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1. Heating Rate Blower CFM Demand 1400CFM Blower Off Delay Off Blower On Delay Off Indoor Blower RPM 0 Indoor Blower Power 0 0000 Flame Current 0 000mA Flame Sense No Flame Outdoor Temperature 63 F cancel J g next 9 39 am Aug 15 2012 r Figure 23 Typical Tests Results Screens aN setup C tae equipment anre diagnostics The Testing Process is finished press tests button to run more tests press EXIT button to start normal operation cancel next Gey C Figure 24 Testing Finished Screen DEHUMIDIFICATION AND ZONING SOFTWARE VERSION 2 13 When using the iHarmony zoning system dehumidification is disable and not supported at this time except for Humiditrol and auxiliary dehumidification modes See Service and Application note ACC 13 05 for further details 9 39 am Aug 15 2012 7 Day Programmable Communicating Thermostat Connecting to a Home Wi Fi Router A IMPORTANT Never use the home router s guest account Also do not use any unsecured no security encryption is enabled or public Wi Fi access Check the router utility program or contact service provider for help When determining the location for the Wi Fi thermostat be sure it is in an area near enough to the homeowners Wi Fi router to ensure good communications signal between the thermostat and the router Hint Use a smart phone with Wi Fi
2. Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button aoe Priority Alert Text Steps to clear Thermostat Furnace Air Handler Outdoor Unit Equipiment Interface Pa Module Damper Control Module The F ale i 131 Critical Thermostat furnace air handler or Reconfigure the system Replace the control if heating or cooling is not available outdoor unit control parameters are corrupted Air Handler Damper Control Module Rec a anit oi ycle power If failure re occurs replace the control System reset is required to 132 Critical i device s control software is corrup recover In normal operation after control recognizes sensors the alarm will be sent if valid Furnace Air Handler Outdoor Unit temperature reading is lost Compare outdoor sensor resistance to temperature Equipiment Interface Module The ther resistance charts in unit installation instructions Replace sensor pack if necessary 180 Critical mostat has found a problem with the At the beginning of any configuration furnace or air handler control will detect the furnace air handler or outdoor unit presence of the sensor s If detected reading in range appropriate feature will be outdoor sensor set
3. DAS NOTE ON PAGE 54 iComfort Wi Fi THERMOSTAT GREEN c OUTDOOR AIR SENSOR WHITE x YELLOW I 7 RED DISCHARGE AIR SENSOR R Maximum total length of all connec tions on the RSBus is limited to 1500ft Wire gauge of RS Bus wire is 18 RSBus A Setup Note Cut Y1 Y2 On board Link For 2 stage Outdoor Units iComfort Wi Fi Thermostat OUTDOOR UNIT THERMOSTAT OPTIONAL OUT DOOR AIR SENSOR SEE OAS NOTE ON PAGE 54 ase STANDARD OUTDOOR AIR CONDITIONING UNIT 1 OR 2 STAGE YL 2 STG ONLY LSOM ONLY BL 2 LSOM ONLY 292999095 Booo booo poo iComfort by Lennox Indoor Furnace or Air Handler Standard Outdoor Condensing Unit AC Figure 13 iComfort Communicating Indoor Non Communicating Outdoor System Wiring iComfort Wi Fi Page 53 7 Day Programmable Communicating Thermostat GREEN iComfort i ee c A iComfort indoor YELLOW Wi Fi i RED OOOO i unit unit 7990 3ddS RSBus Equipment Interface Module EIM See Equipment Interface Module Installation in structions for additional configurations R Conventional 24V AHC or Furnace or Air Handler 1 or 2 Stage ISo Hw Figure 14 iComfort Wi Fi Equip
4. SESE z m Cc 2 Figure 16 Optional Accessories Wiring FOR USE WITH ANY ICOMFORT BY LENNOX SYSTEM iComfort by Lennox iComfort by Lennox SLP98 amp G71MPP FURNACE LVCS Ventilation Control System icomfort by iComfort by 2 STAGE FURNACE IFC OR AIR HANDLER AHC 9 5 Lennox Lennox we OAD O PWT e Peaibacnal Outdoor Air 5 Dasz LHS E x my AE eliler Conditioning CET 1S Be lo z or Heat Pump o3 319 sael il H an iComfort WiFi 2 S LO da lz i L me _ E 5a els YELLOW Thermostat z R B i S amp H H AHMM FREEZE cS GREEN TO ex E 5 RISH OFF RED SWITCH WHITE vd a Gi i Q Oli g glo CONDENSATE POWER COMPANY INTERRUPTION i YELLOW 2 1 Plas OVERFLOW i O wep TS eavacl Ves i LU s SANEA SYSTEMS ARE WIRED SAME AS RIIS Q R A TRANSFORMER T 7 OVERFLOW SWITCH RSBus I A 26L56 Current sensi Olt von Le Te auTponR ee Current sensing 6 i 3 NDOOR Vann b gt TS TEMP andar relay kit Oles BLOWER DAMPER i sol Y1 or 2 stage
5. Max length between components is 300 ft 90 m Page 54 FOR USE WITH ANY ICOMFORT BY LENNOX SYSTEM iComfort by Lennox NOTE iComfort Wi Fi THERMOSTAT SENSES HUMIDITY amp CONTROLS 24V H OUTPUT amp 120V H OUTPUT SLP98 amp G71MPP FURNACE TO CYCLE HUMIDIFIER BASED ON DEMAND NO OTHER CONTROL OR HUMIDISTAT REQUIRED IFC OR AIR HANDLER AHC OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIFIER IF NOT ALREADY IN THE SYSTEM FOR OTHE FUNCTIONS BUILT INTO ALL iComfort by Lennox OUTDOOR UNITS SEE OAS NOTE ON PAGE 81 For SL290 amp EL296 see HUMIDIFIER diagram M HCWH 01 below bottom right DEHUMIDIFIER CONTROL 48G95 RELAY Pr OO e steam iComfort Wi Fi S GND HUMIDIFIER Py THERMOSTAT S QO 48G95 RELAY GREEN Sle DISCHARGE AIR SEN SOR REQUIRED FOR EVEN HEAT SEE DAS NOTE ON PAGE 81 DISCHARGE AIR SENSOR O 120VAC or 240VAC OUTDOOR AIR SENSOR 1 e HCWP2 POWER L e HUMIDIFIER HVAC EQUIPMENT WHITE YELLOW dINOA OWAH i R RED ION HOM 4DS5 40 44 AUXILIARY HCWB2 HCWB3 HCWP3 DEHUMIDIFIER 24VAC BYPASS AUXILIARY DEHUMIDIFIER 090 amp 135 HUMIDIFIER capacities only 065 not compatible 120VAC iComfort by Lennox SL280 EL296 FURNACE HRV2 ERV2 WIRI
6. Thermostat iComfort by Lennox Indoor Furnace or Air Handler iComfort by Lennox Outdoor Condensing Unit or Heat Pump 00O OVOO OW OW OUTDOOR UNIT 2 Maximum total length of all connections on the RSBus is limited to 1500ft Wire gauge of RSBus wire is 18 RSBus Figure 12 iComfort Communicating System Wiring iComfort by Lennox AIR HANDLER AHC iComfort by Lennox FURNACE IFC OR AIR HANDLER AHC OPTIONAL DIS CHARGE AIR SENSOR SEE h DAS NOTE ON PAGE 54 iComfort Wi Fi THERMOSTAT GREEN c OUTDOOR AIR SENSOR DISCHARGE AIR SENSOR 00202 WHITE i YELLOW RED R RSBus Maximum total length of all connec tions on the RSBus is limited to 1500ft Wire gauge of RS Bus wire is 18 HP A iComfort Wi Fi Thermostat iComfort by Lennox Air Handler Standard Outdoor Heat Pump OUTDOOR UNIT OPPO OE 2o22 Looe THERMOSTAT OPTIONAL OUT DOOR AIR SENSOR SEE OAS NOTE ON PAGE 54 BES Setup Notes Cut Y1 Y2 On board A A Link For 2 stage Out door Units Cut R O On board Link For Outdoor Heat Pump Units STANDARD OUTDOOR HEAT PUMP UNIT 1 OR 2 STAGE rO o S wm O v LO v2 IOL LSOM ONLY LOR LS c Y2 OUT BL OPTIONAL DIS CHARGE AIR SENSOR SEE oe
7. To adjust a setting highlight it then press Edit Air Conditioner a Q resetAll Gas cs e Parameter Name Defaut Parameter Value Setting Increment Press edit to change name up to 35 characters may be Equipment Name Outdoor Unit used f i a Note Pressing the resetALL button will reset all custom parameter settings back to factory default Compressor Short Cycle Delay 300 Seconds 60 to 300 Seconds 60 Sec High Normal Cooling Airflow XC25 only 1600 450 to 2150 25 Low Normal Cooling Airflow XC25 only 750 450 to 2150 25 Dehum Airflow Adjustment Adder 0 0 to 30 1 Table 4 System Devices gt Heat Pump system devices System Heat Pump Furnace Thermostat To adjust a setting high light it then press Edit Heat Pump about D A resetAll a es See ma C Parameter Name Defaut Parameter Value Setting Increment Press edit to change name up to 35 characters may be used Pressing the resetALL button will reset all custom parameter Equipment Name Outdoor Unit settings back to factory default Note The resetALL function is required when replacing the outdoor unit control with a new control part number 103369 04 Performing the resetALL task will enable new defrost parameters to be accessible Compressor Short Cycle Delay 300 Seconds 60 to 300 Seconds 60 Sec Compressor Shift Delay On Off On On Off
8. To adjust a setting highlight it then press Edit system devices ee g wae D De humidification Control Mode Air Conditioner Furnace System Thermostat Humiditrol System 3rd Stage Delay 4th Stage Delay Lock In 2nd Stage HP by Outdoor Temp Balance Point Control current value Midpoint Overcooling ieee Humiditrol Comfort Adjust lin De humidification Setpoint Humiditrol Comfort Adjust l idificati i f Mam edit Maximum Overcooling Midpoint Overcooling Select one 1 In the system devices list use the arrows 1a to highlight System Press edit 1b 2 Humiditrol only in the System list use the ar rows 2a to highlight Humiditrol Comfort Adjust The current value defaults to Maximum Overcooling Press edit 2b 3 Humiditrol only Press one of the radio buttons 3a to select the overcooling level press save 3b After saving check that the current value now shows the new Selection 4 Use arrows 4a to highlight Min De humidification Setpoint press edit 4b Note the current value e g 45 5 Use arrows 5a to make changes press save 5b After saving check that the current value now shows the new selection 6 Press the back button to return to Adjust a set ting screen Minimum Overcooling System Staged Delay Timers 2nd Stage Delay 3rd Stage Delay 4th Stage Delay Lock
9. air handler CBX32MV or CBX40UHV with an iComfort heat pump XP17 XP17N XP21 XP21N or XP25 unit IMPORTANT Be sure to set up the air handler control for heat strips if used prior to powering up the system and thermostat 1 2 507343 01 Configure air handler control AHC for auxiliary heat strips if used Wiring See Communicating System and optional accessories Wiring diagrams 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the air handler R i i C e 4 conductor thermostat wire from the air handler terminal strip to the iComfort heat pump R i i C e Wiring as required for accessories DO NOT cut any option link on air handler control After the entire system is wired power up the system the iComfort Wi Fi thermostat will check the system for installed communication devices On the thermostat go past the Add or remove setting screen Select System from the device list using the up down arrows and press the edit button Select Balance Point Control and press edit Use the down arrow to select Enabled and press save High and Low Balance Points will appear in red Complete Balance Point Control by editing the High and Low Balance Points It is not necessary to change the defaults but you must save each setting The red settings will go away after pressing save Press the back button to return to the adjust screen Use the arrows to select
10. l a POWER NOUR AC or HP NOTE Pass the blower Rg OGO BLOWER CONDENSATE unit motor L1 wire through the CURRENT y MOTOR OVERFLOW current loop on the current HO W SENSOR nae iComfort by Lennox SWT OTHER OUTDOOR sensing relay as shown wO H s Furnace or Air Handler THE SAME REFER TO De D SPECIFIC DIAGRAM HVAC Heat or Cool call or RS LE IT lt the fan is in continuous c O lt operation the ventilation Ore L HEPA Bypass Filter X2680 HEPA Interlock Kit controller will open Q7 L2 9 OA damper to ventilate if the W 5 lt A DH O Pass indoor outdoor temperature and indoor humidity RIO O blower motor are within the limits of the ventilation controller Or p gt a common wire al through cur LVCS Set cycle time to 1 hour set ventilation time to 60 minutes CURRENT rent loop SENSOR See HEPA In NOTE Use the iComfort circulate fan percentage of ON TIME to iComfort by Lennox RANN terlock Kit for control ventilation time Furnace or Air Handler L RELAY details Figure 17 Optional Accessories Wiring iComfort Wi Fi Page 55 7 Day Programmable Communicating Thermostat Thermostat Wire Termination in Communicating System RSBus Minimum wire size is 18 gauge Outdoor Unit Indoor Unit Controller Note iComfort Wi Fi thermostat does not require shielded cable wiring iComfort Wi Fi thermostat Single wire
11. 2 Thermostat will increase the firing rate by 5 every 5 minutes up to 100 if third stage thermostat is not satisfied If thermostat third stage demand is satis fied the current firing rate will continue until all ther mostat demands are satisfied Fourth level heat demand added iComfor thermostat will immediately set variable capacity furnace firing rate to 100 until all thermo stat demands are satisfied 507343 01 Variable Capacity Control of Gas Heat Mode G71MPP and SLP98V The thermostat includes a feature that provides variable capacity control of the gas heat mode The purpose of variable capacity control is to keep the room temperature at or near the desired set point with minimum system cycling The thermostat bases its decisions for furnace operation control using the following inputs e Room temperature e History of cycle times how long does it typically take to bring the room temperature to the desired set point e Target set point and e Differential temperature settings between 1st 4th stage The thermostat uses this information to vary the heating capacity to efficiently satisfy the heating demand The full range of the furnace heating capacity low end is a percent of the 1st stage capacity high range is 100 of full capacity is used When in variable capacity gas heat mode the furnace operation includes longer run times at lower heat stages Table 9 details the v
12. 2nd set Humiditrol comfort adjust overcooling and the min max dehumidification setpoints if desired see page 18 w system devices Add or Remove Non ag System Fuma s System equipment Heat Pump Furnace Thermostat Humiditrol Figure 8 Add Non Communicating Device Dehumidifier iComfort Wi Fi Page 7 7 Day Programmable Communicating Thermostat Adjusting System Device Settings 1 Press any component listed under system devices A to change specific communicating equipment para System Low HO eee meters and edit details of devices in the system Equipment Name fe ive A F Heating Airflow Control Type 2 Use the arrows to highlight a setting and then press 400 aD edit figure 9A In the example the low heating air High He pel flow is changed from the default 400 to 325 figure High Ci 9B After changing press save note the current Airflow High Hi System Low Heating Airflow value has changed figure 9C Some changes may Continuo Equipment Name C affect other settings and if so those affected will Heating Heating Airflow Control Type current value B appear in red and require changing saving to clear Low Heating Airflow 325 the red settings 9 39 i ae oH Low Heating Airflow edit 3 When finished press back equipment parameters Airiow Profie C Ane nage moea m screen then press next Select test
13. Make sure there is an iComfor indoor unit on the system Check R i i and C connec tions ohm wires and cycle power Replace indoor unit control board if there is no response No electric heat operation The thermostat system setting does not offer a emergency heat choice on an HP system The thermostat does not offer any heat choice on an AC system with air handler with electric heat Electric heat was not manually configured configured at the Air Handler Control AHC before theiComfort Wi Fi system dis covery process at initial power up Manually configure to discover the electric heat section s on the air handling see Page 56 or CBX32MV or CBX40UHV manual for details Re setup the iComfort system by selecting the setup button in the Installer program and press start to begin system discovery then reconfigure the system Thermostat Displays System Waiting message and the furnace does respond to a heating de mand no red critical alert icon or alert messages are displayed on the thermostat The furnace is in watchguard mode moderate alert and will not display the red critical alert icon nor be displayed in the homeowner alert button Go to the installer program alert button to view all alerts and de tails about those alerts If the furnace is in watchguard mode the furnace can be reset from the Home screen by setting the thermostat system settings to
14. Normal Defrost Sequence Defrost starts Defrost starts Defrost starts with reversing valve in cooling Defrost runs with reversing valve in mode and outdoor fan OFF cooling mode and outdoor fan OFF Coil sensor reaches termination When outdoor coil sensor reaches 90 F temperature or defrost time reaches 14 outdoor fan cycle ON at low speed minutes approximately 100rpm Defrost terminates Fan ON time reaches 5 minutes or coil sensor reaches 110 F or defrost time reaches 19 minutes Defrost terminates Note If the defrost terminates by reaching the maximum allowed defrost time it is not considered a successful defrost and the unit will enter defrost again after 30 minutes of compressor heating run time with the coil sensor below 35F Figure 40 Automatic Max Defrost Selection and Sequence of Operations iComfort Wi Fi Page 33 7 Day Programmable Communicating Thermostat Heat pump control monitors mode of operation through outdoor ambient coil temperatures and compressor run time to determine when a defrost cycle is required Note No system alert codes can be active for defrost calibration to be achieved Notes a When the HP enters defrost ig sensor below No attempt to Defrost Calibration Coil sensor detects temperatures below 35 F 2 C during any of the following Initial power up e After loss of power e After cooling mode A
15. Outdoor Unit The discharge line tem Discharge line high temperature error count reached 5 strikes Make sure coil is 415 Critical perature has been consistently higher clean and airflow unobstructed in and out of condenser Check system charge us than the recommended upper limit of ing approach and sub cooling temperatures Reset by putting outdoor board in test 279 F mode or resetting low voltage power 9 utaoa ent Tne ha Wier ae Sensor being detected open or shorted or temperature is out of sensor range 416 Critical temip rature iout of sensor range As Outdoor unit control will not perform demand or time temperature defrost operation a result the outdoor unit control will not perform any defrost tempering System will still heat or cool Clears when outdoor unit control detects proper sensor readings 507343 01 table continued on next page Page 46 Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button an Priority Alert Text Steps to clear Outdoor unit control detects open or shorted sensor or temperature that is out of 0 SCE Bae APS ounonrunit PA sensor range Critical Alert after 10 minutes Reset by replacing sensor This fault is 417 Critical tem pest is out of sensor randa As de
16. Outdoor Unit The inverter has detected a PFC circuit over current condition Outdoor Unit The inverter has detected a DC link high voltage condition Outdoor Unit Compressor phase current is too high Outdoor Unit Outdoor control has lost communications with the inverter for greater than 3 minutes Outdoor Unit Inverter internal error Outdoor Unit Inverter heat sink temperature exceeded limit Outdoor Unit Heat sink temperature sensor fault has occurred temperature less than 4 F or greater than 264 F after 10 minutes of operation Outdoor Unit The inverter has detected a PFC circuit over current condition Outdoor Unit Compressor slowdown due to high input current On a call for compressor operation if DC link power in inverter does not rise above 180 VDC for 2 and 3 ton models 250 VDC for 4 and 5 ton models within 30 seconds the control will display a moderate code If condition is detected outdoor unit will stop Com pressor and fan Anti short cycles is initiated If condition occurs 10 times within a 60 minute rolling time period system will lock out and display a critical code If DC link power in inverter does not rise above 180 VDC for 2 and 3 ton models 250 VDC for 4 and 5 ton models within 30 seconds the control will display a moderate code 2 Capacitors on inverter do not properly charge 1 This is a moderate code The outdoor control anti short timer will time out and the uni
17. Zoning Target Supply Air Temp fo 1 Zoning Target Supply Air Temper Zoning Target Supply Air Temper Zoning Supply Air Temp Limit for Zoning Supply Air Temp Limit for HP heating lockout time Cooling g reset current value Q edit B Zoning Target Supply Air Temp for Cooling Range is 45 to 60 F Default is 45 inc 1 set to 6 45F AA _ save cancel 9 39 am Aug 15 2012 Figure 19 Adjusting System Devices gt System Parameters for iHarmony Zoning System iComfort Wi Fi Page 21 7 Day Programmable Communicating Thermostat ZONING CONTROL ADJUSTING SYSTEM DEVICES ZONING CONTROL SETTINGS System Devices gt Zoning Control 1 In the system devices screen figure 20 use the arrows A to highlight Zoning Control and press edit B 2 Touch one of the options C to select Zone 2 Temp Reading Calibration Press edit D to con tinue 3 Use up or down arrows E to change the value 4 Press save F System Furnace Thermostat 2 Stage HP Unit Power 120VAC Humidifier Zoning Control system devices To adjust a setting z z highlight it then press about A Edit furnace reset All B edit Zoning Control Zone 2 Temp Reading Calibration After completing the Zone Control settings press the back button to continue If all system settings have been completed then from system devices screen continue by pressi
18. Basic Humidification Control Mode The current value defaults to Humiiicoion Conto Made D ea _ Basic mode Press edit 2b 3 Touch one of the radio buttons 3a to select the mode of reuba oon 7 Mumidincation Control Mode reset humidification control press save 3b After saving p Display Only Basic check that the current value now shows the new Precision Ga Basic Dew Point Control D selection Precision Dew Point 4 Press the back button to return to Adjust a setting Li screen NOTE If the defaults for the settings shown in red you are not cancel gt required to make any changes but you must go into the edit tool and press save 5b When all red text is gone the back button will appear press it to return to the Adjust a setting screen Figure 14 Adjust a Non Communicating Device Setting Humidification FEATURE SCREEN HUMIDIFICATION SETTINGS 1 From the main screen press the right arrow icon to go the the Features screen SYSTEM SETTINGS humidification De humidification 2 From the Features screen select system settings settings S ngs 3 Touch the button of the humidification settings you 507 ea want to adjust if it says humidifier OFF one touch will cia MEDIUM vom 50 50 to display a selection for ON default is ON 4 When you touch the set to button the arrows appear ra ane mno allowing you to change to the desired humidity p
19. Cool and Heat Pump Systems When a in zone thermostat makes a demand for heating the zone damper opens and heating equipment begins operating Dampers will closed for any zone with no heating demand Heating demand is terminated when 1 All zone demands for heating are terminated 2 The demand has exceeded the heat cool changeover time limit 20 minutes while a cooling demand exists When heating demand is terminated a 5 minute minimum off time delay is initiated Second stage heating is energized if the discharge air temperature is lower than the set point of the heating staging temperature set point Under system devices use the following procedures to adjust various zoning control parameters a complete list of all available parameters are listed starting on page 8 System Devices gt System A complete list of available zoning parameters un der System is provided in table 2 on page 8 1 In the system devices screen use the arrows A to highlight System and press edit B 2 Touch one of the options C to select for ex ample Zoning Target Supply Air Temp for Cooling Press edit D to continue 3 Use up or down arrows E to change the value 4 Press save F To adjust a setting system devices Caout D C edit B highlight it then press Edit A furnace O Furnace Thermostat 2 Stage HP Unit Zoning Control System Zoning Target Supply Air temp for Equipment Name
20. DIP SW variable capacity furnaces only Low and high heating air flow is dependent on model of indoor unit 0 Fixed CFM 1 Fixed DAT DATS installed See furnace documentation IOM or Product Specifica tions for size specific information Default DAT value is rounded to the closest number on 5 deg F resolution and limited by Minimum and Maximum value Cooling Airflow Settings Min Max High Cooling Airflow pipor unit CFM CFM Outdoor Unit CFM 100 cool i resent CEM A009 coc aoocrm Min Max 1 HP blower Min Max Low Cooling Airflow Spe ARG CFM CFM 2 stage Outdoor CFM lowest cool stage P abie Min Max Unit present CFM CFM 1 2 HP blower 1 2 HP blower 1 HP blower 507343 01 Page 12 Heat Pump Airflow Settings Outdoor unit yn Max 1 2 HP blower High Heat Pump Airflow A CFM CFM Heat Pump CFM 100 400CFM Min Max present CFM CFM See Note 2 yn Max 1 2 HP blower CFM CFM at end of 2 stage Heat Max Pump present table pale hes 1 HP blower 1 HP blower Low Heat Pump Airflow CFM lowest stage Other Parameters Min Max DIP SW CFM CFM Continuous Indoor Blower Airflow See Note at end of table an ns 25 1 HP blower Min Max Same as CFM CFM above Min Max CFM CFM Minimum Outdoor Unit Cooling Stage as a percentage of High Cooling Airflow value is rounded up to the closest
21. EDA e Equipment maintenance reminders e Autochangeover mode Permits control of heating cooling humidification and dehumidification without user involvement e All Lennox branded iComfort outdoor units have a outdoor temperature sensor factory installed e Enhance defrost control options for Lennox communicating heat pumps using Intellifrost Adaptive Defrost Control part number 103369 04 or later TABLE OF CONTENTS Overview Technical Description and Features 1 Installation and Setup cece ee eee 3 Adjusting System Settings 3 Identifying System Devices 5 Non Communicating Equipment Adding Outdoor Unit Dehumidifier and Humidifier 5 Adjusting Equipment Parameters 8 Complete iComfort System Adjusting Humidification Settings 24 14 Complete iComfort System Adjusting Dehumidification Settings 16 Partial iComfort System Adjusting Humidification Settings Non Communicating Outdoor Unit 18 Partial iComfort System Adjusting Dehumidification Settings Non Communicating Outdoor Unit Auxiliary Dehumidification Communicating and Non Communicating Outdoor Units 20 Adjusting Zoning Control Settings 21 Using the Tests Diagnostics Features 23 Connecting to a Home Wi Fi Router 24 Troubleshooting Wi Fi Connectio
22. High Normal Cooling Airflow XP25 only 1600 450 to 2150 25 Low Normal Cooling Airflow XP25 only 750 450 to 2150 25 High Normal HP Heating Airflow XP25 only 1600 450 to 2150 25 Low Normal HP Heating Airflow XP25 only 750 450 to 2150 25 Dehum Airflow Adjustment Adder 0 0 to 30 1 50 F to 100 F 10 F Defrost Termination Temp 50 F When Outdoor Control 103369 04 or later is used the follow ing options are available 50F 10C 90F 32C 70F 21C and Max Defrost Automatic Max Defrost parameter only available if using outdoor control 103369 04 or later See page OFF OFF or ON 1 31 for further details Max Defrost by Weather parameter only available if using outdoor control 103369 04 or later See page OFF OFF or ON 1 31 for further details 507343 01 Page 10 Table 5 System Devices gt Air Handler Equipment Name system devices System Heat Pump Air Handler Thermostat Parameter Name To adjust a setting highlight it then press Edit about Air Handler back Air Handler edit next Press edit to change name up to 35 characters may be used Note Pressing the resetALL button will reset all custom parameter settings back to factory default Defaut Parameter Value Setting Increment nnnn CFM See Note at NOTE CFM Default and Values Settings Electric Heating Airflow end of table are dependent on the tonnage of
23. a similar manner as above Gas heat is provided to temper the air during defrost cycles Page 64 G71MPP OR SLP98 FURNACE SETTING ADJUSTMENT If your iComfort Wi Fi thermostat is being used with either a G71MPP or SLP98 furnace and is set to variable capacity mode of operation the iComfort default with these units the thermostat s settings for stage timers are ignored even if shown enabled in the thermostat The stage timer will be used on the cooling side for other cooling units except the XC XP25 where they are not used The furnace software sets and controls the firing rates The only other controlling factor is the stage temperature differentials In Load Tracking Variable Capacity default for these furnaces both stage timers and temperature differentials are ignored Replacement iComfort Controls These kits have been set up for replacement of the iComfort controls Please note that control kits are unit specific Table 19 Replacement Controls iComfort Unit RERIASS O SE Catalog Control Part Number fee rev 02 or later AND CBX32MV rev 06 or 65W70 605341 02 11F64 XP25 ipi par Gal 103686 03 11F64 XC25 ebainpart oniy 103686 03 iComfort Wi Fi Page 65 7 Day Programmable Communicating Thermostat
24. after 3 seconds No heating and 594 I Critical lem DFM mode only Advances from cooling operations De energize interlock relay and re energized 5 minutes later if moderate to critical after ten 10 demand is still present Alarm clears 5 minutes after fault clears minutes Guidoor Unis Compress r has been Load shedding function Provides a method for a local utility company to limit the max 600 Critical d OFF it tilit i5 d sheddi imum power level usage of the outdoor unit The feature is activated by applying 24 volts cyce on uty loadsneaading AC power to the L and C terminals on the outdoor control Low temperature Protection Outdoor unit will not operate when the outdoor temperat ure is at or below 4 F 20 C If the unit is operating and the outdoor temperature drops 601 Critical Outdoor Unit Outdoor unit has been below 4 F 20 C the unit will continue to operate until the room thermostat is satisfied cycled OFF on low temperature protection or the outdoor temperature drops to 15 F 26 C Outdoor unit ambient sensor provides temperature readings Thermostat The temperature sensor 700 Moderate in the thermostat is not working prop Recalibrate thermostat to clear Replace thermostat if needed erly Thermostat The thermostat is reading adi _ 701 Moderate indoor temperatures above the pre pro eg alae Nermostat to clear cool thermostat adjust set point Replace thermo grammed limit i i Thermostat The the
25. air handler from system devices list and press edit From this air handler screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When all CFM settings are complete press the back button Address any red settings as described in steps 6 and 7 Press next step to advance to the tests button Test the system operation and confirm the system is electrically energized and operational Particularly test the heat strips when used to ensure the auxiliary stages operate as designed Press done non communicating equipment to the To adjust a 10 Exit the installer setup mode by selecting the EXIT button TIPS If the thermostat System Setting does not offer a choice for emerg heat and or the electric heat will not function the electric heat has not been configured Configure the electric heat as described on Page 56 or for complete detail see the Air Handler installation instructions Reconfigure the iComfort system by entering the installer program and selecting the setup button and following the prompts High amp low balance points are enabled and adjusted under the installer section of the thermostat In the equipment button select System and press edit Scroll down to Balance Point Control and press edit and select Enabled and then save An outdoor temperature sensor is provided in an iComfort heat pump unit To display the outdoor temperature on
26. and press the save button Follow the red instructions then exit the system If Humidification Control Mode is not offered as a menu item choice the Humidifier must be added to the iComfort system using the Add or Remove Non communicating equipment screen under the thermostat installer program in the setup button The non communicating outdoor unit is part of the system but the thermostat does not display the outdoor unit The outdoor unit was not added as a non communicating unit during initial system setup In the thermostat installer program select the setup button and fol low the on screen instructions until you reach the Add or Remove Non communicating equipment screen press yes Select Outdoor Unit Type from the menu and press the edit button Select 1 Stage AC Unit or 2 Stage AC Unit and press save Follow the red instruc tions then exit the system High Balance Point and Low Bal ance Point are not listed as a menu item to adjust the set point on the thermostat of the heat pump system Balance Point Control must be enabled to display as the High Balance Point and Low Balance Point in the menu and provide the ability for the installer to ad just the set point In the installer program select the equipment button then scroll down to system device to System and press edit Scroll down the menu item choices to Balance Point Control and press edit Select enable and press save High Balance Point and Low B
27. and device alerts C tests Eauipmen press start button only if you w or to re setup an e Q C setup B 9 39 am Aug 15 2012 C setup C tests equipment f alerts D diagnostics configuring the system may effect some devices confirm to continue or press cancel confirm cancel C 9 39 am Aug 15 2012 507343 01 Figure 36 Re Configuration Process Page 28 ADJUSTING EQUIPMENT PARAMETERS AFTER INITIAL INSTALLER SETUP 1 From the Home Screen press and a k hold Lennox see figure 34 until the setup _ C ae equipment warning screen appears Press yes to system devices o adjust a setting continde i hihtight it ten press Furnace 2 Press equipment to change equip hermostat A ie ment parameters and edit details of 2 Stage HP Unit A devices in the system without having to Zoning Control J re run the setup program 3 Select the equipment button to con tinue The system devices screen will System C Low Heating Airflow open Use the arrows to select a device and press edit 9 39 am Aug 15 2012 akk Aror eain Type current value B ow Heatin Irflow 325 4 Use the arrows to highlight a setting and then press edit figure tat an A Low Heating Airflow edit 37A In the example the low heating airflow is changed from the pinow profile c Ran delisss25 O50 TU default 400 to 325 figure 37B A
28. appliance unit guide or in installation instructions If replacing inverter verify inverter model matches size code selected unit size The alarm fault clears after the correct match is detected following a reset Re move the thermostat from the system while applying power and reprogramming 530 Moderate Outdoor Unit Low Damper 24VAC Damper supply voltage is lt 18VAC Critical Voltage e Maintain non zone mode for 5 minutes after alarm clears 532 Moderate Zoning Pressure Switch Opened high Compressor pressure is above the specified limit Compressor is turned off Zoning pressure will be restored once the high pressure switch closes Moderate Invalid temperature reading Open or short sensor detected System is restored 30 542 Critical Zone 1 Temperature Sensor Problem seconds after fault is recovered Moderate Invalid temperature reading Open or short sensor detected System is restored 30 943 Critical Zone 2 Temperature Sensor Problem seconds after fault is recovered Moderate Invalid temperature reading Open or short sensor detected System is restored 30 543 Critical Zone 3 Temperature Sensor Problem seconds after fault is recovered Moderate Invalid temperature reading Open or short sensor detected System is restored 30 545 Critical Zone 4 Temperature Sensor Problem seconds after fault is recovered Equipment Interface Module Pre coil Moderate discharge air temperature sensor prob Interlock relay energized but input not sensed
29. condi tion F If condition 55A or higher is detected outdoor unit will stop compressor and fan Anti 427 Sarat l SA 7 rs has detected a short cycle is initiated If peak current 55A or higher occurs 10 times within an hour Peak tauit condition system will lockout To clear disconnect power to outdoor unit and restart L F If condition is detected outdoor unit will stop compressor and fan Anti short cycle is 428 enai i Fee Unit n eed detected a initiated If condition occurs 10 times within an hour system will lockout To clear discon a gn man Input Uren Conamon nect power to outdoor unit and restart table continued on next page iComfort Wi Fi Page 47 7 Day Programmable Communicating Thermostat Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button Alert Code Priority Alert Text Steps to clear 429 430 431 432 433 434 435 436 437 438 439 Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Critical Moderate Outdoor Unit The inverter has detected a DC link low voltage condition Outdoor Unit Compressor start up failure
30. device AY select it then press edit current value 2 Stage AC Unit Outdoor Unit Capacity Range is 18 to 60 42 please view and save all rad satiings cell Default is 60 kBTU inc 1 gt set to 60 kBTU fw 52 ya C back V iComfort Wi Fi Figure 6 Add Non Communicating Device Outdoor Unit Page 5 7 Day Programmable Communicating Thermostat NON COMMUNICATING EQUIPMENT ADDING A HUMIDIFIER th e The humidifier is wired to the furnace or air handler control as shown on the optional accessories wiring diagram thermostat has detected the system s installed com municating devices and you are at the Add or Re move Non communicating equipment screen system devices Add or Remove Non ar Heat Pump equipment Furnace Thermostat J non communicating device list to add remove adjust a device select it then press edit e The entire system is wired powered up and the 3 7 _ To add or remove a humidifier Before adding a humidifier be sure that 1 Press the yes button on this screen see 1 2 In the non communicating device list screen use the arrows 2a to highlight Humidifier note the current value Not Installed and press edit 2b Touch one of the radio buttons 3a to select humidific ation equipment type Options available are dependent on indoor unit model L 4
31. initial installation if an alert is present when you are making changes to settings no action on the alert is mandatory e Press equipment if you need to set up equipment parameters and edit details of devices in the system e Press diagnostics if you need to run to analyze the system see page 23 will be required Page 3 If any component of the HVAC system has been changed e g replacing an outdoor sensor reconfiguring the system 1 To begin reconfiguring a system after you have accessed the program from the Lennox logo previous page press the setup button 1 figure 36A The Start system configuration screen fig 36B will appear 2 Press start 2 figure 36B to proceed The Re configure confirmation screen fig 36C will appear This reminder notes that system configuration may affect some existing device settings and prompts to confirm or cancel the configuration process 3 Press confirm 3 figure 36C to continue system configuration the screen will change to the system discovery screen At this point the program goes through the same setup as the initial setup process which begins on NOTE Compatible device found screen shown below appears only when a device has been removed and replaced with a compatible device F z ON E setup C tests e ui me lert D quip J i ale 5 J diagnostics O Thermostat A 9 39 am Aug 15 2012 Select Devices system
32. off for 20 sec then back to heat Then initiate a new heat de mand Screen turns blue and the follow ing message appears Thermo stat is unable to establish com 1 munication to the indoor unit or Q other devices Probable cause is a miss wire Please verify all the wiring and connections and restart the system 2 3 4 Outdoor temperature is not dis played on the thermostat 507343 01 Outdoor Temp Display must be enabled to display the outdoor temperature on the home screen Page 50 On the home screen press the right arrow then press the display settings button Click on outdoor temp dis play button to toggle ON table continued on next page A humidifier was added to the system as non communicating equipment and the thermostat does not provide the ability to ad just the RH set point Humidification Control Mode is set for Display only which will not allow the iComfort system to control the humidifier Table 11 Troubleshooting Tips Bold text indicates a button or text display on the thermostat No Issue Problem Possible Cause Corrective Action Comments In the installer program select the equipment button Select Sys tem from the device list using the up down arrows and press the edit button Use up down arrows to select Humidification Con trol Mode from the list Select the desired humidifier control mode Basic Precision or Dew Point Basic is the most popular
33. on links to launch an interactive demo or learn more about iComfort By adding a skin and matching skin image screen saver to your iComfort Wi Fi you can coordinate it with the decor in any room Skins are available in many colors patterns and designs Skins can be ordered from nuvango com Go to Shop gt All Products and scroll down to EVERYTHING ELSE and select LENNOX ICOMFORT After ordering the skin the company will email the image file jpg to you The frame skin will be mailed to you as well The skin image can be uploaded to the iComfort Wi Fi thermostat from the consumer portal site www myicomfort com under the tab skins Screen Saver You can also customize the screen saver by uploading your own photo on www myicomfort com under the tab skins Image must be 800x480 DPI in JPG format HOW DO I TURN ON SCREEN SAVER 1 From the thermostat Home screen press 2 Press the display setting button 3 Press the screen saver button 4 From the pop up menu select either on for the default screen saver or skins for your custom uploaded image The skin picture will appear after 30 seconds of inactivity e When set to off the screen stays on e When set to on after 30 seconds of inactivity the screen will go blank e When set to skins and no skin or custom image has been uploaded the screen will display LENNOX after 30 seconds of inactivity If a skin or custom image has been uploaded after 30 sec
34. sacrificial defrost will be used to ensure there is a clear coil before attempting calibration the thermostat will run 35 F 2 C calibrate auxiliary heat with the HP stopping the auxiliary heat Ee ee when defrost ends y Yes Accumulated compressor run time while outdoor coil temperature sensor input is below 35 F 2 C 30 35 minutes Continue to compressor accumulated accumulate run Demand Defrost un time as occurred time After the initial calibration the heat pump control disables the defrost mode for 30 35 minutes in order to avoid unnecessary defrosts Yes Beyond this timing period both the v ambient and coil sensors are Defrost Mode continuously monitored If the coil Initiate a defrost turn off outdoor fan energize reversing valve and temperature is below 35 F 2 C increase compressor to 100 capacity Monitor coil temperature and the calibration delta is reached sensor input and accumulated defrost time or accumulated compressor run time is more than six 6 hours a defrost is to initiated How did defrost terminate Termination temperature set on outdoor control is 50 F 70 F 90 F Coil temperature sensor input reached the specified defrost termination temperature in less than 14 minutes Termination temperature set on outdoor control is MAX Defrost less than 19 minutes with the outdoor fan ON at low speed for 5 minute
35. screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When you change certain settings the system will prompt you to please view and save all red settings Use the arrows to select the red settings and press edit Either make changes or not but press save either way The red settings will go away after pressing save When all CFM settings are complete press the back button Press next step to advance to the tests button Test the system operation and confirm the heat pump unit is electrically energized and operational Press done 9 Exit the installer setup mode by selecting the EXIT button TIPS High and Low Balance points are enabled and adjusted under the installer section of the thermostat In the equipment button select System and press edit Scroll down to Balance Point Control and press edit and select Enabled and then save An outdoor temperature sensor is provided in an iComfort heat pump unit To display the outdoor temperature on the home screen of the thermostat you must turn on or off the Outdoor Temp Display From the Home screen press press for more area and select the HELP icon Press the user preferences box and scroll down to Outdoor Temp Display Press the modify button and use the up down arrows to select On or Off and then press the save button Press done to return to the Home screen Turn the Indoor humidity display on and off in
36. section Stage 3 failed Same as Code 351 heat section did not energize The air handler will operate on 1st stage elec tric heat until the issue is resolved Air Handler There is a problem with the air handler s 4th stage electric heat Either the pilot relay contacts did not 354 Critical close or the relay coil in the electric Heat section Stage 4 failed Same as Code 351 heat section did not energize The air handler will operate on 1st stage elec tric heat until the issue is resolved Air Handler There is a problem with the air handler s 5th stage electric heat Either the pilot relay contacts did not 355 Critical close or the relay coil in the electric Heat section Stage 5 failed Same as Code 351 heat section did not energize The air handler will operate on 1st stage elec tric heat until the issue is resolved The furnace control board has not received 24 VAC power for 2 minutes or more Dealer cuts the W914 jumper Dehum Harmony III the system will not operate 370 Critical aie The furnace control poarg and produce this code The thermostat monitors the DS terminal in the furnace for minutes or more P power and if the jumper is cut power is lost to DS The alarm will clear when 24VAC is continuously sensed on DS terminal for a min imum of 10 seconds or on a power reset Interlock relay is energized but input is not sensed after 3 seconds There will be 380 Lat Equipment EEO AHC mon oba no heating or cooling
37. set point and the second differential starts at the 0 5 F stage 1 endpoint and extends to second stage differential endpoint NOTE In normal operation the end of the cooling demand is at the set point 0 5 F and the end of the heating demand is at the set point 0 5 F Staged Delay Timers The factory default is set to Enabled When enabled all stage delay timers stages 2 through 6 are enabled and will serve to bring on additional stage s of cooling or heating on a timed basis default 20 minutes in cases when iComfort Wi Fi Page 29 the previous stage of heating or cooling will not raise or lower the room temperature to the set point in a given time When disabled is selected all stage delay timers are disabled This means stages are changed based on the temperature and not their timer delays NOTE The 2nd Stage Delay Timer when Staged Delay Timers is Enabled is used for both HEATING and COOLING However if the system has a variable capacity furnace 2nd Stage Delay Timer will only be used for COOLING not for heating as the variable capacity algorithm ignores delay timers Second through sixth Stage Delay timer where applicable If Staged Delay Timers are enabled the default delay is 20 minutes but can be programmed from 5 to 120 minutes in 5 minute increments If first stage fails to advance the ambient temperature toward the set point by 1 0 F in the programmed delay time then the second stage is acti
38. strength range for the iComfort Wi Fi thermostat is 1 to 69 RSSI The signal strength can be viewed from the thermostat interface Use steps 1 1 Press NETWORK SETTINGS this screen shows a graphical view of buttons representing Wi Fi options OPEN and SECURE wireless networks and a button for adding a network 7 Day Programmable Communicating Thermostat 2 Select the access point that has already been establish and connected too There are two options to select from which are connect and AP info Select AP Info and verify the RSSI strength If the signal i is anywhere between 1 to 69 then the signal strength is sufficient If outside this range the either locate the router closer to the thermostat or add a repeater ACCESS POINT INFO Detailed information for the access point MAC WSTATE CONN BSSID 68 RSSI 46 IP addr Figure 31 Verifying Signal Strength REGISTRATION FOR ONLINE ACCESS 1 From the WI FI SETTINGS screen press either the thermostat not registered icon or the connection status icon and select the server icon AP3 connected press to toggle off auto WI FI SETTINGS ES n ES press to change network settings ES Fi ES press to enable toch disable Wi Fi k thermostat registration server router internet 2 Enter homeowner email address and system description and press the register button Register with iComfort Wi Fi th
39. the home screen of the thermostat you must turn on or off the Outdoor Temp Display From the Home screen press press for more area and select the HELP icon Press the user preferences box and scroll down to Outdoor Temp Display Press the modify button and use the up down arrows to select On or Off and then press the save button Press done to return to the Home screen Page 60 Partial iComfort System iComfort Furnace and Non Communicating Lennox Brand conventional Air Conditioner An iComfort as furnace G71MPP EL296V SLP98 SL280 6 with a conventional non communicating Lennox brand air conditioner 1 Wiring See Communicating System and optional accessories Wiring diagrams 7 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the gas furnace R i i C e Conventional thermostat wire with 2 to 4 conductors from the furnace terminal strip to the air conditioner unit Y1 C amp on some models R amp Y2 e Wiring as required for accessories 2 Cut option link 2 stage compr Y1 to Y2 W915 on furnace control on two stage Lennox brand conventional air conditioner units only 3 After the entire system is wired power up the system the iComfort Wi Fi thermostat will check the system for 8 installed communication devices 4 In the installer setup button select Add or Remove non communicating equipment by using the yes button 5 Select the Outdoor Unit Type from
40. the device list using the 9 up down arrows and press the edit button Then select the air conditioner type 1 stage AC or 2 stage AC and press the save button 10 TIPS Select the outdoor unit capacity and minimum outdoor unit capacity 2 stage only Press save after editing each setting Press back when finished to return to the adjust screen Use the arrows to select Furnace from system devices list press edit From this Furnace screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When you change certain settings the system will prompt you to please view and save all red settings Use the arrows to select the red settings and press edit Either make changes or not but press save either way The red settings will go away after pressing save When all CFM settings are complete press the back button Press next step to advance to the tests button Using up down arrows select the test options individually if so desired you may choose to TEST ALL and press the select button If selecting individual tests repeat until you have selected all you intend to run Press the start button Confirm the air conditioner unit is electrically energized and operational Press done Exit the installer setup mode by selecting the EXIT button If the thermostat System Setting only shows heat only or off choices and does not offer a choic
41. the unit SCFM f nnnn CFM See Note at NOTE CFM Default and Values Settings High Cooling Airflow end of table are dependent on the tonnage of the unit nce 1 No Delays 2 ON No delays OFF 45 sec delay Airflow Profile Cooling 1 3 ON 82 7 5min OFF No delays 4 ON 50 30s 82 7 5min OFF 50 30s nnnn CFM See Note at NOTE CFM Default and Values Settings Gontinyous Indoor Hane ranoy end of table are dependent on the tonnage of the unit ee Heating Indoor Blower OFF Delay 10 sec 0 to 10 Seconds 1 sec Heating Indoor Blower ON Delay 0 sec 0 to 5 Seconds 1 sec Cooling Indoor Blower OFF Delay 0 sec 0 to 30 Seconds 2 sec 2 sec 0 to 10 Seconds 1 sec Cooling Indoor Blower ON Delay Note All communicating Installer Parameters default CFM values based on DIP switch setting non communicating value are calculated using the CFM conversion tables and rounded up to closest number on 25 CFM resolution iComfort Wi Fi Page 11 7 Day Programmable Communicating Thermostat Table 6 System Devices gt Furnace system devices System To adjust a setting about Heat Pump highlight it then press Edit resetall Furnace i edit back 8 d next J Parameter Name Default in Dependency Note or Options Thermostat Press edit to change name up to 35 characters may be used Note Pressing the resetALL button will reset all custom parameter settings back to factory defau
42. to Single wire to terminal C Z Unused wires terminal C Unused wires BEST PRACTICES Keep all communication wiring as far away from house electrical wiring and large electrical appli ances as possible 15 5m recommended Maximum total length of all connections on the RSBus is limited to 1500 ft 450 m Max length between components is 300 ft 90 m Figure 18 Thermostat Wire Termination in Communicating System Communicating thermostat require four thermostat wires between the thermostat and the furnace air handler control and four wires between the outdoor unit and the furnace air handler control When a thermostat cable with more than four wires is used the extra wires must be properly connected to avoid electrical noise The wires must not be left disconnected Use wire nuts to bundle the unused wires at each end of the cable A single wire should then be connected to the indoor unit end of the wire bundle and attached to the C terminals as shown in the diagram above This is not an issue in non communicating systems Configuring Heat Sections on Air Handler Control IMPORTANT After electric heat strips are installed the Air Handler Control must be manually configured to detect the number of electric heat sections See also 506181 01 for complete configuration guide This procedure is applicable only to the CBX3
43. 1 In the system devices list use the arrows 1a to highlight System Press edit 1b 2 Humiditrol only in the System list use the ar rows 2a to highlight Humiditrol Comfort Adjust The current value defaults to Maximum Overcooling Press edit 2b 3 Humiditrol only Touch one of the radio buttons 3a to select the overcooling level press save 3b After saving check that the current value now shows the new selection 4 Use arrows 4a to highlight Min De humidification Setpoint press edit 4b Note the current value e g 45 5 Use arrows 5a to make changes press save 5b After saving check that the current value now shows the new selection 6 Press the back button to return to Adjust a setting screen Minimum Overcooling save cal m l Humiditrol Comfort Adjust settings are only available on units equipped with ja Humiditrol De humidification device System Staged Delay Timers 2nd Stage Delay 3rd Stage Delay 4th Stage Delay Lock In 2nd Stage HP by Outdoor Temp Balance Point Control Humiditrol Comfort Adjust OD Humid Boundary Outdoor Temperature Reading Calibr 45 A 42 v 9 39 am Aug 15 2012 De humidification Control Mode current value reset d returns to adjust a a save J cancel Min De humidification Setpoint Range is 40 to 60 Defa
44. 2MV XX 230 6 06 and higher and CBX40UHV all models To configure the heat strips so that they will be detected by the thermostat e Power must be applied to the air handler but NOT to the thermostat Remove thermostat from base plate or remove wires to thermostat at the air handler e On the air handler control unit should be in idle mode decimal blinks at 1 Hertz 0 5 second ON 0 5 second OFF 507343 01 systems using the iComfort Wi Fi Page 56 Select field test mode press and hold the push button until solid appears release button Display will blink Press the push button and wait for the display LED to show H capital H then release the button The air handler control cycles the indoor blower motor on to the selected heat speed and stages the electric heat relays on and off to automatically detect the number of electric heat sections The air handler control stores the number of electric heat sections then automatically exits Field Test Mode At this point the iComfort Wi Fi will now detect the heat strip information stored in the air handler control HUMIDITROL Cc DH of iON SMART AUTO EVENHEAT FUSE 3AMP BLOWER ADJUST ONLY CFM L2 L1 Toli INDOOR BLOWER EARTH POWER INDOOR BLOWER E029 oboa lelololo NI OUTL IOR UNIT RJl I C er omma T IERMOSTAT oe S PUSHBUTTON LED Typic
45. An iComfort air handler CBX32MV or CBX40UHV witha 6 conventional non communicating Lennox brand heat pump unit IMPORTANT Be sure to set up the air handler control for heat 7 strips if used prior to powering up the system and thermostat 1 Configure air handler control AHC for auxiliary heat strips if used 2 Wiring See Communicating System and optional 8 accessories Wiring diagrams 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the air handler R i i C e Conventional thermostat wire with 5 to 6 conductors 9 from iComfort air handler to conventional HP 5 8 wires Y1 C R W1 O and on some models Y2 e Wiring as required for accessories 3 On air handler control e When matched with conventional Lennox brand 10 2 stage heat pump cut the Y1 Y2 2 stage comp on board clippable link e Remove jumper between W1 and W2 for two stage electric heat only e Cut on board R O clippable link 4 After the entire system is wired power up the system the 11 iComfort Wi Fi thermostat will check the system for installed communication devices 5 In the installer setup button select Add or Remove non communicating equipment by using the yes button 12 TIPS Select the Outdoor Unit Type from the device list using the up down arrows and press the edit button Then select the heat pump type 1 stage HP or 2 stage HP and press the save button On the thermostat go past the Add or remo
46. F 15 F Gas Heat Control Mode Staged Staged yr Capacity Load Tracking ariable Capacity Number of Gas Heating Stages SLP98V only staged selection 4 1 2 30r4 Modulating Gas Heating Steady State PI SLP98V only Standard Less Aggressive More Aggressive Standard Modulating Gas Heat Step Change PI SLP98V only Standard Less Aggressive More Aggressive Standard Modulating HP Heating Cycles Per Hour XP25 only 4 0 3 0 to 6 0 0 5 Modulating HP Electric Heating Switching Point XP25 only 1 0 0 0 to 2 0 0 25 Modulating HP Heating Steady State PI Gain XP25 only Standard Less Aggressive More Aggressive Standard Modulating HP Heating Step Change PI Gain XP25 only Standard Less Aggressive More Aggressive Standard Modulating Cooling Steady State PI Gain XC25 and XP25 only oe Less Aggressive More Aggressive Standard Modulating Cooling Step Change PI Gain XC25 and XP25 only hae Less Aggressive More Aggressive Standard Modulating Cooling Cycles Per Hour XC25 and XP25 only 4 0 3 0 to 6 0 0 5 Page 8 507343 01 Parameter Name Default Parameter Value Setting Increment Auto Changeover Temp Dead band 5 F 3 to 9 F 1 F Max Heat Set point 90 F 40 to 90 F 1 F Min Cool Set point 60 F 60 to 99 F 1 F Heat Cool Stages Lock In 60 F 60 to 99 F 1 F Balance Point Control Disabled Disabled or Enabled N Hum
47. Firing rate increased by 5 every 5 minutes up to 100 firing rate Differential less than 4th stage differential 2 Increase firing rate to calculated 3rd stage firing rate Differential less than 4th stage differential 7 NO 2 Firing rate increased by 5 every 5 minutes up to 100 firing rate Figure 43 Variable Capacity Operation Flow Chart Increase firing rate to 100 until thermostat demand is satisfied Table 9 Variable Capacity Furnace Operation Thermostat Demands None Operation Furnace is off First level heat demand 1 Furnace BTU rate is calculated by the iComfort in tegrating algorithm 2 Furnace firing rate will continue at current heating rate until first stage demand is satisfied or an addi tional thermostat demand is received Second level heat demand added 1 Thermostat will immediately increase variable capa city furnace firing rate to the calculated BTU percent age representing the second stage thermostat de mand 2 Furnace firing rate will increase by 5 every 5 minutes up to 100 if second stage thermostat is not satisfied If thermostat second stage demand is satisfied the current firing rate will continue until all thermostat demands are satisfied Third level heat demand added Thermostat will immediately increase variable capa city furnace firing rate to the calculated BTU percent age representing the third stage thermostat demand
48. In 2nd Stage HP by Outdoor Temp Balance Point Control Humiditrol Comfort Adjust OD Humid Boundary Outdoor Temperature Reading Calibr A a l Humiditrol Comfort Adjust set tings are only available on units equipped with a Humiditrol De humidification device J 9 39 am Aug 15 2012 De humidification Control Mode current value 45 Min De humidification Setpoint Range is 40 to 60 Default is 45 inc 1 set to 8 42 back p bk A returns to adjust a setting screen Figure 16 Adjust a Non Communicating Device Setting Dehumidification FEATURE SCREEN DEHUMIDIFICATION SETTINGS 1 From the main screen press the right arrow icon to go system SETTINGS Mp the the Features screen bui ae 2 From the Features screen select system settings de a fier 3 Touch the button of the dehumidification settings you esr 40 ogm hauler ale want to adjust if it says dehumidifier OFF one touch will HIGH 591 display a selection for OFF MEDIUM or HIGH rz 4 Selecting MEDIUM or HIGH will bring on the set to but aoa fon THIS SCREEN ARE IN current indoor humidity is 50 LSTANTLY SAVED 5 When you touch the set to button the arrows appear al rr lowing you to change to the desired dehumidifier per i ce centage setting Figure 17 Dehumidification Settings Controls iComfort Wi Fi Page 19 7 Day Prog
49. Inspect switch is stuck closed vent and combustion air inducer for correct operation and restriction The alarm fault clears after the issue is corrected Check pressure inches w c of high pressure switch closing during a heat call 225 Critical Furnace The furnace high pressure Measure operating pressure inches w c Inspect vent and combustion air inducer switch is failing to close for correct operation and restriction The alarm fault clears after the issue is correc ted Check operation of high pressure switch closing during a heat call Measure operat 226 Critical Edrnace pee high pressure ing pressure inches w c Inspect vent and combustion air inducer for correct op eration and restriction The alarm fault clears after the issue is corrected Check pressure inches w c of low pressure switch closing during a heat call 227 Moderate Furnace The furnace low pressure Measure operating pressure inches w c Inspect vent and combustion air inducer switch is open in run mode for correct operation and restriction The alarm fault clears after the issue is correc ted Unable to perform pressure switch calibration Check vent system and pressure 228 Moderate Fumace The fumace conte LIS ol switch wiring connections Check the drain trap for blockage The alarm fault clears P 7 after a successful calibration Furnace The furnace control has 229 Minor switched to high fire ignition because IFC switched to high fire ignition beca
50. K status enabled SETTINGS Press to see press to enable press to change connection status disable Wi FI network settings Must setup a network connection before registering thermostat WiFi 9 39 am Aug 15 2012 I Figure 27 Enable Wi FI e Open connection which which requires no password It is highly recommend that only a secure connection is used e Secure connection which requires Wi Fi password security key Add a network is required when Wi Fi identification SSID is being hidden not broadcasting You will need to know the Wi Fi network name SSID security encryption type if enabled and security password if security encryption is enabled 2 When selecting a e unsecured connection a screen will appear with two options connect and router info Press connect to continue secured connection a screen will appear requesting the Wi Fi network password security key There are two options to select from which are connect and router info Using the on screen keyboard enter the password security key and then press connect to continue Zone 1 D LENNOX Open connection no password required It is highly recommend that only a secure con nection is used Secure connection password required lock icon is present Signal strength For best results the higher the bar levels the more reli able a connection Figure 28 Typical Connection Type and Signal Strength NOTE The router
51. LENNOX 2014 Lennox Industries Inc Dallas Texas USA fA onori iComfort Wi Fi Web and Mobile Apps iComfort Wi Fi Thermostat NOTICE Read this manual before programming this thermostat Use this thermostat only as described in this manual iComfort Units Outdoor Units XC17 02 or later XP17 02 or later XP17N 01 or later XP19 06 or later XC21 05 or later XP21 01 or later XP21N 01 or later XP25 01 or later XC25 01 or later Shipping and Packing List 1 Indoor Unit G71MPP 03 or later SLP98 01 or later SL280 03 or later EL296V 01 or later CBX40UHV 02 or later CBX32MV 06 or later iComfort Wi Fi thermostat firmware version 2 13 4 Mounting screws 4 Wall anchors 1 Installation quick start guide 1 Installer s system setup guide 1 Homeowner s manual 1 Warranty card AWARNING Improper installation adjustment alteration service or maintenance can cause property damage personal injury or loss of life Installation and service must be performed by a licensed professional HVAC installer or equivalent or service agency INSTALLER S SYSTEM SETUP GUIDE iComfort Wi Fi Thermostat Touch Screen Programmable Communicating Thermostat CONTROLS qe Publications Fay ih Litho U S A Supersedes 7 2014 Overview Technical Description and Features This 24VAC thermostat is an electronic communicating color display touchscreen and 7 day programmable thermost
52. NG THERMOSTAT RSBus length of all connec tions on the RSBus is limited to 1500ft Wire gauge of RSBus wire is 18 GREEN WHITE YELLOW RED Q Maximum total Sli Oli 9S OUTDOOR UNIT iComfort i Wi Fi i thermostat R HRV3 OR ERV3 HRV2 OR ERV2 T10 N C PURPLE 1 T11 COM 4H Qs oH NOTE 24V UV LIGHT ROLF RED eS T2 No S Of UN INDOOR UNIT GREEN WHITE YELLOW iComfort outdoor unit APPLICATIONS In an iComfort by Lennox system neither furnace nor air handler transformer will have adequate VA to power ae a R 24V UV light applications ara An additional transformer for UV light applications is re quired UV light wiring con nections are independent of OTHER 120VAC EAC OUTPUT IS HUMIDIFIER HVAC system operation see L1 UV light installation instruc n ZOVACAIR ENERGIZED ANYTIME tions CLEANER BLOWER IS RUNNING BLACK QYSYSGV INNSO DOZAICOO OUTDOOR UNIT HUMIDITROL EDA L1 120VAC N HUMIDIFIER S Lt 120vac__ 120VAC HUM OUTPUT IS y HUMIDIFIER ENERGIZED ANYTIME HUMIDITY DEMAND IS PRESENT 120VAC TERMINALS EAC HUM FURNACE ONLY
53. Non communicating Heat PUMP oorr erii orra eho rE rE oe ot aes 63 iComfort Equipment Interface Module 64 Replacement iComfort Controls 65 A CAUTION This is a 24VAC Class 2 thermostat Do not install on voltages higher than 30VAC Do not switch system to cool if the outdoor temperature is below 45 F 7 C This can damage the cooling system A CAUTION Electric shock hazard Always turn off power at the main power source by switching the circuit breaker to the OFF position before installing or re moving this thermostat All wiring must conform to local and national building and electrical codes and ordinances IMPORTANT Connections to non communicating outdoor units and accessories are described in the Quick Start Installation guide Wiring diagrams are also provided beginning on page 53 of this manual Page 2 Installation and Setup During initial thermostat start up the following screen will appear see figure 1 This indicates that the thermostat is active and booting up Figure 1 Boot Up Screen COMMUNICATION ERROR SCREEN During initial thermostat start up if the following screen appears see figure 2 this will indicate that the thermostat has been incorrectly wired or has shorted wires Turn power off to the system and verify that all wiring is correct Figure 2 Communication Error Screen Adjusting System Setting SET TIME AND DATE Use the arrows to selec
54. RH above set point and e outdoor temp below 95 F indoor temp above 65 F and e for HUMIDITROL adjust Humiditrol comfort parameters as follows e MAX adj Indoor temp gt 2 F above heating set point MID adj Indoor temp gt HEAT setpoint COOL setpoint 2 e MIN adj Indoor temp gt 2 F below cooling set point Figure 18 Humidifier Controls Non Communicating Outdoor Unit Auxiliary Dehumidification Communicating and Non Communicating Outdoor Units System must be in cooling mode and have a call for dehumidification from the iComfort thermostat This will Auxiliary dehumidification is controlled by iComfort start the auxiliary dehumidifier thermostat with or without zoning A separate wire from auxiliary dehumidifier will need to be run to G terminal on indoor unit control to start the blower Needs a dehumidification demand from the stand alone de humidification thermostat and a separate wire run to G ter minal on indoor unit to start the blower Auxiliary dehumidification is controlled by dehumidification control with or without zoning 507343 01 Page 20 Zoning Control Settings iHarmony Zoning System NOTE Skip if no zoning control device is installed HEAT COOL CHANGEOVER The following is an example of how the system operates during a heating cooling changeover When the system is satisfying a call from zone 1 for heating and receives a call for cooling from zone 2
55. Rarer Vas Raber ve 3000 Filter 1 3002 Humidifier 3004 Maintenance 4000 User Wi Fi state change 4002 Image file download Pad disable failed 3001 Filter 2 3003 UV Light 3005 PureAir Mainten 4001 Firmware download failed O ca ance Table 11 Troubleshooting Tips Issue Problem Possible Cause Corrective Action Comments Stuck splash screen due to incorrect wiring will occur on thermo stats with firmware version 2 00 or 2 02 Thermostat did not find an Indoor Unit Make sure there is an iComfor indoor unit on the system Check R i i and C connec tions ohm wires and cycle power Replace indoor unit control board if there is no response Bold text indicates a button or text display on the thermostat When the thermostat is first started and is stuck on the splash screen Stuck splash screen due to incorrect wiring will occur on thermo stats with firmware version 2 01 Thermostat did not find an Indoor Unit Make sure there is an iComfor indoor unit on the system Check R i i and C connec tions ohm wires and cycle power Replace indoor unit control board if there is no response When the thermostat is first started and is stuck on a blank screen Thermostatis possibility incor rectly wired and cannot find an iComfor indoor unit Blue screen with notification text that could be due to incorrect wiring will occur on thermostats with firmware version 2 10 Thermostat did not find an Indoor Unit
56. The previous screen returns but the current value now shows your selection 4a Press the back 4b button 5 The Add or Remove screen reappears with your addition shown in the system devices list 5a At this point you may add more equipment press yes or if finished press the next 5b button to advance to the Adjust a setting screen see page 18 pack J e t _ NOTE Adding humidity regulating non communicating de vices may be a 2 step procedure 1st the device must be installed and wired After the hu midifier is installed the setting under the System mode Humidification Control Mode defaults to Basic 2nd if you want another mode i e Precision Basic Dew Point or Precision Dew Point the device requires further configuration see page 18 Dehumidifier current value Electronic Air Cleaner 2a Nok keiid Humidifier Select one Not Installed 3a Humidification Options available for EL296 and 10a SL280 non communicating device list to add remove adjust a device A select it then press edit Dehumidifier current value Electronic Air Cleaner 2a Not Installed _ Select one Humidifier Not Installed 3a Bypass 24VAC Humidifier Power 120VAC Humidifier Bypass and Power Humidifier Options available for SLP98 non communicating device list to add remove adjust a device a a select i
57. a C o D 1 13 pm 2 Occurrences First Occurrence 10 25 2011 12 01 pm 9 39 am Aug 15 2012 Figure 44 Selecting and Viewing Alerts VIEW AND CLEAR INSTALLER ALERTS NOTE Service alerts remind users to service filters humidifier pad UV light and PureAir Air Purification system and are not shown in the installer s menu From the user s home screen press and hold the Lennox logo in the bottom right corner of the thermostat to access the installer program Press yes when asked if you want to proceed The installer screen opens at the system and device alerts screen figure 44A The left side of the system and device alerts screen shows a list of each communicating device discovered in the system and check boxes for selecting each device Or you may use buttons to the right of the System Devices list to select all or deselect all After something has been selected use view active to list all active alerts for selected devices If there are no alerts the display will show There are no new alerts that require service If there are alerts these are stored for recall but only one alert will appear in the box at a time see figure 44B Use the next button to advance through all the alerts If only one alert is present the next button will not appear 507343 01 Alerts may pop up on the screen during setup Details of all active alerts can only be accessed through the installer s scree
58. age compressor Cycle indoor power off and back on alert code 401 will clear within a few minutes No weather being displayed iComfort Wi Fi not communic ating with router Make sure Wi Fi is enabled Unable to complete Wi Fi router Internet connection 507343 01 Refer to 507037 01 Wi Fi Troubleshooting checklist for iComfort Wi F thermostat Page 52 Wiring Diagrams iComfort by Lennox FURNACE IFC OR AIR HANDLER AHC OPTIONAL DIS CHARGE AIR SENSOR SEE DAS NOTRE Y DAS NOTE The discharge air sensor is intended to be mounted downstream of the furnace heat exchanger and air conditioning coil It must be placed in free airflow where other accessories such as humidifiers UV lights etc will not interfere with its accur acy Wiring distance between the IFC or AHC and the discharge air sensor should not exceed 10ft when wired with 18 gauge thermostat wire OAS NOTE Wiring distance between the IFC or AHC and the outdoor temperature sensor should not exceed 200ft when wired with 18 gauge thermostat wire OPTIONAL OUT DOOR AIR SENSOR SEE OAS NOTE CX OUTDOOR DISCHARGE AIR SENSOR AIR SENSOR iComfort Wi Fi THERMOSTAT GREEN WHITE YELLOW RED iComfort by Lennox OUTDOOR AIR CON DITIONING OR HEAT PUMP UNIT THERMOSTAT RSBus GREEN WHITE YELLOW RED C j i R HP AC iComfort Wi Fi
59. al Systems Setup Complete iComfort Systems Furnace and Air Conditioner An iComfort gas furnace G71MPP EL296V SLP98 SL280 5 with an iComfort air conditioner XC17 XC21 or XC25 only unit 1 Wiring See Communicating System and optional accessories Wiring diagrams e 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the gas furnace R i i C e 4 conductor thermostat wire from the integrated furnace control IFC terminal strip to the iComfort air conditioner unit R i i C e Wiring as required for accessories 2 DO NOT cut any option link on air handler control 6 3 After the entire system is wired power up the system the iComfort Wi Fi thermostat will check the system for installed communication devices 4 On the thermostat go past the Add or remove non communicating devices to the To adjust a setting screen 8 TIPS 7 Use the arrows to select Furnace from system devices list press edit From this furnace screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When you change certain settings the system will prompt you to please view and save all red settings Use the arrows to select the red settings and press edit Either make changes or not but press save either way The red settings will go away after pressing save When all CFM settings are complete press the back button Press next
60. alance Point are now listed adjust the balance point settings and press save If Balance Point Control is not shown as a menu item choice the system does not have recognize an outdoor sensor or the system is not a heat pump iComfor thermostat does not show a choice for Dew Point Control Humidification mode only Basic and Precision choices Dew Point Control will only be displayed if the system has an outdoor sensor Add an outdoor sensor to the system and connect to the outdoor sensor terminals on the indoor unit iComfort system is not able to read the outdoor temperature sensor in the iComfort outdoor unit check outdoor sensor The iComfort does not display an alert code message but the furnace or unit control displays a diagnostic code The red Critical Alert icon and homeowner alert button do not display non critical alerts Go to the installer program alert button to view all alerts and details about those alerts The iComfort thermostat does not display the Model and or Serial indoor or outdoor unit The iComfort control was re placed with a replacement con trol before the iComfort sys tem was initially setup or con figured Replacement iComfort controls do not have the Model or Serial loaded in the control The Model and Serial cannot be added to the control System will still operate normally A non communicating 2 stage outdoor unit was added
61. and Low Balance Points It is not necessary to change the 1 Wiring See Communicating System and optional defaults but you must save each setting The red settings 507343 01 accessories Wiring diagrams e 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the gas furnace R i i C e 4 conductor thermostat wire from the furnace terminal strip to the iComfort heat pump R i i C e Wiring as required for accessories 2 DO NOT cut any option link on furnace control 3 After the entire system is wired power up the system the iComfort Wi Fi thermostat will check the system for installed communication devices On the thermostat go past the Add or remove non communicating devices to the To adjust a setting screen Select System from the device list using the up down arrows and press the edit button Select Balance Point Control and press edit Use the 8 9 TIPS High and Low Balance points are enabled and adjusted under the installer section of the thermostat In the equipment button select System and press edit Scroll down to Balance Point Control and press edit and select Enabled and then save will go away after pressing save Press the back button to return to the adjust screen Use the arrows to select Furnace from system devices list press edit From this furnace screen you will have access to the various airflow settings Set the system air volum
62. and Wi Fi finder application to locate and determine signal strength NOTE Thermostat will not be able to reliably connect to a router if the received signal strength indicator RSSI is 70 or greater ENABLING WI FI To enable the Wi Fi feature to communicate with a wireless router 1 Press and release Wi Fi in the lower left corner of the HOME screen outdoor temperature enter away indoor temperature 7 indoor humidity is 41 set temp a 2 heat cr k See 1 Nake system is cooling Wi Fi 9 39 am Aug 15 2012 K Zone 1 Q LENNOX Figure 25 Press Wi FI 2 Press the Wi Fi disable button to enable Wi FI WI FIL SETTINGS Thermostat is not connected to the Wi FI network WI FI disabled Press to enable disable Wi FI 2 LENNOX Wi Fi 9 39 am Aug 15 2012 Zone 1 Figure 26 Enable Wi FI 3 The User Agreement screens will appear next Press next as many times as necessary then press accept after reading the User Agreement ESTABLISHING A WI FI CONNECTIONS There are two methods to setup your Wi Fi connection Select either NETWORK SETTINGS or connection status 507343 01 Method 1 Network Settings Method 1 Press NETWORK SETTINGS this screen shows a graphical view of buttons representing OPEN and SECURE Wi Fi networks and a button for adding a network WI FI SETTINGS Thermostat is notyconnected to the Wi FI network connection WI FI NETWOR
63. ange the humidi fication set point based e on the outdoor temperature e user defined Dew Point Adjustment setting Precision Dew Point Control adjustment mode will operate when these conditions are met e humidification mode has been enabled e humidification demand exists 24V present at H e the unit is in HEAT mode Figure 11 Complete iComfort Feature Settings Screen Humidification Setting iComfort Wi Fi Page 15 7 Day Programmable Communicating Thermostat Complete iComfort System Adjusting Dehumidification Settings SYSTEM DEVICES SCREEN DEHUMIDIFICATION SETTINGS Pre adjustment REQUIREMENTS 1st the device has been installed 2nd from the Add or Remove Non communicating equipment press next 3rd in the Adjust a setting screen configure the device as follows system devices To adjust a setting highlight it then press Edit ma amp Keel E Air Conditioner Furnace System Thermostat Humiditrol edit System De humidification Control Mode 3rd Stage Delay 4th Stage Delay Lock In 2nd Stage HP by Outdoor Temp Balance Point Control Humiditrol Comfort Adjust Min De humidification Setpoint current value Midpoint Overcooling gt 2 2b edit Humiditrol Comfort Adjust Select one Maximum Overcooling Midpoint Overcooling
64. ariable capacity furnace operation SLP98 variable capacity furnaces BTUs firing rates can be incremented by as little as 1 35 to 100 range available as the thermostat may dictate The thermostat monitors room temperature previous heat cycle times and target set point to Page 38 determine the starting firing rate and any required firing rate increases or decreases during the thermostat demand During a heat demand the iComfort thermostat monitors the differential between set point and room temp As this differential increases and reaches field adjustable levels stages the thermostat will increase firing rate accordingly to maintain room temperature and ultimately satisfy the heat demand On the next heat cycle the iComfort stat will calculate a new starting firing rate in 1 increments with the goal of maintaining room temperature at or near thermostat set point with a minimum of system cycling The principles of operation are described in figure 43 and table 9 STAGED OPERATION Some furnaces can be configured to provide up to four stages of gas heat operation When staged heating is chosen the iComfort thermostat allows you to choose between 1 2 3 and 4 stages of heat e Single stage heat First stage provides 100 of full capacity Two stage heat First stage provides 70 of full capacity 2nd stage provides 100 of full capacity e Three stage heat First stage provides 60 of full capacity 2nd stage p
65. as installed and shown in the About screen The alarm fault will clear upon configuration or sensing normal values ae Correct the cause of roll out trip Reset roll out switch Reset power to clear Test 200 Critical on sg The furnace roll out limit the furnace operation The alarm fault clears after the furnace roll out switch is witch is open closed Lost communication with indoor blower motor Possible causes include power out 201 Critical Eurmace iir Mander iTne eo age brown out motor not powered loose wiring condensation on air handler con air handler indoor blower motor trol without cover on breaker Problem may be on control or motor side Cleared 7 after communication is restored Furnace Air Handler The unit size Incorrect appliance unit size code selected Check for proper configuring under Unit 202 Critical code for the furnace or air handler Size Codes for Furnace Air Handler on configuration guide or in installation instruc and the size of blower motor do not tions The alarm fault clears after the correct match is detected following a reset match Remove the thermostat from the system while applying power and reprogramming No appliance unit size code selected Check for proper configuring under Unit Size Furnace Air Handler The unit size Codes for Furnace Air Handler on configuration guide or in installation instructions 203 Critical code for the furnace or air handler has Critical Alert The alarm fault
66. ased to 90 F If Defrost Termination Temperature setting is set to MAX the system will always run at MAX when accumulated compressor OFF time is longer than 30 minutes and ambient temperature is less than 35 F When the ambient sensor temperature is higher than 40 F and Defrost Termination Temperature setting is set to MAX defrost termination will be 90 F If Defrost Termination Temperature setting is 50 F 70 F or 90 F defrost termination will follow the Defrost Termination Temperature setting 7 Day Programmable Communicating Thermostat Defrost termination is set at MAX OFF time gt 30 minutes when ambient temperature lt 35 F See Note Next defrost cycle should run MAX regardless of the heating time between defrost Next defrost cycle should run MAX NOTE Testing indicated that the highest potential for a weather event to prevent fan operation due to ice build up on the fan blade and orifice ring is when the outdoor ambient is below 35 F and the unit is OFF for more than 30 minutes Last heating time between defrost lt 50 minutes Last two heating time between defrost gt 1 hr Next defrost cycle should run 90 F Next defrost cycle should run the same termination as previous defrost cycle termination Figure 39 Automatic Max Defrost Rule MAX DEFROST BY WEATHER Factory default f
67. at This thermostat stores system parameters and settings in non volatile memory i e retains data when electrical power fails or is turned off This thermostat can also connect to online services via the Internet through the homeowner s Wi Fi router After online registration is completed the system may then be accessed by the homeowner from anywhere using a remote Internet connection via computer or personal communicating device The thermostat also supports e Wireless bands 802 11b 802 11c and 802 11n e Three languages are supported English Fran ais and Espa ol e Air conditioning or heat pump units with up to four stages of heat two stages of compressor operation 2 stages of heat pump heating 2 stages of auxiliary back up heating 2 stages of emergency heating e Variable capacity multiple stage heat cool universal compatibility gas electric heat pump air conditioner e Dual fuel capable iComfort heat pump only with two balance points e Indoor air quality with time based notification of consumables including media filters UVC bulbs humidifier pads and PureAir system catalyst service replacement iHarmony zoning system 2 4 zones Lennox iComfort Equipment Interface Module Catalog number 10750 provides iComfort Wi FI to non communicating indoor unit e Humidification measurement and control e Dew point adjustment control e Humiditrol Enhanced Dehumidification Accessory
68. back button to return to Adjust a setting Precision Dew Point ia screen L NOTE If the defaults for the settings shown in red you are not required to make any changes but you must go into the edit tool a 3b Grea and press save 5b When all red text is gone the back button lt will appear press it to return to the Adjust a setting screen Basic Dew Point Control adjustment mode will change the humidi fication set point based on the outdoor temperature e user defined Dew Point Adjustment setting e user defined Auto Changeover Humidif Deadband setting e user defined Max Humidification Setpoint setting Precision Dew Point Control adjustment mode will operate when these conditions are met humidification mode has been enabled e humidification demand exists 24V present at H e the unit is in HEAT mode user defined Dew Point Adjustment setting user defined Auto Changeover Humidif Deadband setting user defined Max Humidification Setpoint setting NOTE In dew point adjustment mode the humidification setpoint has no effect whatsoev er on unit operation Only the user defined dew point adjustment setting affects operation per the following formula Outdoor Temp F RHuser dew point 2 adjustment Where RHyser dew point adjustment cannot exceed 15 and RHsetpoint minimum is 15 and cannot exceed 45 FHsetpoint Fi
69. board input screen Dealer Number SES Dealer Name Lennox Dealer Address 1 800 9 LENNOX Dealer Email Dealer Phone Dealer Website www lennox com Note When adding the dealer number all other dealer fields will auto populate keyboard input screen Z once thermostat registration is completed 507343 01 Page 4 Identifying System Devices From the system devices screen use arrow buttons to scroll to a device then press the about button Use the up down arrows to scroll through and view additional information about the selected device When finished viewing press the back button device feature list system devices System Heat Pump Furnace Thermostat 9 39 am Aug 15 2012 press about for Language Support more infotmuation o about a ANEMIE Unit Model Number a highlighted device Unit Serial Number Unit Nominal Capacity Number of Heating Stages Heating Capacity by Stage Indoor Blower CFM Range device description Furnace Equipment Type Name Furnace returns to system devices screen back fi Control Software Revision Control Model Number Non Communicating Equipment Adding Outdoor Unit Dehumidifier and Humidifier NON COMMUNICATING EQUIPMENT ADDING OUTDOOR UNIT System Devices Furnace Add or Remove Non communicating eq
70. cation mode will run the system at 70 of the cool ing air volume which will be in addition to the air volume reduction provided during the ramping profile During the dehumidification mode a d will be displayed on the furnace or air handler control The Indoor unit is not providing the expected air volume accord ing to the cfm shown on the in door unit control Indoor unit air volume settings in the iComfort thermostat are not correct System is operating in the cooling mode and following the cooling ramping profile or dehumidification air volume In the installer program select the equipment button and choose the furnace or air handler from the system devices list and press edit Verify set the correct air volume for heating and cooling modes If in the cooling mode check for cooling ramp mode or dehumidific ation mode as in 18 No second stage cooling is provided on a iComfort out door unit Space temperature is above second stage differential and has run in first stage a long time No red Critical Alert icon or alert is displayed in the homeowner alert button The red Critical Alert icon and homeowner alert button do not display non critical alerts Go to the installer program alert button to view all alerts and de tails about those alerts Look for alert code 401 Compressor Long On Cycle which indic ates compressor ran more than 18 hours continuous and will lock out 2nd st
71. ce The furnace discharge air Check temperature rise air flow and input rate Check for dirty filters The alarm temperature is high fault will clear when a heat call ends successfully Furnace The furnace is in Watchguard This is a five strike condition during a single demand Check for proper gas flow 270 Critical mode The furnace igniter cannot turn Ensure that igniter is lighting burner Check flame sensor current Check for dirty on the flame filters The alarm fault will clear on successful ignition oe This is a five strike condition during a single demand Check pressure inches w c 271 Critical rumaco Toe turnace s We ial et of low pressure switch closing during a heat call Measure operating pressure isopen P inches w c Inspect vent and combustion air inducer for correct operation and pen restriction The alarm fault will clear on successful ignition we Check operation of low pressure switch to see if it is stuck open during a heat call 272 Critical Furnace The furnace ls in vatehguard Measure operating pressure inches w c Inspect vent and combustion air inducer is open dudha tun E for correct operation and restriction The alarm fault will clear when a heat call ends P 9 successfully Furnace The furnace is in Watchguard Check micro amperes of flame sensor using thermostat diagnostics Clean or re ritica mode The furnace flame is going o place sensor Measure voltage of neutral to ground to ensure good unit ground T
72. ce tendo e to 24 Volt Power Low Range is 18 to 30 volts Check and correct voltage Check for 115 Critical board is lower than the required range additional power robbing equipment connected to system This alarm code may of 18 n OVAC qui 9 require the installation of an additional or larger VA transformer Damper Control Module The second 24 Volt Power Low Range is 18 to 30 volts Check and correct voltage Check for 115 Critical ary 24VAC damper control module is additional power robbing equipment connected to system This alarm code may low require the installation of an additional or larger VA transformer 117 Mi Furnace The reporting unit has poor Provide proper grounding for the unit Check for proper earth ground to the system nor earth grounding The alarm code will clear 30 seconds after it is corrected iar ie aiid FUMAS ain ander Typically this alarm code does not cause any issues and will clear on its own The 120 Moderate Module There PAA Ai in the Ther alarm code is usually caused by a delay in the outdoor unit responding to the ther mostat furnace kaaler or outdoor mostat Check all wiring connections Cleared after unresponsive device responds unit responding to the system to any inquiry Thermostat Furnace Air Handler Outdoor Unit Equipment Interface Equipment lost communication with the thermostat Check the wiring connections 124 Critical Module Damper Control Module The ohm wires and cycle power The alarm st
73. clears after the correct match is detected following a not been selected reset Remove the thermostat from the system while applying power and repro gramming 204 Critical Furnace There is a problem with the Check gas valve operation and wiring The alarm fault clears after the issue is cor m furnace gas valve rected 205 Critical Furnace The furnace gas valve relay Check wiring on control and gas valve The alarm fault clears after the issue is ruca contact is closed corrected Furnace will operate on 1st stage for the remainder of the heating demand The 206 Critical Naar manhe gas valve 2nd alarm fault will clear after the issue is corrected If unable to operate 2nd stage 9 y y replace control 207 Critical Furnace The furnace hot surface ig Measure the resistance of hot surface igniter Replace the it if it is not within the i niter is open specified range found in IOM The alarm fault clears after the issue is corrected Check pressure inches w c of low pressure switch closing during a heat call 223 Critical Furnace The furnace low pressure Measure operating pressure inches w c Inspect vent and combustion air inducer switch is open for correct operation and restriction The alarm fault clears after the issue is correc ted Check operation of low pressure switch to see if it is stuck closed for longer than 224 Critical Furnace The furnace low pressure 150 seconds during a heat call Measure operating pressure inches w c
74. culate Fan ON Time Temperature Unit System Name edit Dealer Number a Dealer Name Dealer Address Dealer Phone o back next 9 39 am Aug 15 2012 a current value WARNING Please enter your DEALER PHONE NUMBER or DEALER NUMBER If you do not enter either the thermostat will not show up on DaveNet and you will not be able to remotely monitor the system status or receive email alerts when there is a problem The dealer number is your Lennox account number i e A12345 Your dealer phone number should be the main office phone number associated with your dealership If you have any questions please contact your Lennox representative Are you sure you want to proceed yes no Figure 5 Dealer Number Selection and Warning Table 1 System Settings system settings CO Daylight Saving Time Circulate Fan ON Time Temperature Unit System Name Dealer Number Dealer Name Dealer Address Dealer Phone Parameter Name Time and Date Defaut Parameter Value Setting To adjust a setting highlight it then press edit current value 9 39 am Aug 15 2012 back next lt me Increment Time date elements screen Daylight Saving Time Enabled Enabled Disabled Circulate Fan ON time 35 Range 15 to 45 1 Temperature Unit Fahrenheit Fahrenheit or Celsius System Name key
75. d the heat rate is less than 85 BTU capacity then the heat pump will become the primary source of heat e With Staged Furnace assumes a staged control routine In steady state when the staged furnace demand satisfies the heat set point the system will switch back to heat pump heating as the primary heat source again bd Modulating Furnace The firing rate starts with the HEAT PUMP STARTING POINTS AFTER SWITCHING minimum capacity of the furnace and begins gas heating 4 using step change gains It will switch to steady state gains when the room temperature reaches the set point e Staged Furnace The staged algorithm is used to determine the starting heating stage of the furnace 2 DUEL FUEL DEFROST When the system is heating using the heat pump and defrost 3 cycle is initiated the following will occur e After the defrost cycle is completed the system will return to heat pump heating for ten minutes During the ten minutes period no heating mode changes will be made e After the ten minute ignore period is completed the system conditions are checked to determine if the current heating mode meets the system requirements NOTE The defrost cycle and the 10 minute ignore time following heat pump heating mode termination do not count towards any timer based requirement to switch heat sources TRANSITIONING FROM GAS TO HEAT PUMP 1 Step Change Mode While in step change mode the thermostat will not switch back to the heat
76. door unit iComfort Wi Fi iComfort furnace iComfort Equipment Interface and a non communicating heat pump Wiring See Communicating System and Optional Accessories Wiring diagrams 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the equipment interface module R i i C e 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the heat pump R i i C e Up to 8 conductor thermostat wire from the non communicating furnace terminal strip to the equipment interface module R C O Y1 Y2 G W1 W2 and W3 e Wiring as required for accessories DO NOT cut any option link on furnace control After the entire system is wired power up the system the iComfort Wi Fi thermostat will check the system for installed communication devices non communicating devices to the To adjust a setting screen Select System from the device list using the up down arrows and press the edit button Select Balance Point Control and press edit Use the down arrow to select Enabled and press save High and Low Balance Points will appear in red Complete Balance Point Control by editing the High and Low Balance Points It is not necessary to change the defaults but you must save each setting The red settings will go away after pressing save Press the back button to return to the adjust screen Use the arrows to select Furnace from system devices list press edit From this Furnace
77. due to this error De energize interlock relay and energize y y after 5 minutes if demand is still present 381 Moderate Equipment Interface Module Interlock Interlock relay continuously sensed with relay off No heating and cooling opera Critical relay stuck IFC or AHC modes only tions Alarm clears 30 seconds after fault clears table continued on next page iComfort Wi Fi Page 45 7 Day Programmable Communicating Thermostat Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button Alert Code Priority Alert Text Steps to clear 382 Moderate Wi failure IEG and ANG modes oxly W1 relay energized but input is not sensed after three seconds Thermostat demand Y1 is present but compressor is not running Check power to 400 Critical Nariel Pan The compressor internal unit Clears the error after current is sensed in both RUN and START sensors for at pen least 2 seconds or after service is removed or after power reset Compressor ran more than 18 hours to satisfy a single thermostat demand Will not utdoor Unit Either the compressor jockout system stage units wi inkin ight controls unit will run in low Outdoor Unit Either th p lockout syst If 2 stag its with blinking LED light control it wil
78. dule Heat Pump The O relay on O relay Stage 1 failed Pilot relay contacts did not close or the relay coil did not a the air handler EIM or heat pump has 345 Critical failed Either the pilot relay contacts did energize Replace control Cleared after the fault recovered following reset If error not close or the relay coil did not ener is applicable to the XC XP 25 the outdoor control will need to be replaced gize Air Handler The heat pump jumper Conti Su SA ey guration link s not removed on control Cut O R Applicable with non commu 346 Critical was not removed on the air handler nicating outdoor unit with communicating indoor system control board Furnace Air Handler Equipiment Interface Module The Y1 relay on the Operation stopped Y1 relay Stage 1 failed Pilot relay contacts did not close or 347 Critical furnace or air handler has failed the relay coil did not energize no input back to IFC chip Critical Alert Cleared Either the pilot relay contacts did not after reset and Y1 input sensed close or the relay coil did not energize Furnace Air Handler The Y2 relay on the furnace or air handler has Y2 relay Stage 2 failed Pilot relay contacts did not close or the relay coil did not 348 Critical failed Either the pilot relay contacts did energize no input back to IFC chip Critical Alert Cleared after reset and Y1 input not close or the relay coil did not ener sensed gize 349 Crit
79. e for cooling you must Install the non communicating air conditioning unit Select Add or Remove non communicating under the setup button in the Installer Section Select Outdoor Unit Type press the edit button and then choose 1 Stage AC or 2 Stage AC and press the save button On two stage air conditioners you must cut the W915 2 Stage Compr link on the furnace control Partial iComfort System iComfort Furnace and Non Communicating Lennox Brand Conventional Heat Pump Unit Dual Fuel If using a conventional non communicating heat pump unit in an iComfort dual fuel system then a iComfort Equipment Interface Module must be used and set up as a communicating heat pump iComfort Wi Fi Page 61 7 Day Programmable Communicating Thermostat Partial iComfort System iComfort Air Handler and Non Communicating Lennox Brand conventional Air Conditioner An iComfort air handler CBX32MV or CBX40UHV witha 7 conventional non communicating Lennox brand air conditioner unit IMPORTANT Be sure to set up the air handler control for heat strips if used prior to powering up the system and thermostat 8 1 Configure air handler control AHC for auxiliary heat strips if used 2 Wiring See Communicating System and optional 9 accessories Wiring diagrams 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the air handler R i i C e iComfort air hand
80. e out door sensor and or the DAS even after removing these op tional accessories The outdoor sensor and dis charge sensor are options however if the system was setup with the sensor in place the iComfort system will see an open sensor reading if it is disconnected Disconnect the outdoor sensor or discharge sensor Using the installer program reset the system by selecting setup button and follow the screen prompts as the thermostat goes through a new system discovery The iComfort thermostat will not provide me a choice to adda non communicating heat pump to a gas furnace iComfort Wi Fi The iComfort system does not have the ability to control a non communicating heat pump on a dual fuel system Page 51 Replace the iComfort thermostat with a conventional thermostat that has a dual fuel control mode e g Lennox ComfortSense 7000 table continued on next page 7 Day Programmable Communicating Thermostat During system discovery the thermostat displays a message Thermostat is unable to commu nicate to system components The thermostat was not suc cessful in communicating to the indoor unit Table 11 Troubleshooting Tips Bold text indicates a button or text display on the thermostat No Issue Problem Possible Cause Corrective Action Comments Verify the indoor unit has a iComfort communicating control Check wiring connections at R i i and C at the indoor uni
81. e to start This 292 Critical Fra A A AAA could be due to seized bearing stuck wheel obstruction etc Replace motor or start wheel if assembly does not operate or meet performance standards The alarm i fault clears after the indoor blower motor starts successfully The system will go into Watchguard mode Check combustion blower bearings 294 Critical Furnace There is over current in the wiring and amps Replace if does not operate or does not meet performance stand furnace inducer motor ards The alarm fault clears after inducer current is sensed to be in range after the ignition following the Watchguard mode or reset Indoor blower motor over temperature motor tripped on internal protector Check 295 Minor Fumane T he indoor blower motor is motor bearings and amps Replace if necessary The alarm fault clears after blower 9 demand is satisfied Furnace Air Handler Damper Con Compare outdoor sensor resistance to temperature resistance charts in installation Me trol Module There is a problem with A 310 Critical furnace or air handler discharae air instructions Replace sensor if necessary The alarm fault is cleared 30 seconds fu ia di ge al after fault is detected as recovered sensor i Warning Only Furnace blower in cutback mode due to restricted airflow Reduce 311 Minor Easa alrae E ait firing rate every 60 seconds to match available CFM Check filter and duct system back mode To clear replace filter if needed or r
82. ecific zone 5 Repeat procedure to configure all applicable zones 6 Press save E 7 Press next F Circulation Airflow Cooling Airflow or Heating Continue to next section on testing and diagnostics select one Blower Circulation Airflow e Cooling Airflow Heating Airflow all airflows must be selected and verified Edit and Test Airflow per Zone Maximum Airflow 1250 CFM Assigned Airflow 1250 CFM Zone 1 Zone 2 Zone3 Zone4 N 50 400 _ 400 150 J J J E N stop all 9 39 am Aug 15 2012 C save D cancel C next Figure 21 Editing Zone CFM 507343 01 Page 22 Using the Tests Diagnostics Features TO SELECT TESTS TO RUN Use the following procedure to run test for various heating and cooling stage operations select test to run w Blower O CJ HP Heat 1St Stage 2 nly appears Ca HP Heat 29 Stage select all test item is selected CI Defrost Now EJ Cooling 13t Stage deselect all N 7 Cooling 29 Stage 3 7 Gas Heat 1St Stage CJ Gas Heat 2nd Stage Figure 22 Selecting Tests 1 Select a specific tests 1 to run or use the select all 2 button to run all configurations Use the deselect all 3 button to un check desired test 2 Press the start button 4 to run all selected tests or press skip tests 5 to end the test procedure 3 After the tests are completed or you have selected s
83. energized and operational Particularly test the heat strips when used to insure the auxiliary stages operate as designed Press done e Wiring as required for accessories iComfort Wi Fi thermostat will check the system for installed communication devices 8 Exit the installer setup mode by selecting the EXIT button TIPS If the thermostat System Setting does not offer a choice for emerg heat and or the electric heat will not function the electric heat has not been configured Configure the electric heat as described on Page 56 or for complete detail see the Air Handler installation instructions Reconfigure the iComfort system by entering the installer program and selecting the setup button and following the prompts An outdoor temperature sensor is provided in an iComfort air conditioning unit To display the outdoor temperature on the home screen of the thermostat you must turn on or off the Outdoor Temp Display From the Home screen press press for more area and select the HELP icon Press the user preferences box and scroll down to Outdoor Temp Display Press the modify button and use the up down arrows to select On or Off and then press the save button Press done to return to the Home screen Turn the Indoor Humidity Display on and off in a similar manner as above Page 59 7 Day Programmable Communicating Thermostat Complete iComfort Systems Air Handler and Heat Pump Unit An iComfort
84. epair add duct 2 stage controls will reduce firing rate to 1st stage The alarm fault clears when a heat call finishes successfully Warning Only Restricted airflow Indoor blower is running at a reduced CFM Cut _ back Mode The variable speed motor has pre set speed and torque limiters to 312 Minor irene nied orb nat protect the motor from damage caused by operating outside of design parameters hi etic q 0 to 0 8 e g total external static pressure Check filter and duct system To clear g i replace filter if needed or repair add duct The alarm fault is cleared after the current service demand is satisfied F Check for proper configuring in installation instructions Alarm is just a warning The 313 Minor Fumace Alr Fander The door and system will operate but might not meet efficiency and capacity parameters The P f alarm will clear after commissioning is complete 507343 01 table continued on next page Page 44 Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button an Priority Alert Text Steps to clear 344 Critical Furnace Relay Y1 Failure nae relay failed operation stopped Alarm clears 300 seconds after Y1 input sensed Air Handler Equipiment Interface Mo
85. er THIS SCREEN ARE IN sn eon ee aa centage setting is ee g i Fi How Humidification Mode Works WiFi J es amawis ane IOI DISPLAY BASIC AND PRECISION These modes allow user control of relative humidity between 15 and 45 These conditions must be met for either mode to operate e humidification mode has been enabled and e the unit is in HEAT mode and e humidification demand exists 24V present at H and e DISPLAY mode indicates humidification is OFF BASIC mode mode also requires presence of heating demand Y for HP heat or W for gas heat W may be ener gized with G de energized PRECISION Available only if Wi Fi is operational or outdoor sensor is attached Basic Dew Point Control adjustment mode will change the humidification set point based on the outdoor temperature and a user defined dew point adjustment setting Precision Dew Point Control adjustment mode will operate when these conditions are met e humidification mode has been enabled and e the unit is in HEAT mode and e humidification demand exists 24V present at H Figure 15 Humidification Settings Controls 507343 01 Page 18 SYSTEM DEVICES SCREEN HUMIDITROL COMFORT ADJUSTMENT e e Pre adjustment REQUIREMENTS 1st the device has been installed 2nd from the Add or Remove Non communicating equip ment press next 3rd in the Adjust a setting screen configure the device as follows
86. er i Replace indoor unit control board if there is no response Thermostat The thermostat found 14 Critical more nan one tnermostat more tnan Check wiring and remove duplicate equipment Reconfigure system door unit on the system Thermostat The outside temperature is below the level where the heat pump vee F 18 Minor is programmed to heat the home The Montication only OutdsoriTemp IS below the Low Balance Point Heat Pump will system will not use the heat pump to 9 i warm your home Thermostat The outside temperature is higher than the level where the fur peaks f F F P Notification only Outdoor Temp is above the High Balance Point Indoor Unit fur 19 Minor work The Sateen dee the D nace or air handler will not be used to service a heating demand pump to warm your home Thermostat The thermostat hi reading Indoor temperature rose above 99 F during a heating or cooling demand Heating 29 Critical than 99 F i aaeb wili EM allow operation is not allowed Check to ensure that Heating Equipment is not stuck ON any heating operation to begin until it reversing valve etc Check the accuracy of the thermostat temperature sensor senses a temperature lower than 99 F Select cooling system mode to cool the indoor space Thermostat The thermostat is reading an indoor temperature that is lower than Indoor Temp fell below 40 F Cooling operation is not allowed Check to ensure that 30 Moderate 40 F The thermostat will not all
87. ermostat to enable remote access and online weather information enter your email System Desc 507343 01 3 A pop up screen asking if the email address below is correct Verify the email address is correct and press yes 4 Another pop up screen will appear notifying the user to check their email An email has been sent to XXXXXXXXXX lennoxind com with instructions on how to register your thermostat If you haven t received the email please check your spam folder and make sure that your email address is correct NOTE If the email address originally entered is incorrect return to the thermostat registered screen and reenter the correct information and press register 5 After the iComfort Wi Fi server sends the email with the network link registration and account creation must be completed on the homeowners personal computer see Page 27 NOTE Time from pushing the registration button on the thermostat and receiving the consumer portal register link from your email on your computer is normally from 5 to 15 minutes 6 After registration has been completed press the connection status icon to verify the connection was successful If the connection is successful the server icon background will be green router internet server 7 After successful connection to the server is completed the firmware update button will appear The default setting is set to auto If any firmware
88. es according the needs of the home When you change certain settings the system will prompt you to please view and save all red settings Use the arrows to select the red settings and press edit Either make changes or not but press save either way The red settings will go away after pressing save When all CFM settings are complete press the back button Press next step to advance to the tests button Test the system operation and confirm the HP unit is electrically energized and operational Press done Exit the installer setup mode by selecting the EXIT button An outdoor temperature sensor is provided in an iComfort heat pump unit To display the outdoor temperature on the home screen of the thermostat you must turn on or off the Outdoor Temp Display From the Home screen press press for more area and select the HELP icon Press the user preferences box and scroll down to Outdoor Temp Display Press the modify button and use the up down arrows to select On or Off and then press the save button Press done to return to the Home screen Turn the Indoor Humidity Display on and off in a similar manner as above Gas heat is provided to temper the air during defrost cycles Page 58 Complete iComfort Systems Air Handler and Air Conditioner An iComfort air handler CBX32MV or CBX40UHV with an iComfort air conditioner XC17 XC21 or XC25 only IMPORTANT Be sure to configure the air handler control s
89. es within an hour system will lockout To clear disconnect power to outdoor unit and restart The inverter has detected a PFC over current condition This would be caused by a high load condition high pressure or outdoor fan failure Outdoor control will display the code when the inverter has the error After 3 minutes the inverter will reset and the com pressor will turn on again If it happens 10 times within a 60 minute rolling time period the OD control will lock out operation of the outdoor unit and display a critical code Possible issue is system running at high pressures Check for high pressure trips or oth er alert codes in room thermostat and outdoor control Input current is approaching a high limit Compressor speed will automatically slow down The control continues sending the inverter speed demanded by the thermostat The control will set indoor CFM and outdoor RPM to values according to demand per centage rather than the actual Hz Alarm is automatically clear 507343 01 table continued on next page Page 48 Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button Alert Code Priority Alert Text Steps to clear Heat sink temperature is approaching limit The compressor speed automatica
90. ethod 2 Connection Status Method 1 Press connection status this screen shows a graphical view of the current connection status 9D server router internet 2 Select the router icon to choose the desire W Fi network When selecting a unsecured connection a screen will appear with two options connect and router info Press connect to continue secured connection a screen will appear requesting the Wi Fi network password security key There are two options to select from which are connect and router info Using the on screen keyboard enter the password security key and then press connect to continue e 3 If connection is successful the screen will return to the e available networks screens Press X to return to the previous screen If the connection was successful it will be listed connected as exampled below WI FI SETTINGS ey cS cS ey XXXX Ga connected not reg Ga Press to see press to enable press to change press to change connection status disable Wi FI wireless network thermostat registration Must setup a network connection before registering thermostat WA Fi 0 30 am Aug 15 2012 Z LENNOX Figure 30 Network Connected iComfort Wi Fi Page 25 4 Select X to return to the WI FI SETTINGS screen Select connection status again to verify that connection to the router and Internet is active Both the router and Internet icons will have green backgrounds if con
91. for circulation Circulate is enabled on the user s home screen or system settings page It keeps air circulating from 15 to 50 percent of time The following settings approximate how long the fan will run at these typical settings 15 9 minutes fan run time per hour 25 15 minutes fan run time per hour 35 21 minutes fan run time per hour 45 27 minutes fan run time per hour 7 Day Programmable Communicating Thermostat DEALER NUMBER Either the dealer number or phone number is required Once either number is entered all other fields will automatically be populated once the thermostat has been registered during the Wi FI setup procedure later on in this instruction if the dealer has an account with Lennox already NOTE Dealer number is the dealer s Lennox account number Dealer phone number is the dealer s main office phone number 1 Use the arrows to scroll down to the Dealer Number or Dealer Phone setting Press the edit button 2 Enter the Dealer Number or Dealer Phone Number using the on screen keyboard see figure 5 Press save to continue NOTE If a Dealer Number or Dealer Phone Number is not entered and the next button is selected a pop up warning screen will appear 3 Press yes to continue to the System Devices screen Press no to return to the system settings screen system settings To adjust a setting highlight it Time and Date then press edit Daylight Saving Time Cir
92. fter changing press save note High HP Air ow p an s Reset Al the current value has changed figure 37C Some changes may Continuous indoor BI E affect other settings and if so those affected will appear in red and Heating Indoor Blower 325 ko require changing saving to clear the red settings De p 5 When finished press back equipment parameters screen then ae E press next Select tests to run screen appears either run tests as before or press skip tests Figure 37 Edit Equipment Details Stage Delay and Differential Settings Installer settings First Stage Differential First Stage differential is used in all thermostats The default setting is 1 0 F with an optional setting range between 0 5 and 3 0 F in 0 5 F increments From the equipment button use the arrows to select First Stage Differential Press edit Use the up down arrows to adjust to the desired setting and press save Second Stage Differential where applicable The default is 1 0 F but can be programmed between 0 5 and 8 0 F in 0 5 F increments Third Stage through Sixth Stage Differential where applicable The default is 0 5 F but can be programmed between 0 5 F and 8 0 F in 0 5 F increments NOTE Each stage differential is based on the previous stage differential endpoint For example in cooling mode if stage 1 differential is set to 1 0 F then the system comes on 0 5 F above
93. gs are complete press the back button Press next step to advance to the tests button Test the system operation and confirm the system is electrically energized and operational Particularly test the heat strips when used to insure the auxiliary stages have been detected and are operational Press done Exit the installer setup mode by selecting the EXIT button If the thermostat System Setting does not offer a choice for emerg heat and or the electric heat will not function the electric heat has not been configured Configure the electric heat as described on Page 56 or for complete detail see the Air Handler installation instructions Reconfigure the iComfort system by entering the installer program and selecting the setup button and following the prompts If the thermostat System Setting only shows heat only or off choices and does not offer a choice for cooling you must Install the non communicating air conditioning unit Select Add or Remove non communicating under the setup button in the Installer Section Select Outdoor Unit Type press the edit button and then choose 1 Stage AC or 2 Stage AC and press the save button For two stage air conditioners you must cut the Y1 Y2 2 stage comp on board clippable link on the air handler control 507343 01 Page 62 Partial iComfort System iComfort Air Handler and Non Communicating Lennox Brand conventional Heat Pump Unit
94. gure 10 Complete iComfort System Devices Screen Humidification Setting 507343 01 Page 14 FEATURE SCREEN HUMIDIFICATION SETTINGS 1 From the Main Screen press the right arrow icon to VST T SCT ANCS go the the Features screen b ly whi 2 From the Features screen select system settings SEE ITP a anHENTeR CORRE Pee nee epe t 3 Touch the button of the humidification controls you ao vam want to adjust if it says humidifier OFF one touch Cima ey COMFORT t ti will display a selection for ON ais default is ON default is DRY default is ON 4 When you touch the set to button the arrows ap Select the humidity level H i idi that match pear allowing you to change to the desired humidity redare weater percentage setting How Humidification Mode Works Wi Fi 9 39 am Aug 15 2012 DISPLAY BASIC AND PRECISION These modes allow user control of relative humidity between 15 and 45 These conditions must be met for either mode to operate e humidification mode has been enabled and e the unit is in HEAT mode and e humidification demand exists 24V present at H and e DISPLAY mode indicates humidification is OFF BASIC mode mode also requires presence of heating demand Y for HP heat or W for gas heat W may be energized with G de energized PRECISION Available only if Wi Fi is operational or outdoor sensor is attached Basic Dew Point Control adjustment mode will ch
95. h include both a variable capacity heat pump XP25 and a variable capacity gas furnace SLP98 will provide variable capacity heating 3 Tempering Staged Furnace Dual fuel tempering staged furnace employs no sensor implementation Furnace cycles on and off at first stage rate e First cycle on time is longer than subsequent times to bring temperature up e Subsequent times are shorter to maintain temperature 4 Tempering Variable Capacity Modulating Furnace SLP98 Dual fuel tempering staged furnace employs no sensor implementation Furnace starts heating at minimum heat rate while defrost is active e Testing has shown the entering air is within acceptable limits e During defrost the airflow will run at second stage CFM 7 Day Programmable Communicating Thermostat Shut down HP Abbreviations Stg 1 Stg2 FURN auxiliary heat provided by gas furnace HP compressor heat LBP Low Balance Point HBP High Balance Point T stat thermostat FURN NOTE 1 Each Heat Pump and Furnace Heat stage will operate Operate HP heat until it meets the demand or until its stage timer lapses 20 Stg 1 Stg 2 lockout minutes by default If the timer lapses before the demand is met the system brings on the next stage in order of T HP stg 1 HP stg 2 FURN stg 1 FURN stg 2 NOTE 2 The chart below illustrates how the balance points HP stage s operate first control whet
96. he 273 Critical de The fi fl i i ff M It f neutral t dt d unit d Th during a heating cycle alarm fault will clear when a heat call ends successfully 274 Critical Furnace The furnace limit switch has The system will go into Watchguard mode Check firing rate and air flow Check for u been open for more than 3 minutes blockage The alarm fault will clear when a heat call ends successfully 275 Critical Furnace The furnace flame is out of The system will go into Watchguard mode Shut off gas Check for gas valve leak w sequence The alarm fault will clear on next successful ignition Furnace The furnace is not able to The system will go into Watchguard mode Check vent system and pressure 276 Critical calibrate or the high pressure switch switch wiring connections The fault alarm will clear when the furnace calibrates opened or failed to close in run mode itself successfully The system will go into Watchguard mode Measure resistance of hot surface ig 290 Critical Furnace TNErS IS a problem witi the niter Replace the hot surface ignitor it is not within specifications The alarm fault 9 f will clear on next successful ignition The system will go into Watchguard mode Check for dirty filters and other air flow 291 Critical Fumace The heating Airflow is below restrictions Check blower performance The alarm fault will clear when a heat call q i ends successfully The system will go into Watchguard mode Indoor blower motor unabl
97. her HP or FURN will operate to provide heat then FURN stage s if needed see NOTE 1 i outdoor START between Operate HP Ww temperature HERE HBP and LBP gt gt Stg 1 Stg 2 aw S See NOTE 2 E COMPRESSOR ONLY at or 5goF HBP FURNACE LOCKOUT below uS TEMPERATURE LBP SG EITHER COMPRESSOR OR W y FURN HEAT F5 250F LBP COMPRESSOR LOCK Opens FURN t OUT TEMPERATURE perate Stg 1 Stg 2 Qe FURN ONLY Operate FURN 5 Stg 1 Stg 2 ie eee NOTE 3 If emergency heat is selected Furnace is used Shut down FURN Stgi Stg2 l NO Figure 42 Dual Fuel Operation with Balance Points 507343 01 Page 36 Modulating Outdoor Units with Duel Fuel TRANSITION FROM HEAT PUMP TO GAS 2 Steady State If heating demand rises above 95 Btu capacity for 10 minutes or greater and the temperature is greater than 1 5 F less then the set point then the system will switches the heat source to gas heating Step Change State If heating demand rises above 95 Btu capacity for at least ten minutes and the minute slope of the temperature sensor is less than 1 F Hr then the system switches the heat source to gas heating FURNACE STARTING POINT AFTER SWITCHING Steady State Mode With Modulating Furnace In steady state when the temperature is less than 0 5 F from set point furnace has been running for more than 15 minutes an
98. hoot the Target Set point Defrost Operations This section is applicable only to heat pumps that are using outdoor control part number 103369 03 or higher System Devices System Furnace Thermostat Power 120VAC Humidifier OI gt To adjust a setting highlight it then press Edit C about System Heat Pump Equipment Name Compressor Short Cycle Delay Defrost termination Temp Humidification Control Mode current value Basic Configure the device as follows 1 In the system devices list use the arrows 1a to highlight Heat Pump Press edit 1b 2 In the Heat Pump list use the arrows 2a to highlight the desired option Press edit 2b Automatic Max Defrost Max Defrost by Weather Compressor Shift Delay On Off reset J p Figure 38 Adjust Defrost Settings DEFROST TERMINATION TEMPERATURE 1 The Defrost Termination Temp parameter factory default is 50 F 10 C This setting can be changed to terminate defrost at 70 F 90 F or MAX 21 C 32 C and MAX NOTE Colder climates may require a higher defrost termination temperature to maintain a clear coil 2 If the parameter is set to MAX defrost will run maximum defrost sequence AUTOMATIC MAX DEFROST These features are only available when the heat pump outdoor control part number is 103369 03 or later See figure 40 for the sequence of operations for Automatic Ma
99. ical Furnace The O to R jumper on the Configuration link R to O needs to be restored Replace link or hard wire Applic Meal furnace needs to be restored able in non communicating mode Critical Alert a Heat call with no configured or incorrectly configured electric heat Check for proper 350 Critical air pandis eat pander electric configuring under Configuring Electric Heat Stages in the air handler installation 9 i instructions Cleared after electrical heat detection is successful Air Handler There is a problem with the air handler s 1st stage electric heat Heat section Stage 1 failed Pilot relay contacts did not close or the relay coil in 351 Critical Either the pilot relay contacts did not the electric heat section did not energize Air handler will operate on 1st stage for close or the relay coil in the electric reminder of the heat call Will clear after fault recovered heat section did not energize Air Handler There is a problem with the air handler s 2nd stage electric heat Either the pilot relay contacts did 352 Critical not close or the relay coil in the electric Heat section Stage 2 failed Same as Code 351 heat section did not energize The air handler will operate on 1st stage elec tric heat until the issue is resolved Air Handler There is a problem with the air handler s 3rd stage electric heat Either the pilot relay contacts did not 353 Critical close or the relay coil in the electric Heat
100. iditrol Comfort Adjust pal Maximum Minimum and Midpoint vercooling Overcooling Humidification Control Mode Basic e e Reyes ei Max Humidification Setpoint 45 F 15 to 45 F 1 F Auto Changeover Humidif Dead band 5 F 5 to 10 F 1 F Dew Point Adjustment O F 15 F to 15 F 1 F Humiditrol and Aux Dehum Min Run Time 15 minutes 5 to 30 minutes 5 minutes HP Heating Lockout Time enabled in zoning system When heat pump cannot satisfy demand in a reason time the control switches to gas heating and lockout 120 minutes 60 to 240 minutes 30 minutes the heat pump for 120 minutes by default Heat Cool Stages Locked In Disabled Enabled Disabled 1st Stage Differential 1 0 F 0 5 to 3 F 0 5 F 2nd Stage Differential 1 0 F 0 5 to 8 F 0 5 F 3nd Stage Differential 1 0 F 0 5 to 8 F 0 5 F Stage Delay Timers Enabled Enabled Disabled 2nd Stage Delay 20 Minutes 5 to 120 Minutes 5 Min 3rd Stage Delay 20 Minutes 5 to 120 Minutes 5 Min Electric Heat Stage During Defrost Used to adjust the number of electric heat 2 0to5 1 ing elements that will be energized when the heat pump is in defrost mode Min De humidification Setpoint 40 50 to 55 RH 1 Outdoor Temperature Reading Calibration 0 F 10 to 10 F 1 F Zoning Gas heating DAT Cool down Target 100 F 80 to 110 F 1 F Zoning Anticipated Discharge Air Temperature Adjustment 60 Seconds 0 to 120 seconds 5 seconds Zoning Target Supply Air Temp for Cooling 50 F 50 to 60 F 1 F Zoning Ta
101. info button provides information concerning the home Wi fi connection i e RSSI IP address MAC address and wait state all of which may be helpful in troubleshooting network connection issues 3 If connection is successful the screen will return to the available networks screens Press X to return to the Page 24 previous screen If the connection was successful it will be listed connected as exampled below WI FI SETTINGS eS eS Press to s ee FI fre connected not ee reg Ge press to enable press to change press to change thermostat registration Must setup a network connection before registering thermostat connection aah disable Wi FI wireless network Weri 9 39 am Aug 15 2012 I O LENNOX Figure 29 Network Connected ESTABLISHING A WI FI CONNECTIONS TO A HIDDEN NETWORK 1 When connecting to a hidden network press the add new network icon to continue Enter the network name SSID If security encryption is enabled then press the security is none icon Select either WEP WPA or WPA2 2 Using the on screen keyboard enter the password security key If the network name or security key combination is incorrect or incorrectly type and access to the specified network failed a message will alert you to retry e 3 If connection is successful the screen will return to the available networks screens The network successfully connected will be listed and shown as connected as exampled in figure 29 M
102. inutes If this occurs 3 time in one thermostat call the outdoor unit will locked out and display a critical code 1 Loose electrical connections 2 Interruption of main power to inverter 1 Check all electrical connections 2 Check for proper main power to inverter When this error occurs the outdoor control will cycle power to the inverter by opening the contactor for 2 minutes Outdoor control will cycle power to the inverter 3 times and then outdoor unit is locked out This occurs when the heat sink temperature exceeds the inverter limit Inverter will issue code 13 first and slow down to try to cool the heat since If temperature remains high outdoor unit will stop compressor and fan Anti short cycle is initiated If condition oc curs 5 times within an hour system will lockout System will stop To clear disconnect power to outdoor unit and restart Feedback from supplier tear down of inverter indicates that the screws that hold the in verter to the inverter board were loose causing poor contact between these two compon ents Tighten screws that hold the heat sink to the inverter control board NOTE Wait 5 minutes to all capacitor to discharge before checking screws This occurs when the temperature sensor detects a temperature less than 0 4 F or greater than 264 F after 10 minutes of operation If condition is detected outdoor unit will stop compressor and fan Anti short cycle is initiated If condition occurs 5 tim
103. is turned on 2 When SSR is enabled then it will check for a new set point every 30 seconds 3 The SSR Target Program Schedule set point is always 2 hours ahead 4 When SSR starts then the Current SSR set point will equal the current program schedule set point 5 When a new program schedule period starts then the New SSR set point will equal the new program schedule 507343 01 N 10 11 12 13 14 15 16 Page 30 period s set point unless there are two or more program periods within the 2 hour window In this case SSR will track the highest heat set point or the lowest cool set point found in the 2 hour window SSR will NOT run during a program schedule HOLD SSR does NOT look at the current temperature If the target program heat set point is lower than the Current SSR heat set point then the New SSR Heat Set point will equal the Current SSR Set point If the target program cool set point is higher than the Current SSR cool set point then the New SSR Cool Set point will equal the Current SSR Set point The New SSR Set point will be displayed on the User Interface SSR does NOT control the equipment SSR does NOT turn off Stage Delay Timers SSR does NOT round the newly rounded set point but the set point shown on the user interface is rounded SSR will NOT change the Temperature Dead band SSR will not adjust a set point to violate the Temperature Dead band SSR will not overs
104. kip test select the exit button to end NOTE Test mode lasts for 30 minutes with the temperature updating every 30 seconds except for the defrost test which lasts 30 seconds Tests feature provides the technician time to manually verify the equipment operation The tests feature is available after setup has been completed once After you press next in the final setup screen the select tests to run screen figure 22 will appear If you want you may skip tests press skip tests To run all of the tests press select all All boxes in the list of tests will be checked Or touch box es next to test s to run certain tests After the tests have been started the screen will describe which test is running and shows a diagnostic summary of each test see figure 23 After reviewing the results and concluding that no further tests are needed press next to proceed to next iComfort Wi Fi Page 23 test The technician must verify that the test procedure is producing the desired result at the equipment After pressing next after the final test the Testing finished screen will appear figure 24 At this point use the EXIT button if you have completed the required setup or use diagnostics button to analyze the system or use equipment button if you wish to make any changes to device details setup D _ tests equipment g alerte ap diagnostics current test Blower Check Blower Operation
105. l in 401 Moderate ran for more than 18 hours continuously speed units with 7 segment display will display code but continue to run in high trying to cool the home or the refriger speed If a Heat Pump and if outdoor temp is less than 65 degrees code is ig ant pressure in the system is low nored Clears the error after 30 consecutive normal run cycles or power reset Also p in the sy is d Cl th fter 30 ti ycl p t Al monitors low pressure switch trips 402 Critical NS acitiedlpe BIET S disenarge or Sr Discharge or suction pressure out of limits or compressor overloaded Clears the mM the is Sumpressoi overloaded i error after 4 consecutive normal compressor run cycles 403 Moderate Outdoor Stes a aha Compressor runs less than 3 minutes to satisfy a thermostat demand Clears the stat demand error after 4 consecutive normal run cycles or power reset Outdoor Unit The compressor rotor is locked up This could be due to a short Compressor rotor locked up due to run capacitor short bearings are seized ex 404 Critical circuiting of the run capacitor seizing of cessive liquid refrigerant etc NOTE May need to install hard start kit Clears the the bearings or excessive liquid refri error after 4 consecutive normal run cycles or after power reset gerant etc 405 Critical O utaoor nit ane TEN et Compressor circuit open due to power disconnection open fuse etc Clears the i necio open fuse etc P error after 1 normal compressor run cyc
106. le Outdoor Unit The required amount of Regui oF quired amount of current is not passing through Start current transformer Clears 406 Critical curent enor Rass ng through the start the error after current is sensed in START sensor or after power reset Outdoor Unit The required amount of Required amount of current is not passing through Run current transformer Clears 407 Critical current is not passing through run cur the error after current is sensed in RUN sensor or 1 normal compressor run cycle rent transformer or after power reset 408 Critical Outdoor Unit The compressor is run Compressor runs continuously Clears the error after 1 normal compressor run mM ning continuously cycle or after power reset Furnace Air Handler Outdoor Unit The secondary voltage for the furnace g on ie di f A econdary voltage is below 18VAC After 10 minutes operation is discontinued 409 Moderate edie cnaoor uni has palen Clears the code after voltage is higher than 20 VAC for 2 seconds or after power minutes the thermostat will turn off the reset furnace air handler or outdoor unit 410 Moderate Outdoor Unit The outdoor unit pres Unit pressures are below the lower limit Pressure switch opens at 40 psig system sure is below the required limit shuts down and closes at 90 psig system restarts Outdoor snio mhe low pressure swilen Open low pressure switch error count reached 5 strikes Check system charge 411 Critical as ope
107. ler to conventional Lennox brand air conditioner 5 8 wires Y1 Y2 C R W1 W2 e Wiring as required for accessories 3 On air handler control when matched with conventional Lennox brand 2 stage air conditioner cut the Y1 Y2 2 stage comp on board clippable link 4 On air handler control remove jumper between W1 and W2 for two stage electric heat only 10 5 After the entire system is wired power up the system the iComfort Wi Fi thermostat will check the system for installed communication devices 6 In the installer setup button select Add or Remove 11 non communicating equipment by pressing the yes button TIPS Select the Outdoor Unit Type from the device list using the up down arrows and press the edit button Then select the air conditioner type 1 stage AC or 2 stage AC and press the save button On the thermostat go past the Add or remove non communicating equipment to the To adjust a setting screen Use the arrows to select Air Handler from system devices list press edit From this air handler screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When you change certain settings the system will prompt you to please view and save all red settings Use the arrows to select the red settings and press edit Either make changes or not but press save either way The red settings will go away after pressing save When all CFM settin
108. lled Dehumidifier m Select one Not Installed 3a Humiditrol Auxiliary Dehumidifier to add remove adjust a device select it then press edit non communicating device list Outdoor Unit eS Outdoor Unit Capacity Humidifier 4a Humiditrol Dehumidifier current value To add or remove a dehumidifier you must be at the Add or Remove Non communicating equipment screen 1 Press the yes button on this screen see 1 2 In the non communicating device list screen use the arrows 2a to highlight Dehumidifier and press edit 2b Note the current value e g Not Installed Touch one of the radio buttons 3a to select the type of dehumidifier or select Not Installed if removing dehumidifier press save 3b 4 When you scroll to the Dehumidifier device 4a Note the current value e g Humiditrol Click back 4b to return to the Add or Remove screen 1 5 The Add or Remove screen reappears with your addition shown in the system devices list 5a At this point you may add more equipment press yes or if finished press the next button 5b to advance to the Adjust a setting screen NOTE Adding humidity regulating non communicating devices may be a 2 step procedure 1st the device must be installed and wired After the dehumidifier is installed the setting under the System mode Dehumidification Control Mode defaults to Basic
109. lled Zone 4 Temp Reading Calibration NOTE More zoning parameters are available under system devices gt system on page 9 iComfort Wi Fi Page 13 7 Day Programmable Communicating Thermostat Complete iComfort System Adjusting Humidification Settings SYSTEM DEVICES SCREEN HUMIDIFICATION CONTROL MODE SETTINGS Pre adjustment REQUIREMENTS 1st the device has been installed see page 6 System Devices To adjust a setting highlight it p 7 A then press Edit 2nd you pressed next at the Add or Remove screen Air Conditioner System z T see page 6 F about A ei Ga cy Configure the device as follows ermostat ai Bowen 120VAC Mumidimer q 1b edit 1 In the system devices list use the arrows 1a to high Re light System Press edit 1b ystem Humidification Control Mode ii wr 2nd Stage Differential a 2 In the System list use the arrows 2a to highlight Hu Staged Delay Timers current value midification Control Mode The current value defaults 2nd Stage Delay 2a Basic pale to Basic mode Press edit 2b Min Dehumidification S i 2 y 3 Touch one of the radio buttons 3a to select the mode of humidification control press save 3b After saving aA ease numnidincabon Control Made C ee D check that the current value now shows the new selec n tion Display Only Basic Precision Basic Dew Point Control hek 4 Press the
110. lly slows to reduce heat sink temperature The control sets indoor CFM and outdoor RPM to val ues according to demand percentage rather than the actual Hz Alarm is automatically cleared 440 Moderate Sra is ee edited slowdown due Feedback from supplier tear down of inverter indicates that the screws that hold the in O MJT Neal sink temperature verter to the inverter board were loose causing poor contact between these two compon ents Tighten screws that hold the heat sink to the inverter control board NOTE Wait 5 minutes to all capacitor to discharge before checking screws Compressor slowdown due to high compressor current Compressor current is ap proaching limit The compressor speed automatically slows The control sets indoor CFM and outdoor RPM to values according to demand percentage rather than the actual Outdoor Unit Compressor slowdown due 441 Moderate 55 high compressor current Hz Alarm is automatically cleared Possible issue is system running at high pressures Check for high pressure trips or oth er alert codes in room thermostat and outdoor control Outdoor Unit The top cap switch has Pre 442 Critical opened 5 times within one hour As a result tee penis ales pae a a 5 ee ae 1 hour Outdoor unit the outdoor unit is locked out will stop To clear disconnect power to outdoor unit and restart Check for proper configuring under unit size codes for outdoor unit on configuration 443 Critical Outdoor Unit Incorrect
111. lt A ON 50 30S 82 7 5min OFF 5 30S B ON 82 7 5min OFF No delays C ON No delays OFF 45sec delay D No delays Equipment Name Airflow Profile Cooling A 1 None Continuous Indoor Blower Airflow nnnn CFM See Note 3 at end of table De humidification Airflow 70 8 None Heating Indoor blower OFF delay DIP SW None DIP switch setting in Non comm Heating Indoor blower ON delay 30 sec 45 5 None 45 sec fixed in Non Comm IFC Cooling Indoor blower OFF delay 0 sec 30 joe Not used on Non Comm IFC Cooling indoor Blower ON Delay 2 sec 10 grd 2 sec fixed in Non Comm IFC Heat Pump present Heat Pump present HP Indoor Blower OFF Delay 45 sec 60 Not used on Non Comm IFC HP Indoor Blower ON Delay 0 sec 0 30 5 Not used on Non Comm IFC Heating Airflow Control Type Selections available if discharge air temperature sensor is installed fixed cfm and fixed discharge air temperature Low Heating Airflow High Heating Airflow Gas Heat Airflow Settings Heating Airflow Control Type variable capacity furnaces only Low Heating Airflow CFM min heat Heating Airflow High Heating Airflow Control Type 0 CFM 100 heat See furnace docu Low Heating Discharge Air Hla Sears we Temperature DAT min heat DIP SW tions for size spe variable capacity furnaces only cific information Heating Airflow High Heating Discharge Air Control Type 1 Temperature DAT 100 heat
112. m will clear code when it detects condition has cleared table continued on next page iComfort Wi Fi Page 41 7 Day Programmable Communicating Thermostat Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button ae Priority Alert Text Steps to clear Run the system in diagnostic mode and verify that it matches actual equipment Thermostat The system has not been operation Check for other alarms codes that may be preventing the system from 39 Critical able to turn on the cooling for more than operating as expected 45 minutes The system will go offline Step 1 Check all cooling equipment to determine cause for 60 minutes and try again Step 2 Recycle power System will clear code when it detects condition has cleared 40 Thermostat Furnace Air Handler Equipment is unable to communicate This may indicate the existence of other Outdoor Unit Equpment Interface alarms codes In most cases errors are related to electrical noise Make sure high 105 Critical Module Damper Control Module The voltage power is separated from RSBus Check for incorrectly wired and or loose Thermostat furnace air handler or connections between the Thermostat indoor unit and outdoor unit Check for a high outdoor unit has los
113. ment Interface Module Non communicating Conventional Indoor Unit and iComfort Outdoor Unit c i iComfort indoor unit OOOO R See iHarmony Damper Control Module Installation Instruction for connections to GREEN E Os hte Conta gS Wi Fi i O ERO i RIOT THQ IR RSBus fre SEN i T WHITE 7 Q YELLOW _ In Zone Py Sp Thermostats R SJ PWR S o jPwr D 2 D O D D S c S c Q 9S PWR QIJPWR TS a IR D D c Q jic 8 Damper Control Module DCM dampers and sensor inputs Figure 15 iComfort Wi Fi iHarmony Damper DAS NOTE The discharge air sensor is intended to be mounted downstream of the heat exchanger and air conditioning coil It must be placed in free airflow where other accessories such as humidifiers UV lights etc will not interfere with its accuracy Wiring distance between the IFC or AHC and the discharge air sensor should not exceed 10 feet when wired with 18 gauge thermostat wire 507343 01 Control Module and Communicating Indoor Unit OAS NOTE The outdoor temperature sensor wiring distance between the IFC or AHC should not exceed 200 feet when wired with 18 gauge thermostat wire RSBUS NOTE Maximum total length of all connections on the RSBus is limited to 1500 ft 450 m
114. mfort Wi Fi thermostat interface go to the homeowners computer and locate the email sent from the server Dear Customer Congratulations on your purchase of a Lennox iComfort thermostat You are only a few steps away from total control of your Lennox iComfort system Registering your thermostat will allow you to remotely access it from anywhere in the world on any device with an Internet connection Please complete your Lennox iComfort registration by clicking the link below Register NOTE if the customer has already setup an account click the Click Here button to access that account Click on the Register link the screen to the left will appear Fill in the User Name and Password fields and check the agree to terms and conditions box Click Create User button A series of pages and prompts follows to provide guidance through profile setup and user preference definitions Using the Secure Web Portal Access all the great Wi Fi enabled features on your iComfort thermostat from our secure web portal www myicomfort com After signing in you ll be able to view your iComfort system settings adjust the temperature and view reminders and alerts just as you would on your iComfort thermostat at home With a familiar look and settings this simple you should feel right at home Don t forget to check out the available Apps and skins iComfort Wi Fi Page 27 From the web portal welcome page you may also click
115. n 25 Registering the Thermostat 26 Account Registration for Server 27 Using the Secure Web Portal 27 SKINS 423 eerie vane ie teens wate aan anche 27 Screen Saver ove ecb eee ceeded n eee deen 27 Accessing Installer Screens and Changing Equipment Parameters 2 02 05 28 Stage Delay and Differential Settings Installer Settings 2 000000005 29 Smooth Setback Recover 0 00e 30 Max Defrost 00 cece eee 31 Heat Pump Dual Fuel Duel Fuel Tempering and Balance Points 0 cece eee eee 35 Modulating Outdoor Unit with Duel Fuel 37 507343 01 Gas Heat Control 02 00 0 eee eee 38 Alerts and Troubleshooting 40 Wiring Diagrams 00 0 cee eee 53 Configuring Air Handler Electric Heat 56 Typical Systems Setup 22 00 5 57 iComfort Furnace and Air Conditioner 57 iComfort Furnace and Heat Pump Dual Fuel 58 iComfort Air Handler and Air Conditioner 59 iComfort Air Handler and Heat Pump 60 iComfort Furnace and non communicating Air Conditioner sere bisere ti tenaa ta aA E RA 61 iComfort Furnace and Non communicating Heat Pump Dual Fuel 000022 eens 61 iComfort Air Handler and Non communicating Air Conditioner orris e eE e a e E 62 iComfort Air Handler and
116. n the outdoor control Reconnect wire if dis connected 423 Moderate Outdoor Unit The inverter has detected a Control will lockout after 10 strikes within an hour To clear disconnect power to outdoor Critical circuit problem unit and restart In normal operation after outdoor control recognizes sensors the alarm will be sent if valid temperature reading is lost Compare liquid line sensor resistance to temperature Outdoor Unit The liquid line temperature resistance charts in unit installation instructions Replace sensor pack if necessary At 424 Moderate sensor has Aie Ai ned P the beginning of any configuration furnace or air handler control will detect the pres i ence of the sensor s If detected reading in range appropriate feature will be set as installed and shown in the iComfort Wi Fi thermostat About screen The alarm fault will clear upon configuration or sensing normal values Sna Ba eaa Outdoor ambient temperature is below system limit Control will attempt to run at lowest 425 Minor F allowed compressor speed to allow for proper oil return Automatically clears when out allow for proper oil retum due to low door ambient temperature rises above limit for more then 5 minutes ambient temperature After ten faults within one hour control will lockout To clear disconnect power to outdoor 426 Critical Outdoor Unit Excessive inverter alarms unit and restart Inverter alarms 12 to 14 and 53 do not count towards this lockout
117. ne meS cunng one cooing using approach and sub cooling temperatures Reset by putting outdoor unit control cycle As aresult the hermostat has in test mode or resetting low voltage power Unit pressure is above the upper limit System is shut down The high pressure f switch for HFC 410A will open at 590PSIG and close at 418PSIG Confirm that the 412 Moderate ae Re Unit The outdoor unit Pe system is properly charged with refrigerant Check condenser fan motor TXV in system will shut d kak door unit blower motor stuck reversing valve or clogged refrigerant filter Confirm y that the outdoor unit is clean The alarm clears after the pressure switch closes or a power reset Outdoor Unit The high pressure Open high pressure switch error count reached 5 strikes Check system charge 413 Critical switch has opened 5 times during one using approach and sub cooling temperatures Check outdoor fan operation Check cooling cycle As a result the thermo for dirt or debris blocking air flow to outdoor unit Reset by putting outdoor unit con stat has shutdown the outdoor unit trol in test mode or resetting low voltage power _ Discharge line temperature is gt 279 F Make sure coil is clean and airflow unob 414 Critical ee nit The disenarge line tem structed in and out of condenser Check system operating pressures and compare ne upper ii of 279 F to unit charging charts in installation manual Clears after discharge temperature is i lt 225 F
118. nections are successful internet router server Troubleshooting Wi Fi Connection The following terminology is used in this troubleshooting section Router Signal Strength RSSI RSSI is an indication of the signal strength of the Wi Fi router being received by the scanning device i e smart phone Therefore the higher the RSSI number or less negative in some devices the stronger the signal 802 11a g and n are wireless networking specification that extends throughput up to 130mbps using the 2 4 GHz band e internet Protocol Address IP address This is a numerical label assigned to each device e g computer printer thermostat participating in a computer network that uses the Internet Protocol for communication An IP address serves two principal functions host or network interface identification and location addressing Electromagnetic Interference Causing Poor Connectivity Locate both the thermostat and router away from other devices that could possibility interfere with wireless communications Some examples of other devices that could interfere are e Microwave ovens e Wireless Cameras e Portable phones and bases e Baby monitors Wireless speakers e Bluetooth devices Garage door openers Neighbor s wireless devices To eliminate a possible source of interference temporally disable any devices and see if Wi FI performance has improved Router Signal Strength RSSI The ideal signal
119. ng the next button The Edit and Test Airflow per Zone screen will appear Equipment Name Zone 2 Temp Reading Calibration Zone 3 Temp Reading Calibration 1 Zone 4 Temp Reading Calibration current value reset edit D Zone 2 Temp Reading Calibration Range is 5 to 5 F Default is 0 inc 1 9 39 am Aug 15 2012 set to of BO save c cancel EDIT AND TEST AIRFLOW PER ZONE Figure 20 Adjust Zone Temperature Reading Calibration Adjustment to all air flows are made either at the System Devices gt System screen or using the Edit and Test Airflow per Zone screen as illustrated here The following procedure is to adjust individual zone airflow CFM for Blower Circulation Cooling and Heating airflow The Maximum Airflow for the selected mode on the left is displayed at the top right of the screen The Assigned Airflow the sum of the selected airflow for each zone is displayed at the top right of the screen NOTE The airflow per zone in red must be selected and verified before continuing 1 Select the desired radio button option Blower Airflow A 2 Adjust airflow for a specific zone by pressing on the desired zone B Total maximum airflow for all zones in this example is a combined1250 CFM Minimum CFM per zone is 50 and maximum is 1250 3 Adjust airflow by using the up or down arrow to change the CFM C 4 Press start D to begin operation for that sp
120. ns To view all alerts present at any time press the alerts button System setup Diagnostics is complete figure 44B appears close it and the Select devices to view alerts screen figure 44A appears Use view cleared alerts to list previously active alerts that were cleared by the device or installer Until at least one alert has been cleared by the device or the installer the message There are no new alerts that require service will be displayed The first alert will be displayed in the alert screen figure 44B in order of 1 red alert icon 2 A yellow alert icon service A red alert icon identifies a system or device issue that can prevent the system from working properly or at all and if allowed to run could cause damage to the system The issue raised by the alert must be addressed and corrected before clearing the alert Press clear figure 44B to clear a red alert The alert will be stored in the cleared alerts file If an alert cannot be cleared revisit the alert issue and make repairs accordingly After all active alerts have been cleared only the back button remains and the alerts box shows No Alerts figure 45 Press back to return to the system and device alert screen figure 44A Page 40 VIEW CLEARED ALERTS A history of cleared alerts allows the installer to review cleared alerts This information can help diagnose problems Use the arrows to select either select all o
121. number on 25 CFM resolution Minimum Outdoor Unit Heating Stage as a percentage of High Heat Pump Airflow value is rounded up to the closest number on 25 CFM resolution All communicating Installer Parameters default CFM values based on DIP switch setting non communicating value are calculated using the CFM conversion tables and rounded up to closest number on 25 CFM resolution Table 7 System Devices gt Thermostat 25 1 2 HP blower 25 1 2 HP blower Humidifier present 25 1 HP blower Humidification Airflow system devices System To adjust a setting high about D Heat Pump light it then press Edit er Furnace CED Thermostat Thermostat a edit back next Press edit to change name up to 35 characters may be used Equipment Name Note Pressing the resetALL button will reset all custom parameter settings back to factory default Temp Reading Calibration 0 F 5 F to 5 F APF Humidity Reading Calibration 0 10 to 10 1 RH Table 8 System Devices gt Zoning Control system devices To adjust a setting high g about System light it then press Edit Heat Pump resetAll Furnace Thermostat ae Zoning Control te edit m back D M next D Parameter Name Default Min Max Incr Dependency Zone 2 Temp Reading Calibration Zoning Control Damper control module Zone 3 Temp Reading Calibration insta
122. o that heat strips if used information will be detected by the iComfor thermostat This must be done prior to powering up the system and thermostat 1 2 oO iComfort Wi Fi Configure air handler control AHC for auxiliary heat strips if used Wiring See Communicating System and optional accessories Wiring diagrams e 4 conductor thermostat wire from the iComfort Wi Fi thermostat to the air handler R i i C e 4 conductor thermostat wire from the air handler 5 On the thermostat go past the Add or remove non communicating equipment to the To adjust a setting screen Use the arrows to select Air Handler from system devices list press edit From this Air Handler screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When you change certain settings the system will prompt you to please view and save all red settings Use the arrows to select the red settings and press edit Either make changes or not but press save either way The red settings will go away after pressing save When all CFM settings are complete press the back button Press next DO NOT cut any option link on air handler control After the entire system is wired power up the system the terminal strip to the iComfort air conditioner R i i step to advance to the tests button 7 Test the system operation and confirm the system is electrically
123. ol system operation LOW BALANCE POINT If the outside temperature is below the programmed low balance point set by default at 25 F compressor operation is not allowed Since the heat pump is not as effective at a lower outdoor temperatures it may be more comfortable to use the auxiliary electric heat or the furnace in dual fuel systems it may be more economical to satisfy a demand for heat The low balance point options are from 20 F to the high balance point temperature The set point can be adjusted in 1 0 F steps HIGH BALANCE POINT If the outside temperature is above the programmed high balance point set by default at 50 F auxiliary electric heat operation or furnace operation in dual fuel system is not allowed This ensures that the lower cost heat pump operation will satisfy the heating demand rather that the more expensive auxiliary electric heat The high and low balance points will not lock out both compressor heat and auxiliary heat furnace at the same time iComfort Wi Fi Page 35 1 Staged Operations Dual fuel applications which include both a Heat Pump XP17 or XP21 only and a gas furnace will provide multiple stages of heating For example a two stage heat pump would deliver two stages of heat The gas furnace can add two to four more stages of heat Figure 42 flow chart illustrates Dual Fuel operation with Balance Points 2 Variable Capacity Modulating Operations Dual fuel applications whic
124. onds of inactivity the image will be displayed 7 Day Programmable Communicating Thermostat Accessing Installer Screens and Changing Equipment Parameters To access the installer screens after the unit has been placed in operation and the user home screen is displayed press the Lennox logo and hold for 5 seconds see figure 34 The system will access the installer screens A s indoor temperature indoor te is 41 ay rales tystem is i Wi Fi 9 39 am Aug 15 2012 K set 75 cool to 19 gt me Bl Heat to 30 enter away C cool 2 Figure 34 Enter Installation Setup Mode A message screen stating Qualified Lennox equipment installer warning screen appears Figure 35 Press yes to proceed no returns to the home screen RECONFIGURING SYSTEM WARNING The following screens are intended for use by qualified Lennox equipment installers only Do you want to proceed yes reset Figure 35 Qualified Lennox Equipment Installer Warning When pressing yes the thermostat s will search for communicating devices in the system When pressing no the thermostat s returns to the main screen When pressing reset the thermostat s resets all parameters to factory default searches for communicating equipment and erases all information concerning non communicating equipment previously stored in the thermostat After
125. ops all associated HVAC operations and thermostat has lost communication with waits for a heartbeat message from the unit that s not communicating The alarm the furnace air handler or outdoor unit fault clears after communication is re established for more than 3 minutes Thermostat Furnace Outdoor Unit Damper Control Module There is a There i trol hard bl Repl th trol if th bl t 7 hardware problem on either the Ther ere is a control hardware problem Replace the control if the problem prevents 125 Critical mostat furnace control board air hand Buon and is persistent The alarm fault is cleared 300 seconds after the fault ler control board or outdoor unit control 5 board Furnace Outdoor Unit There is an internal communication problem with There is an internal hardware problem on the control Typically the control will re set 126 Critical the furnace control board air handler itself Replace the control if the problem prevents operation and is persistent The control board or outdoor unit control alarm fault is cleared 300 seconds after the fault recovers board Air Handler Equipment Interface Configuration jumper s missing on control applicable in non communicating ap 130 Moderate Module An air handler configuration plications only Replace the jumper or put wire between terminals on control jumper is missing Cleared after jumper is connected 507343 01 table continued on next page Page 42
126. or this feature is disabled When enabled Max Defrost is always used if any of the following weather conditions are reported via the Internet to the thermostat e Rain light medium or heavy and outdoor temperature temperature is reported as less than 35 F e Sleet e Freezing rain Note This setting when enabled is always used regardless of day night or thermostat termination temperature setting in a total communicating system 507343 01 Example If the following conditions are true then the thermostat will direct the outdoor unit control to operate the outdoor unit in Max Defrost mode during this weather event e Defrost termination temperature is set at 50 F 70 F or 90 F in a full communicating system e Any of the exampled weather conditions are forecast Page 32 Automatic Max Defrost Defrost termination Defrost termination is fixed will vary DEFROST DEFROST TERMINATION TERMINATION SELECTION SELECTION 50 F 70 F or 90 F 50 F 70 F or 90 F Defrost runs with Defrost runs with Defrost runs with auto selected auto selected Normal Defrost termination termination Sequence termperature The temperature The Maximum time allowed minimum minimum for defrost is 14 termination termination minutes temperature is the temperature is jumper setting 90 F Defrost runs with Maximum Defrost Sequence Maximum time allowed for defrost is 19 minutes Maximum Defrost Sequence
127. ow any cooling equipment is not stuck ON Check accuracy of the thermostat temperature cooling operation to begin until it sensor Select heating system mode to heat the indoor space to above 40 F senses a temperature higher than 40 F Thermostat The thermostat has lost Indicated unif has not communicated with thermostat for more than 3 minutes Me communication with the furnace air 31 Critical handler or outdoor unit for more than 3 Check connections Ohm wires If fault persists then cycle power Fault clears after minutes communication is restored Indicated unit is resetting itself This event may occur during a power outage or power fluctuation in the system If persistent or if it coincides with the system opera ip tion then proceed with the following steps Check the power connections check the 32 Moderate Sue umae ee amp draw at the transformer the transformer maybe overloaded and check 24VAC 9 voltage at the DEVICE The alarm is only cleared by pressing the clear button on the Installer Alerts Tab If the fault persists after checking the connections replace the unit s control board Thermostat The thermostat does not know the capacity tonnage of the fur Indicated unit is missing the programmed unit capacity Go to ndicated unif and 34 Critical nace air handler or outdoor unit program the unit capacity manually See the unit IOM for programming instructions Please program the correct capacity of Remove powe
128. plete detail see the Air Handler installation instructions Reconfigure the iComfort system by entering the installer program and selecting the setup button and following the prompts High amp low balance points are enabled and adjusted under the installer section of the thermostat In the equipment button select System and press edit Scroll down to Balance Point Control and press edit and select Enabled and then save If an optional outdoor temperature sensor has been installed you may display the outdoor temperature on the home screen of the thermostat To turn on or off the Outdoor Temp Display From the Home screen press press for more area and select the HELP icon Press the user preferences box and scroll down to Outdoor Temp Display Press the modify button and use the up down arrows to select On or Off and then press the save button Press done to return to the home screen iComfort Wi Fi Page 63 7 Day Programmable Communicating Thermostat Partial iComfort System iComfort Equipment Interface Module The iComfort Equipment Interface Module EIM can be 4 On the thermostat go past the Add or remove configured in the following setups 507343 01 iComfort Wi Fi iComfort Equipment Interface Module with either a non communicating conventional indoor unit and iComfort outdoor unit iComfort Wi Fi iComfort Equipment Interface Module with either a non communicating conventional indoor unit and out
129. pump heating iComfort Wi Fi Page 37 From Modulating Furnace to Modulating Heat Pump The thermostat uses step change gains for the first 20 minutes and a starting heat rate at least 10 higher than the minimum rate From Staged Furnace to Modulating Heat Pump Starts with 70 demand Modulating Gas Furnace e The installer sets the maximums heating CFM required in each zone The sum of all the active zones CFMs allows the thermostat to interpolate the furnace heating rate This correlates to the set zone CFM by using the high heating airflow and low heating airflow parameter values from the furnace This is used as the starting point for maintaining the DAS temperature that has been set and will be used each time the blower CFM changes its value e If the DAS temperature is lower than the target the thermostat increases the demand by 5 every two minutes until the DAS is within the target window If the DAS is higher than the target the thermostat lowers the demand by 5 every two minutes until the DAS temperature is within the target window 7 Day Programmable Communicating Thermostat Gas Heat Control Mode Differential Starting firing rate as determined by variable capacity algorithm 35 to Differential Continue at starting firing rate Differential less than 3rd stag gt differential 2 Increase firing rate to calculated 2nd stage firing rate Differential less than 3rd stag gt differential
130. r check an item from the list and then press view cleared alerts Then scroll through the alerts using the next button Press back to return to the alerts screen figure 44A page 40 equipment ti te tests l L setup 3 No Alerts 9 39 am Aug 15 2012 Figure 45 Cleared Alert Confirmation Page 40 Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button aer Priority Alert Text Steps to clear The room thermostat has found an unknown device on the system 10 Critical Thermostat The thermostat has found An unknown device is seen by the room thermostat in or outside of configuration mica an unknown device on the system mode Clear by reconfiguring the system Check all connections and cycle system power If problem persists clear by recon 11 Critical Thermostat The thermostat cannot figuring the system Press the setup tab press start and press confirm If problem find a previously installed unit persists then check all DEVICE connections to make sure they are iCom fort compatible Thermostat did not find an Indoor Unit Make sure there is an iComfort indoor unit 12 Critical Thermostat The mermosta cannot on the system Check R i i and C connections ohm wires and cycle pow
131. r to thermostat before programming the unit control board Once the furnace air handler or outdoor programming is complete reconnect thermostat wires and reconfigure system unit Run the system in diagnostic mode and verify that it matches actual equipment Thermostat The system has been operation Check for other alarms codes that may be preventing the system from p f operating as expected 36 Critical heating for at least 19 minutes without Step 1 Check all heating equipment to determine cause of heating demand 9 Step 2 Recycle power System will clear code when it detects condition has cleared Run the system in diagnostic mode and verify that it matches actual equipment Thermostat The system has been operation Check for other alarms codes that may be preventing the system from Fh A operating as expected 37 Critical poling Toat least 19 minutes without Step 1 Check all cooling equipment to determine cause of cooling demand 9 Step 2 Recycle power System will clear code when it detects condition has cleared Run the system in diagnostic mode and verify that it matches actual equipment Thermostat The system has not been operation Check for other alarms codes that may be preventing the system from 38 Critical able to turn on the heating for more operating as expected than 45 minutes The system will go off Step 1 Check all heating equipment to determine cause line for 60 minutes and try again Step 2 Recycle power Syste
132. rammable Communicating Thermostat DEHUMIDIFICATION HOW IT WORKS Remember that the humidification only operates while in the heating mode and dehumidification only operates while in the cooling mode OFF MEDIUM AND HIGH These modes allow user control of relative humidity between 40 and 60 RH These conditions must be met for either mode to operate e de humidification mode has been enabled and e the unit is in COOL mode and e de humidification demand exists OV present at H and MEDIUM mode also requires presence of cooling demand Y for HP heat or W for gas heat W may be energized with G de energized HIGH mode requires the system to be in the cooling mode and to of had a cooling call prior to the dehumidification call Their does not need a cooling call to be present to bring on Humid dehumidification This mode can over cool the space by 2 F while trying to satisfying the dehumidification demand Humiditrol or Auxiliary Dehumidifier mode requires NOTE Systems using iComfort and a dehumidifier Dehum jumper on furnace air handler control does not need to be cut when using with a iComfort Wi Fi thermostat e Wi Fi is operational or outdoor sensor is installed and set up e Dehumidification has been enabled on installer settings and e the unit is in COOL mode or if in AUTO at least one thermostat cooling call made prior to the dehumidification demand and e adehumidification demand exists
133. rget Supply Air Temp for Gas Electric Heating 100 F 100 to 130 F 5 F Zoning Target Supply Air Temp for HP Heating 90 F 85 to 110 F 1 F Zoning Supply Air Temp Limit for Cooling 40 F 35 to 45 F 2 F Zoning Supply Air Temp Limit for Gas Electric Heating 140 F 140 to 160 F 5 F Number of stages shown in thermostat is dependent on equipment that is installed Electric heat will bring on 2 elements at a time if available Lock in 2nd stage HP by Outdoor Temp Off aes 0 pee a ie a HP Heating Lockout Time 120 Minutes Range is 60 to 240 minutes 60 Min Zoning Minimum Zone Run Time 120 Seconds Range is 90 to 600 seconds 30 Sec Zone 1 First Stage Differential 1 0 F 0 5 to 3 0 F 0 5 F Zone 2 First Stage Differential 1 0 F 0 5 to 3 0 F 0 5 F Zone 3 First Stage Differential 1 0 F 0 5 to 3 0 F 0 5 F Zone 4 First Stage Differential 1 0 F 0 5 to 3 0 F 0 5 F Zone 1 Continuous Blower CFM Zone 2 Continuous Blower CFM Zone 3 Continuous Blower CFM Zone 4 Continuous Blower CFM Zone 1 Cooling CFM Zone 2 Cooling CFM Zone 3 Cooling CFM Zone 4 Cooling CFM Zone 1 Heating CFM Zone 2 Heating CFM Zone 3 Heating CFM Zone 4 Heating CFM To be determine by equipment capacity iComfort Wi Fi Page 9 7 Day Programmable Communicating Thermostat Table 3 System Devices gt Air Conditioner system devices S F T ystem urnace hermostat
134. rmostat is reading wai Z 702 Moderate indoor temperatures below the pre pro ee to clear warm thermostat adjust set point Replace thermo grammed limit i 703 Moderate iein Ma e a Recalibrate thermostat to clear adjust set point Replace thermostat if needed table continued on next page iComfort Wi Fi Page 49 7 Day Programmable Communicating Thermostat Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button Table 10 Alert Codes and Troubleshooting Alert Code Priority Alert Text Steps to clear Thermostat The thermostat is reading indoor humidity levels above the pre programmed limit Thermostat The thermostat is reading indoor humidity levels below the pre programmed limit 704 Moderate Recalibrate thermostat to clear Replace thermostat if needed 705 Moderate Recalibrate thermostat to clear Replace thermostat if needed Ohm reading between i and i anywhere on the RSBus with supply power off should be between 70 and 90 ohms If above 90 ohms check and repair wiring splices or other wiring defects that may be causing the excessive resistance If less than 70 ohms check for shorted wires Ohm The ohm reading in the system is either Check too high or too low HOMEOWNER SERVICE ALERT CODES Numer Vue Number Vas Number vane
135. ronment default is ON HEATING MODE XP25 ONLY CLIMATE IQ This technology optimizes dehumidification settings for specific climates to improve home comfort during cooling or heating operations Two climate settings are available Comfort The system reduces indoor airflow in creasing supply air temperature Normal Standard system operation 507343 01 Figure 13 Dehumidification iComfort System Controls Page 16 DEHUMIDIFICATION HOW IT WORKS This is applicable only to the XC17 XP17 XP17N XC21 XP21 and XP21N models DRY MODERATE AND HUMID These modes allow user control of relative humidity between 40 and 60 RH These conditions must be met for either Moderate or Humid modes to operate e dehumidification mode has been enabled and e the unit is in COOL mode and e dehumidification demand exists OV present at H and DRY mode if off with no dehumidification control MODERATE mode requires presence of cooling demand Y for HP heat HUMID mode requires the system to be in the cooling mode and to of had a cooling call prior to the dehumidification call Their does not need a cooling call to be present to bring on Humid dehumidification This mode can over cool the space by 2 degrees while trying to satisfying the dehumidification demand Humiditrol or Auxiliary Dehumidifier mode requires NOTE Systems using iComfor and a dehumidifier Dehum jumper on f
136. rovides 80 of full capacity 3rd stage provides 100 of full capacity e Four stage heat First stage provides 35 or 40 of full capacity second stage provides 60 of full capacity 3rd stage provides 80 of full capacity 4th stage provides 100 of full capacity LOAD TRACKING VARIABLE CAPACITY FAQS SLP98V ONLY What is Load tracking Variable Capacity When an SLP98 Furnace is connected to an iComfort Wi Fi thermostat the thermostat takes complete charge of the variable capacity staging of the iComfort Wi Fi Page 39 furnace Load tracking Variable Capacity is only available with iComfort Wi Fi thermostats How is Load tracking Variable Capacity different from Variable Capacity Load tracking Variable Capacity will smoothly track the load sensible temperature changes up and down and adjust the furnace heating rate both ways Variable capacity only tracks the load upward rising temperature Variable capacity uses the thermostats stage differentials but not stage timers LVC disregards both stage differentials and stage timers What makes Load tracking Variable Capacity work With iComfort Load tracking Variable Capacity the thermostat uses a Proportional Integral Algorithm PIA to control firing rates of the furnace The algorithm in the Load tracking Variable Capacity provides much more precise control over the furnace than the Variable Capacity algorithm Interesting Points about the Proportional Integral Algori
137. s Termination temperature set on outdoor control is 50 F 70 F 90 F Defrost for 14 minute maximum without the coil temperature sensor input reaching termination temperature Termination temperature set on outdoor control is MAX Defrost for 19 minute maximum or coil temperature sensor reached 110 F Calibration attempted P unit running in heat mode ee wee wer Calibration Figure 41 Demand Defrost Automatic Max Defrost 507343 01 Page 34 Heat Pump Dual Fuel Dual Fuel Tempering and Balance Points IMPORTANT The Balance Points feature requires that a DUAL FUEL APPLICATIONS sensed outdoor temperature is provided to the thermostat This The following information is applicable to communicating can be either a connection to Wi Fi for local temperature systems only information or a connection to an outdoor sensor included in all communicating iComfort heat pumps optional outdoor temperature sensor X2658 for non communicating heat pumps BALANCE POINTS HEAT PUMP The LOW and HIGH set points may be controlled by theiComfort Wi Fi thermostat using the LOW and HIGH Balance Points feature To enable the Balance Points feature go to the installer section equipment button Scroll down to the System screen select edit and scroll down to Balance Points Controls Use arrows to select Enabled and then press save See figure 42 for a simplified explanation of how balance points contr
138. s to run screen High HP Airflow sotto KEEGAN appears either run tests as before or press skip Continuous Indoor Blo _ i 325 CFM i tests Heating Indoor Blower k o 9 39 am Aug 1 save cancel Figure 9 Edit Equipment Details iComfort UNIT CONFIGURABLE SETTINGS The following tables list the system devices settings available from the installer setup screens Table 2 System Devices gt System system devices To adjust a setting C about highlight it then p press Edit resetal System E edit 9 39 am Aug 15 2012 bA ck next back d Parameter Name Default Parameter Value Setting Increment Press edit to change name up to 35 charac ters may be used Heat Pump Furnace Thermostat Equipment Name Note Pressing the resetALL button will re _ set all custom parameter settings back to factory default Filter 1 Timer Selection Calendar Time Calendar Time Run Time Filter 2 Timer Selection Calendar Time Calendar Time Run Time UV Bulb Timer Selection Calendar Time Calendar Time Run Time Humidifier Pad Timer Selection Calendar Time Calendar Time Run Time PureAir Timer Selection Calendar Time Calendar Time Run Time Smooth Setback Recovery Enabled Enabled Disabled Electric Heat Control Mode Standard Standard Evenheat EvenHeat Discharge Temp 85 F 85 F to 130
139. step to advance to the tests button Using up down arrows select the test options individually if so desired you may choose to TEST ALL and press the select button If selecting individual tests repeat until you have selected all you intend to run Press the start button Confirm the air conditioning unit is electrically energized and operational Press done Exit the installer setup mode by selecting the EXIT button e An outdoor temperature sensor is provided in an iComfort air conditioning unit To display the outdoor temperature on the home screen of the thermostat you must turn on or off the Outdoor Temp Display From the Home screen press press for more area and select the HELP icon Press the user preferences box and scroll down to Outdoor Temp Display Press the modify button and use the up down arrows to select On or Off and then press the save button Press done to return to the Home screen e Turn the Indoor Humidity Display on and off in a similar manner as above iComfort Wi Fi Page 57 7 Day Programmable Communicating Thermostat Complete iComfort Systems Furnace and HP Unit Dual fuel Dual fuel system using an iComfort gas furnace G71MPP EL296V SLP98 SL280 with an iComfort heat pump XP17 XP17N XP21 XP21N and XP25 only 6 down arrow to select Enabled and press save High and Low Balance Points will appear in red Complete Balance Point Control by editing the High
140. t then press edit Dehumidifier current value Electronic Air Cleaner 2a Not Installed Select one Humidifier Not Installed 3a Bypass 24VAC Humidifier Options 3b D DI available for save cancel CBX32MV and CBX40UHV non communicating device list to add remove adjust a device o Dehumidifier current value Electronic Air Cleaner XXXXXXXXXXXXXXXXXXXXXXXT system devices Add or Remove Non l System paaanen S System equipment Heat Pump Furnace Thermostat Bypass 24VAC ment back next 9 39 am Aug 15 2012 Figure 7 Add Non Communicating Device Humidifier 507343 01 Page 6 NON COMMUNICATING EQUIPMENT ADDING HUMIDITROL OR AUXILIARY DEHUMIDIFIER Before adding a dehumidifier be sure that e the dehumidifier is wired to the furnace or air handler control as shown on the optional accessories wiring diagram e the entire system is wired powered up and the ther mostat has detected the system s installed communi cating devices and you are at the Add or Remove Non communicating equipment screen equipment Furnace system devices Add or Remove Q C yes Non communicating to add remove adjust a device non communicating device list A select it then press edit Humidifier current value Dehumidifier Electronic Air Cleaner Not Insta
141. t will recycle the demand 2 replace inverter If condition is detected outdoor unit will stop compressor and fan Anti short cycle is initiated If condition occurs 10 times within an hour system will lockout To clear discon nect power to outdoor unit and restart Error occurs when PFC detects a over current condition of 100A peak If condition is de tected outdoor unit will stop compressor and fan Anti short cycle is initiated If condi tion occurs 10 times within an hour system will lockout To clear disconnect power to outdoor unit and restart Error occurs when the DC link capacitor voltage is greater than 480VDC If condition is detected outdoor unit will stop compressor and fan Anti short cycle is initiated If con dition occurs 10 times within an hour system will lockout System will stop To clear dis connect power to outdoor unit and restart Error occurs when compressor peak phase current is greater than 28A Inverter will is sue code 14 first and slow down to try to reduce the current If the current remains high outdoor unit will stop compressor and fan Anti short cycle is initiated If condition oc curs 5 times within an hour system will lockout To clear disconnect power to outdoor unit and restart Outdoor control has lost communications with the inverter for greater than 3 minutes Outdoor control will stop all compressor demands recycle power to the inverter by de energizing the contactor for 2 m
142. t Time and Date press edit to proceed to the Set current time and date screen system settings Daylight Saving Time Circulate Fan ON Time System Name Dealer Number Dealer Name Dealer Address Dealer Phone Dealer Email To adjust a setting highlight it then press edit current value 9 39 am Aug 15 2012 back D next 9 39 am Aug 15 2012 iComfort Wi Fi Page 3 Figure 3 View Edit Time and Date When Time and Date screen appears enter the correct date as follows e Use the left and right arrows to change the month and year e Touch a day of the month to select it e Press on the hour or minute up down arrows appear to allow change Touch the am pm field to toggle it between am and pm e When the correct date and time is set press save to save settings and return to previous settings screen Touch next to continue to next screen system settings January 2012 SM T WT F S G Ji jt 3 4 JI 5 6 jC 7 09 39 am D a 10 11 12 13 14 15 16 47 48 J 19 20 21 22 GE 24 25 26 27 28 29 30 a1 9 39 am Aug 15 2012 E save Figure 4 Set Current Time and Date CIRCULATE FAN ON TIME SETTING NOTE If the circulate fan mode is on a timer is set to measure all the time that the fan is blowing regardless if it is running to deliver heating or cooling or just
143. t and thermostats Check R i l C wires for open shorts Temperature or humidity calibra tion does not respond to calibra tion changes Temperature Humidity calibra tion changes will change dis play 1 F or 1 RH every 3 minutes Allow the system to stabilize and complete the calibration mode due to the time delay A 5 F calibration change will take 15 minutes to calibrate the display The installer adjustable settings used to configure the system are not listed in the equipment button under the Thermostat only Temp Reading Calibration and Humidity Reading Calibration are listed as menu items The adjustable system configur ation settings are listed in the equipment button under Sys tem In the installer program select the equipment button and choose System from system device and press edit Over 25 installer adjustable settings are provided including bal ance point humidification control Dehumidification modes stage differentials and delays During the cooling mode the dis played air volume on the indoor control is substantially lower than expected The system may be following the cooling ramping profile or may be in the Dehumidification mode During the default cooling ramping profile the blower will run for 7 5 minutes at 82 of the cooling air volume If the cooling ramping profile is selected the system will ramp to 100 after 7 5 minutes The dehumidifi
144. t communication voltage source of noise close to the system Generally this is a self recoverable with the rest of the system error oF F This alarm code may appear during a brownout Line voltage is below its designed 110 Critical Furnace The line voltage is too low operating value Check and correct the power line voltage si The unit is reporting that its power line and neutral are reversed Turn off the power 111 Critical F umado T he line power voltage wiring to the system and correct the line power voltage wiring System resumes normal operation 5 seconds after fault recovered Furnace The reporting device cannot Provide 7 i proper earth ground to the equipment System resumes normal operation 5 112 Critical find earth ground The thermostat will seconds after fault recovered shut down the system Line voltage high voltage higher than nameplate rating Provide power voltage 113 Critical Furnace The line voltage is too high within proper range System resumes normal operation 5 seconds after fault re covered oe Aa hPa ost Equipment This alarm code may indicate transformer overloading Check the voltage and line 114 Critical Module There is a fre niche distortion Power frequency Check the generator operating frequency if the system is running roblem with the Baye the furnace on back up power Correct voltage and frequency problems System resumes nor p air handler P mal operation 5 seconds after fault recovered E a
145. tected by allowing the unit to run for 90 seconds before checking sensor resist a haath the outdoor unit control hit not ance If the sensor resistance is not within range after 90 seconds the board will erform any defrost temperin count one fault After 5 faults the board will lock out Check for proper sensor read P y pering ing and attachment to line Replace if out of specifications The damper control module detects open or shorted discharge sensor or temperat Damper Control Module The damper ure that is out of discharge sensor range Check the resistance of the discharge control discharge air temperature sensor and compare to temperature resistance chart replace if needed Reset by 417 Moderate sensor is either open short circuited or replacing the discharge sensor This fault is detected by allowing the unit to run for Critical the temperature is out of sensor range 90 seconds before checking discharge sensor resistance If the discharge sensor As a result the outdoor unit control will resistance is not within range after 90 seconds the control will count one fault After not perform any defrost tempering 5 faults the control will lock out Check for proper sensor reading and attachment to line The alarm clears after a power reset W terminal is energized while in cooling mode Possible cause may be a stuck closed relay on the control or something external to the control that is energizing W 418 Moderate Outdoor Unit There is a fault
146. the following will occur e Then system will continue to fulfill the demand from zone 1 until satisfied or a maximum time of 20 minutes has occurred e If after 20 minutes the system is still operating based on satisfying the heating demand from zone 1 the system will terminate that demand The system will shut system down for five 5 minutes This will allow for system temperatures and operating pressures to stabilize e After a five minute delay the system will begin operations to satisfied the cooling demand from zone 2 The system will continue to operate in this matter each time it receives a zone call that is opposite of the current mode of operation heating or cooling DAMPER OPERATION Cooling Operation Conventional Heat Cool and Heat Pump Systems When a in zone thermostat makes a demand for cooling the zone damper opens and the cooling equipment begins operating Dampers will closed for any zone with no cooling demand ZONE CONTROL ADJUSTING SYSTEM DEVICES Cooling demand is terminated when 1 All zone demands for cooling are terminated 2 The demand has exceeded the heat cool changeover time limit 20 minutes while a heat demand exists When cooling demand is terminated a 5 minute minimum off time delay is initiated Second stage cooling is energized when the discharge air temperature is 7 F higher than the set point of the cooling staging temperature Heating Operation Conventional Heat
147. thm PIA The further temperature is from the current set point the higher PIA sets the heating rate e The longer away from a programmed set point the higher the heating rate e f needed PIA will turn heating on and off in short cycles when there is a heat demand that is lower than the lowest the furnace can provide e Ifthe heat demand is higher than the minimum the furnace can provide the furnace will run without shutting off e As the room temperature rises nearer the set point the heating rate will decrease e As the room temperature falls further away from the set point the heating rate will increase e The stage differentials have no effect when running the PIA e The second stage timers have no effect when running the PIA 7 Day Programmable Communicating Thermostat Alert Codes and Troubleshooting Press alerts if you need to run to see any alerts that may present or to view alerts that have been cleared equipment alerts _ Giggnestics setup J E tests D System Devices Oo System system and device alerts 4 Furnace O Thermostat cece deselect an View active H cleared geee EXIT System setup Diagnostics is complete a setup a g tests D equipment alert description C active alerts ALERT 1 of 5 Minor Alert Code 117 System reports Furnace Poor Ground detected Latest Occurrence 10 25 2011 C C
148. to the system but the unit only runs in 2nd stage The W915 2 Stage Compr clippable option link on the fur nace or air handler control must be cut when used with a non communicating 2 stage outdoor unit Cut the W915 2 Stage Compr option link on the furnace or air handler control Transfer the model and serial numbers and system settings to a replacement control The iComfort system is cap able of copying settings from the previous configuration to the new compatible device control found Reconfigure the system using the installer program and select the setup button The system will go through the system discovery pro cess The thermostat will display missing devices old control and found compatible devices new control Press the next button to accept the new device and copy the settings Thermostat will dis play Settings were copied after successfully copying the information to the new control See section title Reconfiguring a system in this manual Determine the actual Software version of the thermostat or one of the iComfort unit controls iComfor software is stored in the control and can be re trieved From the home screen click the right arrow then click service info button then click the thermostat info button display shows model amp serial numbers and hardware software Wi Fi revision information The iComfort thermostat shows an error code related to th
149. uipment OGD 3 non communicating device list to add remove adjust a device select it then press edit To add or remove an outdoor unit that is not iComfort you must be at the Add or Remove Non communicating equip ment screen 1 Press the yes button on this screen see 1 2 In the non communicating device list screen use the arrows 2a to highlight Outdoor Unit Type and press edit 2b 3 Touch one of the radio buttons 3a to select a 1 or 2 Stage AC Unit or a 1 or 2 Stage HP Unit press save 3b 4 Use arrows 4a to highlight any red colored text in the device list e g select Outdoor Unit Capacity text turns white Press edit 4b 5 Use arrows 5a to make changes press save 5b Change other red settings if present using a similar process NOTE If the defaults are correct you do not have to make any changes but you must press save 5b When all red text is gone the back button will appear press it to return to the Add or Remove Non communicating equipment screen 1 Outdoor Uit pe A current value Piumidiner Not Installed Dehumidifier Outdoor Unit Type m Select one 1 non communicating device list Not Installed 1 Stage A C Unit Outdoor Unit Type 2 Stage A C Unit 1 Stage HP Unit KOTC COANE E 2 Stage HP Unit Humidifier Dehumidifier save 9 39 am Aug 15 2012 to add remove adjust a
150. ult is 45 inc 1 set to 6 42 setting screen Figure 12 Complete iComfort System Devices Dehumidification Settings FEATURE SCREEN DEHUMIDIFICATION SETTINGS From the Main Screen press the right arrow icon to go the the Features screen From the Features screen select system settings Touch the ClimatelQ setting button Available options when selected are selection for DRY MODERATE and HUMID Selecting HUMID bring on the set to button When you touch the set to button the arrows appear allowing you to change to the desired dehumidifier percentage setting COOLING MODE CLIMATE IQ Three climate settings are available Dry The system supplies higher indoor airflow at all com pressor capacities increasing efficiency by operating at a higher sensible to total ratio Moderate The system supplies indoor airflow that balances efficiency and comfort Humid The system supplies lower indoor airflow at all com pressor capacities improving humidity removal by operating at a lower sensible to total ratio SYSTEM SETTINGS Appears only when heat pump is present i 0 ii humidifier heating humidifi ClimatelQ i mode pirg 3 5 setting 4 0 display COMFORT set to MOD set to Wi Fi J humidification settings default is ON 9 39 am Aug 15 2012 De humidification settings default is DRY Select the humidity level that matches your envi
151. updates are available they will immediately start downloading and update the thermostat The thermostat will reboot itself after the update is completed This auto update feature can be disabled by pressing the firmware update button to toggle to OFF but is not recommended NOTE Firmware updates will not affect installer or user thermostat settings Both will be retained after the update WI FI SETTINGS connection Wi Fi APS thermostat status enabled connected registered press to change mo tos see press to enable press to chang cO atus disable Wi Fi wireless networ thermostat registration firmware update auto press to search for new update NOTE If any downloads are available for the thermostat they will start downlo amp ding right away When new firmware is being downloaded or when Gelaskins are being installed the thermostat screen will temporarily go blank and running units may cease operation while the system is being reset to accommodate the new changes This is normal and can last a couple minutes Figure 32 Registration for Online Access Page 26 Account Registration for Server LENNOX icomfort Registration Create an Account I Figure 33 Registration Screen NOTE This following information is customer setup instructions and is shown here to allow the installer to help walk the customer through the setup process After registering through your iCo
152. urnace air handler control does not need to be cut when using with a iComfort Wi Fi thermostat e dehumidification has been enabled on installer settings and e the unit is in COOL mode or if in AUTO and at least one thermostat cooling call made prior to the dehumidification demand and adehumidification demand exists RH above set point and outdoor temperature is below 95 F and indoor temperature above 65 F Humiditrol only e MAX adj Indoor temp gt 2 F above heating set point 3 MID adj Indoor temp gt HEAT setpoint COOL setpoint 2 MIN adj Indoor temp gt 2 F below cooling set point iComfort Wi Fi Page 17 7 Day Programmable Communicating Thermostat SYSTEM DEVICES SCREEN HUMIDIFICATION CONTROL MODE Pre adjustment REQUIREMENTS System Devices To adjust a setting highlight it 1st the required devices outdoor unit and humidifier has a Pe Edit been installed see page 6 ir Conditioner yptem ced a C avout a you pressed next at the Add or Remove screen see Thermostat 1a gt page Power 120VAC Humidifier KOS edt Configure the device as follows ii mef Ne eetcontrol Mode 1 In the system devices list use the arrows 1a to highlight 2nd Stage Differential CA System Press edit 1 b Staged Delay Timers a cgfrent valho 2 In the System list use the arrows 2a to highlight SRE POE 2a
153. use low fire pressure switch did not close in the low fire pressure switch did not allowed time No action is needed close in the allowed time table continued on next page iComfort Wi Fi Page 43 7 Day Programmable Communicating Thermostat Table 10 Alert Codes and Troubleshooting Critical alerts are displayed on Home user screen in the Homeowner alert button and in the Installer alert button Minor and Moderate alerts are found only in the In staller alert button arr Priority Alert Text Steps to clear Check micro amperes of the flame sensor using thermostat diagnostics Clean or 240 Moderate tumace The furnace flame current is replace the flame sensor Measure voltage of neutral to ground to ensure good unit ground The alarm clears after a proper micro amp reading has been sensed 241 Critical Furnace The furnace flame is going Shut off gas Check for a gas valve leak Replace the gas valve if needed The M out while the furnace is heating alarm fault will clear when a heat call ends successfully Check for proper firing rate on furnace Ensure there is no blockage in the furnace 250 Moderate Furnace The furnace primary limit and the duct work Check for proper air flow If limit switch is not closed within 3 switch is open minutes the unit will go into 1 hour Watchguard mode The alarm fault will clear when a heat call ends successfully 252 Moderate Furna
154. vated Heat Cool Stages Locked In The factory default setting is disabled heat cool stages are turned off separately If changed to enabled heat cool stages are turned off together Scroll to Heat Cool Stages Locked In press edit Use arrows to select between Disabled or Enabled Press save Lock In Second Stage HP by Outdoor Temperature default Off heat pump second stage operates normally Use this setting to lock in the second stage compressor when the outdoor temperature is at or less than the LOCK TEMP set point Scroll to Lock In Second Stage HP by Outdoor Temperature press edit Use arrows to select a temperature between 40 F and 55 F Press save 7 Day Programmable Communicating Thermostat Smooth Setback Recovery SSR SSR is an algorithm designed to smoothly reach a occupied program schedule set point The algorithm looks 2 hours ahead for the occupied program schedule period s set point If the occupied set point requires the system to turn on present temperature below the heat set point or above the cool set point then SSR will calculate a new set point Once initiated SSR monitors the change in room temperature and calculates a new set point every 30 seconds Then SSR provides this new set point for the heating and cooling algorithms the new set point will be displayed on the User Interface SSR RULES 1 SSR is enabled when Smooth Setback Recovery is set to enabled and the program schedule
155. ve non communicating devices to the To adjust a setting screen Select System from the device list using the up down arrows and press the edit button Select Balance Point Control if outdoor sensor is installed and press edit Use the down arrow to select Enabled and press save High and Low Balance Points will appear in red Complete Balance Point Control by editing the High and Low Balance Points It is not necessary to change the defaults but you must save each setting The red settings will go away after pressing save Press the back button to return to the adjust screen Use the arrows to select Air Handler from system devices list Press edit From this Air Handler screen you will have access to the various airflow settings Set the system air volumes according the needs of the home When all CFM settings are complete press the back button Address any red settings as described in steps 8 and 9 Press next step to advance to the tests button Test the system operation and confirm the system is electrically energized and operational Particularly test the heat strips when used to insure the auxiliary stages operate as designed Press done Exit the installer setup mode by selecting the EXIT button If the thermostat System Setting does not offer a choice for emerg heat and or the electric heat will not function the electric heat has not been configured Configure the electric heat as described on Page 56 or for com
156. x Defrost 1 Defrost Auto can be set to either ON or OFF Factory setting is OFF Note If the jumper is missing the default is OFF 2 Defrost Auto is set to OFF the defrost cycle will run and terminate based on Defrost Termination Temperature setting 3 Defrost Auto is set to ON the defrost termination will be determined based on the following rules A The first defrost after the unit is powered up or the first defrost after cooling call will terminate based on the Defrost Termination Temperature setting B The accumulated heating run time between defrost cycles Ifthe heating run time between defrost cycles is less than 50 minutes the defrost termination iComfort Wi Fi Page 31 C temperature will be increased for the next defrost cycle based on the current termination setting If the current termination setting is 50 F or 70 F then the next defrost termination will be 90 F If the Defrost Termination Temperature setting is set at 90 F or MAX the next defrost cycle will terminate at the MAX setting If the heating run time between defrosts is longer than 1 hour for 2 consecutive heating cycles and the defrost termination temperature is set at 50 F 70 F or 90 F then the defrost control will follow the Defrost Termination Temperature setting during the next defrost cycle If the Defrost Termination Temperature setting is set to MAX then the next defrost termination temperature will be decre
157. y W out terminal when it should not be energized Solution Disconnect any wiring from the put circuit W terminal If 24 volts is still on the terminal then it is a stuck relay If the 24 volts disappears then there is a need to check any of the wires hooked up to the W ter minal oudon ani Te A output on ne The W output code E418 on the outdoor unit has reported more than 5 strikes As 419 Critical errors As a result tne austen has a result the system has shut down the outdoor unit Disconnect thermostat lines shutdown the outdoor Unit from W and verify 24VAC on the W If 24VAC is present replace the control on ae Equipment interface Mod Defrost cycle lasts longer than 20 minutes Check heat pump operation Cleared 420 Critical ule The heat pump defrost cycle has when W1 signal is removed Applicable only in communicating mode with non com taken more than 20 minutes to com inati plete municating heat pump Outdoor Unit The W output terminal 421 Critical on ne outdoor unit is not wired cor Voltage sensed on W output terminal when Y1 out is deactivated rectly Check condenser fan motor TXV indoor unit blower motor stuck reversing valve or clogged refrigerant filter Automatically clears when error is corrected 422 Moderate Outdoor Unit Compressor top cap switch exceeding thermal limit XC XP25 Check to ensure that one of the wires from the top cap switch has not been disconnected from one of the TP terminals o

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