The following information is gathered during a performance scan:
| Type of Analysis | Description |
|---|---|
| Performance and Savings | |
| Scheduling | If the Occupancy Command object has a value in its priority array between priorities 1 to 15, the device is considered Scheduled. If no values exist in the priority array between priorities 1 to 15, the device is considered Unscheduled. If the Occupancy Command object cannot be found based on the search criteria the device is categorized as Undetermined. You can configure the search criteria using the options under the Preference menu. |
| Economizer | For Air Handling Units (AHUs): if the Economizer Status object value is True when the Outdoor Air Temperature object value is less than the Discharge Air Temperature Set Point object value during a trended 24-hour period, then the equipment is categorized as AHUs With Economizer. If the Economizer Status object value is not True when the Outdoor Air Temperature object value is less than the Discharge Air Temperature Set Point object value during a trended 24-hour period, the equipment is categorized as AHUs Without Economizer. If none of the required objects are found based on the search criteria or they do not have trends, the equipment rule is categorized as Undetermined. You can configure the search criteria using the options under the Preference menu. |
| Fan Motors | For AHUs: if the Supply Fan Output object always shows a value of 100% for a trended 24-hour period, then the equipment is categorized as Fans always running 100% and shows the message <<Point name>> is running on maximum speed. If the Supply Fan Output object is not found based on the search criteria the equipment is categorized as Undetermined. You can configure the search criteria using the options under the Preference menu. |
| AHU Reset Strategy | If the Discharge Air Temperature Setpoint or the Duct Static Pressure Setpoint does not change within a 24-hour period, then it is assumed that no reset strategy is implemented and the device is flagged. If neither point can be found, then the device is marked as Undetermined. |
| 100% Outdoor Air Handling Unit | For AHUs: if the Mixed Air Damper and Mixed Air Temperature objects are found, or the Outdoor Air Damper object value shows variable modulation between 0% and 100%, then the device is categorized as AHU Without 100% Outdoor Air. If neither Mixed Air objects are found and the Outdoor Air Damper object value shows 2-stage operation (0% or 100%), then the device is categorized as AHU With 100% Outdoor Air. If none of the objects identified above are found based on the search criteria the device is categorized as Undetermined. You can configure the search criteria using the options under the Preference menu. |
| Heating or Cooling Waste | For AHUs: if the Heating Output object value is greater than 0% when the Outdoor Air Temperature object value is above 80°F within a trended 24-hour period, then the equipment produces Heating Waste. If the Cooling Output object value is greater than 0% when the Outdoor Air Temperature object value is below 60° F within a trended 24-hour period, then the equipment produces Cooling Waste. If none of the objects or trends identified above could be found based on the search criteria the equipment is considered Undetermined. You can configure the search criteria using the options under the Preference menu. |
| Maintenance and Reliability | |
| Dirty Filter | For AHUs: if the pressure drop across the filter triggers the differential pressure switch or the Differential Pressure Sensor object value shows a pressure drop greater than 0.5 in. W.C., the equipment is considered to have a dirty filter. If the pressure drop across the filter does not trigger the differential pressure switch and the Differential Pressure Sensor object value shows a pressure drop less than 0.5 in. W.C., no notification is generated. If neither of the identified objects that represent the filter pressure switch or the filter pressure sensor are found during the performance scan, the equipment rule is categorized as Undetermined. You can configure the search criteria using the options under the Preference menu. |
| Unbound References | Identifies the unbound references by supervisory device. To view unbound references in the Power BI (PBI) report, navigate to . |
| Duplicated BACnet IDs | If more than one controller on the entire network has the same BACnet ID, the controller is included in the duplicate BACnet ID list. Controllers with duplicate BACnet IDs may cause communication problems when non-Metasys devices are part of the network. To view duplicate BACnet IDs in the PBI report, navigate to . |
| Alarm/Events |
Identifies controllers and points with alarms in the Metasys system and groups them based on alarm priority. Investigate and acknowledge alarms because they could be an indication of equipment issues or other underlying root causes that need to be addressed. Alternatively, it could mean that alarm thresholds need to be adjusted to produce fewer alarms, so that operators can focus on alarms that are true indicators of problems. The performance report shows alarms that are not considered urgent. |
| Operator Overriding |
Lists objects that are currently in an operator override state. Investigate and release the override if it is no longer needed to allow Metasys to automate control of that object. Beginning with Metasys 7.0, the Temporary Operator Override feature was added to prevent objects from remaining in an override state for a long time. |
| Comfort and Health | |
| AHU DA-T Variation from Setpoint |
Analyzes the Discharge Air Temperature object value for a trended period of 24 hours, and then calculates an average deviation from setpoint for each Air Handling Unit (AHU). If the calculated average deviation from setpoint is greater than the user-specified deviation limit, the equipment rule generates a notification. Absolute value of Discharge Air Temp minus the Discharge Air Temp Setpoint is greater than the value set in the preferences. |
| AHU-DAP-SP Variation from Setpoint |
Analyzes the Duct Static Pressure object value for a trended period of 24 hours, and then calculates an average deviation from the setpoint for each Air Handling Unit (AHU). If the calculated average deviation from the setpoint is greater than user specified deviation limit, the equipment rule generates a notification. Absolute value of Discharge Air Pressure minus the Discharge Air Pressure Setpoint is greater than the value set in the preferences. |
| AHU CO2 Variation from Setpoint |
Analyzes the CO2 sensor object value for a trended period of 24 hours, and then calculates an average deviation from the setpoint for each Air Handling Unit (AHU). If the calculated average deviation from the setpoint is greater than user specified deviation limit, the equipment rule generates a notification. Average CO2 minus the CO2 setpoint is greater than the value in the preferences. |
| Zone Humidity Level variation | Analyzes the humidity object value for a trended period of 24 hours. |
| Zone Humidity Level variation from setpoint |
Analyzes the Zone Humidity Level object value for a trended period of 24 hours, and then calculates an average deviation from the setpoint for each zone. If the calculated average deviation from the setpoint is greater than user specified deviation limit, the equipment is flagged. You can change the initial values of 30% and 60% in Preferences. |
| Security and Standards | |
| Default Users | Identifies whether the Metasys Default user and password are being used. |
| All Admin Users | Lists the users that have administrative privileges. |
| Dormant Accounts |
Identifies users that have not logged into Metasys within the last six months. Active users have Active status. Dormant users show as Yes in the dormant account user report. If you perform a scan through ADS/ADX, PVT only shows users that are configured on ADS/ADX and their status according to the dormant account user report. If a scan is done as engine site director, users and associated configurations are shown in PVT. |
| Point Categorization | Identifies whether all points are categorized the same. As a best practice, categorize points in order to set up and receive alarms on important points. |