Access; Motor; Adjusting Parameters; Electrical Installation - Johnson Controls VFD66 Drive User Manual

1.5

Access

Access must be restricted to authorized personnel only. Safety regulations which apply
at the place of use must be complied with. The IP (Ingress Protection) rating of the drive
is installation dependant.
1.6

Motor

Ensure the motor is installed in accordance with the manufacturer's recommendations.
Ensure the motor shaft is not exposed.
Standard squirrel cage induction motors are designed for single speed operation. If it is
intended to use the capability of a drive to run a motor at speeds above its designed
maximum, it is strongly recommended that the manufacturer is consulted first.
Low speeds may cause the motor to overheat because the cooling fan becomes less
effective. If necessary, an electric force vent fan should be used.
1.7

Adjusting parameters

Some parameters have a profound effect on the operation of the drive. They must not
be altered without careful consideration of the impact on the controlled system.
Measures must be taken to prevent unwanted changes due to error or tampering.
1.8

Electrical installation

1.8.1 Electric shock risk
The voltages present in the following locations can cause severe electric shock and may
be lethal:
• AC supply cables and connections
• Output cables and connections
• Many internal parts of the drive
Unless otherwise indicated, control terminals are single insulated and must not be
touched.
1.8.2 Isolation device
The AC supply must be disconnected from the drive using an approved isolation device
before any cover is removed from the drive or before any servicing work is performed.
1.8.3 STOP function
The STOP function does not remove dangerous voltages from the drive or the motor.
1.8.4 Ground leakage current
The drive is supplied with an internal EMC filter capacitor installed. If the input voltage to
the drive is supplied through an ELCB or RCD, these may trip due to the ground
leakage current. See section 4.3.1 Internal EMC filter on page 14 for further information
and how to disconnect the internal EMC capacitor.
The VFD66 series variable speed drives are intended to control equipment under normal
operating conditions. Where failure or malfunction of a VFD66 drive could lead to an
abnormal operating condition that could cause personal injury or damage to the
equipment or other property, other devices, (limit or safety controls) or systems (alarm or
WARNING
supervisory) intended to warn of, or protect against, failure or malfunction of the VFD66
drive must be incorporated into and maintained as part of the control system.
VFD66 User Guide
Issue Number: 2 www.johnsoncontrols.com
7