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Table 64. M3 Control Parameters
Control Parameter
DescriptionUnits
Control Value
No DescriptionUnitsMax.DefaultMin.Parameter Short DescriptionScreen Name
287 ALGORITHMS ENABLED Algorithms Enabled
Note: Options for Parameter 287 are not accessible via the M3 Unit Controller user interface. Options can be set using the
Lennox UC software. Default set bit is 0x00000300.
Set Bit Description
0x00000002 Enable Fresh Air Heating (ALGO_FAH)
0x00000004 Enable Fresh Air Cooling (ALGO_FAC)
0x00000008 Enable DACC Return Air Reset (ALGO_DACC_RAT_RESET)
0x00000010 Enable DACC Outdoor Air Reset (ALGO_DACC_OAT_RESET)
0x00000020 Enable DACH Return Air Reset (ALGO_DACH_RAT_RESET)
0x00000040 Enable DACH Outdoor Air Reset (ALGO_DACH_OAT_RESET)
0x00000080 Enable Supply Static Pressure Sensor Alarm (ALGO_LO_STATIC_PRESSURE_ALARM)
0x00000100 Enable Low Outdoor Temp override of DCV/OAC operation (ALGO_LO_OAT_DCV_OAC_OVERRIDE)
0x00000200 Enable High Outdoor Temp override of DCV/OAC operation (ALGO_HI_OAT_DCV_OAC_OVERRIDE)
0x00000800 Enable Free Cooling Blower Stage Up
Here is an example of the selection options for
Algorithms Enable via the Lennox UC Software.
305 LON HEARTBEAT TIME LonTalk Heartbeat Time 0 100 3600 Seconds
306 ZON SNSR CAL OFFSET Zone Sensor Calibration Offset -5 0 5 °F This setting is applicable to local temperature sensor only.
313 FAH REHEAT MODE Fresh Air Reheat Mode 0 0 3 OPTION
0 = Disabled
1 = Allowed, must be occupied.
2 = Allowed, blower must be energized and in occupied mode.
3 = Allow. No conditions apply.
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