(Advanced) Co 2 Sensor (And Dcv); Co 2 Sensor Setup And Information; Advanced) Co Sensor (And Dcv); Co Sensor Setup And Information - KMC Controls FlexStat Operation Manual

(Advanced) CO Sensor (and DCV)
2
CO2 SENSOR
SENSOR INFO
CALIBRATION
CO2 SENSOR INFO
MODEL: T6615
SUB VOL: A15
SW DATE: 090217
S/N: AB00011759
CO2: 873
ELEVATION: 0
STATUS: NORMAL
CO Sensor Setup and Information
2
NOTE: Set the desired CO
Setpoints menu. See
For maximum sensor accuracy, enter the elevation
(altitude) above sea level of the building's location.
(The default value is 0.) Elevation for any particular
location can be found at such sources as
tools.org. (For very tall buildings, the upper floors
would have a higher elevation than lower floors.)
After power is first applied or the FlexStat is restart-
ed, the sensor goes through a warm-up for approxi-
mately half a minute. During the time the sensor
count will be 0 ppm and the Status line will display
WARMUP instead of NORMAL.
The sensor and its firmware are identified by the
model, the compilation subvolume (SUB VOL), com-
pilation date (SW DATE in yymmdd format), and
serial number.
NOTE: With the CO
2
automatically generated. See
Trend Logs on page
The BAC-13xxxx models do not have a calibration
with gas option. It uses Automatic Background
Logic, or ABC Logic , a patented self-calibration
™
technique designed to be used in applications where
concentrations will drop to outside ambient condi-
tions (approximately 400 ppm) at least three times
in a 14 day period, typically during unoccupied
periods.
The BAC-14xxxx models have a calibration option
for applying gas to the sensor for maintaining maxi-
mum accuracy. These models have a dual channel
sensor (a CO channel measures gas concentration,
2
and a reference channel measures the sensor signal
intensity). Self-calibrations are performed approxi-
mately every 24 hours using the reference channel.
FlexStat
CO2 CALIBRATION
ELEVATION: 0
REFERENCE GAS: 300
MODE: MONITOR
CO2: 1067
STATUS: NORMAL
CAL TIME: 00:00
setpoint under the
2
Setpoints on page
www.earth-
sensor enabled, a trend log is
(Advanced)
20.
During the self-calibration the sensor PPM reading is
frozen and will not react to changing CO
For instructions on calibrating the BAC-14xxxx
models with gas, see the CO
tion in the FlexStat Application Guide.

DCV (Demand Control Ventilation) Setup

DAMPER SETUP
ECON:
MODULATING
DCV: ADVANCED
DCV SETUP
MIN POSITION: 0%
CNTRL (0–100%): 2–10 V
VENT MODE: STARTUP
ECON ENBLE TEMP: 55° F
DCV DAMPER SETUP
LOW LIMIT ALARM: 45° F
CO2 MAX (PPM): 1000
CO2 BASE (PPM): 400
25. OA AREA: 2%
OA FULL: 5%
OA MAX: 40%
The CO sensor is used with DCV (Demand Control
2
Ventilation sequences to provide optimal ventila-
tion and energy savings for a space. When BAC-
12xxxx/13xxxx/14xxxx models have an application
with the CO sensor AND a modulating economizer
2
option enabled, menu items for DCV (Demand Con-
trol Ventilation) will appear. Most DCV settings are
accessed from the Damper setup menu. See
Setup on page 7,
mand Control Ventilation) on page
Although BAC-12xxxx FlexStats do not have a built-
in CO sensor, they still have DCV control sequences
2
available. When DCV is enabled in the Damper
Setup menu of these models, IN9 is assumed to be
connected to an external SAE-10xx CO
space) sensor. 0–5 VDC on that input (configured
in the (Advanced) Inputs
ppm. The output of the connected SAE-10xx must
also be configured to match the FlexStat's input (see
the installation guide for the appropriate SAE-10xx
model), and the FlexStat's IN9 pull-up resistor must
be set for 0–12 VDC (see the appropriate FlexStat
installation guide)! BAC-13xxxx/14xxxx FlexStats
also have the external sensor option, and if used, the
highest of the two readings (internal vs. external)
will be used to control DCV sequences. The CO
display (if enabled) also shows the highest of the two
levels. (Allow at least 15 minutes after installation for
the reading to stabilize.)
11
Sensor Calibration sec-
2
DCV SETUP
DCV SETUP
OA PURGE: 0%
OA LOW VENT: 65°F
OA HIGH VENT: 80°F
FAN MAX OFF (MINS): 30
CLG DESIGN TEMP: 95°F
HTG DESIGN TEMP: 20°F
VENT OVRIDE (MINS): 30
Setpoints on page 25, and
24.
2
menu) will map to 0–2000
Operation Guide, Rev. R
.
2
Damper
DCV (De-
(duct or
ppm
2