Xylem LOWARA e-SVE Installation, Operation And Maintenance Manual page 38

en – Original instructions
P31. Ramp 4 [1÷999]
This parameter (default value 35) adjusts the slow deceleration time expressed in [seconds], thus
determining:
 the regulation speed of the internal Hydrovar
 the constant outgoing pressure.
The ramp depends on the system which has to be controlled, and affects the control of the pump
for HCS, MSE and MSY control modes.
P32. Ramp Speed Min Acceleration [2.0÷25.0]
This parameter (default value 2.0) sets the fast running up time expressed in [seconds], and
represents the acceleration ramp used by the internal Hydrovar
speed of the pump, defined in P27, is reached.
This parameter affects the control of the pump for HCS, MSE and MSY control modes.
P33. Ramp Speed Min Deceleration [2.0÷25.0]
This parameter (default value 2.0) sets the fast running down time expressed in [seconds], and
represents the deceleration ramp used by the internal Hydrovar
once the minimum speed of the pump, defined in P27, is reached.
This parameter affects the control of the pump for HCS, MSE and MSY control modes.
P34. Speed Min Configuration [STP, SMI]
This parameter (default value STP) defines the operation of the internal Hydrovar
once the minimum speed of the pump, defined in P27, is reached.
 If P34 = STP (
 If P34 = SMI (
This parameter affects the control of the pump for HCS, MSE and MSY control modes.
P35. Smin time [0÷100]
This parameter (default value 0s) sets the delay time expressed in [seconds], before a shut-off
below P27 occurs, and is used by the internal Hydrovar
This parameter affects the control of the pump for HCS, MSE and MSY control modes.
P36. Window [0÷100]
This parameter (default value 10), expressed as percentage [%] of the pressure set-point, sets
the range for ramp control, thus defining the region, around the pressure set-point, where the
internal Hydrovar
This parameter affects the control of the pump for HCS, MSE and MSY control modes.
P37. Hysteresis [0÷100]
This parameter (default value 80), expressed as percentage [%] of P36, sets the regulation
hysteresis for slow ramp switching among acceleration and deceleration ones
This parameter affects the control of the pump for HCS, MSE and MSY control modes.
38
STP
), once the required pressure is reached and no further consumption is
needed, the pump speed decreases to the selected P27 value: Hydrovar
keeps running for the selected P35 time interval and after this time stops automatically.
SNI
), once the required pressure is reached and no further consumption is
needed, the pump speed decreases to the selected P27 value: Hydrovar
keeps running at that speed (the pump never stops automatically).
®
controller uses slow acceleration and deceleration ramps instead of fast ones
®
controller for small changes in demand.
®
controller until the minimum
®
controller for stopping the pump
®
controller only if P34 = STP.
®
controller
®
controller then
®
controller then