American Standard UV05 manual Unit Mode Priority, Special purpose UVC unit mode priority

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Description of Operation

Unit Mode Priority

The UVC uses the network variables and binary inputs listed in Table 10 and Table 11 to determine the current unit mode. Special purpose UVC unit modes have higher priority than the normal UVC unit modes as shown in the tables.

Each table lists the highest priority items on the left to the lower priority items to the right. The right-most columns indicate unit operation as a result of the left-most columns. The term “Don’t care” in these tables implies that another network variable or binary input to the left has a higher priority.

Table 10: Special purpose UVC unit mode priority

				Priority result
Emergency override	Remote shutdown	Energy hold	Energy hold	Unit mode	Actual UVC action
input1	binary input	off input1	off output2	output2	Actual UVC action
input1	binary input	off input1	off output2	output2
	De-energized4	Normal	Normal	See	the normal
Normal3		Normal	Normal	UVC mode priority (Table 11)
				UVC mode priority (Table 11)
		Energy hold off	Energy hold off	Off	Off
		Energy hold off	Energy hold off	Off	Off
	Energized5	Don’t care	Energy hold off	Off	Off
Pressurize	Don’t care	Don’t care	Don’t care	Off	Pressurize
De-pressurize	Don’t care	Don’t care	Don’t care	Off	De-pressurize
Purge	Don’t care	Don’t care	Don’t care	Off	Purge
Shutdown	Don’t care	Don’t care	Don’t care	Off	Off

1.Network input.

2.Network output.

3.Normal indicates the UVC power-up condition.

4.De-energized indicates that the contacts connected to this binary input are open.

5.Energized indicates that the contacts connected to this binary input are closed.

Table 11: Normal UVC mode priority

			Priority result
Application override	Unit mode override		Unit mode output 2
input 1	input1		Unit mode output 2
input 1	input1
	Normal (Auto)3		Heat
	Normal (Auto)3		Cool
			Emergency heat
Normal (Auto)3	Heat		Heat
Normal (Auto)3	Cool		Cool
	Night purge		Night purge
	Off		Off
	Emergency heat		Emergency heat
	Fan only		Fan only
Heat	Don’t care		Heat
Cool	Don’t care		Cool
Night purge	Don’t care		Night purge
Off	Don’t care		Off
Emergency heat	Don’t care		Emergency heat
Fan only	Don’t care		Fan only

1.Network input.

2.Network output.

3.Normal (Auto) is the normal UVC power-up state.

McQuay OM 751

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Contents Date November DX Cooling Only Software Model UV05Group Applied Systems Description of Operation UVC Configuration ParametersIntroduction Getting StartedDescription Manual # Model-specific unit ventilator installation literatureAccessory-specific installation literature Software program literature Extreme temperature can damage system componentsDescription Acronym Abr Acronyms/AbbreviationsAcronyms and abbreviations 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 StateCant Heat State State D Emergency Heat Mode Super StateFull Heat State State Heat State State Auto ModeHeat Mode Super State Cant Heat State State B Cool Mode Super StateLow Limit State State E 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 optionalEffective set point calculations Set point calculation examplesExample a Example B Given PI loops Discharge Air Temperature ControlProportional Integral PI Control Loops PI loop listProportional Band PI Control ParametersOccupied, Standby, and Bypass Operation Indoor Air Fan OperationIntegral Time Outdoor Air Damper Operation OA temp sensor Space humidity Economizer enableEconomizer 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 onlyPriority Fault description Reset Keypad Alarm and Fault MonitoringAlarm and fault code summary 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