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Moderator boilers are manufactured according to the PN 303-5 standard,
which permits boiler operation in closed systems if specific requirements are
complied with. In case of versions suitable for automated operation (only and
exclusively versions with burners), protective systems are sufficient.
Fig. 8. Protection of the installation, for boilers operated in closed central
heating systems.
KOMIN
– CHIMNEY
ZAWÓR BEZPIECZEŃSTWA - SAFETY VALVE
CZUJNIK ZAWORU TERMICZNEGO
– THERMAL PROTECTION VALVE SENSOR
CZUJNIK TEMPERATURY - TEMPERATURE SENSOR
KOCIOŁ - BOILER
STEROWNIK
– CONTROLLER
WENTYLATOR
– BLOWER
ZAWÓR SPUSTOWY
– DRAINAGE VALVE
ZABEZPIECZENIE TERMICZNE
– THERMAL PROTECTION
ZAWÓR MIESZAJĄCY– MIXING VALVE
ZBIORNIK AKUMULACYJNY
– HEAT ACCUMULATION TANK
WĘŻOWNICA - COIL
INSTALACJA GRZEWCZA
– HEATING INSTALLATION
ZASILANIE Z SIECI - WATER PIPE SUPPLY
ODPROWADZENIE WODY
– WATER DRAINAGE
Special attention shall be paid in case of closed-system operation of
boiler versions designed for manual charging.
The manufacturer-recommended SYR 5067 thermal protection device will
only and exclusively be effective, if pressure in water pipe network can be
guaranteed at the min. level of 2.3 bar and if safety valve is installed. This
means that the system may not activate, if water from in-house water intake is
used (e.g. if power supply outage prevents the pressure booster set to switch on),
or wherever water supply outages frequently occur.
In such cases, the boiler shall not be installed in a closed system and its
automatic version should be used instead (which can not burn solid fuels with
manual charging).
