Flex II chiller

55-135 kW

Main features Flex II

  • Fully modular system with capacity to connect 6 modules without any restrictions up to 810 kW
  • Compact footprint: all models 2.4 m length x 1 m width. Designed to fit in standard service elevators - no need to rent crane or helicopter to gain access to roof
  • Compliant with Ecodesign Regulation ENER Lot21.  All SEER levels ≥ 3,8
  • Tandem DSH on/off scroll compressors and electronic expansion valves
  • Micro-channel condenser coils resulting in low R410A refrigerant charge = Sustainability and lower costs  
  • Advanced design industrialization to optimize maintenance operations. Full accessibility of all components
Main features Flex HSE (variable speed driven scroll compressors)
  • Cooling capacity: 45-230 kW per module
  • Stepless capacity control: 20-100%
  • Modular: 9 different sizes available
  • Super high part load efficiency
  • Super low noise (optional)
  • WFC technology with inverter water pumps (optional)


Customer benefits

  • Installation anywhere, everywhere 
    • HVAC system designer can play with weight distribution and space organization on e.g. building roof
    • Flexible HVAC plant design and/or aesthetic view. Each module can be installed differently
    • E.g. different roof corners, different floor levels, etc…
  • Non-stop continuous operation
  • Just in time system
  • Easy to handle
    • Perfect for project with limited access
    • Perfect for city center project where roof access is not allowed
    • Perfect for retrofit
  • Flexible and Optimized investment
    • Spread investments with extending capacity step-by-step
    • Add a modular unit only when more capacity is needed, without any cost penalty
    • Without any restrictions at any time of the project without having initally planned for additional capacity
    • Up to 6 units up to 810kW

Options Flex II

  • Desuperheater
  • Heat recovery
  • Low Noise and Super Low Noise
  • Packaged pump stations - Low, Medium, High head pressure, with or without water tank


Accessories for modular connection

  • FlexMaster to connect and control up to 6 modular units
  • Hydraulic connection kit for connection among single modules
  • Hydraulic connection kit for connection among single modules (for hydraulic versions)

Mounted accessories

  • Low ambient temperature kit (down to -10°C)
  • Gas gauges
  • Complete anti-intrusion grilles
  • Power factor correction to cos phi 0.91
  • Control panel electric heater with thermostat
  • Water pumps automatic changeover
  • Phase failure protection relay
  • Serial card with BacNet Protocol MS/TP
  • Serial card with BacNet Protocol TCP/IP
  • Gateway Modbus Lontalk
  • Soft - Start
  • Electrical power supply without neutral 400V/3ph
  • Automatic circuit breakers
  • Step Condensing control
  • Condensing control with variable fan speed modulation
  • High static pressure EC fans up to 100 Pa
  • Axitop diffusers
  • E-coated anti-corrosion condensing coil treatment
  • Sea container kit
  • Flow switch
  • Automatic water filling
  • Water strainer
  • Remote control display
  • Water gauges
  • Victaulic Kit
  • Rubber or spring antivibration mounts
  • Modbus RS485
  • Electronic expansion valve
  • Numbered wires

FlexMaster Controller

  • Control up to 6 units, of equal or different capacity   (2-pipe systems)
  • Hydraulic kit control: management of external water pump group or water pumps integrated in each unit
  • Set point management: adjustment based on inlet or outlet water temperature as provided by the probe
  • RS 485 serial communication between modular unit(s) and FlexMaster controller
  • Multi-language interface
  • PVC box with transparent door, UV resistant & IP Class 66
  • Potential free contacts for generic alarm signals and for water pump activation
  • Potential-free contacts for:
  • Activation of the system
  • Seasonal setting adjustments with external signal
  • Possible alarm state of external water pump(s)
  • Double set point management
  • BMS connection via Modbus protocol / RS485
  • Input & output probes for the main user
  • External air probe
  • Probes for secondary user temperature control like total or partial recovery and DHW (only if required)

FlexMaster anywhere, everywhere

  • Ideal for connecting multiple Flex modular units to one single “Master controller”
  • For expanding capacity of chiller/heat pump plant
  • To control the main functions and operating modes of the modular units
  • Non-stop operation!  In case of preventive or corrective maintenance necessary on one module all other modular units keep on running
  • Back-up or stand-by capacity
    • Number of installations with a request for back-up or stand-by capacity is increasing (e.g. hospitals, banks, data centers, high class apartment buildings, etc…..)
    • Traditional systems require a second unit with similar capacity.  Flex modular systems reach same effect by simply adding a modular unit
    • Control up to 6 units of equal or different capacities


Search for more product material

* Disclaimer: Attempting to alter the values in the datasheet is strictly forbidden and Trane shall not be liable for any misuse of the data provided or generated. Trane will also undertake any appropriate legal action to protect its interests in case of violation of this prohibition.

Contact Request Form