Trane SCXG-SVX01B-EN manual Purge sequence D, Supply fan on Supply fan VFD on if equipped

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general

Operation information

PURGE sequence “D”

This sequence can purge the air out of a building before coming out of unoccupied mode of operation in aVAV system. Also, it can be used to purge smoke or stale air.

Supply fan – on

Supply fan VFD – on (60 hz)

Inlet guide vanes/VAV boxes – open

Outside air damper – open

Heat – all stages – off, modulating heat output at 0 vdc

Occupied/Unoccupied output – energized

VO relay – energized

Exhaust fan (field-installed) - on

Exhaust damper (field-installed) - open

PURGE with duct pressure control “E” This sequence can be used when supply air control is required for smoke control.

Supply fan – on

Supply fan VFD – on (if equipped)

Inlet guide vanes – controlled by supply air pressure control function with supply air pressure high limit disabled

Outside air dampers – open

Heat – all stages – off, hydronic heat output at 0 vdc

Occupied/unoccupied output – energized

VO relay – energized

Exhaust fan (field-installed) - on

Exhaust damper (field-installed) - open

Note: Each system (cooling, exhaust, supply air, etc.) within the unit can be redefined in the field for each of the five sequences, if required. Also the definitions of any or all of the five sequences may be locked into the software by simple key strokes at the human interface panel. Once locked into the software, the sequences cannot be changed.

Exhaust/Comparative Enthalpy (ECEM ) Module - Option used on units with comparative enthalpy option

The exhaust/comparative enthalpy module receives information from the return air humidity sensor, and the RTM outside air temperature sensor and outside air humidity sensor, the outside air humidity sensor and temperature sensor to utilize the lowest possible enthalpy level when considering economizer operation. In addition, it receives space pressure information to maintain the space pressure within the setpoint control band. Refer to the Figure O-GI-1 for humidity vs. voltage values.

Figure O-GI-1. ECEM relative humidity vs. voltage

Ventilation Control Module (VCM) - Available only with Traq™ Damper Option

The ventilation control module (VCM) is located in the airside economizer section of the unit and linked to the unit’s UCM network. Using a velocity pressure transducer/solenoid (pressure sensing ring) in the fresh air section allows the VCM to monitor and control fresh air entering the unit to a minimum airflow setpoint. See Figure O-GI-2 for a detail view of the velocity pressure transducer/ solenoid assembly.

An optional temperature sensor can be connected to the VCM to enable control of a field installed fresh air preheater.

Also, a field-provided CO2 sensor can be connected to the VCM to control CO2 reset. The reset function adjusts the minimum cfm upward as the CO2 concentrations increase. The maximum effective (reset) setpoint value for fresh air entering the unit is limited to the system’s operating cfm.Table O-GI-5 lists the minimum outside air cfm vs. input voltage.

Table O-GI-5. Minimum outside air setpoint w/VCM module and Traq™ sensing

Unit

InputVolts

CFM

SXWG 20

0.5 - 4.5 vdc

6,350-8,500

SXWG 25

0.5 - 4.5 vdc

7,250-10,625

SXWG 30

0.5 - 4.5 vdc

7,250-12,750

SXWG 35

0.5 - 4.5 vdc

7,250-14,875

SXRG 20

0.5 - 4.5 vdc

7,250-8,500

SXRG 25

0.5 - 4.5 vdc

7,250-10,625

SXRG 32

0.5 - 4.5 vdc

7,250-13,600

Trane IntelliPak Lon-Talk Communication Module (LCI-I Option used on units with Trane ICSTM or 3rd party Building AutomationSystems)

The LonTalk Communication Interface module expands communications from the unit UCM network to aTraneTracer SummitTM or a 3rd party building automation system, utilizing LonTalk, and allows external setpoint and configuration adjustment and monitoring of status and diagnostics.

Figure O-GI-2.Velocity pressure transducer/ solenoid assembly

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SCXG-SVX01B-EN

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Contents JO and later design sequence ModelsSpecial Note on Refrigeration Emissions IntroductionHazard Identification HazardousVoltage w/CapacitorsContents Features and Benefits Refrigerant Handling ProceduresModular Series Self-Contained Unit Components Installation information Unit NameplateModel Number Description Scwg Model Number DescriptionDigit Digit 31 Compressor ServiceValvesDigit 22 Unit Finish Digit 24 Unit ConnectionSelf-Contained Ship-WithAccessory Model Number Description Model Number Description PswgAfter-ShipmentAccessory Model Number Receiving and Handling Shipping PackageInstallation Preparation Section ServiceAccessTable I-PC-1. Service and code clearance requirements TopView CCRC/CIRC 20, 29Rigging and Unit Handling Lifting Equipment CapacityUnit Handling Procedure Figure I-PC-7.Assembled modular unit proper riggingRemove panels FML, FMM, and FMR Split-Apart Unit AssemblyIntelliPak UnitsUCM Only Units with Thermostat OnlyFigure I-PC-9 How to assemble the split apart modular unit External Unit Isolation Pre-Installation ChecklistSkid Removal SCWG/SIWG Dimensions, DimensionsWeights Left-side viewLeft-side View Right-side view Top view SCRG/SIRG Dimensions,SCRG/SIRGWeight, lbs Dimensions Weights Detail Dimensions,CCRC/CIRC Electrical connections, CCRC/CIRC Air-cooled condenser dimensions & weight, in-lbsCCRC/CIRC -Air-Cooled Condenser CCRC/CIRC Refrigerant connections,Hot water coil dimensions & weight, in-lbs Hot Water CoilSteam coil dimensions, in-lbs Steam CoilFlexible Horizontal Discharge Plenum Electric heat coil dimensions & weight, in-lbsElectric Heat Coil Waterside economizer weight, in-lbs Waterside EconomizerDetail a Detail B Airside economizer dimensions & weight, in-lbsAirside Economizer Control and LineVoltage Dimensions Weights VFDVariable Frequency Drive Option VFD Result in death or serious injury Mounting RequirementsVariable Frequency Drive with Bypass Electrical Installation ProcedureVFD with bypass dimensions, Water Piping Mechanical SpecificationsDuct Connections Hazardous Voltage w/Capaci- torsWaterside Piping Arrangements Table I-MR-1. Water Connection SizesHazard of Explosion and Deadly Gases Brazing ProceduresRefrigerant Piping Air-Cooled Units Only Live Electrical Components Unit Wiring DiagramsSupply PowerWiring Equipment DamageSelection Procedures Supply Fan Isolators Installation requirementsPre-Startup Procedures Shipping bracketFigure I-PR-3. Correct plenum insulation placement Field Wiring Connections Airside Economizer InstallationUnit Installation Unit HandlingTransducer Location Static PressureTransducer Installation VAV units onlyInstalling theTransducer Waterside Economizer Installation Procedure Figure I-PR-7. Installing the waterside economizerTubing assemblies for waterside econo Mizer left-hand piping Waterside Economizer Ship-Separate Parts List Unit Structural Integrity Hydronic Coil InstallationInstallation Procedure Table I-PR-2.Available Electric Heat kW Electric Heat InstallationElectric Heat CoilWiring Procedure CV Unit Zone Sensor Options Standard with All IntelliPak UnitsZone Sensor Options for IntelliPak Control Units BAYSENS077* DescriptionBAYSENS074 Description CV andVAV Unit Zone Sensor OptionsVAV Unit Zone Sensor Option BAYSENS073 DescriptionMounting Location Zone Sensor InstallationWiring Mounting the SubbaseRight Mounting Directly to the Wall Mounting to Junction Box Programmable Zone Sensors ConstantVolume Zone Sensor BAYSENS019 DescriptionVariable AirVolume Zone Sensor BAYSENS020B Description Programmable Zone Sensor Installation Airflows from adjacent zones or other unitsWiring theTimeclock Time Clock InstallationTime Clock Installation Checklist Time Clock OptionRemote Human Interface Panel Remote Human Interface Panel InstallationHuman Interface HI Panel Location RecommendationsWall Mounting the RHI Panel ProcedureMounting the Remote Human Interface RHI Panel Pre-startup Communication Link ShieldedTwisted PairWiring Wiring the Remote Human InterfaceLowVoltage AC FieldWiring Connections Interprocessor Communication Bridge ModuleWiringConnecting toTracer Summit Pre-Startup ChecklistInstallation programming Programmable Zone Sensor OptionsHeat supply air Cool supply air Warmup temperature During Programming IndicatesKeypad Operation Keypad Lockout Temporary Manual OverrideTime Button Up and Down Button ArrowsTemporary Override Run Mode Figure I-P-6.Temporary manual override menu screenFigure I-P-7.Temporary manual override run mode screen Table I-P-1. Zone sensor BAYSENS019 option menu settingsTo use Intelligent Copy Remote Panel Indicator Signals From UCM to ZSMIntelligent Copy Off FlashingIcon Descriptions Figure I-P-9.BAYSENS019 complete icon displayFigure I-P-10.BAYSENS020 complete icon display Programming Setting theTimeProgramming theTime Clock Option To review and change programsPre-Startup Checklist Installation startupUnit Startup Procedures Compressor DamageCompressor Amp Draw Startup LogEvaporator Water Cooled Units Air Cooled UnitsPoints List Ecem Module Points List RTM ModulePoints List Gbas Module Points List -TracerTMLCI-I ModuleUnit Control Components RTM Module Board Standard on all UnitsTable O-GI-3. RTM setpoint analog inputs Table O-GI-2. RTM sensor resistance vs. temperatureVAV Box Option Ventilation Override Module VOM Option Human Interface Module Standard on all UnitsHeat Module Purge sequence D Supply fan on Supply fan VFD on if equippedGeneric BuildingAutomation System Module Option Table O-GI-6. Gbas analog input setpoints Table O-GI-7. Gbas input voltage corresponding setpointsWaterside Components Figure O-GI-3. Basic water piping, constant water flow UnitAirside Components General Operation information Airside Economizer Interface with Comparative Enthalpy Air-Cooled CondensersInput Devices and System Functions ProperWaterTreatmentSupply Airflow Proving Switches Return AirTemperature SensorSupply Air Temperature Sensor Filter SwitchUnoccupied Sequence of Operation Operation operationControl Sequences Operation Tracer Summit SystemTimed Override Activation ICS Morning WarmupCycling Capacity Morning Warmup MWU Occupied Sequence Water-Cooled Units Only Supply Air Setpoint Reset VAV Units OnlyMechanical Cooling Electric HeatTable O-SO-1. Compressor Stages CompressorsCompressor Lead/Lag Operation Table O-SO-2. Pressure cutouts Step ControlEvaporator Coil Frost Protection Service Valve Option OperationMaintenance information Table M-GI-1. SCWG/SIWG/SCRG/SIRG General Maintenance DataAir Filters Maintenance proceduresMaintenance Procedures Remove all standing water Inspecting and Cleaning the Drain PanInspecting and Cleaning the Fan Fan Drive Supply FanVariable Frequency Drive VFD Table M-MP-2.AO Smith Bearing Lubrication Schedule Fan BearingsTable M-MP-1. Baldor Fan Bearing Lubrication Schedule Table M-MP-3. Compatible Fan Bearing GreaseTable M-MP-4. Fan shaft bearing torques Fan BeltTensionDeflection = belt span/64 Adjusting BeltTension BeltRefrigerant Evacuation Refrigerant SystemConfined Space Hazards Use of Pressure Regulator Valves Gauges Refrigerant LeakTestingMotor Winding Damage R407cMaintenance Inlet GuideVanes Coil Fin CleaningProper Coil CleaningAgent Coil Freezeup Cleaning the Flow Switch Chemical Cleaning of Condenser and Economizer CoilFlow Switch Maintenance Piping ComponentsSemi-Annual Maintenance Maintenance Periodic ChecklistsMonthly Checklist Annual MaintenanceCommon Unit Problems and Solutions Check the zone thermostat settingsOperating Procedures System ChecksMaintenance diagnostics DiagnosticsEntering Cond WaterTemp Sensor Fail Heat Module Auxilliary Temperature Sensor FailEmergency Stop Entering Water Temp Sensor FailLow Pressure Control Open Circuit 1, 2, 3, or Mode Input FailureLow Air Temp Limit Trip MCM Communications FailureHumidity Sensor Failure NSB Panel ZoneTemperature Sensor FailureCheck Field/unit wiring between RTM and NSB Panel Temp. Sensor FailureRTM Data Storage Error RTM Zone Sensor FailureSupply Fan Failure Supply Fan VFD Bypass EnabledProblemThe LCI-I has lost communication withTracer Summit LCI-I Module Comm FailureWSM Communications Fail Render all HI keystrokes ineffectiveVOM Communications Failure WSM Mixed AirTemp Sensor Fail Water Flow Fail114 115 Literature Order Number

SCXG-SVX01B-EN specifications

The Trane SCXG-SVX01B-EN is an advanced variable refrigerant flow (VRF) system designed to provide efficient and flexible heating and cooling solutions for commercial and residential applications. This system exemplifies Trane's commitment to innovation, energy efficiency, and ease of installation, making it a standout choice in the industry.

One of the main features of the SCXG-SVX01B-EN is its ability to deliver precise temperature control across multiple zones. The system utilizes a modular design that allows for the connection of multiple indoor units to a single outdoor unit, enabling simultaneous heating and cooling in different areas of a building. This zoned comfort not only enhances occupant satisfaction but also contributes to energy savings by allowing for targeted climate control where it is most needed.

Trane's VRF technology is complemented by its inverter-driven compressors, which adjust their speed according to the demand for heating or cooling. This means that the system operates more efficiently than traditional systems by consuming less energy during partial load conditions. The SCXG-SVX01B-EN also integrates advanced heat recovery capabilities, allowing it to transfer heat from one zone to another, further optimizing energy usage.

The unit's compact design simplifies installation, making it suitable for both retrofit projects and new constructions. The flexible piping layout supports various configurations, allowing easy adaptation to the building's architecture. The model also incorporates intelligent controls, offering a user-friendly interface that enhances operational flexibility and promotes energy management.

In addition to its performance features, the Trane SCXG-SVX01B-EN emphasizes sustainability. It uses advanced refrigerants with low global warming potential (GWP), aligning with environmental regulations and helping to minimize the system's ecological footprint. The durable construction of the system ensures longevity and reliability, reducing maintenance costs and enhancing overall operational efficiency.

Finally, Trane supports its products with comprehensive warranties and a network of service professionals, ensuring that customers have access to expert assistance throughout the life cycle of their system. The SCXG-SVX01B-EN represents a blend of technology, efficiency, and versatility, making it an ideal choice for those seeking an effective heating and cooling solution.