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 !