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Series R™ Helical Rotary Screw Chillers

Models RTWD and RTHD

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Overview

Proven performance, modern versatility.

Series R™ helical rotary screw chillers deliver precise, reliable thermal management with low-GWP refrigerants in a compact, easy-to-install design for a wide range of applications.

  • Capacity Range: 80-400 tons; 600-5,000 MBH
  • Refrigerant: R-513A and R-515B
  • Compressor Type: Helical Rotary Screw
  • Controller: Symbio® 800-Unit Controller 

  1. Versatile Performance for Various Demands

    Series R helical rotary screw chillers are ideal for commercial applications requiring precise temperature control. Their wide operating temperature range, electronic expansion valve, and short anti-recycle timers provide flexibility for nearly any high-performance cooling and heating system.

  2. Low-GWP Refrigerants and Advanced Controls

    Series R helical rotary screw chillers help building owners meet sustainability goals with low-GWP refrigerants like R-513A for cooling and R-515B for heating, reducing GWP by 55% compared to R-134a. The Symbio® 800 equipment controller seamlessly integrates with building automation systems, performing energy efficiency and chiller performance analyses to deliver enhancement insights.

  3. A Reliable, Proven Solution

    Series R helical rotary screw chillers deliver high reliability and enhanced energy efficiency due to their direct-drive compressor design that uses fewer moving parts than gear compressors.

  4. INSTALL OUTLINE - SVG

    Compact Design for Easy Installation

    Chiller replacement can be faster, cheaper and less disruptive due to the compact size of the Series R helical rotary screw chiller, which fits into most existing mechanical rooms without requiring additional floor space or wall tear-outs. Units can pass through a standard double door opening, and both single- and dual-point power connections can take advantage of existing wiring.

Product Information

  • As a heat pump chiller, the RTWD features expanded heating capabilities of up to 165°F (74°C) for boiler replacement in a wide range of applications.
  • RTHD can be configured to produce leaving evaporator solution temperatures as low as 5°F (-15°C) for industrial process cooling applications.
  • The Symbio® 800 equipment controller serves as the launch point to connect to an array of Trane® building systems and services.
  • Series R chillers operate with R-513A refrigerant for cooling and R-515B for heating.

  1. RTHD (175-400 tons; 2,100-5,000 MBH)

    • R-513A refrigerant utilized for all applications.
    • The RTHD chiller can be configured to produce leaving evaporator solution temperatures as low as 5°F (-15°C) for industrial process cooling applications.
    • The RTHD chiller can generate condenser water temperatures as high as 111°F (44°C).
    • Enhance chiller efficiency at reduced loads with the fully integrated variable-speed drive option.

  2. RTWD (80-250 tons; 600-3,000 MBH)

    • As a heat pump chiller, the RTWD features expanded heating capabilities of up to 165°F (74°C) for boiler replacement in a wider range of applications with refrigerant R-515B.
    • R-513A refrigerant utilized for both comfort cooling and low-temperature industrial applications, with leaving evaporator solution temperatures as low as 10°F (-12°C).
    • For sound-sensitive applications, an optional acoustic treatment can be factory- or field-installed on the compressors.

Series R™ Helical Rotary Screw Chillers

Two proven workhorses known for their reliability, Trane’s Series R™ helical rotary screw chillers offer dependable performance and versatility. The RTWD model features expanded heating capabilities up to 165°F, and both RTWD and RTHD models operate with low-GWP refrigerants and are available with the Symbio® 800 equipment controller.

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FAQs

Your questions about rotary screw chillers, answered.

A rotary screw chiller is a type of chiller that uses a rotary screw compressor to compress the refrigerant. This type of chiller is known for its efficiency and reliability, making it suitable for a wide range of applications, including commercial and industrial cooling (and now heating with our RTWD model achieving temps of up to 165F/74C!).

A water-cooled rotary screw chiller works by using a rotary screw compressor to compress the refrigerant, which then absorbs heat from the water circulating through the chiller. The heat is then transferred to a cooling tower or another heat rejection device, where it is dissipated into the atmosphere. This process effectively cools the water, which can then be used for air conditioning or process cooling.

Yes, a helical rotary chiller is a type of screw chiller. The term "helical" refers to the shape of the rotors inside the compressor, which are designed to compress the refrigerant efficiently. Helical rotary chillers are known for their smooth operation and energy efficiency.

The choice between screw chillers and centrifugal chillers depends on the specific application and needs. It's important to assess the specific requirements of your project to determine which type of chiller is the best fit.

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