AquaForce^® - Variable-speed water-cooled screw chiller using HFO R-1234ze refrigerant or R-515B
30XW-VZE

Low energy consumption

• Designed for high performance both at full load and at part load
• SEPR up to 10.7 and SEER up to 8.8
• Inverter-driven twin-rotor screw compressors allow precise capacity matching of building load changes and significantly reduce unit power input, especially at part-load
• Flooded multi-pipe heat exchangers for increased heat exchange efficiency
• Electronic expansion device permitting operation at a lower condensing pressure and improved utilization of the evaporator heat exchange surface
• Optimized electrical performance

High reliability

• Offers increased global performance
• Inverter-driven screw compressors with oversized bearings and motor cooled by suction gas. The inverter is optimized for each compressor motor to ensure reliable operation and easy maintenance
• Two independent refrigerant circuits
• Auto-adaptive control
• Exceptional endurance tests

Safe Design

• Specific polyol ester oil qualified by Carrier for using with HFO-1234ze or R-515B to guarantee and maintain reliable bearing lubrication
• Specific compressor gaskets compatible with HFO-1234ze or R-515B, tested and validated by Carrier
• New relief valves designed for operation with HFO-1234ze or R-515B
• New control algorithms
• Specific documentation that contains all the installation, operation, maintenance and safety instructions

Easy and fast installation

• Compact design
• Simplified electrical connections
• Simplified water connections
• Fast commissioning

Minimized operating sound levels

• Low noise Greenspeed^® variable-speed fans
• The inverter technology used for the compressor motors minimizes noise levels at part load operation
• Silencers on the compressor discharge line
• Sound insulation on the components that are most subjected to radiated noise
• Option 257 further reduces the global unit sound level

Environmental care

• PUREtec™  R-1234ze long-term refrigerant solution
  • HFO refrigerant with nearly zero global warming potential (GWP<1) and zero ozone depletion potential (ODP=0)
  • Not impacted by the HFC phase down plan in Europe
• R-515B future-proof A1 refrigerant
• Leak-tight refrigerant circuit

Designed to support green building design

A green building is a building that is environmentally sustainable and has been designed, constructed and is operated to minimize the total impact on the environment. The resulting building will be economical to operate, offer increased comfort and create a healthier environment for the people who live and work here, increasing productivity. The air conditioning system can use between 30 and 40%  of the annual building energy consumption. Selection of the right air conditioning system is one of the main aspects to consider when designing a green building. For buildings with a variable load throughout the year, 30XW-VZE unit offers a solution to this important challenge.

Inverter-driven Thunderbolt screw compressor

• Advanced control algorithms combine inverter frequency output with motor input logic to minimize mechanical part stress, resulting in best compression performance and high chiller reliability
• Equipped with bearings with oversized rollers, oil pressure lubricated for reliable and durable operation, even at maximum load
• Screw compressors use positive displacement principle to compress gases at higher pressure. As a result, in case of exceptional high temperature condenser side, the compressor does not switch off, but continues operation at reduced capacity (unloaded mode)
• The silencer in the discharge line considerably reduces discharge gas pulsations for much quieter operation
• Condenser includes an oil separator that minimizes the amount of oil in circulation in the refrigerant circuit and redirects it to the compressor function

Touch pilot control

• An intuitive user-friendly colored 7" interface
• Direct access to the unit's technical drawings and the main service documents
• Screen-shots with coincisive and clear information in local languages
• Complete menu, customized for different users
• Safe operation and unit setting: password protection ensures that unauthorized people cannot modify any advanced parameters
• Simple and "smart" intelligence uses data collection from the constant monitoring of all machine parameters to optimize unit operation
• Energy management

Remote management (standard)

• Units with Touch Pilot control can be easily accessed from the internet, using a PC with an Ethernet connection. This makes remote control quick and easy and offers significant advantages for service operations
• Equipped with an RS485 serial port that offers multiple remote control, monitoring and diagnostic possibilities
• Communicates with other building management systems via optional communication gateways
• The following commands/visualizations are possible from remote connection:
  • Condenser pumps control: a digital input allows verification of condenser water flow (the flow switch must be supplied by the installer)
  • Start/Stop of the machine
  • Dual set-point management through a dedicated contact is possible to activate a second set-point (example: unoccupied mode)
  • Demand limit setting: to limit the maximum chiller capacity to a predefined value
  • Operation visualization: Indication if the unit is operating or if it is in stand-by (no cooling load)
  • Alarm visualization