Danfoss 102 Operating Instructions Manual page 30

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
Auxiliary equipment
3 3
Cable routing
Control wiring
Cooling clearance
EMC considerations
Environmental consider-
ations
Fusing and circuit
breakers
Earthing (Grounding)
Input and output power
wiring
Panel interior
Switches
Vibration
Table 3.1 Start Up Check List
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
26
®
VLT HVAC Drive Operating Instructions
Description
•
Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers that may reside
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 caps on motor(s), if present
•
Ensure that input power, motor wiring and control wiring are separated or in three separate metallic
conduits for high frequency noise isolation
•
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
•
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 an earth wire (ground wire) from its chassis to the building earth (ground)
•
Check for good earth connections (ground connections) that are tight and free of oxidation
•
Earthing (grounding) to conduit or mounting the back panel to a metal surface is not a suitable
earth (ground)
•
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 dirt, metal chips, moisture, 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
MG11AI02 - VLT
®
is a registered Danfoss trademark
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