Installation, Operation and Maintenance Manual
Field Installed Variable Frequency Drives (VFD’s
4
Subject to change without notice.
120.7-IM (1218)
General Information
Inspection of Equipment
Upon receiving of the variable frequency drive (VFD),
carefully inspect for visible or concealed interior/exterior
damage� If damage occurred during transit, contact the
freight carrier immediately and file a damage claim report.
Inspect the unit data plate to verify the VFD is the appropriate
one for the application� (Voltage, VFD and Evaporator Motor
HP are compatible)
Some options/accessory items may have been shipped
loose in one or more boxes� These may have been delivered
to another location, or possibly within the unit� If shipped with
the unit there will be a sticker that identifies where in the
unit the shipped loose items are located. Confirm that all of
these options/accessory items are also available and that no
damage has occurred�
Handling
Handle the VFD as prescribed by the VFD manufacturer�
Location
Before VFD can be installed, a thorough study should be
made� Attention must be given to:
A.
Wall, panel or structure load limitations are appropriate
B.
Required service clearances are present
C.
Location of wiring and safety devices is acceptable
D.
Temperature and humidity levels will be within
manufacturer tolerances
E.
Mounting location is as recommended by the VFD
manufacturer
F.
Confirm that the mounting location will not subject the
VFD to any moisture
G.
Make sure that adequate ventilation is provided as
recommended by the VFD manufacturer
H.
Device will not be located near heat radiating elements
I.
Make sure all power wiring and control wiring can be
separated per industry accepted practices
Programming
Refer to the manual with the VFD for programming and
troubleshooting instructions�
INFORMATION
Confirm that the incoming power supply
matches the unit and VFD data tags�
ELECTRICAL HAZARD
Only a qualified licensed electrician or
other individual that is properly trained in
handling live electrical components should
perform any installation, adjustment,
repair or maintenance� Failure to follow all
electrical safety precautions and industry
accepted practices when exposed to
live electrical components could result in
death or serious injury�
INFORMATION
Use Copper Conductors Only� Failure
to use copper conductors may result in
equipment damage�
INFORMATION
All electrical wiring must be in accordance
with NEC (National Electrical Code), NFPA
(National Fire Protection Agency) most
current versions as well as any applicable
state or local codes�
INFORMATION
The correct phase sequence of the
incoming power supply is a requirement�
If the phase sequence is not correct it
could cause damage or failure to electrical
components� Reverse the incoming wiring
to resolve the issue� Do not switch any
internal unit wiring�
INFORMATION
Unit wiring and components have been
designed for the specific unit application
and factory assigned controls� Do not use
the unit transformers or alter the unit wiring
to interface any field supplied accessories
or controls�
