
12
2. General
2.1 Application
The KESSEL Staux FKA backwater
valve, designated as a DIN EN 13564
Type 3 backwater valve, is designed to
be installed in wastewater drainage pipes
with or without raw sewage (WC connec-
tion). The backwater valve prevents was-
tewater from backing up the drainage
pipe during backwater / ooding. The
FKA should be kept in good operating
condition and should be accessible at all
times. During normal operating condi-
tions, the motorized backwater ap as
all as the manually lockable backwater
ap are in the open position. The system
is equipped with an optical probe that is
automatically closed when backwater is
detected. When the backwater occurren-
ce is over, the motorized ap opens itself
automatically. The system is also equip-
ped with a second backwater ap that
can be manually closed and locked using
the manual closure and locking lever.
In addition, the manually operated back-
water ap offers a ‘neutral’ position (the
unit is shipped with the ap in the ‘neutral’
position). During the construction phase,
the installed Staux FKA offers backwa-
ter protection with the manually operated
ap which is in the free hanging position –
this protection is offered even before the
system is connected to electrical power.
DIN EN 12056 and DIN EN 13564 should
be followed which regulated the drainage
of building and use of backwater valves..
2.2 Contents of Delivery
The Staux FKA delivery consists of a
body / housing with cover including the
emergency closure lever (closure lever not
included with a Controlx®), and installati-
on and operating manual (Article Number
010-842), a see-thru test funnel as well as
an Electrical package (separate box con-
taining the electrical parts of the system).
Please carefully store this additional ac-
cessories before they are installed to the
system.
The electrical package consists of:
1.The optical probe as well as the motor
which operates the motorized backwa-
ter ap.
2.A control unit (230 V, 50 Hz, Protection
Class IP 54) with back up battery feature
(twin 9-volt batteries) – this offers an ad-
ditional 2 hours of operation in the case
of a power outage. Also included is the
installation and operational manual for
the control unit (art.- nr.016-003).
2.3 Pre-installation tips
During the building’s construction phase
only the body of the system will be in-
stalled and connected to the building’s
drainage pipe (as discussed in Section 3).
Normally at this time power is not available
in the building meaning the Staux FKA’s
motor is not in service (see chapter 4) and
commissioning (see chapter 5) cannot yet
take place.
The electrical components of the system
(motor, optical probe and control unit)
should not be connected until the system
is commissioned (after the major const-
ruction phase of the building is complete).
It is important that the electrical compo-
nents of the Staux FKA (contained in the
electrical package) be properly stored
(safe and dry) until they are ready for in-
stallation.
A function test according to point 4.3
should be conducted before commissio-
ning.
During the time period after the ins-
tallation of the Staux FKA body and
before the Staux FKA is connected to
the building’s power source, the follo-
wing Staux FKA settings or positions
are possible:
A)Locked position
(Ill. 1 – manually ope-
rated backwater ap is in the closed and
locked position). The closure lever should
be pushed down into the locked position.
This provided a full lockage or closure of the
building’s wastewater pipe. In this position
no drainage xtures connected to the Stau-
x FKA can be drainage as the backwater
ap is in the closed (locked) position. With
the position the building is fully protected
against backwater ooding.
B)Fully open position (Illustration 2 – back-
water ap is in the fully open position). The
red closure lever should be in the open po-
sition. The backwater valve currently proved
no backwater protection to the building and
any wastewater from the building can fre-
ely ow through the backwater valve. In this
position none of the xtures connected to the
Staux FKA are protected from backwater!
C)Construction phase position (Ill. 3 – back-
water ap is in the vertical free handing po-
sition). The red manual closure lever is in
the ‘open’ position and the emergency clo-
sure device should be in the ‘neutral’ posi-
tion. In this ‘neutral’ setting the manually
operated backwater ap is in the vertical
(free hanging) position and acts as a single
ap backwater protection valve for the buil-
ding. The motorized backwater ap is not
in service and provides no protection. In
this position, drainage xtures connected
to the Staux FKA can be drained and at
the same time are protected against back-
water.
Before the Staux FKA is fully operable,
we recommend the following settings:
- If it is certain that no drainage xtures
connected to the Staux FKA will be used
during the building phase, both the ope-
rational and the emergency backwater
aps should be in the closed position (see
paragraph A above). If the drainage xtu-
res connected to the Staux FKA need to
be in service during the building phase,
both the operational and the emergency
backwater aps should be in the tempo-
rary open (see paragraph C above).
- It should be noted that the backwater
ap will be prevent backwater (be water-
tight) only if the wastewater contains no
debris or raw sewage.
Illustration 2
Illustration 3
Illustration 1
Emergency ap closed and locked by hand
Operational ap in the open position
Backwater ap in the free hanging position