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1 filter, 1 cold water meter and 2 ball valves.
There must be a ventilation system suitable for the total boiler capacity in the
boiler room in order to be able to expel toxic, explosive gases that may occur in
the boiler room and ensure an efficient and low emission combustion. It must be
ensured that this ventilation system is functional as long as the boiler is active.
Ventilation calculations must be calculated according to the local directives.
Minimum Safety Equipment Required in Systems with Open
Expansion Tank
Open expansion tanks;
Boilers used with expansion systems open to the atmosphere must be
connected to an expansion tank which is located at the highest point of the whole
heating system and open to the atmosphere with a suitable capacity.
They must be dimensioned to meet the water expansion at the highest possible
temperature in the system, and the expansion tank must comply with these
requirements when dimensioning pipe connections. When installing the
expansion tank and connecting pipes, frost protection should be considered.
Expansion tanks open to the atmosphere must be connected to the connection
located under the boiler flow and return water flange. Manual shut-off equipment
must not be used in the connection line between the expansion tank and the
boiler. There should be a ventilation outlet and overflow pipe which can not be
closed in the expansion tanks open to the atmosphere. The overflow pipe should
be dimensioned to drain the maximum flow rate of the water entering the system,
a practical selection method; The overflow pipe diameter can be provided by
selecting it as 1 DN larger than the filling pipe diameter.
Expansion tanks, safety pipes and overflow pipes must be protected against
freezing. The sample reference assembly diagram is presented in the
appendices.
Open expansion tank pipelines;
The boilers must be connected to the expansion tanks open to the atmosphere
without any valve between the pipes with sufficient diameter from both the safety
flow (expansion) and safety return (supply) lines. The expansion tank must be
open to the atmosphere. The safety flow pipe must be connected from the upper
part of the expansion tank, the safety return pipe from the lower part of the
expansion tank, and the overflow pipe at the calculated maximum expansion
level. It should not be possible to close the safety pipe or the supply and
expansion pipe.