UV7A4W Fireye Scanner

Overview

The Fireye UV7A4W is a high-sensitivity, non-self-checking ultraviolet (UV) flame scanner designed for industrial combustion safety. Specifically engineered for monitoring gas or oil flames that cycle on and off frequently, it features a NEMA 4 rated enclosure for protection against harsh environmental conditions. The scanner detects UV radiation from the flame and transmits a signal to a compatible flame safeguard control, which monitors for potential “runaway” scanner conditions at the start and end of every cycle to ensure system integrity.

Features

• High-sensitivity ultraviolet sensor optimized for gas and light oil flames.
• NEMA 4 rated enclosure provides superior protection against water and dust.
• Non-self-check design ideal for intermittent burner operation.
• Integrated 4-foot (122 cm) shielded flexible conduit and cable for reduced electrical interference.
• Insulated nylon coupling (1/2 inch NPT) to thermally isolate the scanner from the burner.
• Rugged construction suitable for high-temperature industrial applications.
• UL listed and FM approved for safety compliance.

Specifications

• Supply Voltage: 425 VDC +/- 25 VDC.
• Discharge Current: 0.3 mA.
• Wiring: 4 ft shielded flexible cable with two #18 AWG conductors.
• Maximum Operating Distance: 250 feet (76 meters) total wire length.
• Temperature Range: -4 degree F to +257 degree F (-20 degree C to +125 degree C).
• Mounting Connection: 1/2 inch F.N.P.T. insulated nylon coupling.
• Shipping Weight: Approximately 3 lbs (1.4 kg).
• Spectral Sensitivity: 180 to 230 nanometers (solar blind).

Applications

The UV7A4W is used in commercial and industrial burner systems where line-of-sight flame monitoring is required. It is designed to work seamlessly with Fireye MBSERIES multi-burner controls, SBSERIES single burner controls, and MBPF-100S or MB-600PF flame sensing modules. It is commonly applied in boilers, furnaces, and ovens burning natural gas, propane, or No. 2 fuel oil, particularly in systems where the burner cycles at least once every 24 hours.