Tracker BMTK version 12 and CCPIII Occupancy Schedule, Exceptions, and Override

Issue:

Tracker BMTK version 12 and CCPIII Occupancy Schedule, Exceptions, and Override

Resolution:

 

 

Tracker v12 BMTK and CCP III Occupancy Schedule

 

These topics are covered: Schedule Setup, Exception schedule, Occupancy priority, Number of schedules, Schedule members, Override schedules, Daylight Savings Time, CCP schedules, CCP Occupancy Binary Input.

 

Introduction: The Tracker system is capable of using different space temperature set-points and different methods of temperature/comfort control depending on the occupancy state. Setpoints may be relaxed during unoccupied periods (night setback) to save energy. Control strategies such as morning warm-up, daytime warm-up, use of economizing, and ventilation requirements may be changed as well. Time of Day Schedules are used to determine the occupancy state for the various components of the HVAC system, and therefore indirectly, the type and level of space temperature control. In the Tracker system there are five possible levels of control for occupancy: Tracker schedules, CCP schedules, a binary input on CCP panels that can be used for hard wired occupancy inputs to a CCP, for SCC devices stand-alone operation (always occupied), and over-rides.

 

Occupancy priority:  The default is Occupied if there are no schedule stop times. priority is Override > Tracker schedule > CCP schedule > CCP Occupancy Binary Input. When communication is lost devices operate in the stand-alone mode and are occupied by default.

 

Number of schedules: A total of ten schedules can be set up in Tracker. Up to two sets of start/stop times are allowed per day. Schedules are weekly, not annual. If exceptions (explained below) are needed for holidays they must be set up individually. There are four schedules available in a CCP.

 

Schedule members: Constant volume RTUs that are communicating directly to Tracker with an LCI interface, CCP groups (of VAVs), and SCC devices (ZN517, ZN510/511, Zn524) can all be individually assigned as members of a schedule.

 

Exception schedule: Exceptions set up periods of occupancy that may differ from the normal schedule. For example, the set of devices controlled by a schedule could have different periods of occupancy on a holiday. Exceptions are set up for particular dates and the occupancy periods for the exception supersede those for normal schedule on that day of the week. Since the normal schedules repeat weekly, not annually, and exceptions pertain to particular dates, and since holidays do not often fall on the same date or same day of the week year to year, exceptions will ordinarily need to be deleted and redone every year. There is a check box that cancels the exception automatically after it is executed.

 

Schedule Setup: Tracker schedules can be set up either at the operator display or using the Tracker PC software. CCP schedules are set up either at the operator display or from the Varitrac PC software (see below).

From the PC software: select the Schedules Icon from the menu bar. In the Selection List window the options are Delete, New, Edit. Selecting New or Edit displays the Schedule Editor window with three tabs for Time Setup, Member Setup, and Exceptions. The Time Setup tab is used to name the schedule and setup the first and second start/stop times for each day of the week. Note that the start/stop times pertain to days of the week not specific dates. The Member Setup tab is used to add or remove schedule elements from the schedule. The Exceptions tab is used to create and name an exception, to determine up to two start/stop times, and to define the dates for which the exception schedule will apply.

From the Operator Display: Touch the Schedules Button. This will display three buttons that correspond to the tabs above, Time Setup, Member Setup, and Exceptions. The format differs but the functionality is the same.

 

Override schedules: Overrides can be initiated from the operator display, through the PC software, or with the TOV button on zone sensors. Occupancy can be overridden for either individual devices or for entire schedules. The override time can be edited to from 15 min to 4 hrs. Reports of override usage are available for billing purposes.

From the PC software: Individual override/cancel events can be initiated by selecting the After Hours icon from the menu bar. Selecting one of two radio buttons allows override of either entire schedules or individual devices. This selection will apply only to this particular override event. The After Hours window displays the type, name, and status, for either schedules or all the individual devices. Selecting a member from the list enables the Start Override and Cancel Override buttons. The override time can be edited to from 15 min to 4 hrs. Editing the override time here allows different override events to be overridden for different periods.

From the Operator Display: Individual override/cancel events can be also be initiated by touching the After Hours button. This will display buttons that correspond to the functions above, but the functionality is not identical to the PC software. Overrides are for the default period as edited in Panel Setup in the PC software. Individual devices, areas, or entire schedules can be overridden by touching the appropriate button.

From the TOV button on a zone sensor: Pressing the TOV button on a zone sensor initiates override either for that individual device or for the entire schedule. From the operator display selecting whether overrides apply to schedules or individual devices is done through Advanced/Tracker Setup. The General tab of the Panel Setup window (click the tracker name at the base of the device tree or select Panel Setup from the Setup main pull-down menu) in the PC software allows enable/disable of zone sensor TOV as well as the default override period and whether overrides will affect individual devices or entire schedules. The default override time can be edited to from 15 min to 4 hrs. The default override time edited in Panel Setup of the PC software is used for zone sensor TOV. Pressing the TOV button on a zone sensor initiates on override for all the members of a CCP group. 

 

Daylight Savings Time: The Tracker clock can be enabled to account for changes in daylight savings time. This feature is enabled by selecting the Time Date tab of Panel Setup from the main pull-down menu of the Tracker PC software(click on the Tracker at the base of the tree, then the time date tab).Daylight saving time start and stop dates are editable. If enabled, schedules will then also reflect the change to daylight savings time and back to standard time.  The CCP clock does not have this feature.  It is also possible to enable this feature from the operator display. The sequence is: Advance/Tracker Setup/page 2. Select Daylight Savings Time, then can select Disable/Enable. 

 

CCP schedules: Schedules set up at the CCP panel have lower priority than Tracker schedules so they will not be used if a Tracker schedule is present. The CCP clock is on the operator display so CCP schedules can not work when there is no operator display on the CCP. The units of control are the (up to four) CCP groups in that CCP. Up to four schedules are possible but a schedule can contain more than one group. Schedules can be set up either from the operator display or with the Varitrac PC software. In the PC software select the Schedules icon from the main menu bar. There are two tabs in the Schedule Editor that will be displayed. Time setup is used to name the schedule and to set up to two start/stop times per day. The schedule is weekly Mon.  Sun. No exception schedules are allowed. The Member Setup tab is used to add or remove groups from the schedule. Similar functionality is available with the Schedule button on the operator display.  The CCP schedule does not follow daylight saving time. 

 

CCP Occupancy Binary Input: There is a normally open (occupied) dry contact on the back plate termination board of the CCP. This input has the lowest priority for occupancy.  If the CCP has a schedule the BIP will not work.  If there is a Tracker schedule the BIP will not work.

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Notes:

 

Changes:

 

Other Question/Problem/Cause Statements:

• Tracker schedule setup
• CCP schedule setup
• Occupancy schedule priority
• How many schedules in Tracker
• What can be scheduled in Tracker
• Exception schedule in Tracker
• Schedule override in Tracker
• TOV in Tracker
• CCP binary occupancy input
• Daylight saving time for tracker schedule
• Tracker schedule
• CCP schedule
• How many time of day schedules can I put in one Tracker?
• How many exception schedules can I put in the Tracker?
• How does the CCP III arbitrate Occupancy?
• What is the priority, Tracker schedule or Internal CCP III schedule or the Occupancy input? 
• Why won't the CCP III follow the Occupancy BIP?
• Can I use a BIP to control occupancy of a CCP without Tracker?
• can groups be schedule members
• Time clock binary input on CCP does not work
• How to set up Tracker to run 24 hours a day 7 days a week.

Facts:

• Tracker BMTK
• VariTrac III Central Control Panel (CCP)
• TRACKER BMTK
• VARITRAC III CENTRAL CONTROL PANEL (CCP)

Original wave: wave8834