AAON Orion ASM01824, Техническое руководство, Страница: 3 / 12

Technical Guide
CO
2
SENSOR
3
Overview
The I
2
C Wall-Mounted Space CO
2
Sensor (ASM01824) is used for moni-
toring room CO
2
levels and is designed for permanent wall mounting in
the conditioned space . It connects to the VCM-X E-BUS Controller using
TSDRSC modular prefabricated cable with RJ-45 connectors. It can be
daisy-chained with the I
2 C Digital Room Sensor or wired separately
from the Orion Standard Room Temperature Sensor for applications
requiring both a room CO
2
sensor and room temperature sensor. See
Figure 1 for dimensions.
The I 2 C Duct-Mounted CO
2
Sensor (A SM01826) is comprised of the
ASM01824 CO
2
Sensor and the AAON Aspiration Box Assembly. It
is used for sensing the current CO
2
level in the HVAC unit’s return air
stream. It is designed to be mounted in the return air of the HVAC unit
and uses its integral aspiration box to sample the CO
2
level in the duct.
Some typical applications are:

Controlling ventilation in a building where the occupancy
varies frequently

Controlling ventilation to ensure excess outdoor air is not
causing energy waste

Ensuring good air distribution throughout building zones

Demand Control Ventilation
Sensor Overview
Features
The CO
2
Sensor provides the following:

Uses the patented dual beam Non-Dispersive Infrared ™
(NDIR) technology

A very accurate and stable sensor guaranteed to maintain
its accuracy due to infrared self-calibration feature of sensor

Sensor accuracy of +/- 50 ppm @ 1000 ppm or 2% of the
measured value

Annual drift of +/- 2 ppm per year

Measurement range of 0 to 2000 ppm

LED under front cover shows active CO
2
sensing

Addressable based on function within the system
Figure 1: Wall-Mounted CO
2
Sensor Dimensions
Environmental Requirements
The CO
2
Sensor needs to be installed in an environment that can main-
tain a temperature range between 14°F and 122°F and a humidity range
between 5% and 95% RH (non-condensing).