Wilo Stratos GIGA Notice De Montage Et De Mise En Service page 106

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6.4.4 Disabling or enabling a pump
106
The (former) main pump continues to follow the control specifications. The (former) part-
ner pump follows the specifications for emergency operation. Emergency operation can
only be exited by initiating the factory setting, remedying the communication interruption
or via "Mains off/Mains on".
Partner pump behaviour
Exiting emergency operation at the partner pump:
• Factory settings restored
If, during a communication interruption, emergency operation is exited by initiating the
factory setting at the (former) partner pump, the (former) partner pump starts with the
factory settings of a single pump. It then runs in operating mode Δp-c with about half the
maximum delivery head.
• Mains off/mains on
If, during a communication interruption, emergency operation is exited via "Mains off/Mains
on" at the (former) partner pump, the (former) partner pump starts with the last specifica-
tions it received from the main pump for emergency operation (for example, constant
speed control with specified speed or "off").
Main pump behaviour
Exiting emergency operation at the main pump:
• Factory settings restored
If, during a communication interruption, the factory setting is initiated at the (former)
main pump, it starts with the factory settings of a single pump. It then runs in operating
mode Δp-c with about half the maximum delivery head.
• Mains off/mains on
If, during a communication interruption, operation is interrupted via Mains off/Mains on
at the (former) main pump, the (former) main pump starts with the last available spe-
cifications from the twin-head pump configuration.
This function is only available for twin-head pump operation. A particular pump can gener-
ally be enabled or disabled in terms of operation in menu <5.1.4.0>. A disabled pump can-
not be used in operation until the disabling has been manually lifted.
The setting can be made at each pump directly or over the infrared interface. If a pump
(main or partner pump) is disabled, it is no longer ready for operation.
In this state, errors are identified, displayed and reported. If a fault occurs in the enabled
pump, the disabled pump does not start up. However, pump kicks are carried out if activ-
ated. The interval for pump kicks starts when the pump is disabled.
Installation and operating instructions • Wilo-Stratos GIGA, Wilo-Stratos GIGA-D, Wilo-Stratos GIGA B • Ed.01/2024-02
NOTICE
The differential pressure sensor is switched to the main pump!
During a communication interruption, the (former) partner pump cannot
run in control mode. If the partner pump is running in emergency opera-
tion, no changes can be made to the electronic module.
After the communication interruption has been fixed, the pumps resume
regular twin-head pump operation as before the fault.
NOTICE
If there is no sensor signal, the (former) partner pump runs at
maximum speed.
To avoid this, the signal from the differential pressure sensor can be
looped through from the (former) main pump. A sensor signal at the
partner pump has no effect in normal twin-head pump operation.