Maintenance / Service; Mechanical Seal - Wilo IPL Manual De Instrucciones

English
• Check that the current input does not exceed the value indicated on the motor
data plate.
CAUTION!
The pump must not run for longer than 10 minutes with no flow (dead head).
WARNING!
Depending on the operating conditions of the pump or installation (fluid
temperature), the entire pump can become very hot or very cold.
Keep distance during pump operation!

9 Maintenance / Service

All servicing should be performed by an authorized service representative!
WARNING!
Dangers caused by electrical energy must be excluded.
All electrical work must be performed after the electrical supply has been
switched off and secured against unauthorized switching.
WARNING!
At high water temperatures and system pressure close isolating valves
before and after the pump.
First, allow pump to cool down.
WARNING!
Screws which have been tightened too hard can break off. Subsequently
separate parts and fragments can chip off and / or hot medium can spray.
Observe screw tightening torque specifications (see 9.3).

9.1 Mechanical seal

CAUTION!
Observe screw tightening torque specifications (see 9.3).
Slight dripping is likely to occur during the initial run-in period. A visual leakage
check should, however, be carried out from time to time in order to anticipate a
catastrophic seal failure and ensure in-time exchage of the seal. WILO offers a
repair kit containing all parts required for a repair.
9.1.1 Exchange of mechanical seal, Version with NEMA-motor (Fig. 1)
Removal:
• Switch off power supply to pump motor and secure against unauthorized
switching on.
• Close isolating valves at both pump ports,
12
Possible damage of the pump!
Risk of burning or freezing on if the pump is touched!
Electrical shock hazard!
Risk of scalding!
Risk of injury!
Possible damage of the pump!
Wilo AG 06/2005