STIEBEL ELTRON WPL-A 05 HK 230 Premium, Эксплуатация и установка

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iNSTALLATiON
installation
16 | WPL-A Premium www.stiebel-eltron.com
10.5 Oxygen diffusion
!
Material losses
Do not use open vented heating systems. Use oxygen
diffusion-proof pipes in underfloor heating systems with
plastic pipework.
In underfloor heating systems with plastic pipes that are per-
meable to oxygen and in open vented heating systems, oxygen
diffusion may lead to corrosion on the steel components of the
heating system (e.g. on the indirect coil of the DHW cylinder, on
buffer cylinders, steel radiators or steel pipes).
f
With heating systems that are permeable to oxygen, separate
the heating system between the heating circuit and the buff-
er cylinder.
!
Material losses
The products of corrosion (e.g. rusty sludge) can set-
tle in the heating system components, which may re-
sult in a lower output or fault shutdowns due to reduced
cross-sections.
10.6 Filling the heating system
Carry out a fill water analysis before filling the system. This analy-
sis may, for example, be requested from the relevant water supply
utility.
!
Material losses
To avoid damage as a result of scaling, it may be neces-
sary 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 commission-
ing, every time the system is topped up and during
the annual service.
Note
With a conductivity >1000 μS/cm, desalination treatment
is recommended in order to prevent corrosion.
Note
Suitable appliances for water softening and desalinating,
as well as for filling and flushing heating systems, can be
obtained from trade suppliers.
Note
Do not add inhibitors or additives to the filling water.
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.
f
Please note that antifreeze changes the density and
viscosity of the fill water.
Part number
MEG 10 Heat transfer medium as concentrate on
an ethylene glycol base
231109
MEG 30 Heat transfer medium as concentrate on
an ethylene glycol base
161696
10.6.1 Safety concept
!
WARNING Injury
A safety valve is built into the appliance. Only a safety
valve with the same opening pressure can guarantee the
correct functioning of the safety concept.
f Do not replace the safety valve with another valve
that has a different opening pressure.
f Always use original spare parts.
1
D
00000
90
34
8
1 Safety valve
A safety valve is built into the appliance. If the opening pressure is
exceeded, the safety valve will open. The escaping medium passes
into the condensate pan via a built-in hose.
Opening pressure [bar] Tolerance [bar]
2.5 +0.15 -0.35
Note
Only safety valves with an opening pressure of 3 bar may
be installed in the heating system.