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8.4.5 Pump operating mode
Pump operating
mode
The operating mode (manual-0-automatic) can be selected on the screen or via an external
switch. The source has to be configured (parameter 1-1-5-1). The pump operating mode for
each pump set can then be separately set to "Manual-ON", "Manual-OFF" and "Automatic".
Mains-operated pump sets that have been started manually run at full nominal speed; pump
sets that are operated on a frequency inverter and have been started up manually run at a
configured fixed speed (parameter 1-2-1-2-11). In "Manual-OFF" operating mode pumps are
not available for operation. In "Automatic" operating mode pump sets can be started up in
line with pressure control.
8.4.6 Operating frequency range
Operating frequency
range
For pump sets operated on a frequency inverter, a Minimum Speed (parameters 1-2-1-2-16
and 1-2-1-2-9) and a Maximum Speed (parameters 1-2-1-2-17 and 1-2-1-2-10) can be
configured for the frequency range of the frequency inverters. In addition, the ranges of
frequency and pump load to be displayed on the screen and in the app has to be configured
(parameters 2-4-1-1 and 2-4-1-2).
8.4.7 Units displayed
Units displayed
On the display, values can be shown in different units. The units can be set for the values of
Pressure (parameter 1-6-2-1), Height (parameter 1-6-2-2) and Temperature (parameter
1-6-2-3).
8.4.8 Saving/loading settings
Saving/loading
settings
The pressure booster system is supplied with a saved factory setting. This factory setting
can be reset. The settings made during commissioning can also be saved and reset.
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8.5 Pump protection
8.5.1 Start delay and stop delay
Start delay and stop
delay
Having several pump sets start up at the same time can be prevented by configuring a Start
Delay (parameter 2-3-1) or Stop Delay (parameter 2-3-2).
8.5.2 Minimum runtime
Minimum runtime
When a pump set is started up, it can only be stopped again after the Minimum Runtime
(parameter 2-3-3) has been reached. Every time the number of actual pump starts exceeds
the maximum number of pump starts (parameters 1-2-1-2-9 and 1-2-2-2-9), the actual
minimum runtime is extended by the Minimum Runtime Correction Step (parameter 2-3-4).
When the pump set is then started less frequently again, the actual minimum runtime is
shortened by the Minimum Runtime Correction Step (parameter 2-3-4) again. A reduction by
more than the minimum runtime is not possible.
8.5.3 Pump changeover
Pump changeover
When the operating time of the pump set exceeds the configured Maximum Runtime
(parameter 2-4-2-2), a Changeover within Pump Group can be triggered (parameter
2-4-2-1). Another available pump set then takes over as the duty pump. For pressure
booster systems in nominal speed operation, Over-/Undersupply can be selected for a
changeover between the two pumps (parameter 2-4-2-3). A Time of Over-/Undersupply
(parameter 2-4-2-4) can be configured for the pump changeover. In speed-controlled
pressure booster systems the transition is smooth with a handshake between the two
pumps. A duration for the Ramp-up Time (parameter 2-4-2-5) for starting up the pump and a
duration for the Ramp-down Time (parameter 2-4-2-6) for stopping the pump can be
configured.
