Daikin EWAQ320E-XL [31/34] Unit description
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Daikin EWAQ320E-XL [31/34] Unit description

Daikin EWAQ320E-XL [31/34] Unit description
TECHNICAL SPECIFICATIONS
General
The chiller 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:
- outside air temperature from ............... °C to ............... °C
- evaporator leaving fluid temperature between ............... °C and ............... °C
Refrigerant Only HFC 410A can be used.
Performance
Chiller shall supply the following performances:
• Number of chiller(s) : ............... unit(s)
• Cooling capacity for single chiller : ............... kW
• Power input for single chiller in cooling mode : ............... kW
• Heat exchanger entering water temperature in cooling mode : ............... °C
• Heat exchanger leaving water temperature in cooling mode : ............... °C
• Heat exchanger water flow : ............... l/s
• Nominal outside working ambient temperature in cooling mode : ............... °C
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
Chiller sh
all include as standard: one refrigerant circuit, two or three hermetic type rotary scroll compressors
(depending on the size), electronic expansion device (EEXV), refrigerant direct expansion plate to plate heat exchanger, air-
cooled
condenser section, 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, semispheric 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
Evaporator (PHE) The units shall be equipped with a direct expansion plate to plate type evaporator.
• The evaporator will be made of of stainless steel brazed plates and shall be linked with an electrical heater to prevent fr
eezing down
to -28°C ambient temperature, controlled by a thermostat and shall be insulated with flexible, closed cell polyurethane insulation
material (20-mm thick).
• The evaporator will have 1 refrigerant circuit.
• The water connections shall be VICTAULIC type connections as standard to ensure quick mechanical
disconnection between the unit
and the hydronic network.
• The evaporator will be manufactured in accordance to PED approval.
• Flow switch will be standard factory mounted.
• Water filter will be standard.
Condenser coil
The unit shall be equipped with co
ndenser coils constructed with internally finned seamless copper tubes and
arranged in a staggered row pattern and mechanically expanded into lanced and rippled aluminum fins with full fin collars for
higher
efficiencies. The space between the fins is give
n by a collar that will increase the surface area in connection with the tubes, protecting
them from ambient corrosion.
• The condenser coils will have an integral subcooler circuit that provides sufficient subcooling to effectively eliminate the possibili
ty of
liquid flashing and increase the unit's efficiency with 5% to 7% without increasing in energy consumption.
• The condenser coils shall be leak-tested and submitted to a pressure test with dry air.
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