American Standard UV05 manual Set point calculation examples, Example a Example B Given

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Description of Operation

Figure 16: Effective set point calculations

Occupancy Temperature Setpoints (network configuration variables)

Occupied Cooling Set Point (OCS)

Standby Cooling Set Point (SCS)

Unoccupied Cooling Set Point (UCS)

Occupied Heating Set Point (OHS)

Standby Heating Set Point (SHS)

Unoccupied Heating Set Point (UHS)

Effective Set Point Calculations for each Occupancy Mode

AbsOffsetOccupied = Setpoint - (OCS + OHS)/2 AbsOffsetStandby = Setpoint - (SCS + SHS)/2

Space Temp Set Point Input (network input)

WallSensorType Config. Value

Set Point Offset Input (network input)

Network Value

	55°F/85°F
1	Wall Sensor

0	+3°F/–3°F

Wall Sensor

Local User

Interface

+5°F/–5°F

Network Value

Set Point

SetptOffset

Occupied and Bypass Modes

EffectiveCoolSetpoint = OCS + AbsOffsetOccupied + SetptOffset + OCSS EffectiveHeatSetpoint = OHS + AbsOffsetOccupied + SetptOffset + OHSS

Standby Mode

EffectiveCoolSetpoint = SCS + AbsOffsetStandby + SetptOffset + SCSS EffectiveHeatSetpoint = SHS + AbsOffsetStandby + SetptOffset + SHSS

Unoccupied Mode

EffectiveCoolSetpoint = UCS + UCSS

EffectiveHeatSetpoint = UHS + UHSS

SetptShift (network inputs)

Occupied Cooling Set Point Shift (OCSS) Standby Cooling Set Point Shift (SCSS)

Unoccupied Cooling Set Point Shift (UCSS) Occupied Heating Set Point Shift (OCSS)

Standby Heating Set Point Shift (SHSS) Unoccupied Heating Set Point Shift (UHSS)

If both entering paths have valid values, then the network value has priority.

If both entering paths have

valid values, then the keypad/display value has priority.

Table 15: Set point calculation examples

Example A

Example B

Given

OccupancyMode = Occupied or BypassHeat/CoolMode = Heat

SpaceTempSetpoint = (not used)

SetpointOffset = (not used) = 0.0°F

SetpointShift = (not used) = 0.0°F

OHS = 69.8°F

Effective set point calculations

EffectiveSetpoint = OHS + SetpointOffset + SetpointShift = 69.8 + 0.0 + 0.0 = 69.8°F

Given

OccupancyMode = Occupied or BypassHeat/CoolMode = Heat SpaceTempSetpoint = 71.0°F

SetpointOffset = -1.0°F (occupant adjustment on remote wall sensor, or LUI) SetpointShift = (not used) = 0.0°F

OCS = 73.4°F, OHS = 69.8F

Effective set point calculations

AbsoluteOffset = (OCS – OHS) / 2 =(73.4°F – 69.8°F) / 2 = 1.8°F

EffectiveSetpoint = SpaceTempSetpoint – AbsoluteOffset + SetpointOffset + SetpointShift = 71.0 - 1.0 - 1.0 + 0.0 = 68.2°F

28	McQuay OM 751

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Contents Group Applied Systems DX Cooling Only Software Model UV05Date November UVC Configuration Parameters IntroductionGetting Started Description of OperationAccessory-specific installation literature Model-specific unit ventilator installation literatureDescription Manual # Extreme temperature can damage system components Software program literatureAcronyms and abbreviations Acronyms/AbbreviationsDescription Acronym Abr OCS Using the Keypad/Display Display FormatKeypad Functions Security LevelsMode Key ON/STOP Key and LEDFAN Key Arrow KeysUsing the Keypad/Display Viewing Actual Indoor Air Temperature IATMenu Reference Changing Set PointsAbr Description Default RW1Chlo Description of Operation State ProgrammingComplete UVC-state diagram UVC Unit ModesOFF Mode State UVC state names and numbersNormal UVC modes State names DecimalNight Purge Mode State Fan Only Mode State aFull Heat State State Emergency Heat Mode Super StateCant Heat State State D Heat Mode Super State Auto ModeHeat State State Low Limit State State E Cool Mode Super StateCant Heat State State B Cool mode super state diagram Econ State StateEcon Mech State State Mech State StateSpecial Purpose Unit Modes Discharge Air DA Heat State StateLow Limit State State F Cant Cool State State CPressurize Mode Depressurize ModePurge Mode Shutdown ModeUnit Mode Priority Special purpose UVC unit mode priorityNormal UVC mode priority Priority resultOccupied Mode Unoccupied ModeStandby Mode Occupancy mode priorityAdditional Occupancy Features Space Temperature Set Points Networked Space Temperature Sensor CapabilityNetworked Set Point Capability Networked Set Point Offset CapabilityRemote Wall-Mounted Sensor with +/-3F Adjustment optional Effective Set Point CalculationsExample a Example B Given Set point calculation examplesEffective set point calculations Discharge Air Temperature Control Proportional Integral PI Control LoopsPI loop list PI loopsPI Control Parameters Proportional BandIntegral Time Indoor Air Fan OperationOccupied, Standby, and Bypass Operation Outdoor Air Damper Operation Economizer Economizer enableOA temp sensor Space humidity Networked Space Humidity Sensor Capability Networked Outdoor Humidity Sensor CapabilityCO2 Demand Controlled Ventilation optional Networked Space CO2 Sensor CapabilityCompressor Operation Ashrae CycleCompressor Envelope Compressor Cooling LockoutCompressor Minimum On and Off Timers Compressor Start DelayFloating-Point Actuator Auto-Zero, Overdrive and Sync Outdoor Air Fan OperationUnoccupied Input Signal Remote Shutdown Input SignalVentilation Lockout Input Signal External Binary InputsExhaust Interlock Input Signal Lights On/Off SignalFault Signal External Binary OutputsExhaust Fan ON/OFF Signal Auxiliary Heat SignalAuxiliary heat start/stop calculation Start/Stop CalculationInputs and outputs, software model 05-DX cooling only Expansion boardAlarm and fault code summary Alarm and Fault MonitoringPriority Fault description Reset Keypad DX Pressure Fault F1 Compressor Envelope Fault F2Space Temp Sensor Failure F0 Discharge Air DX Cooling Low Limit Indication F3Condensate Overflow Indication optional F4 Space Coil DX Temp Sensor Failure F5Outdoor Temp Sensor Failure F6 Discharge Air Temp Sensor Failure F7Troubleshooting Temperature Sensors Troubleshooting Humidity Sensors Temperature versus resistanceTroubleshooting Carbon Dioxide CO2 Sensors Humidity versus voltageCO2 versus voltage table RH % VDC mVUVC configuration parameters OM Configuration Parameter Name Abr Default LUI MenuAbr Default LUI Menu OAD Stroke Time Warranty