Danfoss VLT Refrigeration Drive FC 103 Operating Instructions Manual page 58

Commissioning
5.1.1 Pre-start
CAUTION
Before applying power to the unit, inspect the entire installation as detailed in Table 5.1. Check mark those items when
completed.
Inspect for
Auxiliary equipment
5 5
Cable routing
Control wiring
Cooling clearance
EMC considerations
Environmental consider-
ations
Fusing and circuit
breakers
Grounding
Input and output power
wiring
Panel interior
Switches
Vibration
Table 5.1 Start-up Checklist
54
®
VLT Refrigeration Drive FC 103 Low Harmonic Drive
Description
•
Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers on the input
power side of the frequency converter or output side to the motor. Ensure that they are ready for
full speed operation.
•
Check function and installation of any sensors used for feedback to the frequency converter.
•
Remove power factor correction capacitors on motors, if present.
•
Use separate metallic conduits for each of the following:
- Input power
- Motor wiring
- Control wiring
•
Check for broken or damaged wires and loose connections.
•
Check that control wiring is isolated from power and motor wiring for noise immunity.
•
Check the voltage source of the signals.
•
Use screened or twisted pair cable. Ensure that the screen is terminated correctly.
•
Measure that top and bottom clearance is adequate to ensure proper air flow for cooling.
•
Check for proper installation regarding electromagnetic compatibility.
•
See equipment label for the maximum ambient operating temperature limits.
•
Humidity levels must be 5–95%, non-condensing.
•
Check for proper fusing or circuit breakers.
•
Check that all fuses are inserted firmly and in operational condition, and that all circuit breakers are
in the open position.
•
The unit requires a ground wire from its enclosure to the building ground.
•
Check for good ground connections that are tight and free of oxidation.
•
Grounding to conduit or mounting the back panel to a metal surface is not sufficient.
•
Check for loose connections.
•
Check that motor and mains are in separate conduit or separated screened cables.
•
Inspect that the unit interior is free of debris and corrosion.
•
Ensure that all switch and disconnect settings are in the proper positions.
•
Check that the unit is mounted solidly or that shock mounts are used as necessary.
•
Check for an unusual amount of vibration.
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MG16N102