Rev. 3 02-2021
13
DXi.H/DXi.HF - 39 - 0 - U
MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English
Emibyte DXi.H/DXi.HF
Direct expansion close control
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Thanks to the double coil (Freecooling water and Direct Expansion) the unit provides the highest saving match with full availability of the
DX solution.
The usage of Free cooling coil and the BLDC Inverter compressor allows maximizing the saving in mixed mode operation, so whenever the
freecooling is not able to fully take the load the compressors can work just to complete the missing cooling needs.
Therefore Emicon DXI-HF can provide extremely high energy saving granting the highest availability of the application.
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The unit electrical board is in compliance with the European regulations in force and has been realised inside a metal compartment:
The main characteristics are the following:
• Three phase power supply 400/3/50+N+PE on all units, unless different special requests are demanded;
• Auxiliary circuit in low voltage 24Vac with isolation transformer;
• Main switch (mechanical interlock is an optional);
• Terminal board for signal and control free contacts;
In this compartment, which axcess is allowed by a main switch, contains moreover the following main devices:
• Contactors;
• Transformers;
• Numbered conducers;
• Low tension auxiliary circuits;
• Terminal boards;
• Electronic cards to manage and control.
All units undergo a safety cycle with continuity test on protection conductors, insulation resistance and wihtstanding test. The unit control is
managed by controller program installed on the Microprocessor onboard.
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The plate heat exchangers are brazed plate type, asymmetrical channels, and made of AISI 316 stainless steel.
The use of this type of exchangers reduces the refrigerant gas charge of the unit in comparison with standard models, allowing a reduced
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material.
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The unit manage electronic controller is installed in the electrical board and it has the cooling capacity regulation control through the air
temperature measure (evaporator inlet-outlet double check), operation parameters check, equalizer and hour counte (options), troublesho-
oting autodiagnosys, alarm log memorization, switch on time and set point value programming, remote control of the unit using the standard
communication protocols installed in the Microprocessor.
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All the models are provided with an inverter able to manage the compressors with permanent brushless magnets BLDC.
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Once the uniti s complete, the cooling circuiti s completely tested (following the Manufacturer Warraty procedures) to a pressure and leak
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Before the delivery the unit is subjects to a complete functional test.
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Following is shown the unit name meanings:
Air direction:
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Unit size
N° cooling circuits
DXi.H= inverter compressor
DXi.HF= inverter compressor
free-cooling
coil
