Wilo Stratos MAXO Notice De Montage Et De Mise En Service page 63

The PID controller used in the pump is a standard PID controller.
The controller compares the measured actual value with the specified setpoint and attempts to match the
actual value to the setpoint as closely as possible.
Provided the appropriate sensors are used, various controls can be implemented.
When selecting a sensor, attention must be paid to the configuration of the analog input.
The control behavior can be optimized by changing the P, I, and D parameters.
The direction of control action can be adjusted by switching the control inversion on or off.
9.2 Additional control functions
NOTICE
Additional control functions are not available for all applications! See table in section "Pre-
defined applications in the settings assistant [" 79]".
These additional control functions are available depending on the application:
• Night setback
• No-Flow Stop
• Q-Limit
Max
• Q-Limit
Min
• Nominal duty point Q
• Gradient of the Δp-v characteristic curve
• Multi-Flow Adaptation mixer
9.2.1 Night setback
The pump detects a significant reduction in fluid temperature over a defined period of time. The pump
thereby deduces that the heat generator is in night setback.
The pump independently reduces its speed until a high fluid temperature is once again detected over a
longer period of time.
NOTICE
The additional control function "Night setback" is an energy-saving function. In this way,
avoiding unnecessary running times saves electrical pump energy.
This function is deactivated in the factory settings and must be activated if required.
CAUTION
Property damage caused by frost!
The night setback may be activated only if hydronic balancing of the system has been com-
pleted!
In case of non-compliance, inadequately supplied system parts may freeze due to frost!
• Carry out hydronic balancing!
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
en-US
63