Xylem Fixed speed booster sets programming manual/Electronic control board SM30 - Manual (Page 43)

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When the autotest has failed When the autotest has failed When the autotest has failed When the autotest has failed
If during the autotest (whatever pump is operating) the minimum pressure switch (CONV.L.SWITCH)
installed on the set trips, the autotest is definitively interrupted and the set resumes working in automatic
mode.
The display shows the message AUTOTEST FAIL P#.
CONV.L.SWITCH intervention is delayed by the time set on the parameter AUX3 IN DELAY.
How to interrupt the autotest
How to interrupt the autotest How to interrupt the autotest How to interrupt the autotest
To interrupt the autotest, press the button P3 (ESC).
6.2.6 LOAD LOSS COMPENSATION 6.2.6 LOAD LOSS COMPENSATION 6.2.6 LOAD LOSS COMPENSATION 6.2.6 LOAD LOSS COMPENSATION
Sometimes in the systems there is a fall in pressure caused by load losses along the pipes and these
increase when the required water flow increases.
Phase Display Comment Field Default
0 0 0 0 COMPENSATION COMPENSATION COMPENSATION COMPENSATION Available only with systems with a
pressure sensor
1 COMP.THRESHOLD
Enable load loss compensation with
increase of the start and stop thresholds
in bar for the pumps after the first.
Setting pressure = 0 bar disables the
function. 000.00 bar 000.00
bar
To compensate system load losses it is possible to enable a control that supplies a pressure proportional
to the load. A direct measurement of the flow is not taken, but it is believed that it is proportional to the
number of pumps running.
When each duty pump after the first is started, the UPPER and LOWER thresholds are increased by the
value indicated in the COMP. THRESHOLD parameter.
The jockey pump is excluded.
SUP
INF
1 pompa
ON
2 pompe
ON
3 pompe
ON
Incremento
Soglie variabili per compensazione perdite di carico
6.2.7 PROGRAMMING THE ALARM RELAY 6.2.7 PROGRAMMING THE ALARM RELAY 6.2.7 PROGRAMMING THE ALARM RELAY 6.2.7 PROGRAMMING THE ALARM RELAY
The SM30 BSETF3 board has an output alarm relay which is activated as described below for the
following types of alarms:
The alarm rel The alarm rel The alarm rel The alarm relay is available and programmable only and exclusively if the AUTOTEST function has not ay is available and programmable only and exclusively if the AUTOTEST function has not ay is available and programmable only and exclusively if the AUTOTEST function has not ay is available and programmable only and exclusively if the AUTOTEST function has not
been enabled. been enabled. been enabled. been enabled.
If AUTOTEST is enabled, the parameters described below will not be displayed. If AUTOTEST is enabled, the parameters described below will not be displayed. If AUTOTEST is enabled, the parameters described below will not be displayed. If AUTOTEST is enabled, the parameters described below will not be displayed.
Increase
1 pump
ON
2 pumps
ON
3 pumps
ON
Variable thresholds to compensate load losses
UPPER
LOWER