RM7840G1014 Honeywell Burner Control – Full Programming, 120V, UL

Product Introduction

• Honeywell RM7840G1014 – full-featured burner programming control.
• For 120V AC systems, 50/60 Hz.
• UL recognized and CSA certified for safety.
• Includes preignition, purge, and flame monitoring.

• Key Capabilities
  • Full burner sequence with Proven logic (LHL-LF).
  • Selectable pilot flame establish time: 4 or 10 sec.
  • Main flame timing: 10, 15, 30 sec, or intermittent.
  • Post-purge fixed at 15 sec.
  • Early spark termination (5 sec) for safety.
• Physical & Environment
  • Width: 127 mm, Height: 127 mm.
  • Depth: 133 mm (with Q7800A subbase) / 155 mm (with Q7800B).
  • Weight: 0.8 kg (1 lb 13 oz).
  • Operating temp: -40°C to +60°C.
  • Vibration rating: 0.5 G.
• Required Parts (sold separately)
  • Q7800A or Q7800B wiring subbase.
  • Flame amplifier (R7847, R7848, R7849, etc.).
  • ST7800A purge timer card.
• Approvals
  • UL Component Recognized (File MP268).
  • CSA Certified (File LR95329-3).
  • FM Approved (Report OX4A5.AF).
  • FCC Class B (emissions).
  • CSD-1 and Swiss RE acceptable.

Expert Review & Manager’s Insight

• Field Engineer: “Proven reliable in thousands of boilers. The 5-sec early spark termination is a standout safety feature.”
• Manager’s Note: “RM7840G1014 cuts installation time with plug-in cards. We recommend stocking the ST7800A timer for fast swaps.”
• Quality Check: “Honeywell’s vibration tolerance (0.5G) ensures stable operation near compressors.”

Applications & Compatible Equipment

• Industrial burners – gas/oil fired boilers, furnaces.
• Commercial HVAC – rooftop units, make-up air handlers.
• Process heaters – refineries, chemical plants.
• Power generation – small cogeneration systems.
• Works with Honeywell flame amplifiers (R7847/R7848 series).

Comparison with Similar Models

• RM7838A1026 – similar but 24V version, no preignition.
• RM7895A1015 – advanced with self-check, higher cost.
• RM7800L1043 – for low-fire applications only.

Frequently Asked Questions (FAQ)

• Q: What voltage does this burner control accept?
• A: 120 Vac (+10%, -15%) only.
• Q: Is the purge timer included?
• A: No, you need the ST7800A purge timer card.
• Q: Can I use it with a 50 Hz supply?
• A: Yes, it works with 50 or 60 Hz (±10%).
• Q: How do I select pilot flame time?
• A: Via DIP switch on the board – 4 or 10 sec options.
• Q: What happens if flame signal is lost?
• A: Control locks out, requires manual reset.

Advanced Selection & Experience Tips

• Warranty: 12 months against defects. Keep original invoice.
• Shipping: Same-day dispatch (order before 2 PM GMT+8).
• Carriers: FedEx, UPS, DHL – tracking in 12 hours.
• Spare parts: Always have a spare ST7800A timer card.
• Installation note: Use shielded cable for flame amplifier to avoid noise.
• First-time setup: Run a full cycle test before connecting load.

Questions? Email sales@powergearx.com or +86 18030005825 (WhatsApp).

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