Wilo STRATOS GIGA, Installation And Operating Instructions Manual, Page: 80 / 265

English
80 WILO SE 03/2018
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.
6.3.1 Operating modes
Main/standby operation 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).
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 constant speed 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 83.
6.3.2 Behaviour in double pump operation
Pump cycling In double pump operation, a pump cycling occurs periodically (the
period can be set; factory setting: 24 h).
Pump cycling can be triggered
• Internally, time-controlled (menus <5.1.3.2> + <5.1.3.3>)
• Externally (menu <5.1.3.2>) by a positive edge at the “AUX” contact
(see Fig. 25)
• Manually (menu <5.1.3.1>)
Communication Master pump Slave pump
PLR/Interface converter IF module PLR No IF module
necessary
LONWORKS network IF module LON No IF module
necessary
BACnet IF module BACnet No IF module
necessary
Modbus IF module Modbus No IF module
necessary
CAN bus IF module CAN No IF module
necessary
Fig. 14: Δ p-c control (parallel operation)
Q
s
H
m a x
H
H
s
H
min
Fig. 15: Δ p-v control (parallel operation)
Q
H
H
Q
H
m a x
H
s
H
min