Sabiana ENY-SP-180, Technical Manual

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Energy Smart |
VERSIONS WITH FITTED ELECTRIC HEATERS
When installing in regions with particularly harsh climatic conditions, the units must be equipped with a pre-heating coil to
prevent freezing phenomena on the discharge air outlet side. The electric heater can be installed on the fresh air intake section,
see the next dedicated paragraph, or, only for the units from size 170 to size 600, the version with electric heater fitted on the unit
(E version) is available. In this case the electric heater is fitted within the ventilation unit, near the fresh air inlet section.
If the fresh air temperature drops below the default limit, resulting in the risk of the counterflow heat exchanger freezing, the
electric heater is switched on and the thermal power is adjusted continuously in order to maintain the discharge air temperature
within the desired range.
The electric heater is sized so as to ensure internal thermal comfort up to an outside temperature of -10 °C and is
designed to prevent the effects of frost while the temperature remains above -15 °C. The units are kept in normal operating
conditions until the supply air temperature drops below 5 °C or until the outside temperature drops below -20 °C; when these
limits are exceeded, the machine is switched off for antifreeze emergency reasons ("Frost" alarm).
The electric heater is fitted with a safety thermostat that turns off the unit in case of uncontrolled heating. In case the electric
heater does not start up, instead, the unit will turn off if the supply air temperature falls below 5 °C.
ENY-SP and ENY-S vertical version
Model W
ENY-SP-180 500
ENY-SP-280 900
ENY-SP-370 1250
ENY-SP-460 1600
ENY-SP-600 2000
ENY-S-170 500
ENY-S-270 900
ENY-S-360 1250
ENY-S-460 1600
ENY-S-600 2000
ENY-SHP horizontal and vertical version
Model W
ENY-SHP-170
600
ENY-SHP-270