19
A
B
C
D
S
M
E
F
G H K L M G
N
G M O P G RN
T
Fig. 16
A
DHW
B
DHW circulation pipe
If no DHW circulation is being connected, seal the
relevant connection.
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
K
Pressure gauge connection
L
Non-return valve
M
Drain valve
N
Cold water
O
Drinking water filter
P
Pressure reducer
R
Non-return valve/pipe separator
S
Expansion vessel, suitable for potable water (not
CH)
T
Automatic thermostatic mixing valve (on site, for
DHW temperatures > 60 °C)
The safety assembly to DIN 1988 is available as an
accessory. The safety assembly contains the following
components:
■
Shut-off valve
■
Diaphragm safety valve
■
Non-return valve and test connector
■
Pressure gauge connector
Information on drinking water filter
According to DIN 1988-2, a drinking water filter must
be installed in systems with metal pipework. We also
recommend the installation of a drinking water filter
when using plastic pipes to DIN 1988, to prevent con-
taminants entering the DHW system.
Information on the automatic thermostatic mixing
valve
The DHW heat pump can heat drinking water to above
60 °C. Therefore, an automatic thermostatic mixing
valve must be fitted in the DHW pipe to protect against
scalding.
Information on the safety valve
Install a safety assembly to DIN 1988 (DN 15 (R ¾)/
1 MPa) at the cold water connection.
If no safety assembly to DIN 1988 is installed, equip
the system with a type-tested diaphragm safety valve
as protection against excess pressure.
Installation information:
■
Install the safety valve in the cold water line. Ensure
it cannot be shut off from the DHW cylinder.
■
There must be no constrictions in the pipework
between the safety valve and the DHW cylinder.
■
Never seal off the safety valve discharge pipe.
Ensure that any expelled water is safely and visibly
drained into a drainage system. Position a sign close
to the safety valve discharge pipe, or ideally on the
safety valve itself, with the following inscription: "For
safety reasons, water may be discharged from the
discharge pipe during heating. Never seal off."
■
Install the safety valve above the top edge of the
DHW heat pump.
■
Install the safety valve so it is free from the risk of
frost and connect it to an outlet pipe with a continu-
ous fall.
Technical requirements:
■
Permissible temperature: 3 to 65 °C
■
Permissible operating pressure: 1 to 10 bar (0.1 to
1 MPa)
Installation sequence
Connections on the DHW side
(cont.)
6136003
Installation
