Critical Environment Technologies CGAS-D Detector User manual
Rev. D | 2023.07
www.critical-environment.com
CGAS-D Detector
Digital Transmitter
Installation Manual
2© 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
NEED MORE INFORMATION?
This is the Installation Manual for the cGas Detector Digital Transmitter. If you
would like to make sure you have the most current version or want to save it in
pdf form, click here to open or download it from our website.
If you need more information, refer to the cGas Detector Operation Manual,
which covers topics such as:
• Relay Operation
• Alarm Status, Fault Detection and Communication Failure
• Setting Channel Alarm Setpoints, Direction and Hysteresis
• Enable/Disable Internal Buzzer
• Enable/Disable Alarm Blink
• Enable/Disable Channels
• Delete Channels
• Replacing Plug & Play Smart Sensors
• Calibration
• Accessories
• Maintenance
• Troubleshooting
If you would like to view or download the cGas Detector Operation Manual
from our website click here
The most up-to-date version of the manual will always be on our website.
© 2023 All rights reserved. Data subject to change without notice. 3
Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
TABLE OF CONTENTS
1 POLICIES .......................................................................................................5
1.1 Important Note....................................................................................... 5
1.2 Warranty Policy ...................................................................................... 6
1.3 Service Policy ......................................................................................... 6
1.4 Copyrights .............................................................................................. 7
1.5 Disclaimer............................................................................................... 7
1.6 Revisions ................................................................................................ 8
2 INTRODUCTION .............................................................................................9
2.1 General Description................................................................................ 9
2.2 Key Features........................................................................................... 9
3 INSTRUMENT SPECIFICATIONS..................................................................11
3.1 Technical Specications...................................................................... 11
3.2 Enclosure Dimensions......................................................................... 15
4 SENSOR SPECIFICATIONS ..........................................................................16
4.1 Single Channel Gas Sensor Options ................................................... 16
4.2 Dual Channel Gas Sensor Options...................................................... 20
4.3 ESH-A-Remote Sensor Options........................................................... 21
4.4 Calibration Extending Firmware (CEF) and Sensor Aging................. 22
5 INSTRUMENT FEATURES ............................................................................23
5.1 Exterior Enclosure................................................................................ 23
5.2 Interior System Layout......................................................................... 24
6 INSTALLATION ............................................................................................25
6.1 Special Considerations for Different Types of Sensors..................... 25
6.2 General Safety and Maintenance Warnings ....................................... 26
6.3 Protection Against Electrical Risks..................................................... 27
4© 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
6.4 Protection Against Mechanical Risks................................................. 27
6.5 Mounting the Transmitter.................................................................... 28
6.5.1 Wet Environment Considerations ................................................ 28
6.5.2 EMI and RF Interference Considerations ................................... 29
6.5.3 Mounting Heights (sensor and application dependent).......... 29
6.6 Enclosure Mounting Components ...................................................... 32
6.6.1 Enclosure Base................................................................................ 32
6.6.2 Enclosure Bottom ........................................................................... 33
6.7 Wiring Connections.............................................................................. 33
6.7.1 Digital Wire Gauge vs Run Length ............................................... 36
6.7.2 Wiring the Relay............................................................................... 38
6.7.3 ESH-A Remote Sensor Wiring Connection................................. 39
6.8 Power Draw Requirements.................................................................. 41
7 BASIC SYSTEM OPERATION .......................................................................42
7.1 Power-up and Warm-up Process from Factory.................................. 42
7.2 Navigating the Menu Structure ........................................................... 43
7.3 Accessing the Menu with Passcodes................................................. 44
7.4 Display Settings.................................................................................... 45
7.4.1 Adjust Display Brightness ............................................................. 45
................................................................... 45
7.5 Alarm Status, Fault Detection and Communication Failure Alerts ... 46
7.6 Change Units (oC or oF) of Temperature Readings............................. 47
7.7 Temperature and/or Relative Humidity Offset ................................... 48
7.8 Test Functions...................................................................................... 49
7.8.1 Test Readings / Digital Output ..................................................... 49
7.8.2 Test Relay and Buzzer (if installed) ............................................. 50
8 TROUBLE SHOOTING...................................................................................51
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Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
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.
technician and according to instructions indicated in this manual. This
trained technician.
This instrument has not been designed to be intrinsically safe. For your safety,
do not
INSTRUMENT SERIAL NUMBER:
______________________________________________________
PURCHASE DATE:
______________________________________________________
PURCHASED FROM:
______________________________________________________
6© 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
1.2 Warranty Policy
Critical Environment Technologies Canada Inc. warrants the products we
to be free from defects in materials and workmanship for a period of two years
from the date of purchase from our facility. Sensors are consumable items and
once they leave our factory, we cannot reuse or resell them. As such, all sensor
warranty that would apply from the date of purchase from our facility.
The warranty status may be affected if the instrument has not been used and
maintained as per the instructions in the manual or has been abused, damaged,
interfaced equipment or consequential damage.
returned goods, regardless of reason, must be accompanied with an RMA
number. Please read our Warranty and Returns Policy and follow our RMA
Instructions and Form.
Due to ongoing research, development, and product testing, the manufacturer
contained herein is based on data considered accurate. However, no warranty is
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
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Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
may contact the distributor from whom it was purchased or you may contact
CETCI directly.
returned goods, regardless of reason, must be accompanied with an RMA
number. Please read our Warranty and Returns Policy and follow our RMA
Instructions and Form.
If the product is deemed repairable, for liability reasons, CETCI will perform all
necessary repairs to restore the instrument to its full operating condition.
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
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
8© 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
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
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
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
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
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.
The most up-to-date version of the manual will always be on our website.
© 2023 All rights reserved. Data subject to change without notice. 9
Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
2 INTRODUCTION
2.1 General Description
Thank you for purchasing our cGas Detector Transmitter. The cGas Detector
as enclosed parking facilities, commercial HVAC, greenhouses, recreational
facilities, refrigeration plants, manufacturing plants and other light industrial
applications.
The CGAS-D transmitter is available with internal or remote sensor(s) and
operates by diffusion. The sensors utilized in this device are accurate enough
gases.
2.2 Key Features
• 1 or 2 gas channel operation
•
communication with a Controller or Building Automation System (BAS)
• Easy Plug & Play Smart sensor replacement at end of life
• Pre-calibrated replacement sensors
•
application requirements
• 24 volt DC or (ground referenced) AC power
• 4-conductor shielded network wiring (daisy-chain)
•
• LCD display
10 © 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
• Optional low temperature package for improved usability in cold
environments*
• Optional Relative Humidity and Temperature sensor
• One SPDT dry contact relay with internal buzzer**
• Optional SPDT dry contact relay, rated 30 volts, 2 amps***
• Optional splash guard, factory installed, IP54 rated enclosure
• Optional 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
*Option -LT
• A low temperature package with OLED display and internal heater for cold
environment applications down to -40°C / -40°F
•
**Option -RBZ
•
90 dB @ 10 cm / 4 in
• Comes standard in CGAS models with a 7 series electrochemical sensor,
IR refrigerant sensor or CO2 sensor
• Available as an option for CGAS models with a 4 series electrochemical
sensor, combustible (catalytic) sensor, solid state refrigerant sensor or
PID sensor
***Option -RLY
•
• Available as an option with single channel models with a 4 series
electrochemical sensor, combustible (catalytic) sensor, solid state
refrigerant sensor or PID sensor
© 2023 All rights reserved. Data subject to change without notice. 11
Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
NOTES:
All 4 series sticky gas sensor models cannot have a relay and buzzer.
If after reading through the manual, you have any questions, please do not
3 INSTRUMENT SPECIFICATIONS
3.1 Technical Specications
MECHANICAL
Enclosure
ABS / Polycarbonate, IP54 rating with splash guard
installed. Copper coated interior to reduce RF
interference.
Weight 400 g / 14 oz
Size
Conduit Entry Points 12.7 mm / 1/2 in diameter
Mounting Holes
4.47 mm / 0.175 in diameter
USER INTERFACE
Display (standard)
to suppress reading display and/or alter brightness
Display (Option -LT) Optional OLED display for improved usability in low
temperature applications, 2-line by 16-character
12 © 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
USB Port Internal port for USB memory stick connection for in
Push Buttons Initiate calibration and menu options with internal UP,
DOWN and ENTER push buttons
Audible Alarm
Rated 90dB @ 10 cm / 4in, user enable/disable
Comes standard with all 7 series electrochemical, IR
Can be added as Option -RBZ to other models.
ELECTRICAL
Power Requirement
16 - 30 VDC, 3 W*, Class 2
12 - 27 VAC, 50-60 Hz, 3 VA, Class 2
24V recommended. Refer to Section 6.7 Wiring
Connections
*dependent on sensor type. Refer to Section 6.8 Power Draw Requirements
Digital Wiring
VDC or VAC (ground referenced) four-conductor
shielded 16 AWG stranded within conduit, network
wiring (daisy-chain)
Fuses Automatic resetting thermal
INPUT/OUTPUT
Communication
Modbus® RTU
(version 1.1b3)
RS-485
Data bits: 8
Start bits: 1
Stop bits: 1
Parity: none, odd or even
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Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
Communication
BACnet® MS/TP
(version 1 rev 14)
RS-485
BACnet® MS/TP; ANSI/ASHRAE standard 135
BACnet®
Communication protocol: 135-2012
Stop bits: 1
Data bits: 8
*100 is the default for transmitters only
*101 increasing sequentially is the default for a
system controller and transmitters
Relay & Buzzer
(Standard and
Option -RBZ)
with internal buzzer rated 90 dB @ 10
cm / 4 in, enable/disable
Relay (Option -RLY)
RH and Temperature
(Option -RHT)
User selectable units (oC or oF), user selectable
display or hide readings
ENVIRONMENTAL
Operating
Temperature
0°C to 40°C / 32°F to 104°F (standard)
-40°C to 40°C / -40°F to 104°F (with Option -LT)
Operating Humidity 15 - 90% RH non-condensing
Pollution Degree Degree 2
Altitude below 2,000 m
14 © 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
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.
© 2023 All rights reserved. Data subject to change without notice. 15
Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
3.2 Enclosure Dimensions
Above dimensions are shown with optional standard splash guard. Without
splash guard, thickness is 71 mm / 3.0 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.
NOTE: During calibration, the sensor response time will be slower with a splash
guard installed.
NOTE: The standard splash guard (Option -S) is optional for protecting non
sticky gas sensors in wash down applications. For sticky gas sensors such
as Chlorine (Cl22), Hydrogen Chloride (HCL), Hydrogen
Cyanide (HCN), Hydrogen Fluoride (HF), Ozone (O3) and Phosphine (PH3) order
the sticky gas splash guard Option -SN or use the metal splash guard
p/n: SCS-8000-WSG.
16 © 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
4 SENSOR SPECIFICATIONS
4.1 Single Channel Gas Sensor Options
Internal 4 Series
Electrochemical
Sensors
Part Number Range Lifespan
CGAS-D-CO10 - 200 ppm ~3+ yrs
2H4O) CGAS-D-EETO 0 - 20 ppm ~2 yrs
Formaldehyde (CH2O) CGAS-D-CH2O 0 - 5 ppm ~2 yrs
Hydrogen (H2) CGAS-D-EH2 0 - 2,000 ppm ~2 yrs
Hydrogen Sulphide (H2S) CGAS-D-H2S 0 - 50 ppm ~2 yrs
CGAS-D-NO 0 - 100 ppm ~2 yrs
2) CGAS-D-NO2 0 - 10 ppm ~3+ yrs
2) CGAS-D-O2 0 - 25% Vol ~3 yrs
2) CGAS-D-SO2 0 - 20 ppm ~2 yrs
Internal 7 Series
Electrochemical
Sensors
Part Number Range Lifespan
Ammonia (NH3) CGAS-D-7NH3 0 - 500 ppm ~2 yrs
CGAS-D-7CO 0 - 200 ppm ~6 yrs
Chlorine (Cl2)CGAS-D-7CL2 0 - 5.0 ppm ~3 yrs
CGAS-D-7CL2-10 0 - 10 ppm ~3 yrs
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Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
2) CGAS-D-7CLO2 0 - 1 ppm ~2 yrs
Ethylene (C2H4) * CGAS-D-7C2H4 0 - 200 ppm ~2 yrs
Fluorine (F2) CGAS-D-7F2 0 - 1 ppm ~2 yrs
Hydrogen Chloride (HCl) CGAS-D-7HCL 0 - 30 ppm ~2 yrs
Hydrogen Cyanide
(HCN) CGAS-D-7HCN 0 - 30 ppm ~2 yrs
Hydrogen Fluoride (HF) CGAS-D-7HF 0 - 10 ppm ~2 yrs
Hydrogen Sulphide (H2S) CGAS-D-7H2S 0 - 50 ppm ~2 yrs
2) CGAS-D-7NO2 0 - 10 ppm ~6+ yrs
Ozone (O3) CGAS-D-7O3 0 - 1 ppm ~2 yrs
Internal Infrared
Sensors Part Number Range Lifespan
2)
CGAS-D-CO2-2K 0 - 2,000 ppm
~ 8 yrs
CGAS-D-CO2-5K 0 - 5,000 ppm
CGAS-D-CO2-10K 0 - 10,000 ppm
CGAS-D-CO2-5% 0 - 5% vol
CGAS-D-CO2-20% 0 - 20% vol
CGAS-D-CO2-100% 0 - 100% vol
18 © 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
Refrigerants:
R134A, R143A, R22,
R32, R227ea, R402A,
R404A, R407A, R407C,
R407F, R410A, R417A,
R422A, R422D, R427A,
R434A, R438A, R442A,
R448A, R449A, R450A,
R452A, R453A, R454A,
R454B, R455A, R507A,
R513A, R514A, R1234YF,
R1234ZE, R1233ZD
CGAS-D-IR134A
CGAS-D-IR143A
CGAS-D-IR22
CGAS-D-IR32
etc.
0 - 2,000 ppm ~8 yrs
Refrigerant R123 CGAS-D-IR123 0 - 1,000 ppm ~8 yrs
Refrigerant RSF6 CGAS-D-IRSF6 0 - 1,000 ppm ~8 yrs
Internal Solid State
Sensors Part Numbers Range Lifespan
Refrigerants:
R134A, R22, R32, R402A,
R404A, R407C, R407F,
R410A, R422A, R422D,
R427A, R438A, R448A,
R449A, R450A, R452A,
R507A, R513A, R514A
CGAS-D-SR134A
CGAS-D-SR22
CGAS-D-SR32
etc.
0 - 2,000 ppm ~5 yrs
TVOC (Isobutylene) CGAS-D-STVOC 0 - 500 ppm ~5 yrs
© 2023 All rights reserved. Data subject to change without notice. 19
Rev. D | 2023.07 cGas Detector Digital Transmitter - Installation Manual
Internal Catalytic
(Combustible) Sensors Part Number Range Lifespan
Butane (C4H10)CGAS-D-
CC4H10-100 0 - 100% LEL ~5 yrs
Ethanol or Dimethyl
Ether (C2H
6O)
CGAS-D-
CC2H6O-100 0 - 100% LEL ~5 yrs
Ethane (C2H6)CGAS-D-
CC2H6-100 0 - 100% LEL ~5 yrs
Hydrogen (H2) CGAS-D-CH2-100 0 - 100% LEL ~5 yrs
Methane (CH4) CGAS-D-CCH4-100 0 - 100% LEL ~5 yrs
Methanol (CHO) CGAS-D-
CCH4O-100 0 - 100% LEL ~5 yrs
Propane (C3H8)CGAS-D-
CC3H8-100 0 - 100% LEL ~5 yrs
Internal PID Sensors Part Number Range
TVOC CGAS-D-SPL 0 - 30 ppm usage /
application
dependent
TVOC CGAS-D-SPH 0 - 300 ppm
Internal RH & Temp
Sensor Part Number
Relative Humidity and
Temperature CGAS-D-RHT
20 © 2023 All rights reserved. Data subject to change without notice.
cGas Detector Digital Transmitter - Installation Manual Rev. D | 2023.07
No Internal Sensor Part Number
Add a remote ESH-A
sensor CGAS-D-R
Add a remote analog
transmitter CGAS-D-RT
4.2 Dual Channel Gas Sensor Options
Two Internal
Electrochemical
Sensors (4 Series)
Part Number Range Lifespan
and
2)
CGAS-D-CO-NO2 10 - 200 ppm
0 - 10 ppm
~6 yrs
~3+ yrs
and
Ethylene (C2H4)
CGAS-D-CO-C2H4 10 - 200 ppm ~6 yrs
~2 yrs
and
Hydrogen Sulphide (H2S)
CGAS-D-CO-H2S 1
0 - 200 ppm
0 - 50 ppm
~6 yrs
~2 yrs
and
2)
CGAS-D-CO-O2 1
0 - 200 ppm
0 - 25% vol
~6 yrs
~3 yrs
CGAS-D-CO-NO 10 - 200 ppm
0 - 100 ppm
~6 yrs
~3 yrs
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