Wilo Stratos MAXO Notice De Montage Et De Mise En Service page 62

en-US
NOTICE
In hydraulic circuits with invariable resistances, such as generator circuits or feeder circuits
(to hydraulic shunts, differential pressure-less distributors, or heat exchangers), another
control mode has to be selected, e.g. volume flow constant (Q-const), differential tempera-
ture constant (∆T‑const), differential pressure (∆p‑c) or Multi-Flow Adaptation.
Temperature constant (T-const) (factory setting for drinking water pumps)
The pump constantly adjusts to a set temperature T
Current temperature determination:
• Through an internal temperature sensor
• Through an external temperature sensor which is connected to the pump
Differential temperature constant (∆T-const)
The pump controls to a set differential temperature ∆T
ture).
Actual temperature determination:
• Through the internal temperature sensor and an external temperature sensor.
• Two external temperature sensors.
Volume flow constant (Q-const.)
The pump controls a set volume flow Q
Multi-Flow Adaptation
The volume flow in the generator or feeder circuit (primary loop) is adjusted to the volume flow in the con-
sumer circuits (secondary loop) with the Multi-Flow Adaptation control mode.
Multi-Flow Adaptation is set on the Wilo-Stratos MAXO feeder pump in the primary loop upstream of a hy-
draulic shunt, for example.
The Wilo-Stratos MAXO feeder pump is connected to the Wilo-Stratos MAXO pumps in the secondary loops
with Wilo Net data cable.
The feeder pump continuously receives the respective required volume flow from each individual secondary
pump at short intervals.
The sum of the required volume flows from all secondary pumps is set by the feeder pump as the setpoint
volume flow.
To adapt the supply to local conditions, a correction factor (80 – 120%) and a fixed volume flow rate can be
set. The fixed volume flow percentage is always calculated for the calculated volume flow.
On commissioning, all associated secondary pumps must be registered with the primary pump so that it can
take their volume flows into consideration. See also section "Settings menu/set control mode" [" 84].
NOTICE
When replacing a Stratos MAXO pump with SW ≥ 01.04.19.00 in an existing Multi-Flow
Adaptation system with pumps that have a lower SW version (SW < 01.04.19.00), all inte-
grated Stratos MAXO pumps must be updated to a higher SW version (SW ≥ 01.04.19.00).
User-defined PID control
The pump controls based on a user-defined control function. PID control parameters Kp, Ki, and Kd have to
be manually set.
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in its characteristic curve.
set
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
.
setpoint
(e.g. difference from feed and return tempera-
setpoint