ALSW Series / 40 – 405 TR-R 134a
Water Cooled Screw Chillers (ALSW Series with screw compressors), which use R134 or R407 refrigerant gas, have low energy consumption, high efficiency, and desirable cooling operation, and are used to provide cooling systems in various buildings, industrial projects, and manufacturing processes.
Features of water cooled chillers (ALSW Series):
- Having Semi-closed screw compressors (Bitzer, Germany; Hanbell, Taiwan)
- Using Shell and tube evaporators
- Using Shell and tube type condensers
Machine-installed conventional equipment:
- High and Low pressure mechanical control switches
- Compressor suction and liquid line valves for repair and maintenance
- Phase control for input phases and phase symmetry
- Mechanical temperature switch to protect the evaporator
- Microprocessor controller with digital screen
- Water-flow differential pressure switch
- High and Low pressure transmitters
- Safety valve on the liquid line
- Compressor electronic protection module
- Compressor oil-level control switch
- Sensor to indicate compressor coil temperature
- High and Low pressure indicator mechanical gauges for each separate circuit
- Compressor heater
- Electronic expansion valve to control the superheat rate under all working conditions
- 25-100% continuous capacity control based on the cryogenic load demand
- Connectability to the integrated BMS through the Modbus protocol
- Rubber shock-absorber
Custom-made possibilities:
- Water-cooled screw chillers with hybrid operation (one compressor with linear capacity control and one with inverter operation)
- Designability and producibility with inverter compressors
- Designability and producibility with R407-C refrigerant gas
- Designability with low-noise operation
- Designability with super low-noise operation
- Usability of open-type screw compressors for specific applications
- Star/Triangle setup to reduce the startup current
- Usability of 0-10 V or 4-20 mA analog inputs for set-point variations
- Controllability of all equipment through PLC with such brands as Siemens, Schneider Electric, etc.
- Inter-connectability of multiple chillers manageable as a single unit and spare chillers and working hours management
- Different-dimension touch screens
- Usability of liquid injection systems to prevent the liquid temperature rise and extend compressor life time
- Usability of thermostats in the upstream
- Digital inputs for upstream control
- Usability of protective mechanical equipment including propulsion line silencers (mufflers) and suction line accumulators
- Usability of high- and low-pressure circulator pumps with the operability of one as a spare pump
- Installability of the evaporator’s water storage tank
- Usability of the cooling water line hydraulic equipment (e.g. gauge, expansion tank, bleeding/safety valve, etc.)
- Installability of controlling equipment to reduce energy consumption
- Installability of soft starters
- Usability of anti-freeze heater on the evaporator
- Installability of economizer using plate heat exchangers
- Installability of mechanical filters in suction and liquid lines
- Installability of quick-connection hydraulic equipment
- Installability of the compressor oil-level indicator sensor
