Dhw Heating; Safety Equipment To Din-En 12828; Requirements; Low Water Indicator - Buderus Logano GE315 Technical Manual

7.1.3

DHW heating

If DHW temperature control with a Logamatic control unit
is designed accordingly, special functions can be used,
such as the actuation of a DHW circulation pump or
thermal disinfection to prevent the growth of legionella.
Despite the significant cooling down of the heating water,
primary store systems can be combined with the
Ecostream cast iron boilers Logano GE315, GE515 and
GE615, as thermostream technology is suitable for cold
return water.
In multi boiler systems in combination with condensing
boilers, connect the primary store system to the low
temperature return ( Fig. 40, page 54).
For more detailed information on this subject, see the
technical guide to sizing and selecting DHW cylinders.
6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615
7.2

Safety equipment to DIN-EN 12828

7.2.1

Requirements

No claim is made as to the completeness of the diagrams
or the corresponding design information for system
examples. Each system example is a non-binding
recommendation for certain versions of the heating
system. The practical implementation is subject to
currently applicable technical rules. Safety equipment
should be installed in accordance with local regulations.
DIN EN 12828 determines the safety equipment level.
The schematic illustrations of safety equipment in heating
systems to DIN-EN 12828 for systems with a high limit
safety cut-out ≤ 110 °C, and DIN-EN 12953-6 for
systems with a high limit safety cut-out ≤ 120 °C, can be
referred to for assistance with planning.
7.2.2

Low water indicator

According to DIN-EN 12828, a minimum pressure limiter
can be installed instead of the low water indicator; with
boiler output levels up to 300 kW, a minimum pressure
switch is a possible alternative.
For the Ecostream cast iron boilers Logano GE315,
GE515 and GE615, Buderus offers complete boiler
safety equipment assemblies, which contain an affordable
minimum pressure switch with an adaptor for boiler
output levels up to 300 kW (
Systems 7
page 60).
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