Danfoss VLT HVAC Design Guide

3.1.13 IP 21/IP 4X/ TYPE 1 Enclosure Kit
IP 21/IP 4X top/ TYPE 1 is an optional enclosure element available for IP 20 Compact units, enclosure size A2-A3, B3+B4 and C3+C4.
If the enclosure kit is used, an IP 20 unit is upgraded to comply with enclosure IP 21/ 4X top/TYPE 1.
The IP 4X top can be applied to all standard IP 20 VLT HVAC Drive variants.
A – Top cover
B – Brim
C – Base part
D – Base cover
E – Screw(s)
Place the top cover as
shown. If an A or B option
is used the brim must be fit-
ted to cover the top inlet.
Place the base part C at the
bottom of the drive and use
the clamps from the acces-
sory bag to correctly fasten
the cables. Holes for cable
glands:
Size A2: 2x M25 and 3xM32
Size A3: 3xM25 and 3xM32
A2 Enclosure A3 Enclosure
Dimensions
Enclosure
type
Height (mm)
A
Width (mm)
B
Depth (mm)
C*
A2 372 90 205
A3 372 130 205
B3 475 165 249
B4 670 255 246
C3 755 329 337
C4 950 391 337
* If option A/B is used, the depth will increase (see section Me-
chanical Dimensions for details)
A2, A3, B3 B4, C3, C4
3 VLT HVAC Drive Selection VLT
®
HVAC Drive Design Guide
62 MG.11.B9.02 - VLT
®
is a registered Danfoss trademark
3

Danfoss VLT HVAC Specifications

General

Enclosure Rating	IP20, IP21, IP54, IP55, IP66
Storage Temperature Range	-25°C to +70°C
Output Voltage Range	0-100% of supply voltage
Communication Protocols	Modbus RTU, BACnet, Ethernet/IP, Profibus DP
Ambient Temperature Range	-10°C to +50°C (without derating)
Relative Humidity	5% to 95% non-condensing
Altitude	Up to 1000 m without derating
Cooling Method	Air cooled
Application	HVAC systems, Pumps, Fans, Compressors
Voltage Range	200-240 V, 380-500 V, 525-600 V
Frequency Range	0 Hz to 590 Hz