Filling And Venting; Twin-Head Pump Installation/Y-Pipe Installation - Wilo Stratos GIGA Série Notice De Montage Et De Mise En Service

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9.1

Filling and venting

Fig. 40: Air vent valve
9.2 Twin-head pump installation/
Y-pipe installation
Fig. 41: Setting the master pump
112
• Prime and vent the unit correctly.
CAUTION! Risk of property damage!
Dry running will destroy the mechanical seal.
• Make sure that the pump does not run dry.
• To avoid cavitation noises and damage, a minimum inlet pressure
must be guaranteed at the suction port of the pump. This minimum
inlet pressure depends on the operation situation and the duty point
of the pump, and must be defined accordingly.
• The main parameters for defining the minimum inlet pressure are the
NPSH value of the pump at its duty point and the vapour pressure of
the fluid.
1
• Vent the pumps by loosening the air vent valves (Fig. 40, Item 1). Dry
running will destroy the mechanical seal of the pump. The differential
pressure sensor must not be vented (risk of destruction).
WARNING! Danger due to extremely hot or extremely cold pressur-
ised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the venting screw is opened completely, extremely hot
or extremely cold fluid in liquid or vapour form may escape or shoot
out at high pressure.
• Always exercise caution when opening the venting screw.
• Protect the module box from any water escaping when venting.
WARNING! Danger of burns or freezing to the pump when body
parts come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), 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 incorrectly, fluid 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 gog-
gles.
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 twin-head 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 twin-head 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. 41).
Both pumps are set to "master" and "MA" flashes on the displays of
both electronic modules.
WILO SE 04/2020