916 PACIFIC AVE MRI BUILDING 2024-04-15

Rate Compensation Typical Wiring 302 Series sensors feature rate compensation,which improves performance by offsetting thermal lag,an inherent property of 4 Black conventional fixed temperature heat sensors. \ / To control End of A slow rate of temperature rise allows the heat to penetrate the panel or 40302 Series Detectors Line o$ 1 inner expansion struts.The tubular shell and the struts expand next device 4 "' Resistor slowly until the total device has been heated to its rated tempera- ture level of 135°F(57.2°C)or 194°F(90°C).At this point,the k silver contact points close and an alarm is initiated. White When subjected to a rapid rate temperature rise,there is not as much time for heat to penetrate the inner strut. However,the rapid lengthening of the shell allows the struts to come together at a lower level. Electrical Rating When the surrounding air temperature returns to below the rated Voltage Current level,the shell contracts,forcing the contacts to open,thus auto- - 6-125 VAC 5 amps matically resetting the sensor. 6-25 VDC 1 amp 125 VDC 0.5 amp Maintenance 302 Series heat sensors are low maintenance.Sensors automati- cally restore when temperatures drop below their rated tempera- tures.The accumulation of dust and dirt does not normally affect Fine silver contact the sensors'operation. Expansion struts _High expansion sensing shell,0.040 anodized aluminum Testing apt Heat control sleeve iC Setting screw Testing for operation is simple and can be done before or after the Devcon hermetic seal sensor has been installed.Heat the sensor with a hair dryer(do not use any device with an open flame to test sensors).The sen- sor should operate shortly after the hot air is applied. Refer to NFPA 72, National Fire Alarm Code and/or the local authority having jurisdiction to determine testing frequency, record keeping,and other testing considerations. Detector Spacing Model 302 302-AW 302-ET 302-EPM UL-Vertical Spacing 50'x 50' 50'x 50' 50'x 50' 40'x 40' (all models) - (15.2 x 15.2 m) (15.2 x 152 m) (15.2x152m) (12.2 x 12.2 m) UL-Horizontal Spacing 40'x 40' 40'x 40' 40'x 40' 30'x 30' (all models) (12.2 x 12.2 m) _ (12.2 x 12.2 m) (12.2 x 12.2 m) (9.1 x 9.1 m) FM-Horizontal 30'x 30' 30'x 30' 30'x 30' or vertical spacing." (9.1 x 9.1 m) (9.1 x 9.1 m) (9.1 x 9.1 m) Not Listed Spacing is based on smooth ceilings that are up to 10'(3 m)high.Refer to NFPA 72 for ceilings that are not considered smooth or are higher than 10'(3 m). EPM models are not FM approved. Dimensions WARNING-Use For Property Protection Only:Heat detectors do not protect life against fire and smoke.In most fires,hazardous levels of smoke,heat and toxic gases can build up before a heat sensor would initiate an alarm.Independent studies indicate that heat sensors should only Model ET EMP be used when property protection alone is involved.In cases where life safety is a factor,the use Tube Length 3"(76.2 mm) 3"(76.2 mm) of smoke detectors is recommended. Tube Diameter 0.5"(12.7 mm) 0.5"(12.7 mm) Under no circumstances should heat detectors be relied upon as the sole measure to ensure fire NPT Thread 0.5"(12.7 mm) 0.5"(12.7 mm) safety.However,it they are spaced in accordance with the specifications found under Application, these sensors can contribute,within an overaA fire safety program,to reducing the risk ofavoid- ro 1.25"(31.75 mm) able property losses, Hex Base 1"(25.4 mm)plastic brass When used with automatic fire suppression systems such as pre-action and deluge sprinkler systems,carbon dioxide systems,halon systems,and dry chemical systems,at least two sen- sors should be used to initiate the alarm.This is commonly referred to as cross-zoning or priority matrix zoning and is necessary to eliminate premature discharge of the system.Refer to NFPA 72 for more information. g(� Page 2 of 4 E8500 1f-0589 Issue 1.2