Danfoss VLT HVAC User Manual

1.1.7. Caution
Caution
The frequency converter DC link capacitors remain charged after power has been disconnec-
ted. To avoid an electrical shock hazard, disconnect the frequency converter from the mains
before carrying out maintenance. Wait at least as follows before doing service on the fre-
quency converter:
Voltage
Min. Waiting Time
4 min. 15 min.
200 - 240 V
1.1 - 3.7 kW 5.5 - 45 kW
380 - 480 V
1.1 - 7.5 kW 11 - 90 kW
525 - 600 V 1.1 - 7.5 kW
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.
1.1.8. Installation at High Altitudes (PELV)
By altitudes above 2 km, please contact Danfoss Drives regarding PELV.
1.1.9. Avoid unintended Start
While the frequency converter is connected to mains, the motor can be started/stopped using
digital commands, bus commands, references or via the Local Control Panel.
• Disconnect the frequency converter from mains whenever personal safety considerations
make it necessary to avoid unintended start.
• To avoid unintended start, always activate the [OFF] key before changing parameters.
• Unless terminal 37 is turned off, an electronic fault, temporary overload, a fault in the
mains supply, or lost motor connection may cause a stopped motor to start.
1. Safety VLT
®
HVAC Drive Operating Instructions
6 MG.11.A4.02 - 09.10.06. VLT
®
is a registered Danfoss trademark
1

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