Operating Modes; Behaviour In Dual Pump Operation - Wilo CronoLine-IL-E Einbau- Und Betriebsanleitung

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6.3.1 Operating modes

Main/standby operation
Parallel operation
H
H
max
H
s
s
H
min
Fig. 14: Δp-c control (parallel operation)
H
H
H
max
H
s
H
min
Fig. 15: Δp-v control (parallel operation)

6.3.2 Behaviour in dual pump operation

Pump cycling
74
• For pumps in Y-pipe applications in which the electronic modules are
connected to each other through the internal interface, only the mas-
ter pumps require an IF-Module.
Communication
PLR/Interface converter
LONWORKS network
BACnet
Modbus
CAN bus
Table 2: IF-Modules
NOTICE:
The procedure and further information for commissioning and con-
figuring the IF-Module on the pump can be found in the installation
and operating instructions of the IF-Module used.
Each of the two pumps provides the configuration flow rate. The
other pump is available in case of malfunction or runs after pump
cycling. Only one pump runs at a time (see Fig. 10, 11 and 12).
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
1
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.
Q
See chapter 6.4 "Other functions" on page 77.
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>)
Master pump
IF-Module PLR
IF-Module LON
IF-Module BACnet No IF-Module
IF-Module Modbus No IF-Module
CAN IF-Module
of one pump. Both pumps will then be simultaneously
Slave pump
No IF-Module
necessary
No IF-Module
necessary
necessary
necessary
No IF-Module
necessary
WILO SE 08/2022