American Standard UV05 OFF Mode State, UVC state names and numbers, Normal UVC modes State names

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Description of Operation

Table 8: UVC state names and numbers

	Normal UVC modes		State names		State numbers
	Normal UVC modes		State names	Decimal	ASCII	Hex
				Decimal	ASCII	Hex
	OFF		OFF	9	9	57
	Night purge		Night Purge	8	8	56
	Fan only		Fan Only	10	A	65
	Emergency heat		Full Heat	7	7	55
	Emergency heat		Cant Heat	13	D	68
			Cant Heat	13	D	68
			Heat	5	5	53
		Heat	Cant Heat	11	B	66
			Low Limit	14	E	69
			EconMech	1	1	49
	Auto		Mech	2	2	50
		Cool	Econ	3	3	51
		Cool	DA Heat	4	4	52
			DA Heat	4	4	52
			Cant Cool	12	C	67
			Low Limit	15	F	70

WARNING

Off mode is a “stop” state for the unit ventilator. It is not a “power off” state. Power may still be provided to the unit.

OFF Mode (State 9)

Off mode is provided so that the UVC can be forced into a powered OFF condition. OFF mode is a “stop” state for the unit ventilator; it is not a power off state. OFF mode consists of a single UVC state: OFF [9].

When OFF mode becomes active, the UVC stops all normal heating, cooling, and ventilation (OA damper is closed), and fan operation ends. The UVC continues to monitor space conditions, indicate faults, and provide network communications (if connected to a network) in the OFF mode while power is maintained to the unit.

While in OFF mode, the UVC does not maintain DA temperatures. If the space temperature drops below EHS while in the OFF mode, the UVC is forced into the Emergency Heat mode (see “Emergency Heat Mode (Super State)” on page 16).

The space lighting output continues to operate based upon the current occupancy mode.

Note – Special purpose unit modes such as Purge, Pressurize, and De-pressurize can force the UVC to perform “special” functions during which the display appears to be in the OFF mode.

Figure 7: Off state diagram

OFF

9

UVC Mode = OFF

UVC Mode ≠ OFF

Transition point

14	McQuay OM 751

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Contents Date November DX Cooling Only Software Model UV05Group Applied Systems Getting Started UVC Configuration ParametersIntroduction Description of OperationDescription Manual # Model-specific unit ventilator installation literatureAccessory-specific installation literature Extreme temperature can damage system components Software program literatureDescription Acronym Abr Acronyms/AbbreviationsAcronyms and abbreviations OCS Keypad Functions Using the Keypad/DisplayDisplay Format Security LevelsFAN Key Mode KeyON/STOP Key and LED Arrow KeysMenu Reference Using the Keypad/DisplayViewing Actual Indoor Air Temperature IAT Changing Set PointsAbr Description Default RW1Chlo Description of Operation State ProgrammingComplete UVC-state diagram UVC Unit ModesNormal UVC modes State names OFF Mode StateUVC state names and numbers DecimalNight Purge Mode State Fan Only Mode State aCant 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 Cool mode super state diagram Econ State StateEcon Mech State State Mech State StateLow Limit State State F Special Purpose Unit ModesDischarge Air DA Heat State State Cant Cool State State CPurge Mode Pressurize ModeDepressurize Mode Shutdown ModeNormal UVC mode priority Unit Mode PrioritySpecial purpose UVC unit mode priority Priority resultStandby Mode Occupied ModeUnoccupied Mode Occupancy mode priorityAdditional Occupancy Features Networked Set Point Capability Space Temperature Set PointsNetworked Space Temperature Sensor Capability Networked Set Point Offset CapabilityRemote Wall-Mounted Sensor with +/-3F Adjustment optional Effective Set Point CalculationsEffective set point calculations Set point calculation examplesExample a Example B Given PI loop list Discharge Air Temperature ControlProportional Integral PI Control Loops PI loopsPI Control Parameters Proportional BandOccupied, Standby, and Bypass Operation Indoor Air Fan OperationIntegral Time Outdoor Air Damper Operation OA temp sensor Space humidity Economizer enableEconomizer CO2 Demand Controlled Ventilation optional Networked Space Humidity Sensor CapabilityNetworked Outdoor Humidity Sensor Capability Networked Space CO2 Sensor CapabilityCompressor Envelope Compressor OperationAshrae Cycle Compressor Cooling LockoutFloating-Point Actuator Auto-Zero, Overdrive and Sync Compressor Minimum On and Off TimersCompressor Start Delay Outdoor Air Fan OperationVentilation Lockout Input Signal Unoccupied Input SignalRemote Shutdown Input Signal External Binary InputsFault Signal Exhaust Interlock Input SignalLights On/Off Signal External Binary OutputsAuxiliary heat start/stop calculation Exhaust Fan ON/OFF SignalAuxiliary Heat Signal Start/Stop CalculationInputs and outputs, software model 05-DX cooling only Expansion boardPriority Fault description Reset Keypad Alarm and Fault MonitoringAlarm and fault code summary Space Temp Sensor Failure F0 DX Pressure Fault F1Compressor Envelope Fault F2 Discharge Air DX Cooling Low Limit Indication F3Outdoor Temp Sensor Failure F6 Condensate Overflow Indication optional F4Space Coil DX Temp Sensor Failure F5 Discharge Air Temp Sensor Failure F7Troubleshooting Temperature Sensors Troubleshooting Humidity Sensors Temperature versus resistanceCO2 versus voltage table Troubleshooting Carbon Dioxide CO2 SensorsHumidity versus voltage RH % VDC mVUVC configuration parameters OM Configuration Parameter Name Abr Default LUI MenuAbr Default LUI Menu OAD Stroke Time Warranty