Wilo VeroLine-IP-E 40/160-4/2 Series, Инструкция по установке и эксплуатации

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English
Installation and operating instructions Wilo-VeroLine-IP-E, VeroTwin-DP-E 67
Parallel operation 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
1
of both pumps in the partial load range is less than the power con-
sumption P
1
of one pump. Both pumps will then be simultaneously
adjusted upwards to the maximum speed. (Fig. 14 and 15).
In manual control mode, both pumps always run synchronously.
Parallel operation of two pumps is only possible with two identical
pump types.
See chapter 6.4 “Other functions” on page 69.
6.3.2 Behaviour in dual pump operation
Pump cycling 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. 23)
• 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.
Pump cycling can be described schematically as follows (see also
Fig. 16):
• Pump 1 turns (black line)
• Pump 2 is switched on at minimum speed and soon afterwards
reaches the setpoint (grey line)
• Pump 1 is switched off
• Pump 2 continues to run until the next pump cycling
NOTE:
In manual control mode, a slight increase in flow can be expected.
Pump cycling is depending on the ramp time and generally lasts 2 s. In
auto control, there may be minor fluctuations in the delivery head.
However, pump 1 adjusts itself to the changed conditions. Pump
cycling is dependent on the ramp time and generally lasts 4 s.
Behaviour of the inputs and outputs Actual value input In1 setpoint input In2
• At the master: acts on the whole unit
“External 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
Fig. 14: Δ p-c control (parallel operation)
Q
s
H
max
H
H
s
H
min
Fig. 15: Δ p-v control (parallel operation)
Q
H
H
Q
H
max
H
s
H
min
Fig. 16: Pump cycling
t
Δp
Pump 1 Pump 2