Loss of motor efficiency Loss of compressor efficiency VFD condenser fouling Loss of VFD efficiency Chiller motor fault Loss of chiller efficiency Cooling Tower Fault Detection Broken fan belt on tower fan Loss of Tower efficiency 3.22 Chilled Water Energy Calculator (typical of 1) Chilled Cooling Demand - Energy Meter: The controller monitor the chilled water supply temperature, chilled water return temperature and chilled water flow to the building and calculate current energy demand on a continual basis. These values shall be made available to the system at all times. Alarm shall be generated as follows: Invalid Reading: Sensor readings indicate an invalid demand value. Peak Demand History: The controller shall monitor and record the peak (high and low) demand readings from the chilled water energy meter. Peak readings shall be recorded on a daily, month-to-date, and year-to-date basis. Usage History: The controller shall monitor and record chilled water energy meter readings so as to provide an energy consumption history. Usage readings shall be recorded on a daily, month-to-date, and year-to-date basis. 3.25 Chiller Interface (typical of 4) Chiller Interface Monitor: Current chiller status and operating conditions shall be monitored through its communications interface port. The interface monitor and trend the points as shown on the Points List. 3.26 Variable Frequency Drive Interface (typical of XX) Variable Frequency (VFD) Interface Monitor: Current VFD status and operating conditions shall be monitored through its communications interface port.
Loss of motor efficiency Loss of compressor efficiency VFD condenser fouling Loss of VFD efficiency Chiller motor fault Loss of chiller efficiency Cooling Tower Fault Detection Broken fan belt on tower fan Loss of Tower efficiency 3.22 Chilled Water Energy Calculator (typical of 1) Chilled Cooling Demand - Energy Meter: The controller monitor the chilled water supply temperature, chilled water return temperature and chilled water flow to the building and calculate current energy demand on a continual basis. These values shall be made available to the system at all times. Alarm shall be generated as follows: Invalid Reading: Sensor readings indicate an invalid demand value. Peak Demand History: The controller shall monitor and record the peak (high and low) demand readings from the chilled water energy meter. Peak readings shall be recorded on a daily, month-to-date, and year-to-date basis. Usage History: The controller shall monitor and record chilled water energy meter readings so as to provide an energy consumption history. Usage readings shall be recorded on a daily, month-to-date, and year-to-date basis. 3.25 Chiller Interface (typical of 4) Chiller Interface Monitor: Current chiller status and operating conditions shall be monitored through its communications interface port. The interface monitor and trend the points as shown on the Points List. 3.26 Variable Frequency Drive Interface (typical of XX) Variable Frequency (VFD) Interface Monitor: Current VFD status and operating conditions shall be monitored through its communications interface port.
Demand-Flow-Specification-V24.docx