Functional Test: Heat the unit with a heat gun, hair dryer or heat lamp. When the bulb in the control unit changes state, remove heat source and allow the unit to cool. Reset control unit. Test lamp must change state and stay changed after system is reset.
How do you test a stick heat detector?
3) The detector can be tested by applying a gentle heat source such as a hair dryer or other device specifically designed for testing heat sensitive detectors. ( ) A hair dryer held 6-8 inches from the detector will cause it to operate on its rate-of-rise within 8-12 seconds.
What is Fenwal system?
The Fenwal system uses a slender inconel tube packed with thermally sensitive eutectic salt and a nickel wire center conductor. When the fire has been extinguished or the critical temperature lowered, the Fenwal system automatically returns to standby alert, ready to detect any subsequent fire or overheat condition.
At what temperature does a heat detector activation?
around 135 degrees
Typically, the preset temperature that triggers the alarm is around 135 degrees. High temperatures are a good indicator of fire (unless you have your heater set to 135 degrees). Both the rate-of-rise detectors and the fixed temperature detectors are great for sensing fires.
How do I reset my heat detector?
Resetting the Alarm
- Turn off the power to the smoke alarm at the circuit breaker.
- Remove the smoke alarm from the mounting bracket and disconnect the power.
- Remove the battery.
- Press and hold the test button for at least 15 seconds.
- Reconnect the power and reinstall the battery.
What are the three components of the Fenwal sensing element?
The Fenwal sensing element consists of a small (. 089 inch OD), lightweight, flexible Inconel tube with a nickel wire center conductor. The tube is packed with insulation impregnated with a special salt compound and is hermetically sealed.
What type of current is used in the Fenwal system?
The Fenwal 732 features a universal 120/240 V, 50/60 Hz AC Power Supply Unit with a robust 5.4 Amps of 24 Vdc power.
Can dust activate a heat detector?
Heat detectors have been around for decades and are commonly found in restaurants, auditoriums, or industrial environments. This is because in these environments, deceptive phenomena such as cooking fumes, dry ice, or dust can cause smoke detectors to generate false alarms.
Where heat detectors are required?
Heat alarms are recommended for placing directly in kitchens and in unconverted loft space. All alarms should be interlinked (either using hard wiring or wireless interlink) to ensure audibility throughout the property in the event of an alarm being activated.
How often should heat detectors be replaced?
every ten years
In accordance with the National Fire Protection Association (NFPA), Kidde recommends replacing smoke and heat alarms every ten years, and replacing carbon monoxide and combination alarms every seven to ten years (depending on your model) to benefit from the latest technology upgrades.
Do heat detectors expire?
That is, if heat increases rapidly or the temperature reaches the fixed threshold. Heat detectors do need to eventually be replaced, though. Normally, heat detectors can last up to ten years whenever operating.
How does a Fenwal single element system operate?
The Fenwal Continuous Fire Detection System stands alone in its field with the unique ability to detect specific overheat conditions at any point along the entire length of its sensing element run without regard for rate of temperature rise or average ambient temperature.
Is the Fenwal detect-a-fire detector UL approved?
Fenwal DETECT-A-FIRE detectors are UL and ULC listed and FM approved as fire detection thermostats (close on temperature rise) and as releasing devices (open on temperature rise). TABLE 7 Hazardous Locations Detector Type Fitting Required For UL & ULC Listing and FM Approval
What are the UL521 requirements for low temperature exposure testing?
Per UL521 requirements – low temperature exposure test is -22°F (-30°C). e. DETECT-A-FIRE detectors are designed for long life expectancy, however due to various field conditions it is required that the detectors be tested annually per NFPA guidelines or local fire codes.
What temperature should I Set my detect-a-fire?
Fenwal suggests selecting a DETECT-A-FIRE with a temperature setting a minimum of 100°F above the maximum ambient temperature expected. Table 6 shows three categories of fire detection devices and their relative response levels for reaction to three different rate- of-rise conditions.
What is a horhorizontal detect-a-fire detector?
Horizontal DETECT-A-FIRE detectors are designed for locations where appearance is a factor.
