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Y-Flow Series 40-450 kW

Class A Unit (Radian Applications)
For Applications with Underground or Urban Water
or Geothermal Probes
Wide Range of Equipment and Accessories


Eurovent Certified Outstanding Performance
High Energy Efficiency and Comfort in All Seasons
Wide and Smart Options


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Technical Features
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Compressor: Hermetic scroll compressor which is equipped with thermal protection and crankcase heater.
Front Side (User) Heat Exchanger: Equipped with appropriately insulated stainless steel plates, anti-freeze heater and water flow differential pressure switch.
Discharge Side Heat Exchanger (Floor / Aqueduct/ Geothermal Probes): Equipped with appropriately insulated stainless steel plates, anti-freeze heater and water flow differential pressure switch (for THHEY).
Control: Electronic control with microprocessor which operates with Adaptive Function Plus.
Structure: It is made of polyester powder coated and galvanized steel sheet and coated with a soundproof panel from the inner section.


• LT-Hot water production up to 52°C.
• HT-Hot water production up to 55°C.


TCHEY: The unit that is designed for cooling only.
THHEY: Heat pump unit.


• Front Side (User): It is equipped with single or double pump, which contains an automatic pump that can be operated in standby mode, expansion tank, safety valve, water feeding/discharge valve, air relief valve and pressure gauge.
• Low or high pressure versions of those pumps are available.
• Discharge Unit (Geothermal Probes / Dry Cooler): Single or double electric pump – one in standby mode - which is regulated through a transformer with automatic activation feature.
• Superheated steam cooler.
• Full (100%) heat recovery (245-4360 mods).
• Water circuit heat pump (only for TCHEY).
• Soft starting device.
• Electronic Expansion Valve (standard for 4410-4450 models).
• High and low pressure gauges for the refrigerant circuit.
• Silenced version.
• Low set point temperature for the water.
• Digital input for double set point.
• 0-lOV analogue input for the condensation control through an external device.
• 4-20mA analogue input for variable set point.
• Interfaces for serial communication with other devices.
• Rubber anti-vibration supports.


• 3 way valve that performs modulation for the condensation control.
• Outdoor air temperature probe for the set point compensation.
• Free cooling kit (mod. 245-2185).
• Water filter.
• Remote Keyboard with display.
• Clock board.
• Convertor in series (RS485/USB).
• Üntes Supervisors for unit monitoring and remote management.
• Üntes Sequencer for integrated management of multiple chillers.