Daikin EWADC19C-XS [94/96] Technical specifications
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Daikin EWADC19C-XS [94/96] Technical specifications

Daikin EWADC11C-XL [94/96] Technical specifications
94
TECHNICAL SPECIFICATIONS
Evaporator
The units shall be equipped with a direct expansion shell&tube evaporator with copper tubes rolled into steel
tubesheets. The evaporator shall be single-pass on both the refrigerant and water sides for pure counter-
flow heat exchange and low
refrigerant pressure drops.
• The external shell shall be linked with an electrical heater to prevent freezing 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 2 or 3 circuits, one for each compressor and shall be single refrigerant pass.
• The water connections shall be VICTA
ULIC 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.
Condenser coil
The unit shall be equipped with condenser coils
constructed with internally finned seamless copper tubes and
arranged in a staggered row pattern and mechanically expanded into lanced and rippled aluminium fins with full fin collars fo
efficiencies. The space between the fins is given 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 th
e possibility 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.
Condenser fans
The condenser fans used in conjunction with the con
denser coils, shall be propeller type with glass reinforced
resin blades for higher efficiencies and lower sound. Each fan shall be protected by a fan guard.
• The air discharge shall be vertical and each fan must be coupled to the electrical motor, suppli
ed as standard to IP54 and capable to
work to ambient temperatures of - 20°C to + 65°C.
• The condenser fans shall have as a standard a thermally protection by internal thermal motor protection and protected by ci
rcuit
braker installed inside the electrical panel as a standard.
Refrigerant circuit
The unit shall have two or three refrigerant circuits (depending on the size).
• The circuit shall include as standard: electronic expansion device piloted by unit’s microprocessor control, compressor discharge shut-
off valve, liquid line shut-
off valve, sight glass with moisture indicator, replaceable filter drier, charging valves, high pressure switch,
high and low pressure transducers, oil pressure transducer and insulated suction line.
Condensation control
Th
e units will be provided with an automatic control for condensing pressure which ensures the working
at low external temperatures down to - …………… °C, to maintain condensing pressure.
• The compressor automatically unloads when abnormal high condensing pres
sure is detected. This to prevent the shutdown of the
refrigerant circuit (shutdown of the unit) due to a high-pressure fault.
Low sound unit configurations (on request)
The unit compressor shall be connected with unit’s metal base frame by
rubber antivibration supports to prevent the transmission of vibrations to all metal unit structure, in order to control the unit sound.
• The chiller shall be provided with an acoustical compressor enclosure. This enclosure shall be realized with a light, corros
ion resisting
aluminium structure and metal panels. The compressor sound-proof enclosure shall be internally fitted with flexible, multi-
layer, high
density materials.
Hydronic kit options (on request)
The hydronic module shall be integrated in the chiller
chassis without increasing its
dimensions and includes the following elements: centrifugal pump with motor protected by a circuit breaker installed in contr
ol panel,
water filling system with pressure gauge, safety valve, drain valve.
• The hydronic module shall be assembled and wired to the control panel.
• The water piping shall be protected against corrosion and freezing and insulated to prevent condensation.
• A choice of two pump types shall be available:
- in-line single pump
- in-line twin pumps.
Electrical control panel
Power and control shall be located in the main panel that will be manufactured to ensure protection
against all weather conditions.
• The electrical panel shall be IP54 and (when opening the doors) internally protected with plexigl
as panel against possible accidental
contact with electrical components (IP20).
• The main panel shall be fitted with a main switch interlocked door.
• The power section will include compressors and funs protection devices, compressors and fans starters an
d control circuit power
supply.

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