Trace Engineering C40 Manual page 9

Do not locate the C40 in a sealed compartment with the batteries. Batteries can generate
hydrogen sulfide gas which is very corrosive to electronic equipment and everything else.
They also generate hydrogen and oxygen. If accumulated, this mixture could be ignited by
an arc caused by the connection of battery cables, a loose terminal, etc. Installation within
a ventilated enclosure with sealed batteries only is acceptable.
Wiring
Be sure to set the voltage selector jumper to the appropriate setting before energizing the
User Configuration Options
system (see
damage to the system as the charging regulation will not occur. Torque the terminals to
25 inch-pounds once the wires have been installed. Replace the cover after wiring.
NOTE: Regardless of configuration, only the positive conductor from a PV array or
a DC load may be connected to the terminal marked "PV POS/LOAD."
The minimum recommended wire gauge is 8 AWG (13.3 mm2) with a 75° C insulation
rating. The terminals on the C40 will accept up to #2 AWG (33.6mm2) copper or aluminum
wire. No crimp-on terminals or lugs are required. The following table gives the maximum
permissible length allowed for each wire size at 40 amps with 3% voltage drop. Find your
Warning: Due to a printing error (what were we thinking?), the input Warning: Due to a printing error (what were we thinking?), the input
terminal on the C40 Rev. #2230D printed circuit board is incorrectly terminal on the C40 Rev. #2230D printed circuit board is incorrectly
labeled 'PV+/WIND+/LOAD+.' Never connect a wind generator to this labeled 'PV+/WIND+/LOAD+.' Never connect a wind generator to this
terminal. Rev.#2230D is not designed to accept the very large current terminal. Rev.#2230D is not designed to accept the very large current
fluctuations typical of wind generators. Damage to the C40 will result. fluctuations typical of wind generators. Damage to the C40 will result.
PV+/WIND+/LOAD+
©
Copyright Trace Engineering Co. Inc.
th
5916 195 Street, NE
Arlington, WA 98223 USA
for instructions). Incorrect settings may result in
Tel (360) 435-8826
Fax (360) 435-2229
www.traceengineering.com
Part Number 2680 Rev. C
November 4, 1998 9
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