Double Pump Installation/Y-Pipe Installation; Adjusting The Pump Output - Wilo CronoLine-IL-E Einbau- Und Betriebsanleitung

9.2 Double pump installation/Y-pipe
installation
Fig. 44: Setting the master pump
9.3

Adjusting the pump output

Installation and operating instructions Wilo-CronoLine-IL-E, CronoTwin-DL-E, CronoBloc-BL-E
parts come into contact with the pump!
Depending on the pump or system operating conditions (fluid
temperature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• Allow the pump/system to cool off/warm up before performing
any work.
• Always wear protective clothing, protective gloves and protective
goggles when working.
WARNING! Danger of injury!
If the pump/system is installed improperly, liquid may be ejected
during commissioning. Individual components may also become
loose.
• Keep a safe distance from the pump during commissioning.
• Wear protective clothing, protective gloves and protective goggles.
DANGER! Risk of fatal injury!
Falling pumps or pump parts may result in life-threatening injuries.
• When performing installation work, protect the pump components
against falling.
NOTICE:
For double pumps, the left-hand pump in the direction of flow is
already factory-configured as the master pump.
NOTICE:
For the initial commissioning of a Y-pipe installation that has not
been preconfigured, both pumps are set to their factory setting. After
connecting the double pump communication cable, the error code
"E035" is displayed. Both drives run at the emergency operation
speed.
On acknowledgement of the error message, menu <5.1.2.0> is dis-
played and "MA" (= master) flashes. In order to acknowledge "MA",
"access disable" must be deactivated and service mode must be
active (Fig. 44).
Both pumps are set to "master" and "MA" flashes on the displays of
both electronic modules.
• Acknowledge one of the two pumps as master pump by pressing the
operating button. The status "MA" appears on the display of the mas-
ter pump. The differential pressure sensor must be connected on the
master.
The measuring points of the differential pressure sensor of the master
pump must be on the suction and pressure side of the double-pump
system in the respective collector pipe.
The other pump will then display the status "SL" (= slave).
All further pump settings must now be made via the master only.
NOTICE:
The procedure can be manually started later by selecting the
menu <5.1.2.0>.
(For information about navigation in the service menu, see 8.6.3
"Navigation" on page 96).
• The system was designed for a certain duty point (full load point, cal-
culated maximum heating capacity load). During commissioning, the
pump output (delivery head) is to be set according to the duty point
of the system.
• The factory setting does not correspond to the output required for
the system. It is determined with the help of the pump curve diagram
for the selected pump type (e.g. from data sheet).
NOTICE:
The flow value shown on the IR-Monitor/IR-Stick display or output to
the building management system must not be used to control the
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