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INSTALLATION
Installation
9.
Installation
9.1
Removing / fitting the cylinder casing
Note
Open or remove the cylinder casing before fitting the DHW
circulation and indirect coil lines.
The plinth trim should be fitted after the tightness check.
9.2
Indirect coil connection
f Flush the indirect coil with water before connection.
f
9.2.1 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
Water connection and safety assembly
9.3.1 Safety instructions
Note
Carry out all water connection and installation work in
accordance with regulations.
Cold water line
Steel or copper pipes, or plastic pipework, are approved materials.
Material losses
!
A safety valve is required.
16
| SBB WP Trend
DHW line
Copper or plastic are approved materials for pipework.
Material losses
!
If a threaded immersion heater is fitted and plastic pipe-
work systems are used at the same time, observe the
maximum permissible temperature and the maximum
permissible pressure in chapter "Specification / Data
table".
Material losses
!
Operate the appliance only with pressure-tested taps.
9.3.2 Connection
f Flush the pipework thoroughly.
f
f Observe the information in the installation instructions of the
f
safety assembly.
f Connect the DHW outlet and the cold water inlet lines with
f
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
f
the safety valve is fully opened. The safety valve discharge
aperture must remain open to the atmosphere.
f Install the discharge pipe of the safety assembly with a con-
f
stant slope.
9.4
Temperature sensors
f Bend the springs of the DHW sensor.
f
f Insert the DHW sensor as far as it will go into the well for the
f
heat pump flow sensor (recommended energy saving posi-
tion) or heat pump return sensor (high DHW convenience).
f Fit the sensors for the control units used according to the rel-
f
evant installation instructions (for sensor wells, see chapter
"Specification / Dimensions and connections").
f Route the connecting cable/lead to the heat pump control
f
unit.
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