Visual Inspection Of Accessories; Visual Inspection Of The Housing For Wear - Wilo -Rexa FIT Instrucciones De Instalación Y Funcionamiento

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reduce the risk of total breakdown. In this regard, it is re-
commended to use remote monitoring for regular in-
spections.
9.5.2 Visual inspection of the connection cable
Check connection cable for:
▪ Bubbles
▪ Cracks
▪ Scratches
▪ Abrasion
▪ Pinch points
If damage is identified on the connection cable, decom-
mission the pump immediately! Have the connection
cable replaced by Wilo customer service. Only operate
the pump up again once the damage has been properly
remedied!
CAUTION! Water may penetrate into the pump due to
the damaged connection cable! Water ingress leads to
total failure of the pump.
9.5.3

Visual inspection of accessories

Accessories must be checked for:
▪ Correct fixation
▪ Smooth function
▪ Signs of wear, e.g. cracks caused by frequencies
Any defects detected must be repaired immediately or
the accessories must be replaced.
9.5.4

Visual inspection of the housing for wear

The housing parts are not allowed to have any apparent
damage. Contact customer service if defects are detec-
ted!
9.5.5 Function test of the monitoring device
To test resistances, the pump must be cooled down to
the ambient temperature!
9.5.5.1 Test the resistor of the temperature sensor
Measure the resistor of the temperature sensors with an
ohmmeter. The bimetallic strips must have a measured
value of 0 Ohm (passage).
9.5.5.2 Testing the resistor of the external electrode for seal-
ing chamber control
Measure the resistor of the electrode with an ohmmeter.
The measured value must approach "infinity". For values
≤ 30 kOhm, if there is water in the oil – change the oil!
52
Maintenance and repair
9.5.6 Oil change in sealing chamber
WARNING
Operating fluid under high pressure!
A pressure of several bar can build up in the motor!
This pressure escapes when the screw plugs are
opened. If screw plugs are opened without due cau-
tion, they can be ejected at high speed! To avoid inju-
ries, observe the following instructions:
• Adhere to the prescribed sequence of work steps.
• Unscrew the screw plugs slowly, but never un-
screw them completely. As soon as the pressure
escapes (audible whistling or hissing of air), stop
turning the screw plug any further!
• When the pressure has completely dissipated,
fully unscrew the screw plugs.
• Wear closed safety goggles.
WARNING
Scalding from hot operating fluids!
Hot operating fluids can also spray out when pressure
is released. This can result in scalding! To avoid inju-
ries, the following instructions must be observed:
• Allow the motor to cool down to the ambient
temperature before opening the screw plugs.
• Wear closed safety goggles or face protection
and gloves.
Fig. 9: Sealing chamber: Oil change
1 Screw plug sealing chamber
‡
Protective equipment has been put on!
‡
Pump has been dismantled and cleaned (decontaminated
if required).
1. Position the pump horizontally on a firm surface. The
screw plug points upwards. WARNING! Risk of hands
1
WILO SE 2019-02