Wilo VeroLine-IPS 20, Installation And Operating Instructions Manual

English

28

WILO SE 11/2013

8

Commissioning

Safety

DANGER! Risk of fatal injury!
Failure to install safety devices on the motor, terminal box or on 
the coupling can cause electrical shock or contact with rotating 
parts, potentially resulting in life-threatening injuries.

• Before commissioning and after maintenance work, all safety 

devices (such as terminal box covers or coupling covers) that were 
removed must be reinstalled.

• Keep a safe distance during commissioning.
• Always wear protective clothing, protective gloves and protective 

goggles when working.

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! 
• In the case of high water temperatures and system pressures, allow 

the pump to cool down before all work.

• Always wear protective clothing, protective gloves and protective 

goggles when working.

• The area near the pump unit must be kept free of contaminants to 

eliminate the chance of a fire or an explosion due to contact of con-
taminants with hot unit surfaces.

8.1

Filling and venting

• Prime and vent the unit correctly.

CAUTION! Risk of damaging the pump!

• Protect the terminal box from any water escaping when venting.

CAUTION! Risk of damaging the pump! 
Running dry will destroy the mechanical seal.

• Make sure that the pump does not run dry.

• To avoid cavitation noises and damage, a minimum intake pressure 

must be guaranteed at the suction port of the pump. This minimum 
intake 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 intake pressure are the NPSH of the pump 
at its duty point and the vapour pressure of the fluid.

• Vent the pumps by loosening the venting screw (Fig. 1, Pos. 1).

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 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.

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 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.

8.2

Checking the direction of rotation

• Switch on briefly and check whether the direction of rotation corre-

sponds to the arrow on the flanges. If the direction of rotation is 
incorrect, proceed as follows:
• Swap the 2 phases on the motor terminal boar (e.g. L1 for L2).