8.4 Connection of the alarm outputs
If alarms occur, this is indicated by the E.box in three ways:
With the leds on the front panel, which give a number of blinks depending on the error.
With the outputs Q1, Q2, Q3 which short circuit as specified in Table 17. The operating logic of the alarms is
as follows: Q1 closes following malfunctions of pump 1, Q2 of pump 2 and Q3 for general errors.
With the indications on the display (if present). In this case it is also possible to see the alarm log.
If the panel is not fed, Q1, Q2 and Q3 are closed, so they give an alarm signal.
8.5 Operation with pressure sensor (recommended choice)
It is recommended to use this operating mode, rather than pressure switches, because it allows greater flexibility in
managing the system, the pressure distributed by the set can be seen, and installation is easier. In this case it will be
possible to set the Set Point pressure and the pressure differential for the restarting and stopping of the pumps.
8.6 Connection of the pressure sensor
The pressure sensor must be connected to the terminal board, see Figure 46, according to the following diagram:
8.7 Operation with pressure switches
If you decide to operate the booster set with pressure switches, they must be connected on the delivery of the booster
set. The pressure switches to be used are B and C and they are connected as indicated in the next paragraph.
8.8 Connection of pressure switches
The pressure switches must be connected to the contacts B and C of the terminal board shown in Figure 47.
ENGLISH
Figure 45: Thermal protection inputs KK
Terminal
11
12
101
Pressure sensor connections
4 – 20mA
Cable to be connected
- OUT/GND (brown)
+VCC (white)
Figure 46: Connection of the pressure sensor