Trane RT-PRC031-EN manual Zone Temperature Control

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Controls Variable Air Volume (VAV) Only

overheat. The supply air temperature setpoint is adjusted based on the temperature of the critical zone(s). This can have the effect of improving comfort and/or lowering energy usage. The user-defined parameters are the same as for outdoor air reset. See Figure 12, p. 12

Supply Air Tempering

Modulating gas, electric, hot water and steam heat units only—When supply air temperature falls below the supply air temperature deadband low end, the heat valve will be modulated to maintain the set minimum supply air temperature.

Zone Temperature

Control

Unoccupied Zone Heating and Cooling

During Unoccupied mode, the unit is operated as a CV unit. Inlet guide vanes are driven full open, VFDs operate at 100%, and VAV boxes are driven full open. The unit controls zone temperature within the Unoccupied zone cooling and heating (heating units only) setpoints.

Daytime warm-up

This feature is available on all types of heating units. During Occupied mode, if the zone temperature falls to a preset, user-defined zone low limit temperature setpoint, the unit is put into Unoccupied mode and Daytime Warm-up is initiated. The system changes over to CV heating (full unit airflow), the VAV boxes are fully opened and full heating capacity is provided until the Daytime Warm-up setpoint is reached. The unit is then returned to normal Occupied mode.

Fresh Air Measurement

Trane air quality (TRAQ™) fresh air measurement damper system utilizes velocity pressure sensing rings. Based on unit design CFM, the ventilation control module (VCM) monitors and controls the quantity of fresh outside air entering the unit. The outside airflow can be calibrated to accommodate for altitude.

a.An optional temperature sensor may be connected to the ventilation control module to enable it to control a field-installed pre-heater.

b.An optional CO2 sensor may be connected to the ventilation control module to control fresh air based on CO2 Demand Control Ventilation (DCV).

Outside Air CFM

Compensation

As the supply fan (IGV or VFD) modulates, this function proportionally adjusts the economizer minimum position to compensate for the change in total airflow, in order to maintain a constant percent of outside air. The modified economizer minimum position is computed as a linear function, based on IGV or VFD position, given the two endpoints,

a.Minimum Position with IGV/ VFD @ 0%

b.Minimum Position with IGV/ VFD @ 100%

which are user adjustable at the Human Interface Panel.

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 Summary Features and Benefits Field Installed AccessoriesInstallation and Service ReliabilityIntegrated Comfort with Trane Tracer LCI Features and Benefits Application FlexibilitySimplifying the Comfort System Interoperability Features and BenefitsOptimum Building Comfort Control Statitrac Statitrac Direct Space Building Pressurization ControlVariable Frequency Drives VFD Supply Fans with Inlet Guide VanesSupply Air Temperature Controls Supply Air Pressure Control Controls Variable Air Volume VAV OnlySupply Air Setpoint Reset Controls Variable Air Volume VAV OnlyHeating Zone Temperature Control Occupied Zone Temperature Control Controls Constant Volume CV OnlyHeating Gas Heating Two-StageUnoccupied Zone Temperature Control Controls Constant Volume CV Only Auto ChangeoverCooling and Heating Hot Water or Steam HeatingSpace Pressure Control Statitrac Controls VAV and CVMorning Warm-up Options Emergency OverrideVentilation Override Module VOM Controls VAV and CVGeneric Building Automation System Module Gbas 0-5 vdc Human Interface Panel HIHuman Interface Panel Main Menu Chilled Water Coil Freeze Stat Generic Building Automation System Module Gbas 0-10 vdcSteam and Hot Water Coil Freeze Avoidance Night Setback SensorsOccupied/Unoccupied input on the RTM Dry Bulb Temperature Control of EconomizerTrane Tracer or BAS System Timed Override ActivationLonTalk Building Automation System Humidification ControlReturn Fan Control TwinningExhaust/Return Fan Options Applications ConsiderationsApplication Recommendations AdvantagesApplications Considerations Supply and Return Airflow ConfigurationsReturn Airflow Configuration Supply Airflow ConfigurationWith Bag CartridgeVentilation Override Sequences Corrosive AtmospheresNatural Gas Heating Considerations Acoustical ConsiderationsClearance Requirements Unit PlacementProtecting Hydronic Coils From Freezing Duct DesignExternal Piping Enclosure Selection Procedure Selection Procedure Return Fan Motor Sizing Exhaust Fan Motor SizingUnit Electrical Requirements Altitude CorrectionsDigit 7 Chilled Water Coil FIN Series Model Number DescriptionDigit 20 System Control Selection Model Number DescriptionDigit 38 Belt Guards Burglar BARS/MARINE Lights General Data General Data All dimensions in inchesGeneral Data Economizer Outdoor Air Damper Leakage at rated airflowi Gas Heat Inputs/Input RangesInputs MBH Input MBH Range MBH Standard Damper Optional Low Leak DamperWet Bulb Temperature Btu per Pound Performance Adjustment FactorsEnthalpy of Saturated Air Gas Heating Capacity Altitude Correction FactorsChilled Water Coil Capacities-2 Row 5W Performance Data-Chilled Water Coil CapacitiesDB F WB F Chilled Water Coil Capacities-4 Row W Performance Data-Chilled Water Coil CapacitiesChilled Water Coil Capacities-6 Row WD Chilled Water Coil Capacities-8 Row WD Total Static Pressure Std Air Supply Fan Performance Standard CFM Casing a1644 Supply Fan w/o IGV 931 Supply Fan Performance Standard CFM -Casing B1117 Supply Fan Performance Standard CFM-Casing B 749 Supply Fan Performance Standard CFM Casing C1019 Std Air Total Static PressurePerformance 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 Negative Static Pressure Std Air Performance Data-Exhaust FanStatic PresureInWC Performance Data-Exhaust Fan237i Wocfm 415 Exhaust Fan Performance Standard CFM-Case C 32 Fan0 R P M Return Fan Performance Standard CFM-Case a 36.5 Fan Performance Data-Return FanReturn Fan Performance Performance Data-Return FanReturn Fan Performance Standard CFM-Case B and Case C 40 Fan Return Fan Performance Performance Data-Heat Electric Heat Air Temperature RiseNatural Gas Heating Capacities1 Electric Heat kw RangesHot Water Coil Heating Capacities Q/ITD Performance Data-HeatSteam Coil Heating Capacities Q/ITD Properties of SteamComponent Static Pressure Drops in. H2O Chilled Water Coil Airside Pressure Drop in H20Cartridge Filters Throw Temp Hi Temp Away Prefilter Casing High Low PD Cartridge Bag FiltersFilters Prefilter Drive No Supply Air Fan Drive SelectionsExhaust Air Fan Drive Selections Horse Power HP Low Casing StdReturn Air Fan Drive Selections 15 HP 20 HP 25 HP 30 HP 40 HP Drive NoElectrical Data Electrical Service SizingSet 1. Cooling with Gas Heat Air Handling Units Set 2. Cooling with Electric HeatElectrical Service Sizing Data-Motors Voltage Utilization Range Electrical DataUnit Voltage Nominal Tons Voltage 460 575 FLA Add 90-150Unit Top/Front View Dimensional DataUnit 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 Unit Option Selection Door Swing Ft. Standard Minimum Required ClearanceMinimum 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 Filters OptionsSystem Control Fresh AirMiscellaneous Options Agency ApprovalElectronic Zone Sensors Field Installed AccessoriesRoof Curb General Mechanical SpecificationsElectrical System Water Valve Mechanical Specifications Cooling System Chilled Water CoilExternal Piping Enclosure Air Handling SystemMechanical Specifications Filters Exhaust Air Mechanical SpecificationsNo Relief Standard Percent Modulating Exhaust Fan OptionFresh Air Mechanical Specifications Return AirHeating System CO2 Sensing Page RT-PRC031-EN
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