York YLAA Operation Manual page 13

Air-cooled scroll chillers with brazed plate heat exchangers
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Equipment Overview (Cont'd)
JOHNSON CONTROLS
• Number of compressors
• Low liquid temperature cut-out
• Low suction pressure cut-out
• High discharge pressure cut-out
• Anti-recycle timer (compressor start cycle time)
• Anti-coincident timer (delay compressor starts)
UNIT section to:
• Set time
• Set unit options
In addition, the microprocessor control center is capable of displaying the following data
points:
• Return and leaving liquid temperature
• Low leaving liquid temperature cut-out setting
• Low ambient temperature cut-out setting
• Outdoor air temperature
• English or Metric data
• Suction pressure cut-out setting
• Each system suction pressure
• Discharge pressure (optional)
• Anti-recycle timer status for each system
• Anti-coincident system start timer condition
• Compressor run status
• No cooling load condition
• Day, date and time
• Daily start/stop times
• Holiday status
• Automatic or manual system lead/lag control
• Lead system definition
• Compressor starts & operating hours (each compressor)
• Status of hot gas valves, evaporator heater and fan operation
• Run permissive status
FORM 150.72-EG6 (516)
13

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