Lennox International Inc G71MPP03 Humidification and Dehumidification Modes, HUMIDIFICATION modes

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Humidification and Dehumidification Modes
HEAT Setpoint+COOL Setpoint
2

Humidification and Dehumidification Modes

HUMIDIFICATION modes

BASIC & PRECISION

and 45%. These conditions must be met for either mode to operate:

Shumidification mode has been enabled, and

Sthe unit is in HEAT mode, and

Shumidification demand exists (24V present at H), and

SBASIC mode also requires presence of heating demand [Y for HP heat, or W for gas heat (W may be energized with G de−energized)].

DEW POINT(Available only if Wi−Fi is operational or outdoor sensor is at- tached)

Basic Dew Point Control

change the humidification setpoint based on the outdoor temperature and a user−defined dew point adjustment setting.

Precision Dew Point Control

mode will operate when these conditions are met:

Shumidification mode has been enabled, and

Sthe unit is in HEAT mode, and

Shumidification demand exists (24V present at H).

DEHUMIDIFICATION modes

NOTE − Basic and Precision dehumidification modes are functions of the HVAC system with NO external dehumidification devices installed. Humidi- trol and Auxiliary Dehumidifiers do not use these modes.

In BASIC mode, dehumidification occurs if these conditions are met and sig- nals are present at specific terminals:

Sdehumidification has been enabled on installer settings, and

Sthe unit is in COOL mode, and

Sdehumidification demand exists (RH above setpoint), and

Scooling demand exists (Y1 energized).

In PRECISION mode, dehumidification occurs if all BASIC conditions are true, except cooling demand may or may not be present. Also note that:

SMaximum overcool from cooling setpoint is 2ºF.

SDeadband temperature is limited to a minimum of 5ºF (instead of 3ºF in BASIC or DISPLAY ONLY mode) because of 2ºF overcooling.

Humiditrol® or Auxiliary Dehumidifier mode requires:

NOTE − Systems using icomfort tand a dehumidifier −

furnace/air handler control does not need to be cut when using with a icom- fort Wi-Fi tthermostat.

SWi−Fi is operational or outdoor sensor is installed and set up

Sdehumidification has been enabled on installer settings, and

Sthe unit is in COOL mode, (or if in AUTO, at least one thermostat cool- ing call made prior to the dehumidification demand), and

Sa dehumidification demand exists (RH above setpoint), and

Soutdoor temp. below 95°F; indoor temp. above 65°F, and

Sfor HUMIDITROL, adjust Humiditrol® comfort parameters as follows:

MAX adj. − Indoor temp > 2°F above heating setpoint

MID adj. − Indoor temp >

MIN adj. − Indoor temp > 2°F below cooling setpoint Auxiliary Dehumidifier (stand alone dehumidifier)

When this option is selected, dehumidification will be allowed under the fol- lowing conditions, provided there is NO call for humidification:

SIn the absence of heating or cooling calls, or

SSimultaneous with blower only calls.

If the blower is required to operate while the auxiliary dehumidifier is running, a separate wire must be installed from the auxiliary dehumidifier to the indoor unit’s G thermostat input that will energize G when the auxiliary dehumidifier is running (see wiring diagram on Page 61).

Auxiliary dehumidification is controlled by the thermostat dehumidification demand.

NOTE − Refer to HCWH Dehumidifier Installation Instructions for installation recommendations.

506920−01 09/12

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Contents 2P0912**P506920-01 INSTALLER’S SYSTEM SETUP GUIDEicomfortt−Enabled Units CONTROLSSetting up typical icomfortt systems Table of ContentsPage Supports Outdoor Temperature Sensor optionFigure 1. icomfort by Lennoxt system Installation and Setup Dealer Number Change settingsFigure 3. Settings change tools Figure 4. EnteringCirculate fan ON time setting Table 1. System setting defaults and rangeFigure 5. View/edit time and date Set time and date09 39 am Figure 6. Set current time and dateFigure 7. Using the Add or Remove Non−communicating equipment HUMIDITY CONTROL TIPSred settings Add Non−Communicating Outdoor unitFigure 8. Add non−communicating device SystemSystem 5a 5bFigure 9. Add or remove non−communicating device HumidifierDehumidifier Figure 10. Add or remove non−communicating deviceSystem DehumidifierAdjust a setting screen communicating devices Figure 11. Adjust communicating device screensFigure 12. Accessing device to modify Figure 13. Modify device settingsG71MPP or SLP98 Furnace Note Figure 14. Adjust a non−communicating device setting Figure 15. Adjust a non−communicating device setting Figure 16. Adjust dehumidification when not using Humiditrol or an auxiliary dehumidifier Humidification and Dehumidification Modes HUMIDIFICATION modesDEHUMIDIFICATION modes Figure 18. Select tests to run screen Use the Tests / Diagnostics featuresFigure 17. Start testing screen Figure 19. Typical tests results screensFigure 20. Testing finished screen Equipment, Alerts, DiagnosticsSet up Equipment parameters Figure 21. Equipment parameters screenRun Diagnostics Figure 22. Edit equipment detailsFigure 23. Select device and run diagnostics View and clear Installer AlertsFigure 24. Selecting and viewing alerts Figure 25. Cleared alert confirmationView cleared alerts Figure 26. Cleared alerts screenSTART Figure 27. Wi−Fi setupSecure Connection Recommended HERERegistering the icomfort Wi-Fitthermostat Registration for online accessFigure 28. Change Networks Figure 30. icomfort Wi-FitRegistration screen Figure 31. PC Welcome Screen Welcome homeHow Do I Upload a Skin? Wi-FitTherAccess installer program from Home screen yes noReconfigure a system Figure 34. Re−configuration process2nd Stage Differential where applicable2 Smooth Setback Recovery SSR Rules for SSRLow Balance Point Heat Pump, Dual Fuel and Balance PointsHeat Pump Balance Points High Balance PointShut down HP Figure 36. Variable Capacity Operation Flow Chart Gas Heat Control ModeStaged operation Table 2. Variable Capacity Furnace OperationLoad−tracking Variable Capacity FAQs SLP98V only Table 3. Adjustable Parameters Table Installer Installer entryTable 3. Adjustable Parameters Table Installer Lock in 2nd stage HP by Outdoor TempTable 3. Adjustable Parameters Table Installer AIR HANDLERGas Heat Airflow Settings Table 3. Adjustable Parameters Table InstallerFURNACE Cooling Airflow Settings Heat Pump Airflow SettingsTable 3. Adjustable Parameters Table Installer Other Parameters Table 3. Adjustable Parameters Table InstallerTable 4. Adjustable Parameters Table User Filter 1 Timer Table 5. Alert Codes and Troubleshooting Table 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertTable 5. Alert Codes and Troubleshooting AlertHomeowner Service Alert Codes8 Table 5. Alert Codes and TroubleshootingPossible Cause Table 6. Troubleshooting TipsIssue / Problem Corrective Action / CommentsTable 6. Troubleshooting Tips High Balance Point and Low BalTable 6. Troubleshooting Tips Determine the actual Software verTable 6. Troubleshooting Tips During the cooling mode the disWiring Diagrams icomfortt Communicating System WiringWiring Diagrams icomfort by Lennoxt AIR HANDLER AHCOptional Accessories Wiring for use with any icomfort by Lennoxt systemOptional Accessories Wiring for use with any icomfort by Lennoxt systemLVCS Ventilation Control System attached to the PUSHBUTTON Setting up typical systems TIPSTIPS Setting up typical systemsT PUMP DUAL FUEL TIPSTIPS Setting up typical systems TIPSTIPS Setting up typical systemsT PUMP UNITS TIPSTIPS icomfortt−Enabled Unit Table 7. Replacement ControlsREVISION HISTORY Replacement Kit Catalog No