Dcv (Demand Control Ventilation) - KMC Controls KMCConquest FlexStat BAC-19 Series Sequence Of Operation

DCV (DEMAND CONTROL VENTILATION)

BAC-195xxx and BAC-193xxx model FlexStats in-
clude CO sensors for DCV operation in (6/3) RTU,
2
HPU, 4-pipe FCU, and (3/6) AHU applications with
an outside air damper. See the illustrations and
descriptions below of Basic and Standard DCV op-
tions and operation.
Basic DCV Mode
100%
Outside Air
Damper
Position
Component
0%
Menu
Description
Options
CO Level
2
Select DCV DCV
Mode Mode
Basic DCV CO2 Basic
Setpoint Setpoint
Basic DCV CO2 Basic
Deadband Deadband
Standard
DCV Baseline
(Outside Air
CO Level)*
2
Standard
DCV Start
Point*
Standard
DCV Maxi-
mum Allowed
CO Level*
2
*NOTE: Standard DCV values are self-calculating and are not configurable by the user in the FlexStat menu.
BAC-19xxxx FlexStat Sequence of Operation and Wiring Guide
DCV Signal
Component
to OAD
CO Space
2
Deadband
CO
(AV58)
(AV57)
CO
2
Setpoint
(AV59)
DEMAND CONTROL VENTILATION
Available as a rotation value on the display.
Select None, Basic, or Standard.
In Basic DCV mode, the desired CO
economizer damper opens for maximum outside air flow.
In Basic DCV mode, the amount the CO
the setpoint before DCV control is relinquished (and outside DCV
air flow returns to minimum).
In Standard DCV mode, the presumed average CO
tion level of outside air at the building's location. Every week af-
ter installation, the lowest detected reading in the previous week
is written into AV60 (replacing the original default or previous
value).
In Standard DCV mode, the CO
economizer damper begins to modulate open. It equals the DCV
CO baseline plus 200 ppm, and the value is recalculated weekly.
2
In Standard DCV mode, the maximum allowed CO
tion level during an occupied period. The economizer damper
modulates to fully open at this level. It equals the DCV CO
line plus 600 ppm, and the value is recalculated weekly.
See the BAC-19xxxx FlexStat Application Guide
for more information. See also:
• Air Handling Unit (BAC-19xx36) on page 4
• Heat Pump Unit (BAC-19xx63) on page 15
• (4-Pipe) Unit Ventilator (BAC-19xx36) on page
12
• Roof Top Unit (BAC-19xx63) on page 18
100%
Outside Air
Damper
Position
Component
2
0%
Notes
level at which point the
2
level must drop below
2
level (setpoint) at which the
2
3
Standard DCV Mode
DCV Signal
Component
to OAD
CO CO
2 2
Base Start Point
(AV60) (AV61)
Default
Value
0 ppm
None
1200
ppm
200
ppm
concentra-
2
380
ppm
580
ppm
concentra-
2
980
base- ppm
2
Space
CO
2
(AV57)
CO
2
Max (Setpoint)
(AV62)
DCV
Object
Mode
AV57
MSV12
AV59
Basic
AV58
AV60
Stand-
AV61
ard
AV62
AG200123C