Installation, Operation and Maintenance 3 - 5
bypass contactor closes. This would result in line
voltage dips and dimming of lights whenever the
chiller starts, and should be avoided. Following the
prescribed selections and control settings will result
in reliable chiller starting, while maximizing motor and
contactor life.
Selections in the following table are based on the
following startup ramp. The initial current is limited to
200% of the max compressor rated load amps. Over
a period of 5 seconds the inrush is allowed to
increase to a value approximately equal to 300% of
the max load amps. These settings produce reliable
starting over the chiller’s operating range. For the
controller settings prescribed, the compressor motor
comes up to full speed consistently within the
Maximum Acceleration Time as factory set on UCP2.
See Section 5 for factory settings of the Maximum
Acceleration Timer.
Solid-state Starter Controller Settings
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