TERMINAL UNITS - Price Industries

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DUAL DUCTTERMINAL UNITSINSTALLATION MANUALDate: 06 / 13Reference # : F-61www.price-hvac.com

GeneralPrice Dual Duct Terminals are available with pneumatic, electronic or direct digital controls (DDC) for variableor constant volume operation. In most cases, pneumatic and electronic controls are factory supplied andmounted. In the case of DDC controls, they are often supplied by the controls contractor and either factory orfield mounted. For information concerning controls, components, sequence of operations, etc. for DDC controlssupplied by the controls contractor, please refer to the documentation provided by the controls contractor.Damper rotation is always counter clockwise to the closed position. An identification mark on the end of theshaft indicates the damper position.Capped tees are provided in the sensing lines from the amplifying sensor for pneumatic controls. These allowfor field connections to a differential pressure gauge for accurate air flow measurement. (Not applicable withelectronic controls.) The factory supplied sensing lines are color coded. Red indicates the total pressure or “HI”line, which should be connected to the upstream nipple on the sensor. Green indicates the static pressure or“LO” line, which should be connected to the downstream nipple on the sensor.For electronic and digital controls, a controls enclosure may be provided to house the terminal controlcomponents. The enclosure’s cover is removable with two sheet metal screws. A protective shroud may beprovided for pneumatic units to protect the controls from damage in shipping.The velocity sensors are normally supplied with the terminal unit. However, in some cases a flow sensingdevice supplied by a controls contractor may be factory or field mounted. Refer to the submittal drawing forillustration.Pneumatic ControllerMulti-PointAirflow SensorSlot IndicatingDamper PositionPneumaticActuatorModel DPS8000 IllustratedReceiving InspectionAll Price Dual DuctTerminals are inspected prior to shipping. After unpacking the assembly, check it for damage.If any damage to the products is found, report it immediately to the delivery carrier. During unpacking andinstallation, do not handle the unit by the inlet or discharge velocity sensors.Inspect the seams of the unit and add additional caulking as needed.WARNING: DO NOT TAMPER WITH THE CONTROL COMPONENTS Copyright E.H. Price Limited 20113

Product KeyDXX X000Controller TypeP -- PneumaticE -- ElectronicD -- DigitalConfigurationS -- StandardQ -- Quiet - c/w 36"Sound AttenuatorUQ -- Ultra Quiet with dischargesilencer includedV -- Variable Volumeno mixingM -- High mixingFlow Sensor OrientationPrimary Air Control5 -- DDC Controls supplied by others8 -- Pressure Independent Controlsby PriceDxS, DxQ, DxUQ and DxM SeriesDxS, DxQ, DxUQ and DxM Series are supplied withSP300 flow sensors on both inlet ducts and onedownstream total flow sensor at the discharge.For pneumatic and electronic sequences the cold deckinlet sensor and downstream total flow sensors areutilized for all standard constant and variable volumeconfigurations. The hot deck inlet sensor is not used.Where DDC controls are supplied by the controlscontractor for factory or field mounting, the appropriatesensors required will depend on the model of controlsand application. To accommodate all variationsand allow future field modification, both inlet anddownstream sensors are supplied as standard.DxV series is not meant for constant volume applicationsso air flow sensors are only supplied at both inlets andnone on the discharge end.4DxV Series Copyright E.H. Price Limited 2011

InstallationElectrical ConnectionMounting the Unit1.Use the support method for rectangular ductdescribed in the job specifications.2.Price Dual Duct terminal units are designed tobe mounted in the direction indicated by theControl Assembly Label found on either side ofthe terminal.3.Do not install tight to slab and avoid contactwith other obstacles such as rigid conduit andsprinkler piping. This can cause vibration andnoise transmission.4.Install the unit in a location that allows free accessto the unit as well as all control components.5.Ensure main power to the terminal has beendisconnected prior to performing any electricalwork or inspecting of the circuitry. (Not applicablefor pneumatic units.)CAUTION: DISCONNECT ALL INCOMING POWERBEFORE ANY ELECTRICAL INSTALLATION ORSERVICE IS PERFORMED ON THE UNIT(S).1.All field wiring is to be in accordance with theNational Electrical Code ANSI/NFPA No. 70-1990 orthe Canadian Electrical Code, Part 1, CSA StandardC 22.1-1990.2.Check voltage requirements prior to power supplyconnection. Refer to the electrical label locatednear the electrical control box.3.Refer to the control diagram supplied with each unitfor field wiring of thermostat and any accessories.4.If an Electric Reheat Coil has been supplied, referto the electrical schematic which is permanentlyfixed to the underside of the electrical controlcabinet door, prior to hook-up. Check the voltagerequirements to ensure proper voltage supply isused.WARNING: Do not tamper with controlcomponents.Control ConnectionsDuct Connection1.External control air connections are provided formain air and thermostat connections.These are tobe piped according to the label on the inlet panel.2.Main air supply must be clean and dry, deliveredat 15 to 20 psi.3.Ensure that the lines are not crimped or cut wheninstalled.1.PNEUMATICFor accurate airflow control, there should be aminimum of 3 duct diameters of straight inletduct, either sheet metal or flexible, same size asthe inlet, between the unit inlet and any transition,take-offs or fittings. Use of transitions or elbowsat the inlet is to be avoided. Where flexible ductis used it should be pulled tight to eliminate sagsor folds.ELECTRONIC2.To control radiated noise in critical applications itis recommended that the inlet ducts be fabricatedof a minimum gauge of 24 in place of flexible duct.A wiring diagram is provided with each terminal.Thermostat and other accessories should be wiredas indicated by the wiring diagram.3.To prevent excessive air leakage, all cleat jointsshould be sealed with an approved duct sealer.This applies to all accessory connections as wellas the basic terminal unit.DIGITAL4.Holes that are drilled in the duct for testing orbalancing purposes are to be sealed.Air Volume ChartDxS, DxQ, DxM, DxUQInletSize45678910121416AdjustmentRange 68-3500 Copyright E.H. Price Limited 2011AdjustmentRange 85-897143-897439-1369205-1369562-1652268-1652If controls have been factory mounted, a wiringdiagram will be included with the unit indicatingfactory mounted components. For field wiring of roomsensors and other accessories, refer to documentationprovided by the controls ge 304-2100439-3000568-4000AdjustmentRange 991205-1416268-18885

Control Assembly LabelAll Price Dual Duct terminalunits are tagged with twocontrol assembly labels asshown on the left (one oneach side). The labels identifythe model number, controllertype, actuator type, thermostat action, damper action,location tag#, application andcontroller set points. Options,accessories and appropriatecontrol diagrams are alsoidentified. If field adjustmentof the controller should become necessary, follow theappropriate procedure outlined in this manual. Note thatall pneumatic controls mustbe calibrated in the positionthey are mounted.All factory supplied controllersare tagged with a controllerlabel as shown below.For pneumatic units, thecontroller label indicatesminimum and maximum airflow set points as well as theequivalent velocity pressures.For electronic units, the controller label indicates air flowset points and equivalentDC output voltage from thethermostat.For digital units, the controller label indicates air flow setpoints.6 Copyright E.H. Price Limited 2011

Digital Controls SectionFor information regarding control components, wiring, sequence of operations, calibration, trouble-shooting,etc. please refer to the documentation provided by the controls contractor. For airflow sensor calibration curvesand equations, refer to Pages 10 -12.Pneumatic Controls SectionCP101 Reset Velocity ControllerConsult the appropriate Price Control Diagram forspecific applications.SPECIFICATIONSDifferential Pressure Range0 to 1.0" w.g. (0 to 25.4mm w.g.)Minimum Set Point Range0 to 1.0" w.g. (0 to 25.4mm w.g.)Maximum Set Point RangeMinimum to 1.0" w.g. (0 to 25.4mm w.g.)Reset Pressure SpanField adjustable 0.0 to 10.0 psig (0.0 to .69 bar)Main Air Pressure15 to 30 psig (1.04 to 2.07 bar)Air Consumption1 scfh @ 20 psig (.472 l/min. @ 1.38 bar)DESCRIPTIONTHE CP101 RESET VELOCITY CONTROLLER PROVIDES PRESSURE INDEPENDENT OPERATION ON THE DPS/ DPQ8000 SERIES OF VARIABLE AIR VOLUME TERMINALS.Each controller is equipped with separate adjustment knobs for minimum and maximum air flow settings. Theminimum and maximum air flow settings are factory calibrated. However, they can be readjusted in the fieldif necessary. (See Page 9)The CP101 is used for either direct or reverse acting thermostats and can be used for normally open or normallyclosed dampers. The CP101 has a factory set reset start point which can be field adjusted, and has a factoryset reset span which can be field adjusted. The reset span is constant regardless of minimum and maximumset points.Ambient Limits 40/ 120 F operating ( 4/ 49 C)-40/ 140 F shipping (-40/ 60 C)Note: The controller should be supplied with clean, dry control air only. No attempt should be made to use any other medium. Copyright E.H. Price Limited 20117

Pneumatic Actuator Mounting InstructionsThe DPS/DPQ has been designed to accommodateseveral manufacturers’ actuators for both normallyopen or normally closed fail-safe operation.Figure 1 illustrates the standard actuator and linkageorientation for normally open units. Figure 2 illustratesthe orientation of a normally closed unit.If a change in the damper fail-safe position becomesnecessary, the following procedure should be used.1.Loosen the crank arm bolt (A) until the dampershaft rotates freely.2.Remove the screws (B) securing the actuatormounting bracket to the terminal unit.3.Relocate the actuator to the proper mounting holesas per Figure 3 and Table 1.4.Ensure the actuator linkage is in the properorientation as per Figure 1 or Figure 2. Installscrews (B) securing actuator mounting bracket tothe terminal.5.Rotate the damper shaft until the damper is inthe fail-safe position (full open or full closed) andtighten bolt on the crank arm (A)Note: The illustrations are for right hand mountingonly. The opposite orientation is required forleft hand side mounting (Figure 1 normallyclosed, Figure 2 normally open).Figure 38Figure 1 Normally Open ConfigurationFigure 2 Normally Closed ConfigurationTable 1Actuator 02MP909E1158Damper .C.N.C.N.C.4442433313 Copyright E.H. Price Limited 2011

Pneumatic (CP101 Controller) Calibration ProcedureA. Damper ActionF. Hot Deck Calibration1. Damper action is factory set on the controller to either(Variable Volume Operation)Normally Open or Normally Closed. To reset action,loosen damper selection switch screw and aligndesired action with damper arrow. Re-tighten screw.2. Actuator must be repositioned to provide appropriatefail safe position. See page 8.B. Reset Start Point1. Reset start point is factory calibrated to the specifiedsetting on the control assembly label.2. To field adjust, remove the gauge port cap at “G” andattach a 0-30 psi pressure gauge.3. Adjust the thermostat pressure at “T” port to thedesired start point value with a gradual switch orpressure regulator. (Start point is the lowest spanpressure.)4. Adjust “Reset Start” dial until the gauge pressurebegins to increase slightly (greater than zero but lessthan 0.3 psi).5. Replace gauge port cap.C. Reset Span1. Reset span is factory calibrated to the specified settingon the control assembly label.2. To field adjust, remove the gauge port cap at “G” andattach a 0-30 psi pressure gauge.3. Adjust the thermostat pressure at “T” port to above15 psi.4. Adjust “Reset Span” dial until the gauge pressure isequal to the desired reset span (total span pressure,not end span pressure).5. Replace gauge port cap.D. Air Volume Limits1. Remove the caps from the tees in the HI (red) andLO (green) tubes leading from the air flow sensor inthe assembly inlet or downstream sensor. Connect adifferential pressure gauge to the tees. A gauge witha 0 to 1 inch w.g. scale is recommended.2. Refer to the calibration curve for the size of inlet andappropriate sensor (downstream or inlet). From thecurve read the differential pressure for the requiredair flow.Note:The downstream sensor is the same size as thelargest inlet.3. Alternately you can calculate the differential pressurefrom the equations provided on page 12.E. Hot Deck Calibration(Constant Volume Operation)1. For constant volume units, the controller that isconnected to the downstream sensor will not havea thermostat line (usually the hot deck controller).2. Turn the "HI STAT" dial to its maximum position (fullycounter-clockwise). This will allow full calibrationrange on the "LO STAT" dial.3. Adjust the "LO STAT" dial on the controller (centerknob) until the gauge reads the required differentialpressure for the total flow setting.Turn the dial slowly,allowing time for the damper actuator to completeits travel in response to the adjustments.4. For calibration of the controller that is connected tothe inlet sensor (usually the cold deck controller), setthe thermostat to minimum cooling or disconnect thethermostat line from the controller.5. See section G for cold deck calibration. Copyright E.H. Price Limited 2011Note: The hot deck controller has a reset range of 3-8 psi.For readjustment, see sections B & C.1. Set the hot deck controller first. Adjust thermostat tomaximum heating or remove the thermostat line fromthe controller.2. Adjust the "LO STAT" dial (center knob) on the hot deckcontroller until the gauge reads the differential pressurefor maximum heating airflow. Turn the dial slowly,allowing time for the damper actuator to complete itstravel in response to the adjustments.3. If thermostat line was previously removed, then reconnectto the "T" port on the controller. Set the thermostat tominimum heating.4. Adjust the “HI STAT” dial on the controller until thegauge reads the required differential pressure for theminimum mixing airflow. Turn the dial slowly, allowingtime for the damper actuator to complete its travel inresponse to the adjustments.5. Cycle the thermostat several times. This can be quicklyaccomplished by removing the cap from the gauge port"G" and varying the bleed rate with finger pressure.Replace cap and check the airflow limits. If set pointschange, readjust using the above steps.G. Cold Deck Calibration (both Variableand Constant Volume Operation)NOTE: The cold deck controller has a standard reset rangeof 8-13 psi and is calibrated for a direct acting thermostat.For readjustment see sections B & C.6. Adjust the "LO STAT" dial on the controller (center knob)until the gauge reads the required differential pressurefor the minimum cooling airflow (usually zero).Turn thedial slowly, allowing time for the damper actuator tocomplete its travel in response to the adjustments.7. Connect the thermostat line, if previously disconnected,and set the thermostat to maximum cooling.8. Adjust the "HI STAT" dial on the controller until thegauge reads the required differential pressure for themaximum cooling airflow.Turn the dial slowly, allowingtime for the damper actuator to complete its travel inresponse to the adjustments.9. Cycle the thermostat several times. This can be quicklyaccomplished by removing the cap from the gauge port"G" and varying the bleed rate with finger pressure.Replace cap and check the airflow limits. If set pointschange, readjust using the above steps.H. General1. Always adjust the “LO STAT” dial first. Adjustment of“LO STAT” dial directly affects “HI STAT” dial setting.2. When measuring from downstream sensor gauge taps,ensure alternate deck is closed.3. After calibration is complete, reconnect the thermostattube to the controller if it has been removed during thecalibration procedure.4. Disconnect the gauge and replace the caps on the tees.5. Replace the protective control cover.9

Inlet Sensor Calibration Curves (see page 12 for equivalent calibration formulas)10 Copyright E.H. Price Limited 2011

Downstream Sensor Calibration Curves (see page 12 for equivalent calibration formulas) Copyright E.H. Price Limited 201111

Flow Sensor Calibration Equations(for Pneumatic or DDC Controls)Inlet SensorUnit SizeK()CP101 VP QK2Downstream SensorUnit SizeK434042155426534064686442VP differential pressure atsensor, inches w.g.Q air flow rate, cfm atstandard density7673758888908769Kcalibration constant (K - 980164074163679 Pneumatic Controls Parts ListComponentPart #DescriptionController076823-001CP101 Pneumatic ControllerActuators076857-001MCP-8031 Linear Actuator (5-10 psi)076838-001MCP-3631 Rotary Actuator (5-10 psi)076827-001MCP-0303 3" Stroke, Linear Actuator (5-10 psi)076827-002MCP-0305 3" Stroke, Linear Actuator (8-13 psi)12 Copyright E.H. Price Limited 2011

Pneumatic Controls Troubleshooting GuideGeneral1.Locate thermostat and cycle — direct acting thermostat willbleed on heating.2.Confirm box size and rating with drawing and box schedule(check label on terminal). Check position of controller toensure it is installed level.3.Check the damper selector switch at the face of the controller.Ensure that switch is set to correspond to damper‘s normalposition.4.Visually check piping and connections to box controls n Air (M)Thermostat (T)Actuator (B)High Port (H)Low Port (L)5.Ensure caps are installed on tee fittings between sensor andcontroller.6.Confirm main air pressure (15 psi minimum - 25 psi maximum).7.Confirm thermostat pressure. Cycle thermostat from fullcooling to full heating.8.Confirm actuator pressure from controller by cyclingthermostat.9.Confirm actuator operation by stroking actuator with a handpump noting at what pressure the actuator begins to strokeand is fully stroked.1.Connect a differential pressure gauge (0 - 1.0" w.g.) to the teesin the sensor lines between the sensor and the controller.2.Check velocity pressure reading and compare with the valueindicated on the controller label.3.If the velocity pressure is below the specified value and thedamper is fully open, this would indicate insufficient inletduct static pressure.If the Velocity Pressure Indicated by theGauge Does Not Match the SpecifiedValue.1.If the damper of the control assembly is partially closed, thisindicates the unit is under control.2.If the velocity pressure indicated by the gauge does not matchthe specified value, recalibrate the controller according tothe procedures outlined in this manual.If Supply Air Flow Measured by OtherMeans is Incorrect1.If the supply air flow measured by other means (pitot tubetraverse, summation of outlets) is incorrect inspect the inletconnection to the control assembly.2.Price recommends a minimum of 3 duct diameters of straightinlet duct, same size as inlet between the inlet and anytransition, take off or fitting.If Velocity Pressure Indicated by th

near the electrical control box. 3.efer to the control diagram supplied with each unit R for field wiring of thermostat and any accessories. 4. If an Electric R eheat Coil has been supplied, refer to the electrical schematic which is permanently fixed to the underside of the electrical control

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