Daikin EWADC16C-XS [5/96] Compressor asymmetric single screw

Daikin EWADH14C-SR [5/96] General characteristics
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GENERAL CHARACTERISTICS
Cabinet and structure
The cabinet is made of galvanized steel sheet and painted to provide a high resistance to corrosion.
Colour Ivory White (Munsell code 5Y7.5/1) (±RAL7044).The base frame has an eye-hook to lift the unit
with ropes for an easy
installation. The weight is uniformly distributed along the profiles of the base and this facilitates the arrangement of the unit.
Compressor (Asymmetric Single Screw)
The compressor is semi-hermetic, single-screw type with gate-
rotor made with
the latest high-
strength fibre reinforced star material. The compressor has an asymmetric slide regulation managed by the unit
controller for infinitely modulating capacity from 100% to 25%. An integrated high efficiency oil separator
maximizes the oil separation
and standard start is Wye-Delta (Y-∆) type.
Refrigerant
The compressors have been designed to operate with R-
Potential) and very low GWP (Global Warming Potential), resulting in low TEWI (Total Equivalent Warming Impact).
Evaporator (Shell&Tube)
The unit is equipped with a direct expansion shell&tube evaporator with refrigerant evaporating
inside the tubes and water flowing outside. The tubes are enhanced for maximu
m heat transfer and rolled into steel tube sheet and
sealed.
The evaporators are single-pass on both the refrigerant and water sides for pure counter-
flow heat exchange and low refrigerant
pressure drops. Both attributes contribute to the heat exchanger ef
fectiveness and total unit’s outstanding efficiency. The water side is
designed for 10 bar of maximum operating pressure and is provided with vents and drain.
The external shell is covered with a 20mm closed cell insulation material and the evaporator
water connections are provided with
victaulic kit (as standard). Each evaporator has 2 or 3 circuits, one for each compressor and is manufactured in accordance t
o 97/23/EC
directive (PED).
Condenser
The condenser is manufactured with internally enhanced
seamless copper tubes arranged in a staggered row pattern
and mechanically expanded into lanced and rippled aluminum condenser 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.
Heat Recovery Exchanger
The unit is equipped with a plate to plate type heat exchanger for each circuit made of stainless
steel brazed plates and manufactured in accordance to PED approval.
Condenser fans (ø 800)
The condenser fans are propeller type with high efficiency design blades to maximize performances.
The material of the blades is glass reinforced resin and each fan is protected by a guard. Fan motors are protected by circuit breaker
s
(installed inside the electrical panel as a standard) and are IP54.
Electronic expansion valve
The unit is equipped with the most advanced electronic expansion valves to achieve precise
control of refrigerant mass flow. As today’s system requires impro
ved energy efficiency, tighter temperature control, wider range of
operating conditions and incorporate features like remote monitoring and diagnostics, the application of electronic expansion
valves
becomes mandatory.
Electronic expansion valves possess 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.
Electronic expansion valves are typically working with lower
P between high and low pressure side, than a thermostatic expansion
valve. The electronic expansion valve allows the system to work with low condenser pressure (winter time) without any
refrigerant flow
problems and with a perfect chilled water leaving temperature control.
Refrigerant circuit
Each unit has 2 or 3 independent refrigerant circuits and each one includes:
• Compressor with integrated oil separator
• Refrigerant
• Evaporator
• Air Cooled Condenser
• Electronic expansion valve
• Discharge line shut off valve
• Liquid line shut off valve
• Sight glass with moisture indicator
• Filter drier
• Charging valves
• High pressure switch
• High pressure transducers
• Low pressure transducers
• Oil pressure transducer

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