Building Automation Products, Inc., 750 North Royal Avenue, Gays Mills, WI 54631 USA
Tel:+1-608-735-4800 • Fax+1-608-735-4804 • E-mail:[email protected] • Web:www.bapihvac.com
Specifications subject to change without notice.
3 of 4
Installation & Operating Instructions
rev. 08/21/17
28173_ins_CO2_Duct
CO
2
Duct and Rough Service Sensor
Termination
BAPI recommends using twisted pair of at least 22AWG and sealant filled connectors for all wire connections. Larger
gauge wire may be required for long runs. All wiring must comply with the National Electric Code (NEC) and local
codes. Do NOT run this device’s wiring in the same conduit as AC power wiring. BAPI’s tests show that fluctuating
and inaccurate signal levels are possible when AC power wiring is present in the same conduit as the signal lines.
The CO
2
outputs may
be field configured for
0 to 5 VDC or 0 to 10
VDC outputs at any
time. Set the jumpers
on J3 as shown in
Figures 7 and 8.
Fig. 7:
J3 set for 0
to 10 VDC output
Fig. 8:
J3 set for 0
to 5 VDC output
Terminal
Function
PWR
............... 12 to 24 VDC, 240mA
18 to 24 VAC, 12 VA Peak
GND
................ To controller Ground [GND or Common]
OUT
................ Voltage Output, CO
2
Signal
0 to 5 or 0 to 10 VDC, Referenced to GND
Note: Unit is not ready for operation until the 10 minute start-up time has elapsed.
Note: For proper operation, the
jumper on calibration connector J2
must be connected to one leg.
Fig. 6:
Circuit Board
BAPI recommends wiring the product with power disconnected. Proper supply voltage, polarity, and
wiring connections are important to a successful installation. Not observing these recommendations may
damage the product and will void the warranty.
VC350A or VC350A-EZ
Voltage Converter
(VC350A shown below)
CO
2
Sensor
POWERING WITH A BAPI VC350A
VOLTAGE CONVERTER
The CO
2
unit requires 240mA of current
to operate correctly. If this is more
current than can be provided by the
controller power output, then the unit
can be powered by a BAPI VC350A or
VC350A-EZ Voltage Converter.
Fig. 9:
Powering with
a BAPI VC350A
