Load Shedding Options - Lennox Prodigy 2.0 Application Manual

Property Property ID
Object_Identifier
Object_Name
Object_Type
Object_Temperature 534
Object_Relative_
536
Humidity
Object_CO2_Level 537
Table 53. Lennox Proprietary Objects - Outdoor Air (Object ID: 133)
Property Property ID
Object_Identifier
Object_Name
Object_Type
Object_Temperature 534

13. Load Shedding Options

The M3 Unit Controller may be setup to de-energize part or all of the mechanical cooling provided by a rooftop unit.
Configuration ID 2, position 8 defines where the digital input for load shedding is configured.
Go to SETUP > INSTALL > Configuration ID1, position 8 will need to be set to one of the following options:
N - NOT INSTALLED
G - GLOBAL INPUT (A55-P297-9)
L - DI-2 (DIGITAL INPUT 2 - A55 - P299 - 4)
U - DI-3 (DIGITIAL INPUT 3 - A55 - P299 - 6)
NOTE - When L or U options are enabled on either DI-2 or DI-3, the following switch connections are not allowed (A42, S42
and S149). Similarly option G (Global input) may be used only if economizer global mode is not enabled.
Parameter 194 - select 0 - 15. This parameter defines how many compressors are turned off when load shedding is active
(i.e., digital input ON; contact closed).
Control Parameter
No Screen Name
194 LOAD SHED NUM COMP
Table 52. Lennox Proprietary Objects - Space Air (Object ID: 133)
Data type and range
75 Integer (0-4194302)
Character string of 1 character (min.)
77
to 32 characters (max.)
133
79
(OBJECT_LNX_INDOOR_AIR)
Real: Degrees Fahrenheit (36.25 to
100)
Real: Values are 0 to 100 (%RH)
Real: Values are 300 to 2000 (PPM)
Data type and range
75 Integer (0-4194302)
Character string of 1 character (min.)
77
to 32 characters (max.)
133
79
(OBJECT_LNX_OUDOOR_AIR)
Real: Degrees Fahrenheit (-30.62 to
131.56)
Table 54. M3 Load Shedding Options
Parameter
Short
Description
Min.
Number of
compressors
0
to shed during
load shedding
Access Description
Numeric code that identifies the object (unique within
Read Only
Lennox BACnet Device)
Identifies the Object and is unique within the BACnet
Read Only
Device.
Read Only Indicates membership in a particular object type class.
Read Write Indicates the temperature of the space air.
Read Write Represents relative humidity of space air.
Read Write Indicates the CO2 levels in the space air.
Access Description
Numeric code that identifies the object (unique within
Read Only
Lennox BACnet Device)
Identifies the Object and is unique within the BACnet
Read Only
Device.
Read Only Indicates membership in a particular object type class.
Read Write Indicates the temperature of the outdoor air.
Control Value
Default Max.
0 15 Option
Page 68
Units Description
Number of compressors to be turned off
when load shedding is active.