4.9 Installation Check List
Before completing installation of the unit, inspect the entire installation as detailed in Table 4.5. Check and mark the 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 any power factor correction caps on motor(s)
•
Adjust any power factor correction caps on the line power side and ensure that they are dampened
Cable routing
•
Ensure that motor wiring and control wiring are separated or 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 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
•
Measure that top and bottom clearance is adequate to ensure proper air flow for cooling, see 3.3 Mounting
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 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 grounding
Input and output
power wiring
•
Check for loose connections.
•
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.
•
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 4.5 Installation Check List
CAUTION
POTENTIAL HAZARD IN THE EVENT OF INTERNAL FAILURE!
Risk of personal injury when the adjustable frequency drive is not properly closed. Before applying power, ensure all
safety covers are in place and securely fastened.
Electrical Installation
VLT
®
HVAC Drive Instruction Manual
MG11AJ22 - Rev. 2013-09-13 23
4 4
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