Cold water installation
A
B
C D
S
M
E
F
G H KLM G
N
G M
P G R N
O
For connection locations, see the relevant connection set
A
DHW
B
DHW circulation pipe
C
DHW circulation pump
D
Spring-loaded check valve
E
Visible discharge pipe outlet point
F
Safety valve
G
Shut-off valve
H
Flow regulating valve
(We recommend installation and adjustment of the max. water
flow rate in accordance with the peak draw-off rate of the DHW
cylinder (see "Specification"))
K
Pressure gauge connector
L
Non-return valve
M
Drain outlet
N
Cold water
O
Drinking water filter
P
Pressure reducer
R
Non-return valve/pipe separator
S
Diaphragm expansion vessel, suitable for potable water
Note
The DHW circulation pump connection set (accessories) contains a
DHW circulation pump
C
and check valve
D
. The components are
installed in the boiler.
Safety valve
The safety valve
must
be installed.
We recommend installing the safety valve above the top edge of the
cylinder. This protects the valve against contamination, scaling and
high temperatures. It also means that the DHW cylinder does not
need to be drained when working on the safety valve.
DHW circulation
DHW circulation pipes increase DHW convenience and reduce water
consumption. These benefits result from the immediate availability of
DHW at the tap/draw-off point.
However, poor thermal insulation of the DHW circulation pipe can
lead to substantial heat losses.
From a
pipe length
of
7 m
upwards, we recommend the installation
of a DHW circulation pipe with appropriate thermal insulation in
accordance with the Energy Saving Ordinance. The Energy Saving
Ordinance specifies that the DHW circulation pipe should include a
circulation pump, check valve and time switch for stopping DHW cir-
culation during the night.
Only use the DHW circulation pump connection set, available as an
accessory, for installation in the boiler. The circulation pump is then
controlled by the boiler control unit.
The flow rate of the DHW circulation pump must not exceed
1.5 l/min
.
Installation scheme for DHW circulation, see page 131.
Design information
(cont.)
VITODENS
VIESMANN
131
5853906
8
Summary of Contents for Vitodens 200-W B2HE
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