Lowara e-SVE - Page 34

en – Original instructions
34
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 Hydrovar
®
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 Hydrovar® controller once the
minimum speed of the pump is reached (P27):
 STP (STP): once the required pressure is reached and no further
request is made, the pump speed decreases to the selected P27 value:
Hydrovar® then keeps running for the selected time interval (P35), and
then 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:
Hydrovar® continues running 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 by the Hydrovar® controller 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
Hydrovar
®
controller 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 Hydrovar
®
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