American Standard UV05 manual Econ State State, Cool mode super state diagram

Page 19

Description of Operation

Figure 12: Cool mode super state diagram

Transition

Point

UVCMode≠Cool AND UVCMode≠Auto

OR

UVCMode=Auto AND Space=Cold AND

MechPI=SatLow(3min) AND

EconPI=SatLow

UVCMode=Cool

OR

UVCMode=Auto AND Space=Warm

 

CoolMode

 

 

 

SuperState

Space=HighCO2

 

 

 

OR

 

 

 

 

DAT<VCLL

 

Econ≠Available

Econ

Space≠HighCO2

DAHeat

 

AND

3

4

MechCool≠Available

AND

 

 

 

HeatPI=SatLow

 

 

 

EconTimer=Expired

AND

 

 

Econ = Available

DAT>VCLL

HeatPI=SatHi(2min)

 

(3 minutes) AND

 

 

AND

EconPI=SatHi AND

 

AND DAT<VCLL

MechCool≠Available

MechCool=Available

 

LLPI=SatLow (2min)

 

 

MechPI=SatLow (3min) AND

 

 

AND

 

 

EconMechTimer=Expired

 

 

DAT>(VCLL+1.8F)

 

 

(3 minutes) OR

 

Econ≠Available

MechCool≠Available

 

 

 

 

 

 

AND

 

 

 

CantCool

MechCool=Available

EconMech

 

LowLimit

 

 

C1

F

Econ≠Available

Econ≠Available

AND

MechCool=AvailableEcon=Available

MechCool≠Available

Mech

2

Econ State (State 3)

The Econ state is a “normal” state during Cool mode. The Econ state typically is active in the Cool mode when primary cooling (economizer) is available and adequate to meet the cooling requirements.

When the Econ state becomes active, the UVC uses economizer cooling (see “Economizer Operation” on page 32) as needed to maintain the effective cooling set point (see “Space Temperature Set Points” on page 26). If cooling is not required while in the Econ state, the UVC can “idle” in the Econ state until cooling is required or until there is a call to switch to another mode or state.

The UVC monitors the DAT to ensure it does not fall below VCLL.

The CO2 demand controlled ventilation function (optional) will be active (see “CO2 Demand Controlled Ventilation (optional)” on page 34) and the OA damper is adjusted as needed to maintain the CO2 set point.

McQuay OM 751

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Contents Group Applied Systems DX Cooling Only Software Model UV05Date November Description of Operation UVC Configuration ParametersIntroduction Getting StartedAccessory-specific installation literature Model-specific unit ventilator installation literatureDescription Manual # Software program literature Extreme temperature can damage system componentsAcronyms and abbreviations Acronyms/AbbreviationsDescription Acronym Abr OCS Security Levels Using the Keypad/DisplayDisplay Format Keypad FunctionsArrow Keys Mode KeyON/STOP Key and LED FAN KeyChanging Set Points Using the Keypad/DisplayViewing Actual Indoor Air Temperature IAT Menu ReferenceRW1 Abr Description DefaultChlo State Programming Description of OperationUVC Unit Modes Complete UVC-state diagramDecimal OFF Mode StateUVC state names and numbers Normal UVC modes State namesFan Only Mode State a Night Purge Mode StateFull 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 Econ State State Cool mode super state diagramMech State State Econ Mech State StateCant Cool State State C Special Purpose Unit ModesDischarge Air DA Heat State State Low Limit State State FShutdown Mode Pressurize ModeDepressurize Mode Purge ModePriority result Unit Mode PrioritySpecial purpose UVC unit mode priority Normal UVC mode priorityOccupancy mode priority Occupied ModeUnoccupied Mode Standby ModeAdditional Occupancy Features Networked Set Point Offset Capability Space Temperature Set PointsNetworked Space Temperature Sensor Capability Networked Set Point CapabilityEffective Set Point Calculations Remote Wall-Mounted Sensor with +/-3F Adjustment optionalExample a Example B Given Set point calculation examplesEffective set point calculations PI loops Discharge Air Temperature ControlProportional Integral PI Control Loops PI loop listProportional Band PI Control ParametersIntegral Time Indoor Air Fan OperationOccupied, Standby, and Bypass Operation Outdoor Air Damper Operation Economizer Economizer enableOA temp sensor Space humidity Networked Space CO2 Sensor Capability Networked Space Humidity Sensor CapabilityNetworked Outdoor Humidity Sensor Capability CO2 Demand Controlled Ventilation optionalCompressor Cooling Lockout Compressor OperationAshrae Cycle Compressor EnvelopeOutdoor Air Fan Operation Compressor Minimum On and Off TimersCompressor Start Delay Floating-Point Actuator Auto-Zero, Overdrive and SyncExternal Binary Inputs Unoccupied Input SignalRemote Shutdown Input Signal Ventilation Lockout Input SignalExternal Binary Outputs Exhaust Interlock Input SignalLights On/Off Signal Fault SignalStart/Stop Calculation Exhaust Fan ON/OFF SignalAuxiliary Heat Signal Auxiliary heat start/stop calculationExpansion board Inputs and outputs, software model 05-DX cooling onlyAlarm and fault code summary Alarm and Fault MonitoringPriority Fault description Reset Keypad Discharge Air DX Cooling Low Limit Indication F3 DX Pressure Fault F1Compressor Envelope Fault F2 Space Temp Sensor Failure F0Discharge Air Temp Sensor Failure F7 Condensate Overflow Indication optional F4Space Coil DX Temp Sensor Failure F5 Outdoor Temp Sensor Failure F6Troubleshooting Temperature Sensors Temperature versus resistance Troubleshooting Humidity SensorsRH % VDC mV Troubleshooting Carbon Dioxide CO2 SensorsHumidity versus voltage CO2 versus voltage tableConfiguration Parameter Name Abr Default LUI Menu UVC configuration parameters OMAbr Default LUI Menu OAD Stroke Time Warranty
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