Programming HVAC System Parameters Technical Bulletin

Refrigeration Systems Technical Manual 804HVAC Parameters Section

Issue Date 0699

© 1999 Johnson Controls, Inc. www.johnsoncontrols.comCode No. LIT-804300

TECHNICAL BULLETIN

Programming HVAC System Parameters

Viewing HVAC System Information ....................................................5

Introduction......................................................................................................... 5

Key Concepts...................................................................................................... 6

HVAC Control..................................................................................................................6

HVAC Input Status Screen ..............................................................................................6

HVAC Output Status Screen ...........................................................................................7

Procedure Overview........................................................................................... 8

Detailed Procedures........................................................................................... 9

Viewing the Status of an HVAC Zone ..............................................................................9

Viewing the Status of Heating and Cooling Stages for Each Zone...................................9

Viewing Runtimes for Each Stage .................................................................................10

Viewing HVAC Zone Logs .............................................................................................11

Setting Up HVAC Zone Information ..................................................13

Introduction....................................................................................................... 13

Key Concepts.................................................................................................... 14

Passwords.....................................................................................................................14

HVAC Zone Name Setup ..............................................................................................14

Heating and Cooling Differentials ..................................................................................14

Heating and Cooling Time Delays .................................................................................15

Lockouts........................................................................................................................15

Dehumidification Sensor Type.......................................................................................15

Dehumidification Deadband...........................................................................................15

HVAC Parameters2

Fan Operation ...............................................................................................................15

Night Setback ................................................................................................................16

HVAC Zone Logs ..........................................................................................................16

Procedure Overview......................................................................................... 17

Detailed Procedures......................................................................................... 23

Getting to the HVAC Setup Screens..............................................................................23

Logging In .....................................................................................................................24

Naming Zones...............................................................................................................25

Defining the Number of Stages in a Zone ......................................................................26

Setting the Heating Setpoints ........................................................................................27

Setting the Cooling Setpoints ........................................................................................28

Setting the Heating and Cooling Lockouts .....................................................................29

Setting the Dehumidification Parameters.......................................................................30

Setting the Dehumidification Lockouts...........................................................................32

Setting the Fan Parameters...........................................................................................33

Setting the Night Setback Parameters...........................................................................35

Setting the Logging Interval for a Zone..........................................................................38

Overriding HVAC Zone Settings........................................................39

Introduction....................................................................................................... 39

Key Concepts.................................................................................................... 40

Fixed Override...............................................................................................................40

Timed Override..............................................................................................................40



Logging In .....................................................................................................................42

Overriding HVAC Outputs .............................................................................................43

Programming HVAC System Parameters 3

Defining HVAC Inputs and Outputs ..................................................45

Introduction....................................................................................................... 45

Key Concepts.................................................................................................... 46

HVAC Inputs .................................................................................................................46

HVAC Outputs...............................................................................................................46

Board and Point Locations.............................................................................................46

Internal Inputs and Outputs ...........................................................................................46

External Input Boards ....................................................................................................47

External Output Boards .................................................................................................47



Defining HVAC Inputs and Outputs ...............................................................................49

HVAC Parameters4


Viewing HVAC SystemInformation

IntroductionThe status of the following HVAC parameters may be viewed:

• Zone temperature

• Zone humidity

• Outside temperature

• Zone heating and cooling output status

• Runtimes for each heating and cooling stage

• Zone temperature logs

HVAC alarms are viewed and acknowledged at the SystemsParameters screens. See the Programming ACT2 System ParametersTechnical Bulletin (LIT-804400) for more information.

HVAC Parameters6

Key Concepts

HVAC Control

The ACT2 controller can control up to five zones of HVAC, with up tosix stages of cooling, four stages of normal heat, two stages ofauxiliary heat, and two fan speeds for each stage.

HVAC Input Status Screen

The HVAC status screens are identified by the word “Status” in theupper right corner of the screen. The upper left corner identifies theHVAC zone for which the status is displayed.

The input status screen displays the temperature and humidity sensorreadings that are controlling that zone, as well as the outdoor air sensortemperature if used.

See the example below:

1.Zone1 Status

Temp 67 Hum 55

Out 32

MENU NEXT MORE SETUP

Indicates that this is a status screen.

This status information applies to the zone indicated here.

Zone Temperature

Zone Humidity

Outside Temperature

Figure 1: HVAC Input Status Screen

The screen above is an input status screen for Zone 1 of the HVACsystem. In the figure above:

• The temperature is 67°F.

• The humidity level is 55%.

• The outside temperature is 32°F.


HVAC Output Status Screen

The HVAC status screens are identified by the word “Status” in theupper right corner of the screen. The upper left corner identifies theHVAC zone for which the status is displayed.

The output status screen displays the number of heating, cooling, andfan stages that are programmed, and the status of each output. Eachletter stands for 1 stage that the ACT2 controller is controlling.

• A backlit letter indicates that the output for that stage is activated.

• A flashing letter indicates that the output is being overridden.

See the example below:

1.Zone1 Status

-COOLS- -HEAT- FANS

CCC___ §§H_AA £F


Cooling Outputs Heating Outputs Fan Outputs

Figure 2: HVAC Output Status Screen

The screen above is an output status screen for Zone 1 of the HVACsystem. In Figure 2:

• Zone 1 has three cooling stages (out of six possible);

• three heat and two auxiliary heat stages (out of four heat andtwo auxiliary heat possible);

• and two fan speeds (out of two possible).

There are no cooling stages being called for in Zone 1; however,two heat stages and the first fan speed are being called for.

HVAC Parameters8

Procedure Overview

Table 1: Viewing HVAC System Information

To Do This Follow These Steps:View the Status of a HVACZone

See the Key Concepts sectionHVAC Input Status Screen formore information about the InputStatus screen.

1. From the Main menu, press the HVACbutton.

2. Press the NEXT button until the desiredHVAC zone is shown in the upper leftcorner of the screen.

View the Status of Heating andCooling Stages for Each Zone

See the Key Concepts sectionHVAC Output Status Screen formore information about theOutput Status screen.

1. Select the desired HVAC zone as in theinstructions above.

2. Press the MORE button to view the statusof the cooling, heating, and fan outputs forthat zone.

3. View the screen to determine the status ofthis zone's cooling, heating, and fanoutputs.

View Runtimes for Each Stage 1. Select the desired HVAC zone as in theinstructions above.

2. Press the SETUP button.

3. Press the SELECT button.

4. Press the NEXT button until theRUNTIME parameter is underlined.

5. Press the PICK button.

6. Use the PREV and NEXT buttons to scrollthrough the list.Use the CLR button to reset all runtimesto zero.

View HVAC Zone Logs 1. Select the desired HVAC zone as in theinstructions above.



4. Press the NEXT button until the LOGSparameter is underlined.


6. Use the PREV and NEXT buttons to viewthe logged values.Use the MORE button to change to theZONE HUM (zone humidity) and OUTSTEMP (outside temperature) logs.


Detailed Procedures

Viewing the Status of an HVAC Zone

1. From the Main menu, pressthe HVAC button.

2. Press the NEXT button untilthe desired HVAC zone isshown in the upper leftcorner of the screen.

Result: Temp = temperature (°F) for that zoneHum = humidity (%) for that zoneOut = outside air temperature (°F).

Note: See the Key Concepts section HVAC Input Status Screen formore information about the input status screen.

Viewing the Status of Heating and Cooling Stages for Each Zone

1. Select the desired HVACzone as in the instructionsabove.

2. Press the MORE button toview the status of thecooling, heating, and fanoutputs for that zone.

3. View the screen to determinethe status of this zone’scooling, heating, and fanoutputs.

Black lettering indicates that theoutput is OFF.

Reverse lettering indicates thatthe output is ON.

Blinking lettering indicates thatthe output is overridden.

1.Zone1 Status

-COOLS- -HEAT- FANS

CCC___ §§H_AA £F


Cooling Outputs Heating Outputs Fan Outputs

In this example, there are: 3 cooling outputs out of 6 possible, 3 heating outputs used, out of 4 possible, 2 auxiliary heat outputs used, out of 2 possible and 2 fan speeds used, out of 2 possible.2 stages of heat and 1 fan speed are being called for.

Note: See the Key Concepts section HVAC Output Status Screenfor more information about the output status screen.

HVAC Parameters10

Viewing Runtimes for Each Stage




4. Press the NEXT button untilthe RUNTIME parameter isunderlined.


6. A list with runtimes for eachstage of heating, cooling, andfan speed in that zone isshown.

Use the PREV and NEXTbuttons to scroll through thelist.

Use the CLR button to resetall runtimes to zero.


Viewing HVAC Zone Logs




4. Press the NEXT button untilthe LOGS parameter isunderlined.


6. The zone temperature logsare displayed.

Press the PREV and NEXTbuttons to view the loggedvalues.

Press the MORE button tochange to the ZONE HUM(zone humidity) and OUTSTEMP (outside temperature)logs.

HVAC Parameters12


Setting Up HVAC ZoneInformation

IntroductionHVAC zone information includes the following parameters:

• Zone name

• Number of cooling, heating, and auxiliary heat stages, and numberof fan speeds in that zone

• Heat and auxiliary heat setpoints, differentials, and time delays

• Cooling setpoint, differential, and time delay

• Auxiliary heat and cooling lockouts based on outside temperature

• Dehumidification parameters

• Fan speed used during heat, auxiliary heat, and cooling.

• Night setback parameters

• Logging interval for HVAC parameters

HVAC Parameters14

Key Concepts

Passwords

The default password for the ACT2 controller is “ABC.” To changethis password, see the Changing the Password section in theProgramming ACT2 System Parameters Technical Bulletin.

To disable the password, change it to “000.”

HVAC Zone Name Setup

An HVAC zone name can be up to eight characters in length.Numbers, letters, symbols, and spaces may be used.

Heating and Cooling Differentials

The differential set in the ACT2 controller is the total differentialbetween stages—the inter-stage differential is the total differentialdivided by the number of stages.

75

76

77

78

79

80

81

82

83

Setpoint

InterstageDifferential(= 2°)

Stage differentialfixed at 1°

ON

ON

ON

ON

OFF

OFF

OFF

OFF

Stage 1

Stage 2

Stage 3

Stage 4

Figure 3: Sample Cooling Stage Operation

In the sample above, the cooling setpoint (COOL) is set at 76°, thereare four stages of cooling available, and the differential (DFF) is setat 8°. This yields an inter-stage differential of 2° (= 8°/4).

IMPORTANT: The stage differential is always fixed at 1°F.

When only one stage of heating or cooling is used, thedifferential (DFF) is ignored.


Heating and Cooling Time Delays

The heating and cooling time delays set the minimum time betweensuccessive heating or cooling stages. Time delays are set in minutes.

Lockouts

The auxiliary heating and cooling lockouts are used to preventauxiliary heat or cool when the outside temperature is above or belowthe given temperature. The lockout feature is used to save energy.For example, if auxiliary heat is used as a freeze protection, it may bedisabled when there is no danger of freezing; e.g., if the outsidetemperature is above 45°F.

Dehumidification Sensor Type

The following two sensor types may be used for humidity sensing:

Sensor: This sensor type should be selected when humidityinformation is received from Part Number 700-0800 Humidity Sensor.

Stat: This sensor type should be selected when a digital humidistat isused to trigger dehumidification.

Dehumidification Deadband

The deadband for dehumidification is the humidity differential. Forexample, if the dehumidification setpoint is 50% humidity, and thedeadband is 5%, dehumidification will begin when the humidity risesto 55% humidity and end when the humidity drops to 50%.

Fan Operation

The HVAC fans can be set to run in either of the following two ways:

• Auto: The fan will run only in conjunction with any stage ofHVAC.

• Always: The fan will run continuously.

HVAC Parameters16

Night Setback

Night setback is typically used to save energy during times when thespace is unoccupied (usually at night). By defining the setpoints duringunoccupied times (setback), it allows for higher unoccupied setpointsduring the cooling season and lower unoccupied setpoints during theheating season. During the heating season, if it is very cold outside, theindoor temperature may take longer to stabilize at the daytimetemperature. The warmup setup allows the daytime heating setpointsto become active earlier than the end of the setback time, based onoutdoor temperatures.

Night setback times must be set in 24-hour (military) time.For example, 6:00 p.m. is entered as 18:00.

T - 60 T - 50 T - 40 T -30 T - 20 T - 10 T

0

10

15

20

30

23

Tem

per

atu

re

Time (T = Night Setback End Time)

1.WARMUP STRATEGY

T. Outs: 15 30

Start (min): 60 30

SAVE INC DEC NEXT

In the screen above, when the outside temperature is less than 15°F,warmup begins 60 minutes before the end of the night setback. If the outside temperature is 30°F, warmup begins 30 minutes before theend of the night setback.

As this graph illustrates, if the outside temperature were between 15 and30°F, warmup would begin earlier than 30 minutes, but less than 60 minutes before the end of the night setback. For example, if it was 23°F outside,warmup would begin 45 minutes before the end of night setback.

Figure 4: Night Setback Example

HVAC Zone Logs

Zone temperature, humidity, and outdoor air temperature values arelogged at the interval specified for that zone. The ACT2 controller canlog each value 500 times. When 500 logs have been stored, the oldestlog will be dropped as the next new log is recorded.


Procedure Overview

Table 2: Setting Up HVAC Zone Information

To Do This Follow These Steps:Get to the HVAC SetupScreens





5. Press the NEXT button until the SETUPparameter is underlined.


Log In

See the Key Concepts sectionPasswords for more informationabout logging in.

1. At the Log In screen, use the INC andDEC buttons to scroll through thenumbers and alphabet to reach the firstcharacter of the password.

2. Press the NEXT button.

3. Use the INC and DEC buttons to selectthe next character in the password.

4. Repeat Steps 2 and 3, as needed, untilthe entire password is shown on thescreen.

5. Press the SAVE button.

Name Zones

See the Key Concepts sectionHVAC Zone Name Setup formore information on namingzones.

1. Get to the HVAC Setup screen.

2. Press the EDIT button.

3. If the Log In screen is shown, enter yourpassword and press the EDIT buttonagain.

4. Press the INC and DEC buttons to selectthe first letter of the zone name that youdesire.

5. Press the NEXT button until the next letteryou wish to edit is flashing.

6. Repeat Steps 4 and 5, as needed, untilthe zone name appears as you desire.

7. Press the SAVE button to save thesechanges.

Continued on next page . . .

HVAC Parameters18

To Do This (Cont.) Follow These Steps:Define the Number of Stagesin a Zone




4. Press the NEXT button until the number ofcooling stages is flashing.

5. Press the INC and DEC buttons until thedesired number of stages is displayed.

6. Repeat Steps 4 and 5 to modify thenumber of heating stages (RECL),auxiliary heat stages (AUX), and thenumber of fan speeds (FAN).


Set the Heating Setpoints

See the Key Concepts sectionsHeating and Cooling Differentialsand Heating and Cooling TimeDelays for more information onsetting up heating parameters.


2. Press the NEXT button until the HeatingSetpoints screen is shown.



5. Press the INC and DEC buttons until thedesired heating setpoint is displayed.


7. Repeat Steps 5 and 6 to modify theheating differential (DFF) and time delay(DLY), and the auxiliary heat setpoint(AUX), differential (DFF), and time delay(DLY).


Set the Cooling Setpoints

See the Key Concepts sectionsHeating and Cooling Differentialsand Heating and Cooling TimeDelays for more information onsetting up cooling parameters.


2. Press the NEXT button until the CoolingSetpoints screen is shown.



5. Press the INC and DEC buttons until thedesired cooling setpoint is displayed.


7. Repeat Steps 5 and 6 to modify thecooling differential (DFF) and time delay(DLY).




To Do This (Cont.) Follow These Steps:Set the Heating and CoolingLockouts

See the Key Concepts sectionLockouts for more information onheating and cooling lockouts.


2. Press the NEXT button until the Lockoutsscreen is shown.



5. Press the INC and DEC buttons until thedesired outside temperature (below whichcooling is locked out) is displayed.


7. Repeat Step 5 to modify the auxiliary heatlockout.


Set the DehumidificationParameters

See the Key Concepts sectionsDehumidification Sensor Typeand Dehumidification Deadbandfor more information on settingup dehumidification parameters.


2. Press the NEXT button until the firstDehumidification screen is shown.



5. Press the INC and DEC buttons until thedesired number of cooling stages to beused during dehumidification is displayed.

6. Press the NEXT button to scroll to theinput type parameter.

7. Press the INC and DEC buttons to selectthe dehumidification input type (SENSORor STAT).


9. Press the NEXT button to show thesecond Dehumidification screen.



12. Press the INC and DEC buttons until thedesired dehumidification setpoint isdisplayed.

13. Press the NEXT button to scroll to thenext parameter.

14. Repeat Steps 12 and 13 to modify thedehumidification time delay (DLY) and toturn the low ambient temperature lockoutfeature on (Y) or off (N).



HVAC Parameters20

To Do This (Cont.) Follow These Steps:Set the DehumidificationLockouts


2. Press the NEXT button until theDehumidification Lockouts screen isshown.



5. Press the INC and DEC buttons until thedesired minimum store temperature isdisplayed.

6. Press the NEXT button to scroll to theallow reclaim heat parameter.

7. Press the INC and DEC buttons to selectyes (Y) or no (N) to allow reclaim heatduring dehumidification.


Set the Fan Parameters

See the Key Concepts sectionFan Operation for moreinformation on setting fanparameters.


2. Press the NEXT button until the FanSetup screen is shown.



5. Press the INC and DEC buttons until thedesired fan operation is displayed (AUTOor ALWAYS).


If a second fan speed is available, follow thesteps below to complete fan parameter setup.

7. Press the NEXT button until the Fan 2ndSpeed screen is shown.



10. Use the INC and DEC buttons to edit heat(RECL) during which the second fanspeed is used.


12. Repeat Steps 10 and 11 to modify thestage of auxiliary heat (ON AUX) andcooling (ON COOL) during which thesecond fan speed is used.




To Do This (Cont.) Follow These Steps:Set the Night SetbackParameters

See the Key Concepts sectionNight Setback for moreinformation on setting nightsetback and warmupparameters.


2. Press the NEXT button until the NightSetback screen is shown.



5. Press the INC and DEC buttons until thedesired night setback start time isdisplayed.


7. Repeat Steps 5 and 6 to modify the nightsetback end time and the status ofauxiliary heat (AUX) and dehumidification(DEH) during night setback.


9. Press the NEXT button until the NSB HeatSetup screen is shown.



12. Press the INC and DEC buttons until thedesired night setback heating setpoint(RCL) is displayed.


14. Repeat Steps 12 and 13 to modify thedifferential (DFF) and time delay; and theauxiliary heat setpoint (AUX), differential(DFF) and time delay (DLY) during nightsetback.


16. Press the NEXT button until theNSB Cool/Dehum screen is shown.



19. Press the INC and DEC buttons until thedesired cooling setpoint (COOL) isdisplayed.


21. Repeat Steps 19 and 20 to modify thedifferential (DFF) and time delay (DLY);and the dehumidification setpoint (DEH),differential (DFF) and time delay (DLY)during night setback.


23. Press the NEXT button until the WarmupStrategy screen is shown.


HVAC Parameters22

To Do This (Cont.) Follow These Steps:24. Press the EDIT button.


26. Press the INC and DEC buttons until thedesired first outside temperature setpoint(T. Outs) is displayed.


28. Repeat Steps 26 and 27 to modify the firststart time (Start) and the secondtemperature setpoint and start time for thewarmup strategy.


Set the Logging Interval for aZone

See the Key Concepts sectionHVAC Zone Logs for moreinformation on setting nightsetback and warmupparameters.


2. Press the NEXT button until the LogInterval screen is shown.



5. Press the INC and DEC buttons until thedesired log interval is shown.

6. Press the SAVE button to save thesechanges and return to the HVAC Setupscreen.


Detailed Procedures

Getting to the HVAC Setup Screens





5. Press the NEXT button untilthe SETUP parameter isunderlined.


HVAC Parameters24

Logging In

1. At the Log In screen, use theINC and DEC buttons toscroll through the numbersand alphabet to reach thefirst character of thepassword.


3. Use the INC and DECbuttons to select the nextcharacter in the password.

4. Repeat Steps 2 and 3, as needed, until the entire password is shownon the screen.


Note: See the Key Concepts section Passwords for moreinformation about logging in.


Naming Zones



3. If the Log In screen is shown, enter your password and press theEDIT button again.

4. Press the INC and DECbuttons to select the firstletter of the zone name thatyou desire.

5. Press the NEXT button untilthe next letter you wish toedit is flashing.

6. Repeat Steps 4 and 5, as needed, until the zone name appears as youdesire.

7. Press the SAVE button tosave these changes.

Note: See the Key Concepts section HVAC Zone Name Setup formore information on naming zones.

HVAC Parameters26

Defining the Number of Stages in a Zone




4. Press the NEXT button untilthe number of cooling stagesis flashing.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

SAVE INC DEC NEXT

5. Press the INC and DECbuttons until the desirednumber of stages isdisplayed.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

SAVE INC DEC NEXT

6. Repeat Steps 4 and 5 to modify the number of heating stages(RECL), auxiliary heat stages (AUX), and the number of fan speeds(FAN).


1.Zone1 MENU

COOL-2 RECL-3 AUX-1

FAN-2

SAVE INC DEC NEXT


Setting the Heating Setpoints


2. Press the NEXT button untilthe Heating Setpoints screenis shown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU

3. Press the EDIT button.1. HEATING SETPOINTS

RCL 72 DFF 2 DLY 5

AUX 70 DFF 2 DLY 10

PREV NEXT EDIT MENU


5. Press the INC and DECbuttons until the desiredheating setpoint is displayed.

1. HEATING SETPOINTS

RCL 72 DFF 2 DLY 5

AUX 70 DFF 2 DLY 10

SAVE INC DEC NEXT

6. Press the NEXT button.1. HEATING SETPOINTS

RCL 72 DFF 2 DLY 5

AUX 70 DFF 2 DLY 10

SAVE INC DEC NEXT

7. Repeat Steps 5 and 6 to modify the heating differential (DFF) andtime delay (DLY), and the auxiliary heat setpoint (AUX),differential (DFF), and time delay (DLY).


1. HEATING SETPOINTS

RCL 72 DFF 2 DLY 5

AUX 70 DFF 2 DLY 10

SAVE INC DEC NEXT

Note: See the Key Concepts sections Heating and CoolingDifferentials and Heating and Cooling Time Delays for moreinformation on setting up heating parameters.

HVAC Parameters28

Setting the Cooling Setpoints


2. Press the NEXT button untilthe Cooling Setpoints screenis shown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU

3. Press the EDIT button. 1 COOLING SETPOINTS

COOL 76 DFF 2 DLY 10

PREV NEXT EDIT MENU


5. Press the INC and DECbuttons until the desiredcooling setpoint is displayed.

1 COOLING SETPOINTS


SAVE INC DEC NEXT

6. Press the NEXT button. 1 COOLING SETPOINTS


SAVE INC DEC NEXT

7. Repeat Steps 5 and 6 to modify the cooling differential (DFF) andtime delay (DLY).


1 COOLING SETPOINTS


SAVE INC DEC NEXT

Note: See the Key Concepts sections Heating and CoolingDifferentials and Heating and Cooling Time Delays for moreinformation on setting up cooling parameters.


Setting the Heating and Cooling Lockouts

1. Get to the HVAC Setup SCREEN.

2. Press the NEXT button untilthe Lockouts screen isshown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU

3. Press the EDIT button.1. LOCKOUTS

COOL IF OUTS < 0

AUX IF OUTS > 90

PREV NEXT EDIT MENU


5. Press the INC and DECbuttons until the desiredoutside temperature (belowwhich cooling is locked out)is displayed.

1. LOCKOUTS

COOL IF OUTS < 0

AUX IF OUTS > 90

SAVE INC DEC NEXT

6. Press the NEXT button.1. LOCKOUTS

COOL IF OUTS < 0

AUX IF OUTS > 90

SAVE INC DEC NEXT

7. Repeat Step 5 to modify the auxiliary heat lockout.


1. LOCKOUTS

COOL IF OUTS < 0

AUX IF OUTS > 90

SAVE INC DEC NEXT

Note: See the Key Concepts section Lockouts for more informationon heating and cooling lockouts.

HVAC Parameters30

Setting the Dehumidification Parameters


2. Press the NEXT button untilthe first Dehumidificationscreen is shown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU

3. Press the EDIT button.1. DEHUMIDIFICATION

#COOLS USED 0

INPUT TYPE SENSOR

PREV NEXT EDIT MENU


5. Press the INC and DECbuttons until the desirednumber of cooling stages tobe used duringdehumidification isdisplayed.

1. DEHUMIDIFICATION

#COOLS USED 0

INPUT TYPE SENSOR

SAVE INC DEC NEXT

6. Press the NEXT button toscroll to the dehumidificationinput type.

1. DEHUMIDIFICATION

#COOLS USED 0

INPUT TYPE SENSOR

SAVE INC DEC NEXT

7. Press the INC and DECbuttons to select thedehumidification input type(SENSOR or STAT).

1. DEHUMIDIFICATION

#COOLS USED 0

INPUT TYPE SENSOR

SAVE INC DEC NEXT


1. DEHUMIDIFICATION

#COOLS USED 0

INPUT TYPE SENSOR

SAVE INC DEC NEXT

9. Press the NEXT button toshow the secondDehumidification screen.




12. Press the INC and DECbuttons until the desireddehumidification setpoint isdisplayed.

13. Press the NEXT button toscroll to the next parameter.

14. Repeat Steps 12 and 13 tomodify the dehumidificationtime delay (DLY) and to turnthe low ambient temperaturelockout feature on (Y) or off(N).


Note: See the Key Concepts sections Dehumidification Sensor Typeand Dehumidification Deadband for more information onsetting up dehumidification parameters.

HVAC Parameters32

Setting the Dehumidification Lockouts


2. Press the NEXT button untilthe DehumidificationLockouts screen is shown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU

3. Press the EDIT button.1. DEHUM LOCKOUTS

MINIMUM STORE TMP 70

ALLOW RECL HEAT YES

PREV NEXT EDIT MENU


5. Press the INC and DECbuttons until the desiredminimum store temperatureis displayed.

1. DEHUM LOCKOUTS


ALLOW RECL HEAT YES

SAVE INC DEC NEXT

6. Press the NEXT button toscroll to the allow reclaimheat parameter.

1. DEHUM LOCKOUTS


ALLOW RECL HEAT YES

SAVE INC DEC NEXT

7. Press the INC and DECbuttons to select yes (Y) orno (N) to allow reclaim heatduring dehumidification.

1. DEHUM LOCKOUTS


ALLOW RECL HEAT YES

SAVE INC DEC NEXT


1. DEHUM LOCKOUTS


ALLOW RECL HEAT YES

SAVE INC DEC NEXT


Setting the Fan Parameters


2. Press the NEXT button untilthe Fan Setup screen isshown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU

3. Press the EDIT button.1. FAN SETUP

RUN AUTO

PREV NEXT EDIT MENU


5. Press the INC and DECbuttons until the desired fanoperation is displayed(AUTO or ALWAYS).

1. FAN SETUP

RUN AUTO

SAVE INC DEC NEXT


1. FAN SETUP

RUN AUTO

SAVE INC DEC NEXT

If a second fan speed is available, follow the steps below to completefan parameter setup.

7. Press the NEXT button untilthe Fan 2nd Speed screen isshown.



10. Use the INC and DECbuttons to edit the stage ofheat (RECL) during whichthe second fan speed is used.

HVAC Parameters34


12. Repeat Steps 10 and 11 tomodify the stage of auxiliaryheat (ON AUX) and cooling(ON COOL) during whichthe second fan speed is used.


Note: See the Key Concepts section Fan Operation for moreinformation on setting fan parameters.


Setting the Night Setback Parameters


2. Press the NEXT button untilthe Night Setback screen isshown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU



5. Press the INC and DECbuttons until the desirednight setback start time isdisplayed.


7. Repeat Steps 5 and 6 to modify the night setback end time and thestatus of auxiliary heat (AUX) and dehumidification (DEH) duringnight setback.


9. Press the NEXT button untilthe NSB Heat Setup screen isshown.



HVAC Parameters36

12. Press the INC and DECbuttons until the desirednight setback heatingsetpoint (RCL) is displayed.


14. Repeat Steps 12 and 13 tomodify the differential (DFF)and time delay; and theauxiliary heat setpoint(AUX), differential (DFF)and time delay (DLY) duringnight setback.


16. Press the NEXT button untilthe NSB Cool/Dehum screenis shown.



19. Press the INC and DECbuttons until the desiredcooling setpoint (COOL) isdisplayed.



21. Repeat Steps 19 and 20 tomodify the differential (DFF)and time delay (DLY); andthe dehumidification setpoint(DEH), differential (DFF)and time delay (DLY) duringnight setback.


23. Press the NEXT button untilthe Warmup Strategy screenis shown.



26. Press the INC and DECbuttons until the desired firstoutside temperature setpoint(T. Outs) is displayed.


28. Repeat Steps 26 and 27 tomodify the first start time(Start) and the secondtemperature setpoint andstart time for the warmupstrategy.


1.WARMUP STRATEGY

T. Outs: 0 0

Start (min): Non Non

SAVE INC DEC NEXT

Note: See the Key Concepts section Night Setback for moreinformation on setting night setback and warmup parameters.

HVAC Parameters38

Setting the Logging Interval for a Zone


2. Press the NEXT button untilthe Log Interval screen isshown.

1.Zone1 MENU

COOL-0 RECL-0 AUX-0

FAN-0

PREV NEXT EDIT MENU



5. Press the INC and DECbuttons until the desired loginterval is shown.

6. Press the SAVE button tosave these changes andreturn to the HVAC Setupscreen.

Note: See the Key Concepts section HVAC Zone Logs for moreinformation on setting night setback and warmup parameters.


Overriding HVAC Zone Settings

IntroductionThis section describes how to override the following HVAC outputs:

• Cooling Outputs

• Heating Outputs

• Auxiliary Heat Outputs

• Fan Speed Outputs

Outputs can be overridden in the following ways:

• Fixed ON

• Fixed OFF

• Timed ON

• Timed OFF

Outputs that are not overridden display a status of NORMAL.

HVAC Parameters40

Key Concepts

Fixed Override

When an output status is changed to fixed override, the status of theoutput remains at the override setting until the override is manuallyremoved.

Timed Override

When an output status is changed to timed override, the status of theoutput remains at the override setting until the override time hasexpired.


Procedure Overview

Table 3: Overriding HVAC Zone Settings

To Do This Follow These Steps:Log In

See the Key Concepts sectionPasswords for more informationabout logging in.

1. At the Log In screen, use the INC andDEC buttons to scroll through thenumbers and alphabet to reach the firstcharacter of the password.


3. Use the INC and DEC buttons to selectthe next character in the password.

4. Repeat Steps 2 and 3 until the entirepassword is shown on the screen.


Override HVAC Outputs• Cooling Outputs• Reclaim Heat Outputs• Auxiliary Heat Outputs• Fan Outputs

See the Key Concepts FixedOverride and Timed Overridesections for more information onoverride settings.





5. Press the NEXT button until theOVERRIDES parameter is underlined.


7. Use the PREV and NEXT buttons tochoose the output you wish to override.



10. Use the INC and DEC buttons to overridethe output ON FIXED, OFF FIXED, ONTIMED, or OFF TIMED; or selectNORMAL to return to normal controloperation.

11. If ON TIMED or OFF TIMED override isselected:

a. Press the NEXT button to set theoverride time.

b. Use the INC and DEC buttons to setthe override time.

12. Press the SAVE button to return to theOverride menu.

HVAC Parameters42

Detailed Procedures

Logging In

1. At the Log In screen, use theINC and DEC buttons toscroll through the numbersand alphabet to reach thefirst character of thepassword.


3. Use the INC and DECbuttons to select the nextcharacter in the password.

4. Repeat Steps 2 and 3 until the entire password is shown on thescreen.


Note: See the Key Concepts section Passwords for moreinformation about logging in.


Overriding HVAC Outputs





5. Press the NEXT button untilthe OVERRIDES parameteris underlined.


7. Use the PREV and NEXTbuttons to choose the outputyou wish to override.



HVAC Parameters44

10. Use the INC and DECbuttons to override the outputON FIXED, OFF FIXED,ON TIMED, or OFFTIMED; or select NORMALto return to control operation.

11. If ON TIMED or OFFTIMED override is selected:

a. Press the NEXT buttonto set the override time.

b. Use the INC and DECbuttons to set theoverride time.

12. Press the SAVE button toreturn to the override menu.

Note: See the Key Concepts sections Fixed Override and TimedOverride for more information on override settings.


Defining HVAC Inputs andOutputs

IntroductionThis section covers assigning board and point locations to the HVACinputs and outputs listed below, as well as defining the relay action(N.O. or N.C.) for these outputs.

HVAC inputs and outputs include the following:

• Zone Temperature Sensor Input

• Zone Humidity Sensor Input

• Fan Proof Sensor Input and Type

• Outside Temperature Sensor Input

• Cooling Stage 1-6 Outputs

• Reclaim Heat Stage 1-4 Outputs

• Auxiliary Heat Stage 1 and 2 Outputs

• Fan Speed 1 and 2 Outputs

HVAC Parameters46

Key Concepts

HVAC Inputs

The HVAC inputs include the following sensors:

• Zone Temperature Sensor Input (one for each zone)

• Zone Humidity Sensor Input (one for each zone)

• Fan Proof Sensor Input and Type

• Outside Temperature Sensor Input

HVAC Outputs

HVAC outputs include the following:

• Cooling outputs (up to six stages)

• Heating outputs (up to four reclaim heat and two auxiliary heatstages)

• Two fan speed outputs

Board and Point Locations

Inte

rna

l Inp

uts

F 1 0

MicroController

Unit(MCU)

Transformer

Re

lay

1

Re

lay

2

Re

lay

3

Re

lay

4

Re

lay

5

Re

lay

6

Re

lay

7

Re

lay

8

Re

lay

9

Re

lay

10

Power

+-

-+

Internal Outputs

Figure 5: Internal Inputs and Outputs

Internal Inputs and Outputs

The ACT2 controller contains 16 input points, 9 general purposeoutput relays, and 1 alarm output relay on the internal circuit board.Additional input and output boards may be connected to increase thenumber of inputs and outputs that the controller can control. Whendefining the location of an input or output, the ACT2 controllerdesignates the internal input and output board locations as “IN.”


Figure 6: External Input Board

External Input Boards

Each input board provides 16 additional input points. Up to 20 inputboards may be used with one ACT2 controller.

External input boards must be assigned a board number before theycan be specified as an input location. For more information on how toassign a number to an input board, see the document titledProgramming ACT2 System Parameters Technical Bulletin(LIT-804400).

External Output Boards

Figure 7: External Output Boards

Each output board provides eight additional output points. Up to32 output boards may be used with one ACT2 controller.

External output boards must be assigned a board number before theycan be specified as an output location. For more information on how toassign a number to an output board, see the document titledProgramming ACT2 System Parameters Technical Bulletin.

HVAC Parameters48

Procedure Overview

Table 4: Defining HVAC Inputs and Outputs

To Do This Follow These Steps:Define HVAC inputs andoutputs

Board and point locations aredefined for the following inputs:

temperature sensorshumidity sensorsfan proof sensor

Board and point locations andrelay action are defined for thefollowing outputs:

cooling stagesauxiliary heat stagesfan speed

See the Key Concepts sectionsHVAC Inputs, HVAC Outputs,and Board and Point Locationsfor more information on defininginputs and outputs.





5. Press the NEXT button until I/O flashes.


7. Use the PREV and NEXT buttons to scrollthrough the list and display the input oroutput that you wish to define.



10. Use the INC and DEC buttons to modifythe flashing value.


12. Repeat Steps 10 and 11 until the input oroutput location and relay action are set asdesired.

13. Press the SAVE button to return to the listof HVAC inputs and outputs.


Detailed Procedures

Defining HVAC Inputs and Outputs





5. Press the NEXT button untilthe I/O parameter isunderlined.


7. Use the PREV and NEXTbuttons to scroll through thelist and display the input oroutput that you wish todefine.



HVAC Parameters50

10. Use the INC and DECbuttons to modify theflashing value.


12. Repeat Steps 10 and 11 until the input or output location and relayaction are set as desired.

13. Press the SAVE button toreturn to the list of HVACinputs and outputs.

Note: See the Key Concepts sections HVAC Inputs, HVAC Outputs,and Board and Point Locations for more information ondefining inputs and outputs.


Notes

HVAC Parameters52

Notes

Controls Group www.johnsoncontrols.com507 E. Michigan Street FAN 804P.O. Box 423 Refrigeration Systems Technical ManualMilwaukee, WI 53201 Printed in U.S.A.

Documents

Programming HVAC System Parameters Technical Bulletin