Xylem LOWARA e-SVE - Page 38

en – Original instructions
38
P31
Ramp 4 [1÷999]
s
Adjustment of the slow deceleration time (also see Par. 6.6.2).
Other characteristics: as for Ramp 3.
P32
Ramp Speed Min
Acceleration
[2.0÷25.0]
s
This parameter sets the fast acceleration time.
It represents the acceleration ramp used by the controller until the
minimum speed of the pump is reached (P27).
It affects the control of the pump for HCS, MSE and MSY control
modes (also see Par. 6.6.2).
Default: 2.0 s.
P33
Ramp Speed Min
Deceleration
[2.0÷25.0]
s
This parameter sets the fast deceleration time.
It represents the deceleration ramp used by the controller for stopping
the pump once the minimum speed of the pump is reached (P27).
It affects the control of the pump for HCS, MSE and MSY control
modes (also see Par. 6.6.2).
Default: 2.0 s.
P34
Speed Min
Configuration [STP,
SMI]
This parameter defines the operation of the controller once the
minimum speed of the pump P27 is reached:
• STP (STP): once the required pressure is reached and no further
request is made, the pump speed decreases to the P27 value: the
pump continues to run for the selected time interval (P35), after
which it stops automatically.
• SNI (SMI): once the required pressure is reached and no further
request is made, the pump speed decreases to the selected P27
value: the pump continues to run at the same speed. This
parameter affects the control of the pump for HCS, MSE and MSY
control modes.
Default: STP
P35
Smin time [0÷100]
s
This parameter sets the time delay before a shut-off below P27
occurs.
It is only used if P34 = STP.
It affects the control of the pump for HCS, MSE and MSY control
modes.
Default: 0 s.
P36
Window [0÷100]
%
This parameter sets the ramp control interval, as a percentage of the
pressure setpoint.
It is used to define the range of pressures, around the setpoint, in
which the pump uses slow acceleration and deceleration ramps
instead of fast ones.
It affects the control of the pump for HCS, MSE and MSY control
modes (also see Par. 6.6.2).
Default: 10%.
P37
Hysteresis [0÷100]
%
This parameter sets the slow ramp hysteresis, as a percentage of P36.
It helps define the pressure range, around the setpoint, in which the
pump goes from slow acceleration ramp (P28) to slow deceleration
ramp (P29).
The parameter affects the control of the pump for HCS, MSE and MSY
control modes (also see Par. 6.6.2).
Default: 80%.
P38
Speed Lift [0÷MAX
*
]
rpmx10
This parameter sets the speed limit after which the linear increase of
the actual require value starts (P02), until the total increase (P39) at
maximum speed (P26).
Default: P27.
P39
Lift Amount [0÷200]
%
This parameter sets the increase value of the actual required value
(P02) at the maximum speed (P26), measured as a percentage of the
required value (P01).
It determines the increase of the required pressure set, useful to
compensate for flow resistances at high flow rates.
Default: 0.
*
Depending on the type of pump used