Taco SKV SelfSensing

Taco® SKV
84 302-365, Effective: June 5, 2017
© 2017 Taco, Inc.
Table 23: Inspection Checklist
B.5 Applying Power to the Frequency Converter
DANGER: HIGH VOLTAGE! Frequency converters contain high voltage when connected to AC mains.
Installation, start-up and maintenance should be performed by qualified personnel only. Failure to comply
could result in death or serious injury.
Inspect for Description Check?
Auxiliary equipment – Look for auxiliary equipment, switches, disconnects, or input fuses/cir-
cuit 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.
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 – 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 considerations – See equipment label for the maximum ambient operating temperature
limits.
– Humidity levels must be 5-95% non-condensing.
Fusing and circuit breakers – 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.
(grounding) – The unit requires an earth wire(ground wire) from its chassis to the build-
ing 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).
Input and output power wiring – Check for loose connections.
– Check that motor and mains are in separate conduit or separated
screened cables.
Panel interior – Inspect that the unit interior is free of dirt, metal chips, moisture, and cor-
rosion.
Switches – Ensure that all switch and disconnect settings are in the proper posi-
tions.
Vibration – Check that the unit is mounted solidly or that shock mounts are used, as
necessary.
– Check for an unusual amount of vibration.