Xylem Fixed speed booster sets programming manual/Electronic control board SM30 - Manual (Page 40)

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6.2.2 PUMP START/STOP THRESHOLDS 6.2.2 PUMP START/STOP THRESHOLDS 6.2.2 PUMP START/STOP THRESHOLDS 6.2.2 PUMP START/STOP THRESHOLDS
Note: The THRESHOLDS parameters can be set only with a system with a pressure or level sensor.
The thresholds must be set considering the hydraulic performances of the pump (curve Q-H) and of the
type of system.
Phase Display Comment Field Default
0 0 0 0 THRESHOLDS THRESHOLDS THRESHOLDS THRESHOLDS Application with pressure / level Application with pressure / level Application with pressure / level Application with pressure / level
1 P1 STOP THRESH.
Stop (OFF) threshold (pressure/level) for
pump 1
0.. FS +3.50 bar
2 P1 START THRESH.
Start (ON) threshold (pressure/level) for
pump 1
0.. FS +2.70 bar
3 P2 STOP THRESH.
Stop (OFF) threshold (pressure/level) for
pump 2
0.. FS +3.40 bar
4 P2 START THRESH.
Start (ON) threshold (pressure/level) for
pump 2
0.. FS +2.60 bar
5 P3 STOP THRESH.
Stop (OFF) threshold (pressure/level) for
pump 3
0.. FS +3.30 bar
6 P3 START THRESH.
Start (ON) threshold (pressure/level) for
pump 3
0.. FS +2.50 bar
6.2.3 PUMPS STARTING ROTATION
6.2.3 PUMPS STARTING ROTATION 6.2.3 PUMPS STARTING ROTATION 6.2.3 PUMPS STARTING ROTATION
Phase Display Comment Field Default
0 0 0 0 PUMPS ROTATION PUMPS ROTATION PUMPS ROTATION PUMPS ROTATION
1 PUMPS ROTATION Enable pump rotation.
Set YES to activate pump rotation. Automatic
pump rotation takes place each time the set is
restarted after stopping in automatic mode.
The jockey pump, if present, is not subject to
rotation, so it always starts first.
YES
NO YES
2 PUMP SEQUENCE Insert the duty pump that you want to start
first after electrically switching on the set.
In systems with a jockey, as this is P1, the first
duty pump that can be set can only by P2 or
P3. P1
P2
P3 P1
3 SWITCH INTERVAL If automatic pump rotation does not take place
(the set has never been able to stop), after the
set time a “forced” rotation of the duty pumps
is performed (excluding the jockey).
To disable this function set 0h 0 h
1÷12 h 0 h
NOTE: The jockey pump, if present, is not subject to rotation and is started first, it remains on when the
duty pumps start and it switches off last.