American Standard UV05 User Manual

© 2006 McQuay InternationalDX Cooling Only-Software Model UV05Used with AAF-HermanNelson Classroom Unit VentilatorModel AVV - Floor MountedModel AHV -

10 McQuay OM 751Getting StartedFigure 5: Changing a keypad/display menu itemTable 7: Keypad/display menu item listDisplay Keypad menu item list Abr. D

McQuay OM 751 11Getting Startedo5Exhaust Interlock OAD Min Position set pointEOADAdjust OA damper position above which the exhaust fan output will be

12 McQuay OM 751Description of OperationDescription of OperationState ProgrammingThe MicroTech II UVC takes advantage of “state” machine programming t

McQuay OM 751 13Description of OperationFigure 6: Complete UVC—state diagramUVC Unit ModesThe UVC provides several “normal” modes of unit operation. T

14 McQuay OM 751Description of OperationTable 8: UVC state names and numbersOFF Mode (State 9)Off mode is provided so that the UVC can be forced into

McQuay OM 751 15Description of OperationNight Purge Mode (State 8)Night Purge mode is provided as a means to more easily and quickly ventilate a space

16 McQuay OM 751Description of OperationEmergency Heat Mode (Super State)The Emergency Heat mode is provided for situations where the UVC is in a mode

McQuay OM 751 17Description of OperationAuto ModeAuto mode is provided so that the UVC can be set to automatically determine if heating or cooling is

18 McQuay OM 751Description of OperationNote – The OAD is considered to be in “alarm” when the OAD is forced below the active minimum position in the

McQuay OM 751 19Description of OperationFigure 12: Cool mode super state diagramEcon State (State 3)The Econ state is a “normal” state during Cool mod

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Acronyms/Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . .

20 McQuay OM 751Description of OperationFigure 13: Econ state operation (occupied mode and auto fan)Econ Mech State (State 1)The Econ Mech state is a

McQuay OM 751 21Description of OperationThe CO2 demand controlled ventilation function (optional) is active (see “CO2 Demand Controlled Ventilation (o

22 McQuay OM 751Description of OperationIn each of these special purpose UVC modes, if the space temperature drops below EHS and the Emergency Heat fu

McQuay OM 751 23Description of OperationUnit Mode PriorityThe UVC uses the network variables and binary inputs listed in Table 10 and Table 11 to dete

24 McQuay OM 751Description of OperationOccupancy ModesThe UVC is provided with four occupancy modes: Occupied, Standby, Unoccupied, and Bypass. The o

McQuay OM 751 25Description of OperationBypass ModeThe bypass mode (also called Tenant Override) is the equivalent of a temporary occupied mode. Once

26 McQuay OM 751Description of OperationSpace Temperature Set PointsThe UVC uses the six occupancy-based temperature set points as the basis to determ

McQuay OM 751 27Description of OperationRemote Wall-Mounted Sensor with +/–3°FAdjustment (optional)When the optional remote wall-mounted sensor with +

28 McQuay OM 751Description of OperationFigure 16: Effective set point calculationsTable 15: Set point calculation examplesExample AGivenOccupancyMode

McQuay OM 751 29Description of OperationProportional Integral (PI) Control LoopsThe MicroTech II UVC uses PI-loop control for heating, cooling and ven

McQuay OM 751 3IntroductionIntroductionThis manual provides information on the MicroTech II® control system used in the AAF®-HermanNelson® Unit Ventil

30 McQuay OM 751Description of OperationPI Control ParametersAssociated with each PI loop is a set of two adjustable parameters: Proportional Band and

McQuay OM 751 31Description of OperationIn general, it is best to start with a relatively large proportional band setting (the factory default setting

32 McQuay OM 751Description of OperationUnoccupied OperationDuring unoccupied mode, the IA fan typically remains off and cycles with calls for heating

McQuay OM 751 33Description of Operation• Expanded (optional)—Temperature Comparison with OA Enthalpy Setpoint Economizer (Strategy 1)• Leading Edge (

34 McQuay OM 751Description of OperationNetworked Space Humidity Sensor CapabilityA networked space humidity sensor can be network interfaced with the

McQuay OM 751 35Description of OperationASHRAE Cycle IIThe UVC supports ASHRAE Cycle II operation. The basis of ASHRAE Cycle II is to maintain the req

36 McQuay OM 751Description of OperationCompressor Minimum On and Off TimersThe UVC is provided with minimum On (3-minute default) and minimum Off (5-

McQuay OM 751 37Description of OperationExternal Binary InputsThe UVC is provided with three binary inputs that provide the functions described below.

38 McQuay OM 751Description of OperationExhaust Interlock Input SignalThis input allows a single set of dry contacts to be used to signal the UVC that

McQuay OM 751 39Description of OperationExhaust Fan ON/OFF SignalThis relay output provides one set of Normally Open dry contacts that can be used to

4 McQuay OM 751IntroductionTable 4: Software program literatureDescription Manual #Air Source Heat Pump with Electric Heat (Software Model 00) OM 748W

40 McQuay OM 751UVC Input and Output TableUVC Input and Output TableAll UVC input and output connections and their corresponding unit ventilator usage

McQuay OM 751 41Diagnostics and ServiceDiagnostics and ServiceThe most important aspect of troubleshooting unit ventilator controls is to isolate the

42 McQuay OM 751Diagnostics and ServiceSpace Temp Sensor Failure (F0)The Space Temp Sensor Failure fault occurs when the UVC detects open or short con

McQuay OM 751 43Diagnostics and ServiceCondensate Overflow Indication (optional) (F4)The Condensate Overflow Indication fault will occur when the UVC

44 McQuay OM 751Diagnostics and ServiceSpace Humidity Sensor Failure (optional) (FA)The Space Humidity Sensor Failure fault occurs when the UVC detect

McQuay OM 751 45Diagnostics and Service3Use the temperature reading from Step 2 to determine the expected sensor resistance from Table 23.4 Using a ca

46 McQuay OM 751Diagnostics and ServiceTable 24: Humidity versus voltage.Troubleshooting Carbon Dioxide (CO2) SensorsThe UVC is configured to use a 0–

McQuay OM 751 47UVC Configuration ParametersUVC Configuration ParametersThe UVC is been provided with a number of configuration variables as listed in

48 McQuay OM 751UVC Configuration ParametersPrimary Cool Proportional Band 18°F (10°C) Primary Cool Integral Time 180 sec Secondary Cool Proportional

McQuay OM 751 49UVC Configuration ParametersOAD Stroke Time90 secSplit-System OA/DX Coil Temp used on split-system units only to partially disable the

McQuay OM 751 5IntroductionAcronyms/AbbreviationsThe following table list acronyms and abbreviations that may or may not be used within this manual. O

© 2006 McQuay International • www.mcquay.com • 800-432-1342McQuay Training and DevelopmentNow that you have made an investment in modern, efficient Mc

6 McQuay OM 751IntroductionOccupied Cooling Setpoint OCS Occupied Heating Setpoint OHS Occupancy Override Input OOIOccupancy Sensor Input OSIProport

McQuay OM 751 7Getting StartedGetting StartedThe MicroTech II Unit Vent Controller (UVC) is a self-contained device that is capable of complete, stand

8 McQuay OM 751Getting StartedTable 6: Keypad/display security levelsFigure 2: Changing keypad/display security levelsON/STOP Key and LEDUse the ON/ST

McQuay OM 751 9Getting StartedUsing the Keypad/DisplayViewing Actual Indoor Air Temperature (IAT)Normally, the effective set point temperature appears