Danfoss VLT FC 103 Operating Instructions Manual page 57

Start-up and Functional Tes...
Inspect for Description
•
Cable routing Use separate metallic conduits for each of the following:
•
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, if necessary.
•
Use shielded or twisted pair cable. Ensure that the shield is terminated correctly.
•
Cooling clearance Measure that top and bottom clearance is adequate to ensure proper air flow for cooling.
•
EMC considerations Check for proper installation regarding electromagnetic compatibility.
•
Environmental consider- See equipment label for the maximum ambient operating temperature limits.
ations
•
Humidity levels must be 5–95%, non-condensing.
•
Fusing and circuit Check for proper fusing or circuit breakers.
breakers
•
Check that all fuses are inserted firmly and in operational condition and that all circuit breakers are
in the open position.
•
Grounding The unit requires a ground wire from its chassis 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.
•
Input and output power Check for loose connections.
wiring
•
Check that motor and mains are in separate conduit or separated screened cables.
•
Panel interior Inspect that the unit interior is free of debris and corrosion.
•
Switches Ensure that all switch and disconnect settings are in the proper positions.
•
Vibration Check that the unit is mounted solidly or that shock mounts are used, as necessary.
•
Check for an unusual amount of vibration.
Table 4.1 Start-up Checklist
MG16J202
Operating Instructions
- Input power
- Motor wiring
- Control wiring
Danfoss A/S © Rev. 05/2014 All rights reserved.
☑
4 4
55