DHW circulation
DHW circulation pipes increase DHW convenience and reduce water
consumption.
These advantages result from the immediate availability of hot water
at the tap/draw-off point.
However, poor insulation of the DHW circulation line can lead to sub-
stantial heat losses.
From a
line length
of
7 m
upwards, we recommend the installation of
DHW circulation with appropriate thermal insulation in accordance with
the Energy Savings Ordinance [Germany].
In accordance with the Energy Savings Ordinance [Germany], the
DHW circulation line should include a circulation pump, check valve
and time switch for shutting down circulation during the night.
With the Vitoladens 333-F, only use the DHW circulation pump con-
nection set available as an accessory for fitting in the boiler. For this,
the circulation pump is controlled by the boiler control unit.
A
B
C
Vitoladens 300-W with DHW cylinder, below
A
DHW
B
Cold water
C
DHW circulation
B
C
A
Vitoladens 300-W with DHW cylinder, adjacent
A
DHW
B
Cold water
C
DHW circulation
Vitoladens 333-F (DHW circulation pump connection set, accessory)
A
DHW
B
DHW circulation
C
DHW circulation pump (in the DHW circulation pump connection
set)
D
Check valve (in the DHW circulation pump connection set)
E
Cold water
Design information
(cont.)
52
VIESMANN
VITOLADENS 300-W
/
VITOLADENS 333-F
5
5822 425 GB
