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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—196
DisMinHtTime nciConfig DisableHeatMinTime FALSE
TRUE
0
1
FALSE P X X If DisableHeatMinTime is 0 (FALSE), the heating stages are on or off for a
minimum time determined by ubHeatCph (Refer to Table 17 Interstage
Minimum Times of the System Engineering Guide). If DisableHeatMinTime
is 1 (TRUE), the heating stages are on or off for a 30 second minimum
time.
DisMinClTime nciConfig DisableCoolMinTime FALSE
TRUE
0
1
FALSE P X X If DisableCoolMinTime is 0 (FALSE), the cooling stages are on or off for a
minimum time determined by CoolCph (Refer to Table 17 Interstage
Minimum Times of the System Engineering Guide). If DisableCoolMinTime
is 1 (TRUE), the cooling stages are on or off for a 30 second minimum
time.
CascCntrl nciConfig CascadeControl FALSE
TRUE
0
1
FALSE P X X When CascadeControl is 0 (FALSE), then the discharge air temperature is
not directly controlled and heating and cooling equipment are modulated to
maintain space temperature. When CascadeControl is 1 (TRUE), then the
discharge air temperature is controlled by an additional control loop based
on the error signal from the space temperature control loop. Cascade
Control is applicable to modulating heating/cooling only (not staged).
UseRaTempCtl nciConfig ControlUsesRtnAirTemp FALSE
TRUE
0
1
FALSE P X X If ControlUsesRtnAirTemp is a 0 (FALSE), then Data2.SpaceTemp is set
equal either the space temperature sensor (IO.siSpaceTemp) or
SpaceTemp depending on the value of SpaceTemp. When
ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is SI_INVALID, then
Data2.SpaceTemp is set equal to return air sensor (IO.ReturnTemp) and
the control uses the return air sensor to control heating or cooling. When
ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is not SI_INVALID,
then Data2.siSpaceTemp is set equal to SpaceTemp and the control uses
SpaceTemp to control heating or cooling.
IaqUseHeat nciConfig IaqUseHeat FALSE
TRUE
0
1
FALSE P X X When the effective occupancy is OC_OCCUPIED and IaqUseHeat is 0
(FALSE), then no heating stages or modulating heating are turned when
the discharge air temperature goes below the low limit. Energy has priority
over ventilation. When the effective occupancy is OC_OCCUPIED and
IaqUseHeat is 1 (TRUE), then the heating stages or modulating heating
are turned on to prevent the discharge air temperature from going below
the discharge air temperature low limit. Ventilation has priority over energy
cost.
Table 25. Configuration Parameters. (Continued)
User Address NvName Field Name
Engineering Units: English
(Metric) or States plus Range
Digital State or
Value of State
Default
E-Vision (M, P, S)
Share
Map
Direct Access
Hardware Config.
Manual Config.
Test
E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic
NOTE: Physical I/O points that are configurable are in Table 20.
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