Protections And Alarms - DAB ACTIVE SYSTEM Instructions De Mise En Service Et D'entretien

Regulation of sets of 2 pumps
Attention!
The Start Pressure is always regulated by the MASTER pump.
Instead the Stop Pressure is always regulated by the SLAVE pump for the whole Set.
The Start Pressure can be regulated with the regulating Trimmer (see paragraph 5.2 - ref.1) on the front control panel, located on
the cover of the Active System of the MASTER pump.
Instead the Stop Pressure is regulated with the regulating Trimmer (see paragraph 5.2 - ref.1) on the front control panel, located on
the cover of the Active System of the SLAVE pump as a percentage (between 10% and 55%) of the Start Pressure value set on the
Master pump.
The Master pump will start when the pressure in the system is ≤ than the set Start Pressure.
Instead the Slave pump will start when the pressure in the system is equal to the value of the Start pressure minus half the DP
value (Difference in Pressure between the stop pressure and the start pressure of the set).
For example, if the Start pressure is 4 bar, the Stop pressure is 6 bar and the DP value is 2 bar, the Slave Pump will start when the
pressure reaches 3 bar:
(P.Stop 6bar – P.Start 4bar)= DP 2bar
(DP 2bar : 2) = DP ½ 1bar
Slave pump Start pressure =
(P.Start 4bar – DP ½ 1bar) = 3 bar
Master pump Start pressure = 4 bar
Master and Slave pump Stop pressure = 6 bar
(+ 50% of the Start pressure value)
DP 1/2 = 1 bar
Slave pump Start pressure = 3 bar

10. PROTECTIONS AND ALARMS

The protections and alarms are indicated on the front regulation and control panel located on the cover of each pump by the lighting of the
respective leds and at a distance by the optional relay only in the Pressure and flow switch and Pressure boosting function.
General table of alarms and signals
FRONT REGULATION AND CONTROL PANEL
Alarm name
Overpressure Alarm
External input alarm
(possibility of remote signalling - NO RWS)
Dry operation alarm
(possibility of remote signalling - NO RWS)
Anticycling alarm
Dip-switch Incoherence alarm
Communication absent alarm in Sets of 2 pumps
(possibility of remote signalling - NO RWS)
Dry operation alarm over 15 hours for single pump
Dry operation alarm over 4 hours for Sets of 2 pumps
Led lit with fixed light
Led lit with blinking light
Indicates the number of blinks made by the warning led.
ENGLISH
H
P.Stop
P.Start
4
DP ½
Master
ON
Signal name
Card supplied
without flow
Card supplied
with flow
Antifreeze function
Single Active
System function
Master Communication
Slave Communication
22
6 6
4
3
Master e Slave
Master
Master
ON OFF
OFF
Slave
ON
t
off