2- Fan Features; Motor-Condensing Section; 1- Heat Transfer Coil; 2- Fan Features (Condensing Temperature Control With Variex, Variable Fan Speed) - Liebert Hisp SE+SC04 Product Documentation

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1.6.2 - Fan features
The standard SE units are equipped with two centrifugal fans with forwardly bladed impellers and housing
in deep galvanized steel plate. One electrical motor is directly coupled on the motor shaft, with internal
thermal protection. The impellers are statically and dynamically balanced with lifetime lubricated bearings
for quiet, vibration-free operation.
The motor is single-phase, IP44.
If the unit is complete with the Emergency Freecooling option, the evaporating fan section is composed
by two free wheel fans (backward curved blades), each of them direct driven by a dc electric motor.
1.7 -

Motor-condensing section

1.7.1 - Heat transfer coil
A wide face air condensing coil is provided. It is designed in copper tubes with aluminium fins and sized
to allow operations up to 45 C outdoor air temperature.
1.7.2 - Fan features (condensing temperature control with Variex, variable fan speed)
The units are equipped with 4-pole axial fan. The electrical motor is directly coupled on the motor shaft,
with internal thermal protection and IP44. The innovative design of the impeller allows the maximum effi
ciency with the minimum noise.
As standard, the condensing fan speed is smoothly regulated by Variex control, in order to maintain
constant the condensing pressure and therefore the temperature. Two kind of advantages: higher reliabil
ity for less start/stops of the compressor, and lower noise disturbance because the fan is running at a lower
speed, mainly during night time, and with less discontinuity.
1.8 -

Air filter section

The filter section is placed vertically, before the evaporating coil and provides filtration of the recirculated
or the fresh air to obtain the required degree of air cleanliness in the room. The filter can be removed from
the bottom of the unit (indoor side) by simply opening the relevant panel and unlocking the support brack
et. Hisp SE unit features 48 mm (SE 04-05-06), 60 mm (SE 08-10-14) thick, pleated type air filter, spe
cially designed to minimize the pressure drop and improve the efficiency. The standard filter class is EU3,
according to Eurovent EU4/5 standard).
1.9 -

Electric board

The electrical board of the indoor SE unit is housed in a compartment isolated from the air stream and
closed by a screwed dedicated panel. Power connections and auxiliary wires can be driven on right or
left side, through two couples of dedicated opening, to increase the flexibility during the installation.
The electrical board is built in accordance with IEC 204-1 recommendations.
The units are designed for the following power supply:
S 230 V
S 400 V
S 230 V
S 230 V
S 460 V
One circuit breaker with magnetic and thermal protection against short circuits and current overload is
supplied for the electrical apparatus. A single phase transformer for power supply to the 24 V to the elec
tronic control and to a secondary circuit is provided for maximum safety. Automatic restart is provided after
a power failure.
The outdoor SC unit receives main power supply from the indoor unit, together with the control signals
collected in a dedicated weather-proof terminal block.
4
1 ph 50 Hz (SE+SC 04-05-06)
3 ph 50 Hz (SE+SC 08-10-14)
1 ph 60 Hz (SE+SC 04-05-06)
3 ph 60 Hz (SE+SC 08-10-14)
3 ph 60 Hz (SE+SC 08-10-14)
Hisp
Reliability
Air Purity
Power Supply with Safety