INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31
PAGE 6 OF 15
7.0
ENVIRONMENTAL RATINGS
7.1
OPERATING AMBIENT TEMPERATURE RANGE
0-50 degrees C (32-122 degrees F)
7.2
STORAGE TEMPERATURE RANGE
-40 degrees C to +60 degrees C (-40 degrees F to +140 degrees F)
7.3
HUMIDITY
This unit is capable of operating in an ambient relative humidity range of 0-95% (non-condensing).
7.4
SHOCK
The unit in its shipping container, withstands shock developed when one edge of the container is
dropped six (6) inches while the opposite edge is resting on the ground, or if it is dropped two (2)
inches on any surface no physical damage or degradation of the electrical performance will occur.
7.5
VIBRATION
The unit in its shipping container withstands vibration encountered in shipping without physical damage
or degradation of the electrical performance.
7.6
ALTITUDE
This unit is capable of operation at altitudes to 3300 feet at an ambient temperature of +50 degrees C
(122 degrees F) and 10,000 feet at ambient of +40 degrees C.
7.7
HEAT DISSIPATION (BTU)
REFER TO A31 SPECIFICATION SHEET
7.8
VENTILATION REQUIREMENTS
The unit should be mounted so that ventilating openings are not blocked and air entering the cabinet
does not exceed +50 degrees C (122 degrees F). There should be at least 6“ of free space around the
enclosure. When two or more units, in 9E cases, are stacked, a heat baffle must be used between units.
7.9
AUDIBLE NOISE
Audible noise is not greater than 65 DBA measured at 5 feet from any surface on the unit enclosure.
8.0
INSTALLATION AND OPERATION INFORMATION
8.1
MINIMUM WIRE SIZES
The AC output and the DC input minimum wire size requirements are different in each state. All National
and Local wiring codes should be followed. At distances exceeding 10 feet, the DC wire size should be
chosen to keep the voltage difference between the units DC input terminals and the battery at less than
1/2 volt when the unit is fully loaded. For loop lengths greater than 20 feet, larger wire should be used
to control these voltage drops. The total loop length is twice the distance from the wiring point to the
unit.
8.2
WIRE SIZES
These wire sizes are based on those recommended in the National Electric Code Table 310-16 for copper
wire at 90 degrees C conductor temperature operating in an ambient of 30 degrees C. (For higher
operating temperatures refer to the derating factors in the National Electric Code Table 310-16.)
