Trane RTAA400 400-Ton Air-Cooled Rotary Liquid Chiller 1997 Helirotor

Trane RTAA400 400-Ton Air-Cooled Rotary Liquid Chiller 1997 Helirotor

The Trane RTAA400 is a 400-ton air-cooled rotary liquid chiller designed to provide chilled water for large-scale HVAC and industrial process cooling applications. This unit uses Trane's Helirotor rotary screw compressor technology — a hermetic, direct-drive design running at 3,600 RPM with only the rotors and load/unload mechanism as moving parts, contributing to the design's reputation for mechanical simplicity and durability. The chiller is controlled by Trane's Adaptive Control microprocessor system, which handles all unit control and safety functions.

Specifications & What's Included

• Make: Trane
• Model: RTAA400
• Full Model Number: RTAA4004XMO1BD1ABGS
• Cooling Capacity: 400 Tons
• Chiller Type: Air-Cooled Rotary Liquid (Hermetic Rotary Screw)
• Compressor Type: Helirotor — direct drive, low speed (3,600 RPM)
• Number of Compressors: 4 modulating compressors
• Refrigeration Circuits: 2 independent circuits
• Control System: Adaptive Control microprocessor (operating display, Set Point controls, auto/remote/local modes)
• Year of Manufacture: 1997
• Dimensions: 45.5 ft L × 7.5 ft W × 8.0 ft H
• Installation Type: Outdoor rooftop or ground-mount
• Includes: Operating manual and RTAA Drawing Package (240–400 ton series; schematic wiring drawings 2307-1560 through 2307-1566, field wiring 2307-1570 through 2307-1571, component location 2307-1553)

Applications

The Trane RTAA series air-cooled rotary liquid chiller is designed for large commercial and industrial cooling loads — commonly used in district cooling plants, university campuses, hospitals, data centers, large office complexes, and industrial process cooling systems. Air-cooled chillers like the RTAA400 are selected over water-cooled alternatives when a cooling tower is impractical or unavailable, since they reject heat directly to ambient air through the fin-and-tube condenser coil sections visible along the unit's length. The dual independent refrigeration circuits allow partial-load operation and provide redundancy — if one circuit requires service, the second can continue providing cooling capacity. Trane introduced the RTAA series in the early 1990s as a high-efficiency air-cooled platform for the 100–400 ton range; this 1997-built unit represents the mature generation of that design. These chillers remain in active use today at facilities that maintain older Trane mechanical systems, and parts and service support are widely available through Trane's commercial service network. A unit of this capacity is well-suited for facilities needing a cost-effective replacement or spare for an existing RTAA installation.