Product Details

The Fireye NXVFD756A is a high-power factory assembled variable frequency drive built for the Fireye Nexus combustion control platform, designed to drive large combustion blower motors on heavy-duty industrial burners. This variable frequency drive accepts analog and bus modulation commands from PPC4000, PPC6000 and NX6300 parallel positioning controllers, continuously adjusting blower airflow to match fuel delivery and sustain the optimal fuel-air ratio across the full firing range. As a reliable large burner blower VFD, it is enclosed within a rugged NEMA 12 cabinet, pre-fitted with fused line disconnect, motor overload protection and a backlit local LCD keypad for parameter programming, live status viewing and fault troubleshooting. This Nexus combustion speed controller supports high-resolution fan modulation, reduces idle energy consumption and helps lower NOx and CO emissions for large boilers and process heaters; it is stocked as genuine replacement spare part for Fireye Nexus burner management systems.

Basic Parameters

Brand: Fireye

Model: NXVFD756A

Type: High power combustion blower variable frequency drive

Rated power: 75 HP

Rated continuous current: 83 A

Power supply: 600 VAC, three-phase, 50 / 60 Hz

Enclosure rating: NEMA 12

Built-in components: Fused disconnect switch, motor overload relay, backlit LCD display and programming keypad

Signal interface: Analog speed setpoint, speed feedback, Nexus control bus compatible

Compatible master controllers: PPC4000, PPC6000, NX6300

Suitable load: Large combustion air blower motor

Certifications: UL listed, CE compliant

Product type: Original Fireye Nexus high horsepower blower inverter

Supported Functions

This VFD follows firing demand signals sent by the host combustion controller and dynamically modulates blower motor speed. It provides comprehensive motor protection including overload, overvoltage, undervoltage, phase loss and short-circuit protection. Operators can view running frequency, motor current, cumulative runtime and fault logs via the local keypad, and tune acceleration and deceleration ramps to prevent airflow surges during ignition, load changes and shutdown. It integrates seamlessly with PXMS pressure transmitters and oxygen trim probes to deliver closed-loop energy-efficient combustion control.

Core Functions

The heavy-duty NEMA 12 cabinet offers robust defence against dust, moisture and vibration present in boiler house environments. Pre-assembled internal hardware minimizes on-site wiring and commissioning time for large burner retrofits. Its high torque and fine speed regulation support precise air-fuel tuning for low-emission operation, and it serves as direct drop‑in substitution for existing NXVFD756A variable frequency drives.

Hardware Specifications & Environmental Features

Mounting: Floor or panel cabinet mounting

Operating temperature: 0 °C to +40 °C

Storage temperature: -40 °C to +85 °C

Relative humidity: 5% – 90%, non‑condensing

Protection class: NEMA 12

Housing: Heavy-duty painted metal cabinet

Condition: Original new Fireye variable frequency drive

Industry Applications: Applied in legacy petrochemical distributed control, old paper making production automation, material handling conveyor lines, packaging and textile machinery, water treatment remote signal collection and large conveyor remote I/O control racks.

Note: Confirm three-phase 600V power supply, blower motor full load current rating and Nexus controller signal compatibility before ordering; this high-power drive is purpose-built for combustion blowers and needs engineering evaluation for general motor applications.

This is from our current stock.

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