Controller Operator Guide VariTrac TM Central Control Panel VAV-SVU01A-EN
VariTrac Central Control Panel Operation Guide This guide and the information in it are the property of American Standard Inc. and shall not be used or reproduced in whole or in part, except as intended, without the written permission of American Standard Inc. Since Trane has a policy of continuous product improvement, it reserves the right to change design and specification without notice. Use of the software contained in this package is provided under a software license agreement.
Contents Chapter 1 About This Guide .................................................. 1 VariTrac CCP Naming Conventions ............................................................... 1 Cautionary Statements .................................................................................. 2 Related Literature ........................................................................................... 2 Chapter 2 VariTrac History ....................................................
Table of Contents Chapter 6 Sequence of Operation ....................................... 11 Central Control Panel ................................................................................... 11 CCP Start-up ........................................................................................... 11 Bypass System Calibration ................................................................... 11 Static Pressure Bypass ..........................................................................
Chapter 6 cont’d Unit Control Module (UCM) ......................................................................... 23 UCM Start-Up ......................................................................................... 23 Setpoints ................................................................................................ 24 Parameters ............................................................................................. 25 Damper Control ....................................................
Table of Contents Chapter 7 Delivered VAV Operation .................................... 35 What “Delivered VAV” Is .............................................................................. 35 What “Delivered VAV” Is Not ....................................................................... 35 System Operating Overview ........................................................................ 36 Zone Count .............................................................................................
Chapter 8 Data Display Screens ................................................................................... 46 cont’d Data Entry Screens ....................................................................................... 46 Analog Data Entry Screen ..................................................................... 47 Alphanumeric Data Entry Screen .......................................................... 48 Confirmation Screens ..............................................................
Table of Contents Chapter 9 Advanced Functions ........................................... 75 CCP Setup and Service ................................................................................. 75 CCP Setup ............................................................................................... 75 Set the Current Time ....................................................................... 76 Set the Current Date .......................................................................
Chapter 9 cont’d Zone Setup and Status ................................................................................. 96 Zone Setup ............................................................................................. 96 Zone Name ...................................................................................... 97 Heat/Cool Vote ................................................................................. 97 Use Local Setpoint ............................................................
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Chapter 1 About This Guide This manual describes the steps required to properly set up and operate VariTrac changeover-bypass variable air volume (VAV) systems, delivered VAV systems, and the VariTrac central control panel (CCP). The information in this guide includes: VariTrac History. A brief overview of the VariTrac product history. Feature Summary. A summary of the new features and enhancements of VariTrac (3). Software Change History.
About This Guide Cautionary Statements The following cautionary statements signal procedures or conditions that require particular attention. Personal safety and the proper operation of the system depend upon the strict observance of these precautions. WARNING Indicates a potentially hazardous situation, which, if not avoided, could result in serious injury or death. CAUTION Indicates a potentially hazardous situation, which, if not avoided, may result in minor or moderate injury.
Chapter 2 VariTrac History With the introduction of VariTrac in 1989, Trane brought their expertise in variable air volume (VAV) controls into the changeover-bypass zoning market. The concept of changeover-bypass zoning brings the flexibility and comfort of VAV systems into the light commercial unitary market, at an affordable price. The first generation of VariTrac was a 16-zone pressure dependent system.
VariTrac History 4 VAV-SVU01A-EN
Chapter 3 Feature Summary New Features CCP with three-piece enclosure design and optional operator display Quick snap-in optional relay board with easy-to-wire terminal strip Communicating sensor assembly including a UCM 4 with integral temperature and pressure sensor, and output to the bypass damper(s) Bypass damper with factory-installed wiring harness for plug-in connection to the communicating sensor assembly Zone dampers with UCM 4 boards and: – Zone occupancy sensor input – Zone (carbon d
Feature Summary Functional Enhancements Increased Zone Count The new VariTrac system now supports 24 zones instead of 16. The zones may be VariTrac dampers, or any type of VariTrane VAV box including fan-powered boxes or boxes with factory-installed local heat. Discharge Air Control VariTrac now does discharge air control.
Chapter 4 Software Change History New software versions add capabilities and improve existing operation. Each new software version includes the features of previous versions. Only the latest software version is shipped in new VariTrac CCP units. Existing units may contain a previous version. The following information states the history of VariTrac CCP embedded software version changes: Version 4.0.284. Pre-release version of VariTrac (3) central control panel. Version 4.0.290.
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Chapter 5 General Information The VariTrac comfort control system brings individual temperature control to each comfort zone in a building while using the same single-zone airconditioning unit. VariTrac varies the flow of supply air to each zone, providing the heating and cooling capacity required.
General Information Bypass Damper(s) The main supply-duct bypass damper(s) are modulated by the CCP via the communicating sensor–bypass control assembly to maintain consistent supply duct static pressure. Zone Damper with UCM and Zone Temperature Sensor The zone damper UCM compares the space temperature to the active setpoint to determine space requirements, and to the supply air temperature to determine available heating or cooling.
Chapter 6 Sequence of Operation Central Control Panel CCP Start-up The VariTrac CCP executes the following sequence of events on power up: 1 Reads the type of rooftop and automatically configures the panel to control the unit. 2 Calibrates the bypass control loop. (See Bypass Control, p. 12) 3 Scans all UCMs and collects zone information. 4 Determines the system operating mode (occupied or unoccupied) and communicates it to all zones (occupied/unoccupied mode). 5 Begins normal operation.
Sequence of Operation Static Pressure Bypass The VariTrac CCP controls the bypass damper(s) using measured duct static pressure. The central control panel compares the measured static pressure to the setpoint. This setpoint is determined by taking the reference static determined during calibration, and multiplying it by the static-pressure-setpoint multiplier percent edited in CCP Setup.
Zone Voting for System Heat or Cool Each zone attached to the VariTrac CCP can “vote” for heating or cooling. A zone is eligible to vote if it: is in communication with the central control panel. has a valid zone temperature reading. is edited to be a voter in the UCM setup. is not tagged by the central control panel. (See UCM Zone Tagging below.) Each zone gets one vote. Occupied and unoccupied zones have the same voting rights.
Sequence of Operation Zone Heat/Cool Call Strength After the heat/cool mode of the zone is decided, the strength of its heating or cooling call is determined. • Cool caller. A UCM becomes a “cool caller” if it is a voting UCM and its zone temperature is more than 1°F above the active cooling setpoint. A UCM loses its cool caller status if it becomes a non-voter or if its zone temperature is less than the active cooling setpoint plus 0.5°F. • Strong cool caller.
Heat/Cool Changeover for the CCP After the heating/cooling decision is determined, the VariTrac CCP requires a minimum number of opposite calls to change over. This is an editable setup parameter with a range of 1 to 4 (factory default is 2). All current callers must be satisfied before the system is allowed to change over. A minimum time between changeovers is enforced. (The editable setup parameter has a range of 10 to 60 minutes; the factory default is 15 minutes.
Sequence of Operation Table 1: Minimum On and Off Times (in minutes) 2 Heat / 2 Cool Binary Output Min On / Min Off Heat Pump Binary Output Min On/Min Off Cool 1 3 min / 3 min Stage 1 3 min / 3 min Cool 2 3 min / 3 min Stage 2 3 min / 3 min Heat 1 3 min / 3 min Reversing Valve 4 min / 4 min Heat 2 3 min / 3 min Auxiliary Heat 2 min / 1 min After it is energized, a stage must remain on until its minimum-on time is satisfied.
Priority Shutdown Priority shutdown is initiated by: a priority shutdown command from Tracker. closing the CCP priority shutdown input. failure to detect any communicating zone UCMs. failure to detect a communicating sensor–bypass control assembly at Address 33 (changeover bypass mode only). failure of the communicating sensor–bypass control assembly discharge air temperature sensor (changeover-bypass mode only).
Sequence of Operation 2 Heat/2 Cool versus Heat Pump Operation The VariTrac CCP automatically determines if it is controlling a Reliatel/Voyager 2 heat/2 cool or heat pump unit and configures the operating parameters (such as staging and supply air setpoints). Generic units controlled with the optional relay board must be configured as 2 heat/2 cool or heat pump through the operator display or PC software. This configures the binary outputs to control in the appropriate sequence.
Unoccupied Priority Local Heat Unoccupied priority local heat allows the operator to select a different local heat function during the unoccupied mode. Although priority local heat control may be desirable for better comfort control during the occupied mode, it may be desirable for the HVAC unit to have heating priority to save energy when comfort is not as critical during the unoccupied mode. Unoccupied priority local heat is controlled via an entry in the PC software.
Sequence of Operation During unoccupied control, the CCP: • begins intermittent fan operation. During the unoccupied mode, the fan operates only on a demand for heating or cooling. This minimizes the fan operation to save energy. • changes the minimum number of strong callers for changeover to one. During the unoccupied mode, the minimum opposite strong calls for changeover goes to one so any strong caller can change the system over.
Timed Override If the timed override button on a zone sensor is pressed, all zone members of that group become occupied. The CCP operates the supply fan and handles zone voting according to occupied parameters. Zones that are members of unoccupied groups but on the same CCP, continue to control to unoccupied setpoints. The VariTrac CCP must collect the zone timed override (TOV) signals from all members in a group into a TOV signal for the group.
Sequence of Operation System Balance Mode When the system balance mode is enabled, the CCP automatically prepares the VariTrac system for balancing. When enabled, the CCP sets the following parameters: Starts the supply fan Turns off and disables all stages of heating and cooling Closes the bypass damper(s) Opens all groups of zone dampers to their maximum position The system may now be balanced manually as a single-zone system.
Global Sensor Setpoint Limit Setup If the setpoint thumbwheel on the zone sensor attached to a zone UCM is enabled, the thumbwheel becomes the active occupied setpoint. The setpoint at the thumbwheel is the active occupied cooling setpoint. The active occupied heating setpoint defaults 3°F below the cooling setpoint. Each zone UCM has a set of setpoint limits that restricts the setpoint range of the sensor knob.
Sequence of Operation Setpoints Each zone UCM has the following setpoints: Occupied cooling setpoint. This is the active cooling setpoint when the zone is in the occupied mode and the zone sensor setpoint is disabled. Occupied heating setpoint. This is the active heating setpoint when the zone is occupied and the zone sensor setpoint is disabled. Note: If the setpoint thumbwheel on the zone sensor is enabled, the thumbwheel determines the active occupied setpoint, subject to limits (see below).
• Maximum position setpoint. This is the maximum position that the damper opens to unless overridden by a drive-open command. • Cooling minimum position setpoint. This is the minimum position the damper closes to when in the cooling mode unless overridden by a drive-closed command or by initiation of the energy-saver mode. • Heating minimum setpoint. This is the minimum position the damper closes to when in the heating mode unless overridden by a drive-closed command. • Local heat minimum setpoint.
Sequence of Operation Heat/Cool Mode Decision for Zones The heat/cool control mode for the individual zones is determined by the zone damper UCM. The CCP sends the current supply air temperature to all zone UCMs approximately once every 15 seconds. The zone UCM compares the supply air temperature of the system to the individual zone temperature and zone setpoint. If the supply air temperature is: less than or equal to the zone temperature, the control action is cool.
Slow pulse width modulation. Pulse-width modulation energizes an electric heat output for some portion of a time window. The time window for slow pulse-width modulation is 3 minutes. The “on” time is based on the percentage of heat required as calculated by the control algorithm of the UCM.
Sequence of Operation When the UCM calls for local heat to operate, the damper goes to the minimum heating position as edited before the heating output is energized. If using UCM Version 4.0 or greater, a separate minimum local heating position setpoint is available. The UCM goes to this position as edited, provided the setpoint is available and enabled. If the minimum local heating position setpoint is not enabled, the normal minimum heating position is used.
Occupied/Unoccupied Mode During occupied operation, the zone controls to the zone-sensor-setpoint thumbwheel if enabled. The setpoint at the sensor is the cooling setpoint; the heating setpoint is 3°F below the cooling setpoint. This heating setpoint offset can be edited in the zone setpoint menu (range 2°F to 10°F). If the zone sensor setpoint thumbwheel is disabled or has failed, the zone will control to the programmed occupied cooling setpoints. The factory defaults are 74°F cooling and 71°F heating.
Sequence of Operation Override to Unoccupied A zone can be manually overridden from the zone sensor to go into the continuous unoccupied mode. Mechanical sensor. Rotate the setpoint thumbwheel on the zone sensor to the ** position (fully counterclockwise) and push the TOV On button. The zone goes into the continuous unoccupied mode. To release the continuous unoccupied mode override, move the setpoint thumbwheel on the zone sensor from the ** position into the normal setpoint range. Digital zone sensor.
Zone Sensor Operations The zone sensor module utilizes a 10K thermistor element to measure zone temperature. The zone sensor module has the following options: Zone temperature Zone setpoint control Timed override and cancel Zone Temperature Each zone sensor module includes a zone temperature sensor element.
Sequence of Operation Modem Interface for Remote Communications If a Tracker Version 10 panel is available and the VariTrac CCP is connected to it, the CCP can be accessed remotely via the Tracker modem using the Tracker PC software. If no Tracker is available, an external modem can be connected to the VariTrac PC port (RJ-12 style socket) for remote site communications.
Modem Operation Power the modem on. The modem is now ready for use with the VariTrac CCP. Remote connection to the modem is done using the VariTrac PC software and selecting the “remote connect” option. The software provides a setup screen to select the comm port for your PC modem, the site name, and the site phone number. Once you are remotely connected to the site, the PC software functions the same as if you were directly connected to the panel on site.
Sequence of Operation 34 VAV-SVU01A-EN
Chapter 7 Delivered VAV Operation What “Delivered” VAV Is “Delivered VAV” describes a small-tonnage VAV system made up of three Trane product families: Voyager Commercial 27½ to 50-ton VAV packaged rooftop unit Up to 32 VariTrane VAV boxes with DDC controls VariTrac central control panel with operator display Delivered VAV only applies to this combination of Trane products. The heart of the delivered VAV system is the VariTrac CCP, which must include the operator display.
Delivered VAV Operation System Operating Overview Zone Count A delivered VAV system supports up to 32 zones. The zones can be any type of VariTrane pressure-independent VAV box, including single-duct boxes, fanpowered boxes, and boxes with factory-installed local heat. Automatic Configuration and Start-up The delivered VAV system performs automatic configuration on start-up. The CCP first locates the Voyager rooftop unit on the Comm4 link and automatically configures the system as a delivered VAV system.
Supply Air Setpoint Reset The supply air temperature setpoint can be reset based on zone temperature, return air temperature, or outdoor air temperature. The reset type can be selected and enabled, and the operating parameters can be set through the operator display or PC software. During setup a reset setpoint and reset amount are provided by the operator. Reset from zone air. If the zone air temperature falls below the reset setpoint, supply air setpoint reset begins.
Delivered VAV Operation Supply Air Pressure Control The factory-installed controls in the Voyager rooftop unit are used for supply air pressure control and pressure limiting. Control is done using a variable-frequency drive or supply-fan inlet guide vanes. The setpoint and deadband for supply air pressure control are configured through the operator display or PC software. Supply Air Pressure Limiting The factory-installed controls in the Voyager rooftop unit are used for supply air pressure limiting.
CO2 -Based Demand-Controlled Ventilation The demand-controlled ventilation program resets the ventilation damper position for the Voyager unit based on the zone CO2 level.
Delivered VAV Operation Global Sensor Setpoint Limit Setup If the zone sensor setpoint thumbwheel is attached to a zone UCM is enabled, the thumbwheel setting becomes the active occupied setpoint. The setpoint at the thumbwheel is the active occupied cooling setpoint. The active occupied heating setpoint defaults 3°F below the cooling setpoint. Each zone UCM has a set of setpoint limits that restrict the setpoint range of the sensor thumbwheel.
Chapter 8 Using the Operator Display Overview The VariTrac system user interface consists of an operator display on the central control panel and a menu-driven interface program in the embedded software. The operator display is a liquid crystal display (LCD) touch screen. Figure 1. VariTrac Central Control Panel with Operator Display VariTrac Central Control Panel Operator Display The user interface enables you to set parameters and access control and system status information.
Using the Operator Display Screen Layout With the exception of the home screen, each user interface screen conforms to a standard layout (see Figure 2). Each screen contains: Title bar Selection buttons Data or data entry buttons Navigation buttons Title Bar A title bar is displayed at the top of each screen. The title bar states the purpose of the screen and/or describes the information displayed on the screen.
Figure 2.
Using the Operator Display Home Screen All VariTrac operating procedures begin at the Home screen. Function buttons enable you to select the View, Alarm, Schedule, After Hours, and Advanced functions. To select a function, press the corresponding button. Figure 3.
Operation Screens Operation screens enable you to define a request to view or change data. Operation screens include branch selection screens and editor screens. Branch Selection Screen Branch selection screens enable you to select a branch category for creating, changing, viewing, or deleting function data. Branch selection screens do not display data and do not require that data be entered. To select a branch, press the corresponding button. Figure 4.
Using the Operator Display Data Display Screens Data display screens enable you to view the results of a data request. Figure 5. Example of Data Display Screen Typical data screen showing current active system data Data Entry Screens Data entry screens enable you to enter numeric values and alpha characters.
Analog Data Entry Screen The analog data entry screen enables you to change analog data. Between the title bar and navigation buttons are numeric data entry buttons. The OK and Clear buttons display at the bottom of the screen. A decimal point button enables you to type tenths. To select a digit, the decimal point, and the minus sign, press the appropriate data entry buttons. Type the data using the format NN.N. As you type the data, it displays in the “Change to” field.
Using the Operator Display Alphanumeric Data Entry Screen The five data entry screens enable you to change alphanumeric parameters, such as names of rooms, equipment, etc. The five screens are: Numeric Uppercase letter Lowercase letter Uppercase diacritical mark (used in some non-English languages) Lowercase diacritical mark (used in some non-English languages) To select digits, symbols, and letters, press the appropriate buttons. When your entry is complete, press the OK button. Figure 7.
Confirmation Screens Confirmation screens require you to approve the execution of the requested change. The first screen component contains one or more fields that identify your selected change. The next screen component provides warning messages that caution you about the selected operation. Press Yes to execute the operation previously set up. Press No button to cancel the operation. Figure 8.
Using the Operator Display Figure 9.
View Procedures The View function allows access to setpoints, override functions, occupancy schedules, status and setup of a specific VariTrac system zone. All view functions begin at the VariTrac Home screen. Additional in-depth information can be found in the Advanced section of this manual. Determine Area Temperature 1 Press View to display building status information. Note: Use the Up or Down arrow to locate the desired area.
Using the Operator Display Adjust Area Temperature Setting 1 Press View to display building information. 2 Press the appropriate area button to display the daily operator screen for that area. (See Figure 11.) 3 Press the Up or Down arrow to display setpoints for the selected area. (See Figure 12.) 4 Press the desired setpoint to display the standard analog adjustment screen. Note: If the temperature setpoint is under thumbwheel control, the system will display a setpoint adjustment error.
Figure 12. Example of Analog Adjustment Screen 6 Press Yes to confirm the changes. The Setpoints screen for the area displays. The new setpoint displays in the appropriate button. 7 Continue editing setpoints, or press Back to return to the daily operator screen. Determine Area Occupancy 1 Press View to display building information. 2 Press the appropriate area button to display the daily operator screen for that area.
Using the Operator Display Override Area Occupancy 1 Press View to display building information. 2 Press the appropriate area button to display the daily operator screen for that area. 3 Press Override Operation. The Override Selections (Single Area) screen displays. Note: If building occupancy is under higher level control (e.g. Tracker), the system responds with timed override prevented. 4 Press Start or Restart Timed Override.
Figure 13.
Using the Operator Display Alarm Procedures The Alarm function allows you to view, update, and reset VariTrac diagnostics. All diagnostic functions begin at the home screen. Only active diagnostics are displayed in the list. The VariTrac panel does not maintain a history of diagnostics or alarms. View VariTrac Diagnostics 1 Press Alarm. The Current Diagnostics screen displays. 2 Press Update Diagnostics to refresh the screen. The Current Diagnostics screen updates. 3 Press Reset Diagnostics.
Table 2. VariTrac Priority 1 Diagnostics 1 Comp1 Disable Input/LPC Open 1 Comp2 Disable Input/LPC Open Indicates the Voyager/ReliaTel low pressure cutout control has opened due to adversely low refrigerant pressure. (See wiring diagram in service literature for individual units.) 1 Dirty Filter Indicates the Voyager/ReliaTel unit’s air filters are dirty and need to be replaced. This input is provided by an optional air pressure differential switch across the filters.
Using the Operator Display Table 3. VariTrac Priority 2 Diagnostics 2 All VAV UCMs Tagged The tagging process is enabled and all the VAV UCMs have been tagged. The unit will disable all stages of heat and cool and will continue to run the supply fan. 2 Bypass Calibration Fail Indicates the CCP failed to complete the calibration process.
Table 4. VariTrac Priority 3 Diagnostics Note: Priority 3 diagnostics will place the system in priority shutdown. Priority shutdown causes the heating, cooling, and system fan to shut down. Service is required. 3 Bypass Comm Fail The CCP cannot communicate with the communicating sensor assembly. Likely causes are the sensor assembly has not been properly installed (not on the Comm4 link, not powered, or is not addressed at 33), Comm4 link is down, or the UCM board in the sensor assembly has failed.
Using the Operator Display Figure 14.
Schedule Procedures The Schedule function allows you to name, change, and view VariTrac schedules. All schedule functions begin at the VariTrac Home screen. The schedule procedure consists of naming a schedule, creating a timetable, and then adding areas to the schedule as members. If the VariTrac system is under schedule control of an upper-level system (e.g., Tracker Version 10), it responds with the Upper Level System Control screen.
Using the Operator Display 4 Enter the desired schedule name and press OK. The Enter or Change the Text confirmation screen displays. 5 Press Yes to confirm the changes. The Schedule Specific Editor screen displays. The new name of the schedule appears in the Schedule Name field. 6 Press Home to exit this procedure. Change Daily Schedule Start and Stop Times 1 Press Schedule. 2 Press the button for the schedule you want to change. The Schedule Specific Editor screen displays.
6 Enter the desired time. Press OK. 7 Press Yes to confirm the change. The Start and Stop Time Editor screen displays the entered time. 8 Repeat Steps 5–7 to change additional start and stop times for the current day. 9 To change the schedule for another day, press Back. The Schedule Timetable Editor screen displays. Repeat Steps 4–7 above to change additional schedules. 10 To apply the schedule to Monday through Friday, press Press to Copy Timetables to Monday through Friday.
Using the Operator Display Add Member to Daily Schedule 1 Press Schedule. 2 Press the button for the schedule you want to change. The Schedule Specific Editor screen displays. The name of the selected schedule is in the Schedule Name field. 3 Press Schedule Members. The Schedule Members Editor screen displays. 4 Press Add Member. The Groups Available for Membership screen displays. (See Figure 18.) 5 Press the button for the group you want to add.
Remove Member from Daily Schedule 1 Press Schedule. 2 Press the button for the schedule that you want to change. The Schedule Specific Editor screen displays with the name of the selected schedule in the Schedule Name field. 3 Press Schedule Members and the Schedule Members Editor screen displays. 4 Press Remove Member and the Remove Schedule Member screen displays. (See Figure 19.) 5 Press the button for the group you want to remove. The Confirmation for Removing a Member screen displays.
Using the Operator Display View List of Daily Schedules and Check Occupancy 1 Press Schedule. The Schedules screen displays the list of schedules and the current occupancy state. 2 Press Home to exit this procedure. View a Daily Schedule and Schedule Members 1 Press Schedule. 2 Press Member Listings. The Member and Group Listings screen displays. 3 Press View Schedules and Their Members. The Schedule Membership Listing screen displays. (See Figure 20.) 4 Press Home to exit this procedure.
View Unscheduled Members 1 Press Schedule. 2 Press Member Listings. The Member and Group Listings screen displays. 3 Press View Unscheduled Groups. The Unscheduled Groups List screen displays. 4 Press Home to exit this procedure. Figure 21.
Using the Operator Display Figure 22.
After Hours Procedures The After Hours function allows you to initiate and cancel occupancy status overrides of areas and schedules. All After Hours functions begin at the home screen. Note: If building occupancy is under higher-level control (e.g., Tracker), the system responds with timed override prevented. Start or Restart an Area Timed Override 1 Press After Hours. The Schedule Override Selections screen displays. Figure 23.
Using the Operator Display 2 Press Override a Single Area. The Building Information: Override Areas screen displays. Figure 24. Example of Building Information: Override Areas Screen 3 Press the button for the area that you want to override. The Override Selections (Single Area) screen displays. Figure 25.
4 Press Start or Restart Timed Override. The Confirm Single Area Timed Override screen displays. (See Figure 26.) 5 Press OK. The Building Information: Override Areas screen displays. 6 To override additional areas, repeat Steps 3–5. 7 Press Home to exit this procedure. Figure 26.
Using the Operator Display Start or Restart Timed Override of a Single Schedule 1 Press After Hours. The Schedule Override Selections screen displays. 2 Press Override a Single Schedule. The Building Information: Override Areas screen displays. 3 Press the button for the schedule you want to override. The Override Selections (Single Schedule) screen displays. 4 Press Start or Restart Timed Override. The Confirm Single Schedule Timed Override screen displays. 5 Press OK.
Cancel Timed Override of a Single Schedule 1 Press After Hours. The Schedule Override Selections screen displays. 2 Press Override a Single Schedule. The Building Information: Override Schedule screen displays. 3 Press the button for the schedule that you want to override. The Override Selections (Single Schedule) screen displays. 4 Press the Cancel Timed Override button. The Confirm Cancel Timed Override screen displays. 5 Press OK. The Building Information: Override Schedule screen displays.
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Chapter 9 Advanced Functions The Advanced function allows you to perform in-depth setup and/or monitor detailed status of four subfunctions. All Advanced functions begin at the home screen. The subfunctions are: CCP Setup and Service. Allows setup and service of the actual CCP panel, including time and date. System Setup and Status. Allows setup and status of the VariTrac system, including discharge air temperature and static air pressure setpoints. Zone Setup and Status.
Advanced Functions Figure 27. Example of CCP Setup Selections Screen Set the Current Time 1 Press Current Time. The Enter a Time screen displays. 2 Enter the time. Make sure to choose AM or PM. You will see the time change on the left side as you enter it. 3 Press OK. 4 Press Yes to verify your entry. The CCP Setup Selections screen appears. Set the Current Date 1 Press Current Date. The Enter a Date screen displays. 2 Enter the correct date using DD-MMM-YYYY format.
Set the Time Format 1 Press Time Format. The Set Time Format screen displays. 2 Press AM/PM or 24 Hour. 3 Press Yes to verify your entry. The CCP Setup Selections screen appears. To Change the Units of Display 1 Press Units of Display. The Select Units of Measure screen displays. 2 Press Inch-Pound (English) or International System (SI). 3 Press Yes to verify your entry. The CCP Setup Selections screen appears.
Advanced Functions Operator Display Parameters Adjust Contrast/Backlight To adjust contrast and brightness of the operator display: 1 Press Operator Display Parameters. 2 Press Adjust Contrast/Backlight. The Brightness and Contrast screen displays. Two rows of buttons appear, one for brightness adjustment and one for contrast adjustment. 3 Press the buttons to the left to reduce contrast and brightness. Press the buttons to the right to increase contrast and brightness.
Calibrate Touch Screen To calibrate the accuracy of the touch screen buttons: 1 Press Calibrate Touch Screen. 2 The touch screen calibration function displays. 3 The screen instructs you to press the calibration target in the upper left hand corner of the screen. Press until the beeping stops (about 10 beeps). 4 The screen then instructs you to press the calibration target in the lower right hand corner of the screen. Press until the beeping stops (about 10 beeps).
Advanced Functions CCP Hardware and Software Functions To access CCP Service and Testing from the home screen: 1 Press Advanced. 2 Press CCP Setup and Service. 3 Press Service and Testing. The Service and Test Selections screen displays. (See Figure 31.) 4 Press CCP Hardware and Software. The Hardware and Software Tests screen displays. (See Figure 32.) Figure 31. Example of Service and Test Selection Screen Figure 32.
Display CCP I/O Status This screen displays the status of the Priority Shutdown and External Time Clock Inputs located on the CCP subbase. It also displays the status of the spare relay output on the optional relay board. 1 Press Display CCP I/O Status to view I/O status. The CCP I/O Status screens displays. 2 View input/output status of the CCP. 3 Press the Back arrow. The Hardware and Software Tests screen displays. Memory and Processor Tasks Rebooting the System.
Advanced Functions Figure 33. Example of Test and Diagnostics Selection Screen The buttons on the screen allow you to turn the six relays on the optional relay board on and off to verify operation. The bypass damper button will allow you to enter a position value between 0 percent and 100 percent to verify damper operation. Terminate Test Mode. When finished using the test mode function, the mode must be properly terminated. 82 1 Press Test Mode: Enabled.
System Setup and Status The System Setup and Status section of Advanced functions allows you to perform in-depth setup and monitoring of the VariTrac system and associated HVAC units. There are two parts to this section: System Setup System Status System Setup To access System Setup from the VariTrac home screen: 1 Press Advanced. 2 Press System Setup and Status. 3 Press System Setup. 4 The first System Setup screen appears. (See Figure 34.) System Setup consists of four screens.
Advanced Functions System Name Press System Name to enter a description name for the VariTrac CCP. The name can contain a maximum of 24 characters, including spaces. The default name is VariTrac CCP. (See Figure 34.) HVAC Unit Type Press HVAC Unit Type to select a unit type. The VariTrac system configures this parameter automatically on start-up, with the exception of Generic Heat Pump which must be selected manually. The default unit type is Relay Board 2H2C. (See Figure 34.
Minimum Opposite Callers Press Minimum Opposite Callers to change the minimum number of normal callers required for changeover (default 2, data entry range 1–4). The VariTrac CCP requires a minimum number of opposite calls to change over. All current mode callers must be satisfied before the system is allowed to change over. A minimum time between changeovers of 15 minutes (factory default) is enforced.
Advanced Functions Static Pressure Setpoint Multiplier Press Static Pressure Setpoint Multiplier to change the static pressure setpoint multiplier. The VariTrac CCP controls the bypass damper(s) using measured duct static pressure. The CCP compares the measured static pressure to the static pressure setpoint. (See Figure 36.
System Balance Mode In this mode, the CCP automatically prepares the VariTrac system for balancing by starting the supply fan, disabling heating and cooling, closing the bypass damper, and opening all zone dampers to their maximum position. (See Figure 37.) 1 Press Enable System Balance Mode. 2 Press Enabled. 3 Press Yes to verify your entry. The System Balance Setup screen displays. (See Figure 38.) Figure 37. Example of System Setup Screen, page 4 Figure 38.
Advanced Functions Notice that the button text has changed to Disable System Balance Mode, indicating that the balance mode is currently enabled. The system remains in the balance mode until manually disabled. Adjust Groups for Balance Mode Balance mode allows you to close groups of dampers. This shuts off a portion of the ductwork to compensate for airside diversity. 1 Press Adjust Groups for Balance Mode. The System Balancing: Group Status screen displays. (See Figure 39.
Disabling the System Balance Mode 1 Press Advanced. 2 Press System Setup and Status. 3 Press System Setup. 4 Press the Last page arrow button (double arrow). 5 Press System Balance Mode. The System Balance Setup screen displays. 6 Press Disable System Balance Mode. 7 Press Disabled. 8 Press Yes to verify your entry. The System Balance Setup screen displays. Notice that the button text has changed to Enable System Balance Mode, indicating that the balance mode has been disabled.
Advanced Functions Figure 41. Example of Global Setpoint Limits Screen with Suggested Settings When you have completed editing the setpoint limits, press Back. When you exit the Global Setpoint Limits screen, the limits broadcast automatically to all the VAV UCMs on the communications link. Calibrate Now The system calibration function calibrates the VAV UCMs and determines the static pressure operating setpoint for the system. (See Bypass Calibration, p. 11.
System Status There are five system status screens. Navigate from screen to screen using the Up and Down arrows. To access system status from the home screen: 1 Press Advanced. 2 Press System Setup and Status. 3 Press System Status. The first System Status screen displays. (See Figure 42.) Figure 42. Example of System Status Screen, page 1 System Name. Identifies this VariTrac system by name (editable) Unit Type. HVAC unit type for which the CCP is configured Neuron ID.
Advanced Functions Figure 43. Example of System Status Screen, page 2 System Name. Identifies this VariTrac system by name (editable) Operating Mode. Indicates whether the occupied or unoccupied mode is currently in effect Operating Status. Current operating status of the system. Options are fan only, morning warm-up, precool, heat, cool, or off Supply Air Temperature. The supply temperature currently communicated by the duct sensor assembly Supply Air Tempering.
Figure 44. Example of System Status Screen, page 3 System Name. Identifies this VariTrac system by name (editable) Changeover Allowed In. Time remaining before changeover is allowed Total Cool Requests. Sum total of normal and strong cool callers Total Heat Requests. Sum total of normal and strong heat callers Strong Cool Requests. Shows how many of the total cool callers are strong callers Strong Heat Requests.
Advanced Functions Figure 45. Example of System Status Screen, page 4 System Name. Identifies this VariTrac system by name (editable) External Time Clock Input. Indicates whether the time clock input on the CCP subbase is presently open or closed Supply Fan. Indicates whether the supply fan presently on or off Compressor #1. Indicates whether the Compressor #1 is presently on or off Compressor #2. Indicates whether Compressor #2 is presently on or off Heat #1.
Figure 46. Example of System Status Screen, page 5 System Name. Identifies this VariTrac system by name (editable) Worst Zone Deviation. Indicates how far the worst zone (+ or – °F) is from setpoint Worst Zone. Indicates which zone is presently furthest from setpoint (The following lines appears only when connected to a Voyager or Reliatel unit with an economizer.) OK to Economize. Indicates whether outdoor air is currently OK for free cooling Min O.A. Damper Setpoint.
Advanced Functions Zone Setup and Status The Zone Setup and Status section of the Advanced function allows you to perform in-depth setup up and monitoring of the VAV UCMs attached to the system. There are two parts to this section: Zone Setup Zone Status Zone Setup Zone Setup consists of five pages. (Page 5 only displays if the VAV UCM is Version 4.0 or later.) Navigate from screen to screen using the Up or Down arrows. To access zone setup from the VariTrac home screen: 1 Press Advanced.
Zone Name Press Zone Name to enter a description name for the Zone. The name can contain a maximum of 24 characters, including spaces. The default name is Zone xx. (See Figure 48.) Heat/Cool Vote Press Heat/Cool Vote to enable or disable the heat/cool vote for the zone. Each zone attached to the VariTrac CCP can vote for heating or cooling. Each zone has one vote. A zone can have its vote disabled so that it cannot make the VariTrac system bring on heating or cooling. (See Figure 48.
Advanced Functions Figure 49. Example of Zone Setup Selections Screen, page 2 Unoccupied Cooling Setpoint Press Unoccupied Cooling Setpoint to change the unoccupied cooling setpoint for the zone. Occupied Cooling Setpoint Press Occupied Cooling Setpoint to change the occupied cooling setpoint for the zone. This setpoint is active if the setpoint thumbwheel on the zone sensor is disabled, failed, or unavailable.
Figure 50. Example of Zone Setup Selections Screen, page 3 Zone-Sensor Setpoint Limits If the setpoint thumbwheel on the zone sensor attached to a zone UCM is enabled, the thumbwheel becomes the active occupied setpoint. The setpoint thumbwheel can be set anywhere from 45°F to 100°F. Reduce this range to 6°F or less during system commissioning. Cooling High Limit Press Cooling High Limit to change the local setpoint cooling high limit for the zone.
Advanced Functions Figure 51. Example of Zone Setup Selections Screen, page 4 Airflow Maximum Position Airflow values display in percent open for VariTrac pressure-dependent dampers and in flow rate for VariTrane pressure-independent boxes. Press Maximum Position to edit the zone maximum position setpoint. This is the maximum position to which the damper opens, unless overridden by a driveopen command.
Figure 52. Example of Zone Setup Selections Screen, page 5 Occupancy Sensor Setup (UCM 4.0 and later) Press Occupancy Sensor Setup to enable or disable the occupancy-sensor input for the occupied-standby function. A VariTrac UCM can be configured to perform a zone-occupied standby function. Occupied standby allows a zone to hold at its unoccupied setpoints until an occupancy sensor signals activity in the zone. The UCM then controls to its occupied setpoints.
Advanced Functions Zone Status To go to Zone Status, from the VariTrac home screen: 1 Press Advanced. 2 Press Zone Setup and Status. 3 Press Zone Status. The Building Information: Zone Status screen appears. (See Figure 53.) 4 Select a zone by pressing a button from the zone list. (You may need to use the Up or Down arrow to view all available zones.) Figure 53. Example of Zone Status Screen, page 1 Zone number and name.
Figure 54. Example of Zone Status Screen, page 2 Zone number and name. The zone number based on the UCM address and the current edited name of the VariTrac zone Zone damper position. Current position of the damper as a percentage (This will appear as cfm if the zone is configured to measure flow.) Present minimum setpoint. Current edited minimum damper position as a percentage (This will appear as cfm if the zone is configured to measure flow.) Maximum.
Advanced Functions Group Setup The Group Setup section allows you to access the setup functions and overrides for the four groups, and assigns the VAV UCMs attached to the system to one of the four groups. To access Group Setup from the home screen: 1 Press Advanced. 2 Press Group Setup. The Building Information: Group Status screen displays. (See Figure 55.) 3 Press a group button to select a group from the list. The Group Setup Selections screen displays. (See Figure 56.) Figure 55.
Group Name Press Group Name to enter a group description. The name can contain a maximum of 24 characters, including spaces. The default name is Group x. Vent Mode Press Vent Mode to enable or disable the ventilation mode for the group. When enabled, this mode allows dampers to open for greater ventilation. This occurs when the group is occupied and the air-conditioning system is in “zero energy” state (no stages of heating or cooling energized) for more than four minutes.
Advanced Functions View or Edit Current Group Members Each group can have up to 24 members (32 for delivered VAV). A zone can be assigned to any group, but a zone can only be a member of one group at a time. By default, all zones are assigned to Group 1. To change the zone membership for the group: 1 Press View or Edit Current Group Members button. The Group Member Editor screen displays the current group members. (See Figure 58.) 2 Press Add Member to add a new member to this group.
3 Press the button of the zone you wish to add to this group. 4 When the confirmation screen appears, press OK to add the zone to the group. 5 The Add Unassigned Member screen reappears. Repeat Steps 2-4 to add more zones, or press Home to exit this procedure. Figure 59.
Trane A business of American Standard Companies www.trane.com For more information contact your local district office or e-mail us at comfort@trane.com Literature Order Number VAV-SVU01A-EN File Number SV-AH-VAV-000-SVU01A-EN-1002 Supersedes New Stocking Location La Crosse Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
