Chillgard

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Chillgard RT Refrigerant Monitors
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AGENDA

• Why Monitor Refrigerants?
• Photoacoustic Infrared Detection
• Chillgard RT Features and Benefits
• BACnet Capabilities
• Summary

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Why Monitor?

• Personnel Safety inside Mechanical Rooms
• ASHRAE 15 Guideline
• Local Building Codes
• International Mechanical Code
• Economics
• System Efficiency
• Replacement Cost of Refrigerant
• Potential Government (EPA) Fines

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Why Monitor?
ASHRAE Guidelines
ASHRAE 15
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Why Monitor?
ASHRAE Guidelines
ASHRAE 15 requires Entry-Way Signaling at each
entrance of a Mechanical Room

• MSA offers a variety of devices to meet this
  requirement
• Strobes
• Horns
• Remote Display
• Signs per specification

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Why Monitor?
ASHRAE Guidelines
ASHRAE 147 The Green Standard - Acknowledges
Ozone Depletion and EPA Clean Air Act
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Where They Are Used

• SCHOOLS
• UNIVERSITIES
• DATA CENTERS
• COMMERCIAL BUILDINGS
• HOTELS
• CASINOS
• HOSPITALS
• CONVENTION CENTERS
• INDUSTRIAL PLANTS

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Who are the Customers?

• Chiller manufacturers
• Building Control Companies
• Contractors - HVAC Mechanical
• End Users -Direct sales
• Hospitals, Universities, Government

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Infrared Detection Methodology

• Both absorptive and photoacoustic techniques
  utilize infrared energy of a selective
  wavelength.

• Majority of gases absorb infrared energy of
  various wavelengths.

• The wavelength selected for use in detection
  is determined by the gas in use and its
  specific characteristics.

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Photoacoustic InfraredGas Detection Technology
How Does It Differ?
To better understand the advantages of
Photoacoustic Infrared Technology, we will
briefly compare it to the older, more commonly
used Absorptive Infrared Technology.
AbsorptiveInfraredTechnology
PhotoacousticInfraredTechnology
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Infrared Technology
Red is representative of a typical gas absorption
characteristic.
Yellow is an infrared wavelength used to detect
this specific gas.
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Absorptive Technique
All absorptive infrared detection methods differ
from manufacturer-to-manufacturer. However, the
basic principal remains the same.

• Sample and reference measurements must be
  taken.
• The sample cell is exposed to the gas to be
  detected.
• The reference cell is either isolated from the
  gas to be detected or infrared energy outside
  the absorptive wavelength characteristics of the
  gas to be detected is used.
• The two measurements are compared. If they are
  equal, the instrument will indicate zero (0).

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Absorptive Technique
In this example, infrared sources deliver
infrared energy through separate sample and
reference cells to separate sample and reference
detectors.
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Absorptive Technique

• When the gas to be detected is present, it
  absorbs some portion of the sample infrared
  energy
• The reference infrared energy is unaffected by
  the gas to be detected
• The change in ratio of the sample and
  reference detectors is the actual
  concentration of gas present

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Photoacoustic Infrared Technology

• Has been in use since the 1960S
• MSA 10 Years of experience in PIR gas monitors
• Has replaced many traditional infrared analyzers
  as well as other sensing technologies

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Photoacoustic Infrared Gas Detection
Photoacoustic Infrared sensing technology differs
from all other available detection techniques on
the market. It has 2 distinct advantages
The ability to sense a leak as low as in the PPB
level for some applications.
The ability to operate long periods of time
without adjustment or zero drift, a common
problem with all other technologies in use today.
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Basic PIR Cell Assembly
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Photoacoustic IR Optical Bench

• IR source - wire filament emitting multiple
  wavelengths of light
• Chopper (not shown) - used to setup modulation
• Optical filters
• provide sensitivity and selectivity for a given
  gas
• selected for specific application
• Optical block - volume can be changed for
  specific ranges
• Detector- high sensitivity microphone
• Solenoid valves - sample inlet and outlet provide
  seal during photoacoustic gas detection
• Heater and thermostat (not shown) - temperature
  control critical for low PPM or PPB detection

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CHILLGARD RT REFRIGERANT MONITOR
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Chillgard RT Monitor
All Refrigerants Ammonia
Multiple Refrigerants, up to 6
Standalone Sample Draw System
1, 4, or 8 Channel Configuration
NEMA 4 Design
Premier Monitor on the Market
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Refrigerants Detected

• R11, 12, 22, 123, 134A
• 400 Series Refrigerants including R410A and R407C
• 500 Series Refrigerants
• New Refrigerants such R1234YF
• Ammonia
• There isnt a commercially available refrigerant
  that we cant detect!

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Sample Points

• Up to 8 points
• Samples each point for 30 seconds when no gas
  present
• Samples an extra 60 seconds if gas level exceeds
  threshold value
• 150 ft w/ 1/8 inch id tubing
• 500 feet w/ 3/16 inch id tubing

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Chillgard RT Monitor
Photoacoustic Infrared Sensor
Direct Measurement Technique
Meets ASHRAE 15 147 Requirements
UL2075 Performance to 1ppm
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Chillgard RT Monitor
Text Message Display
4-20 mA or 0-10V Output
3 Levels of Alarm Relays plus Fault
Data Logging via RS-232
Local Event and Diagnostics
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Accessories

• Remote relay package
• Provides individual banks of relays for each
  point
• Remote Display
• Provides refrigerant level info before entering
  room
• Filters, Calibration kits, tubing etc.

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BACnet

• BACnet is acronym for Building Automation
  Controls network.
• ASHRAE was a huge proponent in development of the
  protocol. Published as Standard ASHRAE/ANSI Std
  135.
• The key benefit to BACnet is that it allows
  communication across multiple product lines.
• Major Building Controls Companies have migrated
  to BACnet as their choice of communication
  Protocol.

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BACnet capabilities

• Millenium gateway from Industrial Control
  Communications provides BACnet MS/TP output
• Can be connected to a Chillgard L series as well
  as an RT
• Gateways will be loaded with a driver to convert
  from the MSA protocol to BACnet
• PN 10117875 for the Chillgard L Series
• PN 10117876 for the Chillgard RT

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BACnet Gateway

• No configuration is necessary
• Data is automatically mapped into database upon
  protocol selection
• Fixed network characteristics
• 19200 baud rate
• 8 data bits
• 1 start bit
• 1 stop bit
• No parity

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Wiring Instructions

• Connect MSA monitors to the Gateway selected
  RS-485 port using a twisted-pair cable, connected
  as shown in the next slides
• The gateway can be powered from the 12V supply on
  the Chillgard RT Monitor by connecting J14
  terminals 1 (12V) and 3 (GND) to POWER and GND
  Gateway terminals, respectively.

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Wiring to a Chilgard L series

• Connect (RS-485 to optional relay module
  terminal block for Chillgard LC and LE Monitors)
  to terminal A of the gateway, - (RS-485 to
  optional relay module terminal block for L series
  Monitors) connects to terminal B of the
  gateway, the ground terminal G (RS-485 to
  optional relay module terminal block for LC and
  LE) terminal to terminal GND of the gateway
• Install jumper wires connecting terminal A to
  terminal Y, and terminal B to
• terminal Z on the gateway

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Wiring to a Chilgard RT

• Connect / A (J15 terminal 2 or 4 for terminal
  of Chilgard RT to Gateway terminal A, - / B
  (J15 terminal 1 or 3 for Chillgard RT Monitor)
  terminal B and ground terminal GND (J14
  terminal 3 for Chillgard RT Monitor) terminal to
  terminal GND.
• Also install jumper wires connecting terminal A
  to terminal Y, and terminal B to
• terminal Z on Gateway.

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How to order and notes

• Contact MSAs Custom Products group to purchase a
  Chillgard system with BACnet output
• MSA will pre-load the configuration file to
  convert to BACnet based on either an L series or
  an RT
• Gateway will provide BACnet objects that will
  need to be mapped to your network
• Review the default configurations from the
  gateway with regards to the Chillgard mapping

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CHILLGARD RT Summary

• PREMIER MONITOR ON THE MARKET
• PROVEN, RELIABLE PHOTOACOUSTIC INFRARED
  TECHNOLOGY
• CAN DETECT ANY REFRIGERANT DESIRED
• UL 2075 APPROVAL DETECTION TO 1 PPM

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Questions?
THANK YOU !