required for the installation. When using multiple
adjustable frequency drives in 1 enclosure, mount each
adjustable frequency drive on its own back panel and
support it along the mid-section of the panel. The
backchannel cooling kits are similar in construction for all
enclosures. The E2 kit is mounted “in frame” for extra
support of the adjustable frequency drive.
Using these kits as described removes 85% of the losses
via the backchannel using the adjustable frequency drive’s
main heatsink fan. Remove the remaining 15% via the
enclosure door.
NOTICE!
See the
Top-only Backchannel Cooling Kit Instruction,
175R1107,
for further information.
Ordering information
•
Enclosure type E2: 176F1776
3.4.3 Installation of Top and Bottom Covers
for Rittal Enclosures
The top and bottom covers, installed onto IP00 adjustable
frequency drives, direct the heatsink cooling air in and out
the back of the adjustable frequency drive. The kits are
applicable to enclosure type E2, IP00. These kits are
designed and tested to be used with IP00/Chassis
adjustable frequency drives in Rittal TS8 enclosures.
Notes:
1.
If external duct work is added to the exhaust
path of the adjustable frequency drive, extra back
pressure reduces the cooling of the adjustable
frequency drive. Derate the adjustable frequency
drive to accommodate the reduced cooling. First,
calculate the pressure drop, then refer to
to
2.
A door fan is required on the enclosure to
remove the heat losses not contained in the
backchannel of the adjustable frequency drive
and any additional losses generated from other
components installed inside the enclosure.
Calculate the total required airflow to select the
appropriate fans. Some enclosure manufacturers
offer software for performing the calculations
(Rittal Therm 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 (113 °F) for the enclosure
size E2 adjustable frequency drive is 782 m
3
/h
(460 cfm).
NOTICE!
See the instruction for
Top and Bottom Covers - Rittal
Enclosure, 177R0076,
for further information.
Ordering information
•
Enclosure size E2: 176F1783
3.4.4 Installation of Top and Bottom Covers
Top and bottom covers can be installed on enclosure size
E2. These kits direct the backchannel airflow in and out the
back of the adjustable frequency drive instead of directing
the airflow in at the bottom and out at the top of the
adjustable frequency drive (when the adjustable frequency
drives 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 adjustable frequency drive, extra back
pressure reduces the cooling of the adjustable
frequency drive. Derate the adjustable frequency
drive to accommodate the reduced cooling.
Calculate the pressure drop, then refer to
to
.
2.
A door fan is required on the enclosure to
remove the heat losses not contained in the
backchannel of the adjustable frequency drive
and any additional losses generated from other
components installed inside the enclosure.
Calculate the total required airflow to select the
appropriate fans. Some enclosure manufacturers
offer software for performing the calculations
(Rittal Therm 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 (113 °F) for the enclosure
size E2 adjustable frequency drive is 782 m
3
/h
(460 cfm).
NOTICE!
See the
Top and Bottom Covers Only Instruction,
175R1106,
for further information.
Ordering information
•
Enclosure size E2: 176F1861
Mechanical Installation
Instruction Manual
MG11F522
Danfoss A/S © 08/2014 All rights reserved.
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