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If the “Low Ambient Option” has been selected in YORK
7N
, an internal thermostatically-
controlled heater is provided in the VFD cabinet to maintain proper ambient operating
temperatures.
At commissioning or after a power outage, when the ambient and VFD temperature is
below 5 degrees Fahrenheit, input power should be applied to the drive for 30 minutes to
allow the VFD internal components to reach operating temperature before a start
command is issued to allow the VFD’s internal temperature to adjust. After this warm-up
period, the VFD can be operated normally.
Содержание York AYK550
Страница 254: ...G YORK A Johnson Controls Company Bypass Package Components Note Solution AHU Does Not have VFD Input Service Switch...
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