R90 - 160N / R90 - 160I / R90 - 160NE / R90 - 160IE
http://www.ingersollrandproducts.com
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7.0 INSTALLATION
7.3 ELECTRICAL
CAUTION
This procedure should only be carried out by a qualified electrician, electrical contractor or your local
Ingersoll Rand Distributor or Customer Center.
The compressor should be properly grounded /
earthed in accordance with Local and National Code
requirements.
Installation of this compressor must be in accordance
with recognized electrical codes and any local Health and
Safety Codes.
The compressor must have its own isolator situated
adjacent to it. The fuse protecting the circuit and the
compressor must be selected in accordance with local
and national code requirements on the basis of the data
provided in the general information section
Feeder cables should be sized by the customer/electrical
contractor to ensure that the circuit is balanced and not
overloaded by other electrical equipment. The length
of wiring from a suitable electrical feed point is critical
as voltage drops may impair the performance of the
compressor.
For VSD, cable sizes may vary considerably so the line
reactor is equipped with copper bus connections.
These connections can accept bolts between 6mm and
12mm.
Feeder cable connections to incoming terminals L1-L2-L3
should be tight and clean.
The applied voltage must be compatible with the
compressor data plate ratings.
The control circuit transformer has different voltage
tappings. Ensure that these are set for the specific applied
voltage prior to starting.
A hole with removable blind plate is provided for
incoming power connection. Remove blind plate to cut
hole as required. If it is necessary to make a hole in the
control box in a different location, care should be taken
to not allow metal shavings to enter the starter and other
electrical components within the box. If another hole is
used, the original hole must be blocked off.
The feeder cable must be suitably glanded in to the
starter box to maintain proper ingress protection. Fixed
speed starter boxes are rated for NEMA4/IP65, and VSD
starter boxes are rated for NEMA12/IP54. For VSD starter
boxes, the feeder cable must be glanded to ensure that
dirty air does not by-pass the filters.
On completion of electrical installation, check that blower
or fan motor rotation is correct.
For VSD, this machine is designed for use, where the
electricity supply is separated from nearby residential
and commercial areas. If the machine is to be used in the
light industrial, residential or commercial environment
where the local supply network is shared, further radio
frequency (RF) screening measures may be required.
Consult your local distributor/supplier for details of the
optional RF filter.
For VSD, the compressor has a anti-condensation heater
and thermostat in the electrical box. This circuit can be
connected to an independent electrical supply of either
110V or 230V single phase, dependant on the country
of installation. The supply should be suitably fused
and an independent isolator installed adjacent to the
compressor. Verify that thermostat is adjusted to 85˚F
(29˚C). This should be done in accordance with local
and national codes. It is good practice and sometimes
mandatory, to display suitable signs warning that the
machine has two separate electrical supplies which both
must be isolated before any work is attempted.
For VSD, alternately the heater circuit can be supplied
from the 110V tapping of the control transformer and
connected as shown on schematic wiring diagram.
CAUTION
Never test the insulation resistance of any part of
the machines electrical circuits, including the motor
without completely disconnecting the following.
Primary side of control power transformer
Input power and motor cables from soft starter
(if equipped)
Input power and motor cables from the main
VSD (if equipped)
Input power and motor cables from the blower
VSD (if equipped)
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NOTICE
Main and fan motor insulation must be tested by
the competant electrician prior to initial Start-up
or following an extended shutdown period in cold
damp conditions.
