Trane SCXG-SVX01B-EN manual Fan BeltTension, Deflection = belt span/64

Page 96

maintenance

Maintenance procedures

Fan BeltTension

Note: Check fan belt tension at least twice during the first days of new belt operation since there is a rapid decrease in tension until belts are run-in.

Proper belt tension is necessary to endure maximum bearing and drive component life and is based on fan brake horsepower requirements. If frayed or worn, replace belts in matched sets.

Measuring BeltTension Measure fan belt tension with a Browning, Gates, or equivalent belt tension gauge. Determine deflection by dividing the belt span distance (in inches) by 64. See Figure M-MP-6. Follow the procedure below to measure belt tension.

1.Measure belt span between centers of sheaves and set the large “O” ring of the tensioning gauge at 1/64 inch for each inch of belt span.

2.Set the load “O” ring at zero.

3.Place the large end of the gauge at the center of the belt span. Press down until the large “O” ring is even with the top of the belt line or the next belt as in Figure M-MP-6. Place a straight edge across the sheaves as a reference point. See Figure M-MP-4.

4.Remove the gauge. Note that the load “O” ring now indicates a number on the plunger scale. This number represents pounds of force required to deflect the belt.

5.Check the reading from step 4 against the values given inTable M-MP-4. If necessary, readjust belt tension.

Table M-MP-4. Fan shaft bearing torques

setscrew

hex-size

recommended torque

size

across flats

In-lb

ft-lb

1/4"-20

1/8"

180

15

5-16"-18

5-32"

402

33.5

Table M-MP-5. Fan hub and sheave torques

 

unit

fan

setscrew

torque

 

size

dia.

size

(ft-lbs)

 

SCWF 20

16.5"

5/16"

12

 

SCWF 22

 

 

 

 

SCWF 25

 

 

 

 

SCRF 20

 

 

 

 

SCWF 29

18"

5/16"

12

 

SCWF 32

 

 

 

 

SCRF 25

 

 

 

 

SCRF 30

 

 

 

 

SCWF 35

20"

5/16"

14

 

SCWF 38

 

 

 

 

SCRF 30

 

 

 

 

SCRF 35

 

 

 

 

SCWF 42

25"

3/8"

24

 

SCWF 46

 

 

 

 

SCWF 52

 

 

 

 

SCWF 58

 

 

 

 

SCRF 40

 

 

 

 

SCRF 50

 

 

 

 

SCWF 65

27"

3/8"

24

Figure M-MP-5. Belt tension gauge

SCWF 72

SCWF 80

SCRF 60

SCWF 90

SCWF C0

SCWF C1

deflection = belt span/64

Figure M-MP-6. Fan belt adjustment

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SCXG-SVX01B-EN

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Contents JO and later design sequence ModelsIntroduction Hazard IdentificationSpecial Note on Refrigeration Emissions HazardousVoltage w/CapacitorsContents Features and Benefits Refrigerant Handling ProceduresModular Series Self-Contained Unit Components Installation information Unit NameplateModel Number Description Scwg Model Number DescriptionDigit 31 Compressor ServiceValves Digit 22 Unit FinishDigit Digit 24 Unit ConnectionSelf-Contained Ship-WithAccessory Model Number Description Model Number Description PswgAfter-ShipmentAccessory Model Number Receiving and Handling Shipping PackageInstallation Preparation ServiceAccess Table I-PC-1. Service and code clearance requirementsSection TopView CCRC/CIRC 20, 29Rigging and Unit Handling Lifting Equipment CapacityUnit Handling Procedure Figure I-PC-7.Assembled modular unit proper riggingSplit-Apart Unit Assembly IntelliPak UnitsUCM OnlyRemove panels FML, FMM, and FMR Units with Thermostat OnlyFigure I-PC-9 How to assemble the split apart modular unit Pre-Installation Checklist Skid RemovalExternal Unit Isolation Dimensions WeightsSCWG/SIWG Dimensions, Left-side viewSCRG/SIRG Dimensions, SCRG/SIRGWeight, lbsLeft-side View Right-side view Top view Dimensions Weights Detail Dimensions,CCRC/CIRC Air-cooled condenser dimensions & weight, in-lbs CCRC/CIRC -Air-Cooled CondenserCCRC/CIRC Electrical connections, CCRC/CIRC Refrigerant connections,Hot water coil dimensions & weight, in-lbs Hot Water CoilSteam coil dimensions, in-lbs Steam CoilElectric heat coil dimensions & weight, in-lbs Electric Heat CoilFlexible Horizontal Discharge Plenum Waterside economizer weight, in-lbs Waterside EconomizerAirside economizer dimensions & weight, in-lbs Airside EconomizerDetail a Detail B Dimensions Weights VFD Variable Frequency Drive Option VFDControl and LineVoltage Result in death or serious injury Mounting RequirementsElectrical Installation Procedure VFD with bypass dimensions,Variable Frequency Drive with Bypass Mechanical Specifications Duct ConnectionsWater Piping Hazardous Voltage w/Capaci- torsWaterside Piping Arrangements Table I-MR-1. Water Connection SizesBrazing Procedures Refrigerant Piping Air-Cooled Units OnlyHazard of Explosion and Deadly Gases Unit Wiring Diagrams Supply PowerWiringLive Electrical Components Equipment DamageSelection Procedures Installation requirements Pre-Startup ProceduresSupply Fan Isolators Shipping bracketFigure I-PR-3. Correct plenum insulation placement Airside Economizer Installation Unit InstallationField Wiring Connections Unit HandlingStatic PressureTransducer Installation VAV units only Installing theTransducerTransducer Location 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 Hydronic Coil Installation Installation ProcedureUnit Structural Integrity Electric Heat Installation Electric Heat CoilWiring ProcedureTable I-PR-2.Available Electric Heat kW Standard with All IntelliPak Units Zone Sensor Options for IntelliPak Control UnitsCV Unit Zone Sensor Options BAYSENS077* DescriptionCV andVAV Unit Zone Sensor Options VAV Unit Zone Sensor OptionBAYSENS074 Description BAYSENS073 DescriptionZone Sensor Installation WiringMounting Location Mounting the SubbaseRight Mounting Directly to the Wall Mounting to Junction Box ConstantVolume Zone Sensor BAYSENS019 Description Variable AirVolume Zone Sensor BAYSENS020B DescriptionProgrammable Zone Sensors Programmable Zone Sensor Installation Airflows from adjacent zones or other unitsTime Clock Installation Time Clock Installation ChecklistWiring theTimeclock Time Clock OptionRemote Human Interface Panel Installation Human Interface HI PanelRemote Human Interface Panel Location RecommendationsProcedure Mounting the Remote Human Interface RHI PanelWall Mounting the RHI Panel Pre-startup Wiring the Remote Human Interface LowVoltage AC FieldWiring ConnectionsCommunication Link ShieldedTwisted PairWiring 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 Temporary Manual Override Time ButtonKeypad Lockout 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 settingsRemote Panel Indicator Signals From UCM to ZSM Intelligent CopyTo use Intelligent Copy Off FlashingIcon Descriptions Figure I-P-9.BAYSENS019 complete icon displayFigure I-P-10.BAYSENS020 complete icon display Setting theTime Programming theTime Clock OptionProgramming To review and change programsInstallation startup Unit Startup ProceduresPre-Startup Checklist Compressor DamageStartup Log EvaporatorCompressor Amp Draw Water Cooled Units Air Cooled UnitsPoints List RTM Module Points List Gbas ModulePoints List Ecem Module Points List -TracerTMLCI-I ModuleUnit Control Components RTM Module Board Standard on all UnitsTable O-GI-2. RTM sensor resistance vs. temperature VAV Box OptionTable O-GI-3. RTM setpoint analog inputs Human Interface Module Standard on all Units Heat ModuleVentilation Override Module VOM Option 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 ProperWaterTreatmentReturn AirTemperature Sensor Supply Air Temperature SensorSupply Airflow Proving Switches Filter SwitchOperation operation Control Sequences OperationUnoccupied Sequence of Operation Tracer Summit SystemMorning Warmup Cycling Capacity Morning Warmup MWUTimed Override Activation ICS Occupied Sequence Supply Air Setpoint Reset VAV Units Only Mechanical CoolingWater-Cooled Units Only Electric HeatCompressors Compressor Lead/Lag OperationTable O-SO-1. Compressor Stages Step Control Evaporator Coil Frost ProtectionTable O-SO-2. Pressure cutouts Service Valve Option OperationMaintenance information Table M-GI-1. SCWG/SIWG/SCRG/SIRG General Maintenance DataMaintenance procedures Maintenance ProceduresAir Filters Inspecting and Cleaning the Drain Pan Inspecting and Cleaning the FanRemove all standing water Supply Fan Variable Frequency Drive VFDFan Drive Fan Bearings Table M-MP-1. Baldor Fan Bearing Lubrication ScheduleTable M-MP-2.AO Smith Bearing Lubrication Schedule Table M-MP-3. Compatible Fan Bearing GreaseFan BeltTension Deflection = belt span/64Table M-MP-4. Fan shaft bearing torques Adjusting BeltTension BeltRefrigerant System Confined Space HazardsRefrigerant Evacuation Refrigerant LeakTesting Motor Winding DamageUse of Pressure Regulator Valves Gauges R407cMaintenance Coil Fin Cleaning Proper Coil CleaningAgentInlet GuideVanes Coil Freezeup Chemical Cleaning of Condenser and Economizer Coil Flow Switch MaintenanceCleaning the Flow Switch Piping ComponentsMaintenance Periodic Checklists Monthly ChecklistSemi-Annual Maintenance Annual MaintenanceCheck the zone thermostat settings Operating ProceduresCommon Unit Problems and Solutions System ChecksMaintenance diagnostics DiagnosticsHeat Module Auxilliary Temperature Sensor Fail Emergency StopEntering Cond WaterTemp Sensor Fail Entering Water Temp Sensor FailMode Input Failure Low Air Temp Limit TripLow Pressure Control Open Circuit 1, 2, 3, or MCM Communications FailureNSB Panel ZoneTemperature Sensor Failure Check Field/unit wiring between RTM and NSB PanelHumidity Sensor Failure Temp. Sensor FailureRTM Data Storage Error RTM Zone Sensor FailureSupply Fan VFD Bypass Enabled ProblemThe LCI-I has lost communication withTracer SummitSupply Fan Failure LCI-I Module Comm FailureRender all HI keystrokes ineffective VOM Communications FailureWSM Communications Fail 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.
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