Wilo Stratos GIGA2.0-D, Инструкция по установке и эксплуатации

Страница: 209 / 552

Double pump operation en
Installation and operating instructions Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D 209
Adjustable control modes for the MANUAL function:
Control mode
MANUAL – Differential pressure Δp-c
MANUAL – Differential pressure Δp-v
MANUAL – Volume flow Q-const
MANUAL – Speed n-const
Table 31: Control modes MANUAL function
12 Double pump operation
12.1 Dual pump management
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 es-
tablished or disconnected. The twin-head pump function can also be set here.
The dual pump management has the following functions:
ƒ
Main/standby operation
Each of the two pumps provides the configured flow rate. The other pump is avail-
able 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.
ƒ
Efficiency-optimised peak-load operation (parallel operation)
In peak-load operation (parallel operation), the hydraulic output is provided jointly
by both pumps.
In the partial load range, the hydraulic output is initially provided by just one of the
two pumps.
If the sum of the electrical power consumption P1 of both pumps in the partial load
range is less than the power consumption P1 of one pump, then the second pump
is switched on with optimised efficiency.
This operating mode optimises operational efficiency compared to conventional
peak-load operation (exclusively load-sensitive switching on and off).
If only one pump is available, the remaining pump takes over the supply. The pos-
sible peak load is limited due to the power of the single pump. Parallel operation is
also possible with two single pumps of the same type in twin-head pump opera-
tion in the Y-piece.
ƒ
Pump cycling
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
(main/standby, peak load or setback operation) is running, the pump being oper-
ated is changed after a running time of 24 h 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
If the mains voltage is switched off, the running time counter starts again at 0 until
the next pump alteration after the mains voltage is switched on again.
ƒ
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 only reacts in the event of a fault.
Alternatively or additionally, the SSM function can also be activated on the
standby pump. Both contacts work in parallel.
–
ESM The ESM function of the twin-head pump can be configured on each twin-
head pump head as follows: The ESM function on the SSM contact only signals