Trane RT-PRC031-EN Controls VAV and CV, Space Pressure Control Statitrac, Morning Warm-up Options

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Controls VAV and CV

Common to VAV and CV Units

Space Pressure Control - Statitrac™

A pressure transducer is used to measure and report direct space (building) static pressure. The user- defined control parameters used in this control scheme are space static pressure setpoint, space pressure deadband and exhaust enable point.

As the economizer opens, the building pressure rises and once above the exhaust enable point, enables the exhaust fan and dampers or exhaust VFD. The exhaust dampers or VFD then modulate to maintain space pressure within the deadband.

Morning Warm-up Options

This feature may be enabled on all types of factory installed heat units as well as cooling only units configured as “External Heat” (for example, VAV boxes with reheat).

At the conclusion of Unoccupied mode, while the economizer (if supplied) is kept closed, the selected zone is heated to the user-defined Morning Warm-up setpoint. The unit is then released to Occupied mode. There are two types of Morning Warm-up: full capacity or cycling capacity.

Full Capacity Morning Warm-up (MWU)

Full capacity Morning Warm-up uses full heating capacity, and heats the zone up as quickly as possible. Full heating capacity is provided until the Morning Warm-up setpoint is met. At this point, the unit is released to occupied mode.

Cycling Capacity Morning Warm- up (MWU)

Cycling capacity Morning Warm-up provides a more gradual heating of the zone. Normal zone temperature control with varying capacity is used to raise the zone temperature to the

MWU zone temperature setpoint. This method of warm-up is used to overcome the “building sink” effect. Cycling capacity MWU will operate until the MWU setpoint is reached or for 60 minutes, then the unit switches to Occupied mode.

A control algorithm is used to increase or decrease the amount of heat in order to achieve the MWU zone temperature setpoint.

Note: When using the Morning Warm-up option in a VAV heating/cooling air handler, airflow must be maintained through the air handler unit. This can be accomplished by electrically tying the VAV boxes to the VAV box output relay contacts on the Rooftop Module (RTM) or by using changeover thermostats. Either of these methods will assure adequate airflow through the unit and satisfactory heating of the building.

Emergency Override

When a LonTalk communication module is installed, the user can initiate from the Trane Tracer Summit or 3rd party BAS one of five

(5)predefined, not available to configure, Emergency Override sequences. The Humidification output is deenergized for any Emergency Override sequence. Each Emergency Override sequence commands the unit operation as follows:

1.PRESSURIZE_EMERG:

–Supply Fan - On

–Supply Fan IGV / Supply Fan VFD Open/Max (if so equipped)

–Exhaust Fan - Off; Exhaust Dampers Closed (if so equipped)

–OA Dampers - Open; Return Damper - Closed

–Heat - All heat stages off; Mod Heat output at 0 vdc

–Occupied/Unoccupied/VAV box output - Energized

–VOM Relay - Energized (if so equipped)

–Preheat Output - Off

–Return Fan - Off; Exhaust Dampers - Closed (if so equipped)

–Return VFD - Min (if so equipped)

2.EMERG_DEPRESSURIZE:

–Supply Fan - Off

–Supply Fan IGV / Supply Fan VFD - Closed/Min (if so equipped)

–Exhaust Fan - On; Exhaust Dampers Open/Max (if so equipped)

–OA Dampers - Closed; Return Damper - Open

–Heat - All heat stages off; Mod Heat output at 0 vdc

–Occupied/Unoccupied/VAV box output - Energized

–VOM Relay - Energized (if so equipped)

–Preheat Output - Off

–Return Fan - On; Exhaust Dampers - Open (if so equipped)

–Return VFD - Max (if so equipped)

3.EMERG_PURGE:

–Supply Fan - On

–Supply Fan IGV / Supply Fan VFD - Open/Max (if so equipped)

–Exhaust Fan - On; Exhaust Dampers Open (if so equipped)

–OA Dampers - Open; Return Damper - Closed

–Heat - All heat stages off; Mod Heat output at 0 vdc

–Occupied/Unoccupied/VAV box output - Energized

–VOM Relay - Energized (if so equipped)

–Preheat Output - Off

–Return Fan - On; Exhaust Dampers - Open (if so equipped)

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RT-PRC031-EN

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Contents IntelliPak II Air Handlers Introduction Table of Contents Standard Features Features and BenefitsControls Cabinet Mechanical Features and Benefits Optional Features Features and Benefits Field Installed Accessories Features SummaryInstallation and Service ReliabilityIntegrated Comfort with Trane Tracer LCI Features and Benefits Application FlexibilitySimplifying the Comfort System Interoperability Features and BenefitsOptimum Building Comfort Control Statitrac Direct Space Building Pressurization Control StatitracSupply Fans with Inlet Guide Vanes Variable Frequency Drives VFDControls Variable Air Volume VAV Only Supply Air Temperature Controls Supply Air Pressure ControlSupply Air Setpoint Reset Controls Variable Air Volume VAV OnlyHeating Zone Temperature Control Controls Constant Volume CV Only Occupied Zone Temperature ControlHeating Gas Heating Two-StageControls Constant Volume CV Only Auto Changeover Unoccupied Zone Temperature ControlCooling and Heating Hot Water or Steam HeatingControls VAV and CV Space Pressure Control StatitracMorning Warm-up Options Emergency OverrideControls VAV and CV Ventilation Override Module VOMGeneric Building Automation System Module Gbas 0-5 vdc Human Interface Panel HIHuman Interface Panel Main Menu Generic Building Automation System Module Gbas 0-10 vdc Chilled Water Coil Freeze StatSteam and Hot Water Coil Freeze Avoidance Night Setback SensorsDry Bulb Temperature Control of Economizer Occupied/Unoccupied input on the RTMTrane Tracer or BAS System Timed Override ActivationHumidification Control LonTalk Building Automation SystemReturn Fan Control TwinningApplications Considerations Exhaust/Return Fan OptionsApplication Recommendations AdvantagesSupply and Return Airflow Configurations Applications ConsiderationsSupply Airflow Configuration Return Airflow ConfigurationWith Bag CartridgeCorrosive Atmospheres Ventilation Override SequencesNatural Gas Heating Considerations Acoustical ConsiderationsUnit Placement Clearance RequirementsProtecting Hydronic Coils From Freezing Duct DesignExternal Piping Enclosure Selection Procedure Selection Procedure Exhaust Fan Motor Sizing Return Fan Motor SizingUnit Electrical Requirements Altitude CorrectionsModel Number Description Digit 7 Chilled Water Coil FIN SeriesModel Number Description Digit 20 System Control SelectionDigit 38 Belt Guards Burglar BARS/MARINE Lights General Data All dimensions in inches General DataGeneral Data Gas Heat Inputs/Input Ranges Economizer Outdoor Air Damper Leakage at rated airflowiInputs MBH Input MBH Range MBH Standard Damper Optional Low Leak DamperPerformance Adjustment Factors Wet Bulb Temperature Btu per PoundEnthalpy of Saturated Air Gas Heating Capacity Altitude Correction FactorsChilled Water Coil Capacities-2 Row 5W Performance Data-Chilled Water Coil CapacitiesDB F WB F Performance Data-Chilled Water Coil Capacities Chilled Water Coil Capacities-4 Row WChilled Water Coil Capacities-6 Row WD Chilled Water Coil Capacities-8 Row WD Supply Fan Performance Standard CFM Casing a Total Static Pressure Std Air1644 Supply Fan w/o IGV Supply Fan Performance Standard CFM -Casing B 9311117 Supply Fan Performance Standard CFM-Casing B Supply Fan Performance Standard CFM Casing C 7491019 Total Static Pressure Std AirPerformance Data Supply Fan with Inlet Guide Vanes Performance Data Supply Fan with Inlet Guide Vanes Supply Fan Performance Standard CFM-Casing a Supply Fan Performance Standard CFM Casing B 1093 1600 RPM 1500 RPM 779 1021 1283 Performance Data-Exhaust Fan Negative Static Pressure Std AirPerformance Data-Exhaust Fan Static PresureInWC237i Wocfm Exhaust Fan Performance Standard CFM-Case C 32 Fan 4150 R P M Performance Data-Return Fan Return Fan Performance Standard CFM-Case a 36.5 FanPerformance Data-Return Fan Return Fan PerformanceReturn Fan Performance Standard CFM-Case B and Case C 40 Fan Return Fan Performance Electric Heat Air Temperature Rise Performance Data-HeatNatural Gas Heating Capacities1 Electric Heat kw RangesPerformance Data-Heat Hot Water Coil Heating Capacities Q/ITDSteam Coil Heating Capacities Q/ITD Properties of SteamChilled Water Coil Airside Pressure Drop in H20 Component Static Pressure Drops in. H2OCartridge Filters Throw Temp Hi Temp Away Prefilter Casing High Low PD Cartridge Bag FiltersFilters Prefilter Supply Air Fan Drive Selections Drive NoHorse Power HP Low Casing Std Exhaust Air Fan Drive SelectionsReturn Air Fan Drive Selections 15 HP 20 HP 25 HP 30 HP 40 HP Drive NoElectrical Service Sizing Electrical DataSet 1. Cooling with Gas Heat Air Handling Units Set 2. Cooling with Electric HeatElectrical Service Sizing Data-Motors Electrical Data Voltage Utilization RangeUnit Voltage Nominal Tons Voltage 460 575 FLA Add 90-150Dimensional Data Unit Top/Front ViewUnit Dimensions In.-One-Piece Unit Dimensional DataReturn Exhaust Unit Height Fan Casing Opening Downflow/Horizontal Airflow Configuration DimensionsSupply Opening Blank Casing Gas Heat Section Electrical Entry Details Piping Chilled Water Piping Locations Minimum Required Clearance Unit Option Selection Door Swing Ft. StandardMinimum Required Clearance Ft Control Exh BoxBlank Casing Section Dimensions Blank Casing SectionCross Member Location Blank Casing Section Field Installed Sensors Variable Air Volume VAV Field Installed Sensors Constant Volume CV Field Installed Sensors VAV and CV Wireless Zone Sensor Wall or Duct Mount CO2 Zone Sensors Approximate Operating Weights Lbs WeightsComponent Weights Lbs Weights Installed Shipping Casing Blank Weight Roof Curb WeightsSize Wt lbs Control Box Main 454 Convenience Outlet Options Options FiltersFresh Air System ControlAgency Approval Miscellaneous OptionsField Installed Accessories Electronic Zone SensorsRoof Curb General Mechanical SpecificationsElectrical System Mechanical Specifications Cooling System Chilled Water Coil Water ValveExternal Piping Enclosure Air Handling SystemMechanical Specifications Filters Mechanical Specifications Exhaust AirNo Relief Standard Percent Modulating Exhaust Fan OptionMechanical Specifications Return Air Fresh AirHeating System CO2 Sensing Page RT-PRC031-EN
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