Trane RT-PRC031-EN Humidification Control, LonTalk Building Automation System, Return Fan Control

Page 21

Controls VAV and CV

 

Design

Space CO2 Level

 

 

 

Min OA

 

 

Damper

 

Minimum

Setpoint

 

 

Min OA

 

 

 

 

Damper

 

 

Position

Damper

DCV Min

Target

 

 

OA

 

 

Damper

 

OA

Setpoint

 

 

 

 

CO2 Min

CO2 Design

 

Setpoint

Setpoint

CO2 Level

Figure 14. CO2 Control

Twinning requires an LCI module installed in each unit and is accomplished by binding variables between unit communication modules, communicating common setpoints and conditions (temperatures, pressures, fan speeds, damper positions, occupancy, states, etc.) and allowing each unit to run independent algorithms.

Twinned units must share a common supply and return duct network.

Twinned units operate:

a.as part of a Trane ICS™ installation, with Tracer Summit

b.on an interoperable project with a 3rd party LonTalk

c.as an independent group (bound via Rover® or 3rd party tool).

If there is a call for economizer cooling, the outdoor air damper may be opened further to satisfy the cooling request.

If the space CO2 level is greater than the CO2 Minimum Setpoint and less than the CO2 Design Setpoint, the outdoor air damper position is (or OA flow) modulated proportionally to the Space CO2 level relative to a point between the CO2 Min Setpoint and the CO2 Design Setpoint. If there is a call for economizer cooling, the outdoor air damper may be opened further to satisfy the cooling request. See Figure 14, p. 21

Humidification Control

A relay output is provided to control an externally connected, field supplied humidifier. Logic is provided for Occupied and Unoccupied humidification control with safeguards to prevent cycling between humidification and dehumidification

other cases the return fan is turned on or off with the supply fan.

LonTalk® Building

Automation System

The LonTalk Communication Interface for IntelliPak II (LCI-I) controller expands communications from the unit UCM network to a Trane Tracer Summit or a 3rd party building automation system, utilizing LonTalk, and allows external setpoint and configuration adjustment and monitoring of status and diagnostics. The LCI-I utilizes an FTT-10A Free Topology transceiver, which supports non-polarity sensitive, free topology wiring, which allows the system installer to utilize star, bus, and loop architectures.This controller works in standalone mode, peer-to-peer with one or more other units, or when connected to a Trane Tracer Summit or a 3rd party building automation system that supports LonTalk. The LCI-I controller is available as a factory or field-installed kit.

Return Fan Control

A return fan reduces the load on the supply fan motor or can allow a unit to operate at a higher static pressure.

The return fan VFD is modulated independently to maintain desired return air plenum pressure. In all

Twinning

Twinning is a Master Unit and one, or more, similarly configured Slave Unit(s) operating cooperatively, as a group, to provide higher capacity and/or redundancy at partial capacity.

RT-PRC031-EN

21

Page 20 Page 22
Image 21
Page 20 Page 22
Contents IntelliPak II Air Handlers Introduction Table of Contents Features and Benefits Standard FeaturesControls Cabinet Mechanical Features and Benefits Optional Features Features Summary Features and Benefits Field Installed AccessoriesInstallation and Service ReliabilityFeatures and Benefits Application Flexibility Integrated Comfort with Trane Tracer LCISimplifying the Comfort System Features and Benefits InteroperabilityOptimum 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 OnlyControls Variable Air Volume VAV Only Supply Air Setpoint ResetHeating 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 CVHuman Interface Panel HI Generic Building Automation System Module Gbas 0-5 vdcHuman 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 PlacementDuct Design Protecting Hydronic Coils From FreezingExternal 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 FactorsPerformance Data-Chilled Water Coil Capacities Chilled Water Coil Capacities-2 Row 5WDB 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 H20High Low PD Cartridge Bag Filters Cartridge Filters Throw Temp Hi Temp Away Prefilter CasingFilters 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 DataDimensional Data Unit Dimensions In.-One-Piece UnitReturn Exhaust Unit Height Fan Casing Downflow/Horizontal Airflow Configuration Dimensions OpeningSupply 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 BoxDimensions Blank Casing Section 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 Weights Approximate Operating Weights LbsComponent Weights Lbs Weights Roof Curb Weights Installed Shipping Casing Blank WeightSize Wt lbs Control Box Main 454 Convenience Outlet Options Filters OptionsSystem Control Fresh AirMiscellaneous Options Agency ApprovalElectronic Zone Sensors Field Installed AccessoriesRoof Curb Mechanical Specifications GeneralElectrical 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
Top Page Image Contents