Filling And Bleeding - Wilo CronoLine-IL Notice De Montage Et De Mise En Service

8.1

Filling and bleeding

Installation and operating instructions Wilo-IL/-DL/-BL
• Fill and bleed the system as required.
CAUTION! Damage to the pump!
Dry running will destroy the mechanical seal.
• Make sure that the pump does not run dry.
• To avoid cavitation noise and damage, a minimum intake pressure
must be guaranteed at the suction port of the pump. This minimum
intake pressure depends on the operating situation and the duty point
of the pump, and must be defined accordingly. The main parameters
for defining the minimum intake pressure are the NPSH of the pump
at its duty point and the vapour pressure of the fluid.
• Bleed the pumps by releasing the vent screws (Fig. 1/2/3, Item 1.31).
WARNING! Danger due to extremely hot or extremely cold pressu-
rised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the vent 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 vent screw.
WARNING! Risk 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 and gloves when working.
WARNING! Risk 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 and gloves.
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.
• Switch on briefly and check whether the direction of rotation corre-
sponds to the arrow on the motor. If the direction of rotation is incor-
rect, proceed as follows:
• for direct starting: Swap the 2 phases on the motor terminal board
(e.g. L1 for L2),
• for Y-V starting: Swap the thread start and thread end of 2 windings
on the motor terminal board (e.g. V1 for V2 and W1 for W2).
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