Compressor description by Ralkin

2DESH-3: High-Temperature Semi-Hermetic Compressor Specification

General Description

The 2DESH-3 is part of the Bitzer ECOLINE H series, a creative advancement of the proven, robust, and powerful semi-hermetic reciprocating compressor range. This series combines high efficiency, smooth running, and high reliability, specifically designed for demanding conditions. The H series models are specialists equipped with an additionally reinforced drive gear and lubrication system, making them ideal for high-temperature heat pumps and transport applications such as railway air conditioning. Key features include a new valve plate design with low rear expansion, efficient broadband motors, and the CRII capacity control system. The series is downward compatible, replacing predecessors with the same connection sizes.

Model Identification (2DESH-3)

Based on the standard ECOLINE H naming convention (e.g., 4BESH-9Y), the model components are decoded as follows:

• 2: Number of cylinders (2-cylinder configuration)
• DE: Identification for bore x stroke
• S: ECOLINE series identifier
• H: Special design for transport applications and high-temperature heat pumps (reinforced drive gear and lubrication system)
• 3: Motor size
• (3): Suffix indicating the specific oil charge type or version (typically aligns with the Y - Polyolester oil - designation found in standard listings like the 2DESH-3Y)

Technical Features & Specifications

• Displacement at 50 Hz: 13.4 m³/h
• Heating Capacity (Qh): 11.07 kW (rated at R515B with evaporating temperature tₑ = 30°C and condensing temperature t꜀ = 85°C)
• Oil Charge: 1.5 dm³
• Weight: 77 kg
• Electrical Data (Max. Operating Current):
  • Delta/Y Motor: 15.0 A / 8.6 A
• Primary Refrigerants: Optimized for H-Series High Temp refrigerants including R1234ze(E), R515B, and R245fa. Also compatible with a wide range including R1234yf, R513A, R134a, etc.
• Oil Type: Polyolester oil (BSE85K for high-temp design applications)