Tender Specification WQL / WQH / WQRC 524-1604 Tender Specification SERIES: WQL / WQH / WQRC 524-1604 TYPE: Water cooled water chiller, heat pump and condenserless unit TECHNOLOGY: multi-scroll compressors, R410A refrigerant CAPACITY RANGE: Cool ing 151-478 [kW] Heating 170-418 [kW]
Tender Specification WQL / WQH / WQRC 524-1604 1 General description WQL / WQH / WQRC units have been designed and optimized to operate with R410A refrigerant and scroll compressors Thanks to multi-scroll technology and asymmetric design in tandem configuration, it is possible to reach very high level of seasonal performances (ESEER up to 5.
Tender Specification WQL / WQH / WQRC 524-1604 Desuperheater option is available for all the sizes: plate type heat exchangers fitted on the compressor discharge line, to recover about 20 % of the total heat rejected to the condenser Several hydraulic options are available in order to cover a wide range of requirements in terms of pump available static pressure and redundancy both for evaporator and condenser side 2 Key points • High full load efficiency EER up to 4.6, COP up to 3.
Tender Specification WQL / WQH / WQRC 524-1604 o Dynamic set point (Climatic, 4-20 [mA], 0-10 [V], 0-5 [V], 0-1 [V]) variable set-point according analogue input 3 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 WQL / WQH / WQRC 524-1604 Victaulic connections. Maximum working pressure is 10 [bar] water side and 45 [bar] refrigerant side 6 Condenser Outdoor heat exchangers are brazed stainless steel plate type. They are insulated with a 10 [bar] thick closed cell polyethylene foam material and provided with Victaulic connections.
Tender Specification WQL / WQH / WQRC 524-1604 8 Control panel A new optimized control is supplied on all the units with a simple user interface (possibility to customize keys functions and to set menus visibility).
Tender Specification WQL / WQH / WQRC 524-1604 • Refrigerant discharge pressure Unit controller can display various alarms and operation status: • Low / High pressure • Evaporator antifreeze • Evaporator lack of water flow • Condenser lack of water flow • Compressor operation / operating hours and start-up numbers • Pump operation / operating hours • Compressor thermal protection • Faulty sensors 9 Safety and control devices Each unit is complete with the following safety and control devices Safety • • •
Tender Specification WQL / WQH / WQRC 524-1604 • Crankcase oil electric heater • Water differential pressure switch (source / plant side) Control • • • • • • • • High pressure transducer Low pressure transducer (EEV option) Evaporator return water temperature sensor Evaporator leaving water temperature sensor (with an antifreeze function) Condenser return water temperature sensor Condenser leaving water temperature sensor Suction temperature sensor (EEV option) Outdoor ambient temperature sensor (OAT opti
Tender Specification WQL / WQH / WQRC 524-1604 • Single or double pump with low available static pressure (100 [kPa]) or high available static pressure (200 [kPa]) • Expansion tank for indoor circuit (18 [l] for all models) • Check valves (in case of 2 pumps) • Safety valve • Automatic air vent valve • Thermal insulation for pipes and water pump(s) 11 Factory installed options • • • • • • • • • • • • ModBus protocol kit for BMS Compressor soft starter Power factor correction capacitors Electronic expansi
Tender Specification WQL / WQH / WQRC 524-1604 12 Field installed accessories • • • • • • • • • • • • Remote ON-OFF control Remote keyboard panel Sequencer, up to max four units Condensing control kit Outdoor air sensor for weather compensation Additional heating device wiring kit Compressor jacket Water flow switch Water pressure switch Victaulic to threaded pipe connection Spring type anti-vibration mounts Water filter 13 Conformity with standards The units are in conformity with the following standard
