02 metasys zoning package user's guide: zoning the rooftop ... · when free cooling is...

Metasys Zoning Package User’s Guide 2-1

© September 1, 2002 Johnson Controls, Inc. www.johnsoncontrols.comCode No. LIT-639320

Chapter 2

Zoning the Rooftop Unit

IntroductionIn this document, Building Automation System (BAS) is a genericterm that refers to the Metasys Network and N30 Series supervisorysystems. The specific system names are used when referring tosystem-specific applications.

The rooftop unit delivers warm supply air for heating and cold supplyair for cooling. If zones on a single rooftop simultaneously requireheating and cooling, and cooling is the priority, the rooftop unitdelivers enough cold supply air to satisfy the cooling zones, thenswitches over to warm supply air for the zones calling for heating.Zone dampers regulate the introduction of this supply air into thezones. The volume and temperature of the supply air varies with thezone loads.

This chapter contains information on multi-zone and standalonerooftop applications for the Unitary (UNT) controller application anddescribes how to:

• create the rooftop application in HVAC PRO software

• adjust rooftop parameters

• monitor rooftop parameters

• download the rooftop application to the UNT controller

Zoning the Rooftop Unit2-2

Key Concepts

HVAC PRO SoftwareHVAC PRO software is used to configure and commission the Unitary(UNT) controller that controls the rooftop unit. Refer to theHVAC PRO User’s Guide for specific procedures.

Note: The parameters in Table 2-8 listed as RT and RT-Mapplications apply to the multi-zone rooftop application.

EconomizerThe rooftop economizer changeover strategy is based on dry bulbtemperature and outdoor enthalpy. The outdoor air temperature mustbe 2ºC (2ºF) less than the Drybulb Econ SP value for free cooling tobe available. Outdoor enthalpy must also drop below the OA EnthalpySP by a value equal to the OA Enthalpy Diff parameter.

The Econ Status equals True when:

OAT < [Drybulb Econ SP - 2ºC (2ºF)]

AND

OA Enthalpy < (OA Enthalpy SP – OA Enthalpy Diff).

If either the outdoor temperature sensor or the humidity sensorbecomes unreliable, free cooling is not available. The state of theeconomizer changeover is displayed by the Econ Status parameter.The Outdoor Air Temp (AI5) and OA Rel Humid (AI6) inputs arerequired for the economizer to function.

When the controller is in Occupied mode, the economizer damper willopen to the minimum position defined by the Minimum Pos parameter.Carbon dioxide, discharge air temperature, and outdoor air temperatureinfluence the economizer minimum position:

• As AI3, Carbon Dioxide, exceeds the CO2 Low Limit parameterand increases through the CO2 Reset Band parameter, theeconomizer damper modulates to minimum position plus the valueof the Min Pos Rband parameter.

• As AI4, Discharge Air, drops below the value of the Dis Air LowLim parameter minus the value of the Dis Air LL DBandparameter and drops through the value of the Dis Air LL PBandparameter, the damper command decreases until the economizerdamper is fully closed. A user-defined Dis Air LL Int Tmparameter is available for this control sequence as long as air status(supply fan and airflow switch) has been proven and the unit is notin Shutdown mode.


• As AI5, Outdoor Air Temp, increases from 29.4 to 37.8ºC (85 to100ºF), the Damper Command decreases until the economizerdamper is fully closed. If the outdoor air temperature sensor goesunreliable, the damper returns to minimum position.

Note: AI3, Carbon Dioxide, is not required to implement theeconomizer changeover strategy. If used, AI3 works as describedabove.

Regardless of these conditions, the damper cannot close beyond theuser-defined Economizer Offset during Occupied mode. Theeconomizer is fully closed if air status (supply fan and airflow switch)is not proven or if the controller is placed in Unoccupied or Shutdownmode.

When free cooling is available (Econ Status parameter equals On) in azoning application, the economizer damper modulates from minimumposition to fully open as the zone cooling command increases from0 to 30%.

For the economizer logic, zoning is determined by the status of BI3,Auto Mode. If the Auto Mode BI equals Off, zoning logic is used. Ifthe Auto Mode BI equals On, Return Air Control is used (see RooftopSingle Zone [Standalone] PI Control in this chapter). To enable DryBulb or Enthalpy Economizer Switchover, refer to Metasys ZoningPackage Installation Technical Bulletin (LIT-639200).

Vent and Purge ModesVent mode opens the economizer damper to 100%, but allows allheating, cooling, and humidifying to continue operation. This mode isused when a system requires constant ventilation with 100% outsideair.

Purge mode opens the economizer damper to 100% and shuts off allmechanical heating, cooling, and humidifying. This mode is typicallyused to purge the system air of volatile contents, such as paint fumes.

The Vent and Purge modes can only take effect during Occupied orUnoccupied mode; neither mode is effective during Shutdown mode.The economizer damper does not open until supply airflow is proven.Either mode energizes the supply fan start command.

Note: If the controller commands the Vent and Purge modes onsimultaneously, Vent mode takes priority.


Zone DemandA zone demand is a demand for heating or cooling to a particular zone.A negative (-) value indicates a call for heating, and a positive (+)value indicates a call for cooling.

The maximum heating and cooling demands from the zones areselected when N2 communication with the BAS is present, and theAuto mode binary input is open. The rooftop unit reverts to singlezone control if the Auto mode binary input is closed or ifN2 communication is lost for 10 minutes. The Zone Control parameterequals Yes when the rooftop parameter is zoning. If Zone Controlequals No, the rooftop is performing Return Air Control of a singlezone.

Zone ResponseUnresponsive zones are determined by comparing the zone boxdemands (Zone Demand 1 through Zone Demand 15) to the maximumheating or cooling commands when operating in the respectiveHeating or Cooling mode.

A Zone Response Alarm (BD36 through BD50) is initiated if a ZoneDemand (ADF170 through ADF184) remains at -100% for heating or100% for cooling longer than the Zone Unresponse Time. A ZoneResponse Alarm is cleared when the Zone Demand decreases belowthe maximum heating or cooling command. Therefore, the values-99 through 99% clear the Zone Response Alarm and reset the ZoneUnresponse Time for that zone.

Hot or cold climates and inadequate equipment design may cause thezones of a building to remain at -100% for heating or 100% forcooling, resulting in a Zone Response Alarm. In these situations, theZone Response Alarm pinpoints insufficient heating or cooling in thezones. To reset the Zone Response Alarm to normal, use the Interlockobject to automatically reset the Zone Unresponse Time. The Interlockobject establishes conditional control over the unresponsive zone usingIF conditional statements, True command statements, and Falsecommand statements to reset the Zone Unresponse Time and clear theZone Unresponse Alarm. The result is the ability of the UNTcontroller to respond to the Zone’s Demands.

Note: The Zone Unresponse Time is the same and applied to eachzone.

For more information, refer to Metasys Zoning PackageCommissioning Technical Bulletin (LIT-639250), Object Dictionary,or the Working with Interlock Objects (LIT-6892140) chapter of theN30 Supervisory Controller User’s Manual.


Heating and Cooling ModesThe Heating or Cooling Commands affect the capacity of the rooftopunit to supply warmer or cooler air by activating or deactivatingadditional heating or cooling.

Heating Mode is On when the rooftop unit is in heating priority andHeating Command is greater than Htg Stg 1 Start (or greater thanMod Htg Start for modulated gas heating). See Table 2-1. CoolingCommand is forced to 0% during Heating Mode.

Note: Heating Command equals the largest negative zone demand.

Table 2-1: Priority and Heating

Priority Heating Command > Htg Stg 1 Start* Heating ModeCooling False Off

Cooling True Off

Heating False Off

Heating True On

* Heating Command must drop below the Htg Stg 1Start threshold by theHtg Stg 1 Diff to change from 1 to 0.

Note: Off = 0 and On = 1.

For example, if the rooftop unit is in cooling priority and the HeatingCommand is not greater than Htg Stg 1 Start, the rooftop unit is inCooling Mode. If the rooftop unit is in heating priority and the HeatingCommand is greater than Htg Stg 1 Start, the rooftop unit is in HeatingMode.

Cooling Mode is On when the rooftop unit is in cooling priority andCooling Command is greater than Clg Stg 1 Start. See Table 2-2.Heating Command is forced to 0% during the Cooling Mode.

Note: Cooling Command equals the largest positive zone demand.

Table 2-2: Priority and Cooling

Priority Cooling Command > Clg Stg 1 Start* Cooling ModeHeating False Off

Heating True Off

Cooling False Off

Cooling True On

* Cooling Command must drop below the Clg Stg 1Start threshold by theClg Stg 1 Diff to change from 1 to 0.



For example, if the rooftop unit is in heating priority and the CoolingCommand is not greater than Clg Stg 1 Start, the rooftop unit is inHeating Mode. If the rooftop unit is in cooling priority and the CoolingCommand is greater than Clg Stg 1 Start, the rooftop unit is in CoolingMode.

Notes: Heating Mode does not need to be On to stage heat andCooling Mode does not need to be On to stage cooling.

If both Heating and Cooling Mode are Off, the rooftop unitstill can provide warm or cool supply air by energizing stages ofheating (or modulated gas) or cooling based on priority and demand.See Table 2-3.

Table 2-3: Heating and Cooling States

Heating Mode Cooling Mode Heating Command Cooling CommandOff Off Largest zone heating demand Largest zone cooling demand

On Off Largest zone heating demand Forced to 0%

Off On Forced to 0% Largest zone cooling demand


For example, if heating or cooling priority is being automaticallydetermined based on outdoor air temperature and the outdoor air iscold, the rooftop unit operates in heating priority. Cooling Modeequals Off because it is the non-priority mode. Nonetheless, coolingstages can still be energized as long as the Heating Command is notgreater than Htg Stg 1 Start (or Mod Htg Start).

Notes: To prevent the rooftop unit from responding too rapidly tochanges in demand, a five-minute delay occurs during transitionsbetween heating and cooling.

Each zone VMA controller also contains a parameter calledHeating Mode, but this parameter is different from the Heating Modein the rooftop unit. The zone control application does not contain aCooling Mode parameter.


Heating or Cooling PriorityPriority indicates the type of demand (heating or cooling) to besatisfied first. For example, if the rooftop unit is in heating priority, allheating demands must be satisfied before the rooftop unit switchesover to cooling.

Notes: When the rooftop unit is in heating priority, the CoolingCommand is forced to 0%.

When the rooftop unit is in cooling priority, the HeatingCommand is forced to 0%.

The Priority Selection parameter can be set to Manual or Auto.

When set to Manual, the user-defined Htg/Clg Priority parameterdetermines whether the rooftop unit is in heating or cooling priority.Manual mode is most appropriate when all zones usually requirecooling, or usually require heating.

When set to Auto, the Outdoor Air Temperature (OAT) determinesheating or cooling priority (see Figure 2-1). If the outdoor airtemperature is warmer than the OAT Changeover parameter, therooftop unit operates in cooling priority. If the Outdoor AirTemperature drops 5ºC (5ºF) below the OAT Changeover parameter,the rooftop unit operates in heating priority. The Auto setting is mostappropriate for exterior zones.

Note: The Htg/Clg Priority parameter set to Manual is ignoredwhen the Auto Priority Selection parameter is set to Auto.

OAT Changeover

1

1. Rooftop unit changes over to heating priority.2. Rooftop unit changes over to cooling priority.

2

Outdoor AirTemperature

autoprior

5 C (5 F)o o

Figure 2-1: Automatic Heating or Cooling Priority Selection


Staged Heating CommandHeating Command equals the largest zone demand for heating.

When the Heating Command is greater than Htg Stg 1 Start, HeatingStage 1 energizes, and Cmnd to Htg Seq increases to 60%. When theHeating Command drops below Htg Stg 1 Start by a value equal to theHtg Stg 1 Diff value, Heating Stage 1 de-energizes, and Cmnd to HtgSeq decreases to 0%.

When the Heating Command is greater than Htg Stg 2 Start, HeatingStage 2 energizes, and Cmnd to Htg Seq increases to 100%. When theHeating Command drops below Htg Stg 2 Start by a value equal to theHtg Stg 2 Diff value, Heating Stage 2 de-energizes, and Cmnd to HtgSeq decreases to 60%.

Htg Stg 2 Diff

Htg Stg 2 Start

Htg Stg 1 Start

Htg Stg 1 Diff

2

1

1. Heating Stage 1 energizes.2. Heating Stage 2 energizes.3. Heating Stage 2 de-energizes.4. Heating Stage 1 .de-energizes

3

4

HeatingCommand

stagedhtg

Figure 2-2: Staged Heating Command


Heating High LimitIf the discharge air temperature rises above Htg Hi Limit 2, HeatingStage 2 is disabled, and the heating command drops to 60%. HeatingStage 2 remains disabled until the discharge air temperature dropsbelow Htg Hi Limit 2 by a number of degrees equal to the Hi LimitDiff value.

If the discharge air temperature rises above Htg Hi Limit 1, the heatingcommand is forced to 0%, and Heating Stage 1 is disabled. HeatingStage 1 remains disabled until the discharge air temperature dropsbelow Htg Hi Limit 1 by a number of degrees equal to the Hi LimitDiff value.

The normal/alarm state will be displayed through Hi Limit Statuswhen either high limit condition exists. The heating command isforced to 0% if air status (supply fan and airflow switch) is not provenor if the controller is placed in a Purge or Shutdown mode.

Htg Hi Limit 1

Htg Hi Limit 2

Hi Limit Diff

1

1. Heating Stage 2 is disabled.2. Heating Stage 1 is disabled3. Heating Stage 1 is available.4. Heating Stage 2 is available.

.

2

Hi Limit Diff

3

4

Discharge AirTemperature

htghigh

Figure 2-3: Heating High Limit


Staged Heating LockoutIf the outdoor air temperature rises above Htg 2 Lockout, HeatingStage 2 is disabled while Heating Stage 1 continues to operate.Heating Stage 2 remains disabled until the outdoor air temperaturedrops below Htg 2 Lockout by 2ºC (2ºF). The Htg 2 Lock Statparameter displays the status of Htg 2 Lockout.

If the outdoor air temperature rises above Htg 1 Lockout, HeatingStage 1 is disabled regardless of heating demand. Heating Stage 1remains disabled until the outdoor air temperature drops below theHtg 1 Lockout value by 2ºC (2ºF). The Htg 1 Lock Stat parameterdisplays the status of Htg 1 Lockout.

Htg 1 Lockout

Htg 2 Lockout 1

1. Heating Stage 2 is disabled.2. Heating Stage 1 is disabled.3. Heating Stage 1 is available.4. Heating Stage 2 is available.

2

3

4


htglock

2 C (2 F)o o

2 C (2 F)o o

Figure 2-4: Staged Heating Lockout


Modulated Gas Heating CommandHeating Command equals the largest zone demand for heating.

If the Heating Command is greater than Mod Htg Start, the Mod HtgProp Valve modulates open or closed based on the 0 to 100% call forheating. If Heating Command is less than Mod Htg Start by a valueequal to the Mod Htg Diff value, the Mod Htg Prop Valve iscommanded to 0%.

1. Modulated Heating Proportional Valve modulates open or closed, based on the 0 to 100% call for heating.2. Modulated Heating Proportional Valve is commanded to 0%.

modhtg

Mod Htg Start

Mod Htg Diff

HeatingCommand

1

2

Figure 2-5: Modulated Gas Heating Command

Modulated Gas Heating LockoutIf the outdoor air temperature rises above Htg Lockout, the Mod HtgProp Valve is commanded to 0%, regardless of heating demand.If the outdoor air temperature drops below Htg Lockout by 2ºC (2ºF),the Mod Htg Prop Valve modulates open or closed based on the0 to 100% call for heating. The Htg 1 Lock Stat parameter displays thestatus of Htg 1 Lockout.

Htg Lockout 1

1. Modulated Heating Proportional Valve is disabled.2. Modulated Heating Proportional Valve is available.

2


modhtglk

2 C (2 F)o o

Figure 2-6: Modulated Gas Heating Lockout


Two-Stage Cooling CommandCooling Command equals the largest zone demand for cooling.

When the Cooling Command is greater than Clg Stg 1 Start, CoolingStage 1 energizes, and Cmnd to Clg Seq increases to 60%. When theCooling Command drops below Clg Stg 1 Start by a value equal to theClg Stg 1 Diff value, Cooling Stage 1 de-energizes, and Cmnd to ClgSeq decreases to 0%.


A shutdown command results in all stages immediately turning offeven if the minimum On time has not expired. The minimum Off timefor the staged outputs must be satisfied when the controller comes outof a Shutdown mode.

Clg Stg 2 Diff

Clg Stg 2 Start

Clg Stg 1 Start

Clg Stg 1 Diff

2

1

1. Cooling Stage 1 energizes.2. Cooling Stage 2 energizes.3. Cooling Stage 2 de-energizes.4. Cooling Stage 1 .de-energizes

3

4

CoolingCommand

stagedclg

Figure 2-7: Two-Stage Cooling Command


Two-Stage Cooling Low LimitIf the discharge air temperature drops below Clg Lo Limit 2, CoolingStage 2 is disabled, and the cooling command drops to 60%. CoolingStage 2 remains disabled until the discharge air temperature risesabove the Clg Lo Limit 2 by a number of degrees equal to theLo Limit Diff value.

If the discharge air temperature drops below Clg Lo Limit 1, thecooling command is forced to 0%, and Cooling Stage 1 is disabled.Cooling Stage 1 remains disabled until the discharge air temperaturerises above Clg Lo Limit 1 by a number of degrees equal to the LoLimit Diff value.

The normal/alarm displays through the Lo Limit Status when eitherlow limit condition exists. The cooling command is forced to 0% if airstatus (supply fan and airflow switch) is not proven or if the controlleris placed in Purge or Shutdown mode.

Clg Lo Limit 1

Clg Lo Limit 2

Lo Limit Diff

1

1. Cooling Stage 2 is disabled.2. Cooling Stage 1 is disabled3. Cooling Stage 1 is available.4.

.

Cooling Stage 2 is available.

2

Lo Limit Diff

3

4


clglow

Figure 2-8: Two-Stage Cooling Low Limit


Two-Stage Cooling LockoutIf the outdoor air temperature drops below Clg 2 Lockout, CoolingStage 2 is disabled, while Cooling Stage 1 continues to operate.Cooling Stage 2 remains disabled until the outdoor air temperaturerises above Clg 2 Lockout by 2ºC (2ºF). The Clg 2 Lock Statparameter displays the status of Clg 2 Lockout.

If the outdoor air temperature drops below Clg 1 Lockout, CoolingStage 1 is disabled, regardless of cooling demand. Cooling Stage 1remains disabled until the outdoor air temperature rises above theClg 1 Lockout value by 2ºC (2ºF). The Clg 1 Lock Stat parameterdisplays the status of Clg 1 Lockout.

Clg 1 Lockout

Clg 2 Lockout 1

1. Cooling Stage 2 is disabled.2. Cooling Stage 1 is disabled.3. Stage 1 is available.4. Stage 2 is available.

CoolingCooling

2

3

4


clglock

2 C (2 F)o o

2 C (2 F)o o

Figure 2-9: Staged Cooling Lockout

Four-Stage Cooling CommandCooling Command equals the largest zone demand for cooling.






A Shutdown command causes all stages to turn off immediately, evenif the minimum on time of each binary output has not expired. Theminimum off time of each binary output must be satisfied when thecontroller comes out of Shutdown mode.

Clg Stg 2 Start

Clg Stg 1 Start

Clg Stg 1 Diff

1

1. Cooling Stage 1 energizes.2. Cooling Stage 2 energizes.3. Cooling Stage 3 energizes.4. Cooling Stage 4 energizes.5. Cooling Stage 4 de-energizes.6. Cooling Stage 3 de-energizes.7. Cooling Stage 2 de-energizes.8. Cooling Stage 1 de-energizes.

CoolingCommand

4stgclg

Clg Stg 2 Diff

Clg Stg 3 Diff

Clg Stg 4 Diff

Clg Stg 3 Start

Clg Stg 4 Start 4

3

2

6

7

8

5

Figure 2-10: Four-Stage Cooling Command


Four-Stage Cooling Low LimitIf the discharge air temperature drops below Clg Lo Limit 2, CoolingStages 3 and 4 are disabled, and the cooling command drops to 60%.Cooling Stages 3 and 4 remain disabled until the discharge airtemperature rises above the Clg Lo Limit 2 by a number of degreesequal to the Lo Limit Diff value.

If the discharge air temperature drops below Clg Lo Limit 1, thecooling command is forced to 0%, and Cooling Stages 1 and 2 aredisabled. Cooling Stages 1 and 2 remain disabled until the dischargeair temperature rises above Clg Lo Limit 1 by a number of degreesequal to the Lo Limit Diff value.

The normal/alarm state displays through the Lo Limit Status wheneither low limit condition exists. The cooling command is forced to0% if air status (supply fan and airflow switch) is not proven, or if thecontroller is placed in Purge or Shutdown mode.

Clg Lo Limit 1

Clg Lo Limit 2

Lo Limit Diff

1

1. Cooling Stages 3 and 4 are disabled.2. Cooling Stages 1 and 2 are disabled3. Cooling Stages 1 and 2 are available.4. Cooling Stages 3 and 4 are available.

.

2

Lo Limit Diff

3

4


clglow4

Figure 2-11: Four-Stage Cooling Low Limit


Four-Stage Cooling LockoutIf the outdoor air temperature drops below Clg 2 Lockout, CoolingStages 3 and 4 are disabled, while Cooling Stages 1 and 2 continue tooperate. Cooling Stages 3 and 4 remain disabled until the outdoor airtemperature rises above Clg 2 Lockout by 2ºC (2ºF). The Clg 2 LockStat parameter displays the status of Clg 2 Lockout.

If the outdoor air temperature drops below Clg 1 Lockout, CoolingStages 1 and 2 are disabled, regardless of cooling demand. CoolingStages 1 and 2 remain disabled until the outdoor air temperature risesabove the Clg 1 Lockout value by 2ºC (2ºF). The Clg 1 Lock Statparameter displays the status of Clg 1 Lockout.

Clg 1 Lockout

Clg 2 Lockout 1

1. Cooling Stages 3 and 4 are disabled.2. Cooling Stages 1 and 2 are disabled.3. Stages 1 and 2 are available.4. Stages 3 and 4 are available.

CoolingCooling

2

3

4


clglock4

2 C (2 F)o o

2 C (2 F)o o

Figure 2-12: Four-Stage Cooling Lockout


Fan ControlThe Supply Fan binary output cycles on/off with a call for heating orcooling if the controller is in Unoccupied mode or if the controller is inOccupied mode and BI1, Fan Operation, is jumpered to 24 VAC.

The supply fan energizes under the following conditions:

• The controller is in Cooling mode and the Cooling Command isgreater than the Clg Stg 1 Start. The supply fan shuts off when theCooling Command decreases below the Clg Stg 1 Start by a valueequal to the Clg Stg 1 Diff value.

• The controller is in Heating mode and the Heating Command isgreater than the Htg Stg 1 Start. The supply fan shuts off when theHeating Command is less than the Htg Stg 1 Start by a value equalto the Htg Stg 1 Diff value.

• The controller is in Heating mode and the Heating Command isgreater than the Mod Htg Start. The supply fan shuts off when theHeating Command is less than the Mod Htg Start by a value equalto the Mod Htg Diff value.

• The system controlling Room/Return Temp/analog input(see Rooftop Single Zone [Standalone] PI Control in this chapter)generates an economizer command greater than 5% open. Thesupply fan shuts off when the economizer command dropsbelow 1%.

• A Vent Command or Purge Command is issued.

Note: When any of the previous conditions become False, the FanPurge Time keeps the fan running for the user-defined period to purgethe system of any latent heating or cooling.

The supply fan runs continuously when the UNT operates in theOccupied mode without a jumper wire on the Fan Operation terminals.The Supply Fan binary output is On if the controller is in Occupiedmode without a jumper wired across BI1, Fan Operation.

Switching to the Unoccupied mode during a call for heating or coolingcan cause the user-defined Fan Purge Time to keep the fan running topurge the system.

Under normal operation after startup, the Supply Fan Alarm energizes15 seconds after a loss of airflow. The supply fan is commanded Off20 seconds after a loss of airflow occurs. The controller must undergoa mode change (Unoccupied/Occupied, Shutdown on/off) before thesupply fan can restart. The alarm clears when airflow is proven.


The controller indicates a Supply Fan Alarm 15 seconds after thesupply fan is energized if BI4 (Supply Airflow) does not match BO1(Supply Fan). This alarm automatically resets if airflow is provenwithin two minutes of issuing the fan start command. If airflow is notproven, the supply fan is commanded Off and the Supply Fan Alarm islatched in an alarm state. The controller must undergo a mode change(Unoccupied/Occupied, Shutdown on/off) before the supply fanrestarts. The alarm clears when airflow is proven.

The supply fan does not operate when the controller is in Shutdownmode.

Note: If BO1, Supply Fan, or the BI4, Supply Airflow, is Off forlonger than three seconds, all heating and cooling stages arecommanded Off.

Restart DelayThe restart delay is an adjustable time value that delays the controllerfor a specified amount of time during power up or after a reset. Thecontroller remains in Shutdown mode until the restart delay expires;then it begins active control.

The restart delay for each controller can be adjusted to stagger therestarts of multiple controllers (to prevent all controllers from startingsimultaneously). This may be done for reasons such as limitingdemand spikes. Restart delays may be staggered by zone, by floor, orby area.

Note: After a controller restart, the controller drives incrementaldamper actuators full open and incremental valve actuators full closedfor 1.5 times their individual stroke times to synchronize the actuators.


Shutdown ModeShutdown mode shuts down the controlled devices of the rooftopcontroller. In Shutdown mode:

• Supply fan is turned off.

• Economizer is fully closed.

• All heating and cooling stages are turned off immediately, even ifthe minimum on timers have not expired.

• Any minimum off times for the staged heating and cooling outputsmust be satisfied when the controller comes out of a Shutdownmode.

• Heating and cooling commands are forced to 0%.

• Discharge air low limit integration time is disabled.

• Heating and cooling integration time for single zone control isdisabled.

Rooftop Single Zone (Standalone) PI ControlThe rooftop unit reverts to single zone control if the Auto mode binaryinput is closed or if N2 communication is lost for 10 minutes. If ZoneControl equals No, the rooftop is performing Return Air Control of asingle zone.

Note: The parameters in Table 2-8 listed as RT and RT-Sapplications apply to the standalone rooftop application.

Setpoints for proportional plus integral (PI) control are determined asfollows:

• If Occupied Status equals On, the value of AI2, Warm/CoolAdjust, is added to the Occupied Setpoint to determine thecalculated setpoint. The Occupied Dead Band is subtracted fromthis calculated setpoint to determine the Actual Htg Setpt or addedto the calculated setpoint to determine the Actual Clg Setpt.

• If Occupied Status equals Off, the value of AI2, Warm/CoolAdjust, is added to the Unoccupied Setpoint to determine thecalculated setpoint. The Unoccupied Dead Band is subtracted fromthis calculated setpoint to determine the Actual Htg Setpt or addedto the calculated setpoint to determine the Actual Clg Setpt.

The value of the Econ PBand is also used as the cooling deadbandwhen free cooling is available.

Air status must be proven and the unit cannot be in Shutdown modefor the Htg Int Tm and Clg Int Tm to be in effect.


As AI1, Room/Return Temp, increases above the Actual Cooling Setptthrough the economizer proportional band, an economizer commandof 0-100% results. If Room/Return Temp continues to increasethrough the Clg Pband, a cooling command of 0-100% results. AsRoom/Return Temp decreases below the Actual Heating Setpt throughthe Htg PBand, a heating command of 0-100% results. Theheating/cooling commands are forced to 0% if the room/return sensorgoes unreliable.


Procedure OverviewTable 2-4: Procedure Overview

To Do This Follow These Steps:Create the Rooftop Applicationin HVAC PRO Software

Open the File menu. Select New. Select Application Group: CommercialZoning Applications. Select Application: Rooftop (UNT). Select Rooftop(Standard) for rooftop units with two stages of heating and two stages ofcooling; select Rooftop with 4 Clg and Modulated Gas for rooftop unitswith four stages of cooling and modulated gas heating.

Adjust Rooftop Parameters Select the Params button in HVAC PRO software. Scroll through theparameters list and find the desired parameter. Refer to Table 2-5 for alist of adjustable rooftop parameters. Adjust the parameter as desired.

Monitor Rooftop Parameters Select the Params button in HVAC PRO software. Scroll through theparameters list and find the desired parameter. Refer to Table 2-6 for alist of monitor-only rooftop parameters.

Download the RooftopApplication to the UNTController

Open the File menu. Select Save As. Select UNT121-1 orAS-UNT1126-0 from the Devices box. Enter a file name for theapplication and select OK. Open the Download menu. Select CurrentConfiguration…. Enter the N2 address of the UNT rooftop controller andselect OK.


Detailed Procedures

Creating the Rooftop Application in HVAC PRO SoftwareTo create the rooftop application in HVAC PRO Software:

1. Open the File menu.

2. Select New.

3. Select Application Group: Commercial Zoning Applications.

4. Select Application: Rooftop (UNT).

5. Select Rooftop (Standard) for rooftop units with two stages ofheating and two stages of cooling; select Rooftop with 4 Clg andModulated Gas for rooftop units with four stages of cooling andmodulated gas heating.

For more information on HVAC PRO software, refer to theHVAC PRO User’s Guide.

Adjusting Rooftop ParametersTo adjust rooftop parameters:

1. Select the Params button in HVAC PRO software.

2. Scroll through the parameters list and find the desired parameter.Refer to Table 2-5 for a list of adjustable rooftop parameters.

3. Adjust the parameter as desired.

Refer to the Viewing and Modifying Configuration Parameters(LIT-63750410) chapter in the HVAC PRO User’s Guide for moreinformation on using parameters.


Table 2-5: Adjustable Rooftop Parameters

To AdjustThis

Use TheseParameters

To Do This

RooftopController

Restart Delay Modify the restart delay of the controller or stagger controllerrestarts.

Shutdown Command Shut down the controller.

Heating andCooling

Priority Selection Select Manual or Automatic Heating/Cooling priority.

Htg/Clg Priority Set the rooftop unit to heating or cooling priority if the PrioritySelection parameter equals Manual.

OAT Changeover Adjust the changeover point for automatic heating or coolingpriority (only applies if Priority Selection parameter is set toAuto).

Htg Hi Limit 1 Disable Heating Stage 1 according to discharge air temperature.

Htg Hi Limit 2 Disable Heating Stage 2 according to discharge air temperature.

Hi Limit Diff Determine how many degrees the discharge air temperaturemust drop below each Htg Hi Limit before the associated stageof heating is available.

Clg Lo Limit 1 Disable Cooling Stage 1* according to discharge air temperature.

Clg Lo Limit 2 Disable Cooling Stage 2** according to discharge airtemperature.

Lo Limit Diff Determine how many degrees the discharge air temperaturemust rise above each Clg Lo Limit before the associated stage ofcooling is available.

Htg 1 Lockout Disable Heating Stage 1 according to outdoor air temperature.

Htg 2 Lockout Disable Heating Stage 2 according to outdoor air temperature.

Clg 1 Lockout Disable Cooling Stage 1* according to outdoor air temperature.

Clg 2 Lockout Disable Cooling Stage 2** according to outdoor air temperature.

Htg Stg 1 Start Energize Heating Stage 1 at a user-defined Heating Command.

Htg Stg 1 Diff Determine how many percentage points the Heating Commandmust drop below Htg Stg 1 Start before Heating Stage 1de-energizes.

Htg Stg 2 Start Energize Heating Stage 2 at a user-defined Heating Command.

Htg Stg 2 Diff Determine how many percentage points the Heating Commandmust drop below Htg Stg 1 Start before Heating Stage 1de-energizes.

Mod Htg Start Initiate modulated gas heating at a user-defined HeatingCommand.

Mod Htg Diff Determine how many percentage points the Heating Commandmust drop below Mod Htg Start before modulated gas shuts off.

Clg Stg 1 Start Energize Cooling Stage 1* at a user-defined Cooling Command.

Clg Stg 1 Diff Determine how many percentage points the Cooling Commandmust drop below Clg Stg 1 Start before Cooling Stage 1*de-energizes.

Clg Stg 2 Start Energize Cooling Stage 2** at a user-defined Cooling Command.

Clg Stg 2 Diff Determine how many percentage points the Cooling Commandmust drop below Clg Stg 2 Start before Cooling Stage 2**de-energizes.

Continued on next page . . .

* Cooling Stages 1 and 2, if the rooftop unit has four stages of cooling.** Cooling Stages 3 and 4, if the rooftop unit has four stages of cooling.


To AdjustThis (Cont.)

Use TheseParameters

To Do This

ZoneResponse

Zone Unresponse Time Adjust the amount of time that must elapse before zonesbecome unresponsive when zone demand equals ±100%.

Economizer Minimum Pos Adjust the economizer minimum position.

Economizer Offset Adjust the offset to the economizer position.

Drybulb Econ SP Adjust the outdoor air dry bulb changeover point.

OA Enthalpy SP Adjust the outdoor air dry enthalpy changeover point.

Vent Command Open the economizer to 100%, while HVAC equipmentcontinues operating, for constant ventilation.

Purge Command Open the economizer to 100% and shut off all HVACequipment for purging system air of volatile contents.

Fan Purge Time Adjust how long the fan runs after all heating and coolingstages shut down.

Carbon Dioxide CO2 Reset Band Adjust the carbon dioxide reset band.

CO2 Low Limit Adjust the carbon dioxide low limit.

Min Pos RBand Set the percentage added to the economizer Minimum Pos.When carbon dioxide exceeds the CO2 Low Limit parameter,the Min Pos Rband value is added to Minimum Pos.

Dis Air LL Int Tm Adjust the integration time for discharge air low limit.Discharge AirLow Limit Dis Air LL DBand Adjust the deadband for the discharge air low limit.

Dis Air Low Lim Adjust the discharge air low temperature limit.

Dis Air LL PBand Adjust the proportional band for the discharge air low limit.

Monitoring Rooftop ParametersTo monitor rooftop parameters:

1. Select the Params button in HVAC PRO software.

2. Scroll through the parameters list and find the desired parameter.Refer to Table 2-6 for a list of monitor-only rooftop parameters.

Refer to the Viewing and Modifying Configuration Parameters(LIT-63750410) chapter in the HVAC PRO User’s Guide for moreinformation on using parameters.


Table 2-6: Monitor-only Rooftop Parameters

To MonitorThis

Use TheseParameters

To Do This

RooftopController

Restart Status Determine if the controller is in a restart delay. If so,Restart Status equals On.

Shutdown Status Determine if the controller is shut down. If so, ShutdownStatus equals On.

Heating andCooling

Heating Command View the size of the largest zone demand for heating.

Cooling Command View the size of the largest zone demand for cooling.

Cmnd to Htg Seq View the command issued to the BO Sequencer. Cmnd toHtg Seq may not match Heating Command.

Cmnd to Clg Seq View the command issued to the BO Sequencer. Cmnd toClg Seq may not match Cooling Command.

Hi Limit Status Determine if discharge air has exceeded the high limit.

Lo Limit Status Determine if discharge air has exceeded the low limit.

Heating Mode Determine if the rooftop unit is in Heating mode. If so,Heating Mode equals On, and cooling is locked out.

Cooling Mode Determine if the rooftop unit is in Cooling mode. If so,Cooling Mode equals On, and heating is locked out.

Htg 1 Lock Stat Determine if Heating Stage 1 is locked out. If so, Htg 1Lock Stat equals On.

Htg 2 Lock Stat Determine if Heating Stage 2 is locked out. If so, Htg 2Lock Stat equals On.

Clg 1 Lock Stat Determine if Cooling Stage 1* is locked out. If so, Clg 1Lock Stat equals On.

Clg 2 Lock Stat Determine if Cooling Stage 2** is locked out. If so, Clg 2Lock Stat equals On.

Diagnostics Htg Stg 1 Duty Cycle View the Heating Stage 1 duty cycle.

Htg Stg 2 Duty Cycle View the Heating Stage 2 duty cycle.

Clg Stg 1 Duty Cycle View the Cooling Stage 1 duty cycle.

Clg Stg 2 Duty Cycle View the Cooling Stage 2 duty cycle.

Clg Stg 3 Duty Cycle View the Cooling Stage 3 duty cycle (if applicable).

Clg Stg 4 Duty Cycle View the Cooling Stage 4 duty cycle (if applicable).

Htg Stg 1 CPH View the Heating Stage 1 cycle per hour.

Htg Stg 2 CPH View the Heating Stage 2 cycles per hour.

Clg Stg 1 CPH View the Cooling Stage 1 cycle per hour.

Clg Stg 2 CPH View the Cooling Stage 2 cycles per hour.



Economizer Duty Cycle View the Economizer actuator duty cycle.

EWMA Heating Command View the Exponentially weighted moving avg heatingcommand.

EWMA Cooling Command View the Exponentially weighted moving avg coolingcommand.


* Cooling Stages 1 and 2, if the rooftop unit has four stages of cooling.** Cooling Stages 3 and 4, if the rooftop unit has four stages of cooling.


To MonitorThis (Cont.)

Use TheseParameters

To Do This

Supply Fan Supply Fan Alarm Determine if the Supply Fan Command matches FanStatus. If Supply Fan Alarm equals Alarm, Supply FanCommand does not match Fan Status.

Zone Demands Zone Demand n View the size of a zone demand where n is the number ofthe zone. A negative (-) demand is a call for heating; apositive (+) demand is a call for cooling.

Zone Control Determine if N2 communication is present. If so, ZoneControl equals Yes. The rooftop unit is zoning if ZoneControl equals Yes and BI3, Auto Mode, is not jumpered.

Zone Response Zone n Response View the responsiveness of a zone. Normal indicates aresponsive zone; Alarm indicates an unresponsive zone.

Downloading the Rooftop Application to the UNT ControllerTo download the rooftop application to the UNT rooftop controller:

1. Open the File menu.

2. Select Save As.

3. Select UNT121-1 or AS-UNT1126-0 from the Devices box.

4. Enter a file name for the application and select OK.

5. Open the Download menu.

6. Select Current Configuration.

7. Enter the N2 address of the UNT rooftop controller and select OK.


Table 2-7: Rooftop Inputs and Outputs

PointType

PointAddress

Long Name ShortName

Units Description

AI 1 Room/ReturnTemperature

ZN-T Deg F Deg C Return Air Temp for multi-zone, Room orReturn Air Temp for single zone, see BI3

AI 2 Remote Adjust W-C-ADJ Deg F Deg C Remote Setpoint Adjustment

AI 3 Carbon Dioxide CO2-L PPM PPM Carbon Dioxide

AI 4 Discharge Air DA-T Deg F Deg C Discharge Air Temperature

AI 5 Outdoor Air Temp OA-T Deg F Deg C Outdoor Air Temperature

AI 6 OA Rel Humid OA-H % RH % RH Outdoor Air Relative Humidity

BI 1 Fan Operation FANOP-S Contin Inter Fan Operation (continuous orintermittent)

BI 2 Dirty Filter Switch FILTER-S Open Closed Dirty Air Filter Switch

BI 3 Auto Mode AUTOMODE Multi Room Auto Mode; multi-zone (zoning) or singlezone (standalone) rooftop control

BI 4 Supply Airflow SF-S Off On Supply Airflow Status

AO 1* Mod Htg Prop Valve HTG-VLV % % Modulated Heating Proportional Valve(modulated gas heating application only)

AO 2 Damper Command DPR-O % % Economizer Damper Command

BO 1 Supply Fan SF-C Off On Supply Fan Command

BO 2* Htg Stg 1 HTG1-C Off On Heating Stage 1

BO 3* Htg Stg 2 HTG2-C Off On Heating Stage 2

BO 5* Clg Stg 1 CLG1-C Off On Cooling Stage 1

BO 6* Clg Stg 2 CLG2-C Off On Cooling Stage 2

BO 3, 4, 5, 6* Clg Stg 1, 2, 3, 4 CLGn-C Off On Cooling Stages 1-4(4-stage cooling application only)

* This output may change or disappear from the application based on the Q&A session in HVAC PROsoftware.


Table 2-8: Rooftop Parameters

Long Name PT1

PA2 Short

NameValue

3 Units App4 Description

Actual Clg Setpt ADF 40 * Act CSP n n Deg F Deg C RT-S Common setpoint + coolingdeadband + warm/cool adjust

Actual Htg Setpt ADF 41 * Act HSP n n Deg F Deg C RT-S Common setpoint - heatingdeadband + warm/cool adjust

Auto Zero Delay ADF 238 AZ Delay 10.0 10.0 Minute Minute RT Time delay before actuator isclosed

Auto Zero Status BD 18 * AZ Stat 0 1 Off On RT N2 read-only BD (Binary Data)indicates Auto Zero is inprogress

Clg 1 Lock Stat BD 32 * Clg1 LS 0 1 Off On RT Lockout status of CoolingStage 1

Clg 1 Lockout ADF 152 Clg1 Loc 40.0 4.0 Deg F Deg C RT Cooling Stage 1 Lockout

Clg 2 Lock Stat BD 33 * Clg2 LS 0 1 Off On RT Lockout status of CoolingStage 2

Clg 2 Lockout ADF 153 Clg2 Loc 45.0 7.0 Deg F Deg C RT Cooling Stage 2 Lockout

Clg Int Tm ADF 208 Clg Int 0 0 RT-S Integration time for the rooftopunit cooling loop

Clg Lo Limit 1 ADF 225 Clg LL1 45.0 7.0 Deg F Deg C RT Cooling Stage 1 Low Limit fordischarge air temperature

Clg Lo Limit 2 ADF 226 Clg LL2 50.0 10.0 Deg F Deg C RT Cooling Stage 2 Low Limit fordischarge air temperature

Clg PBand ADF 229 Clg PB 2.0 1.0 Deg F Deg C RT-S Proportional band for therooftop unit coolingtemperature loop

Clg Stg 1 CPH ADF 52 * Cl1CPH n n CPH CPH RT Cooling Stage 1 Cycles PerHour

Clg Stg 1 Diff ADF 159 CStg1Dif 40.0 40.0 %Cmd

%Cmd

RT Cooling Stage 1 Differential(2-stage cooling application)


%Cmd


Clg Stg 1 DutyCycle

ADF 46 * Cl1DtyCy n n % % RT Cooling Stage 1 Duty Cycle

Clg Stg 1 Start ADF 158 CStg1Str 50.0 50.0 %Cmd

%Cmd

RT Cooling Stage 1 Start Limit(2-stage cooling application)

Clg Stg 1 Start ADF 158 CStg1Str 25.0 25.0 %Cmd

%Cmd

RT Cooling Stage 1 Start Limit(4-stage cooling application)

Clg Stg 2 CPH ADF 53 * Cl2CPH n n CPH CPH RT Cooling Stage 2 Cycles PerHour


%Cmd



1. Point Type

2. Point Address

3. n = number determined by the application

4. Application (RT = Rooftop [both multi-zone and single zone], RT-M = multi-zone [zoning] only, RT-S = singlezone [standalone] only)

* Indicates point is monitor-only (read-only).


Long Name(Cont.)

PT1

PA2 Short

NameValue


Clg Stg 2 Diff ADF 161 CStg2Dif 30.0 30.0 % Cmd % Cmd RT Cooling Stage 2Differential (4-stagecooling application)

Clg Stg 2 DutyCycle

ADF 47 * Cl2DtyCy n n % % RT Cooling Stage 2 DutyCycle

Clg Stg 2 Start ADF 160 CStg2Str 99.0 99.0 % Cmd % Cmd RT Cooling Stage 2 Start Limit(2-stage coolingapplication)

Clg Stg 2 Start ADF 160 CStg2Str 50.0 50.0 % Cmd % Cmd RT Cooling Stage 2 Start Limit(4-stage coolingapplication)

Clg Stg 3 CPH ADF 54 * Cl3CPH n n CPH CPH RT Cooling Stage 3 CyclesPer Hour

Clg Stg 3 Diff ADF 244 CStg3Dif 45.0 45.0 % Cmd % Cmd RT Cooling Stage 3Differential

Clg Stg 3 DutyCycle


Clg Stg 3 Start ADF 243 CStg3Str 75.0 75.0 % Cmd % Cmd RT Cooling Stage 3 Start Limit

Clg Stg 4 CPH ADF 55 * Cl4CPH n n CPH CPH RT Cooling Stage 4 CyclesPer Hour

Clg Stg 4 Diff ADF 246 CStg4Dif 59.0 59.0 % Cmd % Cmd RT Cooling Stage 4Differential

Clg Stg 4 DutyCycle


Clg Stg 4 Start ADF 245 CStg4Str 99.0 99.0 % Cmd % Cmd RT Cooling Stage 4 Start Limit

Cmnd to Clg Seq AO 5 CmdClSeq n n % % RT Cooling PI Cmd unlesslimited by lockout or other

Cmnd to Htg Seq AO 4 CmdHtSeq n n % % RT Heating PI Cmd unlesslimited by lockout or other

CO2 Low Limit ADF 217 CO2 LoLm 800 800 ppm ppm RT Indoor air quality low limitsetpoint

CO2 Reset Band ADF 218 CO2 RB 200 200 ppm ppm RT Indoor air quality resetband

CoolingCommand

AO 6 * Clg Cmd n n % % RT The largest positiveresponsive Zone Demand

Cooling Mode BD 35 * Clg Mode 0 1 Off On RT Clg Cmd > Clg Stg 1 Start.Heating is disabled.

Dis Air LLDBand

ADF 242 DALL DB n n Deg F Deg C RT Deadband for thedischarge air low limit

Dis Air LL Int Tm ADF 241 DALL Int 0 0 Second Second RT Integration time fordischarge air low limit

Dis Air LLPBand

ADF 223 DALL PB -20.0 -11.0 Deg F Deg C RT Proportional band for thedischarge air low limit


1. Point Type

2. Point Address


4. Application (RT = Rooftop [both multi-zone and single zone], RT-M = multi-zone [zoning] only,RT-S = single zone [standalone] only)



Long Name(Cont.)

PT1

PA2 Short

NameValue


Dis Air Low Lim ADF 222 DA LoLm 55.0 13.0 Deg F Deg C RT Discharge Air TemperatureLow Limit

Drybulb Econ SP ADF 214 DryBlbSP 68.0 20.0 Deg F Deg C RT Economizer switchoverdefault OA dry bulb setpoint

Econ PBand ADF 209 Econ PB 2.0 1.0 Deg F Deg C RT-S Proportional band for thezone economizer loop

Econ Status BD 16 * EconStat 0 1 Off On RT Economizer suitability - drybulb and single enthalpy

EconomizerDuty Cycle

ADF 56 * EcnDtyCy n n % % RT Economizer actuator DutyCycle

EconomizerOffset

ADF 224 EconOfst n n % % RT Damper can never closepast this position

EWMA HeatingCommand

ADF 57 HtgCmdMA n n % % RT Exponentially weightedmoving average of HeatingCommand

EWMA CoolingCommand

ADF 58 ClgCmdMA n n % % RT Exponentially weightedmoving average of CoolingCommand

Fan Purge Time ADF 162 FanPurge 2.0 2.0 Minute Minute RT Fan run time (min) afterhtg/clg (econ) prop cmd goesto 0%

HeatingCommand

AO 7 * Htg Cmd n n % % RT The largest negativeresponsive Zone Demand

Heating Mode BD 34 * Htg Mode 0 1 Off On RT Htg Cmd > Htg Stg 1 Start.Cooling is disabled.

Hi Limit Diff ADF 192 HiLimDif 10.0 5.0 Deg F Deg C RT High Limit Differential

Hi Limit Status BD 18 * HiLmStat 0 1 Off On RT Discharge air high limitstatus

Htg 1 Lock Stat BD 30 * Htg1 LS 0 1 Off On RT Lockout status of HeatingStage 1

Htg 1 Lockout ADF 149 Htg1 Loc 70.0 22.0 Deg F Deg C RT Heating Stage 1 Lockout

Htg 2 Lock Stat BD 31 * Htg2 LS 0 1 Off On RT Lockout status of HeatingStage 2

Htg 2 Lockout ADF 151 Htg2 Loc 65.0 20.0 Deg F Deg C RT Heating Stage 2 Lockout

Htg Hi Limit ADF 240 Htg HiLm 140.0 60.0 Deg F Deg C RT Heating High Limit fordischarge air temperature

Htg Hi Limit 1 ADF 190 Htg HiL1 150.0 65.0 Deg F Deg C RT Heating Stage 1 High Limitfor discharge airtemperature

Htg Hi Limit 2 ADF 191 Htg HiL2 140.0 60.0 Deg F Deg C RT Heating Stage 2 High Limitfor discharge airtemperature


1. Point Type

2. Point Address





Long Name(Cont.)

PT1

PA2 Short

NameValue


Htg Int Tm ADF 207 Htg Int 0 0 Second Second RT-S Integration time for the rooftopunit heating loop

Htg Lockout ADF 149 HtgLock 70.0 22.0 Deg F Deg C RT Heating Lockout for modulatedheating

Htg Lockout Stat BD 30 * HtgLStat 0 1 Off On RT Lockout status for modulatedheating valve

Htg PBand ADF 211 Htg PB -2.0 -1.0 Deg F Deg C RT-S Proportional band for therooftop unit heatingtemperature loop

Htg Stg 1 CPH ADF 50 * Ht1CPH n n CPH CPH RT Heating Stage 1 Cycles PerHour

Htg Stg 1 Diff ADF 155 HStg1Dif 40.0 40.0 % Cmd % Cmd RT Heating Stage 1 Differential

Htg Stg 1 DutyCycle

ADF 34 * Ht1DtyCy n n % % RT Heating Stage 1 Duty Cycle

Htg Stg 1 Start ADF 154 HStg1Str 50.0 50.0 % Cmd % Cmd RT Heating Stage 1 Start Limit

Htg Stg 2 CPH ADF 51 * Ht2CPH n n CPH CPH RT Heating Stage 2 Cycles PerHour

Htg Stg 2 Diff ADF 157 HStg2Dif 60.0 60.0 % Cmd % Cmd RT Heating Stage 2 Differential

Htg Stg 2 DutyCycle

ADF 45 * Ht2DtyCy n n % % RT Heating Stage 2 Duty Cycle

Htg Stg 2 Start ADF 156 HStg2Str 99.0 99.0 % Cmd % Cmd RT Heating Stage 2 Start Limit

Htg/Clg Priority BD 162 H/C Prio 0 1 Clg Htg RT Heating/Cooling Priority, setmanually or by Outdoor AirTemperature

Lo Limit Diff ADF 227 ClgLLDif 5.0 2.5 Deg F Deg C RT Low Limit Differential fordischarge air temperature

Lo Limit Status BD 17 * LoLmStat 0 1 Off On RT Discharge air low limit status

Min Pos RBand ADF 219 MinPosRB 50.0 50.0 % % RT Minimum position reset band

Minimum Pos ADF 221 Min Pos 10.0 10.0 % % RT Minimum economizer damperposition setpoint

Mod Htg Diff ADF 213 ModHtDif 5.0 5.0 % % RT Modulated Heating Differential

Mod Htg Start ADF 212 ModHtStr 20.0 20.0 % % RT Modulated Heating Start Limit

OA Enthalpy ADF 39 * OA Enth n n BTU/lb KCl/kg RT OA Enthalpy

OA Enthalpy Diff ADF 216 OAEnthDf 1.0 0.5 BTU/lb KCl/kg RT Economizer switchoveroutdoor air enthalpydifferential

OA Enthalpy SP ADF 215 OAEnthSP 26 14 BTU/lb KCl/kg RT Economizer switchoveroutdoor air enthalpy setpoint

OATChangeover

ADF 206 OATChgOv 50.0 10.0 Deg F Deg C RT Outdoor Air TemperatureChangeover for Htg/Clg Priority

Occ Ovrd Time ADF 169 Occ OT 180 180 Minute Minute RT Time duration of TemporaryOccupied mode


1. Point Type

2. Point Address


4. Application (RT = Rooftop [both multi-zone and single zone], RT-M = multi-zone [zoning] only, RT-S = singlezone [standalone] only)



Long Name(Cont.)

PT1

PA2 Short

NameValue


OccupiedCommand

BD 227 Occ Cmd 0 1 Off On RT Occupied Command

Occupied DeadBand

ADF 131 Occ DB 1.0 0.5 Deg F Deg C RT-S Occupied Deadband

OccupiedSetpoint

ADF 129 Occ Setp 72.0 22.0 Deg F Deg C RT-S Occupied Setpoint

Occupied Status BD 22 * Occ Stat 0 1 Off On RT Occupied Status

PrioritySelection

BD 230 PriorSel 0 1 Auto Manual RT Heating/Cooling PrioritySelection

Purge Command BD 194 PurgMode 0 1 Off On RT Purge Command

Restart Delay ADF 185 RstrtDel 1.0 1.0 Minute Minute RT Temporary delay initiated aftera controller reset

Restart Status BD 21 * Res Stat 0 1 Off On RT A restart delay is in progresswhen Restart Status equals On.

ShutdownCommand

BD 228 ShutCmd 0 1 Off On RT Shutdown Command

Supply FanAlarm

BD 19 * Fan Alrm 0 1 Normal Alarm RT Indicates fan command and airflow are not in the same state.

Temp OccStatus

BD 14 * TOccStat 0 1 Off On RT N2 read-only BD indicatesTemporary Occupied timer isactive.

TMZ LowSetpoint Limit

ADF 127 TMZ LSL 65.0 18.3 Deg F Deg C RT TMZ low setpoint limit forComfort Setpoint

TMZ HighSetpoint Limit

ADF 128 TMZ HSL 78.0 25.5 Deg F Deg C RT TMZ high setpoint limit forComfort Setpoint

UnoccupiedDead Band

ADF 132 Unoc DB 10.0 6.0 Deg F Deg C RT-S Unoccupied Deadband

UnoccupiedSetpoint

ADF 130 Uno Setp 72.0 22.0 Deg F Deg C RT-S Unoccupied Setpoint

Vent Command BD 193 VentMode 0 1 Off On RT Vent command

Vent Mode BD 15 * VentMode 0 1 Off On RT Vent command has beenissued.

Vent Mode Delay ADF 205 Vent Dly 5.0 5.0 Minute Minute RT Vent Mode Delay. A pointmapped into an N30 Seriescontroller or BAS system tocontrol timer values from ahead end. Use HVAC PROsoftware to adjust the VentMode Duration.

Vent Mode DmpCmnd

ADF 203 VDmpCmd 50.0 50.0 % % RT Vent Mode Damper Command

Vent Mode TempDiff

ADF 202 VTmpDiff 3.0 1.0 Deg F Deg C RT Vent Mode Temp Differential


1. Point Type

2. Point Address





Long Name(Cont.)

PT1

PA2 Short

NameValue


Zone 1Response

BD 36 * Zn1Resp 0 1 Norm Alm RT-M Zone 1 is unresponsive if result= Alm (per unresponse time).

Zone 2Response


Zone 3Response


Zone 4Response


Zone 5Response


Zone 6Response


Zone 7Response


Zone 8Response


Zone 9Response


Zone 10Response


Zone 11Response


Zone 12Response


Zone 13Response


Zone 14Response


Zone 15Response


Zone Control BD 20 * Zne Cntl 0 1 No Yes RT N2 read-only BD indicatesN2 communication is present.

Zone Demand 1 ADF 170 ZneDmd1 n n % % RT-M Zone Demand from Zone 1










1. Point Type

2. Point Address





Long Name(Cont.)

PT1

PA2 Short

NameValue








ZoneUnresponseTime

ADF 163 ZU Time 240.0 240.0 Minute Minute RT-M Time before Zone Demand nis ignored if heating or coolingcommand equals 100%, andthe controller is in therespective Heating or Coolingmode.

1. Point Type

2. Point Address




Controls Group507 E. Michigan StreetP.O. Box 423 www.johnsoncontrols.comMilwaukee, WI 53201 Published in U.S.A.

02 metasys zoning package user's guide: zoning the rooftop ... · when free cooling is...

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