Wilo Yonos MAXO Instrucciones De Instalación Y Funcionamiento página 27

Signal lamps and signals
Collective fault signal contact
6.3 Twin-head pump operation
NOTICE
Install a Wilo-Connect module for each of the two pumps.
Integrated dual-pump management with the functions:
• Main/standby operation with running time-dependent (24 h) switchover of main and standby pump.
Both pumps run simultaneously at the time of pump switchover so that operation is not interrupted. Inad-
equate supply for example in cooling/air-conditioning system is therefore avoided.
• Fault-sensitive switchover to operational standby pump.
In case of a fault with the running pump, the system switches over to the standby pump after approx. 3 s.
The master pump signals the operating status of the double pump (main and standby pump). The standby
pump only signals the operating status of the standby pump.
The DIP switch 1 defines which pump is the master pump (MA) ➜ Fig. 8.
"Ext. Off" of the standby pump must be closed (bridge if required).
NOTICE
If the DIP switch position "ON" = Master is selected on both modules, no standby pump is re-
cognised for either one. Both pumps run in single pump operation according to their set-
tings.
NOTICE
The external control command "Ext. Off" interrupts the running time counter of the
switchover function.
7 Installation and electrical connection
• Electrical work: a qualified electrician must carry out the electrical work.
DANGER
Risk of fatal injury!
Incorrect electrical connection can cause fatal electric shocks!
Follow the detailed instructions for the pump series Yonos MAXO (plus), Yonos MAXO-D or
Yonos MAXO-Z (plus) online:
www.wilo.com/yonos-maxo-plus/om
www.wilo.com/yonos-maxo/om
Installation and operating instructions • Wilo-Connect Modul Yonos MAXO • Ed.03/2024-02
Status Meaning
closed There is no fault.
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