Lennox Prodigy M2 Application Manual
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Lennox Prodigy M2 Application Manual

Lennox Prodigy M2 Application Manual

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E2010
Litho U.S.A.
Use arrows to move
DISPLAY
SERVICE
ALARM
STATUS
OFFLINE
MODE
IN/OUTPUTS
CALLS
REPLACE
USB
REPORT
M2 UNIT CONTROLLER
t Listed
BACnet
R
USB CONNECTION
(for Unit Controller
To insure correct voltage phasing before startup:
1) use refrigerant pressure gauges to check proper compressor operation and,
2) check arrow label for blower rotation.
Compressor damage will be the responsibility of the installer.
05/10
*2P0510*
506457−01
05/10
Prodigyt Application Guide (Advanced Features)
Push to select or enter value; then use
arrows
DATA
SETTINGS
TEST
RUNTIMES
UNIT
HISTORY
SETPOINTS
SENSORS
CONTROL
NETWORK
OPTIONS
FACTORY
INSTALL
L CONNECTION ( optional
connection method for Unit
software)
Controller software)
PRODIGYt APPLICATION GUIDE
DISPLAY
DISPLAY
USER INTERFACE NAVIGATION ARROWS
USER INTERFACE NAVIGATION ARROWS
SMARTWIREt
CONNECTORS
CAUTION
Page 1
USB
USB
INTERFACE
INTERFACE
PORT
PORT
(For Flash Drive
SELECT
SELECT
BUTTON
BUTTON
506457−01
*P506457-01*

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  • Page 1 506457−01 PRODIGYt APPLICATION GUIDE 05/10 E2010 Litho U.S.A. Prodigyt Application Guide (Advanced Features) DISPLAY DISPLAY Push to select or enter value; then use Use arrows to move arrows INTERFACE INTERFACE PORT DISPLAY SERVICE DATA SETTINGS PORT (For Flash Drive ALARM TEST RUNTIMES UNIT...

  • Page 2: Table Of Contents

    Table Of Contents 1. Prodigy M2 Unit Controller Description ........... .
  • Page 3 6. Reheat Operation ............... . . Page 19 6.1.
  • Page 4 Constant Air Volume (CAV) Units in Single Zone Applications with a Lennox Zone Sensor (4 Heat / 4 Cool) ........
  • Page 5 19.1.5.8. Humiditrol Dehumidification Operation − Cooling Demand Only ..Page 95 19.1.5.9. Humiditrol Dehumidification Operation − Cooling and Dehum. Demands Page 95 19.1.6. Constant Air Volume (CAV) Units in Single Zone Applications with a Thermostat or 3rd Party Unit Controller &...

  • Page 6: Prodigy M2 Unit Controller Description

    Prodigy M2 Unit Controller Description 1. Prodigy M2 Unit Controller Description The M2 Unit Controller provides all rooftop unit control functions to insure its safe and reliable operation. It also provides status and diagnostic information to facilitate troubleshooting. The controller’s programmable parameters allow adjustment of time delays and setpoints that enable advanced features.

  • Page 7: Main Controller Operation

    Main Controller Operation 2. Main Controller Operation 2.1. System Mode − Thermostat The M2 will operate the unit from a thermostat, zone sensor, or the zoning system based on the System Mode selected in ECTO 6.01. The default System Mode (option 0) is the thermostat mode. DDC applications use thermostat mode for two or three−stage cooling and two−stage heating.

  • Page 8: System Mode − Zone Sensor

    Main Controller Operation Table 4. Default Thermostat Mode Operation (Electric Heat) No. of Heat Sections Stages Per Section W1 Demand W2 Demand Stage 1 Stage 1 Stage 1 Stage 2 High Rate − Both Sections High Rate − Both Sections Low Rate −...

  • Page 9: Off Delay In Zone Sensor Mode

    Main Controller Operation The number of stages achieved depends on the type of equipment and whether or not an economizer is used. On units with economizers, free cooling becomes stage 1 and all compressor stages shift up one stage. On units with 4 compressors and an economizer, compressors 3 and 4 are controlled together for stage 4.
  • Page 10 Main Controller Operation Control Parameter Control Value Name Min. Default Units Description Stage 3 stage up timer. The maximum time that cooling stage 2 runs Stg_3_StgUp_ Counts before calling cooling stage 3. Used in zone sensor applications. 4.21 Timer F:Sec 3600 Disabled if set to 0.
  • Page 11 Main Controller Operation Units With Economizer: C1=Free Cooling C1=Cooling Stage 1 H1=Heating Stage 1 C2=Compressor 1 C2=Cooling Stage 2 H2=Heating Stage 2 C3=Compressor 2 C3=Cooling Stage 3 H3=Heating Stage 3 C4=Compressor 3 + 4 C4=Cooling Stage 4 H4=Heating Stage 4 Cooling stage−up timers 15 minutes.

  • Page 12: Unit Component Operation

    Unit Component Operation 3. Unit Component Operation 3.1. Compressor Protection and Delays 3.1.1. Compressor Minimum Run Time (3 Phase Units Only) Each compressor stage has a minimum run time of four minutes (ECTO 1.11, 4.13). 3.1.2. Compressor Off Delay (Single phase units only Compressors have a five minute (default) compressor off delay.

  • Page 13: Zone Sensor Mode

    Unit Component Operation 3.3.3. Zone Sensor Mode The occupied time period is controlled by the optional NCP when installed. The A55_P297−8 input is ignored while in the zone sensor mode except during back−up operation. 3.3.4. Gas and Electric Heat Warm−Up Mode (During occupied time period) Many building codes require a percentage of fresh outdoor air when a conditioned space is occupied.

  • Page 14: Supplemental Heat Lock Out

    Unit Component Operation The first stage of supplemental electric heat is energized when defrost is initiated (default). In units with multiple refrigerant circuits, supplemental electric heat is energized with each defrost circuit. (ECTO 1.14). NOTE − If ECTO 1.14 is set to 0", there will be no supplemental heat during defrost. Economizer dampers close during a defrost cycle.

  • Page 15: Safety Switch Input (A42−Optional)

    Sensors 3.10.2. Safety Switch Input (A42−Optional) The M2 has a 24 volt optional input (DI−3) which may be used for additional safety switches (such as a blower overload, loss of phase protector, or supply duct high pressure limit switch). Wire the safety switch in series with the input. When the input is de−energized, the M2 will turn off all outputs and display error code #20 (ECTO 5.08).

  • Page 16: Optional Supply Static Pressure Sensor

    Sensors 4.4. Optional CO (IAQ) Sensor The indoor CO sensor (A63) is an analog sensor with a 0−10Vdc output over a CO range of 0−2000ppm as shown in the following table. The sensor is powered with 24Vac. DC Voltage DC Voltage DC Voltage DC Voltage 1200...

  • Page 17: Low Ambient Fan Cycling

    Low Ambient Fan Control 5. Low Ambient Fan Control 5.1. High Efficiency A Box Fan Operation The outdoor fan in a high efficiency A Box unit operates at three distinct speeds; High, Low and Extra−low. At higher outdoor temperatures, (above 65F), the fan operates at high speed for a high cooling demand and at low speed for a low cooling or de−humidification demand.
  • Page 18 Low Ambient Fan Control Table 9 .LCH, LGH 36S,48S,60S,72H Low Ambient Fan Operations Models Associated Compressor Fan Control LCH, LGH 36S,48S,60S,72H On with S11 Table 10. LCH, LGH 090,102,120,150 Low Ambient Fan Operations Low Ambient Control OD Temp < ECTO 4.07 (55F) Models Associated Compressor LCH LGH 090 102 120 150...

  • Page 19: Reheat Operation

    Reheat Operation 6. Reheat Operation 6.1. Reheat Operation Reheat is a combination of cooling to dehumidify and heating to maintain space temperature. Supermarket reheat uses gas ® heat and Humiditrol units route hot gas to a reheat coil downstream of the evaporator. A gas heat unit is required for Super- ®...

  • Page 20: Humiditrol Reheat Operation − Digital

    Reheat Operation 6.3. Humiditrol Reheat Operation A relative humidity sensor will energize first−stage compressor(s) and hot gas will be routed to the reheat coil based on the setpoint set with ECTO 4.25 or from the L Connection network. The following options show additional conditions which must be met before reheat will be energized: ECTO 4.24 option 3 Blower energized.
  • Page 21 Reheat Operation Table 15. Outside Air for Dehumidification Conditions ECTO 4.24 Option Outside Air Dehumidification Conditions Not allowed. Allowed. No conditions apply. Allowed, blower must be energized and in occupied mode. No previous cooling demand is required. Allowed. Must be occupied. Allowed, blower must be energized and in occupied mode.
  • Page 22 Reheat Operation Table 18. 1−Compressor Humiditrol Default Operation (using 2−stage Thermostat or Zone Sensor) Demands Unit Operation Summary Idle. CP1 Reheat (Reheat Stage 1) CP1 Reheat (Reheat Stage 1) CP1 Cool Free Cool CP1 Cool CP1 Cool CP1 Cool Free Cool, CP1 Cool CP1 Cool CP1 Cool Free cooling operation is only available on units equipped with an economizer.
  • Page 23 Reheat Operation Table 20. 3−Compressor Humiditrol Default Operation (using 2−stage Thermostat or Zone Sensor) Demands Unit Operation Summary Idle. CP1 Reheat, CP2 Reheat (Reheat Stage 1) CP1 Reheat, CP2 Reheat (Reheat Stage 1) CP1 Cool, CP2 Cool Free Cool CP1 Reheat, CP2 Reheat, CP3 Cool (Reheat Stage 2) CP1 Reheat, CP2 Reheat, CP3 Cool (Reheat Stage 2) CP1 Cool, CP2 Cool, CP3 Cool Free Cool, CP1 Cool, CP2 Cool...
  • Page 24 Reheat Operation Table 22. 4−Compressor Humiditrol Default Operation (using 2−stage Thermostat) Demands Unit Operation Summary Idle. CP1 Reheat, CP2 Reheat (Reheat Stage 1) CP1 Reheat, CP2 Reheat (Reheat Stage 1) CP1 Cool, CP2 Cool Free Cool CP1 Reheat, CP2 Reheat, CP3 Cool, CP4 Cool (Reheat Stage 2) CP1 Reheat, CP2 Reheat, CP3 Cool, CP4 Cool (Reheat Stage 2) CP1 Cool, CP2 Cool, CP3 Cool, CP4 Cool Free Cool, CP1 Cool, CP2 Cool...

  • Page 25: Economizer

    Economizer 7. Economizer 7.1. General The economizer, when configured, controls damper position, which determines how much outdoor air is used to meet free cooling or indoor air quality (IAQ) require- ments, and the optional power exhaust fans. On a cooling demand, outdoor air is used for free cooling instead of first−stage compressor(s) when outdoor air is suitable (OAS).

  • Page 26: Outdoor Air Suitability

    Economizer 7.6. Outdoor Air Suitability There are six options available to determine outdoor air suitability (OAS) for free cooling. See table 24. Economizer settings are shown for each mode in figure 9. The appropriate sensors are provided when the economizer is factory−configured. When the economizer is field−configured, the ODE mode requires additional field−provided sensor(s).

  • Page 27: Damper Minimum Position Potentiometer

    Economizer 7.8. Damper Minimum Position Potentiometer Set economizer DIP switch to DSET" position as shown in figure 10. DSET is a manual mode that locks the economizer into minimum position. Rotate MIN POS SET potentiometer to the approximate desired damper position. OPEN DSET (Damper Set) MIN POS SET...
  • Page 28 Economizer Measure the voltage between P262 between pin 3 (VOT damper control) and pin 2 (GND) using pin 1 as com- mon. Voltage should read approximately 10 volts DC. Step 3. ODE" Mode of Operation In the ODE mode, dampers open for free cooling when the outdoor enthalpy is less than the enthalpy setpoint; dampers will modulate discharge air temperature (RT6) to 55°F (13°C).

  • Page 29: Demand Control Ventilation

    Economizer Step 7. Enthalpy Sensor Operation (A7 and A62) Connect a DC ammeter as shown in figure 12 to measure current of A7 or A62. DISCONNECT J/P104 DISCONNECT J/P105 Damper Travel: % of Maximum Open PLACE JUMPER WIRE HERE PLACE JUMPER WIRE HERE READ READ CURRENT...

  • Page 30: Ecto Adjustments

    Economizer 7.12.2. Default Operation The M2 has a 0−10VDC IAQ input for a standard 0−2000ppm CO sensor. The economizer starts opening at a CO level of 500 ppm ( start open" setpoint) and reaches full open at a CO level of 1000ppm ( full open" setpoint). The damper opens to 100%.

  • Page 31: Determine Iaq Input

    Economizer ECTO 5.16 Max. Open Close Open Min. Position ECTO 5.18 (full) ECTO 5.17 (start) (ppm) Figure 15. Setpoint Control IAQ Option 7.12.3.2. Determine IAQ Input Check IAQ input (ppm) by using the "DATA/SENSORS" menu selection from the Prodigy display. 7.12.4.

  • Page 32: Set Velocity Sensor Range

    Economizer 5. Return the economizer DIP switch to original position. DSET (Damper Set) OPEN NOTE − Damper set" mode locks economizer into mini- mum position. MIN POS SET Figure 17 Economizer Manual Damper Set DIP Switch 7.12.4.3. Set Velocity Sensor Range The velocity sensor is factory−set for 0−5m/s.
  • Page 33 Economizer Table 27. Outdoor Air Control ECTO Parameter Summary Control Parameter Control Value Name Default Max. Units Description OAC_Dampr_St Damper start open" setpoint for Outdoor Air Control. Level where fresh air 5.17 2.51 R: Volt art_Open_SP damper begins to open. OAC_Dampr_F Damper full open"...

  • Page 34: Power Exhaust Operation

    Power Exhaust Operation 8. Power Exhaust Operation 8.1. Single Fan or Blower The M2 has several exhaust control options selected by ECTO 8.16. The default operation, option 0, is single−stage ener- gized when the fresh air damper opens to 50% Travel (ECTO 8.20). The blower must be operating. Units equipped with an A133 (GP) board with the DIP configuration switch set to VAV, may control the fan by a building pressure switch (S37 or S39) or a pressure transducer (A34).
  • Page 35 Power Exhaust Operation 2−Stage Exhaust (cont’d) Setpoints # Deadband Option Option Input1 Input1 Input2 Input2 ECTO 8.16 Enabled when Default ECTO Default ECTO Always A133 Digital Input 1 A133 Digital Input 1 A133 Digital Input 2 A133 Digital Input 2 Occupied (P194−1)(TB18−1) (P194−2) (Pressure...

  • Page 36: Supply Air Delivery

    Supply Air Delivery 9. Supply Air Delivery 9.1. Blower Delays The following examples describe blower function for constant air volume (CAV) applications. 9.1.1. Gas / Electric Units: The blower is delayed 40 seconds (default ECTO 3.02) after the gas valve is energized and 120 seconds (default ECTO 3.03) after the gas valve is de−energized.

  • Page 37: Zone Sensor Mode, Single Zone Cav Units

    Supply Air Delivery 9.2.2. Zone Sensor mode, Single Zone CAV Units ECTO 6.01 option 1,2,3 This configuration is used with an L Connection Zone sensor for single zone constant air volume application. Blower cycles with demand unless ECTO 6.17 is set to 1. In that case the blower will operate continuously during occupied periods and cycles with demands during unoccupied periods.

  • Page 38: Local Thermostat Mode, Vav Staged Units

    Supply Air Delivery 9.2.6. Local Thermostat Mode, VAV staged units Staged Speed ECTO 6.01 option 0 (default) or 12; ECTO 6.01 option 0 (default) or 12; Operation Operation ECTO 0.01 option 3 (MSAV) Default ECTO This configuration is a special case application Cooling compressor 1 0.05 where the blower speed is staged by the factory...

  • Page 39: Vav Staged Units: B, C, D, And E Boxes

    Supply Air Delivery 9.2.9. VAV Staged Units: B, C, D, and E Boxes ECTO 0.01 option 3 (MSAV) Staged Speed Operation Default ECTO Cooling compressor 1 0.05 This configuration is a special-case application This configuration is a special-case application Cooling compressor 2 0.14 where the blower speed is staged by the factory where the blower speed is staged by the factory...

  • Page 40: Analog Output Control

    Supply Air Delivery 9.5. Analog Output Control The analog outputs on the GP1 boards can be set to closed loop PID or staged control. Most applications such as variable air delivery and variable speed exhaust fans will use the closed loop PID option. The closed loop PID method used by the M2 has four constants, manual reset (ManRS), proportional (P), integral (I) and derivative (D) as shown in figure 19.
  • Page 41 Supply Air Delivery Start system. Analog output value will be at the ManRS value (%). Monitor system. System should be stable. If system is not stable at this point check for other problems. Adjusting the PID parameters will not solve this problem. If system is stable, gradually increase the P"...

  • Page 42: Discharge Air Control

    Discharge Air Control 10. Discharge Air Control 10.1. Cooling The discharge air control cooling (DACC) option automatically cycles up to 4 stages of cooling to maintain a discharge air control cooling setpoint (DACC_SP). DACC option applies to gas/electric and electric /electric units only; DACC is not allowed with heat pumps units. When an economizer is installed, adjust free cooling setpoint ECTO 6.23 approximately 2 degrees lower than DACC set- point.
  • Page 43 Discharge Air Control For outdoor air based DACC setpoint reset, the discharge air cooling setpoint starts to increase when the outdoor air temper- ature (OAT) drops to the DACC_OAT_RS_SP (ECTO 8.05) (default 80°F). The reset setpoint will continue to increase at the rate equal to the DACC_OAT_RS_Adjustment_Band (ECTO 8.07) divided by the DACC_OAT_RS_Proportional_Band (ECTO 8.06).

  • Page 44: Discharge Air Cooling Total Reset Limit

    Discharge Air Control To use example values, set the following parameters: ECTO 8.02 – DACC_RAT_RS_SP – Set to 70°F ECTO 8.03 – DACC_RAT_RS_Proportional_Band – Set to 10°F ECTO 8.04 – DACC_ RAT_ RS_Adjustment_Band − Set to 10°F (this setting enables DACC return air reset). 10.4.

  • Page 45: Heating

    Discharge Air Control Control Parameter Control Value Name Min. Default Units Description DACC_OAT_ Counts Discharge Air Control Cooling outdoor ambient temperature cooling proportional 8.06 RS_ Proportion- O:DegF band. Also used to reset free cooling setpoint (6.23). al_ Band. DACC_OAT_ Discharge Air Control Cooling outdoor temperature ambient cooling adjustment Counts 8.07 RS_ Adjust_...

  • Page 46: Return Air Reset

    Discharge Air Control EXAMPLE: The application calls for the discharge air control heating occupied setpoint (DACC_OCP_SP) (ECTO 7.10) to be 110°F when OAT is 40°F or lower. When the OAT rises above 40°F, the setpoint needs to decrease proportionately with the OAT increase (maximum setpoint increase of 10°F).

  • Page 47: Discharge Air Control Heating Total Reset Limit

    Discharge Air Control 10.8. Discharge Air Control Heating Total Reset Limit ECTO 8.08 (default=10) defines the total DACH setpoint reset limit. This total limit is the sum of both return and outdoor DACH resets. This parameter limits total DACH_SP adjustment band and overrides the adjustment bands for RAT and OAT (ECTO 8.11 &...

  • Page 48: Third−Party Zoning

    Third−Party Zoning 11. Third−Party Zoning The M2 has many features which allow easy interface with third−party VAV or bypass damper changeover zoning systems. See Figure 26 for a VAV unit wiring summary and figure 27 for a CAV unit w/CAVB wiring summary. In addition to providing VFD control (VAV units) and bypass damper control (CAV units), the M2 provides discharge air con- trol for cooling and/or heating.
  • Page 49 Third−Party Zoning 11.4. DACC Outdoor Air Reset The outside air reset saves energy by gradually increasing the discharge air setpoint as the outside air temperature de- creases. 11.5. DACC Return Air Reset The return air reset reduces the possibility of overcooling by gradually increasing the discharge air setpoint as the return air temperature decreases.
  • Page 50 Third−Party Zoning able 33. Air Delivery Setup for CAV w/Bypass for Changeover Zoning Applications ECTO Default Setting Name Setting Required Description Supply_VAV_ Sets PID control of bypass damper for all modes, ventilation, cooling, heating 0.01 Control_ Mode and smoke alarms. Select (Recommend 0.10 PID_P_ Constant...
  • Page 51 Third−Party Zoning ECTO Default Setting Name Setting Required Description Air Delivery Setup For VAV Zoning Applications − continued ECTO Default Name Setting Required Description Setting Select (Recommend 0.10 PID_P_ Constant PID Proportional constant default) Select (Recommend 0.11 PID_I_Constant PID Integral constant default) Select (Recommend 0.12...
  • Page 52 Third−Party Zoning ECTO Default Setting Name Setting Required Description Discharge Air Control Setup for Heating Option 1 sets control to operate discharge air control heating when W1 is 5.09 HT_Staging energized. 7.10 DACH_OCP_SP Select 80−140F Discharge Air Control Heating setpoint during occupied period. 7.11 DACH_UnOCP_ SP Select 80−140F...
  • Page 53 Third−Party Zoning ECTO Default Setting Name Setting Required Description Power Exhaust Setup Single stage (controlled by A55_P265−2 output) Mode Enable Input 0− Blower D_POS Use ECTO 8.20 and 1− Always A133_P149−1 8.21 for setpoint and 2− A133_P194−1 deadband. 3− Blower A133_P194−1 Use ECTO 8.17 for 4−...
  • Page 54 Lennox M2 and a LonWorks network. The module translates input and output variables between the Lennox protocol and the LonTalk protocol. The M2 LonTalk module has ® been developed to communicate with building automation systems that support the LonMark Space Comfort Control (SCC) or Discharge Air Control (DAC) functional profiles.
  • Page 55 12.1. M2 BACnett Module The optional M2 BACnet Module allows communication between the Lennox M2 (M2, version 6.00 and higher) and a BAC- net MSTP network. The BACnet module conforms to the BACnet application specific controller (B−ASC) device profile. A Lennox non−communicating zone sensor, a BACnet network zone sensor, or a BACnet thermostat may be used to send the...
  • Page 56 BACnet® 12.4. Analog Output Objects Optional Properties Supported: Min_Pres_Value, Max_Pres_Value Optional Writable Properties: Out_Of_Service Analog output object’s Overridden status flag set if the equivalent setpoint in the M2 is written to by an Sbus device. Table 34. Analog Output Objects List Object ID Object Name Units...
  • Page 57 BACnet® Table 36. Analog Input Objects List Object ID Object Name Units Data Range Mac Address None 0 − 127 M2 Address None 1−31 200* M2 Version[4] None 0 − 127 201* M2 Version[5] None 0 − 127 202* M2 Version[6] None 0 −...
  • Page 58 Modulating Gas Valve (MGV) 13. Modulating Gas Valve (MGV) Units equipped with optional modulating gas valves (MGV) contain two modulating gas valves in addition to two standard gas valves. 13.1. Operation The M2 will control modulating gas valves to maintain 110°F (default) discharge air during the heating cycle. The left heat section will operate when 25−50% of nameplate heat is needed.
  • Page 59 Load Shedding Options 14. Load Shedding Options The M2 may be setup to de−energize half of the mechanical cooling provided by a rooftop unit. A digital input to either the economizer (A55_P297−9) or the (A133) GP1 board is required. This option is set by adjusting ECTO 7.25. See table 37. Table 37.
  • Page 60 Service Relay 15. Service Relay 15.1. Service Relay Operation The M2 Service Relay output (A55_P298−8) default operation indicates that service is required. Table 40 indicates these critical alarms with an asterisk. If the default operation is not required, the Service Relay output may be used as a control output. Use ECTO 7.22 to choose the input which will trigger the Service Relay output.
  • Page 61 Service Relay Example 1: Use the Service output to energize a dehumidifier at 60% RH and turn off at 55% RH. (Refer to figure 31.) 1. Determine: ECTO 7. 22− Input Source X to option 7" (RH) Dehumidifier On Algorithm Y to option 0" (hysteresis loop) Inversion Z option 0"...
  • Page 62 When an event occurs, the M2 Unit Controller will display a code which corresponds to control function. See table 40. Error codes are stored and can be recalled later. See the Installation & Setup Guide For The Prodigy M2 Unit Controller for infor- mation about viewing and silencing the alarms via the user interface.
  • Page 63 Diagnostics Code Display Message Action ALARM(31) STRIKE 3 UNIT SHUT- CHECK OVERFLOW SW DOWN S149 ALARM(32) COMP 1 FRZSTAT OPEN COMP OFF. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, OUT- SIDE TEMP ALARM(33) STRIKE 3 COMP 1 COMP LOCKOUT. CHECK FRZSTAT, AIR FLOW, CHARGE, COIL, FILTER, FRZSTAT OPEN S49 OUTSIDE TEMP ALARM(34) COMP 2 FRZSTAT OPEN...
  • Page 64 Diagnostics Code Display Message Action ALARM(62) HEAT 2 LIMIT OPEN HEAT SECT 2 SECONDARY HEAT LIMIT OPEN. CHECK AIR FLOW, LIMIT, S100 AND WIRING. ALARM(63) STRIKE 3 HEAT 2 LIMIT HEAT SECT 2 SECONDARY HEAT LIMIT OPEN. CHECK AIR FLOW, FIL- OPEN S100 TER, LIMIT, AND WIRING.
  • Page 65 CHECK PRODIGY SERVICE TEST MODE TEST Reserved Reserved ALARM(118) NO DISPLAY DISPLAY NOT DETECTED STATUS(119) RESET CAUSED BY CONTACT LENNOX WATCHDOG TIMEOUT ALARM(120) ADD−ON BOARD MCB MCB CONFIGURATION SETUP PROBLEM. RESET TO CLEAR OR AD- PROBLEM VANCED SETUP. ALARM(121) LINE FREQ DOES NOT...
  • Page 66 Electronic Configure To Order (ECTO) Control Parameters 17. Electronic Configure To Order (ECTO) Control Parameters Many M2 main control operations may be varied within a set range. Default settings are based on common or average ap- plications; change ECTO settings only when custom applications, preferences or local building codes exist. Default, mini- mum, and maximum range settings are found in table 41.
  • Page 67 Electronic Configure To Order (ECTO) Control Parameters The unit controller software can directly access a unit by plugging into the M2 board phone jack and connecting to a serial port using a PC converter. Any unit on the same daisy−chained network can be adjusted from any unit M2 board or the NCP. A LAN ethernet converter and phone modem are also available for remote connections.
  • Page 68 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description B, C, D, & E BOXES Block 0 VAV, CAVB, & MSAV Parameters (continued) VAV_Min_Out- VAV supply minimum output for cooling, ventilation or smoke. Counts 0.06 put_for_CL_...
  • Page 69 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description B, C, D, & E BOXES Block 0 VAV, CAVB, & MSAV Parameters (continued) A133 (w/DIP set to VAV) Digital Out Mode = X + 32*Y + 16*Z Input source= X: 0−...
  • Page 70 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 1 Heat Pump Heating Parameters Warm−up time delay. The time that the supplemental heat is held off Counts 1.01 WmUp_Delay during the first demand of warm−up. This parameter is only used if the 1792 8160 D:Sec.
  • Page 71 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 1 Heat Pump Heating Parameters (continued) Supplemental heat stage 1 stage−up timer. The maximum time that Sup_HT_1_ Counts 1.22 stage 1 runs before calling supplemental heat stage 1. StgUp_Timer 3600 F:Sec...
  • Page 72 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 3 Gas Heating Parameters (continued) Counts Time delay before a lower stage turns off following a higher stage 3.12 StgDn_Timer 3600 F: Sec termination.
  • Page 73 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 3 Gas Heating Parameters (continued) GP1 Digital Out Mode = X + 32*Y + 16*Z Input source= X: 0− None. 1− Compressor 1 duty cycle. (Compressor crankcase heater func- tion.) On when OAT <= ECTO 3.22 and >= ECTO 3.23 seconds have passed with compressor 1 off.
  • Page 74 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 4 Cooling Parameters Cool down tine delay. Time that Y2 is ignored during cool down period Counts 4.01 CoolDn_Delay (when first occupied + cool demand) This delay is only used if an 1792 8160 D:Sec.
  • Page 75 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 4 Cooling Parameters (continued) Reheat Control Mode 0− No reheat. 1− Supermarket reheat using De−Humidistat (Tstat mode only) 2− Supermarket reheat using RH sensor. 3−...
  • Page 76 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 5 Miscellaneous Parameters (continued) Cooling staging options: 0− No cooling operation 1− Basic Tstat operation. Two cooling stages. Units with Economiz- ers Y1=FreeCooling, Y2=adds all mechanical stages.
  • Page 77 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 5 Miscellaneous Parameters (continued) Minimum fresh air damper position during occupied operation. Value Min_Damper_ Counts of 101 allows adjustment by potentiometer on economizer board A55 5.24 only.
  • Page 78 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 6 System 1 Parameters (continued) Counts Cooling deadband. Used only with zone sensor applications. 6.08 CL_Stg_DB 3.75 W:DegF Deadband must be < or = 6.15 − 6.07. Counts Heating stage 1 differential.
  • Page 79 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 7 System 2 Parameters Counts Fresh Air Heating stage differential. 7.01 FAH_Stg_Diff V:DegF 0 value for first stage heating only for Fresh Air Heating. Outdoor air temperature setpoint that enables fresh air heating for Reheat_FAH_ Counts...
  • Page 80 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 7 System 2 Parameters (continued) A55 Service Output Control Mode = X + 32*Y + 16*Z Input source = X: 0− None. Standard Service Output based on alarms. 1−...
  • Page 81 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 7 System 2 Parameters (continued) Load shedding option used to disable half of available mechanical cooling. Select the load shedding input signal source: 0−...
  • Page 82 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 8 System 3 Parameters (continued) 8.15 Counts Reserved. Single stage (controlled by A55_P265−2 output) Mode Enable Input 1 0− Blower D_POS USE ECTO 8.20 1−...
  • Page 83 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 8 System 3 Parameters (continued) 10.0 R:Volts Stg_2_SP Staged 2 setpoint. −0.5 −.42 M:"w.c. Exhaust fan PID loop integral constant. The I constant must be limited Exh_Fan_PID_I to 127.
  • Page 84 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 9 Optional A133 Board in GP Mode (DIP switch set to GP) Parameters (continued) AO1_PID_ Counts 9.08 Analog output channel 1 PID loop manual reset value. ManRS AO1_PID_P_ 9.09...
  • Page 85 Electronic Configure To Order (ECTO) Control Parameters Control Parameter Control Value Name Min. Default Max. Units Description Block 9 Optional A133 Board in GP Mode (DIP switch set to GP) Parameters (continued) GP1 Digital Out Control Mode = X + 32*Y + 16*Z Input source = X: 0−...
  • Page 86 Electronic Configure To Order (ECTO) Control Parameters Table 42. ECTO Parameter Code Conversion Table Codes A Through F Sec. Min. Sec. Min. Sec. Min. Min. Hrs. Min. Counts 0.33 0.67 1.33 5.33 0.36 2.67 0.67 1.33 2.67 10.67 0.71 5.33 1.00 2.00 4.00...
  • Page 87 Electronic Configure To Order (ECTO) Control Parameters Table 42. ECTO Parameter Code Conversion Table (continued) Codes P Through Z Diff. Temp. Diff. Temp. Temp. Temp. Temp. Counts 164.45 73.58 131.56 55.31 37.78 0.39 6.79 3.77 2.50 1.39 157.66 69.81 125.20 51.78 97.50 36.39...
  • Page 88 SYS BUS TERMINAL S−BUS TERMINAL BLOCK ON LENNOX BLOCK ON LENNOX BLOCK ON LENNOX CONTROLLERS IMC CONTROLLERS IMC (M1−7, PRODIGY M2 CON- (M1−1 TO M1−6 L M1−8, NTC, BC AND ZONE TROLLER ENER- SERIES) CONTROLLERS) GENCE SERIES − G + −...
  • Page 89 Constant volume units in either single zone or bypass zoning applications can use this control mode. To operate correctly, a Lennox or third−party thermostat or unit control must provide the following wiring connections to the unit controller: 1. Ventilation demand 2.
  • Page 90 Although not as common, constant volume units in either single zone or bypass zoning applications may also use this control mode. To operate correctly, a Lennox or third−...
  • Page 91 19.1.3.2. Occupied Demand Upon receiving occupied and ventilation demands from the Lennox or third party unit controller, the unit controller adjusts the fresh air damper to either a fixed minimum position or allows it to modulate based on a CO2 sensor (demand control ventila- tion).
  • Page 92 19.1.4.1. Unit Controller Operation When using a Lennox zone sensor with the unit controller operating in zone sensor mode, a packaged rooftop unit can provide up to four stages each of mechanical heating and cooling operation. The zone sensor provides space temperature information to the unit controller.
  • Page 93 Sequence of Operation For stage one operation, the unit controller activates the first compressor (25% of total unit capacity). For stage two opera- tion, the unit controller activates the second compressor (50% unit capacity). For stage three operation, the unit controller activates the third compressor (75% total unit capacity).
  • Page 94 Sequence of Operation 19.1.5. Constant Air Volume (CAV) Units in Single Zone Applications with a Thermostat or Third Party Unit Controller (2 Heat / 2 Cool) 19.1.5.1. Unit Controller Operation When using a two−stage heat/ cool thermostat or third party unit controller with the unit controller in the thermostat mode, a packaged rooftop unit can provide up to two stages of mechanical heating and cooling operation.
  • Page 95 The user can adjust the setpoint either locally or remotely with Lennox’ L Connection Network Unit Controller software or at the unit controller board.
  • Page 96 The user can adjust the setpoint either locally or remotely with Lennox’ L Connection Network Unit Controller software or at the unit controller board. The user can not adjust the setpoint through a third party control device or software program.
  • Page 97 Sequence of Operation 3. Heating demand 4. Cooling demand In this configuration, the unit controller controls the rooftop staging and general operation. The third party unit controller only informs the unit controller controller as to whether or not there is a specific demand. For example, if the third party unit con- troller passes along a demand for cooling, then the unit controller increases or decreases cooling stages to maintain the discharge supply air temperature setpoint.
  • Page 98 Sequence of Operation Energence units feature four separate compressor and refrigeration circuits that can provide up to four stages of mechanical cooling operation. For stage one operation, the unit controller activates the first compressor (25% of total unit capacity). For stage two operation, the unit controller activates the second compressor (50% unit capacity). For stage three operation, the unit controller activates the third compressor (75% total unit capacity).
  • Page 99 PLUG, COMPRESSOR 3 AND 4, CONTROL P118 MOTOR, OUTDOOR FAN 5 PLUG, COMPRESSOR 3 AND 4, INPUT P119 F37 AND S39 PRESSURE SWITCH PLUG, I/O FOR A133 LENNOX A133 BOARD MOTOR, OUTDOOR FAN 6 P194 CONTROL MOTOR, EXHAUST BLOWER 1 PLUG, INVERTER EXHAUST BLOWER...
  • Page 100 − − 120 VAC FIELD P R O V I D E D POWER SUPPLY I S R E Q U I R E D NOTE: USE COPPER CONDUCTORS ONLY...
  • Page 101 Table 44. M2 unit controller signal reference diagram 24VAC 24 VAC COM S − BUS P297 P298 P299 − MS 9413−03−401 MS 9413−10−407 MS 9413−10−408 MS 9413−10−409 Pin # Label Description Type Description Part Number P297 Thermostat Assembly MS 9413−10−407 TRANSFORMER 1 24VAC POWER 24VAC Header &...
  • Page 102 Table 45. M2 board connections diagram Pin# Label Description Type P262 Economozer control 24VAC Power 24 VAC Digital Ground 24 VAC COM Damper Control 2−10 VDC DO DPOS Damper Position Feedback 2−10 VDC DI Digital Ground RES 0−5 VDC RES 0−5 VDC RT16+ Return Air Temp Relay Outdoor Fan 2...
  • Page 103 Page 34 Prodigy M2 Unit Controller Description ............
  • Page 104 Abbreviations M2 board. Main RTU control board Indoor enthalpy. Depends on temperature and humidity A133 GP1 Board. General purpose add−on board DIP selects w.c. Inches of water column 3 functions Light emitting diode. An indicator light, found either as in- A169 MCB1 board.

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