Toxalert Tox-Refrig - Manual (Page 3)

TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 • 952/472-4541 • 952/472-4960
www.toxalert.com
Mounting height of refrigerant sensors should be within 20 inches of the floor. The Forward of Std. 15-2010 states ,
“(all commonly used refrigerants, except ammonia (R-717)….. are heavier than air).” By placing the sensor below the
common breathing height of 5 to 6 feet, you will provide and added margin of safety.
Floor Plan Location- If ventilation equipment is running continuously, the sensor should be located between the
refrigeration system and room exhaust, as close to the refrigerant equipment as possible. One sensor will usually be
adequate for applications with two (or less) chillers, provided chillers are aligned for good air flow and both chillers use
the same refrigerant. If ventilation equipment is NOT running continuously or if the direction of airflow is not obvious-
locate the sensor(s) next to the refrigeration system. As a general guideline, a refrigeration system should not be more
than 50 feet from a refrigeration sensor.
NOTE: See Toxalert Technical Bulletins- “ToxRefrig InstRec- Section 5 (of the product catalog)”.
The following is a partial list of refrigerants that Toxalert monitors.
TABLE 1
Refrigerant Name TLV-
TWA
(a)
PPM
Refrigerant Name TLV-
TWA
PPM
Safety Group A1 (b)
R-11 Trichoroflouremethane 1100 R-402A R-125/290/22 1000
R-12 Dichlorodifluoromethane 18000 R-404A R-125/143a/134a 1000
R-13 Chlorotrifluoromethane 1000 R-407C R-32/125/134a 1000
R-13B1 Bromotrifluoromethane 1000 R-410A R-32/125 1000
R-14 Tetrafluoromethane (Carbon
Tetrafluoride) 1000 R-500 R-12/152a 1000
R-22 Chlorodifluoromethane 1000 R-502 R-22/115 1000
R-113 Trichorotrifluoroethane 1000 R-503 R-23 & R-13 1000
R-114 Dichlorotetrafluoroethane 1000 R-507 R-125 & R-143a 1000
R-115 Chloropentafluoroethane 1000 R-740 Argon …..
R-134a 1,1,1,2-Tetrafluoroethane 1000 R-744 Carbon Dioxide 5000
Safety Group A2
(b)
R-142b 1-Chloro-1, 1-Diflurorethane 1000 R-152a 1,1-Difluroethane 1000
Safety Group A3 (b)
R-170 Ethane 1000 R-600a 2-Methyl propane
(Isobutane 1000
R-290 Propane 1000 R-1150 Ethene (Ethylene) 200
R-600 Butane 1000 R-1270 Popene (Propylene) 500
Safety Group B1
(b)
R-123 2,2-Dichlor-1, 1,1-Triflurooethane 50 R764 Sulfur Dioxide …..
Safety Group B2
(b)
R-40 Chloromethane (Methyul
Chloride)
…..
R-717 Ammonia 25
R-611 Methyl Formate 100
(a) threshold limit value time weighted average: the time – weighted average concentration for a normal 8-hour
workday and a 40 hour work week to which nearly all works may be repeatedly exposed, day after day, without
adverse effect (as defined by ACGIH®). TLV® is a trademark of the American Conference of Governmental
Industrial Hygienists (ACGIH®).
(b) Defined by ANSI/ASHRAE Standard 34-2010
Note – See Toxalert Technical Bulletin Refrig for more information on refrigerant classifications.