Daikin EWAH620TZ-XSB2 [8/102] General characteristics
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Daikin EWAH620TZ-XSB2 [8/102] General characteristics

Daikin EWAH220TZ-XSB1 [8/102] General characteristics
8/100
GENERAL CHARACTERISTICS
technology ensures the highest performance with the minimum surface for the exchanger. The quantity of
refrigerant is also reduced compared to Cu/Al condenser.
Special treatment ensure resistance to the corrosion by atmospheric agents extending the life time.
Note: for application in industrial, costal high pollutted urban environment or combinations of the above a proper
evaluation is needed to understand if, according to the specific environment, additional protections measures
are needed.
Condenser fans
SILVER: The ON/OFF 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 breakers installed inside the electrical panel as a standard. The motors are IP54
and are suitable for use with inverters (available as option).
GOLD: The Inverter Driven (AC inverter type) 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 breakers installed inside the electrical panel as a standard. The
motors are IP54.
PLATINUM: The condenser fans are “brushless” (EC) type and are made with synchronous motors excited by
permanent magnets and with phase currents controlled by a PWM inverter integrated in the fan motor housing,
that allows operation at different speeds. With this technology the fans reach high efficiencies with an extremely
low noise level across a very wide speed range. The motors 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 improved 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 ΔP 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 one or two independent refrigerant circuits and each one includes:
•
Compressor Inverter driven 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
•
Economizer circuit with electronic expansion valve
•
Charging valves
•
High pressure switch
•
High pressure transducers
•
Low pressure transducers
•
Oil pressure transducer
•
Suction temperature sensor
Electrical control panel Power and control are located 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.
Power Section The power section includes compressors and fans protection devices, fans starters and
control circuit power supply.

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