Daikin EWYT215B-XSA2 [5/75] General characteristics

Daikin EWYT235B-SRA2 [5/75] General characteristics
GENERAL CHARACTERISTICS
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MicroTech 4 controller
The new MicroTech 4 controller is installed as standard in all Daikin units.
It gives the possibility to check the most relevant control parameters and modify unit set-points. A built-in display
shows unit operating status. Additionally, temperatures and pressures of water, refrigerant and air, programmable
values, set-points can be accessed based on a preset list of user profiles.
A sophisticated software with adaptive logic, selects the most energy efficient combination of compressors, EEXV
and fans to keep stable operating conditions to maximize unit energy efficiency and reliability. MicroTech 4 protects
critical components based on external signals from onboard sub-system (such as motor temperatures, refrigerant
and oil pressures and temperatures, correctness of phase sequence, pressure switches and freezing of heat
exchanger).
The input coming from high-pressure switches cuts all digital output from the controller in less than 50ms, as an
additional security for the equipment. Fast program cycle (less than 200ms) for a precise monitoring of the system
and sub-systems. Floating point calculations supported for increased accuracy in Pressure / Temperature
conversions.
Control main features
Control system has the following feature:
Management of compressors and fans modulation;
Control of cooling or heating leaving water temperatures;
Management of cooling and heating capacities according to the load;
Switch of operating modes in less than 1 minute;
Return reset (set point reset based on return water temperature);
• Set point reset (optional);
• Unit operation in partial failure condition;
• Managed operations during critical conditions:
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High ambient temperature;
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High thermal load;
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Startup with high and low differential operating conditions;
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Startup with high entering water temperature in cooling mode;
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Startup with low entering water temperature in heating mode;
• Optimized management of compressor load;
• Optimized fan management according to condensing pressure;
• General faults alarm relay;
• Automatic re-start in case of power failure;
• Rapid Restart to recover full load in the shortest possible time for Data Centre application;
• ICM Standard control for multiple units management;
Soft load (optimized management of the compressor load during the start-up);
• Start at high cold heat exchanger water temperature;
• Visualization of:
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cooling and heating entering/leaving water temperature of heat exchangers;
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outdoor ambient temperature;
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condensing-evaporating temperature and pressure, suction and discharge superheat for
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each circuit;
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hours and starts counter for compressors and pumps;
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status safety devices;
Control additional features
• System upgrade with commercial SD cards;
• Save/Restore of configuration parameters with a commercial SD card;
• Ethernet port for remote or local servicing using standard web browsers;
• Daikin on Site connectivity for cloud based

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