Pre-Installation Check; Installation Site Check - Danfoss VLT Option Panel Instruction Manual

Pre-installation Check

1. Compare option panel model number to
what was ordered.
2. Ensure each of following are rated for
same voltage:
• Drive
• Option panel
• Power line
• Motor
3. Ensure that panel output rating is equal to
or greater than motor total full load current
for full motor performance.
• For multiple motor applications, add the
full load current ratings of all motors.
• Motor power size and option panel must
match for proper overload protection.
• If panel rating is less than motor, full motor
output cannot be achieved.
4. Check motor wiring:
• Any disconnect between drive and motor
should be interlocked to drive safety
interlock circuit to avoid unwanted drive
trips.
• Do not connect power factor correction
capacitors between drive and motor.
• Two speed motors must be wired
permanently for full speed.
• Y-start, -run motors must be wired
permanently for run.

Installation Site Check

• Because the option panel relies on the
ambient air for cooling, it is important to
observe the limitations on ambient air
temperature. Derating concerns start above
40°C (104°F) and 3300 (1000m) feet
elevation above sea level.
• It is important with multiple panels to check
wall strength. Make sure that the proper
mounting screws or bolts are used.
• Ensure that the wall or floor area for
installation will support the weight of the unit.
• If construction work continues after the
equipment is mounted, it is important to keep
the interior free from concrete dust and
similar dirt. If the unit does not have power
applied to it, supply a protective covering. It is
important to ensure that the components
stay as clean as possible. It may be
necessary to clean the interior once
construction is completed.
• Keep drawings and manuals accessible for
detailed installation and operation
instructions. It is important that the manuals
be available for equipment operator.
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