Control Functions - Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung

en
11 Setting the control functions
11.1

Control functions

170
Basic control functions are available depending on the application.
Select control functions using the setting assistant:
• Differential pressure ∆p-v
• Differential pressure Δp-c
• Index circuit ∆p-c
• Dynamic Adapt plus
• Volume flow constant (Q-const.)
• Multi-Flow Adaptation
• Temperature constant (T-const.)
• Differential temperature (∆T-const.)
• Speed constant (n-const.)
• PID control
H
H
max
1 H
s
H
2
s
H
min
Fig. 37: Control functions
Differential pressure ∆p-v
The control triggers a linear change in the differential pressure setpoint the pump must en-
sure 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 set-
ting 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".
Δp‑c is used in circuits with variable pressure and volume flows, e.g. radiators with thermo-
static valves or air-conditioning devices.
A hydronic balancing is required in all circuits mentioned.
Differential pressure Δp-c
The control keeps the differential pressure generated by the pump constant over the per-
missible flow rate range at the set differential pressure setpoint H
characteristic curve.
An optimised constant differential pressure control is available for the corresponding pre-
defined applications.
Assuming a required delivery head to be set according to the design point, the pump vari-
ably 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 adjusted 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.
Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
H
H
max
1 H
s
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 maximum
set
Q