12
JUDO HEIFI-TOP
Operation
5.3
Backwashing
The filter must be backwashed (cleaned) at
the prescribed intervals in order to remove
the dirt particles (see chapter “Backwashing
process”).
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
In the operating position the ball valve han-
dle (
6
) on the handwheel (
5
) is at the back of
the filter. The handwheel (
5
) must be turned
to the left up to the limit stop for backwash-
ing, so that the integrated ball valve handle
(
6
) is accessible from the front. During this
turning moveement the inlet valve is closed
internally and the dirt particles are brushed
by the round filter brush (
2
).
The filter is backwashed by opening the ball
valve.
Caution – risk of scalding!
During the backwashing the heating water
flows from the top downwards (reversed
flow) through the round filter brush (
2
), this
flushes the dirt particles downwards through
the open ball valve. After approx. 2 to 3 liters
of backwashing water have been flushed
through, the ball valve must be closed again
tightly. Turn the handwheel (
5
) back to the
right up to the limit stop. The filter is now in
the operating position. The ball valve handle
(
6
) is now back behind the filter (see fig. 7).
After backwashing the system pressure
must be checked and, if necessary, filling
water must be refed.
5.4
Backwashing interval
If the filter is installed retrospectively in old
heating systems the backwashing should be
carried out every 14 days until the back-
washing water clears. After that it suffices to
carry out the backwashing as for a new heat-
ing system, i.e. at the start and end of each
heating period.
5.5
Modifications / changes /
spare parts
Before working on the filter extending be-
yond pure operational controls, the filter
must be depressurised and left to cool!
5.5.1 Servicing / repair
Before working on the backwash filter ex-
tending beyond pure operational controls,
the backwash filter must be depressurised
and left to cool! Failure to observe this can
lead to an uncontrolled escape of water and
therefore lead to water damage in the build-
ing. Strictly comply with the instructions giv-
en in the “Installation” and “Maintenance”
chapters
.
5.6
Stoppages
ATTENTION
(see chapter “Safety information and
dangers due to non-compliance”)
If a filter has to be removed from the flange
or unscrewed, the chapter “Intended use“
has imperatively to be observed!
–
Protect the flange surfaces from dam-
age! Damaged flange surfaces cannot
close tight any longer. As a result, es-
caping water can damage the building
and installations.
–
Ensure that no dirt can get into the filter!
Upon recommissioning this dirt can get
into contact with the drinking water and
be discharged into the drinking water.
The health of people consuming polluted
water is at risk.
