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506052−01 11/09

Page 4

icomfort

t

Technical Description

The 24VAC icomfort

thermostat stores system parameters and set-

tings in a nonvolatile memory (i.e., it retains data when electrical power
fails or is turned off). The thermostat (see figure 1) also:

includes on-board help screens,

supports heat pumps or non−heat pump units, with up to 4 stage
heat / 2 stage compressor operation. (2 stages of heat pump heat-
ing and 2 stages of auxiliary backup heat are provided. Also, 2
stages of emergency heat are provided),

supports Indoor Air Quality with time-based notification of consum-
ables including media filters, UVC bulbs, humidifier pads, and
PureAir

catalyst service / replacement,

supports variable capacity / multistage heat/cool, universal com-
patibility (gas/electric/heat pump/ac), and is dual fuel capable with
two balance points.

Important

Always use correct software version as recommended for replacement
configuration (discovery).

Connections to non communication outdoor units and all accessories is
described in the Quick−Start Installation guide. (Wiring diagrams are also
shown beginning on Page 36.)

Thermostat
connections

RSBUS

Minimum wire size is
18 gauge

icomfort

Outdoor Units Control

icomfort

Furnace Control

icomfort

Air Handler Control

External Sensors − outdoor temperature and humidity
Humidify control
Dehumidify control

R I+ I − C

Maximum total length
of all connections on
the RSBus is limited
to 1500ft.

Figure 1. icomfort thermostat system

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Содержание icomfort

Страница 1: ...een Programmable Communicating Thermostat CONTROLS 506052 01 11 09 Shipping and Packing List1 1 icomfort Touch Screen Communicating 7 day Programmable Thermostat 6 Mounting Screws 6 Wall Anchors 1 each Installation Quick Start Guide Installer s System Setup Guide Homeowner sManual Warranty card Warranty Audit tag Litho U S A ...

Страница 2: ...ns 31 Wiring Diagrams 36 WARNING Always turn off power at the main power source by switching the circuit breaker to the OFF position before installing or removing this thermostat All wiring must conform to local and national building and electri cal codes and ordinances Do not switch system to cool if the outdoor temperature is below 45 F 7 C This can damage the cooling system CAUTION This is a 24...

Страница 3: ...n of blower heat strips and monitors all safety features in the unit HP Control Defrost Control UC Communicating defrost control UC controls low and high speed compressor operation defrost opera tions fan motor and reversing valve and monitors all safety features in the unit AC Control Communicating air conditioning control AC controls low and high speed compressor operation fan motor operation an...

Страница 4: ...ier pads and PureAir catalyst service replacement supports variable capacity multistage heat cool universal com patibility gas electric heat pump ac and is dual fuel capable with two balance points Important Always use correct software version as recommended for replacement configuration discovery Connectionsto non communication outdoor units and all accessories is described in the Quick Start Ins...

Страница 5: ...ngeover mode permits control of heating cooling humidification and dehumidification without user in volvement Outdoor Temperature Sensor Communicatingoutdoor units contain a built in outdoor temperature sen sor Installing icomfortt thermostat Refer to the Quick Start Guide for all the information about installing the thermostat to a wall and for wiring diagrams for connecting the thermo stat to th...

Страница 6: ...to contin ue SYSTEM DISCOVERY IN PROGRESS Figure 2 System discovery tests Thermostat 1 Use this Thermostat press here setup HELP Figure 3 Use this thermostat screen During the setup process alerts may pop open to inform the installer some item of information that affects the setup figure 4 Tend to any such alerts prior to continuing setup Active Critical Alert Code 31 AIR HANDLER reports Lost Comm...

Страница 7: ...ion default use Time and Date see Page 8 Daylight Saving Time Enabled Disabled Enabled Circulate Fan ON Time 15 to 45 35 Dealer Name alpha numeric characters Lennox 1 800 9 LENNOX www lennox com use type writer to change Dealer Address Dealer Phone Number Dealer Email Dealer Website If you want to modify a setting use one of the tools shown in figure 6 Make time and date as described on Page 8 Aft...

Страница 8: ...ite type in a dark box for example press the 10 box in figure 8 Press the up down arrows to change the data Press other boxes and adjust with the arrows for all time and date information When the date and time is correct press save to save settings and return to previous settings screen adjust Time and Date 10 19 AM Oct 15 2009 save cancel setup HELP Figure 8 Set current time and date NOTE After s...

Страница 9: ...utton near Add or Remove Non communicating equipment Also in order for the user s display to show these controls the system controls must be set See Page 12 for more information Use the up down arrows see figure 10 to select a setting The right hand side of the screen indicates what is currently selected for example Cur rent Value Not Installed press edit if you want to modify that setting setup H...

Страница 10: ...re 14 With one of the devices in figure 12 highlighted press edit to go to that device s list of settings see figure 13 Use the up down arrows to scroll through the device s settings and ob serve the right hand side of the screen figure 13 to see the current set ting for example Current Value Off Press edit if you want to modify that setting or press back to return to the previous screen Equipment...

Страница 11: ...en in red type You will be required to highlight the red type de vice s and use edit see figure 12 to change or at least view the changed settings of the red type de vices HP XP19 060 230 06 5809K00015 AIR HANDLER CBX32MV 60 5809K00020 In the edit mode the feature list will show the selected device s changed features in red type Use the up down arrows to select each red typed feature and press edi...

Страница 12: ...t of the next screen see figure 16 Use the arrows to locate Humidification Control Mode and or De humidificationControl Mode Press edit Dependingon the type of equipment installed the lists of options may be different than those shown in figure 17 In order for either or both of these controls to display the selected option must be other than Display Only setup tests equipment HELP XP19 060 230 06 ...

Страница 13: ...ew point adjustment mode will change the humidificationsetpoint based on the outdoor temperature and a user de fined dew point adjustment setting DEHUMIDIFICATION modes In BASIC mode dehumidification occurs if these conditions are met and signals are present at specific terminals dehumidification has been enabled on installer settings and the unit is in COOL mode and dehumidification demand exists...

Страница 14: ... begin system testing start alerts diagnostics EXIT Figure 18 Select tests to run When the tests screen opens TEST ALL will be highlighted but not yet selected If you want to run TEST ALL press select Note your selection on the right side says selected test TEST ALL Also note there are now two buttons along the bottom labeled remove and start Use remove to deselect a selected test If you prefer ru...

Страница 15: ...l CURRENT TEST Blower Check Blower Operation next cancel TEST ALL example single test example Figure 20 Typical tests results screens After pressing done the Testing finished screen will appear see figure 21 At this point use the EXIT tab if you are finished with all setup or use diagnostics tab to analyze the system or use equipment tab if you wish to make any changes to device details setup test...

Страница 16: ...809K00020 THERMOSTAT 49W95 A109K00139 SYSTEM about next step back to adjust a device highlight it then press edit system devices edit reset ALL Figure 22 Equipment details edit setup tests equipment HELP Equipment Name Filter 1 Timer Selection Filter 2 Timer Selection UV Bulb Timer Selection Humidifier Pad Timer Selection back to adjust a setting highlight it then press edit Current Value System S...

Страница 17: ...screen shows which item is selected figure 25 Use start to begin the process The screen will show DIAGNOSTICS IN PROGRESS briefly then change to show the list of values and conditions discovered Use the arrow buttons to scroll through the information and take note of any found to be out of operating range Pressdone when finished with the information and select another device to diagnose or use EXI...

Страница 18: ...ew 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 display will show There are no new alerts that require service SYSTEM ALERTS HP XP19 060 230 06 5809K00015 AIR HANDLER CBX32MV 60 5809K00020 THERMOSTAT 49W95 A109K00139 view active alerts view cleared alerts System Devices use ...

Страница 19: ...nswer no to the was action taken screen shown to the right the alert reappears and is not cleared Action must be taken either to perform the maintenance re quired or instead of clearing you may edit the time to again be reminded de scribed later If you press yes to was action taken the Set new alert date screen figure 28 appears You may chose from the list of options or set a cus tom time see figu...

Страница 20: ...ter and select from Remind later options list see figure 31 or set a custom time as described earlier see figure 30 set time for next reminder 1 day 1 week 1 month 3 months custom time select cancel set alert description ALERT 1 of 5 Service Alert Code 0 Thermostat reports Replace Filter 1 Latest Occurrence 04 03 09 08 45 PM 4 Occurrences press for more Figure 31 Remind later options After selecti...

Страница 21: ... HP XP19 060 230 06 5809K00015 AIR HANDLER CBX32MV 60 5809K00020 THERMOSTAT 49W95 A109K00139 view active alerts view cleared alerts System Devices alerts diagnostics EXIT use the arrows to select a device Figure 33 System Devices alerts If no alert or only one alert is present in the history of cleared alerts only the back button appears If no alerts are present in the system or de vice s history ...

Страница 22: ...ified Lennox equipment installer warning screen ap pears press yes to proceed no returns the home screen WARNING The following screens are intended for use by qualified Lennox equipment installers only Do you want to proceed yes no Figure 36 Qualified Lennox equipment installer warning When you press yes the thermostat s processor will search for commu nicating devices in the system The next displ...

Страница 23: ...ystem the screen will change to the system discovery screen The Re configure confirmation screen figure 38 will only appear on attempts to RE CONFIGURE the system It is a reminder that system configuration may affect some existing device settings and prompts to confirm or cancel the configuration process returns to figure 37 Press confirm to continue system configuration the screen will change to ...

Страница 24: ...accept the device and write the thermostat s settings from the previous configuration to the found compatible device The display changes to Settings were copied Press next to advance to the next screen Figure41 lists all communicating devices found and gives you an oppor tunity to review the reconfigured devices Use the arrow buttons to scroll through the list of items found on the left of the scr...

Страница 25: ...ct Information Website www lennox com Typewriter input screen SYSTEM Equipment Name Typewriter input screen Filter 1 Timer Selection Calendar Time Calendar Time Run Time Filter 2 Timer Selection Calendar Time Calendar Time Run Time Humidifier Pad Timer Selection Calendar Time Calendar Time Run Time UV Bulb Timer Selection Calendar Time Calendar Time Run Time PureAir Timer Selection Calendar Time C...

Страница 26: ... 4th Stage Delay 20 Minutes 5 to 120 Minutes 5 Min 5thStage Delay 20 Minutes 5 to 120 Minutes 5 Min 6th Stage Delay 20 Minutes 5 to 120 Minutes 5 Min Locked in 2nd Stage HP by Outdoor Temp Off Off 40F 4C 45F 7C 50F 10C 55F 13C Balance Point Control Disabled Enabled Disabled Defrost Target Discharge Temp 55ºF 50 to 60ºF 1ºF Dehumidification Control Mode Display Only Display Only Basic Precision Hum...

Страница 27: ...ication Airflow 10CFM Dehumidification Airflow 70 60 to 80 percentage of reduction of High Cooling Airflow 1 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 Cooling Indoor Blower ON Delay 2 sec 0 to 10 Seconds 1 sec HP Indoor Blower OFF Delay 45 sec 0 to 60 Seconds 5 s...

Страница 28: ... 70 000 BTU 1 2 HP fan 500 675 25 90 000 BTU 1 2 HP fan 425 625 25 90 000 BTU 1HP fan 625 875 25 110 000 BTU 1 HP fan 750 1025 25 135 000 BTU 1HP fan High Heating Airflow CFM 100 heat DIP SW 800 1100 25 Heating Airflow Control Type 0 70 000 BTU 1 2 HP fan 925 1250 25 90 000 BTU 1 2 HP fan 1025 1425 25 90 000 BTU 1HP fan 1350 1850 25 110 000 BTU 1 HP fan 1500 2050 25 135 000 BTU 1HP fan Low Heating...

Страница 29: ...FM Max CFM 25 1 HP blower Other Parameters Equipment Name Furnace N A N A N A None Up to 35 characters Continuous Indoor Blower Airflow DIP SW See Note 3 Min CFM Max CFM 25 None 1 2 HP blower Min CFM Max CFM 25 1 HP blower Humidification Airflow Same as above Min CFM Max CFM 25 Humidifier present 1 2 HP blower Min CFM Max CFM 25 1 HP blower Dehumidification Airflow Percentage 140 70 120 60 160 80 ...

Страница 30: ...cale F F Fahrenheit C Celsius Clock Format 12H 12 Hour 24 Hour Screen Lock out Unlocked Unlocked Partially Locked Fully Locked Backlight Setting Always On Power Save Always On Backlight Intensity 100 20 to 100 20 Outdoor Temp Display Disabled Disabled Enabled Indoor Humidity Display Enabled Disabled Enabled Filter 1 Timer Disabled Disabled 3 Months 6 Months 12 Months 24 Months Custom Time Filter 1...

Страница 31: ...ng equipment is not stuck ON Check accuracy of the thermostat temperature Try to heat the space to above 40ºF 31 Lost Communication with DEVICE2 DEVICE2 is not communicating to the thermostat for more than 3 minutes Check connections if fault persists then cycle power 32 Asynchronous Reset DEVICE2 DEVICE2 is resetting by itself Check power connections and check 24VAC voltage at DEVICE The alarm is...

Страница 32: ...ve Relay Contact Closed Check wiring to relay if wiring is correct replace relay 207 HSI Sensed Open Measure resistance of Hot Surface Ignition ignitor Replace if open or not within specification range found in IOM 223 Low Pressure Switch Open Check inches of water column closing pressure of low pressure switch on heat call measure inches of water column of operating pressure inspect vent and comb...

Страница 33: ... low air flow 275 Watch Guard Flame Out of Sequence No Flame Shut off gas check for gas valve leak 276 Watch Guard Calibration Failure Unable to perform pressure switch calibration Check vent system and pressure switch wiring connections 290 Ignition Circuit Problem Measure resistance of Hot Surface Ignition ignitor replace if open or not within specification otherwise replace control 291 Heat Air...

Страница 34: ... not close or the relay coil in the electric heat section did not energize 352 Electric Heat Stage 2 Problem Heat section Stage 2 failed Same as Code 351 353 Electric Heat Stage 3 Problem Heat section Stage 3 failed Same as Code 351 354 Electric Heat Stage 4 Problem Heat section Stage 4 failed Same as Code 351 355 Electric Heat Stage 5 Problem Heat section Stage 5 failed Same as Code 351 400 LSOM ...

Страница 35: ...Faulty The board detects open sensor or out of temperature sensor range This fault is detected by allowing the unit to run for 90 seconds before checking sensor resistance If the sensor resistances not within range after 90 sec onds the board will count one fault After 5 faults the board will lockout 418 W Output Hardware Fault Replace the control board 419 W Output Hardware Fault Lockout 420 Defr...

Страница 36: ...nded to be mounted downstream of the heat exchanger and air condi tioning coil It must be placed in free airflow where other accessories such as humidifiers UV lights etc will not interfere with its accuracy Wiring dis tance between the IFC or AHC and the discharge air sensor should not exceed 10ft when wired with 18 gauge thermo stat wire OAS NOTE Wiring distance between the IFC or AHC and the ou...

Страница 37: ...TDOOR AIR CONDITIONING UNIT 1 OR 2 STAGE icomfort Thermostat icomfort Indoor Furnace or Air Handler Standard Outdoor Condensing Unit OPTIONAL OUT DOOR AIR SENSOR SEE OAS NOTE Page 36 OPTIONAL DIS CHARGE AIR SEN SOR SEE DAS NOTE Page 36 OPTIONAL OUT DOOR AIR SENSOR SEE OAS NOTE Page 36 OPTIONAL DIS CHARGE AIR SEN SOR SEE DAS NOTE Page 36 Maximum total length of all connec tions on the RSBus is limi...

Страница 38: ... HANDLER AHC icomfort THERMOSTAT DISCHARGE AIR SENSOR REQUIRED FOR EVEN HEAT SEE DAS NOTE Page 36 NOTE icomfort T STAT SENSES HUMIDITY CON TROLS 24V H OUTPUT 120V H OUTPUT TO CYCLE HUMIDIFIER BASED ON DEMAND NO OTH ER CONTROL OR HUMIDISTAT REQUIRED OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIFIER IF NOT ALREADY IN THE SYSTEM FOR OTHER FUNCTIONS BUILT INTO ALL icomfort OUT DOOR UNITS SEE OAS NOT...

Страница 39: ...t FURNACE OR AIR HANDLER icomfort FURNACE OR AIR HANDLER HEPA BYPASS FIL TER X2680 HEPA INTERLOCK KIT PASS INDOOR BLOWER MOTOR COMMON WIRE THROUGH CURRENT LOOP SEE HEPA INTERLOCK KIT FOR INSTALLATION DE TAILS LVCS VENTILATION CONTROL SYSTEM SEE LVCS VENTILATION INSTRUCTIONS FOR DAMPER SENSOR WIRING icomfort OUTDOOR AIR CONDITIONING OR HEAT PUMP UNIT STANDARD 1 OR 2 STAGE AC OR HP UNIT ...

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