K4100714000001-00 / 05.2017
8
Flow through the safety group
With the KEMPER basic module the water is
conducted through the outer annular gap
into chamber 1 of the safety group housing.
From there the water passes to chamber 2,
where the main isolating valve is situated.
Adjoining this, in chamber 3, is the backflow
preventer, which prevents any backflow of
the water.
Situated in chamber 4 is an additional
maintenance valve, which isolates zone 3
necessary for maintenance purposes.
The expansion water is at full pressure here
against the safety valve and is re-conducted
through the central opening (5) into the
basic module, where it is optionally possible
to display the outlet-side pressure by means
of a pressure gauge.
Maintenance
The installed backflow preventer
must be inspected annually and
the safety valve bi-annually (DIN 1988- 8).
To carry out maintenance work, it is
possible to isolate the piping upstream of
the safety group.
Depending on how the safety valve is
installed, it is necessary to drain the
drinking
water
heater
prior
to
the
maintenance work. The safety group should
therefore be situated above the highest
attainable water level of the drinking water
heater.
6.1 Maintenance of the backflow preventer
Close off the piping in flow direction
upstream of the backflow preventer by
means of the main isolating valve (A).
Open
the
backflow
preventer
test
connection (F) to determine whether any
water emerges. The backflow preventer is
tight if no water emerges from the test
connection after the drainage of chamber 2.
If the backflow preventer is leaky,
additionally close the maintenance valve
(B),
remove
the
defective
backflow
preventer cartridge via the backflow
preventer maintenance hole (D) and replace
it with a new backflow preventer cartridge
(see spare parts list). Upon completion of
the maintenance work, close the isolating
valves again. When inspecting the backflow
preventer, the maintenance procedure must
be repeated.
6.2 Maintenance of the safety valve
While the system is operating, turn the
handwheel of the safety valve (C) in
clockwise direction until the water that is
present drains via the funnel. The valve can
be re-closed by turning the handwheel
again. This does not alter the pre-set
pressure. Should no water emerge, then the
safety valve must be replaced.
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Gebr. Kemper GmbH + Co. KG
Harkortstr. 5, D-57462 Olpe
Tel. +49 2761 891-0 | Fax -175
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