Xylem Lowara SM30 Manual De Instalación, Funcionamiento Y Mantenimiento página 44

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Set the delay time at zero (parameter AUX3 IN DELAY in the DIGITAL IN/OUT MENU) of the
minimum pressure switch alarm. With the system under pressure, inhibit pump operation with the
bypass jumpers on the board (see chapter 4.2).
Configure the set to work in automatic mode. Slowly open a drawing point to bring down the pressure
in the delivery manifold. As the pressure lowers, the pump leds will light; the pumps will not start
because operation has been inhibited. When the established pressure value (minimum pressure) is
reached, turn the regulating screw on the minimum pressure switch to modify the threshold of
intervention (turn clockwise to increase the threshold, counter clockwise to decrease it). The lighting
of the red fault led and the respective alarm on the display indicate intervention of the protection
device.
On completing adjustment, reset the CONV.L.SWITCH alarm delay (recommended 20 seconds) in
the parameter AUX3 IN DELAY in the DIGITAL IN/OUT MENU.
6.2.9 NIGHT/DAY FUNCTION
Phas Display
e
0 NIGHT/DAY
1 NIGHT/DAY FUNC. Threshold change enable in N mode (night-
2 NIGHT/DAY
VALUE
3 N/D START HOUR
4 N/D START MIN.
5 N/D END HOUR
6 N/D END MIN.
6.2.10 PROGRAMMING ANALOG INPUTS / OUTPUTS
Phase Display
0 ANALOG. IN/OUT
1 AI1 SENSOR
TYPE
2 ZERO ADJUST
AI1
44
Comment
Only for systems with a sensor
time).
May be disabled by the internal clock, by an
external control connected to AUX3, or by
the Internal Clock or External control.
Decrease value of the pressure SET when
working in N (night) mode. When night-time
operation is enabled, all the thresholds are
decreased by the value set in this
parameter.
The letter N is highlighted at top right of the
display.
Setting of the hour for activating the N/D
change.
Setting of the minutes for activating the N/D
change.
Setting of the hour for deactivating the N/D
change.
Setting of the minutes for deactivating the
N/D change.
Comment
Only for systems with a sensor
Type of transducer connected to the
analog input AI1 (if selected on System)
Visible only if 4-20mA selected.
Acquisition of input zero 4 4-20 mA
Adjustment is possible only in the range
3.5... 4.5mA
If adjustment has a positive result the
message SENSOR ADJUST OK
appears
If out of range the message SENSOR
Field Default
DISABLED DISABLED
INTERNAL
CLOCK
EXT.ON
/OFF
INT.EXT
-FS..0..FS -1.00 bar
Field Default
4-20 mA 4-20 mA
0-20 mA
0-10 V
0-2 V
YES NO
NO