Critical Environment Technologies ART Operation Manual
Operation Manual
www.critical-environment.com
ART Infrared Refrigerant Transmitter
Rev. 1 | 2014.02
2 © 2014 All rights reserved. Data subject to change without notice.
ART - Operation Manual Rev. 1 | 2014.02
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 DETECTION OPTIONS ...................................................................... 10
3.1 Broadband Gas Detection................................................................................... 10
3.2 Gas Specic Detection ........................................................................................ 11
3.3 Changing Gas Types and Accuracy ...................................................................... 13
3.4 Remote Controller Options ................................................................................ 14
4 INSTRUMENT SPECIFICATIONS ...................................................... 14
4.1 Technical Specications ...................................................................................... 14
4.2 Enclosure Dimensions ........................................................................................ 17
5 FEATURES ........................................................................................... 18
5.1 Front Exterior Enclosure ..................................................................................... 18
5.2 Interior System Layout ....................................................................................... 20
5.2.1 Front of Enclosure ................................................................................. 20
5.2.2 Back of Enclosure .................................................................................. 21
6 MOUNTING ........................................................................................ 22
6.1 Warnings and Prerequisites ................................................................................ 22
6.2 Mounting Locations ........................................................................................... 23
6.2.1 General Placement Guidelines .............................................................. 23
6.2.2 Machinery Rooms ................................................................................. 23
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6.2.3 Refrigerated Spaces .............................................................................. 24
6.2.4 Chillers .................................................................................................. 24
6.3 Mounting Procedure .......................................................................................... 25
7 WIRING AND CONFIGURATION ...................................................... 28
7.1 Overview ............................................................................................................ 28
7.2 Wiring Supply Power (24 VAC or 24 VDC) ............................................................ 28
7.2.1 Maintaining Neutral Polarity ................................................................ 30
7.3 Wiring Alarm Output (Analog Signal) ................................................................. 30
7.4 Wiring Digital Alarm Output Relay ..................................................................... 31
7.5 Modbus Network Conguration ......................................................................... 32
7.6 Conclusion ......................................................................................................... 35
8 OPERATION AND STABILIZATION ..................................................36
8.1 Power Up and Warm-up ..................................................................................... 36
8.2 Stabilization ....................................................................................................... 36
8.3 Perform a Manual Zero ....................................................................................... 36
8.4 Behavior During Alarm Conditions ..................................................................... 37
8.5 Gas Detector Faults ............................................................................................ 37
8.5.1 Overview .............................................................................................. 37
8.5.2 Non-Critical Faults ................................................................................ 37
8.5.3 Critical Faults ........................................................................................ 38
9 SETTING AND CONFIGURING THE PARAMETERS ........................ 39
9.1 User Interface Overview ..................................................................................... 39
9.2 Setting Parameters ............................................................................................ 40
9.2.1 Overview .............................................................................................. 40
9.2.2 Conguring Parameters ........................................................................ 40
9.3 Completing Setup .............................................................................................. 48
10 FUNCTIONAL TESTS AND GAS ADJUSTMENTS ......................... 49
10.1 Warnings and Cautions .................................................................................... 49
10.2 Bump Test vs Adjusting Detector Response ...................................................... 50
10.3 Bump Testing ................................................................................................... 51
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10.4 Adjustment Using Calibration Gas .................................................................... 52
11 MODBUS COMMUNICATIONS ...................................................... 54
11.1 Introduction ..................................................................................................... 54
11.2 Communication Settings .................................................................................. 55
11.3 Analog Input Registers ..................................................................................... 55
11.4 Analog Output Registers .................................................................................. 56
11.5 Input Status Flags ............................................................................................ 57
11.6 Output Status Flags .......................................................................................... 58
12 REPLACEMENT PARTS AND ACCESSORIES ................................ 59
12.1 Splash Guard .................................................................................................... 59
12.1.1 Splash Guard Mounting Template ....................................................... 60
12.2 Metal Protective Guard .................................................................................... 61
12.3 Calibration Kit .................................................................................................. 62
13 TROUBLE SHOOTING ..................................................................... 62
13.1 Fault Codes ....................................................................................................... 62
13.2 Diagnostic Attributes (P.-18) ............................................................................ 65
13.3 Resetting to Default Values .............................................................................. 66
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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 qualied electrician or factory trained technician and
according to instructions indicated in this manual. This instrument should be inspected and
calibrated regularly by a qualied and trained technician. For more information, refer to
Section 10 Functional Tests and Gas Adjustments of this manual.
This instrument has not been designed to be intrinsically safe. For your safety, do not use it
in classied hazardous areas (explosion-rated environments).
INSTRUMENT SERIAL NUMBER:
________________________________________________
PURCHASE DATE:
________________________________________________
PURCHASED FROM:
________________________________________________
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ART - Operation Manual Rev. 1 | 2014.02
1.2 Warranty Policy
Critical Environment Technologies Canada Inc. (CETCI), also referred to as the manufacturer,
warrants this instrument, excluding sensors, to be free from defects in materials and
workmanship for a period of two (2) years from the date of purchase by the original
owner.
Most sensors have a warranty period of one (1) year from the date of purchase. If the
product should become defective within this warranty period, we will repair or replace it at
our discretion. Please check with the manufacturer for specic sensor warranty.
The warranty status may be aected if the instrument has not been used and maintained as
per the instructions in this manual or has been abused, damaged, or modied 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 specications 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 goods must be shipped to the manufacturer by prepaid freight. All returned goods must
be pre-authorized by obtaining a return merchandise authorization (RMA) number. Contact
the manufacturer for a number and 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
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Rev. 1 | 2014.02 ART - Operation Manual
whom it was purchased or you may contact CETCI directly.
Prior to shipping equipment to CETCI, contact our oce for an RMA #. All 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.
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 modication of this equipment by a party other than
CETCI service technicians, or by operation or use of the equipment other than in accordance
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ART - Operation Manual Rev. 1 | 2014.02
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 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 eorts to improve its products and their
documentation, the manufacturer reserves the right to make changes at any time without
notice. Revised copies of this manual can be obtained by contacting CETCI or visiting
www.critical-environment.com.
Should you detect any error or omission in this manual, 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: marketing@cetci.com
Website: www.critical-environment.com
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In no event will CETCI, its ocers or employees be liable for any direct, special, 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 ART Infrared Refrigerant Transmitter. The ART is a nondispersive infrared, state-of-the-art xed gas detector which can detect a wide range
of refrigerant gases. It can be used on a stand-alone basis, connected to a controller or
integrated into a Building Management System (BMS).
The ART can be used in locations that require continuous monitoring and to add gas
detection solutions to an existing system.
The ART is available in two models - Broadband and Gas Specic. The Broadband Gas
Detector is used as a general purpose, gross leak detector and is factory tested and certied.
If more accurate detection is needed, Gas Specic models are available, which are factory
certied and calibrated to the target refrigerant.
If after reading through the manual, you have any questions, please do not hesitate to
contact our service department for technical support.
2.2 Key Features
• Long-life, non-dispersive infrared sensor allows for accurate low-level leak detection
• Fast-responding, refrigerant-specic sensor with no cross interferences to non-
refrigerant gases
• Detects all refrigerants (CFC, HCFs, HCFC, HFOs) including HF01234yf, HFO1234ze,
R410a & R22)
• Modbus RTU interface to connect to BAS/BMS systems
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ART - Operation Manual Rev. 1 | 2014.02
• On-board alarm relay
• User selectable analog output: 4 - 20 mA, 0 - 5V, 1 - 5V, 0 - 10V, 2 - 10V
• LED real-time display with on-board audible and visual alarms
3 DETECTION OPTIONS
The ART gas detector is available in two models:
• Broadband Gas Detector used for gross leak detection, or
• Gas Specic Detector that is more distinct, pre-calibrated and characterized for
response to specic refrigerants
3.1 Broadband Gas Detection
The ART Broadband Gas Detector (Part Code: ART-B) is used as a general purpose gross leak
detector and is factory tested and certied. The refrigerants are combined into three groups
and is shipped with the accuracy indicated in the chart on the next page. Measurement
performance is based on an average response prole for all of the gases within the group.
For more information on Value for Parameter 11, see Section 9 Setting and Conguring the
Parameters.
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GROUP #
VALUE FOR
PARAMETER 11
REFRIGERANT AS SHIPPED ACCURACY
1 P. -11 = 1
R123 ±30 PPM ±35%
R134a ±30 PPM ±25%
R404a ±30 PPM ±35%
R407a ±30 PPM ±25%
R407c ±30 PPM ±20%
R407f ±30 PPM ±20%
R410a ±30 PPM ±20%
R427a ±30 PPM ±15%
R507 ±30 PPM ±35%
2 P.11 = 2
R422a ±30 PPM ±25%
R422d ±30 PPM ±20%
HFO1234yf ±30 PPM ±25%
HFO1234ze ±30 PPM ±25%
3 P.-11 = 3 R22 ±30 PPM ±25%
NOTE: Greater accuracy may be achieved through the use of calibration gas and the
adjustment procedure detailed in Section 10 Functional Tests and Gas Adjustments.
3.2 Gas Specic Detection
If more accurate detection is needed, the ART Gas Specic Detector is shipped factory
certied and calibrated to the target refrigerant. For more information on Parameter 11 and
refrigerant conguration instructions, see Section 9 Setting and Conguring the Parameters.
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ART - Operation Manual Rev. 1 | 2014.02
PART NUMBER REFRIGERANT ACCURACY
ART-R22 R22
±30 ppm ±5%
ART-R123 R123
±30 ppm ±5%
ART-134A R134a
±30 ppm ±5%
ART-R404A R404a
±30 ppm ±5%
ART-R407A R407a
±30 ppm ±3%
ART-R407C R407c
±30 ppm ±3%
ART-R407F R407f
±30 ppm ±3%
ART-R410A R410a
±30 ppm ±3%
ART-R422A R422a
±30 ppm ±5%
ART-R422D R422d
±30 ppm ±5%
ART-R427A
R427a ±30 ppm ±3%
ART-R507
R507 ±30 ppm ±5%
ART-HFO1234YF
HFO1234yf ±30 ppm ±5%
ART-HFO1234ZE
HFO1234ze ±30 ppm ±5%
NOTE: Gas specic detectors can be re-calibrated in the eld to new target gases. Use
optional calibration instructions in Section 10 Functional Tests and Gas Adjustments for
increased accuracy when detecting a new target gas that is dierent from the “as shipped”
target gas. Refer to Section 3.3 Changing Gas Types and Accuracy below.
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3.3 Changing Gas Types and Accuracy
As Shipped
The ART-R22 is factory calibrated to R22 and has an AS-SHIPPED R22 response
accuracy of ±30 ppm ±5% of reading.
Changed Gas Type
(Reduced Accuracy)
The gas detector may be changed to respond to any of the other listed
refrigerants (see Parameter P.-11 in Section 9.2 Setting Parameters). If
changed, the gas detector will have a lower accuracy for the target refrigerant
(without calibration). In this example, that accuracy is ±30 ppm ±16% of
reading.
Optional Calibration
(For Improved Accuracy)
By applying calibration gas containing the NEW target refrigerant, and via
the routine described in Section 10.4 Adjustment Using Calibration Gas, the
gas detector may then be adjusted to respond with the calibrated accuracy
of ±30 ppm ±5% of reading as shown in the chart in Section 3.2 Gas Specic
Detection.
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ART - Operation Manual Rev. 1 | 2014.02
3.4 Remote Controller Options
The ART can connect to any controller through the standard analog output (voltage and
current: see 4.1 Technical Specications below), the standard alarm relay, or the digital
Modbus RTU communications interface.
4 INSTRUMENT SPECIFICATIONS
4.1 Technical Specications
GAS TYPE
Refrigerants
Group 1 R123, R134a, R404a, R407a, R407c, R407f. R410a, R427a, R507
Group 2 R422a, R422d, HFO1234yf, HFO1234ze
Group 3 R22
MECHANICAL
Enclosure ABS plastic with a UL ammability rating of 94V-0
Weight 180 g (0.40 lb) (6.3 oz)
Size 4.0” x 5.9” x 1.5” (102 mm x 150 mm x 40 mm)
ELECTRICAL
Power Requirement 24 VDC, 24 VAC, 50 - 60 Hz, 2.5 W max
Wiring
24VAC or 24VDC two-conductor shielded 14 to 22 AWG stranded
within conduit
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Communication:
Modbus RTU over
RS-485
Baud rate:
Start bits:
Data bits:
Parity:
Stop bits:
Re-entry time:
End of msg:
9,600 or 19,200 (selectable)
1
8
none, odd, even (programmable)
1 or 2 (programmable)
500 ms (min time between retries)
silent 3.5 characters
INPUT / OUTPUT
Analog Outputs 4 20- mA, 0 - 5V, 0 - 10 V, 1 - 5V, 2 - 10V
Relays One relay rated 1 A @ 24 VAC/VDC (0.5A, 125V AC UL rating)
IP Rating
Not IP rated. An accessory splash guard is available for areas
requiring additional protection from wash down.
SENSOR
Type Infrared
Range 0 - 3,500 ppm
Squelch* Readings below 75 ppm are squelched by default
Response Time, T
90
< 5 minutes
USER INTERFACE
Display
Green LED Power ON indicator and bright, alpha-numeric LED
real-time display
Audible Alarm
Buzzer; enable/disable
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Visual Alarm Red 4-digit LED display
Alarm Delay Selectable; 0 to 15 minutes
Fault Monitoring Fault codes presented to user
ENVIRONMENTAL
Operating
Temperature
-30°C to 40°C (-22°F to 104°F)
Operating
Humidity
5 - 90% RH non-condensing
CERTIFICATIONS
CE / UL / CSA / IEC / EN 61010-1
NOTE: * When ltering is disabled (see Parameter P.-19 on page 48), the unit will respond
to concentrations sub -10 ppm.
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4.2 Enclosure Dimensions
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5 FEATURES
5.1 Front Exterior Enclosure
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NUMBER FEATURE FUNCTION
Power LED Green LED, indicates unit power is ON.
4-digit LED Display
Alpha-numeric display (to show concentration in
real-time)
Information Button
Used to access the parameter list. Used to back up
one level without writing to memory when the
parameter list is active. Used to mute the audible
alarm for the time period congured in parameter
P.-12.
Up Button
Used to increment the value or parameter
displayed.
Down Button
Used to decrement the value or parameter
displayed. (When the Up Button and Down
Button are pressed and held together for 5
seconds, this key combination manually zeroes
the gas detector.)
Enter/Select Button
Saves the currently displayed parameter to
memory.
Cable Glands
(2 places)
Pre-installed cable gland is on the left. The
optional cable gland is on the right (if installed).
See Section 7 Wiring and Conguration.
Test Gas Port Used to connect the regulator during testing.
20 © 2014 All rights reserved. Data subject to change without notice.
ART - Operation Manual Rev. 1 | 2014.02
5.2 Interior System Layout
5.2.1 Front of the Enclosure
NUMBER FEATURE FUNCTION
IR Bench Location of the Infrared sensor.
Relay
Pluggable terminal for relay connection.
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Rev. 1 | 2014.02 ART - Operation Manual
Modbus end of line
jumper
Critical for good communication.
Audible alarm
Default setting is enabled.
5.2.2 Back of the Enclosure
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