Critical Environment Technologies cGas Detector Installation Manual

Installation Manual

Rev. A | 2020.03

cGas Detector

Digital Transmitter www.critical-environment.com

cGas Detector Digital Transmitter - Installation Manual Rev. A | 2020.03

NEED MORE INFORMATION?

This is the Installation Manual for the cGas Detector Digital Transmitter. If you would like it in pdf form, please scan the QR code on the back cover page of this booklet or download it from our website: https://www.critical-environment.com/media/download/manuals/CGAS-D-

Installation-Manual.pdf

There is also an Operation Manual, which includes more information:

• Adjusting Display Settings

• Alarm Status, Fault Detection and Communication Failure

Notifi cations

• Setting Channel Alarm Setpoints, Direction and Hysteresis

• Relay Operations

• Enable/Disable Channels

• How to Install a Replacement Smart Sensor

• Calibration

• Accessories

• Maintenance

• Troubleshooting

You can scan the QR code below or download the Operation Manual from our website: https://www.critical-environment.com/media/download/manuals/CGAS-D-

Operation-Manual.pdf

2 © 2020 All rights reserved. Data subject to change without notice.

Rev. A | 2020.03 cGas Detector Digital Transmitter - Installation Manual

TABLE OF CONTENTS

1 POLICIES .......................................................................................................6

1.1 Important Note ....................................................................................... 6

1.2 Warranty Policy ...................................................................................... 7

1.3 Service Policy ......................................................................................... 8

1.4 Copyrights .............................................................................................. 9

1.5 Disclaimer ............................................................................................... 9

1.6 Revisions ................................................................................................ 9

2 INTRODUCTION ...........................................................................................10

2.1 General Description.............................................................................. 10

2.2 Key Features ......................................................................................... 11

3 INSTRUMENT SPECIFICATIONS ..................................................................12

3.1 Technical Specifi cations ...................................................................... 12

3.2 Enclosure Dimensions ......................................................................... 16

4 SENSOR SPECIFICATIONS ..........................................................................17

4.1 Single Channel Gas Sensor Options ................................................... 17

4.2 Dual Channel Gas Sensor Options ...................................................... 19

4.3 Calibration Extending Firmware (CEF) and Sensor Aging ................. 20

5 INSTRUMENT FEATURES ............................................................................21

5.1 Exterior Enclosure ................................................................................ 21

5.2 Interior System Layout ......................................................................... 22

6 INSTALLATION ............................................................................................23

6.1 Special Considerations for Different Types of Sensors ..................... 23

6.2 General Safety Warnings ..................................................................... 24

6.3 Protection Against Electrical Risks ..................................................... 24

6.4 Protection Against Mechanical Risks ................................................. 25

© 2020 All rights reserved. Data subject to change without notice. 3


6.5 Mounting the Transmitter .................................................................... 26

6.5.1 Wet Environment Considerations ................................................ 26

6.5.2 EMI and RF Interference Considerations ................................... 27

6.5.3 Mounting Height (Sensor Dependent) ........................................ 27

6.6 Enclosure Mounting Components ...................................................... 28

6.6.1 Enclosure Base ................................................................................ 28

6.6.2 Enclosure Bottom ........................................................................... 29

6.7 Wiring Connections .............................................................................. 29

6.7.1 Digital Wire Gauge vs Run Length ............................................... 32

6.7.2 Wiring the Relay Smart Baord (models with Option -RLY) ...... 33

7 BASIC SYSTEM OPERATION .......................................................................33

7.1 Power-up and Warm-up Process from Factory .................................. 33

7.2 Navigating the Menu Structure ........................................................... 34

7.3 Accessing the Menu with Passcodes ................................................. 35

7.4 Change Units ( o C or o F) of Temperature Readings ............................. 37

7.5 Temperature and/or Relative Humidity Offset ................................... 37

7.6 Test Functions ...................................................................................... 39

7.6.1 Test Readings / Digital Output ..................................................... 39

7.6.2 Test Relay (models with Option -RLY) ......................................... 40

8 MODBUS & BACNET CONFIGURATION ........................................................41

8.1 Changing Digital Communication Type in the Field ........................... 41

8.2 Confi guring Modbus® Settings........................................................... 42

8.2.1 Change Modbus® MAC Address................................................. 43

8.2.2 Change Modbus® Baud Rate ....................................................... 43

8.2.3 Modbus® Holding Registers ........................................................ 44



8.3 Confi guring BACnet® Settings ............................................................ 44

8.3.1 Change BACnet® MAC Address .................................................. 44

8.3.2 Change BACnet® Instance ID ...................................................... 45

8.3.3 Change BACnet® Baud Rate ........................................................ 46

8.3.4 BACnet® PICS Information ........................................................... 47

9 TROUBLE SHOOTING ...................................................................................48



1 POLICIES

1.1 Important Note

Read and understand this manual prior to using this instrument. Carefully read the warranty policy, service policy, notices, disclaimers and revisions on the following pages.

This product must be installed by a qualifi ed electrician or factory trained technician and according to instructions indicated in this manual. This instrument should be inspected and calibrated regularly by a qualifi ed and trained technician.

This instrument has not been designed to be intrinsically safe. For your safety, do not use it in classifi ed hazardous areas (explosion-rated environments).

INSTRUMENT SERIAL NUMBER:

______________________________________________________

PURCHASE DATE:

______________________________________________________

PURCHASED FROM:

______________________________________________________



1.2 Warranty Policy

Critical Environment Technologies Canada Inc. (the manufacturer) warrants this gas monitoring instrument, (excluding sensors, battery packs, batteries, pumps and fi lters), to be free from defects in materials and workmanship for a period of two years from the date of purchase from our facility. The sensors have a warranty period of one year on a pro-rated basis from the date of purchase from our facility. This warranty is limited to the mechanics of the physical sensor components and as such, should the sensor become defective within this warranty period, we will repair or replace it at our discretion. This warranty does not extend to sensors that have been poisoned by external compounds such as, but not limited to, extreme gas concentrations, paint fumes, excessive dust, debris, etc. or to sensors that have been improperly zeroed, calibrated or altered in any way. If it is determined within 90 days of purchase that a sensor is malfunctioning or unable to remain calibrated due to no fault of its placement or treatment, the instrument may be sent back to the factory for a free calibration service.

The warranty status may be affected if the instrument has not been operated, calibrated or maintained as per the instructions in the instrument’s Operation

Manual or if the instrument has been abused, damaged or altered in any way.

This instrument is only to be used for purposes stated herein. The manufacturer is not liable for auxiliary interfaced equipment or consequential damage.

Due to ongoing research, development and product testing, the manufacturer reserves the right to change specifi cations without notice. The information contained herein is based on data considered accurate. However, no warranty is expressed or implied regarding the accuracy of this data.

All returned goods (whether under warranty or not) must be pre-authorized by obtaining a return merchandise authorization (RMA) number and shipped back to the manufacturer by prepaid freight. Contact the manufacturer for an

RMA number and the procedures required for product transport.



1.3 Service Policy

CETCI maintains an instrument service facility at the factory. Some CETCI distributors / agents may also have repair facilities; however, CETCI assumes no liability for service performed by anyone other than CETCI personnel.

Repairs are warranted for 90 days after date of shipment (sensors have individual warranties). Should your instrument require non-warranty repair, you may contact the distributor from whom it was purchased or you may contact

CETCI directly.

Prior to shipping equipment to CE TCI, contact our offi returned goods must be accompanied with an RMA number.

If CETCI is to do the repair work, you may send the instrument, prepaid, to:

Attention: Service Department

Critical Environment Technologies Canada Inc.

Unit 145, 7391 Vantage Way

Delta, BC, V4G 1M3

Always include your Returned Merchandise Authorization (RMA) number, address, telephone number, contact name, shipping / billing information, and a description of the defect as you perceive it. You will be contacted with a cost estimate for expected repairs, prior to the performance of any service work.

For liability reasons, CETCI has a policy of performing all needed repairs to restore the instrument to full operating condition.

Pack the equipment well (in its original packing if possible), as we cannot be held responsible for any damage incurred during shipping to our facility.



1.4 Copyrights

This manual is subject to copyright protection; all rights are reserved. Under international and domestic copyright laws, this manual may not be copied or translated, in whole or in part, in any manner or format, without the written permission of CETCI.

Modbus® is a registered trademark of Gould Inc. Corporation.

BACnet® is a registered trademark of American Society of Heating,

Refrigeration and Air Conditioning (ASHRAE).

1.5 Disclaimer

Under no circumstances will CETCI be liable for any claims, losses or damages resulting from or arising out of the repair or modifi cation of this equipment by a party other than CETCI service technicians, or by operation or use of the equipment other than in accordance with the printed instructions contained within this manual or if the equipment has been improperly maintained or subjected to neglect or accident. Any of the forgoing will void the warranty.

Under most local electrical codes, low voltage wires cannot be run within the same conduit as line voltage wires. It is CETCI policy that all wiring of our products meet this requirement.

It is CETCI policy that all wiring be within properly grounded (earth or safety) conduit.

1.6 Revisions

This manual was written and published by CETCI. The manufacturer makes no warranty or representation, expressed or implied including any warranty of merchantability or fi tness for purpose, with respect to this manual.



All information contained in this manual is believed to be true and accurate at the time of printing. However, as part of its continuing efforts to improve its products and their documentation, the manufacturer reserves the right to make changes at any time without notice. In addition, due to improvements made to our products, there may be information in this manual that does not exist in the version of the product the user has. Should you detect any error or omission in this manual, or should you want to inquire regarding upgrading the device’s fi rmware, please contact CETCI at the following address:

Critical Environment Technologies Canada Inc.

Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada

Toll Free: +1.877.940.8741

Telephone: +1.604.940.8741

Fax: +1.604.940.8745

Email: [email protected]

Website: www.critical-environment.com incidental or consequential damages resulting from any defect in any manual, even if advised of the possibility of such damages.

2 INTRODUCTION

2.1 General Description

Thank you for purchasing our cGas Detector Transmitter. The cGas Detector is a one or two channel gas detection transmitter that offers fl exible customization options with the purpose of meeting your specifi c application and budgetary requirements. Ideal for monitoring toxic, combustible and refrigerant gases in non-hazardous (non-explosion rated) environments such as enclosed parking facilities, commercial HVAC, greenhouses, recreational facilities, refrigeration plants, manufacturing plants and other light industrial applications.



The sensors utilized in this device are accurate enough to measure to

Occupational Health & Safety (OHS) hazardous levels for toxic gases. The transmitter operates by diffusion.

2.2 Key Features

• 1 or 2 gas channel operation

• User confi gurable Modbus® RS-485 RTU or BACnet® MS/TP communication protocols for communication with a Controller or Building

Automation System (BAS)

• Easy Plug & Play Smart sensor replacement at end of life

• Customizable sensor and option combinations to meet specifi c application requirements

• 24 volt DC or (ground referenced) AC power

• 4-conductor shielded network wiring (daisy-chain)

• In fi eld upgradable fi rmware/confi guration via USB connection

• Bright LCD display

• Option -RLY *: One SPDT dry contact relay, rated 30 volts, 2 amps max

• Option -LT*: Low temperature package for improved usability in cold environments

• Option -RHT *: Relative Humidity and Temperature sensor

• Option -S: Splash guard, factory installed, IP54 rated enclosure

• Option -SN: Splash guard for sticky gas sensors, factory installed

• Standard water / dust tight, corrosion resistant enclosure (drip proof)

• Copper coated interior to reduce RF interference

• RoHS compliant circuit boards

• Auto resetting fuse

NOTE: * Option may be restricted to certain models and/or gas confi gurations.



Option -LT is a low temperature package with OLED display and internal heater for cold environment applications down to -40°C / -40°F

• Available with all models except CGAS-D-EETO

Option -RHT is an RH & Temperature sensor ( o C or o F)

• Available with all single channel confi gurations except sticky gas sensors (Cl

2

, ClO

2

, HCI, HCN, O

3

, PH

3

)

• Available with dual channel confi gurations that have a CO sensor

• The UL2075 approved CO sensor is not available with RH and

Temperature sensor

Option -RLY is a 1 SPDT dry contact relay, rated 30 volts, 2 amps max

• Available with all single channel confi gurations except CO

2 sticky gas sensors (Cl

2

, ClO

2

, HCI, HCN, O

3

, PH

3

)

and

Options -RHT and -RLY are both available with CGAS-D-CO

If after reading through the manual, you have any questions, please do not hesitate to contact our service department for technical support.

3 INSTRUMENT SPECIFICATIONS

3.1 Technical Specifi cations

MECHANICAL

Enclosure

Weight

Size

ABS / Polycarbonate, IP54 rating with splash guard installed. Copper coated interior to reduce RF interference.

400 g / 14 oz

127 mm x 127 mm x 71 mm / 5.0 in x 5.0 in x 2.8 in



Conduit Entry Points 12.7 mm / 1/2 in diameter

Mounting Holes

4.47 mm / 0.175 in diameter maximum head diameter 8 mm / 0.32 in, #8 or 4 mm screw

USER INTERFACE

Display (standard)

Display (Option -LT)

USB Port

Push Buttons

Audible Alarm

2-line by 16 character graphic L CD, user confi gurable to suppress reading display.

Optional OLED display for improved usability in low temperature applications, 2-line by 16 character

Internal port for USB memory stick connection for fi eld confi guration/fi rmware upgrades

Initiate calibration and menu options with internal UP,

DOWN and ENTER push buttons none

ELECTRICAL

Power Requirement

Digital Wiring

Fuses

16 - 30 VDC, 3 W, Class 2

12 - 27 VAC, 50-60 Hz, 3 VA, Class 2

24V recommended.

VDC or VAC (ground referenced) four-conductor shielded 16 AWG stranded within conduit, network wiring (daisy-chain)

Automatic resetting thermal



INPUT/OUTPUT

Communication

Modbus® RTU

(version 1.1b3)

RS-485

Communication

BACnet® MS/TP

(version 1 rev 14)

RS-485

Relay (Option - RLY)

Modbus® ID: 100 (default, confi gurable)

Baud rate: 19,200 (default, confi gurable)

Data bits: 8

Start bits: 1

Stop bits: 1

Parity: none

BACnet® MS/TP; ANSI/ASHRAE standard 135

BACnet®

Communication protocol: 135-2012

Baud Rate: 76,800 (default)

Base Address: 270 (default)

MAC Address: 100 (default)

Parity: no parity

Stop bits: 1

Data bits: 8

One SPDT dry contact relay rated 30 volts, 2 amps max

(not available with CO

2

gas confi gurations)

RH and Temperature

(Option -RHT)

Available with CO

2

and CO gas confi gurations only

ENVIRONMENTAL

Operating

Temperature

Operating Humidity

0°C to 40°C / 32°F to 104°F (standard)

-40°C to 40°C / -40°F to 104°F (with Option -LT)

15 - 90% RH non-condensing


Rev. A | 2020.03

Pollution Degree

Altitude cGas Detector Digital Transmitter - Installation Manual

Degree 2 below 2,000 m

CERTIFICATION

Model: CGAS-D-XXX

S/N: CGASD1807B00010

Rating: 16-30 VDC, 3W, Class 2

12-27 VAC, 50-60 Hz, 3VA, Class 2

CERTIFIED FOR ELECTRIC SHOCK & ELECTRICAL FIRE HAZARD ONLY. LA

CERTIFICATION ACNOR COUVRE UNIQUEMENT LES RISQUES DE CHOC

ELECTRIQUE ET D’INCENDIE D’ORIGINE ELECTRIQUE.

Conforms to: CSA-C22.2 No. 205-12, UL508 (Edition 18):2018

Conforms to: EMC Directive 2014/30/EU, EN 50270:2015, Type 1, EN61010

Conforms to: FCC. This device complies with part 15 of the FCC Rules,

Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.


cGas Detector Digital Transmitter - Installation Manual

3.2 Enclosure Dimensions

Rev. A | 2020.03

Above dimensions are shown with optional splash guard. Without splash guard, thickness is 71 mm / 2.8 in. The area required for enclosure door to be open 90 degrees is 178 mm / 7.0 in or 254 mm / 10.0 in for fully open. With the optional splash guard installed, the enclosure is IP54 rated.



4 SENSOR SPECIFICATIONS

4.1 Single Channel Gas Sensor Options

Electrochemical Sensors Part Number

Ammonia (NH

3

)

Carbon Monoxide (CO)

CGAS-D-NH3

CGAS-D-CO 1

Chlorine (Cl

2

)

Chlorine Dioxide (ClO

2

)

Ethylene (C

2

H

4

)

Ethylene Oxide (C

2

H

4

O)

CGAS-D-CL2

CGAS-D-CLO2

CGAS-D-C2H4

CGAS-D-EETO

Fluorine (F

2

)

Formaldehyde (CH

2

O)

CGAS-D-F2

CGAS-D-CH2O

Hydrogen (H

2

) CGAS-D-EH2

Hydrogen Sulphide (H

2

S) CGAS-D-H2S

Hydrogen Chloride (HCl) CGAS-D-HCL

Hydrogen Cyanide (HCN) CGAS-D-HCN

Hydrogen Fluoride (HF) CGAS-D-HF

Nitric Oxide (NO)

Nitrogen Dioxide (NO

2

)

Oxygen (O

2

)

Ozone (O

3

)

CGAS-D-NO

CGAS-D-NO2

CGAS-D-O2

CGAS-D-O3

Range

0 - 500 ppm

0 - 200 ppm

0 - 5.0 ppm

0 - 1 ppm

0 - 200 ppm

0 - 20 ppm

0 - 1 ppm

0 - 5 ppm

0 - 2,000 ppm ~2 yrs

0 - 50 ppm ~2 yrs

0 - 30 ppm

0 - 30 ppm

~2 yrs

~2 yrs

0 - 10 ppm

0 - 100 ppm

0 - 10 ppm

0 - 25% Vol

~2 yrs

~2 yrs

~6 yrs

~3 yrs

Lifespan

~2 yrs

~6 yrs

~3 yrs

~2 yrs

~2 yrs

~2 yrs

~2 yrs

~2 yrs

0 - 2 ppm ~2 yrs



Phosphine (PH

3

)

Silane (SiH

4

)

Sulphur Dioxide (SO

2

)

CGAS-D-PH3

CGAS-D-SIH4

CGAS-D-SO2

0 - 5 ppm

0 - 20 ppm

0 - 20 ppm

Rev. A | 2020.03

~2 yrs

~2 yrs

~2 yrs

Refrigerant Sensors

Refrigerant R22

Refrigerant R134A

Refrigerant R402A

Refrigerant R404A

Refrigerant R407A

Refrigerant R410A

Refrigerant R422D

Refrigerant R438A

Refrigerant R507A

TVOCs

Part Numbers

CGAS-D-SR22

CGAS-D-SR134A

CGAS-D-SR402A

CGAS-D-SR404A

CGAS-D-SR407C

CGAS-D-SR410A

CGAS-D-SR422D

CGAS-D-SR438A

CGAS-D-SR507A

CGAS-D-STVOC

Range Lifespan

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm ~5 yrs

0 - 2,000 ppm

0 - 500 ppm

~5 yrs

~5 yrs

Catalytic Sensors

Hydrogen (H

2

)

Methane (CH

4

)

Propane (C

3

H

8

)

18

Part Number

CGAS-D-CH2-100

CGAS-D-CH4-100

CGAS-D-

CC3H8-100

Range

0 - 100% LEL

0 - 100% LEL

Lifespan

0 - 100% LEL ~5 yrs

~5 yrs

~5 yrs

© 2020 All rights reserved. Data subject to change without notice.

Rev. A | 2020.03

PID Sensors

TVOC

TVOC cGas Detector Digital Transmitter - Installation Manual

Part Number

CGAS-D-SPL

CGAS-D-SPH

Range

0 - 30 ppm

0 - 300 ppm usage / application dependent

Infrared Sensors

Carbon Dioxide (CO

2

)

Part Numbers

CGAS-D-CO2-5K

CGAS-D-CO2-5%

4.2 Dual Channel Gas Sensor Options

Two Internal

Electrochemical

Sensors

Carbon Monoxide

(CO) and Nitrogen

Dioxide (NO

2

)

Carbon Monoxide

(CO) and

Ethylene (C

2

H

4

)

Carbon Monoxide

(CO) and

Hydrogen Sulphide

(H

2

S)

Part Number

CGAS-D-CO-NO2 1

CGAS-D-CO-C2H4 1

CGAS-D-CO-H2S 1

Range

0 - 5,000 ppm

0 - 5% vol

Lifespan

~8 yrs

Range Lifespan

0 - 200 ppm

0 - 10 ppm

~6 yrs

0 - 200 ppm

~6 yrs

~2 yrs

0 - 200 ppm

0 - 50 ppm

~6 yrs

~2 yrs



Carbon Monoxide

(CO) and

Oxygen (O

2

)

Carbon Monoxide

(CO) and Nitric Oxide

(NO)

Hydrogen Sulphide

(H

2

S) and

Sulphur Dioxide (SO

2

)

CGAS-D-CO-O2 1

CGAS-D-CO-NO 1

CGAS-D-H2S-SO2

0 - 200 ppm

0 - 25% vol

0 - 200 ppm

0 - 100 ppm

0 - 50 ppm

0 - 20 ppm

~6 yrs

~3 yrs

~3 yrs

~2 yrs

1 Carbon Monoxide sensor UL2075 Approved

NOTE: Carbon Monoxide detectors that are ordered with Option -RHT can not use UL2075 approved CO sensor

4.3 Calibration Extending Firmware (CEF) and Sensor Aging

The cGas Detector with integral electrochemical sensor(s) have been programmed with our CEF. This fi rmware takes into consideration the aging of the electrochemical CO and NO

2

sensors so that less frequent calibrations are required in less-critical applications such as parking garages. The system tracks the age of the sensor and automatically compensates for the reduced output of the sensor as it ages.



5 INSTRUMENT FEATURES

5.1 Exterior Enclosure

Œ

•

•

•

Ž

Œ

NUMBER

Œ

•

Ž

•

•

FEATURE

Door Hinge

Display

Sensor Opening

Door Screw

Lock Slot

FUNCTION

Secures door to base and allows easy opening and closing

LCD display (standard display)

Allows gas diffusion into sensor

Secures door shut

For security padlock or tie



5.2 Interior System Layout

Rev. A | 2020.03

Œ

Œ

Œ

NUMBER FEATURE

Œ

Programming

Buttons

•

Ž

•

•

RS-485

Communication

Terminals

USB Connection

Termination

Resistor

Sockets for sensors and

Options boards

A

B

•

Ž

•

•

FUNCTION

Access menu options and program functions using buttons inside the enclosure. (Arrow up, Enter, Arrow down)

Pluggable power and signal terminal for connection to controller and next transmitter.

For fi rmware and confi guration upgrades

Network termination resistor. “IN” position includes 120 ohm resistor.

Sensor boards and Options boards plug into the main board using these sockets



6 INSTALLATION

The sensor(s) in the cGas Detector go through a burn in period at our factory prior to shipping so it is ready for operation upon arrival. When installing the cGas Detect or for the fi rst time, the sensor may require a long warm up time

(24 to 48 hours) to stabilize and provide accurate readings.

NOTE: CETCI suggests that upon power-up, all sensors * be left to warm up for 24 hours prior to considering the gas readings to be accurate. *except,

Ammonia, which should be left to warm up for 48 hours .

NOTE: All sensors are calibrated in the factory and should not require calibration at the time of a routine installation or replacement.

NOTE: Temperature affects calibration. It is important to ensure the gas is at the appropriate temperature during calibration. If the sensor is being used in an extreme temperature range, calibration should be done in that same temperature range.

6.1 Special Considerations for Different Types of Sensors

If the cGas Detector is being installed in an environment that is different than ambient room temperature, you may want to do a zero calibration. This will allow for the device to compensate for the new environment in which it is being installed.

After installing a cGas Detector with an Oxygen sensor, leave it to warm up for at least 2 hours before looking at the readings. If after a minimum of 2 hours the gas reading is not 20.9%, you should do a respan.

After a substantial warm up period, an Ethylene Oxide sensor should be zeroed on site if the ambient temperature is above 22°C (71.6°F). This particular sensor has a drift factor that can be as much as 1 ppm if the temperature rises



to 25°C (77°F). With the low set point you could experience false alarms.

Ammonia sensors should be left to warm up for 48 hours so the sensor can stabilize. During calibr ation, when fl owing span gas on an Ammonia sensor, if the reading climbs higher than the calibration point after applying gas for 3 minutes, use that reading as the calibration point. It should be around 300 ppm.

Ozone sensors are reactive to temperature changes and will drift.

Silicone, lead and chlorinated hydrocarbon vapours can poison catalytic sensors.

A bump test will help you determine if a sensor requires calibration. If the sensor still does not respond as it should after a successful calibration, it probably requires replacing.

6.2 General Safety Warnings

The cGas Detector is intended for indoor use, permanently mounted at a height that is appropriate for the type of gas being monitored. Refer to Section

6.5 Mounting the Transmitter . The cGas Detector should be protected from extreme weather conditions.

The cGas Detector requires no assembly and virtually no maintenance other than regular calibration of the internal and/or remote sensors and ensuring that excess water or dust not somehow entering the enclosure and physically damaging the circuit board or internal components. There are no serviceable elements other than the calibration instructions outlined in this manual. There are no replaceable components except the sensors.

6.3 Protection Against Electrical Risks

Disconnect all power before servicing. There may be multiple power sources.



Power supply may have a building installed circuit breaker / switch that is suitably located and easy to access when servicing is required and should be labelled as cGas Detector supply (disconnecting power to the cGas Detector).

Appropriate markings should be visible at the circuit breaker / switch that is supplying power to the cGas Detector.

This device may interfere with pacemakers. Modern pacemakers have built-in features to protect them from most types of interference produced by other electrical devices you might encounter in your daily routine. If you a have a pacemaker, follow your healthcare provider’s instructions about being around this type of equipment.

6.4 Protection Against Mechanical Risks

The door of the enclosure can be removed if absolutely necessary to facilitate installation of the base but it is not recommended on this version. Extreme care and caution must be exercised when removing the door to avoid damaging the hinges. The door should only be removed when absolutely required. Any damage occurring from door removal procedure will not be covered under warranty.

Grasp the door with one hand, being careful not to make contact with any of the internal components (circuit board), and grasp the base with your other hand. Tug on the base and pull straight apart.

DO NOT TWIST . The section of the hinges located on the base should “snap” apart from the part of the hinges located on the door.

After installation, simply locate the lid hinges over the installed base hinges and pull toward you. The hinges should easily “snap” back into place.

The enclosure has one screw securing the door to the base for electrical safety and provides an opening to allow the user to apply a padlock or tie wrap if they desire the transmitter to be locked.



Be awar e that the hinged door that could potentially pinch fi ngers and the sharp edges and/or jumper pins on the board could potentially prick or cut fi ngers if not handled carefully.

6.5 Mounting the Transmitter

The cGas Detect or should be installed on a fl at vertical surface using the four

4.4 mm / 0.175 in diameter mounting holes provided to maintain water tight status. Care should be taken to ensure that the face of the cGas Detector is not obstructed in order to maximize the sensor’s exposure to the environment being monitored.

Two ½ in / 12.7 mm conduit entry points are provided in the enclosure.

Both are located in the enclosure base. One in the rear of the base and one on the bottom edge of the base. Refer to Section 6.6 Enclosure Mounting

Components .

The clearance from the PCA to the base enclosure is 12.7 mm / ½ in. Do not use a conduit connector that has more than 12.7 mm (½ in) of thread length.

NOTE: When mounting the enclosure, allow enough room to allow the end user to open the door fully to access the internal adjustments.

6.5.1 Wet Environment Considerations

If the cGas Detector is to be installed in a potential hose-down application or any application whereby liquid could be directed towards the sensor opening, the cGas Detector should be ordered with an optional attached splash guard

(factory installed).

If used in a wet or wash down application, the conduit hub entering the cGas

Detector enclosure must be liquid tight type. Any water or physical damage to the transmitter that occurs from the installer drilling their own installation holes will not be covered under warranty.



6.5.2 EMI and RF Interference Considerations

All electronic devices are susceptible to EMI (Electromagnetic Interference) and RFI (Radio Frequency Interference). Our detectors have been designed to reduce the effects of these interferences and we meet CSA FCC and CE requirements for these type of devices. However there are still circumstances and levels of interference that may cause our equipment to respond to these interferences and cause them to react as if there has been gas detected.

There are some installation procedures that will reduce the likelihood of getting faulty readings:

1. Locate the detectors and controllers out of the way from normal foot

2. Confi rm the devices are properly grounded using conduit and shielded cabling.

3. Inform operators and technical staff working in the surrounding area to be aware of these possible conditions and that two way radios,

Bluetooth enabled devices, cell phones and other electrical equipment may interfere with the response of the gas detectors.

6.5.3 Mounting Height (Sensor Dependent)

The sensor mounting height depends on the density of the gas relative to air. Heavier than air gases should be detected 6 in / 15 cm fr om the fl oor, lighter than air gas sensors should be placed on or near the ceiling, and gases which have a density close to that of air should have sensors installed in the

“breathing zone” 4 - 6 ft / 1.2 - 1.8 m from the fl oor. The breathing zone refers to the area 4 - 6 ft / 1.2 - 1.8 m from the fl oor, where most human breathing takes place. This is a good default location for sensors, as many gases are often well dispersed in air.



GAS

APPLICATIONS /

TYPES

Carbon Monoxide (CO) Gas engine exhaust

Nitrogen Dioxide (NO

2

) Diesel engine exhaust

Ammonia (NH

3

)

Commercial ice rinks

Compressor rooms

Chlorine (Cl

2

)

Ozone (O

3

)

Commercial swimming pools

SUGGESTED MOUNTING

HEIGHT

1.2 - 1.8 m above the fl oor

4 - 6 ft above the fl oor

Near the ceiling

15 cm above the fl oor

6 in above the fl oor

For more examples, visit: https://www.critical-environment.com/support/faq/at-what-height-shouldsensors-be-mounted

6.6 Enclosure Mounting Components

6.6.1 Enclosure Base

Ž

Œ

Ž

•

28

Œ

Ž Ž

•



NUMBER

Œ

•

Ž

FEATURE

Door Hinge


Mounting Holes 4.47 mm / 0.175 in diameter maximum head diameter 8 mm / 0.32 in, #8 or 4 mm screw

6.6.2 Enclosure Bottom

Œ

•

NUMBER

Œ

•

FEATURE

Door Hinge


6.7 Wiring Connections

The cGas Detector transmitter is a low voltage powered device. Any application of operating v oltages higher than indicated in the specifi cation may result in damage. Double check wiring connections prior to powering the transmitter.

Damage from incorrect wiring connections or from too much voltage applied is not covered under warranty.



All wiring should be run in EMT (or better) conduit properly earth grounded. All communications (network) wiring must be in shielded cabling. Wire shielding must be connected together at each device and taped off so it cannot cause a short on the circuit board when the door is closed. The wiring shield should be connected to ground only at the controller, have a contiguous connection throughout the network and be left taped and fl oating at the last device in the network. The recommended 4 conductor, 16 AWG, shielded stranded wire cable types are AlphaWire 79220, Belden 5202FE 008500 or equivalent.

To ensure robust data communications, a daisy chain wiring confi guration must be used. No tee taps. No star confi gurations. This means, four wires run from one end of the digital network to the other, through the same connections along the entire run. From one digital device to the next digital device, A goes to

A; B goes to B; GND goes to GND; 24V goes to 24V. Do not mix up the individual wires or the two groups of four wires.

An end of line jumper must be installed at both ends of the digital network. To terminate, you must place a 120 ohm resistor on the IN (or sometimes labelled

EN) termination jumper position ON the TERM jumper bank on the FIRST

DIGITAL DEVICE (which might not be the Controller) and the LAST DIGITAL

DEVICE in the wire run. The termination resistor jumper on all other digital devices in the network should be in the disabled position. Every CETCI digital device has a termination resistor jumper. The factory default setting of the termination resistor on all digital devices disabled.

The wiring should be 4-conductor shielded 16 awg stranded within conduit in a network wiring (daisy-chain) confi guration. Suggested 4-conductor, 16

AWG, shielded stranded wire cable types are AlphaWire 79220, Belden 5202FE

008500 or equivalent.

Wiring Example: 4-Wire VAC

If the cGas Detector is being connected to a BAS, DDC or other control panel then either a 24 VDC power supply or 24 VAC Class 2 or better transformer needs to be used.



Wiring Example: 4-Wire VDC

If the cGas Detector is being connected to a QCC or FCS the supply voltage will either be supplied by the QCC or FCS and any additional power requirements of the system will be supplied by RPS-24VDC Remote Power Supply devices.



6.7.1 Digital Wire Gauge vs Run Length

It is important to use the appropriate gauge of wire for the required length of the run to ensur e suffi heat, and overall optimum performance along the entire wire run. Large wire sizes will have less voltage drop than smaller wires sizes of the same length.

Similarly, shorter wire lengths will have less voltage drop than longer wires for the same wire size. The longer the wire run, the more attention there should be made to preventing voltage drop. The addition of an RPS-24VDC Remote Power

Supply may be required.

CETCI highly suggests 4-conductor, 16 AWG, shielded, stranded wire cable types such as AlphaWire 79220, AlphaWire 5534, Belden 9954 or equivalent. Do not use solid core wire.

Minimum Cable Length vs Size (AWG) for Digital Communication and Power

Supply

Cable Length

Meters Feet

# of

Sensors

4 6 8 10 12 14 16

0.3 to 1552 1 to 500 AWG # 18 18 18 18 18 18 18

153 to 305

306 to 457

458 to 914

501 to 1, 000 AWG #

1,001 to 1,500 AWG #

1,501 to 3,000 AWG #

18 18 18 18 18 18 18

18 18 18 16 16 16 16

18 16 16 16 16 16 16

In large system applications, if the recommended maximum cable length needs to be exceeded, an LNK-XT Network Extender can be used to boost the waning signal strength. One LNK-XT extends the network length by an additional 610 m

(2,000 ft). It is recommended that an LNK-XT be installed approximately every

32 connected devices, or when a drop in signal strength is detected.



6.7.2 Wiring the Relay Smart Board (Option -RLY)

The cGas Detector can be ordered with Option -RLY, an SPDT dry contact relay rated 30 volts, 2 amps max. The relay components are connected to a circuit board that plugs into one of the plug & play smart sensor sockets. The system does not provide any power from the relay terminal. A dry contact relay operate like a switch to simply activate (switch on) or de-activate (switch off) equipment to be controlled, such as fan starters.

The cGas Detector is designed to be fail-safe, any equipment to be controlled by the system relays should be wired to the “NC” (Normally closed) and “COM”

(Common) terminals. With this wiring, the connection will be open under normal, low gas concentration conditions. When the gas concentration rises to the confi gured alarm point or if there is a power failure, the connection relay will close. The relay coils are normally energized in a non-alarm state for failsafe operation.

7 BASIC SYSTEM OPERATION

The cGas Detector continuously monitors target gas concentrations on one or two confi gured channels. It must be connected to a controller, control panel or

BAS / BMS / DDC system; the cGas Detector is not a standalone gas detection system.

FOR THE FULL SYSTEM OPERATION INSTRUCTIONS, INCLUDING

CALIBRATION AND SENSOR REPLACEMENT, REFER TO THE OPERATION

MANUAL.

Refer to Page 2 of this manual for more details.

7.1 Power Up and Warm-up Process From Factory

Upon application of power to a cGas Detector shipped from the factory, the LCD display will turn on and rotate through several info screens that differ depending



on the confi guration of the transmitter. The warm-up period takes between 2 and 5 minutes depending on the gas sensors type.

NOTE: The cGas Detector will be visible on the controller / BAS / DDC system during the warm-up countdown but a correct reading will not show up until the unit has fi nished the warm-up period and the sensor(s) has stabilized.

All alarms will be disabled during the system warm-up period. After the warm-up period, the system may exhibit gas alarm condition(s) if one or both of the sensors has not completely stabilized during the warm up period.

This is normal and the length of time the gas alarms exist is dependent upon the length of time since the unit was last powered up, and the state of the environment it is installed in. Refer to Section 6.1 Special Considerations for

Different Types of Sensors for more information about sensor warm up time.

Upon power-up, all sensors* should be left to warm up for 24 hours prior to considering the gas readings to be accurate.

*except, Ammonia, which should be left to warm up for 48 hours.

All sensors are calibrated in the factory prior to shipping and should not require calibration at the time of a routine installation or replacement.

7.2 Navigating the Menu Structure

The three programming push-buttons inside the enclosure are used to navigate through the cGas Detector menu structure. Refer to Section 5.1 Exterior

Enclosure for location photo.

ENTER begins a process or moves you to the next screen in the same menu.



The UP or DOWN buttons are used to enter characters/numbers and to navigate to the next menu item. For simplicity’s sake, directions in this manual use the UP button.

A line under a character or number indicates that is the space into which you are entering a character or number. Use the ENTER button to move to the next space. Or use the UP or DOWN button to change the value in that space.

The > symbol indicates that you can edit the menu line item.

After entering and confi rming a value you can either Exit the menu or press the

UP button to move to the next item in that menu. All menus are circular and will bring you back to the Exit screen. Press ENTER to Exit.

7.3 Accessing the Menu with Passcodes

You have to enter a passcode to access the menu. From the normal operation screen, press ENTER to access the password entry screen. Use the UP or

DOWN arrow to scroll to the desired number. Press ENTER to move to the next position. Continue until the full code is entered and press ENTER when fi nished.

CODE

0001

1001

NAME

Test Menu

Basic Menu

DESCRIPTION

• Test Reading (Digital Output)

• Test Relay (if Option -RLY is installed)

If confi gured as a Modbus® device

• Comm Type

• Comm Mac

• Comm Baud



1001

1014

2012

3022

3032

Rev. A | 2020.03

Basic Menu

Display Menu

Alarms Menu

Confi g Menu

Calibrate Menu

If confi gured as a BACnet® device

• Comm Type

• Comm Mac

• Comm Baud

• Instance ID

• Display Type

• Brightness

• Display Line 1

• Display Line 2

• Selected Channel

• Selected Alarm Level

• Set Alarm Setpoint

• Set Alarm Direction (Ascending/

Descending)

• Set Alarm Hysteresis


• Enable/Disable Channel

• Read from Sensor

• Write to Sensor


• Set Calibration Gas

• Calibrate Zero

• Calibrate Span

• Temperature Offset*

• Humidity Offset*

• Temperature Units*

*displayed only if -RHT option is installed



7.4 Change Units (

o

C or

o

F) of Temperature Readings

NOTE: This menu item only applies if the cGas Detector has the -RHT option installed.

You can change the factory confi gured temperature unit type from Celsius to

Fahrenheit (or vice versa) very easily.

From the main display, press ENTER.

Enter passcode 3032 using the UP button and ENTER button.

Enter Password

3032

Press ENTER to access the Calibrate Menu.

Calibrate Menu

Press Enter

In the Selected Channel menu, if Temperature is not displayed, press ENTER and use the UP button to scroll to fi nd Temperature. Press ENTER.

Selected Channel Selected Channel

CO >Temperature

Use the UP button to fi nd Temperature Unit. If you want to change the unit type, press ENTER.

Temperature Unit

Celsius

Press the UP button to choose Fahrenheit press ENTER and ENTER to exit.

Temperature Unit

>Fahrenheit

7.5 Temperature and/or Relative Humidity Offset

NOTE: This menu item only applies if the cGas Detector has the -RHT option installed.



NOTE: Depending on the confi guration, the device will show the temperature in either Celcius or Fahrenheit. The units can be changed at any time, refer to

Section 7.4 Change Units ( o C or o F) of Temperature Readings .

The temperature and relative humidity sensors come pre-calibrated from the factory. If you fi nd that the readings on the cGas Detector are higher or lower than another measurement device, you can adjust the reading by setting an offset value so the reading is more accurate. The Temperature offset value is a number of degrees and the Humidity offset value is a percentage, both in either direction of 0.



Enter Password

3032

Press ENTER to access the Calibrate Menu.

Calibrate Menu

Press Enter

In the Selected Channel menu, if Temperature (or Humidity) is not displayed, press ENTER and use the UP button to scroll to fi nd the item you are looking for.

Press ENTER.

Selected Channel

CO

Selected Channel Selected Channel

>Temperature >Humidity

Use the UP button to fi nd Temperature Adj (or Humidity Adj). If you want to change the offset value, press ENTER. Change the offset value using the UP or

DOWN and ENTER buttons.

Temperature Adj

>-4.0 degC

Humidity Adj

>+02 %RH

Press ENTER to confi rm the value is correct. If you entered the wrong value,


Rev. A | 2020.03 cGas Detector Digital Transmitter - Installation Manual press the UP button to move the cursor to N and press ENTER and reenter the value.

Confirm?

>-4.0 degC

N

>Y >+2 %RH

Confirm?

N

>Y

7.6 Test Functions

7.6.1 Test Reading / Test Digital Output

For each gas channel, you can manually enter a gas reading value of your choice (within the range of the sensor) that will be sent over the digital network to test the connection and confi gured responses between the cGas Detector and the DDC/BAS. You can do the same for relative humidity and temperature if the -RHT option is installed.



Enter Password

0001

Press ENTER to access the Test Menu.

Test Menu

Press Enter

In the Selected Channel menu, confi rm the correct channel is showing.

Selected Channel

CO

If you want to choose a different channel, press ENTER and use the UP button to scroll to the next value. Press ENTER and continue.

Selected Channel

>NO2

The list to choose from will depend on included sensors and options:

• Gas Type (ie. CO)

• Gas Type (ie. NO2)



• Temperature

• Humidity

Press the UP button to fi nd Test Reading. To make a change, press ENTER and then use the UP, DOWN and ENTER buttons to enter the value.

Test Reading

0 PPM NO2

Test Reading

>10.0 PPM NO2

Press ENTER and then again to Confi rm Y.

Confirm?

>10.0 PPM NO2

N

>Y

Test Reading

10.0 PPM NO2

The test will start as soon as you press ENTER to confi rm and will remain in the test mode as long as the Test Reading screen remains untouched. To stop the test, press the UP or DOWN button. Test another reading value or press

ENTER to Exit.

7.6.2 Test Relay (models with Option -RLY installed)

NOTE: Before testing the relay, notify the appropriate people so unnecessary distress or response is not caused by activating fans or equipment or inadvertantly calling the fi re department or other emergency response team.



Enter Password

0001

Press ENTER to access the Test Menu.

Test Menu

Press Enter

In the Test Relay menu, the default entry is Untripped. Press ENTER and use the

UP button to change to Tripped. Press ENTER. You will hear a soft click and the relay will activate accordingly, respecting its failsafe setting and ON/OFF delays.



Test Relay:SB

Untripped

Test Relay:SB

>Tripped

To stop the relay test, Press ENTER and the UP button to change to Untripped.

Press ENTER. You will hear a soft click and the relay will deactivate.

Test Relay:SB

>Untripped

When fi nished, press ENTER and then UP to Exit.

8 MODBUS & BACNET CONFIGURATION

The cGas Detector can be changed from Modbus® to BACnet® or vice versa in the fi eld.

8.1 Changing Digital Communication Type in the Field

When the communication type is changed from/to Modbus® or BACnet®, the device will reset. This will briefl y interrupt communications on the network it is connected to.



Enter Password

1001

Press ENTER to access the Basic Menu.

Basic Menu Comm Type

Press Enter MODBUS

Press ENTER. Use the UP or DOWN buttons to choose MODBUS or BACNET or

Cancel. Press ENTER. If you have changed the communication type, the device will display Reset Device.



Comm Type

>BACNET

Reset Device

Press ENTER and the cGas Detector will power off and on. This will cause a brief interruption in communications if the cGas Detector is on a network.

NOTE: If you change the Comm Type, make sure you make the necessary changes to the corresponding MAC, Baud and Instance ID as appropriate.

Refer to the following Sections 8.2 Confi guring Modbus® Settings or 8.3

Confi guring BACnet® Settings.

8.2 Confi guring Modbus® Settings

If a complete system (controller with digital transmitters and peripherals) is ordered from the factory, it will be shipped preconfi gured with the appropriate

Modbus® settings.

Factory Default Modbus® Settings

• Modbus® ID = 100 (default, confi gurable)

• Baud rate =19,200 (default, confi gurable)

• Data bits = 8

• Stop bits = 1

• Parity = none

If you adding it to an existing system the transmitters may require changes to the default Modbus® settings in order for communication to be successful between devices. Make sure your network connection is complete, the network termination switches are set appropriately and all the devices are confi gured with the same baud rate, character format, etc. Each device must have its own unique Modbus

®

ID.



8.2.1 Change Modbus® MAC Address

All devices on the same network must have a unique Modbus ID. The range of numbers that can be used as a Modbus® MAC address is 100 to 255.



Enter Password

1001


Basic Menu

Press Enter

The Comm Type displayed should be MODBUS. Press the UP button until you see Comm MAC.

Comm Type

MODBUS

Comm MAC

000

Press ENTER. Use the UP or DOWN buttons to change the numeric value. Move to the next digit by pressing ENTER. When fi nished, press ENTER to confi rm and again to Exit.

Comm MAC

>101

Confirm?

>101

N

>Y

8.2.2 Change Modbus® Baud Rate

All devices on the same network must have the same baud rate. The default

Modbus® baud rate for all CETCI Modbus® devices is 19,200.



Enter Password

1001




Basic Menu

Press Enter

The Comm Type should be Modbus. Press the UP button until you see Comm

Baud.

Comm Type Comm Baud

MODBUS 19,200

Press ENTER. Use the UP or DOWN buttons to scroll through the baud rates to choose from:

• 9,600

• 14,400

• 19,200 (default, confi gurable)

• 38,400

• 57,600

• 76,800

• 115,200

Select the preferred baud rate by pressing ENTER to save. Press the UP buttons and ENTER to Exit.

8.2.3 Modbus® Holding Registers

If you have specifi c requirements, have any questions or require clarifi cation about the Modbus® holding registers, please contact CETCI for assistance.

8.3 Confi guring BACnet® Settings

8.3.1 Change BACnet® MAC Address

The factory set default BACnet® MAC address is 100. The MAC ID along with the Instance ID make up the complete ID for the device. Each device requires a unique ID in order to communicate with the BAS / DDC. A MAC address should be set for each digital cGas Detector during installation.





Enter Password

1001


Basic Menu

Press Enter

The Comm Type should be BACnet. Press the UP button until you see Comm

MAC.

Comm Type

BACnet

Comm MAC

100

Press ENTER. Use the UP button to change the numeric value. Move to the next digit by pressing EN TER. When fi nished, press ENTER to confi rm and Exit.

Comm MAC

>111

Confirm?

>111

N

>Y

8.3.2 Change BACnet® Instance ID

Every device on a BACnet® network must have a unique Instance ID. An

Instance ID is the Vendor ID (or Base ID) followed by the device’s MAC address.

CETCI’s Vendor ID is 270. If the device’s MAC ID is 100, then the Instance ID would be 270100.



Enter Password

1001


Basic Menu

Press Enter



The Comm Type should be BACnet. Press the UP button until you see Instance

ID.

Comm Type

BACnet

Instance ID

270100

Press ENTER. Use the UP button to enter the numeric value. Move to the next digit by pressing EN TER. When fi nished, press ENTER to confi rm and Exit.

Instance ID

>0270111

Confirm?

>270111

N

>Y

8.3.3 Change BACnet® Baud Rate

All devices on the same BACnet® network must have the same baud rate. The default BACnet® baud rate is 76,800.



Enter Password

1001


Basic Menu

Press Enter

The Comm Type should be BACnet. Press the UP button until you see Comm

Baud.

Comm Type Comm Baud

BACnet >19200

Press ENTER. Using the UP or DOWN buttons, scroll through the baud rates to choose from:

• 9,600

• 14,400

• 19,200



• 38,400

• 57,600

• 76,800 (default, confi gurable)

• 115,200

Select the preferred baud rate by pressing ENTER to save. Press the UP button and ENTER to Exit.

8.3.4 BACnet® PICS Information

Critical Environment Technologies Canada Inc. (CETCI) has been granted the

BACnet® Testing Laboratories (BTL) certifi cation for the CGAS Detector Family upon passing the BTL requirements for the BACnet® Smart Actuator (B-SA) designation.

For a copy of the BACnet® Protocol Implementation Conformance Statement

(PICS) information go to BACnet® International website: https://www.bacnetinternational.net/btl/index.php?m=81 or visit our website: https://www.critical-environment.com/media/download/btlpics/CGAS-Family-

BACnet-PICS.pdf

If you have specifi c requirements, have any questions or require clarifi cation about the BACnet® PICS information, please contact CETCI for assistance.



9 TROUBLE SHOOTING

cGas Detector won’t power up. (blank display)

Is the power properly connected? Check the wiring connections. Refer to

Section 6.7 Wiring Connection . cGas Detector display shows “COMM” message.

Modbus

®

or BACnet output signal has not been connected properly. Check the wiring connections and the network settings.

Device cannot be seen by the Controller and/or the BAS / DDC on the

Modbus® network.

• Check the Baud rate. All devices in the network must have the same Baud rate.

• Check that local area network wiring is correct, especially the A and B lines to make sure they are not swapped between devices on the network.

• Check the Modbus® ID. Each device must have a unique ID assigned to it.

Device cannot be seen by the Controller and/or the BAS / DDC on the

BACnet® network.

• Check the Baud rate. All devices in the network must have the same Baud rate.

• Check to make sure the device has a unique ID assigned to it, which is made up of the MAC ID and the Base ID.

• Check that local area network wiring is correct, especially the A and B lines to make sure they are not swapped between devices on the network.

Frequent, unexpected alarm reading reported to BAS/DDC.

Check to see if EMI and RF interference is causing the equipment to react this way. Refer to Section 6.5.2 EMI and RF Interference Considerations in the cGas

Detector Digital Installation Manual for more information.


Rev. A | 2020.03

NOTES




NOTES

Rev. A | 2020.03


Rev. A | 2020.03

NOTES



CGAS-D-20200309-Rev-A

Unit 145, 7391 Vantage Way, Delta, BC V4G 1M3 Canada

Tel: +1.604.940.8741 Toll Free: +1.877.940.8741

www.critical-environment.com


Critical Environment Technologies cGas Detector Installation Manual

Installation Manual

cGas Detector

NEED MORE INFORMATION?

TABLE OF CONTENTS

1 POLICIES

1.1 Important Note

1.2 Warranty Policy

1.3 Service Policy

1.4 Copyrights

1.5 Disclaimer

1.6 Revisions

2 INTRODUCTION

2.1 General Description

2.2 Key Features

3 INSTRUMENT SPECIFICATIONS

3.1 Technical Speciﬁ cations

3.2 Enclosure Dimensions

4 SENSOR SPECIFICATIONS

4.1 Single Channel Gas Sensor Options

4.2 Dual Channel Gas Sensor Options

4.3 Calibration Extending Firmware (CEF) and Sensor Aging

5 INSTRUMENT FEATURES

5.1 Exterior Enclosure

5.2 Interior System Layout

6 INSTALLATION

6.1 Special Considerations for Different Types of Sensors

6.2 General Safety Warnings

6.3 Protection Against Electrical Risks

6.4 Protection Against Mechanical Risks

6.5 Mounting the Transmitter

6.6 Enclosure Mounting Components

6.7 Wiring Connections

7 BASIC SYSTEM OPERATION

7.1 Power Up and Warm-up Process From Factory

7.2 Navigating the Menu Structure

7.3 Accessing the Menu with Passcodes

7.4 Change Units (

C or

F) of Temperature Readings

7.5 Temperature and/or Relative Humidity Offset

7.6 Test Functions

8 MODBUS & BACNET CONFIGURATION

8.1 Changing Digital Communication Type in the Field

8.2 Conﬁ guring Modbus® Settings

®

8.3 Conﬁ guring BACnet® Settings

9 TROUBLE SHOOTING

®

NOTES

NOTES

NOTES

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Table of contents