KMC Controls FlexStat User Manual

FlexStat 12 Operation Guide, Rev. R
NOTE: Not all applications have a modulating
economizer option. Withoutamodulating
economizerselected,DCVwillnotappear
inanymenus,but the (Advanced) CO
2
Sensor menu will remain and the CO
2
ppm
readings will still show on the display.
NOTE: An alarm is generated when the CO
2
level is
too high for too long. See Alarms on page 23.
NOTE: The various Outside Air (OA) % seings
available are the percentage that the OA
damperisopen and not the percentage
of OA ow. These seings should be
measured and set accordingly.
NOTE: SeetheDCVsectionintherelevant
SequenceofOperationoftheFlexStat
ApplicationGuideformoreinformation
aboutthemodesandoptionsdescribedin
generaltermshere.
ThethreetypesofDCVcongurationsavailable
are:
• BASICDCV—Provides simple DCV, modulat-
ing the outside air damper in direct response to
the current CO
2
level with respect to its setpoint.
Basic DCV is much more energy ecient than no
DCV at all, while maintaining adequate IAQ (In-
door Air Quality). It is the easiest DCV method
to congure. However, where VOCs, radon, or
other pollutants become excessive during unoc-
cupied times (with no ventilation), the FlexStat’s
Standard or Advanced DCV conguration is
recommended.
CO
2
Setpoint
0%
Space CO
2
CO
2
Maximum
DCV Signal
Component
to OAD
100%
Basic DCV Configuration
CO
2
Base
Outside Air
Damper
Position
Component
STANDARDDCV—When the BAC-13xxxx seings
are properly congured, this complies with
CATitle24,Section121(c). This would
also apply to a properly congured BAC-
12xxxx with a remote SAE-10xx CO
2
sensor.
Standard DCV, under most conditions, is
somewhat less energy ecient than Basic,
but it enhances IAQ.*
*NOTE: The CO
2
sensors in the BAC-13xxxx series
FlexStats (as well as properly congured
SAE-10xx CO
2
detectors) have been certied
to comply with CA Title 24, Section 121(c),
as well as sub-paragraph 4.F that species
accuracy will be maintained within
tolerance for a minimum of 5 years without
recalibration. Seethedatasheetformore
information.
CO
2
Setpoint
OA Full
OA Area
0%
Space CO
2
CO
2
Maximum
DCV Signal
Component
to OAD
100%
Standard DCV Configuration
CO
2
Base
Outside Air
Damper
Position
Component
“Basic” Signal
“Standard”
Signal
• ADVANCEDDCV—When the seings are
properly congured, this conguration complies
with CATitle24,Section121(c) and ASHRAE
Standard62.1-2007 and follows guidelines by
PortlandEnergyConservation,Inc.(PECI).
Although Advanced DCV is the most complex to
congure, it is more energy ecient than Stan-
dard while still optimizing IAQ.
OA Max
OA Full
OA Area
0%
Space CO
2
CO
2
Maximum
DCV Signal
Component
to OAD*
100%
Advanced DCV Configuration
CO
2
Base
Outside Air
Damper
Position
Component
*Under Normal
Vent Mode operation
(see Vent Mode description)
NOTE: The three graphs above show the DCV
component of the signal to the outside
air damper. Depending on the conditions
and the DCV conguration, the signal
to the damper might be controlled by
Minimum Position, Economizer Loop, or
other components. The maximum of these
component values is used, not the sum

KMC Controls FlexStat Specifications

General

Brand	KMC Controls
Model	FlexStat
Category	Thermostat
Language	English