Orion System OE217-00 - Manual (Page 34)

Form: ORION-OE256-02-DuctMtdCO2Sensor-1A.doc
Page 1 of 1
Description
The OE256-02 Duct Mounted CO
2
Sensor
is used in conjunction with the VCM-X Con-
troller (OE332-23-VCMX) to monitor and
control CO
2
levels in the building environ-
ment. It can be configured via its address
switch to be either a Supply Air CO
2
Sen-
sor or Return Air CO
2
Sensor as required.
Some typical applications are:
•
Demand Control Ventilation
•
Controlling ventilation in a building
where the occupancy varies fre-
quently
•
Controlling ventilation based on CO
2
levels to ensure excess outdoor air is
not causing energy waste
•
To ensure good air distribution
throughout building zones
The OE256-02 is used for monitoring duct
CO
2
levels and is designed for permanent
duct mounting in the Supply or Return Air
duct. It utilizes an aspiration box to accu-
rately capture CO
2
levels in the Supply or
Return Air duct. It connects to the VCM-X
by using a modular prefabricated cable with
RJ-45 connectors. It can be daisy chained
with the Orion Modular Room Temperature
Sensor or Digital Room Temperature Sen-
sor for applications requiring both a room
CO
2
sensor and room temperature sensor.
The OE256-02 CO
2
Sensor uses non-
dispersive infrared (NDIR) technology and
has a measurement range of 0-2000 ppm.
Mounting
The OE256-02 CO
2
Sensor is housed in an
aspiration box. The sensor has an integral
mounting sub-base mounting plate with
modular phone jacks for connecting it to
the VCM-X and another Digital or Modular
Room Temperature Sensor. A conduit
clamp is provided to help seal the opening where the sensor cabling penetrates the aspiration box housing. The sensor and
aspiration box assembly is mounted to the ductwork by first cutting a 1
1
/
4
” diameter hole in the duct wall for insertion of the as-
piration tube. The aspiration tube is then inserted into the hole. The aspiration box sensor assembly is then secured to the
ductwork by inserting (4) supplied sheet metal screws through (4) mounting holes in the aspiration box base and securing the
assembly by screwing it to the ductwork using a manual or powered screw driver to tighten the screws.
Technical Data OE256-02 Duct Mounted CO
2
Sensor
Input Power 12-34 VDC Power Consumption 30 mW Maximum Average
1.25 W Peak Power
Operating Temperature 14
° to 122° F Operating Humidity 5-95% RH Non-Condensing
Sample Method Flow-Through
50-100 ml/min
Measurement Range 0 to 2000 ppm
Sensitivity <
±20 ppm Resolution ±1 ppm
Accuracy
±50 ppm @ 1000 ppm or 2%
measured value
Communications I 2
C
One Year Warranty WattMaster reserves the right to change specifications without notice
OE256-02 Duct Mounted CO
2
Sensor