Trane BCXC-SVX01B-EN, BCVC, BCHC manual Fan Speed Switch, Tracer ZN010 and ZN510, Tracer ZN520

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Start-Up

Additional flexibility built into the controller allows you to enable or disable the local fan switch input. The fan mode request can be hardwired to any of the Tracer™ ZN controllers or communicated to the Tracer ZN510 or ZN520 controller. When both inputs are present, the communicated request has priority over the hardwired input. See Table 19, p. 52.

Fan Speed Switch

Off. Fan is turned off, two-position damper option spring-returns closed.

High or Low. Fan runs continuously at the selected speed. The two-position damper option opens to an adjustable mechanical stop-position.

Tracer ZN010 and ZN510

Off. Fan is off; control valves and fresh air damper option close. Low air temperature detection option is still active.

Auto (Fan Cycling). Fan and fresh air damper cycle with control valve option to maintain setpoint temperature. If the unit has a 2-speed fan, in cooling mode the fan cycles from off to high and in heating mode it cycles from off to low (factory default that can be field-adjusted using Rover™ service software). When no heating or cooling is required, the fan is off and the fresh air damper option closes. Units with 2-speed fans can also be field-configured using Rover to run at a defined speed when the fan speed switch is in the auto position.

Low or High (Continuous Fan). Fan operates continuously while control valve option cycles to maintain setpoint temperature. Fresh air damper option is open.

Tracer ZN520

Off. Fan is off; control valve options and fresh air damper options close. The low air temperature detection option is still active.

Auto. Fan speed control in the auto setting allows the modulating (three-wire floating point) control valve option and single or two-speed fan to work cooperatively to meet precise capacity requirements, while minimizing fan speed (motor/energy/acoustics) and valve position (pump energy/chilled water reset). As the capacity requirement increases at low fan speed, the water valve opens. When the low fan speed capacity switch point is reached, the fan switches to high speed and the water valve repositions to maintain an equivalent capacity. The reverse sequence takes place with a decrease in required capacity.

Units with 2-speed fans on low or high. The fan will run continuously at the selected speed and the valve option will cycle to meet setpoint.

Continuous Fan Operation

During occupied and occupied standby modes, the fan normally is on. For multiple speed fan applications, the fan normally operates at the selected or default speed (off, high, or low). When fan mode is auto, the fan operates at the default fan speed.

During unoccupied mode, the fan is off. While unoccupied, the controller will heat or cool to maintain the unoccupied heating and cooling setpoints. In unoccupied mode, the fan runs on high speed only, with heating or cooling. See Table 24, p. 55.

The unit fan is always off during occupied, occupied standby, and unoccupied modes when the unit is off due to a diagnostic or when the unit is in the off mode due to the local zone sensor module, a communicated request, or the default fan speed (off).

If both a zone sensor module and communicated request exist, the communicated request has priority. See Table 23, p. 55.

BCXC-SVX01B-EN

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Contents April Blower Coil Air HandlerResponsible Refrigerant Practices Refrigerant warning informationEnvironmental Concerns Hazard of Explosion and Deadly Gases Trademarks About This ManualTable of Contents BCXC-SVX01B-EN Digits 1, 2, 3, 4 Unit Model Digit 16 Motor HorsepowerDigits 5, 6, 7 Unit Size Digit 8 Unit VoltageModel Number Description Blower Coil General Information General InformationGeneral Information Jobsite Storage Recommendations Pre-InstallationReceiving and Handling Service Access Installation PreparationPre-Installation Unit size Dimension aRigging and Handling Unit Handling ProcedureImproper Unit Lift Unit Location RecommendationsSkid Removal Pre-Installation ChecklistHorizontal blower coil dimensions in. and weights lb Dimensions and WeightsUnit Size RH LH Weight Horizontal Blower CoilVertical blower coil dimensions in. and weights lb Dimensions and WeightsUnit Size Weight Vertical Blower CoilUnit size Angle filter and mixing box dimensions in. and weights lbAngle Filter and Mixing Box AIR Flow Filter Filter Access Panel Bottom or Top Access Filter BoxElectric Heat Electric heat dimensions in. and weights lbSteam Coil Steam coil box dimensions in. and weights lbCoil Connections, NPT Supply ReturnHydronic coil connection sizes, OD Coil ConnectionsDX coil connection sizes, OD Steam coil connection sizes, female connection, NPTBasic Piping Piping PackagesDimensions and Weights Deluxe Piping Actual size Piping NominalInstalling Wall Mounted Controls Installation ControlsZone Sensor Installation Wiring InstructionsInstallation Controls Communication WiringService Communication Wiring Zone Sensors Without Interconnecting WiringTracer Summit Communication Wiring Installation Electrical Zone sensor maximum wiring distances, ft m Installation ElectricalWire size range Max. wiring distance Electrical Grounding Restrictions Hazardous VoltageUnit size Voltage Useful FormulasAvailable electric heat, min-max kW Motor electrical data 240/50/1 220/50/1190/50/3 380/50/3Installing the Unit Installation MechanicalBchc Installation Procedure Horizontal Units, Model BchcVertical Units, Model Bcvc Installation MechanicalMixing Box Option Heating Coil OptionCondensate Drain Connections Mixing Box Installation ProcedureLinkage Installation Procedure Duct Connections Recommended drain trap installation for draw-through unitsWater Coil Connections Installation PipingPotential coil-freeze condition Refrigerant Coil PipingSuction Line Installation PipingValve Damage Field-installed evaporation piping example Field-Installing Evaporator PipingCoil Condensate Steam PipingGeneral Steam CoilsType NS steam coils, horizontal tubes for horizontal airflow Tracer Controllers Controls InterfaceControl Options Controls Interface Rover Service SoftwareTracer controller input/output summary Tracer controller ZN010 ZN510 ZN520Tracer Control Device ZN010 Tracer ZN510 Tracer ZN520 Tracer controller function summaryEnd Device Option Availability Pre-Start Pre-Start ChecklistReceiving Unit LocationDuctwork Pre-Start Component OverviewUnit Piping ElectricalTracer ZN Controller Sequence of Operation Start-UpSequence of Operation Unoccupied Mode Occupied ModeSensor type Sensor position Unit occupancy mode Start-UpOccupied Bypass Mode, Tracer ZN510 or ZN520 Only Occupied Standby Mode Tracer ZN510 or ZN520 onlyCooling Operation DX Cooling Tracer ZN520 only Start-Up Economizer Cooling Tracer ZN520 OnlyDischarge Air Tempering Tracer ZN520 Only Heating OperationTracer ZN520 fan configuration Fan Mode Operation Rotating ComponentsAuto fan operation Fan speed default Fan sequence of operationTracer ZN010 and ZN510 Fan Speed SwitchTracer ZN520 Continuous Fan OperationFan mode operation, Tracer ZN010 and ZN510 Fan Off DelayStart-Up Fan Cycling Operation Fan Start on High SpeedLocal fan switch enabled Entering Water Temperature Sampling FunctionTwo- and Four-Pipe Changeover Operation Fan operation in heating and cooling modesUnit type EWT sensor required? Coil water temperature Unit mode as related to water temperatureElectric Heat Operation Economizer Damper Tracer ZN520 OnlyTracer Dehumidification Tracer ZN520 Only BIP1 Low Temperature Detection OptionData Sharing Tracer ZN510 or ZN520 Only Binary InputsBIP2 Condensate Overflow Detection Option Binary input configurationsBIP3 Occupancy Sensor BIP4 Fan Status ZN520 OnlyBinary Outputs Analog InputsAnalog inputs Analog input Terminal Function Range ZN010 ZN510 ZN520Binary output configuration Space Temperature MeasurementZone sensor wiring connections Zone SensorExternal Setpoint Adjustment Fan Mode SwitchFan Switch Local SetpointCommunication Jack On/Cancel ButtonsMaintenance Procedures MaintenanceFan Assembly Set Screws MaintenanceFan Belt Tension Torque in.-lb Ft-lbBCBH/BCVC valve package waterflow limits Belt tensionRow coil BCHC/BCVC coil general dataHydronic coil data Steam coil data 1750 1450 Size Watts Browning Trane 60 Hz 50 Hz Drive dataUnit Motor Motor sheave Fan sheave Belt Potential unit damage from coil cleaners Coil MaintenanceInspecting and Cleaning Coils Steam, Hot Water, and Cooling Coil Cleaning ProcedureRotating parts Periodic Maintenance ChecklistsMaintenance LED Activity DiagnosticsTroubleshooting Manual Output Test DiagnosticsManual Output Test Procedure Translating Multiple Diagnostics DiagnosticsTracer ZN520 test sequence Fan Cool output a Heat output Damper Steps J1-1, J1-3Automatic Reset by the Controller Resetting DiagnosticsCycling Power Diagnostics Manual Output TestRover Service Tool Diagnostic Reset Tracer ZN510 or ZN520 OnlyTracer ZN520 diagnostics Tracer ZN010 and ZN510 controller diagnosticsDiagnostic Latching Fan Valves Electric heat Damper Diagnostic Fan Other outputsaFan outputs do not energize Common DiagnosticsValves stay closed Probably cause ExplanationFresh air damper stays closed Valves stay openElectric heat not operating DX or electric outputs do not energize Fresh air damper stays openTwo-Pipe Bcxc with Tracer ZN510 Wiring DiagramsFour-Pipe Bcxc with Tracer ZN510 Wiring DiagramsFour-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 Bcxc with DX Coil and Tracer ZN520 Field Installed DeviceBcxc with DX Coil, Hydronic Heating, and Tracer ZN520 BCXC-SVX01B-EN