Description
Product Introduction & Engineering Value
A nuisance flame failure on a fired heater is never just an inconvenience—it can shut down a boiler, dryer, or process furnace. The C7012E1104 addresses that problem by continuously checking its own UV sensing path through an internal shutter mechanism.
It senses UV radiation from gas, oil, coal, and other carbon-fuel flames, then converts the signal for use with compatible Honeywell flame amplifiers. The detector is field-serviceable: its viewing window, UV sensing tube, self-checking coil, and shutter can be replaced individually.
Technical Specifications
- Detection principle: Ultraviolet radiation from hydrocarbon combustion.
- Self-checking method: Dynamic Self-Check shutter mechanism.
- Supply voltage: 110–120 VAC, 50/60 Hz.
- Power consumption: 7.0 W maximum.
- Mounting connection: 3/4 in. NPT.
- Leadwires: Six color-coded NEC Class 1 conductors, 96 in. / 2.4 m long.
- Ambient temperature: -20°F to +175°F (-29°C to +79°C).
- Enclosure: Cast-aluminum housing, NEMA 4 / IP66 protection.
- Dimensions: 5-1/4 in. diameter including flange by 7-7/32 in. long; approximately 133 mm by 183 mm.
- Weight: 4.25 lb / 1.9 kg.
- Compatible flame amplifiers: R7247C and R7847C.
- Compatible control family: Honeywell RM7800-series relay modules and related flame-safeguard controls.
Field Application & The “Trench” Experience
During a fall turnaround, a refinery boiler crew replaced a C7012E1104 that had become intermittent after years of radiant heat exposure. The old scanner passed a bench check but failed to produce a stable flame signal during purge and light-off. Rather than risk another unplanned trip, the team replaced the scanner, verified sight-pipe alignment, cleaned the quartz window, and confirmed a strong flame signal through the R7847C amplifier before returning the burner to service.
Typical installations include:
- Packaged industrial boiler burner flame supervision
- Process heater and reformer burner management systems
- Thermal oxidizer and afterburner flame monitoring
- Direct-fired dryers and ovens using natural gas, propane, or fuel oil
C7012E1104
C7012E1104
Transparency SOP: QA & Testing
- Identity verification: Confirm Honeywell C7012E1104 marking, 120 VAC rating, 3/4 in. NPT mounting, and self-check configuration.
- Visual inspection: Inspect the cast housing, viewing window, leadwire insulation, connector area, and mounting flange for cracks, heat damage, or corrosion.
- Electrical testing: Check leadwire continuity and insulation; verify no shorts between conductors or to the housing.
- Functional check: Apply the rated 120 VAC supply and confirm proper self-check shutter operation where test equipment permits.
- UV response verification: Validate detector response with appropriate Honeywell flame-safeguard amplifier and test apparatus; do not rely on visual inspection alone.
- Packaging: Ship in ESD-safe, impact-protected packaging to preserve the quartz viewing window and sensor assembly.
The Veteran’s Tech Trap Guide
⚠️ This is not a generic UV scanner. The C7012E1104 must be used with Dynamic Self-Check flame-safeguard controls and amplifiers—typically R7247C or R7847C. Pairing it with the wrong amplifier can produce unreliable flame signal readings or nuisance shutdowns.
⚠️ The UV tube is the usual failure point. Replacement UV sensing tubes are scarce, and a failed tube generally makes scanner repair impractical; in that case, replacement of the complete detector is the sound engineering decision.
PRO TIP: Before removing the old unit, record the sight-pipe orientation, purge-air arrangement, amplifier flame-signal reading, and leadwire color-to-terminal mapping. A clean sight pipe and correct sighting angle often prevent a “bad scanner” diagnosis that is actually a viewing-path problem.
⚠️ Check the replacement path. Industry references identify the C7012E1104 as obsolete, with C7012E1112 or C7061A1053 plus an R7861A1026 amplifier cited as newer replacement routes. Confirm the full amplifier/control chain before committing to a substitution.
Dynamic FAQ
What does the C7012E1104 detect?
It detects ultraviolet radiation emitted by combustion of carbon-containing fuels, including natural gas, LP gas, oil, and coal.
Which Honeywell amplifiers work with it?
It is intended for use with Honeywell Dynamic Self-Check flame amplifiers, specifically R7247C and R7847C.
Is it self-checking?
Yes. The E-version uses a dynamic self-checking shutter and coil arrangement for continuous flame-safeguard supervision.
Can it be repaired?
The viewing window, UV tube, self-checking coil, and shutter are field-replaceable in principle, but UV tube availability is limited; a failed tube often makes complete replacement more practical.
Is C7012E1104 still manufactured?
It is widely listed as obsolete. Replacement options cited in the market include C7012E1112 or the newer C7061A1053 with R7861A1026 amplifier, subject to verification against the existing burner-management system.
What warranty is provided?
New Surplus and refurbished C7012E1104 detectors include a stated replacement warranty; the exact term depends on condition grade and is documented on the sales order and packing paperwork.
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