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2. General
2.1 Application
The KESSE Staufix SWA 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 wa-
stewater from backing up the drainage
pipe during backwater / flooding. The
FKA should be kept in good operating
condition and should be accessible at all
times. During normal operating conditi-
ons, the motorized backwater flap as all
as the manually lockable backwater flap
are in the open position. The system is
equipped with an optical probe that is au-
tomatically closed when backwater is de-
tected. When the backwater occurrence
is over, the motorized flap opens itself au-
tomatically. The system is also equipped
with a second backwater flap that can be
manually closed and locked using the
manual closure and locking lever.
In addition, the manually operated back-
water flap offers a ‘neutral’ position (the
unit is shipped with the flap in the ‘neutral’
position). During the construction phase,
the installed Staufix FKA offers backwater
protection with the manually operated
flap 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 Staufix FKA delivery consists of a
body / housing with cover including the
emergency closure lever (closure lever not
included with a Controlfix®), and installa-
tion 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 backwater
flap.
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.010-845).
2.3 Pre-installation tips
During the building’s construction phase
only the body of the system will be instal-
led and connected to the building’s drai-
nage pipe (as discussed in Section 3).
Normally at this time power is not available
in the building meaning the Staufix 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 construc-
tion phase of the building is complete). It is
important that the electrical components
of the Staufix FKA (contained in the elec-
trical package) be properly stored (safe
and dry) until they are ready for installati-
on.
A function test according to point 4.3
should be conducted before commissio-
ning.
During the time period after the instal-
lation of the Staufix FKA body and befo-
re the Staufix FKA is connected to the
building’s power source, the following
Staufix FKA settings or positions are
possible:
A) ocked position
(Illustr. 1 – manually ope-
rated backwater flap is in the closed and
locked position). The red closure lever
should be pushed down into the locked po-
sition. This provided a full lockage or closure
of the building’s wastewater pipe. In this po-
sition no drainage fixtures connected to the
Staufix FKA can be drainage as the backwa-
ter flap is in the closed (locked) position. With
the position the building is fully protected
against backwater flooding.
B)Fully open position (Illustration 2 – back-
water flap 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 freely
flow through the backwater valve. In this
po-
sition none of the fixtures connected to the
Staufix FKA are protected from backwater!
C)Construction phase position (Illustr. 3 –
backwater flap is in the vertical free handing
position). 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 flap is in the vertical
(free hanging) position and acts as a single
flap backwater protection valve for the buil-
ding. The motorized backwater flap is not
in service and provides no protection. In
this position, drainage fixtures connected
to the Staufix FKA can be drained and at
the same time are protected against back-
water.
Before the Staufix FKA is fully operable,
we recommend the following settings:
- If it is certain that no drainage fixtures
connected to the Staufix FKA will be used
during the building phase, both the ope-
rational and the emergency backwater
flaps should be in the closed position (see
paragraph A above). If the drainage fixtu-
res connected to the Staufix FKA need to
be in service during the building phase,
both the operational and the emergency
backwater flaps should be in the tempor-
ary open (see paragraph C above).
- It should be noted that the backwater
flap will be prevent backwater (be water-
tight) only if the wastewater contains no
debris or raw sewage.
Illustration 2
Illustration 3
Illustration 1
Emergency flap closed and locked by hand
Operational flap in the open position
Backwater flap in the free hanging position