Trane BCVC, BCHC, BCXC-SVX01B-EN manual Start-Up, Tracer ZN Controller Sequence of Operation

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Start-Up

Sequence of Operation

Tracer ZN Controller Sequence of Operation

Controller Start-Up

Refer to Trane publication CNT-SVX04A-EN, Installation, Operation, and Programming Guide, to operate the Tracer™ ZN controller with Trane Integrated Comfort™ System (ICS). The factory pre- programs the Tracer ZN controller with default values to control the temperature and unit airflow. Use Tracer Summit® building automation system or Rover™ software to change the default values.

Follow the procedure below to operate the Tracer™ ZN controller in a stand-alone operation:

1.Turn power on at the disconnect switch option.

2.Position the fan mode switch to either high, low, or the auto position.

3.Rotate the setpoint dial on the zone sensor module to 55°F for cooling or 85°F for heating.

The appropriate control valve will actuate assuming the following conditions:

1.Room temperature should be greater than 55°F and less than 85°F.

2.For a two-pipe unit with an automatic changeover sensor, the water temperature input is appropriate for the demand placed on the unit. For example, cooling operation is requested and cold water (5° lower than room temperature) flows into the unit.

3.Select the correct temperature setpoint.

Note: Select and enable zone sensor temperature settings to prevent freeze damage to unit.

Power-Up Sequence

When 24 VAC power is initially applied to the Tracer™ ZN controller, the following sequence occurs:

all outputs are controlled off

Tracer reads all input values to determine initial values,

the random start time (0–25 seconds) expires, and

normal operation begins.

Tracer ZN Modes of Operation

Tracer™ ZN controllers operate the fan in one of the modes listed below as noted:

occupied

unoccupied

occupied standby (Tracer ZN510 or ZN520 only)

occupied bypass

Tracer Summit® with supply fan control (Tracer ZN510 or ZN520 only)

Note: The Tracer™ ZN520 controller operates the supply fan continuously when the controller is in the occupied and occupied standby modes, for either heating or cooling. The controller only cycles the fan off with heating and cooling capacity in the unoccupied mode.

When the communicated occupancy request is unoccupied, the occupancy binary input (if present) does not affect the controller’s occupancy. When the communicated occupancy request is occupied, the controller uses the local occupancy binary input to switch between the occupied and occupied standby modes.

Occupancy Sources

There are four ways to control the Tracer™ ZN controller’s occupancy, as noted below:

1.By pressing the zone sensor’s timed override “on” button

2.Occupancy binary input, either normally open or normally closed, see Table 18 for occupancy sensor states

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BCXC-SVX01B-EN

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Contents Blower Coil Air Handler AprilRefrigerant warning information Environmental ConcernsResponsible 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 Pre-Installation Receiving and HandlingJobsite 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 dimensions in. and weights lb Angle Filter and Mixing BoxUnit 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 VoltageUseful Formulas Available electric heat, min-max kWUnit 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 OptionMixing Box Installation Procedure Linkage Installation ProcedureCondensate Drain Connections Recommended drain trap installation for draw-through units Duct ConnectionsInstallation Piping Water Coil ConnectionsPotential coil-freeze condition Refrigerant Coil PipingInstallation Piping Valve DamageSuction Line Field-Installing Evaporator Piping Field-installed evaporation piping exampleSteam Piping Coil CondensateGeneral Steam CoilsType NS steam coils, horizontal tubes for horizontal airflow Controls Interface Control OptionsTracer Controllers Rover Service Software Controls InterfaceTracer controller input/output summary Tracer controller ZN010 ZN510 ZN520Tracer controller function summary End Device Option AvailabilityTracer Control Device ZN010 Tracer ZN510 Tracer ZN520 Pre-Start Checklist Pre-StartReceiving Unit LocationPre-Start Component Overview DuctworkUnit Piping ElectricalStart-Up Sequence of OperationTracer ZN Controller Sequence of Operation Occupied Mode Unoccupied ModeSensor type Sensor position Unit occupancy mode Start-UpOccupied Standby Mode Tracer ZN510 or ZN520 only Cooling OperationOccupied 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 limitsBCHC/BCVC coil general data Hydronic coil dataRow coil Steam coil data Drive data Unit Motor Motor sheave Fan sheave Belt1750 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 Diagnostics TroubleshootingLED Activity Diagnostics Manual Output Test ProcedureManual 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 ExplanationValves stay open Electric heat not operatingFresh 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