CHILLER SYSTEM OPTIMIZER (CSO) User Manual TABLE OF CONTENTS. Section Description Page

Transcription

1 CSO User Manual CHILLER SYSTEM OPTIMIZER (CSO) User Manual TABLE OF CONTENTS Section Description Page I. Module Installation and Licensing 2 II. Chiller Plant Operations 5 III. General Status Main Page 8 IV. Set up Chiller Reports Config 9 V. Set up Plant General Configuration 10 VI. Set up Plant Control Configuration 11 VII. Set up Chiller Activation Configuration 13 VIII. Set up Chiller Configuration 14 A. Chiller Activity Log 15 B. Set up Diagnostics Configuration 15 C. View Diagnostic Report 16 IX. Chiller Sequencing 18 X. Plant Activation 19 XI. Slot Glossary 21 XII. Miscellaneous Available Information 30 XIII. Miscellaneous Formulas 31 CSO User Manual Rev. 8/2012 Page 1 of 31

2 Chiller System Optimizer (CSO) (User Manual) The Chiller System Optimizer, CSO, application is designed to run on the Niagara AX JACE or SoftJACE platform at version or higher. It requires the installation of two (2) jar files (blxcore2.jar and blxchill.jar). I. Module Installation and Licensing 1 Add the blxcore2.jar and blxchill.jar to your local Niagara AX modules folder (typically located at c:\niagara\niagara-3.xx.xx\modules). 2 Open your WorkPlace AX software tool on your local PC and log into the platform of the JACE. Open the software manger and select both of the required jar files from step #1. Click install and then commit. 3 The jar files will be transferred to the JACE from your local PC. 4 The JACE will require a restart after the files have been committed. 5 Log into the station of the JACE. 6 From within your palette open the blxchill module. Select CSOService and drag into the Services folder under config. See Figures 1 and 2. 7 Double click on the CSOService object that was just added to the station. The licensing wizard will appear. See Figure 3. Click next. The Product Code on the following screen will be required to request a License Key. Once a valid License Key has been entered click finish. The Chiller System Optimizer screen will appear ready to be set up. See Figure 4. It is recommended to save your station at this point. 8 Only one CSO object can be installed per JACE or SoftJACE. Figure 1 Rev. 8/2012 Page 2 of 31

3 Figure 2 Rev. 8/2012 Page 3 of 31

4 Figure 3 Figure 4. Rev. 8/2012 Page 4 of 31

5 II. Chiller Plant Operations This section describes the steps of how the CSO handles Chiller and Chiller Plant (CP) Startup and Shutdown sequencing. Once the CSO module is configured with at least its minimum required data and configuration mode is exited, the CSO will check the Chiller Plant for startup criteria being met. That is, the Ambient Temperature must be above its setpoint plus deadband (if enabled), and the schedule output must be True. Chiller Plant Startup Sequence At this point, the CP sends a start request to the secondary pumps to start via the SCWP Output Link changing it from false to true. Whatever device is providing the actual Start/Stop and Status of the pump must handle this Output Link as well as provide status feedback (making it True) through the SCWP Status Input Link (if provided). Both of these are configured on the General Plant Configuration Screen. Once status is proven, the CP startup is successful and can evaluate cooling needs. If feedback fails, the CP will fail (effectively shutdown) until the failure is reset. If no feedback point is linked in, the CP delays one minute and assumes startup successful. The CP is constantly monitoring the SCWS temperature verses the SCWS Setpoint defined for the CP. Adding or Subtracting Chillers is basically done based upon deviation from defined setpoint for a defined period of time. These methods vary slightly based upon Flow Type and Subtract Methods. Formulas are described for these in Section XII of this document. When an Add or Subtract is determined by their specific formulas, an Add or Subtract Timer countdown is started. When this timer expires, the next available chiller will be added or the last chiller added will be subtracted. If the conditions change such that an add or subtract is not required, the countdown timer is cancelled. Chillers can only be added if they are available. Their availability is shown by the column on the General Status page under the Chiller Window labeled Available. This status can be changed by the user toggling the Make Available or Make Unavailable field to the right of the Available field on that same page. If a chiller is made unavailable and it is running, the CSO will attempt to shut it down. If the CP is loading the very first chiller, it will pick a Base Chiller if one exists. If no Base chiller exists, then the first Normal chiller is selected. Most systems will just use Normal chillers if they are all to be sequenced and rotated. A Peak chiller if one exists is always loaded last as a worst condition chiller. Swing chillers are started after any defined Base chiller, but are stopped when any other chiller is added. So, if no Base chiller exists, the Swing chiller is added first. Then it is stopped if any Normal chiller is added. If a Base chiller does exist, then the Swing chiller is added second. It then is shutdown when the next normal chiller is added. Then the Swing chiller would be the next chiller to add after that. The process repeats adding the Swing chiller and then shutting it down and adding the next Normal chiller each time an add chiller timer expires. Rev. 8/2012 Page 5 of 31

6 Chillers are started by the CSO changing the PCWP Control Output Boolean from False to True and setting the Current Percent Control. If a Flow Status Point is configured, CSO expects that feedback point to become True or a Failure will be generated. If no feedback is provided, the CP waits one minute and assumes flow. If feedback is proven, the Chiller Control Output will be changed from False to True to start the chiller. A Chiller Status feedback point is also available to prove the chiller has started. If feedback points are provided and status is not detected, the chiller will fail and not be allowed to restart until the failure is reset. If no feedback exists, the CP will wait one minute and assume successful start on the chiller. In Add mode, when an add timer expires, the running chillers are examined to see if they have the Unload At Start feature enabled. If so, all chillers running with that feature enabled are unloaded before starting the new chiller. After one minute the CSO starts the new chiller. After a successful add, the CSO reloads all of the unload at start chillers. When the criteria are met for subtracting a chiller, the Chiller Control output link is changed to False. Again, if there is a feedback point on the chiller, it is checked to see if the chiller actually stops. If the feedback shows that it has not stopped, the chiller is marked as failed. If there is no feedback, then one minute later the CP assumes the chiller stops. The PCWP Control output is then stopped by changing it to false. If feedback points are provided, the CSO waits specified time in minutes (which is definable on the General Plant Configuration screen) for correct status change, before declaring a failure. Rev. 8/2012 Page 6 of 31

7 Chiller Plant Shutdown Sequence When the CP is shutdown meaning the Ambient Temperature has fallen below the setpoint or the Schedule output is now false, the CP will begin by shutting down all chillers that are currently running and then the primary pumps. Shutting down the chillers is done by changing the Chiller Control output link to False and waiting on the Chiller Status feedback point to go false if one is defined. Secondly, the PCWP Control output will be made false and it will wait on the Flow Status Feedback point to go false if one exists. After all chillers are confirmed off (running chillers = 0), the CP will command the SCWP to stop by changing the Control output to false and waiting on the feedback point to be false as well (if one exists). If the CP has a failure or any chiller has failed, the SCWP will remain on. At this point, the CP is idle and shutdown is complete. Rev. 8/2012 Page 7 of 31

8 III. General Status Main Page The General Status Screen is the default screen that shows what the Chiller Plant is doing at that moment in time after configuration is complete. It shows basic information and set points in the top window and basic chiller information in the bottom window. This is the same screen seen at system setup, but dynamically shows live information when the Chiller Plant is operational. Figure 5 shows an example chiller plant. Figure 5 Rev. 8/2012 Page 8 of 31

9 IV. Set up Chiller Reports Config. The Reports Config Set-up button allows the user to set up general information on the user s site. This information is not required to run the CSO effectively, but is used to customize the CSO reports that can be exported, ed and saved. Once the user presses the Reports Config button on the CSO General Status Screen, the Chiller Reports Config page is displayed. See Figure 6. The labels in red are required before saving. After entering or changing data on this page, press Save. Figure 6 Rev. 8/2012 Page 9 of 31

10 V. Set up Plant General Configuration The Plant General Configuration Screen is where the basic information on the Chiller Plant is entered. See Figure 7. The basics are set up here on the system including: Flow Type, linking to the Secondary Pump control input and output, and schedule. All fields in with red backgrounds are required. Input Links on the configuration page are linked to the out values of control points whereas Output Links are the inputs (such as in16) of the control points. Pressing Save at the bottom of the screen will make these connections. For more details on each field, reference the Section XI - Slot Glossary. Reference Section XIII for Constant Flow Setpoint Calculation formula. Note: To set up equipment rotation via schedule, link a trigger schedule to the ChillerPlant s ForceRotation action. Figure 7 Rev. 8/2012 Page 10 of 31

11 VI. Set up Plant Control Configuration The Plant Control Configuration Screen is where special operational modes of the CSO are enabled and configured. This includes Ambient Lockout Settings, Power Fail Recovery and Startup Settings. See Figure 9. For more details on each field, reference the Section XI - Slot Glossary. Reference Section XIII for Subtract Bypass Flow Method Calculation Formulas. Ambient Lockout is used to protect the chiller from starting at too low of an outside air temperature or to save energy by not enabling it until it is warm. If enabled, the Chiller Plant will shutdown once the ambient lockout temperature is reached. The Chiller Plant will be restarted when the ambient temperature is above the setpoint plus the deadband. Startup Settings are used to set delays before a chiller can be added for normal and soft start modes. Once a start timer begins, after a chiller is started successfully, no other adds or subtracts can be made until the timer expires. This is done to allow the chiller plant temperatures to stabilize before adding or subtracting chillers needlessly. Soft Start mode will be used if it is enabled and SCWS Temperature is above the SCWS Setpoint + Soft Start Deadband. Soft Start ends when the SCWS is less than the SCWS Setpoint + Soft Start Deadband. Figure 8 depicts how this mode is enabled and disabled. All chillers are started at the Soft Start Current Percent in Soft Start mode. In Soft Start, the SCWR temperature must be cooling greater than this rate (deg per minute), or else an add timer is started. If the Min rate is -1 and the SCWR temperature is only changing -0.5 degrees per minute, a start timer will begin. However, if the SCWR temp cooling rate suddenly jumps to -2 degrees per minute, we will cancel that add timer. This temp is measured once a minute during soft start mode. It s also noteworthy that when a unit is added, it is added at the soft start current percent and the previous chiller is set to the normal current percent. Power Failure Recovery mode is used to bring the chillers back online in the state they were in before the power failure ASAP. If enabled, it determines the kind of process the CSO performs to get the Chiller Plant back under known control after the CSO determines that a power outage has occurred to the JACE or the building. If enabled, Power Failure Recover Mode is used when the SCWS Temperature is less than SCWS Setpoint plus the deadband and the power has been out for less than the defined PF Recovery Time Limit. Rev. 8/2012 Page 11 of 31

12 Figure 8 Figure 9 Rev. 8/2012 Page 12 of 31

13 VII. Set up Chiller Activation Configuration The Chiller Activation Configuration Screen is where the Chiller Add Settings and Chiller Subtract Settings are configured for the system. See Figure 10. For more details on each field, reference the Section XI - Slot Glossary. An Add Timer is started whenever the SCWS Temperature is greater than the SCWS Setpoint plus the deadband. A chiller is not added until the add timer expires and the demand for an added chiller still exists. Add timers are also started if the Add Input is linked and goes true. Add timers cannot be started if there is an active start timer. There are two different Subtract modes available. These are Delta-T and Bypass Flow. Under Delta-T method, the actual Delta-T must be below the Subtract Delta-T a subtract timer to start. For Bypass Flow, the bypass flow must be greater than a calculated subtract bypass flow. A Subtract timer is also started if the Subtract Input is linked and goes true and no other subtract or add timer is already active. Subtract timers cannot be started if there is an active Add or start timer. Figure 10 Rev. 8/2012 Page 13 of 31

14 VIII. Set up Chiller Configuration The Chiller Configuration Screen is where the information of each Chiller is entered one at a time. The user is first prompted for a Chiller Name when entering this page via the Add Chiller button found on the General Status Screen. After defining the chiller the first time, changes are made by selecting the desired chiller in the lower window from the list of chillers defined. The Chiller Configuration Screen for that selected chiller will be displayed. See Figure 11. Most fields on this screen are disabled and cannot be edited if the chiller is running. All fields in red backgrounds are required. For more details on each field, reference the Section XI - Slot Glossary. The user can expand the tree view under the CSOService to see the objects for each defined chiller. Note: Renaming or deleting chillers must be done with caution. If the user needs to delete a chiller from the plant or change the name of a chiller, this must be done only during configuration set up or when the Chiller Plant is not running. Figure 11 Rev. 8/2012 Page 14 of 31

15 A. Chiller Activity Log Each Chiller Configuration page has a sub-page for Chiller Activity Log. Selecting this option displays the activity for that chiller in a scrolling diagnostic window of up to the last 25 actions of the chiller. B. Set up Diagnostics Configuration Each Chiller Configuration page has a sub-page for Diagnostics Configuration. This section allows you to choose to export diagnostic reports upon the event of a chiller failure via or exported file. If is chosen, a list of up to five recipients can be configured. If file is chosen, the file location and name can be configured. See Figure 12. Note: If using , a Niagara Service and Outgoing Account must be configured up in the station before entering data on this configuration screen. Figure 12 Rev. 8/2012 Page 15 of 31

16 C. View Diagnostic Report At the Diagnostics Configuration level for each chiller (see Section B previous), the user can also run a current diagnostic report by selecting the option at the top of the screen. This gives a snapshot on the chiller at that moment in time in a nice report customized for that specific chiller type. In order for any diagnostic data to be collected for each chiller, a manual Link/Mark process needs to be performed on each. This is done by finding the live chiller I/O module such as an LCI-C Lon Card device under the LonWorks Network in the station for example. The data under the points folder here are the Link Mark points. Then the points are matched to the appropriate properties on the Data object for the chiller in question under the CSOService one point at a time. See figure 13 for example. Link in all the points from the live chiller controller that are relative to the chiller that is being set up to this property sheet. Be sure that the correct Chiller Type is selected from the dropdown box on the Chiller Configuration Screen. Warning: Changing the Chiller Type selection after linking these points up will delete all links! Figure 13 Rev. 8/2012 Page 16 of 31

17 Figure 14 shows the header area of a chiller report that is generated via the View Diagnostic Report button. This is the same report that is ed or saved on the disk when a failure occurs if those features are enabled. Exported and ed files are in PDF format. Figure 14 Rev. 8/2012 Page 17 of 31

18 IX. Chiller Sequencing The Chiller Sequencing Set up screen allows for the user to define the order Normal Chillers are sequenced based upon a fixed rotation method. Base, Peak, and Swing chillers don t appear on this screen since they are never rotated. The user can move Sequenced and Unsequenced chillers between the two windows to achieve the order in which the normal chillers will be staged on and off. Figure 15 shows C1 and C2 as the chillers in a rotation sequence for this Chiller Plant. Sequenced chillers are chillers that are controlled by CSO. The order of the sequenced list is the order that the normal chillers are activated from top to bottom. Unsequenced chillers are not controlled by the CSO. Any unavailable chillers or chillers with required fields not defined cannot be sequenced. Figure 15 Rev. 8/2012 Page 18 of 31

19 X. Plant Activation The Plant Activation button provides the user with general running information on the Chiller Plant including System Status (with diagnostic messages), Add and Subtract information, as well as Failure and Rotation Information. An example of this is shown in Figure 16. In the System Status window, the Start Timer Countdown counts down to zero in five second increments. Once as zero, it will stay at zero unless the Chiller Plant is restarted. The start timer will be started and will count down to zero after each successful add. In the Add Information and Subtract Information windows, the timers also count down in five second increments until they reach zero where the value will stay until the next add or subtract requirement is determined and the timer is restarted. If any timer is cancelled, it will immediately be reset to zero. A Force Add and Force Subtract button is also located on this information page. These allow the users to bypass the add/subtract timers and force an immediate action on the next available chiller rather than waiting on CSO to perform the action. Any timers active will be cancelled if this occurs. The Failure Information window contains information on any failed chillers. To attempt to clear the soft failure, the user can press the Reset All Failures button on the page. If successful, then the chiller is no longer failed and is available to start if conditions are correct. The Rotation Information shows the current sequence of normal chillers, and the next sequence of normal chillers that will be used when the next rotation occurs. Rev. 8/2012 Page 19 of 31

20 Figure 16 Rev. 8/2012 Page 20 of 31

21 XI. Slot Glossary Plant General Slots General Information Chiller Plant Flow Type The flow type can be Constant Flow or Variable Flow. It affects the Chilled Water Setpoint calculation and the Subtract mode logic. Design Delta T This is the Delta-T of the design of the CP in Deg F. Maximum Retries On Failure: This is the maximum number of times the chiller plant will reset all failures and attempt to restart the chiller plant after all of the chillers in the chiller plant have failed. SCWS Set Point This is the set point for the Chilled Water Supply. For a Variable Flow system it is the actual value sent out to the individual chillers for control setpoint. In Constant Flow it is the setpoint used for individual chillers only if all chillers are running. If only a portion of the chillers are running, the setpoint is calculated as a proportion and sent to the chillers based upon size. See Section XII for formula details. Sensor Response Time Minutes: This is the response time of sensor before a failure is determined. This applies to all sensors that are part of the sequence including: Chiller PCWP Status, Chiller Status, and Chiller Plant SCWP Status. Check Boxes Rotate Immediately When checked, the CP performs chiller rotations immediately upon request or schedule. When unchecked, it waits until the next time the chiller plant is started. Programmable control of chiller rotation is accomplished via linking a user defined Trigger Schedule to the Chiller Plant object s Force Rotation Action link. Fail on Bad Status: - When checked, any bad status that comes in for the chiller plant or a chiller causes the chiller plant / chiller to fail. When unchecked, the following status points are not monitored during running state and therefore do not cause the chiller plant/chiller to enter failure mode. These are: Chiller PCWP Status, Chiller Status, Chiller Comm status, and SCWP Status. Note: These statuses are monitored during chiller plant / chiller startup and shutdown and are expected to behave as previously documented. Force Sequence Change Immediately When checked, it forces a change (user changing the normal chiller sequence on the Chiller Sequencing screen) immediately. When unchecked, the sequence changes take place the next time the chiller plant starts. Rev. 8/2012 Page 21 of 31

22 Input Links SCWS Temperature This is linked to the Secondary Chilled Water Supply Temperature of the system. SWCR Temperature - This is linked to the Secondary Chilled Water Return Temperature of the system. SCWP Status This is linked to the status of the Secondary CW Pump(s) of the system. SCWP Flow This is linked to the value of the Secondary CW Flow if one exists. Bypass Flow This is the rate of water flow in the bypass of the plant and is used as the input for the bypass flow subtract method. When the bypass flow is greater the calculated bypass flow subtract threshold, a subtract is performed. Operation Schedule: This is linked to a Boolean schedule for on/off of Chiller Plant operation. When True, CP is enabled. Output Links SCWP Control This is linked to the Secondary CW Pump control logic. This is Boolean where True means pump on. Diagnostic Links Automated Diagnostic Schedule Allows for the definition of a schedule at which diagnostics are collected via an . Automated Diagnostics Export Schedule: This is the schedule that controls when the diagnostics report is generated and saved to a file on the JACE/SoftJACE, overwriting the last saved diagnostic report on file. Outgoing Account - Selects the outgoing account that is already setup in the Niagara Service in the station. It is used to send diagnostic ed reports. Rev. 8/2012 Page 22 of 31

23 Plant Control Slots Ambient Lockout Settings Ambient Lockout Enabled T/F field to Enable Ambient Lockout Ambient Lockout Temperature Ambient temperature in Deg F at or below which the Chiller Plant enters Ambient Lockout mode and is shut down. Ambient Lockout Deadband This is the number of degrees above the ambient lockout temperature at which the plant will be able to exit the ambient lockout state and restart. Ambient Temperature Input Linked to Temperature Sensor for Ambient Lockout. Startup Settings Start Timer Duration In Normal Operation, this is the amount of time after an ADD has occurred, that the system will refuse to consider another add or subtract. Soft Start Enabled T/F field to allow a Chiller Plant Soft Start Soft Start Timer Duration Under Soft Start Operation, this is the amount of time after an ADD has occurred, that the system will refuse to consider another add or subtract. Soft Start Deadband: If the SCWS temperature is above the SCWS Setpoint plus the deadband when the Chiller Plant starts, the CSO will start using the Soft Start method. Soft Start Minimum Cooling Rate This is the rate that the system must be cooling the SCWR Temperature during a Soft Start. Its range is 0 to -50 (negative 50) Deg F. Power Failure Settings (brings all chillers on together that were running before) Power Failure Recovery Mode Enabled T/F Field to enable Power Recovery feature. Power Failure Recovery Temperature Deadband If the SCWS temperature is below the setpoint plus the deadband, a Power Failure Recovery will be used. Otherwise a Normal start is performed. (Both this criteria and the Time Limit criteria need to be met before power failure recovery is entered.) Power Failure Recovery Time Limit If the power is out for longer than this time (in minutes), then the system will perform a normal startup instead. Rev. 8/2012 Page 23 of 31

24 Chiller Activation Configuration Slots Chiller Add Settings Add Timer Duration - Number of minutes of sustained positive add criteria before a chiller add can occur. Add Temperature Deadband Amount above Setpoint in Deg F the SCWS Temperature must be before an Add Timer is started. Add Input - This is a Boolean point when True enables an Add. This is done via some AX programming of points. When this value is True and no Add Timer is active, an Add Timer will start. Chiller Subtract Settings Subtract Timer Duration Number of minutes before a chiller subtract can occur if the Actual Delta-T is less than the Subtract Delta-T. Chiller Subtract Method: There are two methods. These are Delta-T and Bypass Flow. Subtract Temperature Deadband This is a user configurable adjustment to the calculated subtract delta-t See Section XII for specific formula. Subtract Excess Flow Percentage This is a user configurable adjustment to the calculated subtract bypass flow. See Section XII for specific formula. Subtract Input - This is a Boolean point when True enables a Subtract. This is done via some AX programming of points. When this value is True and no Subtract Timer is active, a Subtract Timer will start. Rev. 8/2012 Page 24 of 31

25 Chiller Configuration Slots General Chiller Rotation Type From the drop down box, select from the following types: Base, Swing, Normal, and Peak. o Base Select Base for the chiller if it is the first chiller you want to start. o Peak Select Peak for your last chiller you d want to ever start. This is usually a chiller that is most expensive to run or used primarily as a backup chiller. o Normal Select Normal if you want the CSO to allow the chiller to be part of a rotation schedule. Most chillers will be selected as Normal. o Swing Select Swing if you want this chiller to start first (but after any base chiller). If there is a need for additional chiller(s), the Swing chiller is stopped and the next available Normal chiller is started. Chiller Type This field is not used to run CSO, but rather sets the variable list for diagnostic reporting of that chiller type. The user needs to manually link in the diagnostic points for the report to read. Be forewarned that changing this type after linking in each variable will reset all links that were there prior and linking will need to be done again. See Section VI.C. View Diagnostic Report for linking description. Serial Number Used for the diagnostic reports, this is the Serial Number of the chiller. Model Number Used for the diagnostic reports, this is the Model Number of the chiller. Design Cooling Capacity Enter the number of Tons of the chiller being defined. Design Flow This is the GPM value for the Design Flow of this chiller. Minimum Chiller Water Set Point - Minimum you d ever want the chiller s chilled water set point to be in a constant flow system in Deg. F. Normal Current Percent This is the Current limit (percent of capacity) for the chiller from 0-125%. Soft Start Current Percent This is the Current Limit to use at the start of a Soft Start of the CSO from 0-125%. Generally this would be 50%. Unload At Start This is a checkbox. When checked means the CSO takes Current Load of this chiller down to the Unload at Start Percent while adding another chiller (one minute wait is performed after unloading this chiller before performing the add). This Chiller s Current Load remains there until the add is confirmed as added. Once an add has been confirmed, this chiller is reloaded to the Normal Current Percent. Unload At Start Current Percent This is the load value the chiller goes to when another chiller is added until confirmed if the Unload At Start checkbox is checked. Rev. 8/2012 Page 25 of 31

26 Input Links Chiller Failure Input 1 This is a T/F field (true indicating failure) where the user can tie in a Boolean Point that has some custom programming tied to it to indicate that chiller has failed. Chiller Failure Input 2 Same as Input 1. Output Temperature This reference is linked to the output/leaving temperature of the chiller. Flow Status Input This reference is linked to the output of the Primary Pump Status if one is available. This is a Boolean point that when true means the pump is running. This point is expected to go from False to True when the PCWP Control point is set to True. Flow Rate Input This is a Numeric reference that is linked to the flow meter of the chiller if one is available. Status Input This reference is linked to the Chiller Status field. It is a Boolean point that is True when chiller status is proven. This point is expected to go from False to True when the Chiller Control output point is set to True and Chiller Status is proven. Communications Status Input This variable is for future use. Output Links PCWP Control This reference is linked to the control point for the primary pump on the chiller. True enables the pump. Chiller Control This reference is linked to the Chiller start/stop point. True enables the chiller. Current Percent Output This Numeric point is linked to the Chiller Current Limit Setpoint. Chiller Water Setpoint Output This Numeric point is linked to the Chiller Chilled Water Setpoint. Rev. 8/2012 Page 26 of 31

27 Diagnostics Configuration Slots Diagnostics on Failure? This is a checkbox that when checked will a diagnostics report whenever there is a failure detected on the chiller. This option requires the Niagara station to have Service and an Outgoing Account already set up. Export Diagnostics PDF File On Failure This is a checkbox that, when checked, saves the diagnostics report as a PDF on the station whenever a chiller failure occurs. Recipient 1 thru 5 This is a valid address where a diagnostic report is sent when conditions dictate. Subject This is the subject header for the that contains the report. Body This is the body of the that contains the report. Export Folder This is a folder on the JACE that the diagnostic report is to be stored. Take caution as this must be in Tridium file ord format. Export File Name This is the name of the file the diagnostic report is to be written to. Only one file will be kept: Older versions are overwritten. Rev. 8/2012 Page 27 of 31

28 General Status Slots The top window shows a dynamic view of the critical setup and active data concerning the selected Chiller Plant. The following table lists the data and definitions for each field in the window. These are broken into three columns. First Column Current State These are: Startup, Idle, Soft Start, Shutdown, Ambient Lockout, Running, and Power Fail Recovery Plant Failure Detected This is a True/False field indicating if a CP Failure exists. Chiller Failure Detected This is a True/False field indicating if any chiller failure exists. Ambient Lockout This is a True/False field indicating if Ambient Lockout Mode is enabled. Ambient Lockout Temperature If Ambient Lockout is enabled, this is the temperature at or below which it occurs. Ambient Temperature This shows the current value of the Ambient Temperature sensor that the CP is linked. Power Failure Recovery Enabled This is a True/False field indicating if the CSO will perform a Recovery if the system running the CSO detects a power outage restoration. Soft Start Enabled This is a True/False field indicating if Soft Start is enabled. Second Column SCWS Setpoint This is the desired setpoint for the secondary chilled water supply of the system. SCWS Temperature This is linked to the Secondary Chilled Water Supply Temperature. SCWR Temperature - This is linked to the Secondary Chilled Water Return Temperature. SCWP Flow If one exists, this is linked to the flow meter of the Secondary loop in gpm. Bypass Flow If one exists, this is linked to the flow meter of the bypass loop in gpm. This is required if using bypass flow subtract method. Design Delta T This is the value of the Delta T of the system design in degrees F. Actual Delta T This is the current calculated value of the Delta T in degrees F. Subtract Delta T This is the actual delta-t value that the system needs to be at in order to perform a delta-t based subtract. Rev. 8/2012 Page 28 of 31

29 Third Column SCWP Status This is the status of the secondary pump(s) feedback. SCWP Control This is the desired state of the secondary pump(s) of the system. Available Chiller Capacity This is the total number of tonnage of chillers not yet running. Running Chiller Capacity This is the total number of tons of chillers currently running. Total Chiller Capacity This is the total tonnage of all chillers defined in the system. Available Chillers Number of chillers that are available to run. Running Chillers Number of current active running chillers. Total Chillers Number of total chillers in the system (available plus running). The bottom window shows a dynamic view of each chiller defined for the Chiller Plant. The following table lists the data and definitions for each field in the window. Each defined chiller is listed vertically down the window and its respective data horizontally across the page. Chiller Chiller Tag ID PCWP Control Status of Primary Chilled Water Pump Output point Flow Status Status of Primary Chilled Water Pump Chiller Control Status of Chiller Enable Output point Chiller Status Feedback point of Chiller Input Temperature Linked to Entering Chiller Temperature Output Temperature Linked to Leaving Chiller Temperature Rotation Type Rotation Type of chiller (Values are Normal, Base, Swing and Peak) Failed Status Indicates whether or not the Chiller has failed. Set Point Chilled Water Supply Temperature setpoint of that chiller. Current % Control Current chiller RLA output. Available Indicates that the chiller is available to run. Make Available Toggles chiller from Available to Unavailable and back again. Once a chiller is made Unavailable, the chiller is shut down and is no longer activated at part of the sequence. Rev. 8/2012 Page 29 of 31

30 XII. Miscellaneous Available Information This section lists some available properties of the CSO that are available to possibly use with an Integrator s special Wire Sheet coding. These allow for detecting if there are failures, enabling the Chiller Plant upon a user written trigger, detecting whether or not a chiller is available, and delaying CSO activation upon startup. Figure 17 shows a table of properties that are available for this purpose along with the Component the property is located and it s Type. Below the table are the slot definitions. Points in blue are properties that have no other user interface. Component Property Type ChillerPlant ChillerPlantFailedStatus BStatusBoolean ChillerPlant FailureDetected BStatusBoolean Chiller ChillerFailedStatus BStatusBoolean Chiller AvailableStatus BStatusBoolean ChillerPlant AlwaysEnabled BStatusBoolean ChillerPlant SystemStartupTimerDuration BStatusBoolean Figure 17 Slot Definitions ChillerPlantFailedStatus When True, the Chiller Plant has Failed. FailureDetected When True, one or more Chillers has Failed. ChillerFailedStatus When True, this specific Chiller has Failed. AvailableStatus When True, this specific Chiller is Available. AlwaysEnabled When True, the Chiller Plant is always enabled and the Occupancy Schedule is ignored. Ambient Lockout will still occur if it is enabled. SystemStartupTimerDuration When set to any value other than zero, this is the time the CSO will wait (on JACE startup) before taking control of the Chiller Plant allowing for sensor points that may not yet be initialized and reported back. Rev. 8/2012 Page 30 of 31

31 XIII. Miscellaneous Formulas Chilled Water Set Point Constant Flow Chilled Water Set Point = (SCWPSP ( SCWRT * ( 1 - %Enabled ))) / %Enabled Where: SCWPSP = Secondary Chilled Water Supply Set Point SCWRT = Secondary Chilled Water Return Temperature %Enabled = Percentage of total capacity that is enabled or Running Capacity / Total Capacity Variable Flow Chiller Water Set Point = SCWPSP Subtract Delta-T Constant Flow Subtract Delta-T = ( ( DDT * (EC SC) ) / TC ) - STDB Where: DDT = Chiller Plant Design Delta T SC = Subtract Capacity (the capacity that is being subtracted) EC = Enabled Capacity (the capacity that is currently online and running in the plant) TC = Total Cooling Capacity (the enabled capacity + the available capacity) STBD = Subtract Temperature Dead Band Variable Flow Subtract Delta-T = ( DDT * ( 1- SC / EC ) ) STDB Where: DDT = Chiller Plant Design Delta T SC = Subtract Capacity (the capacity that is being subtracted) EC = Enabled Capacity (the capacity that is currently online and running in the plant) STBD = Subtract Temperature Dead Band Subtract Bypass Flow Constant / Variable Flow Subtract Flow = CSF * ( 1 + ( EFP / 100 ) ) Where: CSF = Chiller to Subtract Flow (the design flow of the chiller that is to be subtracted) EFP = Excess Flow Percentage Rev. 8/2012 Page 31 of 31