HITACHI Scroll Type Refrigeration Compressor E405DHD-36D2G E405DHD-38D2G E405DHD-42D2G

The E-Series DHD is Hitachi's DC inverter scroll compressor product line optimized for R410A refrigerant, covering four capacity grades: E405DHD, E655DHD/E656DHD, E705DHD/E706DHD, and E856DHD. With a complete power range of 6–14 HP and a wide frequency modulation range of 60–180 Hz as its core features, this series is the core power choice for residential and commercial air conditioning and VRF (Variable Refrigerant Flow) systems.

Test condition: 50Hz, R410A refrigerant.

Note: E656/E706 are short oil return versions, designed for systems with long piping and difficult oil return. For standard piping, select E655/E705.

Feature: The E-Series DHD adopts DC inverter scroll technology, equipped with core technologies including a high-efficiency concentrated winding BLDC motor, optimized asymmetric scroll profiles, high-reliability bearings, and a high-pressure shell design. The entire series features a three-phase power supply of 380-415V/50Hz (compatible with 440V/60Hz) and a frequency range of 60–180 Hz. The compressor features a compact structure—the E405DHD series stands at only 383 mm in height and weighs 28–29 kg.

Advantage: This series is centered on two core advantages: wide-frequency modulation and high energy efficiency. The COP of E405DHD-36D2G reaches 3.20, while E655DHD-65D2G achieves 3.25. The wide frequency range of 60–180 Hz enables the compressor to maintain highly efficient operation under varying loads, with excellent part-load efficiency. The operating noise of E405DHD-36D2G is as low as 66 dB. The short oil return versions (E656/E706) are specifically designed for long-piping systems, ensuring reliable oil return to the compressor through an optimized internal oil circuit.

Benefit: For VRF and commercial air conditioning system manufacturers, the wide-frequency modulation capability of the E-Series DHD enables the system to precisely match building load variations, maintain high energy efficiency during part-load periods, and significantly reduce annual operating electricity costs. For contractors, the short oil return version solves the oil return challenge of long-piping systems and reduces system design risk. For end users, Hitachi's original factory quality and long-life design ensure long-term reliable operation and minimize downtime losses.

Selection Mnemonic: For 6 HP, choose E405DHD-36D2G; for 10 HP, choose E655/E656; for 12 HP, choose E705/E706; for 14 HP, choose E856. For standard piping, select E655/E705; for long piping, select E656/E706.

Q1: What are the cooling capacity and COP of E405DHD-36D2G?

E405DHD-36D2G is a 6 HP DC inverter scroll compressor with a displacement of 36 cm³/rev, cooling capacity of 11.8 kW, input power of 3,665 W, COP of 3.20, frequency range of 60–180 Hz, and noise level of 66 dB.

Q2: What is the difference between E655DHD-65D2G and E656DHD-65D2G?

Both share the same displacement (65 cm³/rev), power rating (10 HP), cooling capacity (21.5 kW), and COP (3.25). E656 is the short oil return version, specifically designed for systems with long piping and difficult oil return.

Q3: What are the technical specifications of E856DHD-80D2G?