e very l ife h as a p urpose… chillgard ® rt refrigerant monitors
TRANSCRIPT
EVERY LIFE HAS A PURPOSE…
Chillgard® RT Refrigerant
Monitors
AGENDA
Why Monitor Refrigerants? Photoacoustic Infrared Detection Chillgard RT Features and Benefits BACnet Capabilities Summary
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
Why Monitor?
ASHRAE GuidelinesASHRAE 15
Why Monitor?
•MSA offers a variety of devices to meet this requirement
•Strobes
•Horns
•Remote Display
•Signs per specification
ASHRAE 15 requires Entry-Way Signaling at each entrance of a Mechanical Room
Why Monitor?
ASHRAE Guidelines
ASHRAE 147: The Green Standard - Acknowledges Ozone Depletion and EPA Clean Air Act
Why Monitor?
ASHRAE Guidelines
Where They Are Used SCHOOLS UNIVERSITIES DATA CENTERS COMMERCIAL BUILDINGS HOTELS CASINOS HOSPITALS CONVENTION CENTERS INDUSTRIAL PLANTS
Who are the Customers?
● Chiller manufacturers
● Building Control Companies
● Contractors - HVAC & Mechanical
● End Users -Direct sales
● Hospitals, Universities, Government
Both absorptive and photoacoustic techniques utilize infrared energy of a selective wavelength.
Majority of gases absorb infrared energy of various wavelengths.
Infrared Detection Methodology
The wavelength selected for use in detection is determined by the gas in use and its specific characteristics.
Photoacoustic InfraredGas Detection Technology
To better understand the advantages of Photoacoustic Infrared Technology, we will briefly compare it to the older, more commonly used Absorptive Infrared Technology.
PhotoacousticInfraredTechnology
AbsorptiveInfraredTechnology
How Does It Differ?
Infrared Technology
YellowYellow is an infrared wavelength used to detect this specific gas.
Red is representative of a typical gas absorption characteristic.
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).
In this example, infrared sources deliver infrared energy through separate sample and reference cells to separate sample and reference detectors.
Absorptive Technique
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
Photoacoustic Infrared Technology
Has been in use since the 1960’S
MSA – 10 Years of experience in PIR gas monitors
Has replaced many traditional infrared analyzers as well as other sensing technologies
Photoacoustic Infrared Gas Detection
The ability to sense a leak as low as in the PPB level for some applications.
Photoacoustic Infrared sensing technology differs from all other available detection techniques on the market.
It has 2 distinct advantages:
The ability to operate long periods of time without adjustment or zero drift, a common problem with all other technologies in use today.
Basic PIR Cell Assembly
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 gasselected for specific applicationOptical 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
CHILLGARD RT REFRIGERANT MONITOR
1, 4, or 8 Channel Configuration
All Refrigerants & Ammonia
Standalone Sample Draw System
Chillgard RT Monitor
Premier Monitor on the Market
NEMA 4 Design
Multiple Refrigerants, up to 6
Refrigerants Detected
R11, 12, 22, 123, 134A 400 Series Refrigerants including R410A and R407C 500 Series Refrigerants New Refrigerants such R1234YF Ammonia
There isn’t a commercially available refrigerant that we can’t detect!
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
UL2075 Performance to 1ppm
Photoacoustic Infrared Sensor
Meets ASHRAE 15 & 147 Requirements
Chillgard RT Monitor
Direct Measurement Technique
Chillgard® RT Monitor
Text Message Display
Data Logging via RS-232
4-20 mA or 0-10V Output
Local Event and Diagnostics
3 Levels of Alarm Relays plus Fault
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.
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.
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
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
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.
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
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.
How to order and notes
Contact MSA’s 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
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
Questions?
THANK YOU !