Wilo Helix2.0-VE Installation And Operating Instructions Manual page 54

en
54
The actively operated pump is regularly changed automatically to guarantee even usage of
both pumps in the event of single pump operation. If only one pump is running, the pump
being operated alternates after 24 h effective running time at the latest. Both pumps run at
the time of pump changeover so that operation is not interrupted. The operated pump can
be replaced at least every 1 hour and can be set in length increments up to a maximum of
36 hours.
NOTICE
Even after the mains voltage has been switched off and switched on
again, the remaining time until the next pump cycling continues to run.
The timer does not start again from the beginning!
SSM/ESM (collective fault signal/individual fault signal)
• The SSM function must preferably be connected to the main pump. The SSM contact
can be configured as follows:
the contact reacts either only in the event of a fault or in the event of a fault and a
warning.
Factory setting: SSM responds only in the event of an error. Alternatively or additionally,
the SSM function can also be activated on the standby pump. Both contacts work in par-
allel.
• ESM: The ESM function of the double pump can be configured on each head of the
double pump head as follows: The ESM function on the SSM contact only signals faults
of the respective pump (individual fault signal). In order to record all faults of the two
pumps, both contacts must be assigned.
SBM/EBM (collective run signal/individual run signal)
• The SBM contact can be assigned to any of the two pumps. The following configuration
is possible:
The contact is activated when the motor is in operation, power supply is present or no
fault is present.
Factory setting: ready for operation. Both contacts signal the operating status of the
double pump in parallel (collective run signal).
• EBM: The EBM function of the double pump can be configured as follows: The SBM con-
tacts only signal run signals of the respective pump (individual run signal). In order to
record run signals of both the pumps, both contacts must be assigned.
Communication between pumps:
When connecting two similar single pumps to do a double pump, Wilo Net must be installed
between the pumps using a cable.
Then set the termination and the Wilo Net address in the menu under "Settings/External in-
terfaces/Settings Wilo Net". Then, in the "Dual pump management" sub-menu of the "Set-
tings" menu, select the settings "Connect double pump".
NOTICE
For the installation of two single pumps to form a double pump, see
chapter "Double pump installation", "Electrical connection" and "Applica-
tion and function of the Wilo Net interface".
The control of both pumps starts from the main pump to which the differential pressure
sensor is connected.
In case of breakdown/fault/communication interruption, the main pump alone takes over
complete operation. The main pump runs as a single pump according to the set operating
modes of the double pump.
The standby pump, which receives no data from the differential pressure sensor, runs in the
following cases at an adjustable constant emergency operation speed.
• The main pump to which the differential pressure sensor is connected fails.
Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.02/2023-03