Installation; Heat Exchanger Connection; Water Connection And Safety Assembly - STIEBEL ELTRON STD 315-1 Plus Operation And Installation Manual

iNSTALLATiON

installation
9. Installation
9.1

Heat exchanger connection

f Flush the indirect coil with water before connection.
9.1.1 Oxygen diffusion
Material losses
!
Avoid open vented heating systems and underfloor
heating systems with plastic pipes that 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 radiators or steel pipes).
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.
9.2

Water connection and safety assembly

9.2.1 Safety instructions
Note
Carry out all water connection and installation work in
accordance with regulations.
Note
Connect the hydraulic connections using flat gaskets only.
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Cold water line
Steel, copper or plastic are approved materials for pipework.
Material losses
!
A safety valve is required.
DHW line
Copper or plastic are approved materials for pipework.
Material losses
!
For the combined use of a threaded immersion heater
and plastic pipework systems, observe the maximum
permissible temperature and the maximum permissible
pressure specified in chapter "Specification / Data table".
Material losses
!
Operate the appliance only with pressure-tested taps.
Note
If not used, close off the DHW circulation connection (see
chapter "Specification / Dimensions and connections")
with the supplied cap and gasket.
9.2.2 Connection
f Flush the pipework thoroughly.
f Observe the information in the installation instructions of the
safety assembly.
f Connect the DHW outlet and the cold water inlet lines with
the safety assembly. Please note that, depending on the stat-
ic pressure, you may also need a pressure reducing valve.
f Size the drain so that water can drain off unimpeded when
the safety valve is fully opened. The safety valve discharge
aperture must remain open to the atmosphere.
f Fit the discharge pipe of the safety assembly with a constant
fall.
STD 315-1 Plus, STD 420-1 Plus, STD 520-1 Plus | 7