Lowara SM30 BSETF3 Instrucciones Para La Instalación Y El Uso página 44

en
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
To interrupt the autotest, press the button P3 (ESC).
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
0 COMPENSATION
1 COMP.THRESHOLD
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.
LOWER
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 relay is available and programmable only and exclusively if the AUTOTEST function has not
been enabled.
If AUTOTEST is enabled, the parameters described below will not be displayed.
44
Comment
Available only with systems with a
pressure sensor
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.
UPPER
SUP
INF
1 pump
1 pompa
ON
ON
Variable thresholds to compensate load losses
Soglie variabili per compensazione perdite di carico
Increase
Incremento
2 pumps
3 pumps
2 pompe 3 pompe
ON
ON
Field
000.00 bar
ON
ON
Default
000.00
bar