Wilo CronoLine-IL-E Notice De Montage Et De Mise En Service page 101

Fig. 9: Example – differential pressure sensor
connection in y-pipe installation
Fig. 10: Insert IF module
6.4.1 Operating modes
6.4.2 Behaviour in twin-head pump op-
eration
Δp
Pump 1 Pump 2
Fig. 11: Pump cycling, schematic representa-
tion
Installation and operating instructions • Wilo-CronoLine-IL-E, Wilo-CronoTwin-DL-E, Wilo-CronoBloc-BL-E • Ed.01/2024-02
The main pump controls both pumps.
In the event of a fault in one pump, the other pump runs according to the main pump's con-
trol input. In the event of a total breakdown of the main pump, the partner pump runs at the
emergency operation speed. The emergency operation speed can be set in menu <5.6.2.0>
(see section "Operation during interruption of communication").
The main pump's display shows the status of the twin-head pump. The partner pump's dis-
play shows "SL".
In the example, the main pump is the left-hand pump in the direction of flow. Connect the
differential pressure sensor to this pump!
The measuring points of the differential pressure sensor must be located in the collector pipe
on the suction and discharge side of the twin-head pump system.
Interface module (IF module)
An IF module (accessories) attached in the terminal room is required for communication
between pumps and building management systems.
Communication between the main pump and the partner pump is via an internal interface
(terminal: MP).
For pumps in Y-pipe applications where the electronic modules are connected to each other
via the internal interface, only the main pumps require an IF module.
Communication
PLR / Interface converter
LONWORKS network
BACnet
Modbus
CAN bus
Table 3: IF modules
NOTICE
The procedure and additional explanations on commissioning and config-
uring the IF module on the pump are described in the installation and op-
erating instructions for the IF module used.
Main/standby operation
Only one pump ever runs at a time. Each of the two pumps provides the configured flow
rate. The other pump is available in case of malfunction or runs after pump cycling.
Pump cycling
With twin-head pump operation, pump cycling occurs periodically (the intervals can be set;
factory setting = 24 hours).
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 beam on the "AUX" contact
• Manual (menu <5.1.3.1>)
Manual or external pump cycling is possible 5 seconds after the last pump cycling at the
earliest.
t
Activating external pump cycling simultaneously deactivates internal time-controlled pump
cycling.
Schematised description of pump cycling operation (see diagram):
Main pump
IF module PLR
IF module LON
BACnet IF module
Modbus IF module
IF module CAN
en
Partner pump
No IF module necessary
No IF module necessary
No IF module necessary
No IF module necessary
No IF module necessary
101