Lennox PRODIGY2.0 - 23. M3 Unit Controller Inputs and Outputs; 23.1. General

Lennox PRODIGY2.0

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23. M3 Unit Controller Inputs and Outputs

Figure 31. Wiring Diagram

Table of Contents

Default Chapter1
- Table of Contents1
1 Prodigy 2.0 - M3 Unit Controller Description7
- Unit Sizes7
- Add-On Controllers7
- M3 Unit Controller Layout and Connections8
2 Main Controller Operation9
- Control Type - Thermostat9
  - Cooling Stages9
  - Heating Stages10
- System Mode - Room Sensor Backup Mode Set Points11
3 Unit Component Operation16
- Compressor Protection and Delays16
- Gas Units Burner Protection and Delays18
- Miscellaneous Components19
- Gas Heat Operation-Gas Units22
  - Heat Speeds22
- Electric Heat Operation-Electric / Electric Units22
  - Electric Heat Stage Delay Operation22
  - Primary or Secondary Limits22
4 Sensors23
- Temperature Sensors - Provided with Unit23
- Room Sensor - Optional23
- Relative Humidity Sensor - Optional23
- Carbon Dioxide (Indoor Air Quality) Sensor - Optional23
- Supply Static Pressure Sensor - Optional24
- Enthalpy Sensor - Optional24
- Economizer Differential Pressure Sensor - Optional24
5 Outdoor Fan Operations25
- High Ambient Conditions25
  - Energence Ultra-High Efficiency (7-1/2- to 20-Ton)25
- Normal Ambient Conditions25
- Low Ambient Conditions (S11, S84, S85 and S94)25
  - Energence Standard Efficiency (3- to 5-Ton) and High Efficiency (6-Ton)25
  - Energence High Efficiency (3- to 5-Ton)25
- Compressor / Fan Configurations26
- Low Ambient Outdoor Fan Control and Cycling27
6 Dehumidification Operation33
- Supermarket Reheat Operation Settings33
- Humiditrol Dehumidification Operation - (Humiditrol® Reheat)33
- Third Party Digital Input to Control Dehumidification35
- Outside Air for Dehumidification35
- Selecting Minimum Low and Minimum High Damper Positions35
- Compressor and Humiditrol Operation36
7 Increased Dehumidification Operation - Energence Ultra-High Efficiency (3- to 6-Ton)43
- Increased Dehumidification in Wired Thermostat Mode43
- Increased Dehumidification in Room Sensor Mode43
  - Increased Dehumidification Without a Cooling Demand43
  - Increased Dehumidification with a Cooling Demand43
- How to Enable or Disable Increased Dehumidification Mode44
8 Economizer45
- General45
- Enabling Economizer and Settings45
- Damper Operation During Free Cooling45
- Free Cooling Compressor Lockout Mode and Low Ambient Set Point45
- Outdoor Air Suitable for Free Cooling45
- Enthalpy Set Point46
- Free Cooling Damper Maximum Position46
- Minimum Damper Position46
- Closing Damper and Calibration46
- Motorized Outdoor Air Damper46
- Economizer Checkout47
9 Demand Control Ventilation (DCV)49
- General49
- Default Operation49
- Maximum and Minimum Demand Control Ventilation Damper Settings49
- Parameter Adjustments50
  - Set Point Control Option50
  - Determining Indoor Air Quality Inputs51
10 Outdoor Air Control (OAC)52
11 Building Pressure Control (BPC)53
12 Power Exhaust Operation54
13 Supply Air Delivery55
- Blower Delays55
- Supply Constant Air Volume (CAV) Control Mode55
- Supply Multi-Stage Air Volume (MSAV) Control Mode55
- Variable Frequency Drive Control55
- Supply Constant Air Volume (CAV) with Zone Bypass Damper Control56
  - Bypass Damper Actuator56
  - Analog Output Control57
14 Discharge Air Control59
- Cooling59
- Heating62
15 Third-Party Zoning65
- Air Delivery Operation65
- Occupied /Unoccupied Operation65
- Cooling Operation65
  - Discharge Air Control Cooling Outdoor Air Reset65
  - Discharge Air Control Cooling Return Air Reset65
- Heating Operation65
  - Discharge Air Control Heating Outdoor Air Reset66
  - Discharge Air Control Heating Return Air Reset66
- Power Exhaust Operation66
- Supply Bypass Damper Control66
16 Bacnet67
- M3 Unit Controller Bacnet® Module67
- Recommendations67
- Default Settings67
- Analog Output Objects68
- Analog Value Objects69
- Analog Input Objects70
- M3 Unit Controller Bacnet Module Installation74
- Comfort Sensors75
17 Lontalk76
- Setup76
- Comfort Sensors76
50 L Connection Network77
- Controllers77
19 Load Shedding Options78
20 Service Relay79
- Service Relay Operation79
- System Relative Humidity Options79
- System Indoor Air Quality / Carbon Dioxide Options79
- System Outdoor Air Temperature Operation79
21 Advanced Airflow System (Smart Airflow&#X99;)81
- Calibration81
- Supply Airflow Measurement and Control81
- Outdoor Airflow (OA) Measurement and Control82
  - Ventilation Errors82
  - Damper Diagnostics82
22 Sequence of Operation83
- Unit Controller Control Modes83
- CAV Units in Single-Zone Applications with a Lennox Room Sensor87
- CAV Units in Single-Zone Applications - Wired Thermostat or Third-Party Unit Controller88
23 M3 Unit Controller Inputs and Outputs93
24 M3 User Interface Menu Tree and Display Status Screen94
- Menu Tree (Level 1)94
- Menu Interface Details95
- System Status Screen107
- LED Operations109
25 Model Number and Configuration ID 1 and 2110
- Model Number110
- Configuration ID 1111
- Configuration ID 2112
26 M3 Unit Controller Parameters113
- Reset to Factory Parameters113
- Unit Controller PC Software113
27 M2 ECTO to M3 Parameter Cross-References140
28 Events and Alarms147
- Phase - Voltage Detection147
- M3 Unit Controller Alarm and Event Codes147
29 Abbreviations157
30 Controller Signal References159
- M3 Unit Controller159
- GP3 Control162
- C3 Control162
31 Prodigy 2.0 Release History164

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