Single-Duct Table of Contents - trane.com

1 Single-DuctSD 1 VAV-PRC008-ENTable ofContentsService Model Number DescriptionSD 2 3 Selection ProcedureSD 4 5 General Data Valve/Controller Airflow GuidelinesSD 6 Performance Data Air Pressure RequirementsSD 7 9 Performance Data Hot Water CoilSD 10 15 Performance Data Electric DataSD 16 17 Performance Data AcousticsSD 18 21 Dimensional DataSD 22 27 Mechanical SpecificationsSD 28 30 Single-DuctVAV-PRC008-ENSD 2 ServiceModel NumberDescriptionSingle-Duct VAVT erminal UnitsThe features of the Single-Duct VAVterminal units are described by theproduct categories shown in each category the availableoptions are 1, 2 Unit TypeVCVariTrane single-ductDigit 3 ReheatCCooling OnlyEElectric HeatWHot Water HeatDigit 4 Development SequenceFSixthDigit 5, 6 Primary Air Valve044" inlet (225 cfm)055" inlet (350 cfm)066" inlet (500 cfm)088" inlet (900 cfm)1010" inlet (1400 cfm)1212" inlet (2000 cfm)1414" inlet (3000 cfm)1616" inlet (4000 cfm)2424" x 16" inlet (8000 cfm)Digit 7, 8 Not Used00N/ADigit 9 Not Used0N/ADigit 10, 11 Design SequenceC0 Third (factory assigned)

2 Digit 12, 13, 14, 15 ControlsENON No controls, field-installed DDC/electricPNON No controls, field-installedpneumaticDD00 trane elec actuator onlyDD01 DDC Cooling onlyDD02 DDC on/off water valvecontrolDD03 DDC Prop hot water valvecontrolDD04 DDC On/off electric heatDD05 DDC Pulse-width modulationelectric heatDD07 DDC on/off water valvecontrolDD11 LonTalk DDC Controller Cooling onlyDD12 LonTalk DDC Controller w/ hot water controlDD13 LonTalk DDC Controller w/proportional hot water controlDD14 LonTalk DDC Controller on/offelectric heat controlDD15 LonTalk DDC Controller w/pulse-width modulation electricheat controlDD17 LonTalk DDC Controller w/ hot water controlAT08FM Automated Logic ZN341v+AT10FM Automated Logic ZN141v+FM00 FM Customer-suppliedactuator &

3 ControllerFM01FM trane actuator w/customer-supplied controlHNY2 FM Honeywell W7751 HINV3FM Invensys MNL-V2 RPWR1 FM Siemens 540-100 actuatorPWR2 FM Siemens 540-103 actuatorPW12 FM Siemens 550-065PW13 FM Siemens 550-067 VMA2 FM Johnson VMA-1420EI05 Analog With optional on/offreheatEI28 Analog With optional on/offreheat with dual-minimum cfmEI29 Analog With optional on/offreheat with constant-volume cfmPC00PN trane pneumaticactuatorPC04PN with optional on/off HW,DA StatPC05PN with optional on/offelectric, RA StatPN00PN trane pneumaticactuator, RA StatPN04PN PVR, DA StatPN05PN PVR, RA StatPN11PN dual-minimum cfm,DA StatPN32PN Water Valve, constantvolume, DA StatPN34PN Electric heat, constantvolume, DA = =Normally-openedDA Stat =Direct-acting pneumatic t-stat (byothers)RA Stat =Reverse-acting pneumatict-stat (by others)

4 PN =PneumaticFM =Factory installation of customer-supplied controllerPVR =Pneumatic Volume RegulatorVCCFVCWFVCEFS ingle-DuctSD 3 VAV-PRC008-ENDigit 27, 28, 29 Electric Heat kW01 kW460 to kW kW to kW 1 kW to kW 2 kW incrementsDigit 30 Electric Heat Stages0 None11 Stage22 Stages Equal33 Stages EqualDigit 31 Contactors0 None124-volt magnetic224-volt mercury3PE with magnetic4PE with mercuryDigit 32 Not Used0N/ADigit 33 Not Used0N/ADigit 34 Actuator0 StandardASpring Return (Normally Open)BSpring Return (NormallyClosed)Digit 35 Sensor Options0 Standard (Wired)1 Factory Mounted WirelessReceiver (Sensor Accessory)ServiceModel NumberDescriptionDigit 16 InsulationA1/2" Matte-facedB1" Matte-facedC1/2" Foil-facedD1" Foil-facedF1" Double-wallG3/8" Closed-cellDigit 17 Not Used0N/ADigit 18 Not Used0N/ADigit 19 Outlet Plenum (Connectionis Slip & Drive)0 NoneA1 Outlet RHB1 Outlet ENDC1 Outlet LHD2 Outlets, 1 RH, 1 ENDE2 Outlets, 1 LH, 1 ENDF2 Outlets, 1 RH, 1 LHH3 Outlets, 1 LH, 1 RH, 1 ENDJ4 Outlets, 1 LH, 1 RH, 2 ENDNote.

5 See unit drawings for outlet sizes/damper 20 Not Used0N/ADigit 21 Water Coil0 None11-Row22-RowDigit 22 Electrical Connections (VCCF,VCWF can be flipped in the field toachieve opposite-hand connection)LLeft (Airflow hitting you in theface)RRight (Airflow hitting you in theface)0 Opposite side connection coiland controlDigit 23 Transformer0 None1120/24 volt (50 VA)2208/24 volt (50 VA)3240/24 volt (50 VA)4277/24 volt (50 VA)5480/24 volt (50 VA)6347/24 Volt (50 VA)7575/24 Volt (50 VA)8380/24 Volt (50 VA)Note: For VCEF units with transformersthe VA depends on the staging, control,and contactor type (ranges are 40 VAto 75 VA)Digit 24 Disconnect Switch0 NoneWWithNote: VCCF, VCWF Toggle DisconnectVCEF Door Interlocking PowerDisconnectDigit 25 Power Fuse0 NoneWWithDigit 26 Electric Heat Voltage0 NoneA208/60/1B208/60/3C240/60/1D277/60/1 E480/60/1F480/60/3G347/60/1H575/60/3J380 /50/3K120/60/1 Single-DuctVAV-PRC008-ENSD 4 SelectionProcedureThis section describes the catalogselection of Single-Duct VAV terminalunits with specific examples.

6 Acomputer selection program is alsoavailable to aid in selection of VAVterminal of Single-Duct VAV terminalunits can involve three elements: Air valve selection Heating coil selection (if required) AcousticsAir Valve SelectionThe wide-open static pressure andairflows are found in the performancedata section of the catalog. To select anair valve, locate the required designcooling airflow for your terminal unittype and find the smallest air valve sizethat has a pressure drop equal to orlower than the maximum wide-openstatic pressure Example Cooling Only VCCF Terminal UnitDesign cooling airflow:1700 cfmMaximum wide openAir pressure in. wgMinimum cooling airflow: 850 cfmFrom the performance data charts,select a valve size 12, which has a wide-open static pressure drop of in.

7 WgCheck the minimum and maximum cfmdesired with the minimum andmaximum cfm allowed in the Table inthe general data section. The maximumsetting of 1700 cfm is within theacceptable range. The desired minimumsetting of 850 cfm is acceptable for thecooling only box desired. Note that if anelectric reheat box was selected, theminimum cfm would be dependentupon the kW of the electric heater. (SeeElectric Heat Unit Selection.)Heating Coil Selection (Ifrequired)First, determine the amount of heatrequired to meet space anddownstream duct heat losses from aload Water HeatSelect a hot water coil sufficient to meetthe design heat :VCWF, Hot Water Unit Heat, Size 12(See air Valve Selection)Heating airflow:850 cfmHot water gpmDesign Heat Loss:Q =25 MBhSelect hot water coil from the coilperformance Table in the PerformanceData section of the :A one-row coil is sufficient to meetdesign conditions.

8 From the Hot WaterCoil Capacity Data of the PerformanceData Section, a one-row coil for a size12 air valve will operate at the aboveconditions as follows:Coil MBhWater pressure ft WPDAir pressure drop (APD) of the hotwater coil is included in the chartpreceding the hot water coilperformance data = in. wgElectric HeatDetermine the kW required to meetzone design heat = MBh / = Design Heat LossSelect the nearest available kW withvoltage and steps desired from theelectric heater kW guideline Table in thePerformance Data section of :VCEF, Electric Unit Heat, Size 12(See Air Valve Selection)Heating airflow:850 cfmVoltage:277/60/1 VACD esign Heat Loss:Q = 25 MBhkW = = 25 = :Select kW from the electric heattable in the voltage and stagesrequired.

9 The Table shows theminimum cfm allowable for the kWselected. The static pressurerequirement is shown as in. wgfor this example with a design coolingflow of 1700 Leaving Air Temperature:T is the primary entering airtemperature 55 F for this if leaving air temperature F is satisfactory for acoustical data found in the"Performance Data" section of the VAVcatalog is used to make adetermination of the amount of noisethe terminal unit will generate. Locatethe Table for the VAV terminal unit ofinterest. Sound power data and anequivalent NC level for an ARI 885-98transfer function is :VCCF, Cooling-Only Terminal Unit, Size10 (See air Valve Selection)Cooling Airflow:1100 cfmMaximum inlet in. wgInterpolation gives sound powerdata of:LAT = 3414 x x 850+ 55 = = x CFM+ TThe maximum NC level is NC-37.

10 If themaximum NC level was exceeded, itwould have been necessary to reselectthe next larger unit SelectionThe advent of personal computers hasserved to automate many processesthat were previously repetitive andtime-consuming. One of those tasks isthe proper scheduling, sizing, andselection of VAV terminal units. Tranehas developed a computer program toperform these tasks. The software iscalled the trane Official ProductSelection System (TOPSS).The TOPSS program will take the inputspecifications and output the properlysized VariTrane VAV terminal unit alongwith the specific performance for thatsize program has several requiredfields, denoted by red shading in theTOPSS screen, and many otheroptional fields to meet the criteria youhave.