Description
Product Introduction
The Honeywell MT4003C is a MT4000 Series damper actuator designed specifically for small to medium-sized commercial and industrial burners. It functions as a servo motor to precisely position the combustion air damper or butterfly valve, modulating the air flow based on signals from the burner controller.
This model is configured for 2-stage (high/low fire) control and is directly compatible with common controllers like the MMI, DMG, and LGB series . It accepts a 230 VAC supply and provides a torque rating of up to 3.0 Nm depending on the configured runtime . The robust, waterproof synthetic housing and mechanical cycle rating of over 250,000 operations make it a field-proven workhorse for combustion management systems .
Frequently Asked Questions
Q: Does the MT4003C support hot-swapping?
Honestly, no. This is an electromechanical device connected to line voltage (230 VAC). You must disconnect power at the source before wiring or swapping this unit. Attempting to connect or disconnect it with power applied risks personal injury and immediate destruction of the actuator’s internal electronics or motor.
Q: Is this model obsolete? Are there any direct replacements?
The MT4000 series is a mature product line. While the core MT4003C function is still widely used, you should verify the specific suffix (e.g., -1005, -2003) against your current part number. Honeywell’s newer lines like the M Series or BurnerPro may offer form/fit/function replacements, but pay close attention to the mounting dimensions and linkage kit compatibility. Verify the OEM datasheet for your specific application.
Q: Will I lose my burner program or settings during replacement?
No. The MT4003C is a “dumb” actuator; it contains no memory or programmable logic. It simply moves to a position based on the 230V control signal from your burner management system. Your program and settings reside in the main controller (e.g., EC7800, MMI). You will, however, need to mechanically re-set the high and low fire limit stops after installation.
Q: Are these units factory-new or refurbished?
The units we supply are New Original or New Surplus stock. This means they are authentic Honeywell products, factory-sealed, and never used in the field. They have not been refurbished or repaired. We follow strict inbound inspection to verify seal integrity and proper labeling.
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