Appendix A: TV-VAVB3-E2 Points/Properties
TruVu™ VAVB3
-E2
CARRIER CORPORATION ©2022
Installation and Start-up Guide
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131
Environmental Index
Environmental Index (EI)
–
Initial
Occupied
value is 100%. A value of 0% means the zone
is
Unoccupied
. If the space temperature deviates from
Effective Heat Setpoint
and
Effective Cool Setpoint
range, the value is derated. EI supports an optional RH and/or
CO
2
sensor. The RH and/or CO
2
values could also derate an EI.
R:
0 to 100%
EI Time Satisfied
–
Percentage of
Occupied
time during which a zone maintains an EI of
70% or higher.
R:
0 to 100%
Weighted EI
–
Determines the priority of a zone in an EI roll-up, which must be
completed using a different control program.
R:
0 to 100000.0
EI Total Weight
–
Current
EI Weighting Factor
used to scale the
Weighted EI
.
R:
0 to 1000.0
EI Decreased By
–
Source(s) of an EI value reduction.
Options:
Temp
–
EI decreased by Space Temperature
Temp & RH
–
EI decreased by Space Temperature and Relative Humidity
Temp, RH, & CO2
–
EI decreased by Space Temperature, Relative Humidity, and CO2
RH
–
EI decreased by Relative Humidity
RH & CO2
–
EI decreased by Relative Humidity and CO2
CO2
–
EI decreased by CO2
Temp & CO2
–
EI decreased by Space Temperature and CO2
None
–
No source(s) decreasing Environmental Index value
R:
Temp
Temp & RH
Temp, RH, & CO2
RH
RH & CO2
CO2
Temp & CO2
None
EI Space Temp Setpoint Tolerance
–
Expands the ideal heating and cooling setpoint
range for EI temperature sensitivity.
D:
R:
0.5 °F (.27 °C)
0 to 5 °F
(0 to 2.7 °C)
EI Humidity Low Limit
–
Setpoint value that relative humidity must drop below in order to
decrease an EI Value.
D:
R:
30%
0 to 100%
EI Weighting Factor
–
Creates a weighted average of a zone EI value by indicating the
priority of that zone in an EI roll-up. A value of 0 disables the zone from an EI roll-up.
D:
R:
1
0 to 1000.0