Compressor description by Ralkin

The Copeland D6TJ series represents two-stage accessible hermetic motor-compressors designed for robust performance. These compressors are lubricated by an oil pump requiring an oil-pressure control and feature motor cooling via suction gas. The specific "X" designation in the model indicates the use of POE ester oil.

Model Identification

• D: Compressor Description = DWM Copeland fabrication
• 6: Number of cylinders
• T: Compressor Variation = Two-stage compressor
• J: Cylinder bore / Stroke variation
• 250: Compressor motor rating
• X: Oil Charge = Ester oil (POE)

Technical Features:

• Design: Two-stage accessible hermetic motor-compressor.
• Lubrication: Pump lubrication system necessitating an oil-pressure control.
• Cooling: Motor is cooled by suction gas.
• Oil Type: Contains POE ester oil (indicated by the "X" in the model number).
• Safety: Includes an internal pressure relief valve.

Specifications & Data:

• Configuration: Two-Stage with Subcooler (Standard "X" models generally imply a specific configuration, often aligned with SUB specs in catalogs, but strictly following the D6TJ-250X entry which shares data with the D6TJ-2500/SUB series in terms of core mechanics). Note: Based on the provided table, D6TJ-250X shares displacement and physical specs with D6TJ-2500 and D6TJ-250X SUB.
• Number of Cylinders: 6 total (4 Low Pressure / 2 High Pressure)
• Bore x Stroke: 74.6 mm x 55.6 mm
• Theoretical Displacement (50Hz): 84.7 m³/h
• Displacement (60Hz): 102 m³/h (Derived from D6TJ*-2500 table column "Displacement (m³/h)")
• High-Pressure Volume (50Hz / 60Hz): 42.4 / 51.1 m³/h
• Oil Charge: 7.4 Liters
• Weight (Net / Gross): 272 kg / 277 kg (For D6TJ-2500/D6TJ-250X) or 277 kg / 277 kg (For D6TJ-2500 SUB/D6TJ-250X SUB). The base D6TJ-250X typically aligns with the standard non-SUB weight unless specified, but the table lists D6TJ-250X with 277kg net. Let's stick to the specific table entry for D6TJ-250X which lists Net 277kg. -> Correction: Table 3 lists D6TJ-250X Net Weight as 277 kg. Table 4 lists D6TJ*-2500 (No Subcooler) Net as 242kg. This discrepancy suggests the "X" suffix in Table 3 might correspond to the SUB variant or a different configuration. However, looking at D6TA-1500 vs 150X, 150X is 254kg (SUB weight) while 1500 is 249kg. It is highly likely D6TJ-250X refers to the Subcooler version in this specific dataset context given the weight difference and the "X" often denoting specific oil/type configurations that bundle with subcoolers in some catalogs. We will provide the data for the D6TJ-250X row from Table 3: Weight 277kg, Oil 7.4L.
• Suction Connection (Sweat): 1 5/8"
• Discharge Connection (Sweat): 1 3/8"
• Max Operating Current (50Hz): 40.2 A
• Locked Rotor Current (50Hz): 203 A