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iNSTallaTiON
installation
11.4.3 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.
f Install a type-tested safety valve in the cold water supply
f
line. 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.
11.5 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.
Material losses
!
Never switch on the power before filling the system.
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.
11.5.1 Flushing out the hot water system
f Before turning on the water supply, open all taps. Allow
f
the system to fill and flush out all flux and debris from the
installation.
11.5.2 Filling the heating system
Note
Fill the heating system exclusively via the left-hand drain
& fill valve.
In the delivered condition, the 3-way diverter valve of the mul-
tifunction assembly is in its centre position, so that the heating
circuit and the heat exchanger for DHW heating are filled evenly.
10
| HSBB 180 Plus (GB)|HSBB 180 S Plus (GB)
When power is switched on, the 3-way diverter valve automatically
switches to heating mode.
To fill or drain the system later, you must first place the 3-way
diverter valve into its centre position.
To set the heat pump manager:
f With the MENU key, call up the main menu.
f
f Select the menu or value and confirm with OK:
f
„
DIAGNOSIS
…
RELAY TEST SYSTEM
…
…
DRAIN HYD
f Fill the heating system via the left-hand drain & fill valve.
f
f Vent the pipework.
f
11.5.3 DHW cylinder filling
Material losses
!
Some fluxes used to solder pipes and fittings need to be
flushed out with hot water.
f Heat the cylinder to its normal operating tempera-
f
ture and flush all pipe work with hot water to ensure
all flux and debris is removed from the system.
f Fill the DHW cylinder via the cold water connection in com-
f
pliance with the UK Water Supply (Water Fittings) Regula-
tions 1999, Section 8 G24.
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
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