Mechanical Installation Considerations; Storage; Operating Environment; Gases - Danfoss VLT AQUA FC 202 Design Manual

VLT® AQUA Drive FC 202
Design Guide

9 Mechanical Installation Considerations

9.1 Storage

Store the drive in a dry location and keep the equipment sealed in its packaging until installation. Periodic forming (capacitor charg-
ing) is not necessary during storage unless storage exceeds 12 months.
If shelf life is longer than 4 years, a simple method, under no load conditions, can be used to check the condition of the capacitors.
If the stable DC-link voltage is approximately equal to 1.41 x U
either measure it or check the corresponding parameters in the display.
If the DC-link voltage is significantly smaller than 1.41 x U
at a low level and does not reach approximately 1.41 x U

9.2 Operating Environment

In environments with airborne liquids, particles, or corrosive gases, ensure that the IP/Type rating of the equipment matches the
installation environment. For specifications regarding ambient conditions, see the Ambient Conditions section.
CONDENSATION
Moisture can condense on the electronic components and cause short circuits. Avoid installation in areas subject to frost. Install
an optional space heater when the drive is colder than the ambient air. Operating in standby mode reduces the risk of condensa-
tion as long as the power dissipation keeps the circuitry free of moisture.
EXTREME AMBIENT CONDITIONS
Hot or cold temperatures compromise unit performance and longevity.
-
Do not operate in environments where the ambient temperature exceeds 55 °C (131 °F).
-
The drive can operate at temperatures down to -10 °C (14 °F). However, proper operation at rated load is only guaranteed at
0 °C (32 °F) or higher.
-
If the temperature exceeds ambient temperature limits, extra air conditioning of the cabinet or installation site is required.

9.2.1 Gases

Aggressive gases, such as hydrogen sulfide, chlorine, or ammonia can damage electrical and mechanical components of a drive.
Contamination of the cooling air can also cause the gradual decomposition of PCB tracks and door seals. Aggressive contaminants
are often present in sewage treatment plants or swimming pools. A clear sign of an aggressive atmosphere is corroded copper.
In aggressive atmospheres, restricted IP enclosures are recommended along with conformal-coated circuit boards.
The drive comes standard with class 3C2 coating. On request, class 3C3 coating is available.
Table 46: Conformal Coating Class Ratings
Gas type Unit
Sea salt n/a
Sulfur oxide mg/m
Hydrogen sulfide mg/m
Chlorine mg/m
100 | Danfoss A/S © 2020.09
mains
mains
N O T I C E
N O T I C E
N O T I C E
Class
3C1 3C2
– Average value
None Salt mist
3
0.1 0.3
3
0.01 0.1
3
0.0.1 0.1
, the capacitors are OK. To check the DC-link voltage in the drive,
mains
, it takes time for the capacitors to recover. If the DC-link voltage stays
, contact the local service agent.
Maximum value
(1)
1.0
0.5
0.03
Mechanical Installation
Considerations
3C3
Average value Maximum value
Salt mist
5.0 10
3.0 10
0.3 1.0
AJ300847815559en-000101 / 130R0337
(1)