Instruction Manual
Chillgard® RT
Refrigerant Monitor
Order No.: 814073/18
MSAsafety.com
THIS MANUAL MUST BE CAREFULLY READ BY ALL INDIVIDUALS WHO HAVE OR WILL
HAVE THE RESPONSIBILITY FOR INSTALLING, USING OR SERVICING THE PRODUCT.
Like any piece of complex equipment, this instrument will perform as designed only if it
is installed, used and serviced in accordance with the manufacturer’s instructions.
OTHERWISE, IT COULD FAIL TO PERFORM AS DESIGNED AND PERSONS WHO RELY
ON THIS PRODUCT FOR THEIR SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY
OR DEATH.
The warranties made by Mine Safety Appliances Company with respect to the product
are voided if the product is not used and serviced in accordance with the instructions in
this manual. Please protect yourself and others by following them. We encourage our
customers to write or call regarding this equipment prior to use or for any additional
information relative to use or repairs.
WARNING
1000 Cranberry Woods Drive
Cranberry Township, PA 16066
USA
Schlüsselstrasse 12
8645 Rapperswil-Jona
Switzerland
For your local MSA contacts please go to our website www.MSAsafety.com
©
MSA 2016. All rights reserved
1.
Warranty- Seller warrants that this product will be free from
mechanical defect or faulty workmanship for a period of eighteen
(18) months from date of shipment or one (1) year from installation,
whichever occurs first, provided it is maintained and used in
accordance with Seller’s instructions and/or recommendations.
This warranty does not apply to expendable or consumable parts
whose normal life expectancy is less than one (1) year such as,
but not limited to, non-rechargeable batteries, filament units, filter,
lamps, fuses etc. The Seller shall be released from all obligations
under this warranty in the event repairs or modifications are made
by persons other than its own or authorized service personnel or if
the warranty claim results from physical abuse or misuse of the
product. No agent, employee or representative of the Seller has
any authority to bind the Seller to any affirmation, representation or
warranty concerning the goods sold under this contract. Seller
makes no warranty concerning components or accessories not
manufactured by the Seller, but will pass on to the Purchaser all
warranties of manufacturers of such componen
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED, IMPLIED OR STATUTORY, AND IS STRICTLY
LIMITED TO THE TERMS HEREOF. SELLER SPECIFICALLY
DISCLAIMS ANY WARRANTY OF MERCHANT ABILITY OR OF
FITNESS FOR A PARTICULAR PURPOSE.
2.
Exclusive Remedy- It is expressly agreed that Purchaser's sole
and exclusive remedy for breach of the above warranty, for any
tortious conduct of Seller, or for any other cause of action, shall be
the repair and/or replacement at Seller's option, of any equipment
or parts thereof, which after examination by Seller is proven to be
defective. Replacement equipment and/or parts will be provided at
no cost to Purchaser, F.O.B. Seller's Plant. Failure of Seller to
successfully repair any non-conforming product shall not cause the
remedy established hereby to fail of its essential purpose.
3.
Exclusion of Consequential Damage- Purchaser specifically
understands and agrees that under no circumstances will seller be
liable to purchaser for economic, special, incidental or
consequential damages or losses of any kind whatsoever, including
but not limited to, loss of anticipated profits and any other loss
caused by reason of nonapplicable to claims for breach of warranty, tortious conduct or any
other cause of action against seller.
MSA Permanent Instrument Warranty
ts.
operation of the goods. This exclusion is
i
General Warnings and Cautions
1.
The monitor and Relay Module described in this manual must be
installed, operated, and maintained in strict accordance with the
labels, cautions, warnings, instructions, and within the limitations
stated.
2.
The monitor must not be installed in outdoor areas or in locations
where explosive concentrations of combustible gases or vapors
might occur in the atmosphere: Class I, Group A, B, C, and D
areas as defined by the NEC. Because the monitor is not
explosion-proof, it must be located in non-hazardous areas.
3.
The Chillgard RT Refrigerant Monitor is designed to detect one
particular refrigerant gas or vapor at ambient atmospheric
pressures. The unit will not detect refrigerant gas at elevated
temperatures.
4.
High levels of or long exposure to certain compounds in the tested
atmosphere may contaminate the sensor. In atmospheres where
the system may be exposed to such materials, perform calibration
frequently to ensure dependable system operation and accurate
indications.
5.
Do not paint the Chillgard RT System. Also, do not paint near any
of the sample line inlets to ensure paint is not deposited on the
sample inlet fitting of the units. Such p
with the sampling process, whereby a sample of the atmosphere
being monitored is drawn into the Chillgard RT System.
6.
The only absolute method to assure the proper overall operation of
a gas detection instrument is to check it with a known
concentration of the gas for which it has been calibrated.
Consequently, a calibration check must be included as part of the
installation and as a routine inspection of the system.
7.
Perform periodic leak checks on all the sample lines and all flow
system components and fittings of the Chillgard RT System.
8.
Use only genuine MSA replacement parts when performing any
maintenance procedures provided in this manual. Failure to do so
may impair instrument performance. Repair or alteration of the
Chillgard RT System, beyond the scope of these maintenance
instructions or by anyone other than authorized MSA service
personnel, could cause the product to fail to perform as designed,
and persons who rely on this product for their safety could sustain
serious personal injury or death.
WARNING
aint deposits would interfere
ii
9.
Properly vent the exhaust of the Chillgard RT System to a safe
area. Improper venting of the exhaust may cause serious personal
injury or death.
10.
Ensure the gas sample to the system is clean and non-condensing.
Install end-of-line filters in all sample inlet lines.
11.
Avoid any installation where condensation may form. Condensation
may possibly clog or block the sampling line; this will prevent the
instrument from receiving new or fresh gas samples from the area
being monitored.
12.
The Chillgard RT Refrigerant Monitor must be installed, located
and operated in accordance to all applicable codes. These codes
include, but are not limited to, the National Fire Prevention Code
and National Electric Code.
13.
The Chillgard RT Relay Module must be connected to proper main
voltages. Connection of improper voltages will cause the unit to
fail. The Chillgard RT Relay Module uses the same electrical
ground as the RT Monitor.
14.
Protect the Chillgard RT Relay Module from vibration and heating;
otherwise, improper operation may result, which can result in
personal injury or death.
15.
Do not exceed the relay contact ratings listed in Appendix B,
TABLE B-1 Otherwise,
relay operation may fail, which can result in
personal injury or death.
Failure to comply with the above warnings can result in
serious personal injury or death.
1.
Do not attempt to modify or adjust the sensing element.
CAUTION
iii
Chapter 1
General Information ........................................ 1-1
Introduction ...................................................................... 1-1
Table 1-1. Chillgard RT System
General Operating Specifications .................... 1-2
Identifying Your Unit ........................................................ 1-3
Multipoint Sequencer .................................................... 1-3
Figure 1-1. Identifying your Unit ............................... 1-4
Figure 1-2. Single Point Sequencer Unit .................. 1-5
Figure 1-3. Four Point Sequencer Unit ..................... 1-5
Figure 1-4. Eight Point Sequencer Unit .................... 1-5
Beacon .......................................................................... 1-6
End of Sample Line Filters ........................................... 1-6
General Description ......................................................... 1-6
The Chillgard RT Unit: .................................................. 1-6
Figure 1-5. Chillgard RT Monitor
with Optional Beacon ...................................... 1-6
The Internal Multipoint Sequencer Unit: ....................... 1-7
Terminology ..................................................................... 1-8
Applications ..................................................................... 1-9
Sensor Selectivity* ........................................................... 1-9
Table 1-2. Typical Chillgard RT System for
R-11 Cross-Sensitivity Response Data ........... 1-9
Table 1-3. Typical Chillgard RT System for
R-12 Cross-Sensitivity Response Data ......... 1-10
Table 1-4. Typical Chillgard RT System for
R-22 Cross-Sensitivity Response Data
Table 1-5. Typical Chillgard RT System for
R-123 Cross-Sensitivity Response Data ....... 1-11
Table 1-6. Typical Chillgard RT System for
R-134a Cross-Sensitivity Response Data ..... 1-11
Table 1-7. Typical Chillgard RT System for
R-113 Cross-Sensitivity Response Data ....... 1-12
Table 1-8. Typical Chillgard RT System for
R-114 Cross-Sensitivity Response Data ....... 1-12
Table of Contents
......... 1-10
iv
Table 1-9. Typical Chillgard RT System for
R-500 Cross-Sensitivity Response Data ....... 1-12
Table 1-10. Typical Chillgard RT System for
R-502 Cross-Sensitivity Response Data ....... 1-13
Table 1-11. Typical Chillgard RT System for
Ammonia*
Cross-Sensitivity Response Data .................. 1-13
Table 1-12. Typical Chillgard RT System for
R-404a Cross-Sensitivity Response Data ..... 1-14
Chapter 2
Installation and Set-up .................................... 2-1
Receiving ......................................................................... 2-1
Unpacking the System .................................................... 2-1
Initial Inspection ............................................................ 2-1
WARNING ........................................................... 2-1
Location of the Monitor .................................................... 2-2
Instrument Location Guidelines .................................... 2-2
WARNING ........................................................... 2-2
Figure 2-1. Front Door Latches ................................ 2-2
Guidelines for Locating the Sampling Point(s) ................ 2-3
Equipment Configuration .............................................. 2-3
Figure 2-2. Typical Monitor Installation .................... 2-4
Activity in the Room ...................................................... 2-5
CAUTION ............................................................. 2-5
Mounting the Unit ............................................................ 2-6
Sample System Installation ............................................. 2-6
WARNING ............................................................ 2-6
WARNING ............................................................ 2-6
Wiring Connections ......................................................... 2-7
Opening the Unit ........................................................... 2-7
CAUTION ............................................................. 2-7
CAUTION ............................................................. 2-7
Figure 2-3a. Mounting Dimensions ........................... 2-8
Figure 2-3b. Mounting Dimensions ........................... 2-9
Unit Power Wiring .......................................................... 2-10
Power Supply Wiring .................................................. 2-10
CAUTION ........................................................... 2-10
Figure 2-4. Primary Power Wiring .......................... 2-10
v
Wiring the Chillgard RT Unit ....................................... 2-11
Analog Signal Output Wiring (FIGURE 2-5) ............... 2-11
4-20 mA ...................................................................... 2-11
0-10 VDC .................................................................... 2-11
RS 232 Output ............................................................ 2-12
Figure 2-5. Wiring Connections .............................. 2-12
Ferrite Bead Installation .............................................. 2-13
Figure 2-6. Ferrite Bead Installation ....................... 2-13
CAUTION ........................................................... 2-13
Optional Alarm Beacon ............................................... 2-14
Relay Outputs ............................................................. 2-14
Alarm Relays ............................................................... 2-14
Trouble Relay .............................................................. 2-15
Trouble Relay Connection Wiring ............................... 2-15
Remote Reset ............................................................. 2-15
Audible Alarm Output .................................................. 2-16
Auxiliary Input - Use UL Listed Devices ..................... 2-16
Initial Calibration ............................................................ 2-16
CAUTION ........................................................... 2-16
Multipoint Sequencer Operation .................................... 2-17
Chapter 3
Start-up and Initial Adjustments .................... 3-1
Figure 3-1a. Display Screen Overview ..................... 3-2
Figure 3-1b. Display Screen Overview Continued 3-3
Figure 3-2a. Start-up and
Normal Operation Screens .............................. 3-4
Figure 3-2b. Start-up and
Normal Operation Screens Continued ............ 3-5
Figure 3-3a. Setup Screens ...................................... 3-6
Figure 3-3b. Setup Screens Continued .................... 3-7
Figure 3-4. Span Calibration ..................................... 3-8
Figure 3-5. Zero Calibration ...................................... 3-9
Figure 3-6. Check Calibration ................................. 3-10
Figure 3-7. Diagnostic Screens .............................. 3-11
Figure 3-8. Diagnostic Screens .............................. 3-12
Figure 3-9. Diagnostic Screens .............................. 3-13
Figure 3-10. Data Screens ...................................... 3-14
vi
Figure 3-11. Sequencer Set-up Screen .................. 3-15
Figure 3-12. Sequencer Set-up Screen .................. 3-16
Figure 3-13. Alarm Level Screen ............................ 3-17
Figure 3-14. Alarm Latching Screen ....................... 3-18
Figure 3-15. Alarm Latching Screen ....................... 3-19
Figure 3-16. Audio Alarm Screen ............................ 3-20
Figure 3-17. Analog Output Screen ........................ 3-21
Figure 3-18. Aux Alarm Screen ............................... 3-22
Figure 3-19. Auxiliary Alarm Screen ....................... 3-23
Figure 3-20. Setup Time ......................................... 3-24
Figure 3-21. Setup Log ........................................... 3-25
Figure 3-22. Setup Password ................................. 3-26
Figure 3-23. Review Log ......................................... 3-27
Figure 3-24. Review Data ....................................... 3-28
Chapter 4
Calibration ....................................................... 4-1
Introduction ...................................................................... 4-1
Calibration Equipment ..................................................... 4-2
Equipment needed: ....................................................... 4-2
Figure 4-1. Kit Components ...................................... 4-2
Table 4-1. RP Calibration Gases............................. 4-3
Chillgard RT identification ................................................ 4-3
CAUTION ............................................................ 4-3
Figure 4-2. Chillgard RT Models ............................... 4-4
Calibration Procedures .................................................... 4-5
Table 4-2.
Calibration Sequence Screens .............. 4-5
Figure 4-3a. Zero Calibration .................................... 4-6
Figure 4-3b. Zero Calibration Continued .................. 4-7
Figure 4-4. SPAN Calibration .................................... 4-8
Figure 4-5. Ammonia or R-404a Unit Calibration ..... 4-8
WARNING ........................................................... 4-9
vii
Chapter 5
Maintenance .................................................... 5-1
General Maintenance ...................................................... 5-1
Obtaining Replacement Parts ......................................... 5-1
WARNING ........................................................... 5-1
Table 5-1. Replacement Parts ................................. 5-2
Troubleshooting Guidelines (see TABLE 5-2) ................. 5-3
Table 5-2. Troubleshooting Guidelines.................... 5-3
Chapter 6
Data Logging ................................................... 6-1
Log Size ........................................................................... 6-1
Last Values ...................................................................... 6-1
Number of Data Points Used .......................................... 6-1
User Setup Options ......................................................... 6-1
Viewing Alarms/Events and Data .................................... 6-1
Appendix A
Check List ....................................................... A-1
Appendix B
Relay Module .................................................. B-1
General Description………………………………………..B-1
Figure B-1. Relay…………..………………………….B-1
Figure B-2. Mounting the Relay Module…………….B-2
Specifications……………………………………………….B-3
Table B-1. Specifications…………………………….B-3
Figure B-3. Relay Module Main Power Connector
and Communication Cable Connector
Locations………………………………………...B-3
Communication Cable Connections…………………B-4
Figure B-4. Chillgard RT Relay Module Power
Wiring Diagrams for 120 Volts and
240 Volts ………………………………………..B-4
Figure B-5. Chillgard RT Refrigerant Monitor………B-4
viii
Figure B-6. Typical Interface Modules………………B-5
Unpacking the Shipping Carton ...................................... B-6
Identifying the Unit .......................................................... B-6
Table B-2. Part Numbers and Supplied Relays .... B-6
Mounting Your Unit ............................................................... B-6
Electrical Connections for the Chillgard RT
Relay Module ....................................................................... B-6
Main Power Connections ................................................ B-6
CAUTION ................................................................... B-6
Communication Cable Connections ............................. B-7
WARNING .................................................................. B-7
CAUTION ................................................................... B-7
WARNING .................................................................. B-7
Communication Cable Connections
to the Chillgard RT Relay Module ................................... B-8
Communication Cable Connections
to the Chillgard RT Refrigerant Monitor .......................... B-8
Relay Wiring .................................................................... B-8
Operation ............................................................................. B-9
Front Panel ..................................................................... B-9
Power ............................................................................. B-9
Trouble ........................................................................... B-9
CAUTION ................................................................... B-9
WARNING .................................................................. B-9
Ready Indicator ............................................................. B-10
Chillgard RT Relay Module Relays ............................... B-10
The Common Horn Relay ............................................. B-10
The Trouble Relay ......................................................... B-10
The Discrete Caution, Warning and Alarm Relays ....... B-11
Applying Power ............................................................. B-11
Alarm Relay Configuration ............................................
Latching ......................................................................... B-11
Normally Energized/De-energized ................................ B-11
Operation ....................................................................... B-12
Reset Switch ................................................................. B-12
Trouble Relay ................................................................ B-12
Horn Operation .............................................................. B-13
Configuration ................................................................. B-13
Reset Switch ................................................................. B-13
B-11
ix
Maintenance .................................................................. B-13
Troubleshooting ............................................................ B-14
Table B-3. Troubleshooting ................................. B-14
Obtaining Replacement Parts ..................................... B-14
Table B-4. Replacement Parts ............................ B-14
Appendix C
RS-232 Output ................................................ C-1
Introduction ...................................................................... C-1
Figure C-1. RS-232 Location
Table C-1. RS-232 Parameters ....................................... C-2
Three types of messages can be transmitted
from the RS-232 port: ................................................ C-2
Status............................................................................... C-3
Data Logged Value .......................................................... C-3
Alarm Events ................................................................... C-3
Table C-2. Status Message ........................................ C-4
Table C-3. Data Logging ............................................ C-5
RS-232 Output ................................................................ C-6
Table C-4. Alarm Logging........................................... C-6
Figure C-2. Typical RS-232 Wiring ............................ C-7
Remote Gas Sampling Channel Identification ................ C-8
Table C-5. Voltage Output
Corresponds to Channel ................................. C-8
Appendix D
Multi-refrigerant Capability* .......................... D-1
Introduction ...................................................................... D-1
Specifications .................................................................. D-1
Table D-1*. Multi-Refrigerant
Chillgard RT Refrigerant Monitor
Table D-2. Typical Cross Sensitivity
at 100 Parts Per Million (PPM) at 25°C
for the Chillgard RT Refrigerant Monitor
Calibrated at 1000 PPM R11
as Expressed in Response Factors ................ D-2
Identifying Your Unit ........................................................ D-2
x
...................... D-1
Installation ....................................................................... D-2
Figure D-1. Label and RS-232 Location ................... D-3
Figure D-2. Calibration Label .................................... D-4
Figure D-3. Manufacture Date Label ........................ D-4
Initial Setup ............................................................... D-5
Calibration ....................................................................... D-5
Display Screens .............................................................. D-5
WARNING ............................................................. D-5
Figure D-4. Gas by Point Setup Screens ................. D-7
Figure D-5. Alarm Level Screens .............................. D-8
Figure D-6a. Alarm Level Screens ............................ D-9
Figure D-6b. Alarm Level Screens .......................... D-10
xi
xii
Chillgard RT Refrigerant Monitor
Chapter 1
CHILLGARD RT MONITORS EVALU ATED BY UNDERWRITERS LABORATORIES, INC.
R-11
R-502
R-12
R-123
R-113
R-22
R-114
R-134a
R-500
R-404a
General Information
Introduction
This manual provides instructions for the:
• Chillgard RT Monitor
• Chillgard RT unit with Multipoint Sequencer.
These instruments can provide continuous refrigerant gas monitoring
(see TABLE 1-1 for Operating Specifications).
All units listed below have been evaluated by Underwriters Laboratory.
The ammonia units have not been evaluated by Underwriters
Laboratories, Inc.
1-1
Table 1-1. Chillgard RT System General Operating Specifications
PERFORMANCE SPECIFICATIONS
STABILITY
0-50 ppm, +1 ppm; ammonia is 2 ppm
51-1000 ppm, +10% of reading
SHORT TERM NOISE
+1 ppm peak over a 10-minute period;
ammonia* is +2 ppm
LINEARITY
0-50 ppm +1 ppm; ammonia* is +2 ppm
51-1000 ppm, +10% of reading
WARM-UP TIME (READY)
24 hours maximum; typical, 20 minutes at 70°F (21°C)
ambient
RESPONSE TIME
90% of a step-change and alarm condition
within 110 seconds
TRANSPORT TIME
500 FT (152 M) OF
SAMPLING TUBING LENGTH
13 minutes for a 90%
step change
OPERATING
TEMPERATURES
0°C to 50°C (32°F to 122°F)
TEMPERATURE EFFECT
+0.3%/°C of reading, +0.1 ppm/°C
RELATIVE HUMIDITY
0 to 95%, RH non-condensing
SAMPLE FLOW RATE
.75 liter per minute - minimum with maximum tubing
length; typically 1.2 to 1.5 liters per minute with no tubing
MAXIMUM SAMPLE OR
EXHAUST TUBING LENGTH
150 feet (46 m) with 1/8" (3.2 mm) ID tubing, 1/4" (6.4 mm)
0.18" (4.6 mm) ID tubing
OPERATING PRESSURE
ambient atmospheric
OPERATING SPECIFICATIONS
VOLTAGE RATING
100 to 240 VAC, 50-60 Hz
POWER REQUIREMENTS
.88 amps at 120 VAC;
.54 amps at 240 VAC
TROUBLE RELAY
Normally energized, Form C contact: 240 VAC,
8 amp resistive SPDT
WARNING RELAY
One relay, Form C contacts: 240 VAC,
8 amps resistive SPDT
CAUTION RELAY
One relay, Form C contacts: 240 VAC,
8 amps resistive SPDT
ALARM RELAY
One relay, Form C contacts: 240 VAC,
8 amps resistive SPDT
ANALOG OUTPUTS
4 to 20 mA sourcing, 1,000 ohm load, 0-10 V,
2 K ohm load
MAXIMUM OUTPUT SIGNAL
LOAD FOR 4-20 MA OUTPUT
1000 ohms (includes wiring)
AUDIO ALARM DRIVE
OUTPUT
10 VDC 20-ohm load maximum
(available only with non-beacon models)
SAMPLE TUBING
CONNECTIONS
1/4" (6.4 mm) OD
DIMENSIONS
18" high, 16" wide, 7" deep
45.7 cm high, 40.6 cm wide, 17.8 cm deep
SAMPLING TUBING LENGTH
150 FT (46 M) OF
OD (total of Inlet & Outlet); 500 feet (152 m) with
step change
105 seconds for a 90%
1-2
WEIGHT OF CHILLGARD
RT WITH SEQUENCER
45 pounds (20 kg)
TRANSPORT AND STORAGE CONDITIONS
TEMPERATURE
-67°F to 158°F (-55°C to +70°C)
HUMIDITY
99% RH non-condensing
*This unit has not been evaluated by Underwriters Laboratories, Inc.
**For UL2075 testing from 50°C to 61°C, the Temperature Effect is +0.6%/°C of reading
and +1 ppm/°C
For the Chillgard RT Remote Relay* unit option, see Appendix B, "Relay Module."
Th
e Chillgard RT Monitor is intended for indoor use in mechanical
equipment rooms housing air conditioning or refrigeration equipment or
for use in areas where bulk refrigerants are stored.
onitor uses infrared sensing technology, allowing accurate
The m
measurement of refrigerant vapors with minimum interference from
other vapors. Your Chillgard RT unit is factory-calibrated for a specific
refrigerant. It is extremely sensitive, capable of measuring down to 1
part per million (ppm). The unit monitors the signal and can operate
three alarm levels at software-selectable gas concentration values.
There is also a trouble indication to alert the operator when something
is wrong with the unit.
Identifying Your Unit
Multipoint Sequencer
The Chillgard RT Refrigerant Monitor is capable of monitoring different
types of refrigerants. However, each unit is factory-calibrated to detect
one type of refrigerant.
Check t
he label inside the front door to determine what gas your unit is
designed to detect (FIGURE 1-1). For specific guidelines on using the
RS232 function (serial communication port), see Appendix C. For
specific guidelines on the multi-refrigerant version of the Chillgard RT
Monitor, see Appendix D.
The uni
t monitors only one zone or location, but your instrument may
contain a Multipoint Sequencer capable of monitoring up to four or eight
different zones or locations. To determine the number of sampling
locations your particular unit is able to monitor, carefully tilt the unit and
count the number of inlet ports at the bottom of the case (FIGURE 1-2,
1-3 or 1-4).
1-3
1-4
Figure 1-1. I
dentifying your Unit
Figure 1-2. Single Point Sequencer Unit
Figure 1-3. Four Point Sequencer Unit
Figure 1-4. Eight Point Sequencer Unit
1-5
Beacon
The optional beacon is mounted on top of the unit (FIGURE 1-5). It is
powered by the monitor’s internal DC voltage.
d of Sample Line Filters
En
End of sample line filters are required for proper unit operation; they
may be included in the shipping carton.
he end of sample line filters are not included, they must be
If t
purchased. Place an end-of-sample line filter (P/N 711561).
Fi
gure 1-5. Chillgard RT Monitor with Optional Beacon
General Description
The Chillgard RT Unit:
• Monitors refrigerant gases up to 1000 parts-per-million (ppm)
perates on the photo-acoustic principle, allowing refrigerant gas
• O
concentration measurement in a complex mixture of backgroun
gas
es
1-6
d
• Allows refrigerant gas detection in applications where contaminants
or interferants preclude use of other techniques
• Provides a digital display; if it is a multi-point monitor, it also shows
the point number currently being sampled by the unit
• Is also used for applications requiring long-term stability and low
maintenance
• Is factory-calibrated to the full scale value of refrigerant gas
• Is compensated for the relative humidity of the gas to give
excellent zero stability and enable alarms at refrigerant gas levels
as low as 3 ppm.
• Operates over a wide temperature range
• Has front-panel windows for viewing:
• Gas concentration
• Diagnostics
• Alarm Conditions
• Is highly selective to enable operation in:
• Areas with varying humidity
• Areas containing other contaminants.
• Comes standard with:
• Four sets of relay contacts
• Two completely independent outputs:
0-10 V
4-20 mA
• One input: 4-20 mA, assignable to the ALARM relay
• RS 232 output (see Appendix C for more information).
The Internal Multipoint Sequencer Unit:
• Allows a single Chillgard RT unit to monitor up to four or eight
areas or locations, if equipped
• Each point is capable of sampling from remote areas up to 500
feet (152 m) from the Chillgard RT unit
• Contains all necessary flow components (excluding end-of-line filter
and sampling line) to properly sample four or eight areas and
indicate the gas or vapor concentrations.
1-7
Terminology
Become familiar with the following terminology.
ZERO- A ze
air (no refrigerant gas present).
ZEROING- Th
calibration.
N- Full-scale or up-scale reading on meter display.
SPA
NNING- The process of placing a full-scale or span gas on the unit
SPA
during calibration.
N GAS VALUE- The gas concentration that gives the instrument a
SPA
full-scale or up-scale value. This value is printed on the calibration gas
cylinder containing the gas.
FLOW RATE- Vo
EXHAUST G
PUMP- T
the Chillgard RT Monitor.
ALARMS- T
at specific, user-adjustable refrigerant gas concentrations.
(Level 1 = Caution, Level 2 = Warning and Level 3 = Alarm.)
RELAT
given temperature.
ro (0) indication on the meter display usually indicates fresh
e process of placing a zero gas on the unit during
lume of gas drawn through the sample line per minute.
AS- Sample gas after it passes through the sensor.
he electric motor driven device that moves the gas sample to
he Chillgard RT System has three alarms to alert the user
IVE HUMIDITY- The percent of water vapor saturation in air at a
POINT N
drawn. Up to four or eight areas, sequentially numbered from 1 to 8,
can be sampled.
BYPA
drawn from the next area to be sampled. This feature reduces the
monitor response time when long sampling lines are used.
FRESH A
TEMPERAT
instrument (PPM) can change +0.3% for each degree (C) that the
instrument is operating above/below the temperature at which the
instrument was last calibrated.
UMBER- The location or area from which a gas sample is
SS- The Sequencer is a look-ahead system; bypass gas flow is
IR- Air that has no possibility of containing refrigerant gas.
URE EFFECT- The gas response displayed by the
1-8
Applications
The Chillgard RT Monitor is factory-calibrated for a particular refrigerant
gas. When calibrated, the Chillgard RT System is used in a wide variety
of industrial applications, such as:
• detection of refrigerant gases leaking into the atmosphere
• ambient air monitoring for health and safety purposes
Sensor Selectivity*
The Chillgard RT Refrigerant Monitor is factory-calibrated for your
particular refrigerant gas (TABLE 1-3). The system is highly selective to
refrigerant gases in air; however, the system also responds to other
gases (interferants). See TABLES 1-2 through 1-11* for typical crosssensitivities. Actual cross-sensitivities vary from instrument to
instrument. *Typical cross-sensitivities not verified or investigated by UL.
NOTE: These cross-sensitivity values do not apply to a multi-refrigerant
unit where the optics have been adjusted to detect a variety of
refrigerants.
If it is not known whether the gas to be detected is an interferant gas,
contact MSA at 1-800-MSA-INST.
Table 1-2. Typical Chillgard RT System for
R-11 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-11
Acetone 100 14
Methyl Ethyl Ketone 100 32
Methanol 1000 130
iso-Propanol 500 400
Methylene Chloride 100 0
Xylene 100 0
Ammonia 50 0
R 113 100 25
R 11 100 100
R 22 100 30
R 12 983 490
R 134 A 100 20
R 123 100 3
Propane 0.6% 18
Ethylene 500 20
TEST CONDITIONS: Calibrated 0-1000 PPM R-11 in N2; Temperature: 25°C
1-9
Ta
ble 1-3. Typical Chillgard RT System for
R-11 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-12
Acetone 100 3
Methyl Ethyl Ketone 1000 25
Methanol 1000 2
Methylene Chloride 1000 14
Trichloroethylene 1000 167
Ethyl Acetate 1000 22
Xylene (ortho-Xylene) 1000 5
R113 100 35
R11 100 5
R22 100 1
R12 100 100
R134A 100 2
R114 100 45
TEST CONDITIONS: Calibrated 0-1000 PPM R-12 in N
Temperature - 25°C
2;
Table 1-4. Typical Chillgard RT System for
R-22 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-22
Acetone 100 <1
R11 100 16
R123 100 35
R134A 100 25
R1132A 100 40
R22 100 100
R113 100 39
TEST CONDITIONS: Calibrated 0-1000 PPM R-22 in N2; Temperature: 25°C
1-10
Table 1-5. Typical Chillgard RT System for
R-123 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-123
Acetone 100 22
Methyl Ethyl Ketone 500 48
Methanol 100 2
iso-Propanol 100 5
Methylene Chloride 1000 14
Trichloroethylene 1000 4
Ethyl Acetate 100 42
Xylene (ortho-Xylene) 1000 5
Ammonia 910 7
Natural Gas 1000 5
R113 100 80
R11 100 <1
R22 100 4
R12 100 8
R134A 100 140
R123 100 100
TEST CONDITIONS: Calibrated 0-1000 PPM R-123 in N2; Temperature: 25°C
Table 1-6. Typical Chillgard RT System for
R-134a Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-134a
R113 100 17
R11 100 2
R22 100 1
R134A 100 100
R123 100 8
TEST CONDITIONS: Calibrated 0-1000 PPM R-134a in N2; Temperature: 25°C
1-11
Ta
ble 1-7. Typical Chillgard RT System for
R-113 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-113
R11 100 1
R12 100 10
R22 100 5
R123 100 125
R134A 100 175
R114 100 155
R113 100 100
TEST CONDITIONS: Calibrated 0-1000 PPM R-113 in N2; Temperature: 25°C
Table 1-8. Typical Chillgard RT System for
R-113 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-114
R11 100 105
R12 100 50
R22 100 35
R113 100 30
R123 100 3
R134a 100 20
R114 100 100
TEST CONDITIONS: Calibrated 0-1000 PPM R-114 in N2; Temperature: 25°C
Table 1-9. Typical Chillgard RT System for
R-500 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-500
R11 100 8
R22 100 0
R113 100 41
R114 100 60
R123 100 2
R134a 100 7
R502 100 5
R500 100 100
TEST CONDITIONS: Calibrated 0-1000 PPM R-500 in N2; Temperature: 25°C
1-12
Table 1-10. Typical Chillgard RT System for
R-502 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-502
R11 100 25
R22 100 160
R123 100 60
R134a 100 40
R502 100 100
TEST CONDITIONS: Calibrated 0-1000 PPM R-502 in N2; Temperature: 25°C
Table 1-11. Typical Chillgard RT System for
Ammonia* Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM AMMONIA
Acetone 1000 45
Methyl Ethyl Ketone 100 25
Methane 2.5% 5
Iso-Propanol 1000 725
Methylene Chloride 1000 12
O-Xylene 100 7
NH
3
R11 500 50
R22 550 15
R12 100 65
R134a 100 130
R123 100 20
Propane 0.6% 50
Pentane 0.75% 100
Ammonia 100 100
TEST CONDITIONS: Calibrated 0-1000 PPM Ammonia in N2; Temperature: 25°C
*This gas has not been evaluated by Underwriters Laboratories,Inc.for the Chillgard RTunit.
100 100
1-13
Ta
ble 1-12. Typical Chillgard RT System for
R404a Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-404a
R11 100 <1
R12 100 3
R22 100 2
R113 100 30
R123 100 40
R134a 100 56
TEST CONDITIONS: Calibrated 0-1000 PPM R-404a in N2; Temperature: 25°C
1-14
Chapter 2
Installation and Set-up
Receiving
Upon receipt of the unit, inspect the shipping carton for signs of visible
damage. Report any damage to the carrier and note it on the delivery
receipt. The unit must be stored in a dry, secure place prior to its
installation and use. Store unit in the original shipping carton.
Unpacking the System
To unpack the equipment:
1.
Carefully remove the Chillgard RT Monitor from its shipping
container(s) in order to prevent damage to sensitive electrical
components. If any damage is found, report it to the shipper
immediately.
Do not install or operate a damaged unit. It may not function
properly and may not alert you to any gas conditions.
2.
Search through all packing material and containers to avoid
WARNING
Inadvertently discarding usable or valuable parts. Report any
shortages immediately to MSA.
The contents of the shipping carton are:
• instrument
• manual
• end-of-line filters (may be purchased separately).
Retain the original packing form for re-use in the event the unit
must be returned for service.
3.
Using a screwdriver, loosen the two latches on the Chillgard RT
door (FIGURE 2-1) by turning 1/4 turn counterclockwise.
4.
Open the front door.
Initial Inspection
With the front door open, carefully inspect components and assemblies
inside the enclosure. If damage or shortage is evident, advise and
promptly file the proper claim with the carrier.
2-1
Fi
gure 2-1. Front Door Latches
Location of the Monitor
WARNING
This unit must not be located in areas that may contain a
flammable mixture of gas and air; otherwise, an explosion
may occur.
The monitor performance is dependent on its location and sensing pickup location(s). Follow the guidelines listed below before mounting the
monitor.
Instrument Location Guidelines
1.
Select a location where personnel will see the front panel or the
ional beacon before they enter the equipment room or the area
opt
where the monitoring point is located.
2.
Mount the unit vertically; do not mount the unit to structures subject
to vibration and shock, such as piping and piping supports.
3.
Do not locate the unit near an excessive heat source or in wet and
p locations.
dam
2-2
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