Daikin EWYT215B-XSA2 [4/75] General characteristics

Daikin EWYT590B-SSA2 [4/75] General characteristics
GENERAL CHARACTERISTICS
4 | 75
Compressors
Hermetic orbiting scroll type designed for R-32 operation and complete with motor over-temperature and over-
current protection devices. Each compressor is equipped with an oil heater that keeps the oil from being diluted by
the refrigerant when the unit is not running. The compressors are connected in Tandem or Trio configuration on each
refrigerant circuit. Each compressor is mounted on rubber antivibration mounts for a quite operation. Unit is delivered
with complete oil charge.
Water Side Heat Exchanger
The unit is equipped with a direct expansion plate-to-plate type Heat Exchanger optimized for R-32 refrigerant
operation. This heat exchanger is made of stainless-steel brazed plates and is covered with 20mm closed cell
insulation material. The exchanger is equipped with an electric heater for protection against freezing and Heat
Exchanger water connections are provided with victaulic kit (as standard). The Water Side Heat Exchanger is
manufactured in accordance to 2014/68/EU. The flow switch and the Water Side Heat Exchanger water filter are
available as option (shipped loose). The installation of the flow switch and the water filter is mandatory.
Air Side Heat Exchanger
The Air Side Heat Exchanger is manufactured with internally enhanced seamless copper tubes arranged in a
staggered row pattern and mechanically expanded into lanced and rippled aluminum Air Side Heat Exchanger fins
with full fin collars. An integral sub-cooler circuit provides sub-cooling to effectively eliminate liquid flashing and
increase cooling capacity without increasing the power input.
Air Side Heat Exchanger fans
Air Side Heat Exchanger fans are propeller type with high efficiency design blades to maximize performances. The
blades are made of glass-reinforced resin and a guard protects each fan.
Parallel Coil units are equipped as standard with fan speed modulation (phase cut).
Double V Coil units (standard and low sound versions) are equipped with on/off fans and inverter drive is available
as an option. Double V Coil units reduced noise versions are equipped with inverter driven fans as standard.
Electronic expansion valve
The unit is equipped with electronic expansion valves to achieve precise control of R-32 refrigerant mass flow. As
today’s systems require improved energy efficiency, accurate temperature control, wide range of operating
conditions, the application of electronic expansion valves becomes mandatory.
Electronic expansion valve has unique features: short opening and closing time, high resolution, positive shut-off
function to eliminate use of additional solenoid valve, continuous modulation of mass flow without stress in the
refrigerant circuit and corrosion resistance stainless steel body.
If compared to traditional thermostatic valves, electronic expansion valves allow the system to work with low Air
Side Heat Exchanger pressure (winter time) without any refrigerant flow problems and the perfect control of the
chilled water temperature.
Refrigerant circuit
Each unit has one or two independent refrigerant circuits and each one includes:
Compressor
Refrigerant
Water Side Heat Exchanger
Air Side Heat Exchanger
Electronic expansion valve
4 way valve
Sight glass with moisture indicator
Filter drier
Charging valves
High pressure switch
High pressure transducers
Low pressure transducers
Oil pressure transducer
Suction temperature sensor
Electrical panel
Power and control are in the main panel that is manufactured to ensure protection against all weather conditions.
The electrical panel is IP54 and (when opening the doors) internally protected against possible accidental contact
with live parts. The main panel is fitted with a main switch interlocked door that shuts off power supply when opening.

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