TMG 740-3 MOD 43-35
TMG 740-3 MOD 43-35
TMG 740-3 MOD 43-35
TMG 740-3 MOD 43-35
TMG 740-3 MOD 43-35
TMG 740-3 MOD 43-35
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TMG 740-3 MOD 43-35

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Honeywell TMG 740-3 MOD 43-35 is a combined burner control unit for supervised forced-draught gas and dual-fuel burner sequences.
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Technical specifications for TMG 740-3 MOD 43-35

  • Manufacturer:
    Honeywell
  • Part Number:
    TMG 740-3 MOD 43-35
  • Product Family:
    Honeywell Safety Systems
  • Product Type:
    Combined Burner Control Unit
  • Stock:
    1
  • Supply Voltage:
    220 to 240 VAC, 50 Hz
  • Power Consumption:
    15 VA
  • Pre-purge Time:
    40 seconds
  • Pre-ignition Time:
    4 seconds
  • Safety Time:
    5 seconds
  • Ambient Temperature:
    -20°C to +60°C
  • Degree of Protection:
    IP44
  • Weight:
    0.86 kg
  • Estimated shipping dimensions:
    10x10x10.2cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Sequence Control Flame Monitoring Service Boundary Applications

Features:

  • Sequenced burner control: Purge, ignition and fuel release proceed through one supervised program.
  • Selectable flame monitoring: The amplifier arrangement supports the documented ionization, UV or IR detector path.
  • Visible diagnostics: Program position and flame-signal indication narrow the point of an interrupted start.
TMG 740-3 MOD 43-35 is the exact MOD 43-35 program variant of the Honeywell/Resideo TMG 740-3 burner-control family.

Its practical value is the coordinated relationship between damper proving, ignition timing, valve release and continuous flame supervision.

The MOD suffix remains a functional identity because another TMG 740-3 timing program may fit the same style of base without matching the burner sequence.

Apter Power can help confirm Honeywell TMG 740-3 MOD 43-35 program identity, base wiring, flame detector and supplied scope before quotation.
TMG 740-3 MOD 43-35 Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Air-first start: The program proves the required airflow before fuel release.
  • Timed ignition: Pre-ignition and safety intervals create a defined window for flame establishment.
  • Valve supervision: Fuel outputs follow the selected program rather than independent timer settings.
  • Lockout boundary: A failed proving or flame condition interrupts the sequence and requires fault correction.
  • Detector selection: The configured amplifier path must match the installed ionization, UV or IR sensor.
  • Signal visibility: The front indication helps distinguish weak flame signal from another start permissive.
  • Stray-light check: The control evaluates an unwanted signal when flame should be absent.
  • Wiring continuity: Detector lead routing and grounding remain part of reliable supervision.
  • Exact MOD program: Timing suffixes are not accepted as automatic equivalents.
  • Base verification: Terminal functions are compared with the burner diagram before insertion.
  • Controlled restart: Air, ignition, flame and valve actions are observed in sequence.
  • Fault-first diagnosis: The program indicator is read before resetting or changing a component.
  • Industrial boilers: Supervises a defined gas or dual-fuel burner start and running flame.
  • Process heaters: Coordinates purge and ignition where safe fuel admission is essential.
  • Direct-fired air systems: Links airflow proving with the burner release sequence.
  • Legacy combustion service: Restores an installation that is documented for the MOD 43-35 program.
Description
TMG 740-3 MOD 43-35 coordinates the purge, ignition, fuel-valve and flame-supervision sequence of compatible forced-draught gas or dual-fuel burners. Its control program keeps air-proving and flame detection inside one defined safety cycle instead of leaving those functions to separate timers.

TMG 740-3 MOD 43-35 supports ionization, ultraviolet or infrared flame monitoring through its selectable amplifier arrangement. A visible program indicator and flame-signal display help service personnel identify the point at which a start is interrupted without replacing components by guesswork.
Alternative Names
08218U TMG740-3MOD43-35
Technical notes
Match the TMG 740-3 MOD 43-35 program version, base wiring, flame-detector selection and burner timing before exchange. A mechanically fitting control with another MOD suffix can use different sequence times. Verify air-proving and flame signal through a controlled start; stop if the valve sequence or detector response differs from the burner record.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
A TMG 740-3 MOD 43-35 burner stops before ignition. What should maintenance check first?
Read the program position, then verify the air-pressure switch, damper feedback and start permissives. Repeated resetting before the failed proving condition is found can hide the actual interruption point.
How should the flame detector be matched to TMG 740-3 MOD 43-35?
Confirm the installed ionization, UV or IR detector and set the corresponding amplifier selection. A strong-looking signal from the wrong circuit does not establish a valid safety function.
Can another TMG 740-3 MOD suffix replace TMG 740-3 MOD 43-35?
Do not assume so. The MOD suffix identifies a timing program, so compare every purge, ignition, valve and post-purge interval with the burner documentation before substitution.
TMG 740-3 MOD 43-35 locks out during the safety time. What does that imply?
The required flame signal was not accepted within the programmed ignition window. Inspect ignition, fuel admission, detector signal and grounding before considering the control itself faulty.
What should be recorded before removing TMG 740-3 MOD 43-35?
Record the complete model, base terminal wiring, detector type and selector, damper feedback, air-switch circuit, sequence indicator position and the fault condition that triggered service.
When should commissioning of TMG 740-3 MOD 43-35 be stopped?
Stop if airflow is not proven, fuel valves operate out of sequence, flame appears without a valid signal, or the installed timing differs from the approved burner record.

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