Honeywell Satronic TMG740-3 Mod.43-35 Gas Burner Control Box 220V

Overview
The Honeywell TMG740-3 is a sequence control box designed for medium to high-performance forced-draught and dual-fuel oil or gas burners operating in intermittent mode. It supports single-stage or two-stage operation, includes flame supervision (via ionisation probe, UV sensor or IR flicker detector), and offers monitored air-proving and damper/valve interlocks for safe combustion system start-up and shutdown.

Key Features

• Supply voltage 220-240 V AC (50 Hz) version (Mod. 43-35)

• Controls burners with pilot valve, main valve(s) and provides flame supervision and lock-out diagnostics

• Supports ionisation, UV and IR flame detection technologies

• Monitored air-proving switch, damper position feedback for safe start sequence

• Manual reset button with signal lamp for lock-out indication

• Compact control box for mounting on wiring base

• Approved to relevant European burner safety standards

Main Benefits

• Ensures safe, reliable burner start sequence with pre-purge, ignition, flame supervision and post-purge as needed

• Flexible use with gas, oil or dual fuel burners in industrial or commercial installations

• Integrated diagnostics and signal indication reduce maintenance time and increase system uptime

• Compatible with many flame detectors and wiring bases for retrofit or new install

• Established brand and long availability of spares and support

Technical Highlights

• Supply voltage: 220-240 V AC (-15 % / +10 %) at 50 Hz

• Fuse rating: 10 A fast or 6 A slow

• Power consumption approx. 15 VA

• Output terminals max current: 4 A per terminal, total up to 6 A

• Ambient temperature range: -20 °C to +60 °C

• Mounting attitude: any

• Protection class: IP44

• Weight (incl. base) approx. 1.1 kg

Installation & Safety Notes

• Installation must be performed by qualified personnel in accordance with local regulations for combustion systems and electrical wiring.

• Ensure correct wiring base is used and flame detector type matches the amplifier settings.

• Confirm correct air-proving switch and damper feedback wiring to prevent unsafe burner start.

• Ensure wiring length for flame detector remains within manufacturer spec to maintain sensitivity.

• Check lock-out diagnostics and reset lamp operation before commissioning.

Applications

• Industrial/commercial oil or gas burners in forced-draught systems

• Dual-fuel burner installations requiring safety sequence control

• Retrofitting burner control boxes in existing combustion systems

• Compliance with EN 298 / burner safety regulations