Checks To Be Carried Out Before Commissioning; Operation; General Information - Modine ECO ICN Serie Manual De Uso

- Rust
- soot/ash
- Shavings
- Dust and dirt of all types
The presence of moisture inside the operating fluid could lead to the following consequences:
- Formation of ice in the fittings
- Acidification
- Corrosion
The presence of atmospheric air inside the operating fluid could lead to the following consequences:
- Oxidation
- Chemical reactions between the operating fluid and the refrigeration oil
- Increase of pressure in the system
The other contaminants can cause:
- Acceleration of chemical processes (decomposition)
- Faults on electrical or mechanical parts of the refrigeration system

11.3 - Checks to be carried out before commissioning

Before commissioning, it is essential to check and ensure, according to the following check-list, that the unit is ready
for operation:
- check the tightness of all fittings of the refrigeration system;
- ensure that all screw connections (in particular those on the fans), fittings, electrical connections etc. are in
place;
- all the wiring diagrams included in the documentation must be observed;
- ensure that the wiring is up to standard and that the electrical safety measures are operational;
- check the current absorption of the fans according to what is indicated on the data plate;
- check, and possibly change, the direction of rotation of the fans;
- the power supply line must be adequately protected;
- make sure that all the specified adjustment devices are working properly;
- check that the access and emergency routes are clear and without obstacles.

11.4 - Operation

11.4.1 - General information

A unit cooler is a component of a refrigeration system which transfers heat from the air to a coolant. The role of
the unit cooler is to act as a heat exchanger, in which the coolant evaporates, absorbing heat from the air (the
element to be cooled). Through integrated fans, the air is mechanically distributed on the surface of the heat
exchanger, i.e. on the entire outer surface of the unit cooler.
The coolant is the fluid used in a cooling system for the exchange of heat. The fluid absorbs heat at a low tem-
perature and low pressure, and transfers it at high temperature and high pressure, changing its state.
In the standard version, the unit coolers of the ICN series work according to the
principle of '"flooded evaporation": the amount of coolant transferred to the evaporator is equal to a multiple of
the amount needed for complete evaporation (value between two and five times). The inflow of the coolant is
achieved by means of coolant pumps (with forced circulation) or by force of gravity (circulation by force of gra-
vity).
Both operating modes require a liquid separator. This separates the coolant liquid-vapour mixture thus allowing,
on the one hand, that only pure coolant vapour reaches the compressor; on the other hand it allows a safe trans-
fer of boiling coolant to the unit cooler (by means of a pump or by force of gravity).
Ammonia (NH3)" is a class L2/B2 coolant.
!
The coolant circuit is not integrated in the unit.
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