Wilo Stratos GIGA Serie Instrucciones De Instalación Y Funcionamiento página 22

English
Parallel operation
H
H
max
H
s
H
min
Fig. 19: p-c control (parallel operation)
H
H
H
max
H
s
H
min
Fig. 20: p-v control (parallel operation)
6.3.2 Behavior in dual pump operation
Pump cycling
Behavior of the inputs and outputs
Fault and run signals
16
In the partial load range, the hydraulic output is provided at the
beginning by one pump. The second pump will be switched on when
it is most effective to do this, i.e. when the total power consumptions
P of both pumps in the partial load range is less than the power con-
1
sumption P of one pump. Both pumps will then be simultaneously
1
adjusted upwards to the maximum speed (Fig. 19 and 20).
In manual control mode, both pumps always run synchronously.
Parallel operation of two pumps is only possible with two identical
pump types.
Compare to chapter 6.4 "Other functions" on page 18.
Q
Q
Q
In dual pump operation, a pump cycling occurs periodically (the period
can be set; Factory setting: 24 h).
Pump cycling can be triggered:
• Internally, time-controlled (menu <5.1.3.2> + <5.1.3.3>)
• Externally (menu <5.1.3.2>) by a positive edge at the "AUX" contact
(see Fig. 26),
• Or manually, (menu <5.1.3.1>)
Manual or external pump cycling is possible five seconds after the last
pump cycling, at the earliest.
Activation of external pump cycling simultaneously deactivates
internal time-controlled pump cycling.
Actual value input In1, setpoint input In2
• Set at the master: acts on the whole unit
"Ext off":
• Set at the master (menu <5.1.7.0 >): depending on the setting in menu
<5.1.7.0 >, acts only on the master or on the master and the slave.
• Set at the slave: acts only on the slave.
ESM/SSM:
• A collective fault signal (SSM) can be connected to the master for a
central control center.
• In this case, the contact may only be made to the master.
• The display is for the whole unit.
• This signal can be programmed on the master (or using the IR-Monitor)
as an individual fault signal (ESM) or a collective fault signal (SSM) in
menu <5.1.5.0>.
• The contact must be made to each pump for individual fault signals.
WILO SE 01/2014