Double Pump Operation; Dual Pump Management - Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung

12

Double pump operation

12.1

Dual pump management

Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
Function Description
Control mode Pump works according to the set controls.
OFF Pump is switched off. Pump is not running.
All other set controls will be overridden.
MIN The pump is set to minimum power.
All other set controls are overridden.
MAX The pump is set to maximum power.
All other set controls are overridden.
MANUAL Pump is working according to set control, which is meant for
the "MANUAL" function.
Table 29: Functions of manual operation
The manual operation functions OFF, MAX, MIN, MANUAL correspond to the functions Ext.
OFF, Ext. MAX, Ext. MIN and Ext. MANUAL in their effect.
Ext. OFF, Ext. MAX, Ext. MIN and Ext. MANUAL can be triggered via the digital inputs or via a
bus system.
Priorities
Priority* Function
1 OFF, External OFF (binary input), External OFF (bus system)
2 MAX, External MAX (binary input), External MAX (bus system)
3 MIN, External MIN (binary input), External MIN (bus system)
4 MANUAL, External MANUAL (binary input)
Table 30: Priorities
* Priority 1 = highest priority
NOTICE
The "MANUAL" function replaces all functions including those which are
controlled via a bus system.
If a monitored bus communication fails, the control mode set via the
"MANUAL" function is activated (Bus Command Timer).
Adjustable control modes for the MANUAL function:
Control mode
MANUAL – Differential pressure Δp-v
MANUAL – Differential pressure Δp-c
MANUAL – Volume flow Q-const
MANUAL – Speed n-const
Table 31: Control modes MANUAL function
All Stratos GIGA2.0 pumps are equipped with an integrated dual pump management.
In the "Twin-head pump operation" menu, a twin-head pump connection can be estab-
lished or disconnected. The twin-head pump function can also be set here.
The dual pump management has the following functions:
• Main/standby operation:
Each of the two pumps provides the configured flow rate. The other pump is available in
case of malfunction or runs after pump cycling.
Only one pump runs at a time (factory setting).
The main/standby operation is also completely active even for two similar single pumps
in a twin-head pump installation in the Y-piece.
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