26
We reserve the right to make changes without any prior notice.
Translation from original instructions
5.3 Control and safety devices
The unit is integrally managed by an electronic microprocessor control that, through the various temperature and pressure
sensors installed in the unit, keeps its operation within the safety limits.
All the parameters involved with control of the unit are shown in the “Control Manual” that is an integral part of the docu-
mentation of the unit.
The manual fully describes the logic with which the checks of the unit take place during the various operating stages.
The devices are shown in the Technical Catalogue.
5.4 Principles of operation
The principle of these units is based on using the vapour compression refrigeration cycle, characterized by 4 phases (com-
pression, condensation, throttling and evaporation).
This cycle produces the transfer of heat from a fluid at lower temperature to a fluid at higher temperature, which is the op-
posite of what happens naturally.
In this specific case, these units consist of a refrigerant circuit that cools the water of a hydraulic circuit inside a heat exchan-
ger (“evaporator”) and rejects the heat through another water heat exchanger (“condenser”).This happens in units intended
for operation in cooling mode.
In units in heat pump operation, where hot water is produced, there is refrigeration cycle reversal that reverses the function
of the two heat exchangers, so that the evaporator becomes a condenser and vice versa.
In "LC" version units, the same functionalities made by the heat exchanger connected to the source hydraulic circuit are
made by a remote air heat exchanger.
In "LE" version units, the same functionalities done by the heat exchanger connected to the user hydraulic circuit are done
by a remote air heat exchanger.
5.5 Structure
The structure is made of epoxy polyester powder coated sheet metal, with removable panelling lined with sound absorbing
material.
For sizes 6, 8 and 11 of units in LN set-up, standard sound absorbing material is replaced with multilayer acoustic insulation
that is sound absorbing and soundproofing.
For sizes 16 to 48, this set-up includes insertion of a soundproof casing on the compressor. This set-up can be combined
with all the aforesaid versions of the unit.
Sizes 6, 8 and 11 are prepared for wall mounting, sizes 16 to 48 are prepared for floor mounting.
5.6 Specifications
Water-condensed water chiller unit with hermetic scroll compressor, condenser and dry-expansion plate evaporator.
