Lennox Core Unit Controller Setup Manual
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Lennox Core Unit Controller Setup Manual

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LENNOX
CORE UNIT CONTROLLER
®
SETUP GUIDE
508111-01
5/2021
Supersedes 3/2021
WARNING
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
1

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  • Page 1 LENNOX CORE UNIT CONTROLLER ® SETUP GUIDE 508111-01 5/2021 Supersedes 3/2021 WARNING 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...

  • Page 2: Table Of Contents

    Table of Contents CORE Unit Controller Overview ......3 15.3. DSI Board (A3)............84 1.1. Lennox CORE Service App - Android or iOS ® 15.4. W4 Control ............87 Device Minimum System Requirements ....3 16. Quick Start Guide ..........88 1.2. Additional Features ..........3 17.

  • Page 3: Core Unit Controller Overview

    Lennox Commercial website. • Four stages in VAV/Discharge Air Control with thermostat www.lennoxcommercial.com input to W1 The Lennox Core Unit Controller is a multi-processor- • Multi-Zone VAV (Discharge Control) Heating and Cooling based controller. Standard with all Model L™ rooftop units, •...

  • Page 4: Lennox Core Unit Controller - Connections, Inputs / Outputs, Jumpers, And Leds Locations

    P299 connector. This jumper would be removed only in unique situations where the device supplying the thermostat/ humidistat signals to the CORE Unit Controller has its own power source and does not share a common reference voltage with the CORE Unit Controller. Otherwise the jumper...
  • Page 5 Table 1. LED Operation Indicators Status Indication Meaning Green Slow Flash Normal Operation Green Fast Flash Boot loader / firmware update mode Heartbeat (HB) (D33) No light Steady Off No voltage to M3 board or defective board Green Steady On Unit in configuration / test mode (not in normal mode) Flickering BUS (green) Network traffic present S-BUS / PC Connection (D70 Flickering...

  • Page 6: Cloud Firmware Updates

    Figure 3. W4 Controller Interfaces 1.8. Cloud Firmware Updates The CORE Unit Controller is an input and output junction • Internet connection is required point. If in the thermostat mode, thermostat inputs at P297 result in an output to unit components. If the heartbeat LED •...

  • Page 7: Core Service App Menu Selection Overview

    4. CORE Service App Menu Selection 6. System Overview - Room Sensor Mode Overview a. The system overview shall put emphasis on the zone temperature and RH. Refer to “9. CORE Service App RTU Menu” on page 8 for details for Setup, Data, Service and Settings options. •...

  • Page 8: Active Alarms

    7. Active Alarms Model Number • The mobile app will display other alarm 1 2 3 4 5 6 7 8 9 10 11 12 information such as time of occurrence, and troubleshooting information. Type [1, 2, 3] [12] Voltage •...
  • Page 9 [5] Phase / Voltage Detection [6] IAQ Options Not Installed = N = Not Installed Enabled Internal (Lennox) = 1 1 = UV Lamp Installed External (A42) Phase Detection = 2 2 = Bipolar Ionizer Installed on DI-2 3 = UV Lamp and Bipolar...
  • Page 10 9.1.2. Install Menu Navigation DATE TIME CONFIGURATION ID1 INSTALL RTU INFORMATION USE MOBILE DEVICE CONFIGURATOIN ID2 DATE AND TIME DEHUMIDIFICATION SETPOINT DEHUMIDIFICATION DISABLED INSTALL SUMMARY DEHUMIDIFICATION DEADBAND MODE OVERCOOL LIMIT BLOWER OCCUPIED SELECT SENSOR SELECT SENSOR ON/OFF PREVIOUS COOLING TYPE TYPE NONE REPORT RELATIVE...
  • Page 11 9.1.3. Network Integration NETWORK NETWORK STATUS INTEGRATION MONITOR ONLY SUMMARY MAC ADDRESS SELECT NETWORK SETUP DEVICE INSTANCE CONTROL NETWORK SETUP BACNET MS/TP WIZARD BAUD RATE MODE ROOM SENSOR NETWORK THERMOSTAT SELECT SELECT SELECT CO2 RELATIVE TEMPERATURE SENSOR LOCAL (OR NONE) HUMIDITY LOCAL (OR NONE) LOCAL (OR NONE)
  • Page 12 NETWORK NETWORK NETWORK STATUS STATIC INTEGRATION DYNAMIC (DHCP) NONE CLOUD/IP CONFIGURATION IP ADDRESS NETWORK SETUP NETWORK AND CLOUD/IP ENTER BACNET OVER IP SUBNET MASK NETWORK SETUP BACNET IP DEVICE INSTANCE WIZARD CONFIGURATION DEFAULT GATEWAY PORT MAC ADDRESS MONITOR ONLY SUMMARY SELECT CONTROL MODE...
  • Page 13 NETWORK NETWORK STATUS INTEGRATION MONITOR ONLY SUMMARY SELECT NETWORK SETUP NETWORK SETUP LONTALK CONTROL WIZARD MODE ROOM SENSOR SELECT CO2 SENSOR LOCAL (OR NONE) LOCAL (OR NONE) LOCAL (OR NONE) SELECT SOURCE SELECT RELATIVE TEMPERATURE HUMIDITY SENSOR SENSOR SOURCE SOURCE NETWORK NETWORK NETWORK...
  • Page 14 NETWORK NETWORK STATUS INTEGRATION MONITOR ONLY SUMMARY SELECT NETWORK SETUP NETWORK SETUP S-BUS S-BUS ADDRESS CONTROL WIZARD MODE ROOM SENSOR NETWORK THERMOSTAT SELECT SELECT SELECT CO2 RELATIVE LOCAL (OR NONE) LOCAL (OR NONE) LOCAL (OR NONE) TEMPERATURE SENSOR HUMIDITY SENSOR SOURCE SENSOR SOURCE...
  • Page 15 NETWORK NETWORK STATUS INTEGRATION WIRELESS SENSOR MODIFY THE RTU NETWORK SETUP PROVISION PROVISION RTU RTU PROVISION NETWORK SETUP NAME (OPTIONAL) PROVISON SENSOR NETWORK PRESS BEACONING NODE PROVISION ADD NODE (CUSTOM NAME FOR NODE BUTTON (OPTIONAL) NETWORK NODES INFORMATION OPERATIONS – - MODEL NUMBER FACTORY RESET - SERIAL NUMBER...
  • Page 16 9.1.4. Test and balance • Blower: Includes Blower Calibration, MSAV Blower and VAV Calibration, • Damper: Includes Economizer Options, Free Cooling, Damper Calibration (closed and open), BLOWER TEST AND TEST AND BALANCE BALANCE DAMPER MSAV BLOWER START AND STOP SUMMARY CFM SETTINGS BLOWER VAV BLOWER...
  • Page 17 BLOWER TEST AND TEST AND BALANCE BALANCE DAMPER MSAV BLOWER START AND STOP SUMMARY CFM SETTINGS BLOWER SELECT SET FREE COOLING ECONOMIZER SUPPLY SETPOINT OPTION VAV BLOWER VAV CALIBRATOIN VAV BLOWER OPEN ALL ZONE BLOWER ON START BOXES STATIC PRESSURE VAV CALIBRATOIN STATIC PRESSURE SETPONT...

  • Page 18: Data

    9.2. Data 9.2.1. Alarm History The unitary controller will produce active and past alarm codes. As such, the mobile application will show all active alarm codes, and a limited history of formerly-active alarm codes, based upon the storage capacity of the unitary controller. The CORE Service application will: •...
  • Page 19 9.2.3. Factory This section will display the software version, RTU description, catalog number, model number, serial number and configuration IDs 1 & 2. RTU DESCRIPTION SOFTWARE VERSION CATALOG NUMBER FACTORY MODEL NUMBER SERIAL NUMBER CONFIGURATION ID 1 CONFIGURATION ID 2 Figure 21. Factory Menu Structure 9.2.4.
  • Page 20 RUNTIME REPORTING BLOWER BELT COMPRESSOR 1 COMPRESSOR 2 COMPRESSOR 3 COMPRESSOR 4 CONDENSER FAN 1 RUNTIMES CONDENSER FAN 2 CONDENSER FAN 3 CONDENSER FAN 4 FILTER DEHUMIDIFCATON POWER ON PRE-INSTALL FREE COOLING OPERATION POWER EXHAUST STAGE 1 Figure 22. Runtimes Menu Structure...
  • Page 21 9.2.5. System Data / Sensor Data / Output The follow inputs and outputs are as follows: • Local Inputs. Examples are local thermostat inputs, sensors, digital inputs, setpoints and advanced. • Network Inputs. Examples are BACnet MS/TP, BACnet IP, Lontalk and S-Bus •...

  • Page 22: Service

    9.3. Service 9.3.1. Component Test For cooling, the following tests can be run: • Cooling Stages 1 through 4 - Tests are discharge and return air temperatures, compressor status and percent demand. • Same tests listed above is available for all compressors present. For heating, the following tests can be run: •...
  • Page 23 9.3.2. Report This section provides service reports, system logs, system profile and user profile. All logs and reports and either be downloaded to the via the W4 • Service reports - These reports are saved to the root directory of the USB storage device. In addition you can save the report to the mobile device being used and either text or email.
  • Page 24 REMOTE RESET RESET (REBOOT) ADVANCED ADVANCED CLEAR DELAYS CONTROL CONTROL CONTROLLER LOCKOUT LOCKED TOGGLE ON OR OFF Figure 26. Advanced Control Menu Structure 9.3.4. Firmware Update • The mobile application will update the firmware of the unitary controller. • The mobile application will push any supported firmware image version to the unitary controller. • Options are Automatic Cloud Update or upgrade from USB. 9.3.4.1 Updating Firmware The mobile application shall pull the latest device supported firmware version from the cloud. The screen will list current...
  • Page 25 CLOUD FIRMARE UPDATE AUTOMATIC CLOUD UPDATE = ON OR OFF REPORT USB FIRMWARE UPDATE UPGRADE FROM USB = ON OR OFF Figure 27. Firmware Update Menu Structure...

  • Page 26: Settings

    9.4. Settings 9.4.1. RTU Options Settings available are: • Blower - Speed and VFD Bypass options • Damper - Economizer Temperature and Economizer type with settings for Temperature offset and setpoint • Dehumidifier • Power Exhaust • Edit Parameters - Categories are cooling, heating, air flow, VAV, economizer, control options and miscellaneous. SPEEDS OPTIONS MSAV BLOWER CFM BLOWER SETTINGS (COOLING HIGH,...
  • Page 27 The mobile application provides a menu to run “New Unit Setup”. • New Unit setup if chosen shall direct the user towards the install menu. • The mobile application shall provide a menu to run “Install New M4” (CORE Unit Controller). • Install new CORE Unit Controller will first confirm with the user if it is okay to “Clear all Configuration”. •...

  • Page 28: Special Equipment Configurations

    10. Special Equipment Configurations AUTO CYCLES or ON-CONTINUOUS 1. c. RTU Standalone: Since a room occupancy sensor cannot 10.1. Thermal Protection Switches (S5, S8, be used in this configuration, then the only options for OCC S31 and S180) Blower Mode are AUTO CYCLES or ON-CONTINUOUS NOTE: Not all models use all of the reference switches. d.
  • Page 29 Table 6. LonTalk Occupancy Objects Input bACnet Value 0: space occupied nviOccManCmd 1: space unoccupied Manual Index = 11 2: refresh space occupied override timer 3 255: auto; clear timer and return to scheduler nviOccSched1 0: space occupied Schedule Index = 10 1- 255: space unoccupied 0: space occupied nviOccSensor...

  • Page 30: Enabling Economizer And Settings

    Cooling To enable the economizer if installed: Go to SETUP > INSTALL The CORE Unit Controller displays the outdoor air suitability information on the status screen. When reaching Configuration ID 1, position 2 will need to The appropriate sensors are provided when the economizer be set to the applicable type of economizer.
  • Page 31 ECONOMIZER OUTPUT VOLTAGE b. Use two resistors to simulate outdoor air enthalpy suitable. The CORE Unit Controller monitors P262 (DPOS) and operates as reference in Section Damper Diagnostics in c. Disconnect A62 return air enthalpy sensor jack/plug the Prodigy 2.0 (CORE Unit Controller) Application Guide J/P105.

  • Page 32: Demand Control Ventilation

    Go to DATA > SYSTEM DATA / SENSORS / OUTPUTS > LOCAL c. Check all connections and wiring between RT17 and the INPUTS > SENSORS > LOCAL CORE Unit Controller, and between RT16 and the CORE (scroll down to INDOOR AND OUTDOOR ENTHALPY) Unit Controller.
  • Page 33 10.5.1. Default Operation 10.5.3. Parameter Adjustments The CORE Unit Controller has a 0-10VDC indoor air quality Default indoor air quality economizer operation is based input for a standard 0 - 2000ppm carbon dioxide sensor. The on common or average applications. Adjustments may be...

  • Page 34: Determining Indoor Air Quality Inputs

    ONLY at both ends of the chain. • The configuration shown to the in figure 37 has a termination at the controller/router on one end and a termination at the CORE Unit Controller BACnet module on the other end; terminations are ONLY at the ends of the chain. • Cable type - twisted pair with shield, 22 awg minimum, Belden #88761 or #8761 (Lennox 27M19, 94L63, 68M35).

  • Page 35: Abbreviations

    M3 board. Main RTU control board Low pressure Analog input Limit Analog output CORE Unit Controller - main controller board (A55) Blower Modulating gas valve Add on board for third and fourth compressor and second-stage heat (A178). MSAV...

  • Page 36: Parts And Kits

    11. Parts and Kits Table 10. Parts and Kits Available for CORE Unit Controller Description Catalog number Description Catalog number Description Catalog number CORE Unit Controller 14V60 USB service kit tube 59W52 SmartWire™ Field 59W57 Replacement kit Termination kit LCD Display Replacement...

  • Page 37: Alarms

    Selected alarms (marked with * in the following table result in the closure of the service relay contacts (DO1). The contacts remain closed until the CORE Unit Controller resets, or alarm condition is cleared and alarm status is read via explicit S-BUS command.
  • Page 38 HIGH PRESS S7 OPEN COMP2 The CORE Unit Controller will clear high pressure switch alarm when corresponding high pressure switch is detected as closed. Compressor will not be restarted until corresponding high pressure switch is closed and Minimum Off Delay (cooling or heating) has expired.
  • Page 39 • Compressor lockout. Check charge, fans and coil. • The CORE Unit Controller will clear high pressure switch alarm when corresponding HIGH PRESS S96 OPEN COMP4 high pressure switch is detected as closed. Compressor will not be restarted until corresponding high pressure switch is closed and Minimum Off Delay (cooling or heating) has expired.
  • Page 40 No 24VAC relay power on A61(HP1) board, TB34-1 input. (A61) Third and fourth compressors are off. Alarm automatically clears once 24VAC is present. The CORE Unit Controller will resume operation once the ERROR TIME OFF DELAY is NO 24VAC RELAY POWER ON C3 A59 completed.
  • Page 41 When the CORE Unit Controller is not able to communicate with any attached add-on boards (C3 and GP3) this alarm code is logged. The CORE Unit Controller will retry to ID ADD ON BOARD PROBLEM establish the communication once every 5 second. Alarm is automatically cleared once communication is restored.
  • Page 42 Check sensor and wiring. This alarm activates when the A24 sensor input signal is continuously above 25% of sensor measuring range for more than five minutes with OAC ERROR blower stopped. The CORE Unit Controller will disable the Outdoor Air CFM control. The alarm automatically clears when the sensor reading is below 10% sensor measuring range for one minute.
  • Page 43 Low Voltage Alarm Threshold + 1 VAC for more than two seconds. After the low 24VAC alarm has been cleared, the CORE Unit Controller will ignore all service demands until the Error Time Off Delay has expired.
  • Page 44 Low Voltage Alarm Threshold + 1 VAC for more than two seconds. After the low 24VAC alarm has been cleared, the CORE Unit Controller will ignore all service demands until the Error Time Off Delay has expired.
  • Page 45 Table 11. CORE Control System Alarm and Event Codes SELECTED ALARMS (MARKED WITH * IN TAbLE RESULT IN THE CLOSURE OF THE SERVICE RELAY CONTACTS (DO1). ALARM DISPLAY MESSAGE EVENT ACTION CODE This alarm will occur when the combustion air pressure switch (S18) is detected as closed GAS CAB PRESSURE SW CLOSED immediately after the furnace demand relay is energized and before the combustion air blower is energized.
  • Page 46 Refer to trouble shooting guide in service manual for more information. Unable to communicate with inverter. The unit controller will disable compressor operation. INVERTER COMM Replace communication cable between inverter and CORE Unit Controller. If alarm continues, replace CORE Unit Controller or inverter. INVERTER VOLTAGE MISMATCH The unit controller will disable compressor operation.
  • Page 47 Table 11. CORE Control System Alarm and Event Codes SELECTED ALARMS (MARKED WITH * IN TAbLE RESULT IN THE CLOSURE OF THE SERVICE RELAY CONTACTS (DO1). ALARM DISPLAY MESSAGE EVENT ACTION CODE MAJOR LOSS CONDENSER AIRFLOW Major Loss of Condenser Airflow MAJOR LOSS EVAPORATOR AIRFLOW Major Loss of Evaporator Airflow C1 COMPRESSOR FLOODING Compressor Flooding Compressor 1...
  • Page 48 Table 11. CORE Control System Alarm and Event Codes SELECTED ALARMS (MARKED WITH * IN TAbLE RESULT IN THE CLOSURE OF THE SERVICE RELAY CONTACTS (DO1). ALARM DISPLAY MESSAGE EVENT ACTION CODE UTEC VALVE FAULT LOCKOUT GV2 244 - 255 RESERVED Error Reading USB Device Error Reading USB Device...

  • Page 49: Core Control System Unit Parameters

    14. CORE Control System Unit Parameters Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. ENGLISH, Select desired language for user LANGUAGE LANGUAGE SPANISH OR Option interface. Options are English, French and Spanish.
  • Page 50 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Power Exhaust PWREXH STG2 Stage 2 Minimum Power Exhaust Stage 2 Minimum Blower MIN BLR Blower Supply Proportional Base Control Variable Air Volume or Constant Air SUPPLY PID P Loop for Variable...
  • Page 51 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Constant air volume with bypass damper maximum output. Constant Air Volume with • This sets the maximum air delivered. BLOWER MAX Bypass Damper •...
  • Page 52 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Gas Blower System HT GAS BLR ON The time before the blower turns on after On Delay After Seconds DELAY Dependent a heating demand.
  • Page 53 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Low ambient outdoor air limit temp. Low Ambient 1. Parameters 83 and 84 are used Outdoor Air Limit to shed fans.
  • Page 54 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Stage 3 stage up timer. The Maximum Stage maximum time that cooling stage 2 CL STG 3 2 Cooling Time runs before calling cooling stage 3.
  • Page 55 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Smoke alarm control options. • 0 = Blower off, exhaust fan off and fresh air damper closed. • 2 = Blower off, exhaust fan on and fresh air damper closed.
  • Page 56 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Return air limit for heating. If the return air heating limit is exceeded, the heating demands are HEAT RET AIR Heating Return °F interrupted.
  • Page 57 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Suspends all unit operation room sensor and Constant Air Volume with bypass damper applications. • Suspends Fresh Air Heat Control- ZONE SENS Room Sensor Reheat, Fresh Air Cooling Control,...
  • Page 58 Backup unoccupied cooling set point. • Used if the communications link is lost for 5 minutes between the UNOCC COOL Unoccupied CORE Unit Controller and network °F STPT Cooling Set Point control panel. Used only in room sensor applications. •...
  • Page 59 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Heating stage 4 differential temperature. Used only with room sensor applications. HEAT STAGE4 Heating Stage 4 °F DIFFER Differential •...
  • Page 60 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Economizer Free ECN FRCL ENTH Cooling Enthalpy Economizer Free Cooling Enthalpy Offset OFFST Offset These are the operating profile options for the economizer damper during free cooling when any compressor is on and can be selected as follows: •...
  • Page 61 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Fresh Air Tempering Fresh Air Heating Control or Fresh Air FAT AUTO Automatic Minutes Cooling Control air Tempering auto- CHGOVR DLY Changeover changeover delay.
  • Page 62 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Discharge Air DACC STAGE Cooling Stage °F Discharge Air Cooling stage differential. DIFFER Differential A55 Service Output Control Mode = X + 32*Y + 16*Z Input source = X: •...
  • Page 63 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Service Output SRV OUTPT DB Service Output Deadband for Relative Deadband for Humidity Relative Humidity Service Output SRV OUTPT DB Service Output Deadband for Deadband for °F...
  • Page 64 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Discharge Air Control Heating DACH OAT RS Outdoor Air Discharge Air Control Heating outdoor °F ADJ BND Temperature temperature reset adjustment band. Reset Adjustment Band Discharge Air...
  • Page 65 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. • Applicable to Standard Efficiency 3- to 6-ton units only. Advanced Airflow CL LO CFM • If the absolute value of this Low Speed -1200 1200 Count...
  • Page 66 NOTE: Options for Parameter 287 are not accessible via the CORE Unit Controller user interface. Options can be set using the Lennox UC software. Here is an example of the selection options for Algorithms Enable via the Lennox UC Software: Set bit...
  • Page 67 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Building Pressure BPC PID P Control PID P Count BPC PID Proportional Constant CONST Constant Building Pressure BPC PID I Control PID I Count BPC PID Integral Constant...
  • Page 68 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Source/feedback for the PID loop. • 1 = Analog input 1 on GP3 A02 General Purpose GP A02 SOURCE Selection A02 Source •...
  • Page 69 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. General Purpose GP A03 MAX Analog output channel 3 Maximum A03 Maximum OUPUT output. Output Source/feedback for the PID loop. •...
  • Page 70 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. General Purpose GP DO1 SP General Purpose D01 Digital output D01 Set Point °F DEGREES control mode set point. Degree General Purpose D01 Digital output control mode set point.
  • Page 71 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. General Purpose GP D02 SP General Purpose D02 Digital output D02 Set Point PERCENT control mode set point. Percentage General Purpose GP D02 SP General Purpose D02 Digital output...
  • Page 72 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. MGV PID loop MGV PID D derivative Counts CONST constant Shift to high speed CAB when MGV SP HI CAB MGV output rises above this value.
  • Page 73 Table 12. CORE Control System Unit Parameters Control Control Value Parameter Short Parameter Screen Name Units Description Description Min. Default Max. Applicable to High Efficiency 3- to 5-ton BLOWER COOL Blower Cooling Depends on units only. Blower staged percentage OUTPUT High output high speed; used for high cooling equipment or ventilation,...

  • Page 74: Core Control System Inputs And Outputs

    15. CORE Control System Inputs and Outputs 15.1. CORE Unit Controller (A55) Input/Outputs Table 13. J304 (S-bus) Table 14. J299 (Digital Input)
  • Page 75 Table 15. J297 (TSTAT Inputs and Service Relays) Table 16. J298 (Analog Sensors) Table 17. J378 (Duct Sensors)
  • Page 76 Table 18. J379 (Ultra Condenser) Table 19. J380 (Smart Air) Table 20. J381 (Indoor blower and Outdoor Fan Variable Speed) Table 21. J382 (All Evaporators)
  • Page 77 Table 22. J383 (Ultra Evaporators) Table 23. J384 (Economizer)
  • Page 78 Table 24. J385 (All Condensers) Table 25. J386 (Refrigerant Loss Detection) Table 26. J387 (Options) Table 27. J388 (Pressure Switches)
  • Page 79 Table 28. J389 (Compressors 1 and 2) Table 29. J390 (Relays) Table 30. J391 (Compressor 2-Stage) Table 31. J392 (blower)
  • Page 80 Table 32. J393 (Gas Heat) Table 33. J393 (Electric Heat) Table 34. J394 (ReHeat) Table 35. J388 (C box)
  • Page 81 Table 36. J389 (C box) Table 37. J395 (Power In) Table 38. J358 (MODUS Vs COMPR) Table 39. J413 (Modbus)

  • Page 82: C4 Control (A178)

    15.2. C4 Control (A178) Table 40. P396 (Electric Heat) P396 CAV# LABEL DESCRIPTION TYPE Ground, HEAT4 HEAT4 Heat 4 24VAC OUT Ground, HEAT3 HEAT3 Heat 3 24VAC OUT J396 W HT EH_LIMIT Elec Ht Limit Sw Rtrn SW 24VAC W HT EH_LIMIT Elec Ht Limit Sw 24VAC OUT...
  • Page 83 Table 44. P399 (Pressure Switches 3 and 4) J399 Table 45. P400 (24VAC) J400 Table 46. P401 (All Evaporators) J401 Table 47. P402 (Ultra Evaporators) J402 Table 48. P403 (Options) J403 Table 49. P404 (All Condensors) J404...

  • Page 84: Dsi Board (A3)

    BOARD HE ADE RS & CONNE CT I NG PL UG HOUS I NGS # CIRCUITS BOARD HEADER DESIGNATION BOARD HEADER OEM PART # (TE) CONNECTING PLUG DESIGNATION LENNOX PART # CONNECTING PLUG OEM PART # (TE) COLOR J396 2029138-8...
  • Page 85 Table 54. J406 (A12) (M4 Control) J406 Table 55. J374 (Versions 1 through 4)
  • Page 86 Table 56. J10 (GV1) (S18) (S18) Table 57. J408 (GV1) (S47) J408 Table 58. J412 (MODUS 2) Table 59. J411 (MODUS 1)

  • Page 87: Lennox ® Core Service App - Android Or Ios 15.4. W4 Control

    Table 60. J407 (S10 and S21) J407 Table 61. DSI Control Jacks and Plugs Part Numbers 15.4. W4 Control Table 62. W4 Control Wi-Fi Antenna Wi-Fi Antenna Bluetooth Antenna Connector 1 Connector 2 Connector Battery Bluetooth Switch M4 Connector (bottom side) W4 Board Con g / Reset Switch Wi-Fi Switch...

  • Page 88: Quick Start Guide

    16. Quick Start Guide CAUTION Check rooftop unit electrical power for proper voltage and phasing. Check gas train components. a. Turn on unit and dismiss alarm messages as necessary. b. Follow SETUP > INSTALL menu to properly configure unit c. Be sure unit is in normal operating mode as seen in display (COOLING, HEATING, IDLE, etc). d.

  • Page 89: Wiring Diagrams

    17. Wiring Diagrams 538078-01 A173 CTRL SM OKE DETECT J 250 P250 P251 J 251 J 252 P252 P253 J 253 FI RE ALARM CONTACT SUPPLI ED BY OTHERS FROM I AQ W I RI NG DI AGRAM 1, 5 DI - 1 P299 P387...

  • Page 90: Fcc Compliance Statement

    18. FCC Compliance Statement PART 15.19 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. FCC Interfer- ence Statement —...
  • Page 92 Index Quick Start Guide 90 Service Relays 39 System Status Screen 7 Abbreviations 36, 37 System Status Screen Alarms 39 Unit Operation 8 Blower Operation with Effective Occupancy 29 Thermal Protection Switches (S5, S7, S8, S31 and S180) Connections 4, 7 Thermostat / Humidistat Common Isolation 4 Damper Operation During Free Cooling 31 Unit Operation 8...

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