Connecting The Air Hoses - Graf KLARO Easy Notice D'installation

8. Connecting the air hoses

The ventilation system and the three air lift pumps must be connected to the solenoid 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. 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
connection (red) with Teflon tape.
In order to avoid confusion, the lifters, the ventilation downpipe and the four connectors on the switch
cabinet are all colour coded:
Feed lifter
Stainless steel ventilation
Outflow lifter
Excess sludge lifter
As a general rule, the connections with the same colours are to be attached to one another and fixed with
hose clamps. Hoses can be supplied in the relevant colours.
Once the hoses have been laid and attached, the empty pipe must be sealed in
order to avoid gas exchange between the wastewater treatment system and the
surroundings of the cabinet (moisture, odours).
Seal empty
pipe
Hose connections should ideally be carried out using the optional accessory, hose sealing
cap DN 100 with hose connector 3x13 mm, 1x19 mm (art. no. 107613).
If PU foam is used for sealing, the hose surfaces and pipe walls are to be cleaned with water, and should
be dampened slightly with water before foaming; when foaming, make sure that each hose is covered on
all sides with PU foam. To ensure good insertion of foam and proper coating of the hoses, these should
be moved slightly in a longitudinal direction when inserting the PU foam.
8. Connecting the air hoses
red

blue

black

white

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