Dosing unit GRANUDOS Type Flex-CPR Touch XL,
Type Flex-Touch and Type Flex-S5
Index: 01 Change date: 11/10/2023
OI No.: BA SW 022-01 Granudos Flex Dosiereinheit EN.docx
Page 45 of 68
5.2.5
Venting of the booster pump and the piping to the GRANUDOS
Overview dust protection housing of the booster pump
Description
The booster pump and the piping must be carefully vented prior to each commissioning of the GRANU-
DOS Flex. To prevent the booster pump from running dry, pay attention to the following during instal-
lation and commissioning:
Procedure
a)
Push the two clamp rings to the side and remove both parts of the housing.
b)
Manually check if the booster pump can be turned with ease. To do so, you can check the
smooth running of the shaft at the fan propeller in the back, using a screwdriver. If the shaft
does not turn smoothly, the mechanical seal is clotted. Try to loosen it by abruptly turning it
back and forth. If this is not possible, the booster pump must be deinstalled and disassembled
to loosen the mechanical seal.
ATTENTION!
If the pump is switched on with a blocked mechanical seal, the booster pump’s failure is
inevitable.
c)
During commissioning, open the ball valves at the water removal point and the dosing point
as well as the ball valve inlet (05) at the dirt filter and wait until the flushing tub is half full. This
ensures that water has flowed through the pump and the pump has been vented. Now open
the shut-off valve (16) downstream of the cyclone. Plug the safety plug in a corresponding
power socket and turn on the device at the main switch (02).
d)
The piping to the GRANUDOS must be carefully vented. Observe the dirt filter for this purpose.
If the dirt filter’s water level shows a significant drop when the pump is switched on, turn off
the GRANUDOS, open the venting screw on top of the dirt filter and allow water to flow back
into the dirt filter before switching the device on again.
If necessary, repeat the process several times until the dirt filter remains full; a few air bubbles
in the upper dirt filter area are inconsequential.
ATTENTION!
If the pump draws air while in operation or during unmonitored activation, the pump’s me-
chanical seal will run dry, overheat and start to leak. This can be the case with an installation
Figure 33: Dust protection housing
Clamp ring, 2x
Dust protection housing, 2-parts
Summary of Contents for GRANUDOS Flex-CPR Touch XL
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