Cooling - Danfoss VLT HVAC Drive FC 102 Design Manual

Mechanical Installation Con...

9.5 Cooling

NOTICE
Improper mounting can result in overheating and reduced performance. For proper mounting, refer to chapter 8 Exterior
and Terminal Dimensions.
•
Ensure that top and bottom clearance for air cooling is provided. Clearance requirement: 225 mm (9 in).
•
Provide sufficient airflow flow rate. See Table 9.2.
•
Consider derating for temperatures starting between 45 °C (113 °F) and 50 °C (122 °F) and elevation 1000 m (3300
ft) above sea level. See chapter 9.6 Derating for detailed information on derating.
The drive utilizes a back-channel cooling concept that removes heat sink cooling air. The heat sink cooling air carries
approximately 90% of the heat out of the back channel of the drive. Redirect the back-channel air from the panel or room
by using:
•
Duct cooling
Back-channel cooling kits are available to direct the heat sink cooling air out of the panel when IP20/Chassis drives
are installed in Rittal enclosures. Use of these kits reduce the heat in the panel and smaller door fans can be
specified.
•
Back-wall cooling
Installing top and base covers to the unit allows the back-channel cooling air to be ventilated out of the room.
NOTICE
A door fan is required on the enclosure to remove the heat losses not contained in the back channel of the drive and
those losses generated from other components installed inside the enclosure. The total required airflow must be
calculated so that the appropriate fan is selected. Some enclosure manufacturers offer software for performing airflow
calculations.
Secure the necessary airflow over the heat sink.
Enclosure Models
380–480 V
E1 –
E2
E1 P355–P450
E2
Table 9.2 E1–E2 Airflow Rate
Enclosure Protection type
F1–F4 IP21/Type 1
IP54/Type 12
F8–F13 IP21/Type 1
IP54/Type 12
Table 9.3 F1–F4 and F8–F13 Airflow Rates
MG16C302
Design Guide
Door fan/top fan [m
525–690 V
P450–P500 340 (200)
255 (150)
P560–P630 340 (200)
255 (150)
Door fan/top fan [m
700 (412)
525 (309)
700 (412)
525 (309)
Danfoss A/S © 11/2017 All rights reserved.
3 /hr (cfm)] Heat sink fan [m
1105 (650)
1105 (650)
1445 (850)
1445 (850)
3
/hr (cfm)] Heat sink fan [m
985 (580)
985 (580)
985 (580)
985 (580)
9 9
3 /hr (cfm)]
3
/hr (cfm)]
161