Setting The Control Functions - Wilo Stratos GIGA2.0-I Notice De Montage Et De Mise En Service

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11

Setting the control functions

11.1 Control functions
186
Setting the control functions
Basic control functions are available depending on the application.
Select control functions using the setting assistant:
ƒ
Differential pressure Δp-c
ƒ
Index circuit ∆p-c
ƒ
Differential pressure ∆p-v
ƒ
Dynamic Adapt plus
ƒ
Volume flow constant (Q-const)
ƒ
Multi-Flow Adaptation
ƒ
Temperature constant (T-const)
ƒ
Differential temperature (∆T-const)
ƒ
Speed constant (n-const)
ƒ
PID control
H
H
max
1 H
s
s
H
2
s
H
min
Q
Fig. 37: Control functions
Differential pressure Δp-c
The control keeps the differential pressure generated by the pump constant over the
permissible flow rate range at the set differential pressure setpoint H
mum characteristic curve.
An optimised constant differential pressure control is available for the corresponding
predefined applications.
Assuming a required delivery head to be set according to the design point, the pump
variably adjusts the pump output to the required volume flow. The volume flow varies
due to the open and closed valves on the consumer circuits. The pump output is adjus-
ted to the requirements of the consumer load and the energy requirement is reduced.
Δp‑c is used in circuits with variable pressure and volume flows, e.g. underfloor heating
or ceiling cooling. A hydronic balancing is required.
Index circuit Δp-c
An optimised constant differential pressure control is available for "index circuit Δp‑c".
This differential pressure control ensures supply in a widely branched, possibly poorly
balanced system.
The pump takes into account the point in the system which is the most unfavourable to
supply.
For this purpose, the pump requires a differential pressure sensor which is installed at
this point ("index circuit") in the system.
The delivery head must be adjusted to the required differential pressure. The pump
output is adjusted to this point as required.
NOTICE
The differential pressure sensor mounted at the factory on the pump can be oper-
ated in parallel to the differential pressure sensor at the index circuit, e.g. for heat
quantity measurement on the pump. The differential pressure sensor mounted at
the factory is already configured at analogue input AI1. The differential pressure
sensor at the index circuit has to be configured at another analogue input.
Differential pressure ∆p-v
The control triggers a linear change in the differential pressure setpoint the pump must
ensure between reduced differential pressure H and H
The controlled differential pressure H increases or decreases with the flow rate.
The slope of ∆p-v characteristic curve can be adjusted to the respective application by
setting the percentage of H
set
Options "Nominal duty point Q" and "Slope of ∆p-v characteristic curve" are available
in the context menu [•••] of the setpoint editor "∆p-v differential pressure setpoint".
H
H
max
1 H
s
H
2
s
H
min
Q
.
set
(slope ∆p‑v characteristic curve).
H
n
max
n
min
n = const
max
Q
up to the maxi-
set
WILO SE 2021-12