It is the result of long experience and design-specific research. The article is made of the highest quality materials and incorporates cutting-edge technology. In addition, all our products bear the EC mark, indicating that they meet the requirements of the European Machinery Directive in terms of safety. The data may at any time undergo changes deemed necessary to improve the product, without obligation to any notice thereof.
In case of improper use, risks can still arise for the safety of the user or third parties, or even damage to the devices and other objects. Provide the following installation instructions with all additional documentation to the user of the device, who is responsible for retaining the instructions so that they are always available when needed. The warranty of the device does not in any case cover the costs incurred as a result of motorized ladders, scaffolding or other lifting systems necessary to carry out the work under warranty.
This unit is not intended for use by persons (including children) with any physical or mental disabilities or any sensory impairment, nor by persons with a lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the unit by a responsible person. for their safety. It is forbidden to touch the unit with wet body parts and bare feet.
Warnings on the documentation
Intended use
WSH AERMEC refrigerators are manufactured in accordance with technical standards and recognized safety regulations. These units have been designed and manufactured for refrigeration and must be used accordingly and in consideration of their performance characteristics.
Conservation of the documents
Essential safety rules
Product identification
Unit description
Versions available
Available versions
Configurator
Description of components
- Refrigerating circuit
- Frame
- Safety and control components
- Electrical components
- Electronic regulation
Of the mechanical type made of ceramic and hygroscopic material that can collect impurities and any traces of moisture in the cooling circuit. Thermostatic valve (economiser) Mechanical type valve with external equalizer on the economiser outlet, on the compressor inlet to improve performance. Factory calibrated, it is located on the high pressure side of the refrigeration circuit, it shuts down the compressor operation in case of abnormal operating pressure.
It makes it possible to display the value of the compressor inlet pressure (one per circuit) on the microprocessor board display. Placed on the low pressure side of the refrigeration circuit, it shuts down the compressor operation in the event of an abnormal working pressure. It makes it possible to display the compressor discharge pressure value (one per circuit) on the microprocessor board display.
Located on the high pressure side of the refrigeration circuit, it shuts down compressor operation in the event of abnormal operating pressure. Hot gas injection device upstream of the evaporator, fitted on the versions with partial or total heat recovery.
Accessories
The PDC "Pull Down Control". system to prevent the power steps from being activated when the water temperature quickly approaches the set point. It optimizes the operation of the machine, both in normal operation and under varying loads, ensuring top machine efficiency in all situations. electrical standard RS 485 and MODBUS type protocol. ROMEO The ROMEO device allows remote control of the chiller from a regular mobile phone with WAP browser. It also allows sending an alarm and pre-alarm SMS to up to three GSM mobiles, even if they are not equipped with WAP. browser.
The accessory AER485P2 must be added to this kit. ONLY on the 400V - 3 - 50 HZ VERSION) (1) Parallel connection with the motor enables the reduction of input current. MULTICHILLER Control system to control, switch on and off the individual chillers in a system in which several units are installed in parallel. Hood of the machine optimized by high-density lead-free materials that enable further reduction of vibrations.
Sound power The Aermec sound power value is determined on the basis of measurements carried out in accordance with the ISO 9614-2 standard, in accordance with the requirements of the EUROVENT certificate.
Technical data
Operational limits
Design date dir 97/23/ce
Corrective factor
- Cooling capacity and input power
- Heating capacity and input power
- For ∆t different from the rated value
- Fouling factors
The heating capacity delivered and the input electrical power in conditions other than rated conditions are obtained by multiplying the rated values (Pf, Pa) with the respective correction coefficients (Cft, Cpa). The following diagram makes it possible to obtain the corrective coefficients; corresponding to each curve, the temperature of the hot processed water referred to is reported, assuming a difference in water temperature between the input and output of the condenser equal to 5°C. For ∆t different from 5°C to the evaporator refer to Tab.9.3.1 for cooling capacity and input power correction factors.
The performances provided by the table refer to the conditions of clean pipes with fouling factor = 1. For values different from the fouling factor, multiply the values in the performance table by the reported coefficients. The cooling capacity and input power correction factors take into account the presence of glycol and the different evaporation temperature.
The pressure drop correction factor now takes into account the different flow rate resulting from the application of the water flow rate correction factor. The water flow rate correction factor is calculated to maintain the same Δt as it would have without glycol. To make the chart easier to read, an example is provided on the next page.
The required percentage of glycol can be determined on the basis of the diagram below; this percentage can be calculated. Based on the liquid under consideration (water or air), it will be necessary to enter the graph from the right or left side, from the intersection of the straight lines of the outside air temperature or the temperature of the processed water and the relative curves , a point is obtained through which the vertical line must pass identifying both the percentage of glycol and the relative correction coefficients. The curves shown in the figure sum up a significant amount of data, each of which is represented by a specific curve.
If you want to calculate the percentage of glycol based on the outdoor temperature, it is necessary to enter from the left axis and once the curve is cut, draw a vertical line that will intersect everything. the other curve in turn;. If you want to calculate the percentage of glycol based on the processed water temperature, it is necessary to start from the.
Ethylene glycol solution
How to read glycol curves
If you want to calculate the percentage of glycol based on the temperature of the processed water, it is necessary to enter from. the axis of the right arm, and after the curve has been cut, draw a vertical line which will cut off all other curves on its side; The points taken from the upper curves represent the coefficients for cooling capacity and power input, for flow rate and pressure drop. remember that these coefficients must still be multiplied by the nominal value of the quantities examined); while the bottom axis advises the percentage of glycol needed to produce water at the required temperature. PROCESSED WATER TEMPERATURE", are not directly related to each other, therefore it will not be possible to enter the curve of one of these quantities and obtain the corresponding point on the other curve.
Pressure drop
Evaporator pressure drops in cooling operation
Condenser pressure drops in cooling operation
Sound data
Sound power
Sound pressure
Control and safety parameters setting
Compressor magnetothermal switch 400v
Compressor thermal cut-out
Compressor fuses note
Double high pressure switch
High pressure transducer
Low pressure transducer
Refrigerator circuit safety valves
Dimensions
Dimensional tables
Weights and centre of mass
Percentage distribution of weights on supports
Handling
Instructions for lifting
Safety warnings and regulations of installation
Safety warnings
Selection of the installation location
Positioning
Hydraulic circuit
WSH internal hydraulic circuit
WSH external hydraulic circuit (not supplied)
Position of hydraulic connections
Standard version (°)
Quiet operation version (L)
Desuperheater version (D)
Low noise with desuperheater version (DL)
Electrical connections
Electrical data
Putting into service
Preparation for commissioning
Commissioning
System discharge
Maintenance
Maintenance warnings
Extraordinary maintenance
Disposal
Disconnecting the unit
Improper uses
Important safety information
