18
Pressure Management Application Settings
BERMAD’s pressure management by time application is based on
BERMAD control valve equipped with two pressure reducing pilots:
one for high pressure setting and the other for low pressure setting.
Normally the high pressure pilot controls the valve, while the low
pressure pilot is on standby mode. A BEC PM1 controller with a DC
solenoid can switch the high pressure pilot with the low pressure
pilot according to a pre-defined time based operation regime. Such
arrangement can switch the system to low pressure settings during
night, while maintaining high pressure during day time.
The system is also equipped with a high flow switch that can stop
the low pressure regime when higher demand for water is detected,
such as in case of fire.
The following chapter describes the programming steps required for
setting-up this application:
Programming the Pressure Management
by Time Intervals Application
The BEC PM1 operation programs consist of three parameters per
each valve program: Operation Time, Operation Days, and Start Time.
For controlling BERMAD’s Pressure Management by Time Interval
Application the controller is supplied with a single solenoid (valve),
operated by time with up to three start times a day, and with a flow
switch.
In municipal water systems the demand for water in residential
neighborhoods is high during the mornings and evenings and low
during the night and mid-day hours; therefore, the control valve is
set for the high pressure during high demand hours.
Operating the valve with the BEC PM1 controller reduces the
otherwise too high pressure settings during the low demand hours.
