Sabiana ENY-SP-180, Техническое руководство

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ENY-S units can be equipped with an automatic flow rate control device. The calibration system of standard units consists in a
manual balancing operation performed by the responsible technician, using a digital pressure gauge. After the first calibration,
the unit control board is programmed to maintain the nominal and partial flow rate close to the desired value through fan speed
control (indirect flow rate control method). Alternatively, an advanced control strategy is envisaged, enabling automatic flow
rate calibration and maintaining it thanks to the action of differential pressure switches connected to the suction nozzles of the
centrifugal fans. The pressure drop measured by this type of sensors is directly related to the flow rate of the fans, so that it can
be considered as a direct flow rate measurement. If the units are equipped with accessory transmitters, the main control board
detects the actual system flow rates at all times, making it react automatically to maintain the desired actual values.
ACCESSORIES
Type Code
ES-DP 9021200
Elettroventilatore Elettroventilatore
Main power
board
Main by-pass
damper motor
Secondary
by-pass
damper
motor
Electric pre-heater
Supply fan Extract fan
Heat recovery
system
ΔP ΔP
Automatic control system
operating diagram
Pressure sensor for automatic control of ES-DP flow rates
(standard on ENY-SP, not available on ENY-SHP units)
Below are the main benefits of installing an automatic flow rate control system on the units:
Topic Benefits
The flow rate calibration is
much easier The system simply asks for the desired flow rate value and configures it automatically with-
out any further intervention. No pressure gauges are required.
The flow rate is not affected
by filter clogging Without the automatic flow rate control system, failure to periodically replace the filters
leads to an inevitable reduction in the flow rate that the unit manages to deliver.
The system with direct measurement of the exchange flow rate through pressure transduc-
ers ensures that the flow rate stays constant regardless of the extent of filter clogging.
The filters should however be replaced regularly according to the rules recommended in
this brochure (see "Conformity Table with Regulations EU 1253/14 and EU 1254/14"), since
in any case filter clogging leads to a significant increase in the electric power consumption
of the unit and does not guarantee the best hygienic standards.
The automatic flow rate control system is compatible with the “AUTO” variable flow modes.