Honeywell C7012F1052 Ultraviolet Flame Detector (Purple Peeper)

Product Description

C7012F1052 is a solid‑state self‑checking ultraviolet flame detector (Purple Peeper) manufactured by Honeywell for industrial burner and boiler burner‑management‑systems. It senses ultraviolet radiation generated by combustion of natural gas, LP gas and fuel oil. This model features built‑in dynamic self‑test function, explosion‑proof housing rated for Class I hazardous locations, quartz viewing window rated for 100 psi. It connects to Honeywell burner safety controllers, provides real‑time flame presence signal for furnace safety interlock, widely deployed on industrial boilers, process heaters and thermal equipment.

Product Functions

• Detect UV‑band radiation emitted by gas or oil combustion flame, distinguish real flame from visible‑light interference.
• Integrated automatic dynamic self‑check shutter mechanism to verify sensor health during continuous burner operation.
• Output flame‑present / flame‑loss signal to burner control unit for fuel shut‑off interlock upon flame‑out event.
• Explosion‑proof enclosure design for installation inside hazardous classified area near combustion chamber.
• Quartz pressure‑resistant observation window adapts to furnace positive‑pressure working conditions.
• Support multi‑detector parallel wiring for harsh sighting conditions to reduce nuisance trips.
• Color‑coded lead wires and threaded conduit fitting for convenient field wiring installation.
• UV sensing tube and quartz window are field‑replaceable spare components for on‑site maintenance.

Application Scenarios

• Industrial gas‑fired and oil‑fired boiler BMS burner management safety supervision.
• Petrochemical plant process heater, furnace and thermal cracking unit flame monitoring loop.
• Refinery, oil‑gas site combustion equipment installed in hazardous classified locations.
• Power plant auxiliary boiler, waste‑heat boiler and incinerator flame safety detection.
• Retrofit and spare‑part replacement for existing Honeywell burner control installations.

Common Problems & Troubleshooting

• Nuisance flame‑out trip with normal combustion: Inspect quartz window for soot, dust and carbon deposit contamination; verify detector aiming angle accurately targets burner flame zone.
• Flame signal weak, unstable reading: Check UV sensor tube aging degradation; inspect wiring insulation and terminal crimp condition; avoid excessive high ambient temperature exceeding specification limit.
• Self‑check fault alarm triggered: Verify shutter mechanical movement of internal self‑check assembly; check mounting orientation reference alignment; replace detector if shutter mechanism stuck.
• No flame signal output even flame exists: Check wiring open‑circuit / short‑circuit fault; confirm matched burner amplifier controller; inspect burnout of internal UV sensing tube.
• Window damage or leakage: Replace cracked quartz window; ensure proper gasket sealing to prevent furnace gas leakage into detector housing.
• Intermittent signal fluctuation: Check conduit wiring shielding grounding; eliminate high‑frequency EMI interference nearby burner wiring; inspect vibration‑induced loose terminals.
• High‑temperature fault: Ensure detector installation position away from direct furnace thermal radiation; keep operating ambient temperature within‑29℃ ~ +79℃ range.