Trane VariTrac Dampers Detailliste

Tracker System — CBVariTrac™ — Changeover Bypass VAVMarch 2012 VAV-PRC003-ENCommunicatingBypass ControllerHVAC UnitBypass DamperVariTrac Central Contr

10 VAV-PRC003-ENFeatures and BenefitsUnit Control Module A unit control module (UCM) is the individual zone controller for the VariTrac air damper an

VAV-PRC003-EN 11Features and BenefitsCO2 SensorWall- and duct-mounted carbon dioxide (CO2) sensors are designed for demand-controlled ventilation zone

12 VAV-PRC003-ENFeatures and Benefits• Adjustable sensitivity• SPDT isolated contacts connect to UCM input Auxiliary Temperature Sensor Installed Tem

VAV-PRC003-EN 13Application ConsiderationsIntroductionThe VariTrac system is a changeover-bypass VAV system. One fan supplies either warm air for hea

14 VAV-PRC003-ENApplication Considerations• Building layout, design, occupancy and occupancy pattern throughout the day and year• Activities in each

VAV-PRC003-EN 15Application ConsiderationsStep 1. Define occupant comfort needsThe design process begins by considering the needs of building occupant

16 VAV-PRC003-ENApplication Considerations• Interior partitions and doors• Varying loads from equipment or processesLet’s examine a few building exam

VAV-PRC003-EN 17Application ConsiderationsStep 3. Define the Comfort ZonesA primary criteria for defining a thermal zone is that it will not require s

18 VAV-PRC003-ENApplication ConsiderationsWhile using diversity may reduce the size of the HVAC unit, the zone ductwork, dampers, and diffusers must

VAV-PRC003-EN 19Application ConsiderationsStep 5. Size Zone and Bypass Damper UnitsSizing zone damper is relatively straightforward. The volume of ai

© 2012 Trane All rights reserved VAV-PRC003-ENIntroductionComfort Made SimpleTrane has a long history of innovative leadership in variable air volu

20 VAV-PRC003-ENApplication ConsiderationsA robust system and zone unit controller, like the Trane VariTrac system, will compensate for system static

VAV-PRC003-EN 21Application ConsiderationsPressure Dependent vs. Pressure IndependentPressure-DependentA pressure-dependent VAV control sequence uses

22 VAV-PRC003-ENApplication ConsiderationsVariTrane units with integral electric or hot water heat are available as:•Single-duct• Parallel fan-powere

VAV-PRC003-EN 23Application ConsiderationsLocal reheat is particularly important when an HVAC unit is in cooling mode. Cold air is delivered to all zo

24 VAV-PRC003-ENApplication ConsiderationsProper operation requires consideration of all aspects of bypass design and location. The bypass dampers an

VAV-PRC003-EN 25Application Considerationsand airflow through the supply fan. As the outside air damper opens to provide economizer cooling, the retur

26 VAV-PRC003-ENApplication ConsiderationsTip 3. Use Local HeatZones which vary thermally by requiring more heat than the other zones or require hea

VAV-PRC003-EN 27Selection ProceduresVariTrac Dampers VariTrac dampers are typically installed on VariTrac changeover bypass variable air volume (VAV)

28 VAV-PRC003-ENSelection ProceduresTable 3. Rectangular zone damper: capacity (cfm), dimensions, blades, and weightsVelocity (fpm)Size8 x 12 8 x 14

VAV-PRC003-EN 29Selection ProceduresFigure 27. Typical VariTrac changeover-bypass VAV system componentsDevice Name Function in System Number RequiredA

Table of ContentsVAV-PRC003-EN 3Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

30 VAV-PRC003-ENDigit 1, 2, 3, 4 — Product TypeVADB= VariTrac Air DamperVARA= Rectangular Air DamperDigit 5, 6 — VariTrac Damper Size06 = 6" Da

VAV-PRC003-EN 31Electrical Data and ConnectionsFigure 29. Central control panel field wiring24 VacLine voltageComm5linkComm5linkComm5 UCMTrackerSplice

32 VAV-PRC003-ENElectrical Data and ConnectionsFigure 30. Relay board wiring13291215R5134810111467TB1Relay Board TB2cRhGY1Y2W1W2/0AUXNONCNOT USED24 V

VAV-PRC003-EN 33Electrical Data and ConnectionsFigure 32. UCM comm link wiringVariTracTermination Board TB2StaticPressure Port+VOUT–Air SupplyTe mp.

34 VAV-PRC003-ENElectrical Data and ConnectionsFigure 33. Communicating bypass controller wiringCWACTUATORHOTCLOSECCW OPENCOMSPARECONNECTORACTUATORTB

VAV-PRC003-EN 35Electrical Data and ConnectionsFigure 34. UCM wiring24 VAC 60 HZNEC CLASS–2CONTROL CIRCUIT8.WGWRDAMPERACTUATORWIRINGD.D.C. \ U.CM.CONT

36 VAV-PRC003-ENElectrical Data and ConnectionsFigure 35. DDC zone sensor with LCDDigital SensorTerminal Connection ChartSensorUCMField WireColor Cod

VAV-PRC003-EN 37SpecificationsTable 6. Zone sensor optionsZone Sensor Options Number of Required Wires(a)Sensor only (no communications jack available

38 VAV-PRC003-ENSpecificationsTable 10. Zone occupancy sensor specificationsPower Supply 24 Vac or 24 Vdc, ±10%Maximum VA Load 0.88 VA @ 24 Vac, 0.72

VAV-PRC003-EN 39AcousticsAcoustics are tricky to define for specific jobsites. To provide an acoustical overview of a typical office system with miner

4 VAV-PRC003-ENFeatures and BenefitsFigure 3. VariTrac changeover-bypass VAV system componentsCommunicatingBypass ControllerHVAC UnitBypass DamperVar

40 VAV-PRC003-ENAcousticsTable 15. Discharge sound power (dB)1,2,4Inlet Size (in)0.5” Inlet Pressure Ps51.0” Inlet Pressure Ps51.5” Inlet Pressure

VAV-PRC003-EN 41AcousticsTable 16. Radiated sound power (dB)1,2,4Inlet Size (in)0.5” Inlet Pressure Ps51.0” Inlet Pressure Ps51.5” Inlet Pressure P

42 VAV-PRC003-ENAcousticsTable 17. Sound noise criteria (NC) - valve onlyInlet Size (in)Discharge1,2,4Radiated1,2,4Inlet Pressure (Ps)3,5Inlet Press

VAV-PRC003-EN 43Dimensions and WeightsNote: Central control panel weight is 2.5 lbs.Figure 37. Central control panel dimensionsFront viewSide view8.75

44 VAV-PRC003-ENDimensions and WeightsFigure 38. Communicating bypass control dimensionsMounting holesSee back view for dimensions4 1/4"1 15/16&

VAV-PRC003-EN 45Dimensions and WeightsFigure 39. Round zone and bypass damper dimensions

46 VAV-PRC003-ENDimensions and WeightsFigure 40. Rectangular zone damper dimensions

VAV-PRC003-EN 47Dimensions and WeightsFigure 41. Rectangular bypass damper dimensions

48 VAV-PRC003-ENDimensions and WeightsFigure 42. Occupancy sensor (L), CO2 sensor dimensions (R, Top), and digital zone sensor (R, Bottom)3.60"1

VAV-PRC003-EN 49GlossaryBBack Draft DamperA one-way airflow damper in a parallel fan powered unit prevents primary flow from exiting the plenem inlet.

VAV-PRC003-EN 5Features and BenefitsOverviewChangeover-bypass VAV is a comfort system developed for light commercial applications. A changeover-bypas

50 VAV-PRC003-ENGlossaryLLCDLiquid crystal display.NNDIRNon-dispersive infrared technology.Negative PressureThe condition that exists when more air i

VAV-PRC003-EN 51GlossarySPDTA relay with of one set of normally-open, normally-closed contacts.Staged Electric ReheatReheat that operates one or more

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, theleader in creating and sustaining safe, comf

6 VAV-PRC003-ENFeatures and BenefitsCentral Control PanelThe VariTrac central control panel (CCP) serves as the central source of communications and

VAV-PRC003-EN 7Features and BenefitsOperator Display Feature Summary• Backlit LCD touch-screen display for easy operator interface.• Combination of ic

8 VAV-PRC003-ENFeatures and Benefits• LCD touch-screen operator display or Tracker PC software interface provides single-point building management by

VAV-PRC003-EN 9Features and Benefits• Rated up to 2400 fpm at 1.75" of static pressure.Rectangular Bypass Damper Summary• Rectangular bypass damp