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

11.2

Additional control functions

11.2.1 No-Flow Stop
Installation and operating instructions Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D
Setting the control functions
Δp‑c is used in circuits with variable pressure and volume flows, e.g. radiators with
thermostatic valves or air-conditioning devices.
A hydronic balancing is required in all circuits mentioned.
Dynamic Adapt plus (factory setting)
The control mode Dynamic Adapt plus autonomously adjusts the pump output to the
requirements of the system. Setpoint adjustment is not necessary.
It is optimal for circuits whose design points are unknown.
The pump continuously adjusts its delivery rate to the requirements of the consumer
and status of the open and closed valves and thus significantly reduces the set pump
energy.
Dynamic Adapt plus is used in consumer circuits with variable pressure and volume
flows, e.g. radiators with thermostatic valves or underfloor heating with room-con-
trolled actuating drives.
Hydronic balancing is required in all circuits mentioned.
In hydraulic circuits with invariable resistances, such as generator circuits or feeder cir-
cuits (to hydraulic shunts, differential pressure-less distributors or heat exchangers),
another control mode has to be selected, e.g. volume flow constant (Q-const), differ-
ential temperature constant (∆T‑const), differential pressure (∆p‑c) or Multi-Flow Ad-
aptation.
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 circuit) is adjusted to the
volume flow in the consumer circuits (secondary circuit) with the Multi-Flow Adapta-
tion control mode.
Multi-Flow Adaptation is set on the Wilo-Stratos GIGA2.0 feeder pump in the primary
circuit upstream of a hydraulic shunt, for example.
The Wilo-Stratos GIGA2.0 feeder pump is connected to the Wilo-Stratos GIGA2.0 and
also Wilo-Stratos MAXO pumps in the secondary circuits 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.
During commissioning, all associated secondary pumps must be registered with the
primary pump so that it takes their volume flows into account. See "Settings menu –
Set control mode" [} 201] section.
Temperature constant (T-const)
The pump controls to a set target temperature T
The actual temperature to be controlled is determined by an external temperature
sensor, which is connected to the pump.
Differential temperature constant (∆T-const)
The pump controls to a set differential temperature ∆T
and return temperature).
Actual temperature through:
ƒ
two temperature sensors connected to the pump.
Speed constant (n-const/factory setting for Stratos GIGA2.0 ... R1)
The speed of the pump is kept at a set constant speed.
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.
The additional control function "No-Flow Stop" continuously monitors the actual
volume flow of the heating/cooling system.
If the volume flow decreases due to closing valves and falls below the "No-Flow Stop
Limit" threshold set for No-Flow Stop, the pump is stopped.
The pump checks every 5 minutes (300 s) whether the volume flow demand is increas-
in its characteristic curve.
set
.
target
(e.g. difference from feed
target
en
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