Lennox ComfortSense 7000 series Programming And Application Manual Download Page 18

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506230−01 05/09

Page 18

Stage Delay & Differential Settings (Installer settings)

(continued)

H/C
Stages
Locked =
YES

H/C
Stages
Locked =
NO

SET-
POINTS:

2nd stage
ON

2nd stage

OFF

1st stage
ON

1st stage

OFF

2nd stage
ON

2nd stage

OFF

1st stage
ON

1st stage

OFF

SP −1.5

SP −1.0

SP −0.5

SP +1.5

SP +1.0

SP +0.5

SP +2.0

Stg1 Differential

Stg2 Differential

Stg1 Differential

Figure 6. Cooling − 1 or 2 stages

H/C
Stages
Locked =
YES

H/C
Stages
Locked =
NO

1st stage

2nd stage

1st stage

2nd stage

2nd stage
OFF

1st stage
OFF

2nd stage
OFF

SP −1.5

SP −1.0

SP −0.5

SP +0.5

SP −2.0

Stg1 Differential

Stg2 Differential

SP −2.5

SP −3.0

Stg1 Differential

Stg2 Differential

SET-
POINTS:

Figure 7. Heating − Non−Heat Pump or Heat Pump w/o backup heat − 1 or 2 stages

H/C
Stages
Locked =
NO

H/C
Stages
Locked =
YES

SET-
POINTS:

3rd stage

1st stage

2nd stage

3rd stage

1st stage

2nd stage

2nd stage
OFF

3rd stage
OFF

1st stage
OFF

2nd stage
OFF

3rd stage
OFF

SP −1.5

SP −1.0

SP −0.5

SP +0.5

SP −2.0

Stg1 Differential

Stg3 Differential

Stg2 Differential

SP −2.5

SP −3.0

SP −3.5

Stg1 Differential

Stg3 Differential

Stg2 Differential

Figure 8. Heating − Heat Pump w/electric − 3 stage (2 compressor / 1 backup OR 1 compressor / 2

backup)

H/C
Stages
Locked =
YES

H/C
Stages
Locked =
NO

3rd stage

1st stage

2nd stage

4th stage

3rd stage

1st stage

2nd stage

4th stage

2nd stage
OFF

3rd stage
OFF

4th stage
OFF

1st stage
OFF

Stg4 Differential

1st stage
OFF

2nd stage
OFF

3rd stage
OFF

4th stage
OFF

SET-
POINTS:

SP −1.5

SP −1.0

SP −0.5

SP +0.5

SP −2.0

Stg1 Differential

Stg3 Differential

Stg2 Differential

SP −2.5

SP −3.0

SP −3.5

Stg1 Differential

Stg3 Differential

Stg2 Differential

Stg4 Differential

Figure 9. Heating − Heat Pump w/electric − 4 stage (2 compressor / 2 backup)

H/C
Stages
Locked =
NO or
YES

2nd stage

1st stage

2nd stage
OFF

1st stage
OFF

SP −1.5

SP −1.0

SP −0.5

SP +0.5

SP −2.0

Stg1 Differential

SP −2.5

SP −3.0

Stg2 Differential

SET-
POINTS:

Figure 10. Heating − dual fuel − 2 stage (1 compressor / 1 backup)

Summary of Contents for ComfortSense 7000 series

Page 1: ... Table of Contents ComfortSense Model L7742U Thermostat 2 Features 2 Touch Screen Display 3 Home Screen Current Conditions Temp Settings 3 Controlling the Heat Cool Modes of Operation 4 Controlling the Fan Operation 5 Controlling the Schedule 5 Schedule Tab Programming 6 Options Tab Reminders User Settings 8 Options Tab Installer Settings 10 Resetting Program to Factory Conditions 12 EPA ENERGY ST...

Page 2: ...ection A 5 minute compressor short cycle protection timer begins when a compressor output is de energized Also if a pow er loss occurs the system will go into compressor protec tion mode and display WAIT in the display if there is a cool ing or compressor heating call Outdoor Temperature Sensor An outdoor temperature sensor X2658 is required for dual fuel applications balance points dew point humi...

Page 3: ...vice reminder periods etc H Schedule time adjustment User Installer Settings up down arrows D HOME screen not visible except when execut ing a HOLD SETTING D SCHEDULE and OPTION screens used to ad just schedule and option settings I Dynamic keys not visible in HOME screen unless executing a HOLD SETTING For SCHEDULE and OPTIONS settings these keys appear and change depending on the selection See t...

Page 4: ... summarizes the information mes sages When the faults errors and service information displays appear dynamic keys will appear under the second line entries REMIND CLEAR SERVICE or RESET Press the box to perform the action INFORMATION DISPLAY AREA Figure 3 Home Screen Table 1 Information Display Area Faults Errors and Service Information TEMP SENSOR ERROR MEMORY ERROR CALL FOR SERVICE Top line faul...

Page 5: ... program the fan to be ON AUTO or CIRC during a program event period While scheduling the event if the fan is set to ON it will remain on during the entire event If it is set to CIRC it will circulate during equipment inactivity per user programmable cycles see FAN CIRCULATE Page 9 If set to AUTO the fan will come on with the equipment to serve the heating cooling demand and go off accordingly NOT...

Page 6: ...eekday programming and SAT TO SUN weekend programming C MONDAY through SUNDAY allows individual days of the week to be programmed separately NOTE After using one of the groups of days described above the program allows you to subsequently change individual days to suit your needs To get to the different groupings of days press EDIT then press NEXT repeatedly to scroll to the desired grouping Progr...

Page 7: ...After change is made SAVE appears in the bottom right hand of the screen 6 Press FAN repeatedly to select desired fan mode Fan indicator displays selection ON AUTO or CIRC 7 Press UP DOWN arrows to adjust start time for selected event Information area displays start time 8 Repeat steps 4 7 for all remaining events If you selected other than MON TUE WED THU FRI SAT SUN continue otherwise skip to st...

Page 8: ...mn use up down arrows to adjust press box below each small up arrow to select each column Adjust press SAVE FEB 11 2OO9 12PM 49 MON DAY YR HR MIN CANCEL SAVE F C default is Fahrenheit to change to Celsius scroll to F C press ENTER Use arrows to change to C press SAVE F OR C DEFAULT F F 12 OR 24 HOUR clock default is 12H to change scroll to 12 OR 24 HOUR press ENTER Use arrows to change to 24H pres...

Page 9: ...cool ing setpoint MIN setting down to 2ºF above the heating setpoint MAX setting Halfway between the two settings is the MID setting The default setting is MAX to change to MID or MIN scroll to HUMIDITROL ADJUST press EN TER Use arrows to scroll to MID or MIN then press SAVE HUMIDITROL ADJUST DEFAULT MAX MIN NOTE Humiditrol does not function if the outdoor tem perature is 95ºF or greater nor when ...

Page 10: ...UMP use arrows to select backup heat NO HEAT GAS OIL or ELECTRIC then press SAVE NON HEAT PUMP NO HEAT GAS OIL ELECTRIC For HEAT PUMP use arrows to select backup heat NO BACKUP HEAT DUAL FUEL GAS OIL or ELECTRIC then press SAVE HEAT PUMP NO BACKUP HEAT DUAL FUEL GAS OIL ELECTRIC For COMPRESSOR STAGES use arrows to select either 1 or 2 compressor stages then press SAVE COMPRESSOR STAGES 2 For INDOO...

Page 11: ...nly all backup heat W1 W2 enabled 20 120 min before wake up setpoint Run HP Y1 Y2 and have available backup heat W1 W2 as needed 1 stage HP with 1 stage gas oil backup Run HP Y1 only all backup heat W1 enabled 20 120 min before wake up setpoint Run HP Y1 until a 2nd stage demand is needed by time temp differential then HP operation must stop and changeover and lock in to W1 heat until setpoint rea...

Page 12: ... may be created using a text message This will appear in the list of reminders and the user can then select the time for the reminder to be displayed Scroll to CUSTOM REMINDER 1 or 2 Press ENTER To create a reminder press EDIT CUSTOM REMINDER 1 A cursor will appear on the second line Use the arrows to scroll through letters numbers and special characters When the desired character appears press NE...

Page 13: ...SOR PROTECT DEFAULT ON OFF SYSTEM TEST MODES After the thermostat has been installed and set up the installer may run a system test function accessed through the installer settings menu to test all cooling heating Emergency Heating stages and FAN outputs Scroll to SYSTEM TEST MODES and press ENTER select TEST OUTPUTS and press ENTER SYSTEM TEST MODES TEST OUTPUTS SCROLL arrows move through a list ...

Page 14: ...efined dew point adjustment setting affects op eration per the following formula RHsetpoint Outdoor Temp ºF 2 25 RHuser dew point adjustment Where RHuser dew point adjustment cannot exceed 15 and RHsetpoint minimum is 15 and cannot exceed 45 Scroll to HUMIDITY SETTINGS press ENTER HUMIDITY MODE HUMIDIFY DEHUMIDIFY Press the box below HUMIDIFY Use up down arrows to select DEWPOINT press ENTER HUM M...

Page 15: ...L mode or if in AUTO there has been at least one thermostat cooling call made prior to the dehumidification demand and S a dehumidification demand exists RH above set point and S outdoor temperature is below 95 F and S indoor temperature is above 65 F and S the room temperature meets Humiditrol adjustment parameters as follows D MAX Indoor temp 2 F above heating setpoint D MID Indoor temp HEAT SET...

Page 16: ...to the dehumidification speed and cycle Y2 ON to the outdoor unit Cooling has priority over Humiditrol calls Heating only Thermostat will cycle heating ON and OFF to maintain heating setpoint Dehumidification func tions are disabled Autochangeover Dehumidification will only occur if a dehumidification demand is present a cooling demand is not present outdoor temperature is less than 95 F indoor te...

Page 17: ...nts Scroll to STG 1 DIFF press ENTER Select the desired differential Press SAVE STG 1 DIFF DEFAULT 1 O F O 5 F STG 2 DIFF thru STG 4 DIFF where applicable The de fault is 1 0 F but can be programmed between 0 5 and 8 0 F in 0 5 F increments Scroll to STG 2 DIFF or 3 or 4 press ENTER Select the desired differential Press SAVE STG 2 DIFF DEFAULT 1 O F O 5 F 2nd thru 4th STAGE DELAY timer where appli...

Page 18: ... 3rd stage OFF 1st stage OFF 1st stage OFF 2nd stage OFF 3rd stage OFF SP 1 5 SP 1 0 SP 0 5 SP SP 0 5 SP 2 0 Stg1 Differential Stg3 Differential Stg2 Differential SP 2 5 SP 3 0 SP 3 5 Stg1 Differential Stg3 Differential Stg2 Differential Figure 8 Heating Heat Pump w electric 3 stage 2 compressor 1 backup OR 1 compressor 2 backup H C Stages Locked YES H C Stages Locked NO 3rd stage ON 1st stage ON ...

Page 19: ...stage ON 2nd stage ON 2nd stage OFF 3rd stage OFF 1st stage OFF 1st stage OFF 2nd stage OFF 3rd stage OFF SP 1 5 SP 1 0 SP 0 5 SP SP 0 5 SP 2 0 Stg1 Differential Stg3 Differential Stg2 Differential SP 2 5 SP 3 0 SP 3 5 Stg1 Differential Stg3 Differential Stg2 Differential Figure 12 Heating dual fuel 3 stage 2 compressor 1 backup Stg4 Diff H C Stages Locked YES H C Stages Locked NO 3rd stage ON 1st...

Page 20: ...ime span the sched ule must be turned OFF The setpoint is maintained indefi nitely 1 From the home screen press SCHED to turn the scheduled programming OFF 2 Press the UP or DOWN arrow to set the temperature to the desired temperature The information display field continues to display the active mode outdoor temperature indoor relative humidity Turning the schedule back ON press SCHED box on home ...

Page 21: ...icator will not be acti vated even if the timer is expired Note that setting filter re minder to 0 OFF will not reset the timers but will deacti vate the filter indicator In the case of a power interruption S lithium battery has charge the total accumulated time is maintained i e the counter does not recycle to zero S lithium battery has NO charge the due date of re minders is maintained Unit Part...

Page 22: ...loser than 2ºF 2nd stage lock in temperature 20ºF to 75ºF OFF Temperature Operation Heat Pump Heat Only HBSP Heat Pump or Gas Oil Heat LBSP Gas Oil Heat Only Indoor heat demand YES NO Gas oil heat non HP demand W1 or EM heat demand YES NO ODT above LBSP 3 YES Compress or speed 1 Y1 only ODT stg2 Y2 lock in temp NO YES HP stage demand Stg1 Stg2 Energize Y1 B G and start upstage timer Energize Y1 Y2...

Page 23: ...TUAL TERMINAL LAYOUT TYPICAL 2 STAGE OUTDOOR UNIT PUR OUTDOOR SENSOR X2658 BLK Y1 Y2 JUMPER OR ON BOARD CLIPPABLE LINK IN FOR SINGLE STAGE COOLING REMOVED FOR 2 STAGE COOLING RED BLK PUR EDA UNIT FAN RELAY REMOVE Y1 TO DS OR R TO DS JUMPER IN INDOOR UNIT FOR HUMIDITROL APPLICATION NOT REQUIRED FOR APPLICATIONS WITHOUT LSOM NOT REQUIRED FOR SINGLE STAGE NOTE FAN RELAY NOT REQUIRED WITH SINGLE SPEED...

Page 24: ...506230 01 05 09 Page 24 Appendix A Flow Diagrams and Wiring Diagrams continued Figure 21 Thermostat Wiring Diagrams ...

Page 25: ...r to re place thermostat EEPROM error Oper ating MEMORY ERROR CALL FOR SERVICE Contact Info Screen System shall operate in normal mode operation until power off User call the dealer to re place thermostat Outdoor Sensor error with Humiditrol en abled OR ODT was used for balance point control only outdoor sensor reads out of range 50F to 180F NO OUTDOOR SENSOR REMIND SERVICE See REMIND SERVICE note...

Page 26: ...yed Replace Thermostat Hum sensor error Without Humidifier or Dehumidifier sensor reads out of range 0 to 100 HUM SENSOR ERROR REMIND SERVICE See REMIND SERVICE notes The reading for humidity will not be valid This message in dicates something seriously wrong with the thermostat The display of Indoor Humidity from HOME will be turned OFF If user turns it on again the error is displayed Replace The...

Page 27: ...ne has Date Time info on it Is user de selects from User settings or higher priority re minder error occurs Indoor Humidity when selected from User settings INDOOR RH XX Date Time Displayed on first line Second line has Date Time info on it Is user de selects from User settings or higher priority re minder error occurs Schedule ON User turns on the schedule SCHEDULE ON Date Time Message is display...

Page 28: ...tage W1 W2 W1 W2 W1 W2 W1 W2 Cool Stages 1 1 1 2 2 2 1 1 1 2 2 2 1 1 1 2 2 2 1st Cool Stage Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 Y1 2nd Cool Stage Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 Y1 Y2 Indoor Heat Stgs X X X X X X X X X X X X Outdoor Sensor X X X X X X X X X X X X X X X X X X Residual Cool X X X X X X X X X X X X X X X X X X Low Balance Pt X X X X X X X X High Bal anc...

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Lennox ComfortSense 7000 series, Programming And Application Manual

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