Orion OE256-05 User Manual

www.orioncontrols.com

OE256-05 Wall Mounted

E-BUS CO

Technical Guide

Sensor

2

TABLE OF CONTENTS

SENSOR OVERVIEW ......................................................................................................................................... 3

Features .......................................................................................................................................................................................3

Environmental Requirements ....................................................................................................................................................... 3

WALL MOUNTED E-BUS CO

SENSOR WIRING TO HVAC UNIT CONTROLLER ............................................... 4

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TROUBLESHOOTING ........................................................................................................................................ 5

Setting The Sensor Address Switch .............................................................................................................................................5

Using LEDs to Troubleshoot ........................................................................................................................................................6

Altitude Correction ........................................................................................................................................................................6

TB1 Terminal Block (CO2 Reading) ..............................................................................................................................................6

APPENDIX ........................................................................................................................................................ 7

Mounting Plate Dimensions..........................................................................................................................................................7

PART NUMBER CROSS REFERENCE TABLE

PART DESCRIPTION PART NUMBER

Wall Mounted E-BUS CO

Duct Mounted E-BUS CO2 Sensor OE256-07

E-BUS LCD Digital Room Sensor Temp Only OE217-02

E-BUS LCD Digital Room Sensor Temp & RH OE217-03

E-BUS Digital Room Sensor Temp & RH OE217-04

Mounting Plate BK000081

EBC E-BUS Cables - varying lengths EBC-XXXF

VCB-X Controller OE335-26B-VCBX

VCC-X Controller OE338-26B-VCCX

Sensor OE256-05

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WattMaster Controls Inc.
8500 NW River Park Drive · Parkville , MO 64152
Toll Free Phone: [phone]
PH: [phone] · FAX: [phone] ·
E-mail: [e-mail]
Visit our web site at www.orioncontrols.com

www.orioncontrols.com

Form: OR-WM-EBUS-CO2-TGD-01B
Copyright December 2014 WattMaster Controls, Inc.

®

is a registered trademark of AAON, Inc., Tulsa, OK.

AAON
WattMaster Controls, Inc. assumes no responsibility for errors or
omissions.
This document is subject to change without notice.

WALL MOUNTED E-BUS CO

Sensor Overview

SENSOR

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Overview

The OE256-05 Wall Mounted E-BUS CO2 Sensor is used for monitoring
space CO
conditioned space. It connects to the VCB-X Controller (OE335-23-

VCBX) and VCC-X Controller (OE338-26B-VCCX) using an EBC
E-BUS Expansion Cable. It can be daisy-chained with the E-BUS
Digital Room Sensor (OE217-02, OE217-03, OE217-04) for applica­tions requiring both a space CO2 sensor and space temperature sensor.

See Figure 1 for dimensions.

The OE256-07 E-BUS Duct Mounted CO2 Sensor with Remote Pickup

utilizes an aspiration box. It is used for sensing the current CO2 level in
the HVAC unit’s return air stream. It is designed to be mounted in the
return air duct of the HVAC unit and uses its integral aspiration box to
sample the CO2 level in the duct.

This technical guide provides information for the Wall Mounted E-BUS
CO2 Sensor only, for more information regarding the Duct Mounted E­BUS CO2 Sensor, please see the OE256-07 Duct Mounted E-BUS CO2
Sensor Technical Guide.

Some typical applications are:

levels and is designed for permanent wall mounting in the

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 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

Environmental Requirements

The E-BUS CO2 Sensor needs to be installed in an environment that can
maintain a temperature range between 14°F and 122°F and a humidity
range between 5% and 95% RH (non-condensing).

2.80

4.54

0.96

0.80

Features

The CO2 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

sensing

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 Addressable based on function within the system

™

Figure 1: Wall Mounted E-BUS CO2 Sensor
Dimensions

Technical Guide

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