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EWWQ290L-SS
Технические данные Страница: 38

Daikin EWWQ290L-SS [38/41] Technical specifications

TECHNICAL SPECIFICATIONS

General The unit will be designed and manufactured in accordance with the following European directives:

• Construction of pressure vessel 97/23/EC (PED)

• Machinery Directive 2006/42/EC

• Low Voltage 2006/95/EC

• Electromagnetic Compatibility 2004/108/EC

• Electrical & Safety codes EN 60204–1 / EN 60335-2-40

• Manufacturing Quality Standards UNI – EN ISO 9001:2004

To avoid any losses, the unit will be tested at full load in the factory (at the nominal working conditions and water temperatures). The

chiller will be delivered to the job site completely assembled and charged with refrigerant and oil. The installation of the chiller must

comply with the manufacturer’s instructions for rigging and handling equipment.

The unit will be able to start up and operate (as standard) at full load with:

- evaporator leaving fluid temperature between ............... °C and ............... °C

- condenser leaving fluid temperature between ............... °C and ............... °C

Refrigerant Only HFC 410A can be used.

Performance The unit shall supply the following performances:

• Number : ............... unit(s)

• Cooling capacity for single unit : …………… kW

• Power input for single chiller in cooling mode : ............... kW

• Evaporator heat exchanger entering water temperature in cooling mode : ............... °C

• Evaporator heat exchanger leaving water temperature in cooling mode : ............... °C

• Evaporator heat exchanger water flow : ............... l/s

• Condenser heat exchanger entering water temperature in cooling mode : ............... °C

• Condenser heat exchanger leaving water temperature in cooling mode : ............... °C

• Condenser heat exchanger water flow : ............... l/s

Operating voltage range should be 400V ±10%, 3ph, 50Hz, voltage unbalance maximum 3%, without neutral conductor and shall only

have one power connection point.

Unit description The unit shall include as standard: one or two refrigerant circuit, two or four hermetic type rotary scroll

compressors (according to the capacity), electronic expansion device (EEXV), refrigerant direct expansion plate to plate heat

exchangers, R-410A refrigerant, motor starting components, control system and all components necessary for a safe and stable unit

operation.

The chiller will be factory assembled on a robust base frame made of galvanized steel, protected by an epoxy paint.

Sound level and vibrations Sound pressure level at 1 meter distance in free field, hemispheric conditions, shall not exceed

………dB(A). The sound pressure levels must be rated in accordance to ISO 3744 (other types of rating can not be used).

Vibration on the base frame should not exceed 2 mm/s.

Dimensions Unit dimensions shall not exceed following indications:

- Unit length ............... mm

- Unit width ............... mm

- Unit height ............... mm

Compressors The units shall be equipped with:

• High performance hermetic scroll compressors optimized to work with R410a, with reduced vibration and sound emissions. High

efficiency values shall be guaranteed:

-by high volumetric efficiency in the whole range of application, through the continuous contact between the fixed and the orbiting

scroll deleting the dead space and the re-expansion of the refrigerant gas;

-by low pressure drops due to the absence of inlet and discharge valves and to the uniform compression cycle;

-reduction of the heat exchange between the gas during suction and discharge due to the separation of gas flows;

•The reduced noise shall be obtained: -for the absence of the inlet and discharge valves

-for the uniform compression cycle

-for the absence of pistons which ensures reduced vibration and pulsation of the refrigerant

• The engine shall be cooled by the suction refrigerant fluid.

• The terminal shall be contained in a casing with protection degree IP 54.

• The compressors shall be provided with crankcase heater to prevent the dilution of refrigerant and oil the during the stops of the unit;

• Shall be present an electronic thermal protection for the three phases complete with sensors on the stator windings to avoid

overheating caused by lack of phase, insufficient cooling, mechanical locks, power supply out of tolerance;

•The compressors shall be connected in Tandem on a single refrigerating circuit.

•The compressors shall be fitted on rubber antivibration mounts.

•The compressors shall be provided complete with oil charge.

Page 38 of 41

Daikin EWWQ290L-SS [38/41] Technical specifications

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