18.
3.0
ELECTRICAL
3.1
Starter and Wiring
The separator wiring diagram furnished with the starter should be followed. See Description of Operations
/ Display and Control manual for typical schematics. The control panel is pre-wired and receives control
power from terminals on the line side of the motor starter. The control transformer, located in the control
panel, is sized for the compressor controls only. Do not connect additional loads to this transformer.
During initial set up check to see if transformer primary is wired for proper voltage.
3.1.1
Voltage
KI-Series (10 – 50 HP) are configured so that the operating voltage can be changed to suit typical power
supply voltages in North America. It will be necessary to change several wiring connections on
compressor components and control settings to properly convert a machine from one voltage
configuration to another, as follows:
1. Main Motor – Wiring connection change
2. Fan Motor – Wiring connection change
3. Control Voltage Transformer – Wiring connection change
4. Main Motor Overload setting – Control Panel Setting Change
5. Fan Motor Overload setting – Control Panel Setting Change
The KI (60-100 HP) and all KIV compressors are 460 volt only.
3.1.2
Steps for Voltage Conversion
WARNING
The following procedures must be performed by qualified personnel. Failure to do so may
result in death or personnel due to electrocution.
Changing the voltage connections for the KI (10-50 HP), should follow these generalized steps:
1. Main Motor – the main motor wiring connection diagrams for each supply voltage are supplied on
the electrical schematic for the machine. Change the connection wires to the desired
configuration in the main motor at the starter on the load side of the main motor contactors or
terminal blocks, according to the electrical schematic.
2. Fan motor - the fan motor wiring connection diagrams for each supply voltage are supplied on
inside the fan motor junction box and on the electrical schematic for the machine. Change the
connection wires to the desired configuration in the main motor at the fan motor conduit box for
10 – 30 HP units and at the starter box terminal connections for 40 – 50 HP units, according to
the electrical schematic.
3. Control Voltage Transformer - the transformer has multiple input tap connection points for various
voltages. Connect the input wires according to the supplied voltage.
Summary of Contents for KI Series
Page 1: ...1 Model __________________ Serial __________________ Rotary Screw Air Compressors...
Page 8: ...7 INTENTIONALLY BLANK...
Page 9: ...8 CHAPTER 1 GENERAL INFORMATION...
Page 19: ...10 CHAPTER 2 INSTALLATION INSTRUCTIONS...
Page 26: ...17 CHAPTER 3 ELECTRICAL INFORMATION...
Page 30: ...21 CHAPTER 4 COMPRESSOR LUBRICANT...
Page 39: ...30 INTENTIONALLY BLANK...
Page 40: ...31 CHAPTER 5 AIR INLET FILTER INFORMATION...
Page 43: ...34 INTENTIONALLY BLANK...
Page 44: ...35 CHAPTER 6 COMPRESSOR OPERATIONS...
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Page 50: ...41 CHAPTER 7 TROUBLESHOOTING...
Page 57: ...48 CHAPTER 8 FORMS RECORDS AND ELECTRICAL SCHEMATICS...
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