Installation Of Top And Bottom Covers; Outside Installation/Nema 3R Kit For Rittal Enclosures - Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual

How to Install
additional losses generated from other
components installed inside the enclosure. The
total required airflow must be calculated so that
the appropriate fans can be selected. Some
enclosure manufacturers offer software for
performing the calculations (i.e. Rittal Therm
3 3
software).
If the frequency converter is the only heat
generating component in the enclosure, the
minimum airflow required at an ambient
temperature of 45 °C for the D3 and D4 frame
frequency converter is 391 m
minimum airflow required at an ambient
temperature of 45 °C for the E2 frame frequency
converter is 782 m
NOTICE
See the instruction for Top and Bottom Covers - Rittal
Enclosure, 177R0076, for further information.
Ordering information
Frame size D3: 176F1781
Frame size D4: 176F1782
Frame size E2: 176F1783

3.3.4 Installation of Top and Bottom Covers

Top and bottom covers can be installed on frame sizes D3,
D4 and E2. These kits are designed to be used to direct
the back-channel airflow in and out the back of the
frequency converter as opposed to in the bottom and out
the top of the frequency converter (when the frequency
converters are being mounted directly on a wall or inside a
welded enclosure).
Notes:
1. If external duct work is added to the exhaust
path of the frequency converter, additional back
pressure reduces the cooling of the frequency
converter. The frequency converter must be
derated to accommodate the reduced cooling.
First, the pressure drop must be calculated, then
refer to the derating tables located earlier in this
section.
2. A doorfan(s) is required on the enclosure to
remove the heat losses not contained in the
backchannel of the frequency converter and any
additional losses generated from other
components installed inside the enclosure. The
total required airflow 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).
38
®
VLT Automation Drive FC 300 Operating Instructions
3 /h (230 cfm). The
3 /h (460 cfm).
MG33U402 - Rev. 2013-12-16
If the frequency converter is the only heat
generating component in the enclosure, the
minimum airflow required at an ambient
temperature of 45 °C for the D3 and D4 frame
frequency converters is 391 m
minimum airflow required at an ambient
temperature of 45 °C for the E2 frame frequency
converter is 782 m 3 /h (460 cfm).
NOTICE
See the Top and Bottom Covers Only Instruction,
175R1106, for further information.
Ordering information
Frame size D3 and D4: 176F1862
Frame size E2: 176F1861
3.3.5 Outside Installation/NEMA 3R Kit for
Rittal Enclosures
Illustration 3.45
This section is for the installation of NEMA 3R kits available
for the frequency converter enclosure types D3, D4 and E2.
These kits are designed and tested to be used with IP00/
Chassis versions of these enclosure types in Rittal TS8
NEMA 3R or NEMA 4 enclosures. The NEMA-3R enclosure is
an outdoor enclosure that provides a degree of protection
against rain and ice. The NEMA-4 enclosure is an outdoor
3
/h (230 cfm). The