Chapter 3 – Installation Instructions
3-2 ACS 501 Installation & Start-up Manual
Environment
These drives are to be used in a heated, indoor controlled environment that is
relatively free of moisture and conductive contaminates such as condensation,
carbon dust, and the like.
The maximum ambient temperature allowed is 113°F (45°C) for an ACS 501
in a NEMA 1 enclosure for constant torque loads, when the load current is
lower than or equal to the continuous rated constant torque current (I
R
). The
maximum ambient temperature allowed is 104°F (40°C) for an ACS 501 in a
NEMA 12 enclosure for constant torque loads; and an ACS 501 in a NEMA 1
enclosure for variable torque loads, when the load current is lower than or
equal to the continuous maximum load current (I
RSQ
).
The cooling air must be clean and free from corrosive materials. When
necessary the required cooling should be provided by using clean, dry air.
Table 3-2 Required Cooling Air Volume for ACS 501 Units
If the cooling air contains dust, clean the cooling surfaces of the unit regularly
using compressed air and a brush. If the ACS 501 is in a NEMA 1 enclosure,
cover the vents to prevent the dust from entering the unit.
If the heat sink is not cleaned and it is not able to dissipate the expended heat,
the ACS 501’s thermal protection will operate, causing a fault indication
which stops the drive. The ACS 501 can be started again when the
temperature of the heat sink has fallen below the tripping level, which is
158°F (70°C).
The temperature of the heat sink can be read from the Control Panel Display,
Operating Data Parameter 8 (Drive Temperature).
Unit Cooling Air
R2 30 CFM (51 m
3
/hr)
R3 60 CFM (102 m
3
/hr)
R4 240 CFM (406 m
3
/hr)
R5 & R5.5 330 CFM (560 m
3
/hr)
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