DAB MCE/C Series, Instruction For Installation And Maintenance

Page: 53 / 220

ENGLISH
52
7. FUNCTIONS
7.1 Regulating Modes
MCE-22/C systems allow use of the following regulating modes:
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Regulation with constant differential pressure (factory setting).
−
Regulation with constant curve.
−
Regulation with constant curve with speed set by external analogue signal.
−
Proportional differential pressure regulation depending on the flow present in the plant.
7.1.1 Regulation with Constant Differential Pressure
The head remains constant, irrespective of the water request.
This mode may be set by means of the control panel on the cover of the
MCE-22/C (see par. 9 – Page 2.0).
7.1.2 Regulation with Constant Curve
The rotation speed is kept at a constant number of revolutions. This rotation
speed may be set between a minimum value and the rated frequency of the
circulation pump (e.g. between 15 Hz and 50 Hz).
This mode may be set by means of the control panel on the cover of the
MCE-22/C (see par. 9 – Page 2.0).
7.1.3 Regulation with Constant Curve with External Analogue Signal
The rotation speed is kept at a constant number of revolutions in proportion to
the voltage of the external analogue signal (see par. 5.5.2). The rotation speed
varies in linear mode between the rated frequency of the pump when Vin = 10V
and the minimum frequency when Vin = 0V.
This mode may be set by means of the control panel on the cover of the
MCE-22/C (see par. 9 – Page 2.0).
7.1.4 Regulation with Proportional Differential Pressure
In this adjustment mode the differential pressure is reduced or increased as the
water request falls or rises.
This mode may be set by means of the control panel on the cover of the MCE-
22/C (see par. 9 - Page 2.0).
H
Q
Max.
Min.
H
Q
Max.
Min.
H
Q