Fitting The Water Connection And The Safety Assembly; Safety Instructions; Heating Or Solar Installation - STIEBEL ELTRON SBB 751 Bedienung Und Installation

INSTALLATION
PREPARING fOR INSTALLATION
9.6 Fitting the water connection and the safety
assembly

9.6.1 Safety instructions

Note
Carry out all water connection and installation work in
accordance with regulations.
Material damage
!
If a flanged immersion heater is fitted and plastic pipe-
work is used at the same time, observe chapter "Speci-
fication / Fault conditions".
Material damage
!
Operate the appliance only with pressure-tested taps and
valves.
Cold water line
Copper, steel or plastic pipework are approved materials.
Material damage
!
A safety valve is required.
DHW line
Copper or plastic pipework are approved materials.
9.6.2 Water connection
f Flush the line thoroughly. f
f Install a type-tested safety assembly. Bear in mind that, de- f
pending on the static pressure, you may also need a pressure
reducing valve.
f Connect the DHW outlet line and the cold water inlet line. f
Connect the hydraulic connections with flat gaskets.
f Size the drain so that water can drain off unimpeded when f
the safety valve is fully opened. The blow-off aperture of the
safety valve must remain open to the atmosphere.
f Fit the blow-off line of the safety assembly with a constant f
slope.
f Observe the information in the installation instructions of the f
safety assembly.
20 | SBB 751-1001 | SBB 751-1001 SOL
290889-40263-9263_SBB_751-1001_de_en_fr_nl_it_cs_fi_da.indb 20
9.7

Heating or solar installation

9.7.1 Water quality, solar circuit
A glycol/water mixture of up to 60 % is permitted for the indirect
coil in the solar circuit if only dezincification-resistant metals,
glycol-resistant gaskets and diaphragm expansion vessels suitable
for glycol are used throughout the installation.
9.7.2 Oxygen diffusion
Material losses
!
Avoid open heating systems and plastic pipes in under-
floor heating systems which are permeable to oxygen.
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 heating elements or steel pipes).
Material losses
!
The products of corrosion (e.g. rusty sludge) can settle in
the heating system components and can result in a lower
output or fault shutdowns due to reduced cross-sections.
Material losses
!
Avoid open vented solar thermal systems and plastic
pipes which are permeable to oxygen.
With plastic pipes that are permeable to oxygen, oxygen diffusion
may lead to corrosion on the steel components of the solar thermal
system (e.g. on the indirect coil of the DHW cylinder).
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26.09.2017 13:45:12