ABB ACH550-01-05A4-4 HVAC Variable Frequency Drive for Commercial and Industrial Applications

Product Overview

The ABB ACH550-01-05A4-4 is a high-performance variable frequency drive (VFD) specifically designed for HVAC (heating, ventilation, and air conditioning) applications. Rated at 2.2 kW and 5.4 A output current, this 3-phase drive operates from a 380-480 V AC power supply at 50/60 Hz. The ACH550 series is renowned for its built-in HVAC features, energy-saving capabilities, and ease of commissioning. This model features an IP54 enclosure, making it suitable for wall-mounted installation in environments where dust and moisture resistance are required. The drive can be used in both new installations and retrofit projects.

Key Features of ACH550-01-05A4-4

The ACH550-01-05A4-4 includes built-in PID controllers for pressure, flow, or temperature regulation without requiring external controllers. HVAC application macros simplify configuration for common applications such as fans, pumps, and compressors. The drive supports multiple fieldbus protocols including BACnet, Modbus, and LonWorks, enabling seamless integration into building automation systems. It features harmonic mitigation technology to reduce line current distortion and comply with IEEE 519 standards. The drive includes an integrated control panel with a backlit LCD display for local programming, monitoring, and diagnostics.

The drive includes an embedded EMC filter for compliance with electromagnetic compatibility requirements. It has a switching frequency range selectable from 1 kHz to 8 kHz or 12 kHz depending on load, balancing acoustic noise and efficiency. The ACH550-01-05A4-4 is housed in an IP54 enclosure, providing protection against dust ingress and water splashes, suitable for wall-mounted installation in mechanical rooms or on equipment. The drive includes standard I/O: 6 digital inputs, 2 analog inputs, 1 digital output, 1 analog output, and 2 relay outputs. It supports safety functions such as Safe Torque Off (STO) as per EN 61800-5-2. The drive is CE and UL certified.

Technical Specifications

• Manufacturer: ABB

• Part Number: ACH550-01-05A4-4 (also with suffix +B055 for IP54)

• Series: ACH550

• Product Type: HVAC Variable Frequency Drive

• Output Power: 2.2 kW (3 HP) at 400V

• Output Current: 5.4 A

• Input Voltage: 380-480 V AC ±10%, 3-phase, 50/60 Hz

• Enclosure Class: IP54 (wall-mount)

• Frame Size: R1

• Built-in Features: PID control, HVAC macros, harmonic mitigation

• Fieldbus Protocols: BACnet, Modbus, LonWorks

• I/O: 6 DI, 2 AI, 1 DO, 1 AO, 2 relay outputs

• Safe Torque Off (STO): Yes

• EMC Filter: Built-in

• Switching Frequency: 1 to 12 kHz selectable

• Operating Temperature: -10 to +40 °C (up to 50 °C with derating)

• Dimensions (H x W x D): 222 mm x 234 mm x 461 mm

• Weight: Approximately 8 kg

• Certifications: CE, UL, cUL

Functional Description

The ACH550-01-05A4-4 VFD controls the speed of 3-phase induction motors by varying the frequency and voltage supplied to the motor. The built-in PID controller directly reads sensor feedback and adjusts motor speed to maintain setpoint, eliminating external controllers. HVAC macros pre-configure the drive for fan and pump applications, including settings for auto-restart, fire mode, and energy optimization. The fieldbus interfaces allow the drive to be integrated into a building automation system, where a central controller can read status and send speed commands. The IP54 enclosure allows installation in areas with condensation or dust without an additional protective cabinet.

Applications

The ACH550-01-05A4-4 is used in commercial and industrial HVAC systems, including supply/exhaust fans, chilled water pumps, condenser fans, cooling tower fans, and variable air volume systems. It is suitable for retrofitting constant-speed motors to variable speed for energy savings, typically reducing fan and pump energy consumption by 30-50%.