ABB ACS 502 Series, Installation & Start-Up Manual

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Chapter 4 – ACS 504 Installation Instructions
4-8 ACS 502 Installation & Start-up Manual
The losses shown in the preceding table occur when the output current is I
NSQ
and input current is I
INSQ
. The temperature rise of the cooling air with these air
volumes and losses is below 64
°
F (18
°
C).
Note: Dimension A7 is given with the assumption that the air exhaust is on
top part of the door or side walls. This dimension may be reduced if the
opening is on the roof of the cabinet.
GENERAL WARNING! When planning or inspecting the installation of
ACS 504, pay special attention to the cooling air flow. Prevent the air from
circulating from the outlet of the unit back to the inlet. Improper layout and
inadequate channelling may lead to re-circulating air flow and excessive
temperature rise within the enclosure. It may be necessary to install a
horizontal baffle at the Inverter Module top level to keep the cool and warm
air separate.
If the cooling air contains dust, clean the cooling surfaces of the unit regularly
using compressed air and a brush. If there are filters at the air inlet of the
enclosure, check their condition regularly and replace if needed.
If the cooling ability is reduced too much or if the ambient temperature
exceeds 104
°
F (40
°
C), the thermal protection of the drive will operate causing
an overtemperature warning and eventual tripping. The tripping temperature
of the heatsink is 185
°
F (85
°
C). The drive can be started again when the
temperature of the heatsink is below 167
°
F (75
°
C). (A faster way to start
would be to disconnect the power, wait for the display to turn off, and power
up again.)
The temperature of the heatsink can be read from the control panel display.
The temperature difference between the heatsink and ambient is an indication
of the prevailing cooling conditions and can be utilized in preventive
maintenance or in installation inspection. When the ACS 504 has been
running at I
R
for more than an hour, the difference should be less than 77
°
F
(25
°
C). When the ACS 504 has been running at I
RSQ
(f
OUT
at 60Hz) for more
than an hour, the difference should be less than 86
°
F (30
°
C).
Note: When planning or inspecting the installation of your ACS 504, pay
special attention to the cooling air flow. Do not let the air circulate
from the outlet of the drive to the inlet. This is especially important
when you install a module in an area where improper lay-out and
inadequate channelling may lead to re-circulating air flow and
excessive temperature rise within the cubicle.
Control Unit
When planning the installation of the Control Unit in an enclosure, ensure that
the temperature of the air surrounding the Control Unit does not exceed 122
°
F
(50
°
C). Do not block the openings on the cover of the unit. Direct the warm
exhaust air away from the Inverter Module so that it does not heat the Control
Unit.