Pressurisation Function; Operation With Sensor; Operation With Pressure Switches - DAB E-BOX 2G M Mode D'emploi

11. PRESSURE BOOSTER FUNCTION

11.1 Operation with sensor

Operation with a sensor allows 2 types of regulation:
Regulation with Standard expansion vessel = 19 litres each pump (DS_A1=ON).
Regulation with Additional expansion vessel = over 100 litres (DS_A1=OFF).
Regulation is obtained by turning the trimmers SP (system pressure) and DP (differential pressure).
Sequence
START System pressure = < SP
STOP System pressure > = SP+DP
Sequence
START System pressure = < SP
STOP System pressure > = SP+DP

11.2 Operation with pressure switches

The pressure switches of the pumps P1 and P2 must be connected to the respective terminals B and C.
START
STOP
N.B. The indications pump P1 and P2 and the references B and C are only indicative.
Example of Regulation with Standard expansion vessel and Regulation with Additional expansion vessel
SP= 4 bar (starting pressure P1)
DP = 50% of the value of SP = 1/2 (differential pressure)
Regulation with Standard expansion vessel
H
DP
SP
4
DP ½
P1
ON
N.B. The indications pump P1 and P2 are only indicative.
Regulation with Standard expansion vessel
Pump P1
Regulation with Additional expansion vessel
Pump P1
Sequence Pump P1
Pressure switch B = ON
Pressure switch B = OFF
6 6
4
3
P1
P2 P1 e P2
P1
ON
OFF ON OFF
ENGLISH
Pump P1 = started.
Pump P2 = starts with System Pressure = < SP – ½ DP
Pump P1 = stopped.
Pump P2 = stops with System Pressure > = SP+DP.
Pump P1 = started.
Pump P2 = starts with System Pressure = < SP – 2%
Pump P1 = stopped.
Pump P2 = stops with System Pressure > = SP+DP.
Pressure switch C = ON
Pressure switch C = OFF
Regulation with Additional expansion vessel
H
DP
SP
4
t
P1
ON
46
Pump P2
Pump P2
Pump P2
6
4
3,9
P1 P2
P1
ON ON
OFF
6
t
P1 e P2
OFF