Installation Environment; Planning The Installation Site; Mounting; Cooling And Airflow - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Mechanical Installation

3.3 Installation Environment

3.3.1 Planning the Installation Site

Select the best possible operation site by considering the
following (see details on the following pages, and in the
Design Guide):
•
Ambient operating temperature
•
Installation method
•
Cooling
•
Position of the unit
•
Cable routing
•
Voltage and current supply from power source
•
Current rating within range
•
Fuse ratings if not using built-in fuses

3.4 Mounting

3.4.1 Cooling and Airflow

Cooling
Cooling can be obtained in different ways, by using the
cooling ducts in the bottom and the top of the unit, by
taking air in and out the back of the unit or by combining
the cooling possibilities.
Enclosure protection
IP21/NEMA 1
IP54/NEMA 12
Table 3.1 Heat Sink Air Flow
MG21B202
Operating Instructions
Frame size
D13
(LHD120)
E9 P315-P400
(LHD210)
F18
(LHD330)
Danfoss A/S © Rev. 2014-01-22 All rights reserved.
Back cooling
The backchannel air can also be ventilated in and out the
back of a Rittal TS8 enclosure for frame size F18 LHD. This
offers a solution where the backchannel could take air
from outside the facility and return the heat loses outside
the facility thus reducing air-conditioning requirements.
NOTICE
A door fan(s) is required on the enclosure to remove the
heat losses not contained in the backchannel of the
drive and any additional losses generated from other
components installed inside the enclosure. The total
required air flow must be calculated so that the
appropriate fans can be selected. Some enclosure
manufacturers offer software for performing the
calculations (i.e. Rittal Therm software).
Airflow
The necessary airflow over the heat sink must be secured.
The flow rate is shown in Table 3.1.
Door fan/top fan airflow
Total airflow of multiple fans
3
3 door fans, 510 m /h (300 cfm)
(2+1, 3x170=510)
4 door fans, 680 m 3 /h (400 cfm)
(2+2, 4x170=680)
3
6 door fans, 3150 m /h (1854
cfm)
(6x525=3150)
Heat sink fan
Total airflow for multiple fans
3
2 heat sink fans, 1530 m /h (900
cfm)
(1+1, 2x765=1530)
2 heat sink fans, 2675 m 3 /h
(1574 cfm)
(1+1, 1230+1445=2675)
3
5 heat sink fans, 4485 m /h
(2639 cfm)
2+1+2, ((2x765)+(3x985)=4485)
17
3 3