Connecting The Air Hoses; Mounting The Graf Empty Pipe Seal Of Pe Foam - Graf 106589 Instrucciones Para La Instalación Y El Montaje

4. Installing and connecting the PP switch cabinet
4.2

Connecting the air hoses

The hoses for the ventilation system and the air lift pumps must be connected to the valve strip in the
switch cabinet.
For the lifters, hoses with 13 mm inner diameter are required, while a hose with 19 mm inner diameter is
needed for the ventilation system. When connecting, make sure that the hoses are attached to the correct
connectors.
To avoid leakage, we recommend warming the hoses and additionally sealing the feed hose con-
nection (red) with Teflon tape.
In order to avoid confusion, the lifters in the setting-up kit, the ventilation downpipe and the four connect-
ors on the switch cabinet are all colour coded:
Feed lifter
Stainless steel ventilation
Outflow lifter
Excess sludge lifter
As a general rule, the connectors are to be attached to the same coloured hoses and fixed with hose
clamps.
We recommend the GRAF empty pipe seal of PE foam (item no. 107887).
4.3

Mounting the GRAF empty pipe seal of PE foam

.
Insert the hoses from the empty pipe into the holes
in the empty pipe seal.
Cut off the end of the hose to remove this plug.
Once the hoses have been laid and attached, the empty pipe must be
sealed in order to avoid gas exchange between the wastewater treat-
ment system and the surroundings of the cabinet (moisture, odours).
red
blue
black
white
Push the hose through the thin top layer. A plug of
material remains stuck in the end of the hose.
Push the empty pipe seal into the empty pipe to
seal this tightly.
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