Tender Specification SyScrew 300-1400 Air CO Tender Specification SERIES: SyScrew 300-1400 Air CO TYPE: Air cooled water chiller TECHNOLOGY: screw compressors, R134a refrigerant CAPACITY RANGE: Cool ing 295-1395 [kW]
Tender Specification SyScrew 300-1400 Air CO General description SyScrew Air units have been designed and optimized to operate with R134a refrigerant, in order to match the market target and fulfill the requirements for comfort and industrial process application SyScrew Air units are available in 21 sizes, with a nominal capacity range from 295 to 1395 [kW] All units are equipped with two separated refrigerant circuits, each one equipped with one screw compressor SyScrew Air can be supplied with 3 acoustic
Tender Specification SyScrew 300-1400 Air CO To increase its application field, SyScrew Air range is available in two additional versions: • HT (High Temperature) version: same equipment as the basic version, but also fitted with brushless EC fan motors to ensure low energy consumption and to operate on a wider envelope • HPF (High Pressure Fans) version: same equipment as the basic version, but also fitted with brushless EC fan motors so as to provide external static pressure up to 120 [Pa] Two heat recov
Tender Specification SyScrew 300-1400 Air CO 1 Key points • Common configuration for the different versions Easy upgrade of the units in stock or on field • Electronic expansion device Excellent control of superheating for the best performance at full and partial load and for a safe operation • Microchannel coils Significant reduction on refrigerant charge and operating weight • New generation of pure counter-current shell&tube evaporators Maximum efficiency and new levels of competitiveness • Comp
Tender Specification SyScrew 300-1400 Air CO 2 Cabinet The cabinet is made of heavy gauge galvanized steel All galvanized steel components are individually painted by a special painting process before the assembly of the unit. This painting system performs a homogeneous protection to the corrosion The painting is a polyester powder based type, colored in RAL 7040.
Tender Specification SyScrew 300-1400 Air CO 4 Evaporator Internal heat exchanger is direct expansion shell & tube type, with an innovative refrigerant distribution system and single-pass pure countercurrent design, so as to reach maximum efficiency and new levels of competitiveness Pipe bundle is made of inner grooved tubes to maximize the R134a heat transfer coefficient and to limit the negative effects of refrigerant pressure drop Steel housing is insulated by UV resistant closed cell polyethylene foam
Tender Specification SyScrew 300-1400 Air CO 6 Condenser fans Condensing decks are equipped with 800 [mm] diameter axial fan motors with profiled, sickle shaped blades designed with bionical know how. Fan motors have IP54 protection grade, and thermostat protection placed in the bearings.
Tender Specification SyScrew 300-1400 Air CO 8 Control panel A new optimized control with an easy-friendly interface, manages unit operation under different load and temperature condition and can provide: • Compressor management o Power on/off o Anti-cycle o Unloading for high pressure, high temperature and/or high compressor pressure ratio • Chilled and hot water temperature regulation (return water temperature RWT - P+I type or leaving water temperature LWT - neutral band type) • Automatic control of suc
Tender Specification SyScrew 300-1400 Air CO o General alarm • Hydro-kit management • Heat recovery management by means of RWT sensor at the heat recovery condenser Unit controller can display all operating parameters such as: • Return water temperature • Leaving water temperature • Outdoor ambient temperature • Refrigerant discharge pressure • Refrigerant suction pressure • Refrigerant suction temperature • Refrigerant discharge temperature • Heat recovery temperature Unit controller can display various a
Tender Specification SyScrew 300-1400 Air CO 9 Safety and control devices Each unit is complete with the following safety and control devices Safety • • • • • • • • Power disconnect switch with an emergency stop function Phase sequence control High pressure switches Low pressure switches Evaporator antifreeze electric heater Crankcase oil electric heater Safety valve on discharge lines Safety valve on suction lines Control • • • • • • • High pressure transducers Low pressure transducers Discharge gas te
Tender Specification SyScrew 300-1400 Air CO • Heat recovery temperature sensor (TR only) 10 Optional hydro kits On board mounted and remote hydro-kits are available as option. On board hydro kits can be supplied only without buffer tank while remote hydro kits (supplied loose for field installation) are always provided with internal tank.
Tender Specification SyScrew 300-1400 Air CO 11 Factory installed options • • • • • • • • • • • • • • • • • • • Lonwork protocol kit for BMS Bacnet protocol kit for BMS Compressors soft-starter Fan speed control for low ambient operation Double set-point Power factor correction capacitors Automatic circuit breaker HP & LP gauges Compressor suction valves Compressor oil level switch Compressor stepless control Al/Cu finned tubes coils E-coating for Al/Cu finned tubes coils Condenser coils with copper fins
Tender Specification SyScrew 300-1400 Air CO 12 Field installed accessories • • • • • • • • • Remote ON/OFF control Remote keyboard panel Sequencer, up to max four units Master and slave control, up to max four units Anti-vibration spring Water flow switch Water pressure switch Water filter Remote hydro kits with 2.
