Filling The System - STIEBEL ELTRON HSBC 300 cool Operation And Installation

INSTALLATIoN
Installation
1 Retainer
2 Insulated connection pipes
f Install the connection pipes in sequence, starting on the left f
or right depending on the positioning of the appliance.
f Insert the connection pipes through the retainer from below. f
f Secure the connections to the appliance using the union nuts. f
f Connect the pipes of the pipe assembly to the domestic pipe- f
work system.
10.3.3 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
10.3.4 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.
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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.
1
To avoid damage as a result of scaling, it may be necessary to
soften or desalinate the fill water. The fill water limits specified
2 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.
10.4.1 Filling the heating system
f Fill the heating system via the drain valve. f
f Vent the pipework. f
10.4.2 DHW cylinder filling
f Filling the DHW cylinder via the "cold water inlet" connection. f
f Open all downstream draw-off valves until the appliance is f
full and the pipework is free of air.
f Adjust the flow rate. For this, observe the maximum permis- f
sible flow rate with a fully opened tap (see chapter "Specifi-
cation / Data table"). If necessary reduce the flow rate at the
butterfly valve of the safety assembly.
f Carry out a tightness check. f
f Check the safety valve. f
HSBC 300 cool | HSBC 300 L cool | 53