9.3.2 Dust
When installing the drive in dusty environments, pay
attention to the following:
Periodic maintenance
When dust accumulates on electronic components, it acts
as a layer of insulation. This layer reduces the cooling
capacity of the components, and the components become
warmer. The hotter environment decreases the life of the
electronic components.
Keep the heat sink and fans free from dust build-up. For
more service and maintenance information, refer to the
operating guide
.
Cooling fans
Fans provide airflow to cool the drive. When fans are
exposed to dusty environments, the dust can damage the
fan bearings and cause premature fan failure. Also, dust
can accumulate on fan blades causing an imbalance which
prevents the fans from properly cooling the unit.
9.3.3 Potentially Explosive Atmospheres
WARNING
EXPLOSIVE ATMOSPHERE
Do not install the drive in a potentially explosive
atmosphere. Install the unit in a cabinet outside of this
area. Failure to follow this guideline increases risk of
death or serious injury.
Systems operated in potentially explosive atmospheres
must fulfill special conditions. EU Directive 94/9/EC
(ATEX 95) classifies the operation of electronic devices in
potentially explosive atmospheres.
•
Class d specifies that if a spark occurs, it is
contained in a protected area.
•
Class e prohibits any occurrence of a spark.
Motors with class d protection
Does not require approval. Special wiring and containment
are required.
Motors with class e protection
When combined with an ATEX approved PTC monitoring
device like the VLT
®
PTC Thermistor Card MCB 112, instal-
lation does not need an individual approval from an
approbated organization.
Motors with class d/e protection
The motor itself has an e ignition protection class, while
the motor cabling and connection environment is in
compliance with the d classification. To attenuate the high
peak voltage, use a sine-wave filter at the drive output.
When using a drive in a potentially explosive
atmosphere, use the following:
•
Motors with ignition protection class d or e.
•
PTC temperature sensor to monitor the motor
temperature.
•
Short motor cables.
•
Sine-wave output filters when shielded motor
cables are not used.
NOTICE
MOTOR THERMISTOR SENSOR MONITORING
Drives with the VLT
®
PTC Thermistor Card MCB 112
option are PTB-certified for potentially explosive
atmospheres.
9.4 Mounting Configurations
lists the available mounting configurations for
each enclosure. For specific panel/wall mounting or
pedestal mounting installation instructions, see the
operating guide
. See also
chapter 8 Exterior and Terminal
.
NOTICE
Improper mounting can result in overheating and
reduced performance.
Enclosure
Wall/cabinet mount
Pedestal mount
(Standalone)
D1h
X
X
D2h
X
X
D3h
X
1)
–
D4h
X
1)
–
D5h
–
X
D6h
–
X
D7h
–
X
D8h
–
X
E1h
–
X
E2h
–
X
E3h
X
2)
–
E4h
X
2)
–
Table 9.1 Mounting Configurations
1) Can be wall mounted, but Danfoss recommends that the drive is
panel mounted inside an enclosure due to its protection rating.
2) Drive can be mounted in the following configurations:
-
Vertically on the backplate of the panel.
-
Vertically upside down on the backplate of the panel.
Contact factory.
-
Horizontally on its back, mounted on the backplate of the
panel. Contact factory.
-
Horizontally on its side, mounted on floor of the panel.
Contact factory.
Mechanical Installation Con...
Design Guide
MG38C202
Danfoss A/S © 01/2018 All rights reserved.
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