Water Cooled Screw Chiller for Air Conditioning

Semi hermetic screw compressor with in-built motor
Refrig : R-134A (CFC Free),R- 407C (CFC Free), R-22 (Freon)
Also available in dx option for direct coupling to AHUs
Available with choice of Hanbell, Bitzer & J&E Hall Screw Comp.

Functions and Features:

CHOICE OF SCREW COMPRESSOR of Hanbell (Taiwan), Bitzer (Germany) & J&E Hall (UK). All options are semi-hermetic in construction, thereby making it maintenance friendly. Due to geometrically symmetrical moving parts, the compressors have extremely low vibration and are tested in accordance with AHRI/European Standards. Oil level switch, CCH heater and economiser port are provided as standard part of the OEM supply along with check valves at suction and discharge port.

HIGH COP/EER as a result efficient condensing of the refrigerant. These water cooled chiller units are designed to meet the applicable requirements of ASHRAE/ANSI 15 Safety Code. Since the condensers are generously oversized, efficient condensing of the refrigerant leads to lower IKW compared with other available brands.

SHELL & TUBE EVAPORATOR is built with copper tubes of 19 SWG that enables them to withstand hard water with PH greater than 8. The copper tubes contain Flamingo patented star turbulator inserts that provide turbulence to the refrigerant flowing through the copper tubes. As a result of this turbulence these Shell & Tube evaporators have extremely efficient heat transfer with the copper tube. The shell is manufactured from high-grade steel. The evaporator is designed as per ASME Section VIII Div.1.

ULTRA EFFICIENT CONDENSING using outer finned copper tubes results in better heat transfer between the cooling water and refrigerant as it results of increased surface area of the copper tube in comparison to a copper tube without finning. The copper tubes are of 16 SWG and are finned on the outer surface for up to 26 fins per inch. The copper tubes are mechanically expanded in a torque controlled process on the tube sheets that are manufactured on imported VMC machine. Since the tube sheets are manufactured on VMC machines the pitch between copper tubes is precise.

ECONOMIZER FOR HIGHER EFFICIENCY is provided as standard part of water cooled screw chiller equipment designed for air conditioning application. The economizer/sub-cooler enhances the overall capacity of the chiller by 10%, and reduces the power consumption, thereby increasing the overall Coefficient of Performance (COP).

AVAILABLE IN A CHOICE OF REFRIGERANTS R-22 (Freon), R-407C and R-134a. Both R-407C and R-134A are environment friendly and non-ozone depleting refrigerants.

LIQUID INJECTION is a standard feature and is used to cool the compressor motor winding. As soon as the discharge temperature exceeds the normal range, an electric solenoid coil injects liquid refrigerant to keep the winding temperature within limits. This feature enhances the life of the screw compressor.

THERMOSTATIC EXPANSION VALVE is provided as a standard part of the water cooled screw chiller equipment. Electronic expansion valve can be optionally provided.

CONTROL PANEL with IP-65 protection is provided as standard part of the water cooled equipment.

MICROPROCESSOR BASED CONTROLLER is a standard part of the water cooled screw chiller equipment.  The controller allows numerous set points that can be configured to particular set of values that may be considered within the safe operating range. In case of any breach in any of the set point value the controller will trip the chiller after the fed safety delay period has passed and display it on the LCD display. Besides, the controller automatically adjusts the capacity in a stepped format making them ideal for variable load applications.

Optional Features:

ELECTRONIC EXPANSION VALVE allows for precise control of refrigerant flow through the evaporator. The electronic expansion valve is very sensitive to load variations and adjusts the flow of refrigerant with short response times to achieve power savings.

ADVANCED MAGNUM STEP-LESS CAPACITY CONTROLER makes the chiller highly efficient in part load conditions as itadjusts the capacity steplessly (25%~100%). Besides the Magnum controller allows direct communication through RS-485 to MODBUS and can be easily integrated to most BMS systems (Building Management Systems) available in the market.

SOFT STARTER providessmooth acceleration as voltage or current is applied gradually. Besides Soft starters also stop the motor gradually as opposed to sudden stopping experienced in DOL or Star Delta type starter panels. This additional feature increases the compressor bearing life.

INDIVIDUALY CUSTOMISED solutions are also available for direct expansion options for coupling to single or multiple AHUs.

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