Stop options
n
Stop flushing – when flush volume is reached
This stop function can be combined with all above-named start func‐
tions. The maximum flush volume can be set and, if required, defined
by means of the integrated calculation tool.
With very short intervals or very large flush volumes, the maximum
flush volume is reduced to ensure that the other water section will be
flushed as well.
Flushings are performed with a set flush volume of 1 to 300 l (factory
setting: 25 l), see
„Determining the flush volume“ on page 43
.
n
Stop flushing – when temperature is constant and / or flush volume
is reached
This stop function can be combined with all above-named start func‐
tions. Flushing stops as soon as a constant temperature is reached
within the minimum / maximum flush volume. The flush volume can
be set from 1 to 300 litres. See the table below.
If no constant temperature is reached after flowthrough of the max‐
imum flush volume, the flushing stops and an entry reporting an
improperly performed flushing is written to the log.
The flushing station goes to warning status, the status LED emits
yellow light. In this case, Viega recommends to adjust the flushing
parameters. However, the next flushings are still performed at the set
values. If a constant temperature is reached at less than the max‐
imum flush volume, the flushing station will automatically return to
regular mode.
n
Stop flushing – when target temperature and flush volume are
reached
Flushing stops as soon as the selected target temperature is
reached. The minimum / maximum flush volume can be set from 1 to
300 litres. See the table below.
If the target temperature is not reached after flowthrough of the max‐
imum flush volume, the flushing stops and a fault alarm is issued (red
LED at the control flashes, an entry is written to the log).
The next flushings are performed pursuant to the set start and stop
conditions.
To determine the required flush volumes for temperature-
dependent flushing, Viega recommends to perform a test
flushing.
Usually, the required flush volume is calculated in the planning phase of
the system.
Sanpress pipes
d x s [mm]
Volume per metre of pipe [l/m]
12 x 1.0
0.1
15 x 1.0
0.1
Determining the flush volume
Handling
Flushing station with Viega technology
43
