) to avoid polarity confusion.

Info: The DC overcurrent device (i.e., fuse or circuit
breaker) must be placed in the positive (BROWN) DC
cable line between the inverter’s positive DC terminal
and the battery’s positive terminal (BROWN); as close
to the battery as possible.

2.7.1 DC Ground Wire

Route an appropriately sized DC grounding wire (GREEN w/ YELLOW
stripe) from the inverter’s DC Ground Terminal (see Figure 1-2, Item
11) to a dedicated system ground. Recommended tightening torque
is 5.2 N-m.

2.7.2 DC Negative Wire

Route an appropriately sized DC negative wire (BLUE) from the
negative terminal of the ﬁ rst battery string to the inverter’s negative
terminal (see C3-4 for reference).

2.7.3 Battery Temperature Sensor

Connect the RJ11 connector end of the BTS to the ACCESSORY PORT
(see Figure 1-3, Item 14) on the inverter. Connect the other end of the
BTS to the negative terminal of the ﬁ rst battery string (in same place as
the negative DC wire above); refer to Figure 2-4 for the correct hardware
placement.

2.7.4 DC Positive Wire

Mount the DC fuse block and disconnect (or circuit breaker assembly)
as near as practical to the batteries, and then open the disconnect
(or circuit breaker).

WARNING: DO NOT close the DC fuse/DC disconnect (or
close the DC circuit breaker) to enable battery power to
the inverter at this time. This will occur in the Functional
Test after the installation is complete.

Route and connect an appropriately sized DC positive wire (BROWN)
from the DC fuse block (or circuit breaker assembly) to the inverter’s
positive DC terminal.