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INSTALLATIoN
Installation
11.4.2 Fitting the DHW circulation line (optional)
A DHW circulation line with external DHW circulation pump can
be fitted to the DHW circulation connection (see chapter "Specifi-
cation / Dimensions and connections").
1
2
3
4
5
1 Union nut
2 Insulating sleeve
3 DHW circulation line
4 Gasket
5 "DHW circulation" connection
f Remove the sealing cap from the DHW circulation connection
(see chapter "Specification / Dimensions and connections").
f Connect the DHW circulation line with the gasket, the insulat-
ing bushing and the flat gasket union nut.
11.4.3 DHW connection and safety assembly
f Flush the pipes thoroughly.
f Install the DHW outlet line and the cold water inlet line (see
chapter "Specification / Dimensions and connections"). Con-
nect the hydraulic connections.
f Install a type-tested safety valve in the cold water supply
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
when the safety valve is fully opened.
f The safety valve drain aperture must remain open to
atmosphere.
f Install the safety valve drain pipe with a constant fall to the
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
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.
34
| HSBB 180 Plus|HSBB 180 S Plus
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.
Note
The appliance offers frost protection for the connection
lines in regular operation.
In the event of prolonged power failure or when shutting
down, drain the DHW side of the appliance.
If it is not possible to detect power failures (for example
if the system is in a holiday home left vacant for extended
periods of time), the following protective measure can
be taken.
f Add a suitable concentration of ethylene glycol to
the fill water. (20-40 % by vol.)
f Please note that antifreeze changes the density and
viscosity of the fill water.
MEG 10 Heat transfer medium as concentrate on
an ethylene glycol base
MEG 30 Heat transfer medium as concentrate on
an ethylene glycol base
11.5.1 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.
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 Select the menu or value and confirm with OK:
DIAGNOSIS
RELAY TEST SYSTEM
DRAIN HYD
Part number
231109
161696
www.stiebel-eltron.com
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