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451905.66.02 · FD 9912
EN-7
DHW 300D - DHW 300D+
English
5
Assembly
5.1 Connecting the water pipes
The water connections (see scaled diagram (Cap. 1 on pag. II))
are located at the rear of the unit.
NOTE
º
Circulation pipe
For energy efficiency reasons, a circulation pipe should not be
used if this can be avoided. If a circulation pipe is installed in
the domestic hot water distribution system, a valve or a similar
device must be provided as shut-off facility to avoid
unnecessary energy losses. Circulation is enabled according
to use (time or requirement control).
The nominal pipe widths for the on-site sanitary installation
must be determined by taking into account the available water
pressure and any pressure drops expected to occur in the pipe-
work.
Technical regulations for domestic water installation are to be
observed. The nominal pipe widths for the on-site sanitary in-
stallation must be determined taking into account the building-
specific requirements and the valid directives and regulations.
Any necessary safety devices, such as pressure reducing
valves, must be installed according to the specific require-
ments.
Both rigid and flexible water pipes may be used. Observe the
corrosion behaviour of the pipework materials used in order to
avoid corrosion damage (see section Commissioning).
NOTE
º
Domestic hot water, cold water and circulation connections:
These pipe nipples contain plastic inserts, the purpose of
which is to protect against corrosion (in particular to the pipe
nipple flange surfaces). These plastic inserts remain in their
positions after installation.
ATTENTION!
!!
When installing the on-site pipework, ensure that the pipes
are not contaminated (flush pipes before connecting the
domestic hot water heat pump if necessary).
5.2 Connecting the condensate
pipe
The condensate hose is routed through the cladding at the rear
of the device. It should be routed in such a way that the con-
densate produced (during heat pump operation) can flow away
freely.
There is a pressureless seal valve at the end of the condensate
hose, which must be
relocated accordingly
if the condensate
hose is shortened (the valve can be easily removed and re-in-
serted). The condensate should be drained into a siphon (also
refer to the maintenance information in section 8.1).
NOTE
º
The sealing lip valve must be used to prevent damage from
condensate.
5.3 Electrical connection
The domestic hot water heat pump is wired ready for use;
power is supplied via the power supply, which is plugged into
an earthed wall socket (~230 V, 50 Hz). This socket must remain
accessible after installation. In order to control external devices,
e.g. the 2nd heat generator, solar circulating pump or collector
temperature sensor, a separate cable must be connected to the
device via an available cable gland and strain relieved. Do this
by opening the device cover as described in Cap. 3.5 on pag. 6.
The relevant connection points of the components can be
found in the electrical circuit diagram Cap. 3 on pag. V and the
electrical documentation.
5.4 Air duct connection (optional)
The device is designed for connecting an EPP air duct (individ-
ual components available as accessories DN 160 inside). The
90° position of the two connecting stubs means that a wide
range of ducts are possible.
Air outlet
Air inlet
