Dhw Connection And Safety Assembly; Filling The System - STIEBEL ELTRON HSBC 300 cool Operation And Installation

iNSTAllATiON
installation
10.2.3 Hydraulic connection
Note
f Observe the details specified in the chapter "Installa- f
tion / Specification / Hydraulic diagrams".
f Thoroughly flush the pipes before connecting the heat pump. f
Foreign bodies (e.g. welding pearls, rust, sand, sealant, etc.)
can impair the operational reliability of the heat pump.
f Install the heating water pipes (see chapter "Specification / f
Dimensions and connections").

10.3 DHW connection and safety assembly

10.3.1 Safety instructions
Material losses
!
The maximum permissible pressure must not be exceed-
ed (see chapter "Specification / Data table").
Material losses
!
Operate the appliance only with pressure-tested taps.
Material losses
!
Install the T&P valve.
Material losses
!
The tundish and the discharge pipe should be installed
away from electrical devices.
Note
If secondary return circuits are used then an additional
expansion vessel may be required.
Cold water line
Galvanised steel, stainless steel, copper and plastic are approved
materials.
Material losses
!
A safety valve is required.
DHW line, DHW circulation line
Stainless steel, copper and plastic are approved materials.
10.3.2 Installing the DHW circulation line, if applicable
A DHW circulation line with external DHW circulation pump can
be fitted to the DHW circulation connection (see chapter "Specifi-
cation / Dimensions and connections").
f Remove the sealing cap from the DHW circulation connection f
(see chapter "Specification / Dimensions and connections").
f Connect the DHW circulation line. f
16 | HSBC 300 cool (AU)
10.3.3 DHW connection and safety assembly
f Flush the pipes thoroughly. f
f Install the DHW outlet line and the cold water inlet line (see f
chapter "Specification / Dimensions and connections"). Con-
nect the hydraulic connections with flat gaskets.
f Install a type-tested safety valve in the cold water inlet line. f
Please note that, depending on the supply pressure, you may
also need a pressure reducing valve.
f Size the drain pipe so that water can drain off unimpeded f
when the safety valve is fully opened.
f The safety valve drain aperture must remain open to f
atmosphere.
f Install the safety valve drain pipe with a constant fall to the f
drain.

10.4 Filling the system

Heating circuit water quality
Carry out a fill water analysis before filling the system. This analy-
sis may, for example, be requested from the relevant water supply
utility.
To avoid damage as a result of scaling, it may be necessary to
soften or desalinate the fill water. The fill water limits specified
in chapter "Specification / Data table" must always be observed.
f Recheck these limits 8-12 weeks after commissioning and f
during the annual system service.
Note
With a conductivity >1000 μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
If you treat the fill water with inhibitors or additives, the
same limits apply as for desalination.
Note
Suitable appliances for water softening, as well as for
filling and flushing heating systems, can be obtained via
trade suppliers.
Material losses
!
Never switch on the power before filling the system.
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