Preparing For Installation; Removing / Fitting The Cylinder Casing; Checking The Signal Anode; Heating Installation - STIEBEL ELTRON SBB 302 WP Manual For Operation And Installation

iNSTALLATiON

Preparing for installation

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1 Side thermal insulation section
f Ensure that the closures are in the joint between a side f
thermal insulation section and the thermal insulation of the
cylinder.
9. Preparing for installation
9.1

Removing / fitting the cylinder casing

Note
Open or remove the cylinder casing before fitting the
high limit safety cut-out and DHW circulation/indirect
coil lines.
Fit the cylinder casing before fitting a flanged immersion
heater.
The plinth trim should be fitted after the tightness check.
9.2

Checking the signal anode

Material losses
!
The appliance must not be operated without a consump-
tion indicator or with a damaged one, otherwise water
will leak out once the anode is depleted.
9.3

Heating installation

The connected heat source must not exceed a maximum flow
temperature of 60 °C or must, alternatively, be equipped with a
high limit safety cut-out. You may also install a motorised valve
that interrupts the cylinder heating by the heat source.
f Flush the indirect coils with water before connecting the f
heating water pipes.
9.3.1 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.
6 | SBB 302 WP (AU) | SBB 401-501 WP SOL (AU)
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9.3.2 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.
9.3.3 Solar installation
The circuit must include an air-vent, a check valve and an expan-
sion vessel. The check valve is not required if you are utilising a
Solar compact installation.
f Flush the solar indirect coil with water before connecting the f
solar circuit.
9.3.4 SBB 401 WP SOL (AU) | SBB 501 WP SOL (AU)
without solar installation
f Connect both indirect coils to the "heat pump heating return" f
and "solar flow" connections (see chapter "Specification /
Dimensions and connections").
9.4 Fitting the water connection and the safety
assembly
Note
Carry out all water connection and installation work in
accordance with regulations.
f Flush the line thoroughly. f
The max. permissible pressure must not be exceeded (see chapter
"Specification / Data table").
f Install a type-tested safety valve in the cold water supply f
line. Please note that, depending on the static pressure, you
may also need a pressure reducing valve.
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1 Cold water connection
2 Cold water inlet pipe
f Connect the cold water supply directly to the cylinder or with f
the connecting pipe routed between the cylinder feet.
f During fitting, counterhold the fitting with an open-ended f
spanner (size 36).
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