Danfoss VLT FC 103 Instruction Manual page 35

Start-up and Functional Tes...
CAUTION
Before applying power to the unit, inspect the entire installation as detailed in Table 3.1. Check mark those items when
completed.
Inspect for Description
•
Auxiliary equipment Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers that may reside
on the input power side of the adjustable frequency drive 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 adjustable frequency drive.
•
Remove power factor correction caps on motor(s), if present.
•
Cable routing Ensure that input power, motor wiring and control wiring are separated or in three separate metallic
conduits for high frequency noise isolation.
•
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.
•
The use of shielded cable or twisted pair is recommended. Ensure that the shield is terminated
correctly.
•
Cooling clearance Make sure that the top and bottom clearance is adequate to ensure proper airflow 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 a suitable ground.
•
Input and output power Check for loose connections.
wiring
•
Check that motor and line power are in separate conduits or separated shielded cables.
•
Panel interior Make sure that the unit interior is free of dirt, metal chips, moisture, 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 3.1 Start-up Checklist
MG16E222
Instruction Manual
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
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