Metal Cabinet; Refrigeration Circuit; Evaporating Section; 1- Heat Transfer Coil - Liebert Hisp SE+SC04 Product Documentation

English
1.4 -

Metal cabinet

Hisp frame consists of riveted steel panels, treated with powder coating colour as standard (RAL7035).
The motor-condensing unit is designed to be installed outdoor and resist to worst weather conditions.
The screws are hermetic (special rubber gasket as standard) and antivandalism (they can be removed
only with specific tools) and allow the opening from the front.
The evaporating unit SE has to be placed indoor, to supply the conditioned air inside the room or shelter:
it's available in basic version (without Freecooling option) with smaller footprint, and in Freecooling ver
sion, inclusive of the additional module for the fresh air modulating management. The air inlet is located
in the rear panel (basic version, without Freecooling option), and the air supply is done from the front sec
tion, through an integrated grille, complete with double row of orientable fins (horizontal and vertical set)
as standard.
The thermo-acoustic insulation of the panels is 10 mm thick, density 70 kg/m
wool.
The motor-condensing unit SC takes the external air from the rear, to discharge it on the front section:
a frontal metal safety grid prevents contact with the fan, and a special design of the front panel avoids
damaging of the fan motor.
The compressor is located in the left side of the motor-condensing unit, separated from the air flow.
1.5 -

Refrigeration circuit

There is a single refrigeration circuit with a hermetic compressor (rotary on SC04, 05, 06 models; scroll
on SC08, 10, 14).
An internal thermal protection against overheating of the motor is provided as standard.
The circuit, for SE+SC04, SE+SC05 and SE+SC06, incorporates a capillary tube which controls the re
frigerant flow to the evaporator (SE unit); a filter dryer is provided in the liquid line to eliminate all moisture
for maximum efficiency and an increased working life.
On SE+SC08; SE+SC10 and SE+SC14 the circuit is equipped with thermostatic valve and sight glass.
The compressor is equipped with two pressure switches for protection against high condensing (HP) and
low evaporating (LP) pressures. The low pressure switch features automatic reset and a delay for winter
operation, whilst to avoid compressor cycling at high discharge pressures. The high pressure switch is
equipped with manual reset for safety reasons.
1.6 -

Evaporating section

1.6.1 - Heat transfer coil
This consists of a slab coil in copper tubes with aluminium waved fins and with a large face area so as
to increase the SHR (Sensible Heat Ratio) and optimise the EER (Energy Efficiency Ratio); this is achieved
by reducing the air pressure drop and turbulence and increasing the evaporating temperature, thus the
efficiency, of the compressor. A galvanized steel basin is provided for the drainage water: its special design
allows safe operations indifferently in horizontal or vertical position.
2
Hisp
Compactness
3
and of the type mineral
Efficiency
Cooling capacity