English (GB)
45
13.17 "LiqTec" (LiqTec function)
You can enable the function of the LiqTec sensors in
this display. A LiqTec sensor protects the pump
against dry running.
The function requires that a LiqTec sensor has been
fitted and connected to the pump.
When you have enabled the LiqTec function, it stops
the pump if dry running occurs. Restart the pump
manually if it has been stopped due to dry running.
"Dry running detection delay"
You can set a detection delay in order to make sure
that the pump is given a chance to start up before
the LiqTec function stops the pump due to dry
running.
Range: 0-254 seconds.
Factory setting
See section 24. Factory settings.
13.18 "Stop function" (Low-flow stop
function)
You can set the "Low-flow stop function" to these
values:
•Not active
• Energy-optimal mode
• High-comfort mode
• "User-defined mode" (Customised operating
mode).
When the low-flow stop function is active, the flow is
monitored. If the flow becomes lower than the set
minimum flow (Q
min
), the pump changes from
continuous operation at constant pressure to
start-stop operation and stops if the flow reaches
zero.
The advantages of enabling the "Low-flow stop
function" are the following:
• no unnecessary heating of the pumped liquid
• reduced wear of the shaft seals
• reduced noise from operation.
The disadvantages of enabling the "Low-flow stop
function" may be the following:
• The delivered pressure is not completely
constant as it fluctuates between the start and
stop pressures.
• The frequent starts/stops of the pump may in
some applications cause acoustic noise.
The impact of the above disadvantages very much
depends on the setting selected for the stop function.
The High-comfort mode setting minimises pressure
fluctuations and acoustic noise.
Select Energy-optimal mode if the main priority is to
reduce the energy consumption as much as
possible.
Possible settings of the stop function:
• Energy-optimal mode
The pump automatically adjusts the parameters
for the stop function so that the energy
consumption during the start-stop operation
period is minimised.
In this case, the stop function uses the
factory-set values of the minimum flow (Q
min1
)
and other internal parameters. See fig. 52.
• High-comfort mode:
The pump automatically adjusts the parameters
for the stop function so that the disturbances
during the start-stop operation period are
minimised.
In this case, the stop function uses the
factory-set values of the minimum flow (Q
min2
)
and other internal parameters. See fig. 52.
• "User-defined mode" (Customised operating
mode):
The pump uses the parameters set for ∆H and
minimum flow (Q
min3)
respectively for the stop
function. See fig. 52.
Fig. 52 Difference between start and stop
pressures (∆H) and minimum flow rate
Pump variant
"LiqTec"
(LiqTec function)
CME -
CRE, CRIE, CRNE,
SPKE, MTRE
●
Pump variant
"Stop function"
(Low-flow stop function)
CME ●
CRE, CRIE, CRNE,
SPKE, MTRE
●
TM06 4267 1815
Stop pressure
Start pressure
To Next Page
Loading...
Need help?
General
