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Voltage Measurements
Consider the following when checking voltage measurements:
• Before energizing the starter, check the incoming lines for properly balanced volt-
ages.
• Close the circuit breaker to apply power to the starter. Verify the 120 vac control volt-
age.
• Visually check to ensure that all fans are running (if applicable).
• Verify phase sequence at line terminals. Incorrect phase sequence will result in a
shunt trip of the circuit breaker.
• Verify that the phase rotation of the lines to the motor is correct.
• If the motor is found to be rotating in the wrong direction, interchange any two phases
to the motor.
• Start the unit.
• When unit reaches full speed, monitor the running current to ensure that the motor is
not overloaded.
Oil Charge
The 19XL compressor holds approximately 8 gal. (30 L) of oil. The machine will be shipped
with oil in the compressor. When the sump is full, the oil level should be no higher than the
middle of the upper sight glass and minimum level is the bottom of the lower sight glass (Figure
2A or Figure 2B). If oil is added, it must meet Carrier’s specification for centrifugal compressor
usage as described in the Oil Changes section. Charge the oil through the oil charging valve,