Owners Manual

© 2015 Sensata Technologies 11
Installation
2.3 Wiring the Inverter – General Requirements
This section describes the requirements and recommendations for wiring a
CMW Series inverter. Before wiring the inverter, carefully read all instructions.
WARNING: Wiring should meet all local codes/standards and be
performed by qualifi ed personnel (i.e., licensed electrician).
2.3.1 Wiring Requirements
• All conductors that are at risk for physical damage must be protected by
tape or placed in a raceway.
• Always check for existing electrical, plumbing, or other areas of potential
damage prior to making cuts in structural surfaces or walls.
• Where DC wiring must cross AC or vice-versa, try to make the wires at
the crossing point perpendicular (90 degrees) to one another.
• DC overcurrent protection must be provided as part of the installation.
• Use only copper wires with a minimum temperature rating of 75°C
(194°F).
2.3.2 Torque Requirements
All wiring to the DC terminals and DC ground connection should be checked
periodically (once a month) for proper tightness. For the torque requirements,
refer to Table 2-1. If you don’t have a torque wrench, ensure all connections
are tight.
Table 2-1, DC Terminal – Torque Requirements
Inverter
Model
DC
Terminals
Torque
Requirements
Torque Wrench
Size Needed
CMW412
Hex Cap
screws
52 to 58 lbf-in
(5.9 to 6.5 N-m)
NA
CMW1012
M6 x 1.0
Hex nuts
79 to 96 lbf-in
(8.9 to 10.9 N-m)
10 mm wrench
CMW1512
M8 x 1.25
Hex nuts
16 to 21 lbf-ft
(22 to 28 N-m)
13 mm wrench
2.4 DC Wiring
This section describes the inverter’s required DC wire sizes, the recommended
disconnect/overcurrent protection, and how to make the DC connections to
the inverter and the battery bank.
WARNING: Even though DC voltage can be regarded as “low
voltage”, signifi cant hazards may be present, particularly from short
circuits of the battery system.
CAUTION: The inverter is NOT reverse polarity protected—which
means if the negative and positive battery voltage is connected to
the inverter backwards, the inverter will likely be damaged. Use
a voltmeter to verify the correct polarity BEFORE connecting the
DC wires.
CAUTION: DO NOT connect the battery cables to the inverter until
all wiring is complete, and the correct DC voltage and polarity have
been verifi ed.