Unmatched Reliability

• 64% fewer parts than a comparable capacity reciprocating compressor. Single orbiting assembly eliminates valves, rods and pistons.
• Patented 3-dimensional compliance. Orbiting assembly shifts to allow liquid refrigerant and dirt to pass without damaging the compressor.
• Smooth operation like a centrifugal compressor, Low torque variation extends motor life. Minimal vibration reduces wear.
• Solid mount with no internal suspension to wear out.
• Exclusive electronic compressor motor protection. Microprocessor precisely monitors suction, discharge and motor temperatures and motor current for more reliable operation.
• Cool suction gas motor cooling for long motor life.
• Integral inlet dirt separator removes contaminants.

System Extreme Environmental Test (SEET)

The Trane SEET program has proven the 3-D scroll compressor to be reliable in even the most severe operating conditions. The SEET test simulates five years of actual operation in the most severe application — the split system heat pump. Cooling tests with simulated outdoor temperatures of 135 F and heating tests with outdoor temperatures as low as -20 F are completed. The compressors are run at minimum and maximum voltages during all tests and cycled on and off rapidly. During the entire test cycle there is a momentary 1/10 second power interruption every 20 minutes. Despite this and other extreme simulations, no Trane 3-D scroll compressor has ever failed during the SEET test.

Maximum Efficiency

• Patented 3-dimensional compliance. Tip seal allows axial contact for maximum efficiency.
• Single rotating assembly minimizes friction and mechanical losses.
• Rolling element bearings for higher efficiency from reduced friction.
• Suction gas cooled motor for higher motor efficiency.
• No suction or discharge valves for improved efficiency compared to a reciprocating compressor.

How the Trane 3-D™ Scroll Compressor Works General

A 3-D compressor has two scrolls. The top scroll is fixed and the bottom scroll orbits. Each scroll has walls in a spiral shape that intermesh.

Inlet — First Orbit

As the bottom scroll orbits, two refrigerant gas pockets are formed and enclosed.

Compression — Second Orbit

The refrigerant gas is compressed as the volume is reduced closer to the center of the scroll.

Discharge — Third Orbit

The gas is compressed further and discharged through a small port in the center of the fixed scroll.