Danfoss VLT Design Guide

5.1.4 Mechanical Mounting
All A, B and C enclosures allow side-by-side installation.
Exception: If a IP21 kit is used, there has to be a clearance
between the enclosures. For enclosures A2, A3, A4, B3, B4
and C3 the minimum clearance is 50 mm, for C4 it is 75
mm.
For optimal cooling conditions allow a free air passage
above and below the frequency converter. See Table 5.6.
Illustration 5.1
Enclosure: A2 A3 A4 A5 B1 B2
a/b [mm] 100 100 100 100 200 200
Enclosure: B3 B4 C1 C2 C3 C4
a/b [mm] 200 200 200 225 200 225
Table 5.6 Air Passage for Different Enclosures
1. Drill holes in accordance with the measurements
given.
2. Provide screws suitable for the surface on which
you want to mount the frequency converter.
Retighten all four screws.
Illustration 5.2
Illustration 5.3
Illustration 5.4
NOTE
When mounting enclosure sizes A4, A5, B1, B2, B3, B4, C1,
C2, C3 and C4 on a non-solid back wall,
the frequency converter must be provided with a back
plate A due to insufficient cooling air over the heat sink.
How to Install
VLT
®
Refrigeration Drive Design Guide
60 MG16G102 - VLT
®
is a registered Danfoss trademark
5
5

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)