Xylem Fixed speed booster sets programming manual/Electr Manual do Utilizador descarregar pdf (Página 40)

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6.2.2 PUMP START/STOP THRESHOLDS

6.2.2 PUMP START/STOP THRESHOLDS6.2.2 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

THRESHOLDS

THRESHOLDSTHRESHOLDS

THRESHOLDS Application with pressure / level

Application with pressure / levelApplication 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 ROTATION6.2.3 PUMPS STARTING ROTATION

6.2.3 PUMPS STARTING ROTATION

Phase

Display Comment Field Default

PUMPS ROTATION

PUMPS ROTATIONPUMPS 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

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.

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.

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