4.9 Installation Check List
Before completing installation of the unit, inspect the entire installation as detailed in
. Check and mark the items
when completed.
Inspect for
Description
☑
Auxiliary equipment
•
Look for auxiliary equipment, switches, disconnects, or input fuses/circuit breakers, which 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 the function and installation of any sensors used for feedback to the adjustable frequency drive.
•
Remove any power factor correction caps on the motor(s).
•
Adjust any power factor correction caps on the line power side and ensure that they are dampened.
Cable routing
•
Ensure that the motor wiring and control wiring are separated, shielded, or in three separate metallic
conduits for high-frequency interference isolation.
Control wiring
•
Check for broken or damaged wires and loose connections.
•
Check that the 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
•
Ensure the top and bottom clearance is adequate to ensure proper air flow for cooling, see
.
Ambient conditions
•
Check that requirements for ambient conditions are met.
Fusing and circuit
breakers
•
Check for proper fusing or circuit breakers.
•
Check that all fuses are inserted firmly and are in operational condition and that all circuit breakers are in
the open position.
Grounding
•
Check for sufficient ground connections and ensure the those are tight and free of oxidation.
Grounding to conduit, or mounting the back panel to a metal surface, is not a suitable grounding.
Input and output
power wiring
•
Check for loose connections.
•
Check that the motor and line cables are in separate conduit or separated shielded cables.
Panel interior
•
Inspect to ensure that the unit interior is free of dirt, metal chips, moisture, and corrosion.
•
Check that the unit is mounted on an unpainted, metal surface.
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 4.4 Installation Check List
CAUTION
POTENTIAL HAZARD IN THE EVENT OF INTERNAL FAILURE
Risk of personal injury if the adjustable frequency drive is not properly closed.
•
Before applying power, ensure all safety covers are in place and securely fastened.
Electrical Installation
Instruction Manual
22
Danfoss A/S © Rev. 09/2014 All rights reserved.
MG33AP22
4
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