Trane BCHC, BCVC manual Maintenance, Fan Assembly Set Screws, Fan Belt Tension, Torque in.-lb Ft-lb

Page 64

Maintenance

sheaves and pull tight. Adjust sheaves and tighten the sheave set screws to the correct torques recommended in Table 31.

Figure 15. Clearance recommendation to

Figure 16. Correct sheave alignment

prevent fan frame and belt interface

 

Table 31. Recommended torques for tightening sheaves and bearing thrust collar

 

Torque (in.-lb)

Ft-lb

N-m

 

 

 

 

Sheave setscrew

144

12

16.3

Bearing thrust collar

66

5.5

7.5

Fan wheel screw

144

12

16.3

 

 

 

 

Fan Assembly Set Screws

Check and adjust fan wheel, bearing, and sheave set screws whenever a component is removed or an adjustment is made. Refer to Table 31 for recommendations.

Fan Belt Tension

Proper belt tension is necessary to endure maximum bearing and drive component life and is based on fan brake horsepower requirements. Replace belt when frayed or worn.

Fan belt tension should only be tight enough so the belt does not slip and maintains adequate airflow.

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.

Be careful not to over-tension fan belt. Excessive tension will reduce fan and motor bearing life, accelerate belt wear and possibly cause shaft failure. Clean the sheaves and belt with a dry cloth. Keep oil and grease away from the belt because they may cause belt deterioration and slippage. Trane does not recommend belt dressing.

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BCXC-SVX01B-EN

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Contents Blower Coil Air Handler AprilEnvironmental Concerns Refrigerant warning informationResponsible Refrigerant Practices Hazard of Explosion and Deadly Gases About This Manual TrademarksTable of Contents BCXC-SVX01B-EN Digit 16 Motor Horsepower Digits 1, 2, 3, 4 Unit ModelDigits 5, 6, 7 Unit Size Digit 8 Unit VoltageModel Number Description General Information Blower Coil General InformationGeneral Information Receiving and Handling Pre-InstallationJobsite Storage Recommendations Installation Preparation Service AccessPre-Installation Unit size Dimension aUnit Handling Procedure Rigging and HandlingImproper Unit Lift Unit Location RecommendationsPre-Installation Checklist Skid RemovalDimensions and Weights Horizontal blower coil dimensions in. and weights lbUnit Size RH LH Weight Horizontal Blower CoilDimensions and Weights Vertical blower coil dimensions in. and weights lbUnit Size Weight Vertical Blower CoilAngle Filter and Mixing Box Angle filter and mixing box dimensions in. and weights lbUnit size Bottom or Top Access Filter Box AIR Flow Filter Filter Access PanelElectric heat dimensions in. and weights lb Electric HeatSteam coil box dimensions in. and weights lb Steam CoilCoil Connections, NPT Supply ReturnCoil Connections Hydronic coil connection sizes, ODDX coil connection sizes, OD Steam coil connection sizes, female connection, NPTPiping Packages Basic PipingDimensions and Weights Deluxe Piping Piping Nominal Actual sizeInstallation Controls Installing Wall Mounted ControlsZone Sensor Installation Wiring InstructionsCommunication Wiring Installation ControlsService Communication Wiring Zone Sensors Without Interconnecting WiringTracer Summit Communication Wiring Installation Electrical Installation Electrical Zone sensor maximum wiring distances, ft mWire size range Max. wiring distance Electrical Grounding Restrictions Hazardous VoltageAvailable electric heat, min-max kW Useful FormulasUnit size Voltage Motor electrical data 220/50/1 240/50/1190/50/3 380/50/3Installation Mechanical Installing the UnitBchc Installation Procedure Horizontal Units, Model BchcInstallation Mechanical Vertical Units, Model BcvcHeating Coil Option Mixing Box OptionLinkage Installation Procedure Mixing Box Installation ProcedureCondensate Drain Connections Recommended drain trap installation for draw-through units Duct ConnectionsInstallation Piping Water Coil ConnectionsPotential coil-freeze condition Refrigerant Coil PipingValve Damage Installation PipingSuction Line Field-Installing Evaporator Piping Field-installed evaporation piping exampleSteam Piping Coil CondensateGeneral Steam CoilsType NS steam coils, horizontal tubes for horizontal airflow Control Options Controls InterfaceTracer Controllers Rover Service Software Controls InterfaceTracer controller input/output summary Tracer controller ZN010 ZN510 ZN520End Device Option Availability Tracer controller function summaryTracer Control Device ZN010 Tracer ZN510 Tracer ZN520 Pre-Start Checklist Pre-StartReceiving Unit LocationPre-Start Component Overview DuctworkUnit Piping ElectricalSequence of Operation Start-UpTracer ZN Controller Sequence of Operation Occupied Mode Unoccupied ModeSensor type Sensor position Unit occupancy mode Start-UpCooling Operation Occupied Standby Mode Tracer ZN510 or ZN520 onlyOccupied Bypass Mode, Tracer ZN510 or ZN520 Only Start-Up Economizer Cooling Tracer ZN520 Only DX Cooling Tracer ZN520 onlyDischarge Air Tempering Tracer ZN520 Only Heating OperationFan Mode Operation Rotating Components Tracer ZN520 fan configurationAuto fan operation Fan speed default Fan sequence of operationFan Speed Switch Tracer ZN010 and ZN510Tracer ZN520 Continuous Fan OperationFan Off Delay Fan mode operation, Tracer ZN010 and ZN510Start-Up Fan Cycling Operation Fan Start on High SpeedEntering Water Temperature Sampling Function Local fan switch enabledTwo- and Four-Pipe Changeover Operation Fan operation in heating and cooling modesUnit mode as related to water temperature Unit type EWT sensor required? Coil water temperatureElectric Heat Operation Economizer Damper Tracer ZN520 OnlyBIP1 Low Temperature Detection Option Tracer Dehumidification Tracer ZN520 OnlyData Sharing Tracer ZN510 or ZN520 Only Binary InputsBinary input configurations BIP2 Condensate Overflow Detection OptionBIP3 Occupancy Sensor BIP4 Fan Status ZN520 OnlyAnalog Inputs Binary OutputsAnalog inputs Analog input Terminal Function Range ZN010 ZN510 ZN520Space Temperature Measurement Binary output configurationZone sensor wiring connections Zone SensorFan Mode Switch External Setpoint AdjustmentFan Switch Local SetpointOn/Cancel Buttons Communication JackMaintenance Maintenance ProceduresMaintenance Fan Assembly Set ScrewsFan Belt Tension Torque in.-lb Ft-lbBelt tension BCBH/BCVC valve package waterflow limitsHydronic coil data BCHC/BCVC coil general dataRow coil Steam coil data Unit Motor Motor sheave Fan sheave Belt Drive data1750 1450 Size Watts Browning Trane 60 Hz 50 Hz Coil Maintenance Potential unit damage from coil cleanersInspecting and Cleaning Coils Steam, Hot Water, and Cooling Coil Cleaning ProcedurePeriodic Maintenance Checklists Rotating partsMaintenance Troubleshooting DiagnosticsLED Activity Manual Output Test Procedure DiagnosticsManual Output Test Diagnostics Translating Multiple DiagnosticsTracer ZN520 test sequence Fan Cool output a Heat output Damper Steps J1-1, J1-3Resetting Diagnostics Automatic Reset by the ControllerDiagnostics Manual Output Test Cycling PowerRover Service Tool Diagnostic Reset Tracer ZN510 or ZN520 OnlyTracer ZN010 and ZN510 controller diagnostics Tracer ZN520 diagnosticsDiagnostic Latching Fan Valves Electric heat Damper Diagnostic Fan Other outputsaCommon Diagnostics Fan outputs do not energizeValves stay closed Probably cause ExplanationElectric heat not operating Valves stay openFresh air damper stays closed Fresh air damper stays open DX or electric outputs do not energizeWiring Diagrams Two-Pipe Bcxc with Tracer ZN510Wiring Diagrams Four-Pipe Bcxc with Tracer ZN510Four-Pipe Bcxc with Tracer ZN510 Two-Pipe Bcxc with Tracer ZN520 Four-Pipe Bcxc with Tracer ZN520 Four-Pipe Bcxc with Tracer ZN520 Four-Pipe Bcxc with Tracer ZN520 Four-Pipe Bcxc with Control Interface Four-Pipe Bcxc with Control Interface Field Installed Device Bcxc with DX Coil and Tracer ZN520Bcxc with DX Coil, Hydronic Heating, and Tracer ZN520 BCXC-SVX01B-EN
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