Changing The Motor Liquid On Se Pumps - Grundfos SE Instrucciones De Instalación Y Funcionamiento

8.1.3 Changing the motor liquid on SE pumps

The cooling system has four plugs as shown in figures 15,
17.
Plug A is used for filling motor liquid when the pump is in vertical
position.
Plug B is used for checking the liquid level when the cooling
system is being filled in vertical position.
Plug D is used for draining the motor liquid.
Plug C is used both for checking the level of motor liquid and for
filling motor liquid when the pump is in horizontal position.
Fig. 15 SE pump, motor-liquid level, top view
A
C
Fig. 16 SE pump, bottom view
Draining the motor liquid
16 and
Tip the pump to horizontal position so that plug D is pointing
downwards. See fig. 17. Place a container under the pump to
collect all the drained-off motor liquid. Due to possible pressure
build-up in the cooling system, open plug C cautiously and then
remove plug D. Allow all the motor liquid to drain from the
housing into the container.
Replace the O-ring with a new ring, insert plug D and tighten
securely.
Filling motor liquid, pump in vertical position
While the pump is in vertical position, remove plug B so that air
inside the pump can escape, fill the shaft seal housing with motor
liquid through hole A until the motor liquid reaches the level
indicated in fig. 15. Replace the O-rings with new rings, insert the
plugs and tighten securely.
Filling motor liquid, pump in horizontal position
Place the pump horizontally with plug D mounted and pointing
downwards. Fill the shaft seal housing with motor liquid through
hole C until the motor liquid reaches the level indicated in fig. 17.
Replace the O-ring with a new ring, insert plug C and tighten
securely.
A
D
Fig. 17 SE pump, horizontal view
WARNING
Pressurized system
Death or serious personal injury
- When loosening plug B or C to check the liquid
level, note that pressure may have built up in the
cooling system. Do not remove the plug until the
pressure has been fully relieved.
C
A-A
C
C
D
19