Pipe Filling Function; Pulse Flowmeter" ("Pulse Flowmeter Setup") - Grundfos LCSE Installation And Operating Instructions Manual

7.18 "Pipe filling function"

Pump variant
LCSE
VLSE
This function is typically used in pressure-boosting applications
and ensures a smooth startup of systems with for instance empty
pipes.
Startup takes place in two phases. See fig. 70.
1. Filling phase.
The pipes are slowly filled with water. When the pressure
sensor of the system detects that the pipes have been filled,
phase two begins.
2. Pressure build-up phase.
The system pressure is increased until the setpoint is
reached. The pressure build-up takes place over a pressure
build-up time. If the setpoint is not reached within a given
time, a warning or an alarm can be given, and the pumps can
be stopped at the same time.
1. Filling phase
(constant-curve
Pressure
operation)
"Setpoint"
Filling pressure
Actual value
Filling time
Maximum filling time
Fig. 70 Filling and pressure build-up phases
"Pipe filling
function"
●
●
2. Pressure build-up
phase
(constant-pressure
operation)
Setpoint
ramp-up
Time
Pressure [sec]
build-up
time
Setting range
• "Filling speed".
Fixed speed of the pump during the filling phase.
• "filling pressure".
The pressure that the pump must reach before the maximum
filling time.
• "max. filling time".
The time in which the pump must reach the filling pressure.
• "Max. time reaction".
Reaction of the pump if the maximum filling time is exceeded:
– warning
– alarm (pump stops).
• "Pressure build-up time".
Ramp time from when the filling pressure is reached until the
setpoint must be reached.
When you activate this function, the function always
starts when the pump has been in operating mode
"Stop" and is changed to "Normal".
Factory setting
See section
10. Technical data.

7.19 "Pulse flowmeter" ("Pulse flowmeter setup")

Pump variant
LCSE
VLSE
You can connect an external pulse flowmeter to one of the digital
inputs in order to register the actual and accumulated flows.
Based on this, you can also calculate the specific energy.
To enable a pulse flowmeter, set one of the digital-input functions
to "Accumulated flow" and set the pumped volume per pulse. See
Digital inputs"
section .
7.7 "
Factory setting
See section
10. Technical data.
"Pulse flowmeter"
("Pulse flowmeter setup")
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