Orion OE256-07 User Manual

www.orioncontrols.com

OE256-07 Duct Mounted

E-BUS CO

Technical Guide

Sensor

2

Table of Contents

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

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

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

DUCT MOUNTED CO2 SENSOR INSTALLATION ............................................................................................... 4

DUCT MOUNTED E-BUS CO2 SENSOR MOUNTING & WIRING TO VCB-X CONTROLLER ................................ 6

TROUBLESHOOTING ........................................................................................................................................ 7

Using LEDs to Troubleshoot ........................................................................................................................................................7

Altitude Correction ........................................................................................................................................................................7

TB1 Terminal Block (CO2 Reading) ..............................................................................................................................................7

PART NUMBER CROSS REFERENCE TABLE

PART DESCRIPTION

PART NUMBER

Duct Mounted E-BUS CO2 Sensor with Remote Pickup Tube OE256-07
Wall Mounted E-BUS CO2 Sensor OE256-05
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
EBC E-BUS Cables - varying lengths EBC-XXXF
VCB-X Controller OE335-23-VCBX

www.orioncontrols.com

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

Form: OR-DM-EBUS-CO2-TGD-01A
Copyright May 2012 WattMaster Controls, Inc.
AAON® is a registered trademark of AAON, Inc., Tulsa, OK.
WattMaster Controls, Inc. assumes no responsibility for errors or omissions.
This document is subject to change without notice.

Duct Mounted E-BUS CO2 Sensor Technical Guide

Sensor Overview

Overview

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

Tube

is used for monitoring duct CO2 levels and is designed for per­manent mounting in the Return Air duct. It utilizes an aspiration box
to accurately capture CO2 levels in the duct. It connects to the VCB-X
Controller (OE335-23-VCBX) by using an E-BUS cable with E-BUS
connectors. See Figure 1 for dimensions.

The W all Mounted E-BUS CO2 Sensor (OE256-05) is used for monitor­ing space CO2 levels and is designed for permanent wall mounting in
the conditioned space. It connects to the VCB-X Controller 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.
For more information, refer to the OE256-05 W all Mounted CO2 Sensor
Technical Guide.

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

Environmental Requirements

The Duct Mounted 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).

4.12"

3.31"

2.55”

BRASS
BARB
FITTINGS
FOR

0.170 I.D.
TUBING

5.00"

13.00"
APPROX.

4.06"

2.81”

HINGED
COVER

SENSOR
HOUSING

E-BUS CONNECTOR
FEMALE END

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
 HB LED under front cover shows active CO

sensing

2

™

4321

3M

CO2 SENSOR, HOUSING AND CABLE ASSEMBLY

CO2 PICKUP TUBE (PROVIDED WITH SENSOR)

3M

4321

E-BUS CONNECTOR EXTENSION CABLE WITH MALE ENDS (PROVIDED WITH SENSOR)

EBC-10F

0.170 I.D. TUBING (PROVIDED WITH SENSOR)FIRE RATED

8.25"

"WATTMASTER EBUS" "WATTMASTER EBUS"

120.00” APPROX.

120.00” APPROX.

EBC-10F

BRASS
BARB
FITTINGS
FOR

0.170 I.D.
TUBING

0.55”

3M

4321

Figure 1: Duct Mounted E-BUS CO2 Sensor with
Remote Pickup Tube Dimensions

Technical Guide

3