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Details standard features for all models, industrial, and high-temperature variants.
Lists optional features and various regulatory approvals for the flame detectors.
Specifies performance metrics for different fire types, distances, and specific models.
Explains multi-spectrum sensing and Fire Event Analysis technology in the Model 860.
Describes single spectrum sensing and user-adjustable parameters in the Model 660.
Covers environmental ratings, hazardous location suitability, and electrical interface specifications.
Provides physical dimensions, installed weight, and shipping weight for the detectors.
Lists available optional accessories like swivel mounts, air shields, and rain shields.
Identifies suitable fire detection applications for hydrocarbon and specified non-hydrocarbon fuels.
Emphasizes adherence to local fire codes and seeking assistance for installation procedures.
Provides step-by-step instructions for mounting, wiring, and securing the detector.
Specifies the required DC power supply voltage, filtering, and grounding for reliable operation.
Details factory settings for time delay, sensitivity, and relay outputs for initial setup.
Explains the function and configuration of fire/fault relays, 0-20mA output, and RS485 interface.
Describes the automatic and manual self-test features for checking detector optics and electronics.
Details how to configure the fire output delay time using potentiometers and switch settings.
Explains UV/IR warning output and how to set the time delay for these outputs.
Adjusts detector sensitivity and selects between normal and high detection speeds.
Configures settings for industrial/hangar applications and Fire Event Analysis levels.
Covers fire output latching, fault relay behavior, and 0-20 mA output logic.
Details self-test activation and RS485 user interface configuration.
Explains how to enable the RS485 serial communication interface for networking detectors.
Defines control/response packets and guides on assigning unique detector addresses for network communication.
Detailed instructions for cleaning UV and IR sensor windows and light guides to ensure performance.
Covers common issues like new installation checks, power supply, and wiring verification.
Addresses causes and solutions for detectors failing to alarm or pass self-test.
Addresses scenarios like false alarms, confidence/fault conditions, and manual test failures.
Explains UV/IR warning output, its causes, and recommended investigation procedures.
Instructions on contacting Firefly AB, repair procedures, and warranty voiding conditions.
Illustrates wiring for power supply, fire loop, fault, test input, RS485, and 0-20mA outputs.
Provides specifications for ordering Model 660, including type, rating, housing, and test features.
Details specifications for ordering Model 860, including fire type, approvals, housing, and relay configuration.
The Omniguard® 660 and 860 Series Optical Flame Detectors are advanced, self-contained, microprocessor-controlled devices designed for reliable fire detection in various industrial and outdoor environments. These detectors are primarily used in applications where sudden fires from hydrocarbon fuels or specified non-hydrocarbon fuels may occur. They are not recommended for detecting smoldering or electrical fire hazards.
The Model 860 flame detectors are multi-spectrum detectors, utilizing patented Fire Event Analysis (FEA)™ discrimination technology. This technology provides a high degree of discrimination by sensing widely separated flame emission spectra, specifically ultraviolet (UV) and infrared (IR) radiation, which are characteristic of hydrocarbon and certain non-hydrocarbon fires. The UV sensor is a stable, highly reliable UV photon sensor tube with a peak response centered around 0.22 microns, optimized for high sensitivity to UV radiation from flames while minimizing response to background radiation like near UV, black light, visible light, sunlight, and blackbody radiation. The IR sensor is responsive to 4.4 microns, a frequency always present in hydrocarbon fires due to excited carbon dioxide molecules. An optional configuration also allows the IR sensor to respond to 2.9 microns, enabling detection of certain non-hydrocarbon fires. The detector's autonull feature eliminates interference from background radiation in these regions. The Model 860 requires the coexistence of UV and IR radiation in specific ratios that conform to the radiation pattern of specific fires, ensuring high discrimination between fire and non-fire sources.
The Model 660 flame detectors are single-spectrum detectors, using the same ultraviolet sensor tube as the Model 860. These detectors require a signal within the UV sensor's detection envelope to be present at a predefined strength for a specified time duration. Both the 660 and 860 series are compatible with most alarm panels without needing a separate controller.
Sophisticated signal processing is accomplished through microprocessor technology. Automatic self-testing of the electronics, sensors, and optical surfaces is performed using light guides. These light guides direct radiant energy from a calibrated internal source lamp to the sensors, allowing the detector to determine if its windows are contaminated to the point of obscuring fires. This self-interrogation occurs at least four times per hour, ensuring ultimate fire detection reliability.
The detectors are microprocessor-based and offer user-adjustable settings for time delays, latching or non-latching fire relays, sensitivity, and normally open (NO) or normally closed (NC) relay outputs. They provide LED indications for fire (red) and fault (amber) conditions. Transient voltage (surge) protection is included, and an RS485 addressable user interface allows for network integration. The terminal block accepts 22 to 12 AWG wire.
Industrial models include a 0 to 20 mA output and relay contacts rated at 2 Amps @ 30 VDC (Resistive). High-temperature models have relay contacts rated at 4 Amps @ 30 VDC (Resistive).
The detectors are designed for a 120-degree horizontal field-of-view and an 80-degree vertical field-of-view. Response times vary depending on the model and fire type: 50 milliseconds to a saturating signal, typically one second for a 1 ft. by 1 ft. gasoline and N-heptane fire at 50 feet, and two seconds or less for larger JP-4, JP-8, Jet A, Jet B, AVTUR, or AVGAS fires at 100 feet. The Model 860-1XXXX offers rapid detection of silane, hydrazine, and hydrogen flames. The Model 660 in high-speed setting can respond to a saturating UV source in 15 milliseconds.
User-selectable factory settings allow customization of time delays (3 seconds for fire, 35 seconds for UV or IR warning on 860 models), sensitivity (Fire Event Analysis Level I for 860 Industrial, Level 2 Normal for 660), and relay configurations (normally open, latching for fire; normally open, failsafe, non-latching for fault). Optical self-test is automatic for self-test models. The 0 to 20 mA output can be turned off, and RS485 is configurable for HI-Z mode.
The fire outputs can be configured to delay up to 25 seconds before annunciation, with a factory setting of 3 seconds, adjustable via a potentiometer. For the Model 660 in high-speed option, the maximum delay is 400 milliseconds. The Model 860 also offers a UV or IR warning output, which can be enabled to alert users to high levels of UV or IR within the field-of-view, such as from welding or sparks. This warning helps prevent unwanted alarms and can be delayed for up to 63 seconds.
The RS485 User Interface (UI) allows up to 31 detectors to be networked to a controller, enabling serial communication and remote management. Detectors can be programmed with unique addresses from 01 to 31.
The Omniguard® 660 and 860 flame detectors are designed for years of trouble-free operation with minimal attention. However, periodic cleaning of the optical surfaces is essential to maintain reliable fire protection, as contaminants like dust, oil, and paint can reduce sensitivity and lead to auto-test failures. The frequency of cleaning depends on environmental conditions.
For models with light guides (660-XX1XX and 860-XX1XX), the UV sensor window, UV light guide end, IR sensor window, and IR light guide end should be cleaned. For models without light guides (660-XX0XX and 860-XX0XX), only the optical surfaces need cleaning. Cleaning should be done with a cotton swab wetted with commercial liquid glass cleaner, ammonia, methanol, or isopropyl alcohol, followed by rinsing with clean water and drying with lens-quality cloth. Methanol can be used to remove smudges. Care must be taken not to scratch the optical surfaces.
The detectors perform automatic self-tests approximately every 15 minutes (or every 2 minutes for 660 models in high-speed setting) to check optics and electronics. A fault condition due to dirty optical surfaces requires cleaning and resetting the detector.
Troubleshooting guidelines are provided for new installations, failure to alarm, alarm conditions without fire, confidence conditions, fault conditions, manual test failures, and UV or IR warnings. These guidelines help diagnose issues related to wiring, power supply, optical cleanliness, and switch settings. For instance, if a detector fails to alarm, inspecting and cleaning sensor windows is the first step. If a fault relay is inoperative, isolating contacts and checking wiring connections is recommended.
The manual test feature allows users to actuate a test by connecting a terminal to the power supply, which checks the optical and electronic systems. During a manual test, the fire outputs will activate, and the red LED will turn on. It is crucial to disable extinguishing circuits before performing manual tests.
The UV or IR warning feature helps identify persistent sources of intense UV or IR radiation, such as welding or sparks, which could potentially cause a fire or reduce detector sensitivity. If a warning persists after blocking the sensor windows, it may indicate a faulty sensor requiring repair.
The electronic modules are not field-serviceable, and unauthorized attempts to repair or recalibrate the detector will void the warranty. For service and repair, users should contact Firefly AB or their distributor. Detectors should be carefully packed in original shipping cartons with ample packing material to prevent damage during transport.
General| Detection Angle | 90° |
|---|---|
| Power Supply | 12-24 VDC |
| Protection Class | IP65 |
| Humidity | 95% RH, non-condensing |
| Enclosure | IP65-rated |
| Certifications | CE, FCC |
| Response Time | ≤2 seconds |
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