FLEXY

Highly configurable industrial water chillers

FLEXY series units are high-efficiency, air-cooled water chillers. FLEXY units are characterized by a high level of configurability, i.e. the ability to integrate a wide range of optional equipment. They cover a broad spectrum of cooling capacities, making them a reliable foundation for medium and large industrial and commercial cooling systems. FLEXY is designed for outdoor installation.

The compressor of each refrigeration circuit is semi-hermetic reciprocating type. Capacity control is achieved using high-efficiency frequency inverters that enable soft start and smooth, continuous speed variation. Certain configurations can also achieve capacity control using compressor capacity heads instead of frequency inverters.

Evaporators are plate heat exchangers, reducing the required refrigerant charge. Air condensers are of microchannel aluminum design, and up to 16 such heat exchangers can be installed (configuration P16). Axial fans with EC motors enable variable speed operation, providing outstanding energy efficiency.

Each FLEXY unit is factory tested and delivered pre-charged with refrigerant and oil. Conformity assessment is carried out in accordance with the European Pressure Equipment Directive (PED) 2014/68/EU. The unit complies with all safety and environmental requirements.

Number of refrigeration circuits*: 2

*Number of refrigeration circuits equals the number of compressors

Number of air heat exchangers (condensers): 4

Unit dimensions (depending on configuration and equipment):

• Length without connections: 4247 – 5677 mm
  (depending on equipment configuration)
• Width: 2352 mm
• Height: 2715 mm

As part of the optional equipment, installing separate heat exchangers
for natural cooling (free cooling) affects the unit length. With 6 separate
air heat exchangers installed (forming 3 individual V-modules), the unit
length can reach up to 7822 mm. Integrated free-cooling heat exchangers
do not affect the unit length, as they are integrated within the condenser V-modules.

Cooling capacity:

❮ ❯

Number of refrigeration circuits*: 2 or 3

*Number of refrigeration circuits equals the number of compressors

Number of air heat exchangers (condensers): 6

Unit dimensions (depending on configuration and equipment):

• Length without connections: 4962 – 7107 mm
  (depending on equipment configuration)
• Width: 2352 mm
• Height: 2715 mm

As part of the optional equipment, installing separate heat exchangers for natural
cooling (free cooling) affects the unit length. Integrated free-cooling heat exchangers
do not affect the unit length, as they are integrated within the condenser V-modules.

Cooling capacity:

❮ ❯

Number of refrigeration circuits*: 2 or 4

*Number of refrigeration circuits equals the number of compressors

Number of air heat exchangers (condensers): 8

Unit dimensions (depending on configuration and equipment):

• Length without connections: 4962 – 7107 mm (depending on equipment configuration)
• Width: 2352 mm
• Height: 2715 mm

As part of the optional equipment, installing separate heat exchangers for natural
cooling (free cooling) affects the unit length. Integrated free-cooling heat exchangers
do not affect the unit length, as they are integrated within the condenser V-modules.

Cooling capacity:

❮ ❯

Number of refrigeration circuits*: 2

*Number of refrigeration circuits equals the number of compressors

Number of air heat exchangers (condensers): 10

Unit dimensions (depending on configuration and equipment):

• Length without connections: 7822 – 12112 mm (depending on equipment configuration)
• Width: 2352 mm
• Height: 2715 mm

As part of the optional equipment, installing separate heat exchangers for natural
cooling (free cooling) increases the unit length. Integrated free-cooling heat exchangers
do not affect the unit length, as they are integrated within the condenser V-modules.
With a combination of integrated and separate heat exchangers, configuration P10 can
have up to 14 free-cooling heat exchangers.

Cooling capacity:

Number of refrigeration circuits*: 3 or 4

*Number of refrigeration circuits equals the number of compressors

Number of air heat exchangers (condensers): 12

Unit dimensions (depending on configuration and equipment):

• Length without connections: 9252 – 9967 mm
  (depending on equipment configuration)
• Width: 2352 mm
• Height: 2715 mm

As part of the optional equipment, installing separate heat exchangers for natural
cooling (free cooling) affects the unit length. Integrated free-cooling heat exchangers
do not affect the unit length, as they are integrated within the condenser V-modules.

Cooling capacity:

❮ ❯

Number of refrigeration circuits*: 4

*Number of refrigeration circuits equals the number of compressors

Number of air heat exchangers (condensers): 16

Unit dimensions (depending on configuration and equipment):

• Length without connections: 12827 mm
• Width: 2352 mm
• Height: 2715 mm

As part of the optional equipment, integrated heat exchangers for natural
cooling (free cooling) can be installed. Integrated free-cooling heat exchangers
do not affect the unit length, as they are integrated within the condenser V-modules.

Cooling capacity:

❮ ❯

GENERAL

• Powder-coated galvanized steel housing, corrosion and weather resistant, standard color RAL 7035
• Removable housing panels
• Anti-vibration mounts
• Compressor compartment located in a separate protective enclosure within the housing
• Pipe insulation to prevent condensation
• Safety strategy selection – permanent compressor compartment ventilation or refrigerant leak detector combined with ATEX fan

ELECTRICAL

• Main power switch and phase monitoring relay
• Electrical protection for all components
• Microprocessor controller supervising full unit operation
• Electronic expansion valve for precise refrigerant flow control
• Communication protocols: Modbus TCP/IP, Modbus RTU or BACnet IP
• Remote unit access

HYDRAULIC CIRCUIT

• Stainless steel hydraulic piping
• Hydraulic connection via free stainless steel flanges
• Air vent valve
• Safety valve
• Drain valve (for system filling and draining)
• Flow switch
• Thermal insulation of piping

GENERAL

• Dual safety valves
• Custom housing color
• Low-noise version with additional sound insulation
• Waste heat recovery using a series-connected plate heat exchanger:
  • Condenser – serial heat recovery
  • Desuperheater (no condensation)

ELECTRICAL

• Advanced Siemens Climatix microprocessor controller
• Refrigerant leak detector (instead of permanent compressor compartment ventilation)
• Cabinet lamp with socket
• Electrical cabinet heater (250 W)
• Dry contacts for alarms
• Self-regulating heating cables
• Electrical energy meter
• Remote monitoring (Siemens Cloud)

HYDRAULIC CIRCUIT

• Installation of additional heat exchangers for natural cooling (free cooling) – separate modules or integrated within condenser modules
• Primary-side circulation pump
• Hot-side circulation pump (only when heat recovery is selected)
• Integrated buffer tank (2 connections) or hydraulic separator (4 connections) with primary circulation pump
• Integrated buffer tank (2 connections) with a circulation pump on each refrigeration circuit
• Two-way valve for hot-side flow control (when heat recovery is selected)
• Filter (Y-strainer)
• Expansion vessel
• Flow meter
• Self-regulating heating cables for frost protection
• Hydraulic circuit upgrade using hydromodule