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Lennox ComfortSense 7500, Installation And Setup Manual

The Lennox ComfortSense 7500 is a state-of-the-art thermostat that allows you to have complete control over your home's temperature. To fully harness its potential, it is crucial to have the user manual at hand. Download the comprehensive user manual for free from our website for a seamless experience.

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30

H/C
Stages
Locked =
NO

H/C
Stages
Locked =
YES

SET­
POINTS:

3rd stage

ON

1st stage

ON

2nd stage

ON

3rd stage

ON

1st 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 16. Heating - Heat Pump w/electric - 3 stage (2 compressor / 1 backup OR 1

compressor / 2 backup)

Summary of Contents for ComfortSense 7500

Page 1: ...Installation and Setup Guide Color Touchscreen Programmable Thermostat ComfortSense 7500 Model 13H14 507504 02 5 2017 Supersedes 507504 01 ...

Page 2: ...ornia to cause cancer birth defects or other reproductive harm Shipping and Packing List 1 ComfortSense 7500 7 day programmable touchscreen thermostat with back plate 2 Mounting screws M3 5x25mm self tapping screws 2 Wall anchors 1 Wall plate 1 Warranty certificate 1 each Homeowner and Installer Guides NOTE This thermostat is equipped with automatic compressor protection to prevent potentialdamage...

Page 3: ...uxiliary stages or two stages of heating and two stages of cooling Dimensions H x W x D Case dimensions 3 5 16 x 4 5 16 x 7 8 in 84 x 110 x 22mm Wall Plate Dimensions H x W Plate dimensions 4 1 2 x 5 3 4 114 x 146mm Compressor Short Cycle Protection A 5 minute compressor short cycle protection timer begins when a compressor output is de energized Also if a power loss occurs the system will go into...

Page 4: ...sor installation and thermostat setting configuration Figure 1 Outdoor Sensor IMPORTANT In all applications the ComfortSense Model 7500 thermostat can only be used with all residential units and approved commercial split system matches and those which meet the following installation criteria installation uses 18 GAUGE thermostat wire or larger thermostat wire run length DOES NOT EXCEED 300 91m loa...

Page 5: ...alled This thermostat is a 24VAC low voltage thermostat and requires a common wire to the thermostat to operate DO Shut off all power to system before installing Read this entire document noting which instructions pertain to your equipment and system requirements Make sure that all wiring conforms to local and national building and electrical codes and ordinances Use thermostat wire between the th...

Page 6: ...ood air circulation at average temperature 3 Do not install the thermostat where it can be affected by Drafts or dead spots behind doors and in corners Not close to entrance or automatic doors Not close to heat generating equipment such as kitchen equipment Not in an enclose environment unless a remote indoor sensor is used Hot or cold air from ducts Radiant heat from sun or appliances Concealed p...

Page 7: ... wall plate to install the thermostat CUT OR DRILL A SMALL HOLE FOR THERMOSTAT WIRING x A B PULL ABOUT 3 OF THERMOSTAT WIRE THROUGH OPENING AND RE MOVE OUTER THERMOSTAT WIRE JACKET THIS WILL HELP IN ROUTING THE THER MOSTAT WIRING TO THE PROPER THER MOSTAT TERMINALS ...

Page 8: ...END OF EACH WIRE C USE UNIT WALL PLATE AS TEMPLATE TO MARK DESIRED MOUNTING HOLE LOCATIONS ON WALL D USE A LEVEL ALIGN WALL PLATE DRILL 3 16 HOLES AT MARKED LOCATIONS ON WALL FOR ANCHORS E NOTE INSTALLATION OF WALL PLATE IS OPTIONAL ...

Page 9: ...o wall plate I Insert provided screws through back and wall plates into wall anchors J Attach thermostat to back plate Thermostat Installation without Wall Plate G Place back plate over wall anchors in wall F Insert wall anchors through wall plate into wall H Insert provided screws through back plate into wall anchors I Attach thermostat to back plate ...

Page 10: ...d provided wiring diagrams 3 Seal the hole in the wall with a suitable material to prevent drafts from entering the thermostat case 4 Configure thermostat and equipment for system type program the thermostat and test system TERMINAL DESIGNATIONS Tc Outdoor Temp Sensor Connection 1 To Outdoor Temp Sensor Connection 2 H Humidification relay to Humidifier D Dehumidification relay to DS terminal W2 Se...

Page 11: ...d touch settings and hold until the installer settings pop up window appears 3 Touch confirm to proceed 4 From the installer settings menu select outdoor sensor and select yes A green check mark will appear next to the selection that confirms selection 5 To display the outdoor temperature sensor information on the home screen from the home screen go to menu and touch settings This will take you to...

Page 12: ...12 Figure 3 Enhanced Dehumidification Accessory Typical Wiring Diagram ...

Page 13: ...13 Tc To To Tc Figure 4 CBX32MV XXX 230 06 or Higher and CBX40UHV Wiring Diagrams Condensing Unit Applications ...

Page 14: ...14 To Tc To Tc Figure 5 CBX32MV XXX 230 06 or Higher and CBX40UHV Wiring Diagrams Heat Pump Unit Applications ...

Page 15: ... BOARD LINK FORM DS TO R W914 CLIPPABLE CONNECTION ON FURNACE JUMPER ON AIR HANDLER WHEN DEHUMIDIFICAITON OR HARMONY CONTROL IS USED WHEN 2 STAGE HEAT IS USED THERMOSTAT IS CONFIGURED FOR MULIT STAGE HEAT CONNECT THERMOSTAT W2 TO AIR HANDLER W2 AND REMOVE JUMPER BETWEEN R AND W2 K183 DEHUMIDIFICATION RELAY KIT 26W62 REQUIRED WHEN USING D TO DS TERMINALS WITH CBX27 UNITS FOR 2 STAGE CUT ON BOARD LI...

Page 16: ...16 TSTA T TSTA T ML180 ML193 ML195 EL180E EL195E ELO183 SLO185 TSTAT ML180 ML193 ML195 EL180E EL195E ELO183 SLO185 To Tc CB30 and CBX32M Figure 7 Thermostat Wiring Diagrams continued ...

Page 17: ...17 TSTAT ML180 ML193 ML195 EL180E EL195E ELO183 SLO185 CBX25UH CBX25UHV CBX32MV TSTAT Figure 8 Thermostat Wiring Diagrams continued ...

Page 18: ...18 TSTAT EL280P TSTAT EL296E EL296V SL280V To Tc To Tc Figure 9 Thermostat Wiring Diagrams continued ...

Page 19: ...19 TSTAT CBX25UH CBX25UHV CBX27UH TSTAT CBX25UH CBX25UHV CBX32MV To Tc To Tc Figure 10 Thermostat Wiring Diagrams continued ...

Page 20: ...20 TSTAT ML180 ML193 ML195 EL180E EL195E ELO183 SLO185 TSTAT EL296E SL280V EL296V SLP98 To Tc To Tc Figure 11 Thermostat Wiring Diagrams continued ...

Page 21: ...n from the home screen 2 Touch and hold the settings option on the menu This will display the installer settings notice and then menu You may be asked for an access code The factory default access code is 864 installer settings confirm installer settings must be set by qualified person Figure 13 Installer Menu Screen Confirmation ...

Page 22: ...point options in the installer settings list 1 When in heat mode and the outdoor temperatureis below the programmed Low Balance Point then heat pump heating is not allowed and only backup heat will be used 2 When in heat mode and the outdoor temperatureis above the programmed High Balance Point then heat pump heating is allowed and backup heat will not be used 3 When in heat mode and the outdoor t...

Page 23: ... the control will start a recovery at the programmed time NOTE Smooth Set Recovery and Stage2 Lock Out operations vary depending on equipment see table 1 SSR STAGE 2 LOCK OUT Default is 20 minutes Use the or option to set the number of minutes before the programmed event time that stage 2 is allowed to operate 20 to 120 minutes in 10 minute increments Touch to return to previous menu This setting ...

Page 24: ...s needed Two stage heat pump with one or two stages of electric backup Run heat pump Y1 Y2 only All backup heat W1 W2 is enabled and SSR Stage 2 Lock Out is set between 20 120 minutes before the wake up set point Run heat pump Y1 Y2 and will have available backup heat W1 W2 as need ed Single stage heat pump with single stage gas or oil backup Run heat pump Y1 only All backup heat W1 is en abled an...

Page 25: ...and is needed which is determined by the time temperature differential Heat pump operation will stop and changeover to W1 W2 heat as need ed Lock in W1 W2 heat until set point is reached Two stage heat pump with one stage gas oil backup Run heat pump Y1 Y2 only All backup heat W1 W2 is enabled and SSR Stage 2 Lock Out is set between 20 120 minutes before the wake up set point Run heat pump Y1 Y2 u...

Page 26: ...is needed which is deter mined by the time temperature dif ferential Heat pump operation will stop and changeover and lock in to W1 W2 heat until set point is reached Two stages of gas oil heat or modulation furnace Run W1 only W2 is enabled and SSR Stage 2 Lock Out is set be tween 20 120 minutes before the wake up set point Run W1 heat and bring on W2 heat until set point is reached Single stage ...

Page 27: ...s used in all thermostats The default is 1 0 F but can be programmed between 0 5 and 8 0 F in 0 5 F increments Touch to return to previous menu STAGE 2 THROUGH 4 DIFF Where applicable The default is 1 0 F but can be programmed between 0 5 and 8 0 F in 0 5 F increments Touch to return to previous menu STAGE 2 THROUGH 4 DELAY Where applicable If STAGE DELAY TIMERS is turned ON the default delay is 2...

Page 28: ...uration Figures Multi stage Cooling for Heat Pump Non Heat Pump 14 Heating Non Heat Pump 1 or 2 stages 15 Heating Heat Pump with NO backup heat 10 Heating Heat Pump w electric heat 2 stage 1compr 1backup 10 Heating Heat Pump w electric heat 3 stage 2compr 1backup 11 Heating Heat Pump w electric heat 3 stage 1compr 2backup 11 Heating Heat Pump w electric heat 4 stage 2compr 2backup 12 Heating dual ...

Page 29: ...Differential Stg2 Differential Stg1 Differential Figure 14 Cooling 1 or 2 stages H C Stages Locked YES H C Stages Locked NO 1st stage ON 2nd stage ON 1st stage ON 2nd stage ON 2nd stage OFF 1st stage OFF 1st stage OFF 2nd stage OFF SP 1 5 SP 1 0 SP 0 5 SP SP 0 5 SP 2 0 Stg1 Differential Stg2 Differential SP 2 5 SP 3 0 Stg1 Differential Stg2 Differential SET POINTS Figure 15 Heating Non Heat Pump o...

Page 30: ...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 16 Heating Heat Pump w electric 3 stage 2 compressor 1 backup OR 1 compressor 2 backup ...

Page 31: ...ge 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 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 17 Heating Heat Pump w electric 4 stage 2 compressor 2 backup ...

Page 32: ...ackup H C Stages Locked NO H C Stages Locked YES SET POINTS 3rd stage ON 1st stage ON 2nd stage ON 3rd stage ON 1st 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 Diff Stg2 Differential Figure 19 Heating d...

Page 33: ... 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 20 Heating dual fuel 3 stage 2 compressor 1 backup ...

Page 34: ...d 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 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 21 Heating dual fuel 4 stage 2 compressor 2 backup ...

Page 35: ...new name touch the done key to return to the customer reminder screen To set a reminder go to the User Settings screen and select reminders The reminder setting screen will appear and a list all of the predefined reminders plus the two custom reminders will appear at the end of the list Scroll to CUSTOM REMINDER 1 or 2 or renamed titles Touch the title to select the reminder By default all reminde...

Page 36: ...hermostat to achieve energy savings Scroll to ENERGY SAVING DEFAULT touch to select Read the message on the screen and to continue touch CONFIRM 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 Select system test mode A p...

Page 37: ...t mode All HVAC components can be tested to confirm the signals between thermostat and unit are being sent and were received NOTES After 5 minutes without a test being initiated the test modes is disabled and system goes back to the normal mode i e HOME screen When in SYSTEM TEST MODE the compressor minimum off timer is bypassed Humidify Humidification adding moisture to air is provided only when ...

Page 38: ...tion based on outdoor temperature Dew Point Max Runs humidification with a humidification call but without a call for heating based on outdoor temperature A selection option under Installer settings Humidity settings Humidify Humidify mode must be enabled before the user will have control over the humidity The humidity mode selected determines how the user can adjust the relative humidity RH The i...

Page 39: ...ode When a dehumidification demand is present a dehumidification signal 0VAC open circuit is present at the D terminal This is used to reduce the speed of the indoor blower during dehumidification At the same time the Y1 and Y2 if available terminals become activated with 24VAC The H terminal is inactive 0VAC open circuit during dehumidification System must be in cool mode and had one call for AC ...

Page 40: ...er settings Humidity settings Dehumidify Dehumidify mode must be enabled before the user will have control over the humidity The mode selected determines how the user can adjust the relative humidity RH The installer settings include 1 NORMAL 2 MAX 3 AUXILIARY DEHUMIDIFIER 4 HUMIDITROL 5 OFF NORMAL In this mode dehumidification occurs if these conditions are met and signals are present at specific...

Page 41: ...MID setting If a Humiditrol EDA is installed and enabled then the thermostat must be configured to properly operate the Humiditrol EDA as follows see Figure 22 for the Humiditrol EDA operation flowchart Check the HUMIDITY SETTINGS in user settings to confirm that the user has turned ON dehumidificationsetting NOTE Humiditrol EDA operation requires use of an outdoor sensor If sensor is not connecte...

Page 42: ...r Fault If the humidification sensor fault occurs then the H terminal becomes inactive and the D terminal goes to 24VAC Dew point adjust is only available when an outdoor sensor is attached Other Humiditrol EDA Notes If the outdoor sensor is disconnected while HUMIDITROL is enabled the thermostat will not allow operation in dehumidification mode Set point range 45 to 60 Relative Humidity RH Factor...

Page 43: ... thermostat is able to shut off heat relays Y1 Y2 W1 W2 when in heating mode and W1 and W2 when in cooling mode The O and B relay will maintain their last state When power is restored the thermostat will be in heat cool mode so either mode can run to re satisfy the temperature setting in the home Day and time schedules may be off due to battery loss User Settings Please refer to the user guide for...

Page 44: ...ES NO NO NO NO YES ONE OR BOTH TRUE NEITHER IS TRUE Is there a cooling demand Is there a dehumidification demand DEACTIVATE ALL EQUIPMENT RUN EQUIPMENT IN NORMAL HEAT ING MODE RUN EQUIPMENT IN NORMAL COOL ING MODE Is EITHER true outdoor temp 95ºF indoor temp 65ºF Humiditrol Com fort Adjust setting is RUN HUMIDITROL START Is there a heating demand YES Figure 22 Thermostat Operation with Humiditrol ...

Page 45: ...low 96 F 35 6 C the system resume operation 5 temperatur e sensor error 0 critical Local tempera ture sensor is out of range 40 F to 158 F There is a fi nite difference between main thermistor and sub thermistor which is greater than 5 F Indoor temp is displayed as on the home screen This will STOP all temperature re lated operation All stages of heat are turned off by safety relay This error is d...

Page 46: ...error Power ON System will restore using to Energy Star defaults and re sume operations This error is displayed on no tification screen Thermostat will need to be replace 8 memory error 0 critical EEPROM error Operating System will operate in nor mal mode operation until power off This error is displayed in no tification screen Thermostat will need to be replace ...

Page 47: ... continue to operate Thermostat will stop the sys tem operation if input from re quires outdoor temperature in formation when any of these conditions i e balance point control and 2nd stage lock in are applicable System will de fault to mode of operation that does not required input from the outdoor temperature sen sor The temperature display on the home screen will be disabled If user turns on th...

Page 48: ...ormal operation 95 99 Ther mostat may detect error 100 Ther mostat will de tect error All humidity operation will stop and the reading for hu midity will not be valid This message indicates hum sensor is not working cor rectly The display of Indoor Humid ity from HOME will be This error is displayed in no tification screen Either thermostat will have to be replace or if the sensor returns to norma...

Page 49: ...umidity sensor error 1 critical Without humidifi er or dehumidifi er and the sen sor reads out of range 0 to 100 The reading for humidity will not be valid This message indicates hum sensor is not working cor rectly The display of Indoor Humid ity from HOME will be This error is displayed in no tification screen will resume operation ...

Page 50: ...ction to Clear Recovery Condition 12 replace media filter reminder Touch either done to clear the reminder or remind later button 13 replace UV lamp 14 replace humidity pad 15 routine system check up 16 replace metal insert for pure air 17 user editable 18 user editable ...

Page 51: ...g 2nd Em heat Stg Cool Stgs 1st Cool Stg 2nd Cool Stg HP GAS OIL 1 1 2 Y1 W1 W1 1 Y1 HP GAS OIL 1 2 3 Y1 W1 W1 W2 W1 W1 W2 1 Y1 HP NONE 1 0 1 Y1 1 Y1 HP GAS OIL 2 1 3 Y1 Y1 Y2 W1 W1 2 Y1 Y1 Y2 HP GAS OIL 2 2 4 Y1 Y1 Y2 W1 W1 W2 W1 W1 W2 2 Y1 Y1 Y2 HP NONE 2 0 2 Y1 Y1 Y2 2 Y1 Y1 Y2 HP ELEC 1 1 2 Y1 Y1 W1 W1 1 Y1 HP ELEC 1 2 3 Y1 Y1 W1 Y1 W1 W2 W1 W1 W2 1 Y1 HP NONE 1 0 1 Y1 1 Y1 HP ELEC 2 1 3 Y1 Y1...

Page 52: ...eat Stg 3rd Heat Stg 4th Heat Stg 1st Em Heat Stg 2nd Em heat Stg Cool Stgs 1st Cool Stg 2nd Cool Stg Non HP GAS OIL OR ELEC 1 2 2 W1 W1 W2 1 Y1 Non HP NONE 1 0 1 Y1 Non HP GAS OIL OR ELEC 2 1 1 W1 2 Y1 Y1 Y2 Non HP GAS OIL OR ELEC 2 2 2 W1 W1 W2 2 Y1 Y1 Y2 Non HP NONE 2 0 2 Y1 Y1 Y2 ...

Page 53: ...sunlight or dis charge air vents 3 Has the thermostat been wired correctly based on the type of equipment installed air handler outdoor unit and accessories 4 Is the thermostat wiring secured tightly to the terminals 5 Is the common wire terminal C connected 6 Has the System Test Mode located under the installer settings been used to verify proper operation ...

Page 54: ... 39 Auxiliary Dehumidifier 41 Humiditrol 41 Max 40 Normal 40 Diagnostic Information 45 Dimensions Thermostat 3 Wall Plate 3 E Edit Schedules 43 Energy Saving Defaults 36 Enhanced Dehumidification Accessory 12 F Fan Operation 43 H Humidification Sensor Fault 42 Humidify 37 Dew Point Normal and Max 39 Normal and Max 38 Humidity Offset 23 Humidity Setting 35 I Installation Checklist 53 ...

Page 55: ...ance Reports 43 R Reminder Information 50 Reminders 43 Reset Settings 35 Residual Cool 22 S Screen Brightness 43 Screen Lock 43 Screen Savers 43 Screws 2 Smooth Set Back SSR 23 Smooth Set Back Stage 2 Lock Out 23 Stage 1 Differential 27 Stage 2 through 4 Differential 27 Stage Delay Differentials 27 Stage Delay Timer 27 Supported Configurations 51 System Setup 21 22 System Test Modes 36 T Temperatu...

Page 56: ...56 Terminal Designations 10 Thermostat Installation 6 U Unit Part Catalog Serial Numbers 42 User Settings 43 W Wall Anchors 2 Wiring Diagrams 12 13 14 15 16 17 18 19 20 Wiring Thermostat 10 ...

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