INSTALLER’S SYSTEM SETUP GUIDE 2009 Lennox Industries Inc. Dallas, Texas, USA icomfortt Thermostat Touch Screen Programmable Communicating Thermostat CONTROLS 506052−01 11/09 Litho U.S.A.
Table of Contents WARNING icomfort Thermostat Terms and Acronyms . . . . . . . . . . . . . . . . . 3 icomfort Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 icomfort Thermostat Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installing icomfort Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installer setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 System settings . . . . . . . . .
icomfortt Thermostat Terms and Acronyms Subnet Controller (SC): (part of the communicating thermostat) Local device that controls the system. tions, fan motor, and reversing valve and monitors all safety features in the unit. Subnet: A part of the communication network that contains devices to control one functional HVAC system. AC Control: Communicating air conditioning control. AC controls low and high speed compressor operation, fan motor operation, and all safety monitors in the unit.
icomfortt Technical Description The 24VAC icomfort thermostat stores system parameters and settings 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 heating and 2 stages of auxiliary backup heat are provided.
icomfortt Thermostat Features Installing icomfortt thermostat Thermostat Type Electronic communicating, color display touch screen, 7−day programmable. Supports Humidification Measurement and Control, Dew Point Adjustment Control, Dehumidification Measurement and Control, Humiditrol® Enhanced Dehumidification Accessory (EDA), Multi-stage HVAC Systems, Equipment Maintenance Reminders. On-board Help Screens.
Installer setup − Page 1 of 8 After power is applied to the thermostat for the first time, the processor checks the system for installed communicating devices, the System discovery" screen (figure 2) is displayed on the thermostat; followed by the Use this thermostat" screen (figure 3). Press press here to continue. 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.
Installer setup − Page 2 of 8 System settings (figure 5) appear first. As you use the up/down arrows to scroll through the settings, the right hand side will show the current value, for example, Current Value: (35% ) shows the current setting of the Circulate Fan ON time. setup 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.
Installer setup − Page 3 of 8 Setting time and date Use the arrows to select Time and Date; press edit (see figure 7). Press next to proceed to the Set current time and date" screen (figure 8). tests setup system settings setup HELP HELP to adjust a setting, highlight it, then press edit.
Installer setup − Page 4 of 8 Add/remove/modify non−communicating devices setup From this screen (figure 9), use the yes button to access a list of non− communicating devices for installing or removing. A list similar to that shown in figure 10 will appear.
Installer setup − Page 5 of 8 Modify communicating device settings setup Use this screen (figure 12) to access communicating devices’ settings. Use back to return to the previous screen or next step to go on.
Installer setup − Page 6 of 8 If you select reset and then confirm, the highlighted device will be reset to its factory setting. You would see a screen similar to figure 14, but referencing only the selected device. Resetting ALL devices to their factory default settings will cause the system to restart the setup process. If you want to continue, then press ’confirm’ or press ’cancel’. confirm cancel Figure 14.
Installer setup − Page 7 of 8 Indoor air quality controls setup An example of installing UV Light is shown in figure 10, Page 9. system devices To turn on humidification or dehumidification controls, in addition to the setup described on Page 9, work from either the setup tab or the equipment tab to get to the adjustment screen (figure 15). Use the arrows to highlight the SYSTEM selection. Press edit. A long list of features are listed on the right of the next screen (see figure 16).
Installer setup − Page 8 of 8 setup tests equipment HUMIDIFICATION modes HELP BASIC & PRECISION these modes allow user control of RH between 15 and 45%. These conditions must be met for either mode to operate: (to adjust a setting, highlight it, then press edit) SYSTEM Equipment Name Current Value: (Display Only) Filter 1 Timer Selection . . (various) . .
Tests − Page 1 of 1 The tests feature is not available until after setup has been completed once. After you press next step in the final setup screen, the Select tests to run" screen (figure 18) appears. If you re−select the tests tab from any other screen, a message to press Start button below to begin system testing" appears; press start. When the tests screen opens, TEST ALL will be highlighted (but not yet selected). If you want to run TEST ALL, press select.
Tests − Page 1 of 1 After the tests have been started, the screen will describe which test is running (see figure 20). After concluding that the results are the desired results for any test, press next (if using TEST ALL) to proceed to the next test or done (if running a single test). After pressing done, the Testing finished" screen will appear (see figure 21).
Equipment − Page 1 of 1 This feature allows the installer to edit details of devices in the system without having to re−run the setup program. The following appears after the equipment tab has been selected setup SYSTEM press start button below to edit details of devices in the system Equipment Name Filter 2 Timer Selection Press start; the Equipment details edit" screen (figure 22) will open.
Diagnostics − Page 1 of 1 If you need to run diagnostics to analyze the system, press the diagnostics tab. The Select device to run diagnostics" screen (figure 24) will open. select device to run diagnostics on run diagnostics on: run diagnostics on: HP HP XP19−060−230− 06 5809K00015 AIR HANDLER CBX32MV−60 5809K00020 HP XP19−060−230− 06 5809K00015 AIR HANDLER CBX32MV−60 5809K00020 select type of device to run diagnostics on select remove start diagnostics HP Diagnostics diagnostics Figure 24.
Alerts − Page 1 of 4 As described earlier on Page 6, alerts may pop up on the screen during setup. To view alerts otherwise, press the alerts tab. Up to 10 alerts are stored for recall by the technician. The left side of the main alert screen shows a list of each communicating device discovered in the system and includes model and serial number information. The up/down arrows allow you to scroll through the list of discovered devices. The selected device is shown in bold lettering.
Alerts − Page 2 of 4 Clearing alerts alert description A critical alert (red 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 before clearing the alert. Press clear (see figure 27) to request clearing of a critical alert; then confirm the request (shown to the right).
Alerts − Page 3 of 4 Using custom time" alert description Use Setting custom time" screen (figure 30) to set an exact date and time for the reminder to appear. Press in one of the boxes to highlight it and use the up/down arrows to change the value in that box. Repeat for all boxes. When desired reminder is displayed, press set.
Alerts − Page 4 of 4 View cleared alerts A history of cleared alerts allows the installer to review the cleared alerts. This information can help diagnose problems. Use the arrows to (figure 34) select either SYSTEM ALERTS or a devicefrom the list (see figure 34) and press view cleared alerts. Then scroll through the alerts using next alert (see figure 34). The back button returns to the system devices alerts screen.
Access installer program from Home screen − Page 1 of 1 To access the installer program 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 35). The system will access the installer screens. Figure 36, Qualified Lennox equipment installer warning" screen appears; press yes to proceed (no returns the home screen). WARNING The following screens are intended for use by qualified Lennox equipment installers only.
Reconfiguring a system − Page 1 of 2 To begin reconfiguring a system, press the setup tab. The Start system configuration" screen (figure 37) appears; press start to proceed. Press confirm to continue system configuration; the screen will change to the system discovery screen. setup setup tests equipment tests tests equipment HELP HELP configuring the system may affect some device settings.
Reconfiguring a system − Page 2 of 2 While reconfiguring, the thermostat will have retained settings from the previous configuration. If a device has been replaced and re−configuration has detected its replacement device, it will know the original device is missing and prompt the installer (figure 40). If this is the initial configuration, the Compatible device found" screen does not appear.
Editable Parameters Table (User and Installer) Parameter Name: Default Parameter Value Setting Increment Installer settings Time and Date (Time/date elements screen) Enabled Enabled, Disabled 35% 15 to 45% 1% Lennox (Typewriter input screen) (Typewriter input screen) Dealer Contact Information – Phone 1−800−9−LENNOX (Typewriter input screen) Dealer Contact Information – Email (Typewriter input screen) www.lennox.
Parameter Name: Default Parameter Value Setting Increment 1st Stage Differential 0.5ºF 0.5 to 3ºF .5ºF 2nd Stage Differential 1.5ºF 0.5 to 8ºF .5ºF 3rd Stage Differential 2.0ºF 0.5 to 8ºF .5ºF 4th Stage Differential 2.5ºF 0.5 to 8ºF .5ºF 5th Stage Differential 3.0ºF 0.5 to 8ºF .5ºF 6th Stage Differential 3.5ºF 0.5 to 8ºF .
Parameter Name: Default Parameter Value Setting Air Handler (Typewriter input screen) Increment AIR HANDLER Equipment Name Electric Heating Airflow Low Cooling Airflow High Cooling Airflow Cooling Airflow Profile nnnn CFM SEE NOTE −. 1 NOTE: CFM Default and Values Settings are dependent on the tonnage of the unit 5CFM 5CFM 1: No Delays, 2: ON: No delays; OFF: 45 sec delay 3: ON: 82%/7.5min; OFF: No delays 4: ON: 50%/30s,82%/7.
Value Parameter Name FURNACE Heating indoor blower OFF delay Heating indoor blower ON delay Cooling indoor blower OFF delay Cooling indoor Blower ON Delay Heat pump indoor blower OFF delay Heat pump indoor blower ON delay Default Min. Max. Incr. DIP SW 45 0 2 45 0 60 15 0 0 0 0 180 45 30 10 60 30 10 5 2 1 5 5 0 – Fixed CFM 0 Dependency None None Outdoor Unit present Outdoor Unit present Heat Pump present Heat Pump present Note DIP switch setting in Non−comm. 45 sec fixed in Non−Comm.
Value Parameter Name Default High Cooling Airflow (CFM @ 100% cool) OU tons (OUNC) * 400CFM Low Cooling Airflow (CFM @ lowest cool stage) See Note1 below Airflow Profile − Cooling Min. Min Min Min Min DIP SW CFM CFM CFM CFM 0 Max. Incr. Cooling Airflow Setting Max CFM Max CFM Max CFM Max CFM 3 25 25 25 25 1 Dependency Outdoor Unit present 2+ stage Outdoor Unit present Outdoor Unit present Note 1/2 HP blower 1 HP blower 1/2 HP blower 1 HP blower 0–Text ID 0x0105 (A:ON:50%/30s,82%/7.
Parameter Name: Default Parameter Value Setting Increment User settings Time and Date (Time/date elements screen) Enabled Enabled, Disabled 35% 15 to 45% 1% Lennox (Typewriter input screen) (Typewriter input screen) Dealer Contact Information – Phone 1−800−9−LENNOX (Typewriter input screen) Dealer Contact Information – Email (Typewriter input screen) www.lennox.
Alarm Codes and Troubleshooting Alarm ID Message Name Action required to Clear/Recover 10 Unknown Device Detected − DEVICE2 Reconfigure the system. Press and hold Lennox Logo, press setup tab, press start, and press confirm. If still persists, then check all DEVICE connections to make sure they are icomfort compatible. 11 Missing DEVICE2 Check all connections and cycle system power. If problem persists, then reconfigure the system (procedure mentioned above).
Alarm Codes and Troubleshooting Alarm ID Message Name Action required to Clear/Recover 125 Control Hardware Problem Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is persistent. 126 Control Internal Communication Problem Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is persistent.
Alarm Codes and Troubleshooting Alarm ID Message Name Action required to Clear/Recover 241 Flame Out of Sequence − Still Present Shut off gas, check for gas valve leak. 250 Primary Limit Switch Open Check firing rate on furnace, blockage in heater, and air flow. 252 Discharge Air Temperature High Check temperature rise, air flow and input rate. 270 Watch Guard − Flame Failure on Ignite Check for gas flow, ignitor lighting burner, flame sensor current.
Alarm Codes and Troubleshooting Alarm ID Message Name Action required to Clear/Recover 313 Indoor/Outdoor Unit Capacity Mismatch Incorrect indoor/outdoor capacity code selected. Check for proper configuring in installation instructions. Alarm is just a warning. The system will operate, but might not meet efficiency and capacity parameters and alarm would clear when commissioning is exited.
Alarm Codes and Troubleshooting Alarm ID Message Name Action required to Clear/Recover 410 Open Low Pressure Switch Remove any blockages or restrictions from indoor coils and/or fans. Check refrigerant charge and system operation. 411 Low Pressure Switch Strikes Lockout Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test mode or resetting low voltage power.
Wiring Diagrams − Communicating Systems 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 10ft when wired with 18−gauge thermostat wire.
Wiring Diagrams − Communicating Indoor/non−Communicating Outdoor Systems icomfort AIR HANDLER (AHC) OPTIONAL DISCHARGE AIR SENSOR (SEE DAS NOTE Page 36) icomfort FURNACE (IFC) OR AIR HANDLER (AHC) OPTIONAL DISCHARGE AIR SENSOR (SEE DAS NOTE Page 36) OPTIONAL OUTDOOR AIR SENSOR (SEE OAS NOTE Page 36) icomfort THERMOSTAT RSBus Maximum total length of all connections on the RSBus is limited to 1500ft. Wire gauge of RSBus wire is 18.
Optional Accessories for use with any icomfortt system NOTE: icomfort T’STAT SENSES HUMIDITY & CONTROLS 24V H" OUTPUT (& 120V H" OUTPUT) TO CYCLE HUMIDIFIER BASED ON DEMAND. NO OTHER CONTROL OR HUMIDISTAT REQUIRED. icomfort FURNACE (IFC) OR AIR HANDLER (AHC) DISCHARGE AIR SENSOR (REQUIRED FOR EVEN HEAT) (SEE DAS NOTE Page 36) OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIFIER (IF NOT ALREADY IN THE SYSTEM FOR OTHER FUNCTIONS. BUILT INTO ALL icomfort OUTDOOR UNITS).
Optional Accessories for use with any icomfortt system icomfort FURNACE OR AIR HANDLER icomfort FURNACE OR AIR HANDLER HEPA BYPASS FILTER X2680 HEPA INTERLOCK KIT icomfort OUTDOOR AIR CONDITIONING OR HEAT PUMP UNIT PASS INDOOR BLOWER MOTOR COMMON WIRE THROUGH CURRENT LOOP.