Pereko KSR Beta Pelet 16, Operation And Maintenance Manual

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Page Operation and maintenance manual for the KSR Beta Pelet series boilers with feeders. The producer reserves the right to introduce technical modifications.
3.3.2. Closed installations water
distribution systems
KSR BETA PELET heating boilers with automatic fuel charging
with nominal power up to 300 kW can be used in closed water
heating systems provided that:
1. the system has been equipped with membrane expansion
vessel;
2. a device intended for removal of heat excess, that is
two-function cooling valve REGULUS DBV-1, was installed
3. the safety valve 1.5 bar was installed.
NOTE! Correct selection of protections and suitable expan-
sion diaphragm vessel having in
fl uence on safety level of
the system and the boiler. The above equipment should
be rigorously inspected minimum twice per year. The
fi rst
inspection should be carried out during seasonal start-up
of the boiler with the water distribution system.
3.3.3. Four-way valve
Design of the heating system should take into account protec-
tion of the boiler against the return of too cold water from the
system. It is recommended to use four-way mixing valve what
allows the increasing temperature of water returning to the
boiler.
Four-way valve mixes hot water from the supply with cooler
water returning from the heating cycle and therefore:
• protects the boiler against low-temperature corrosion and
premature wear,
• improves the e ffi ciency of heating of tap water in the DHW
storage tank,
• allows smooth adjustment of the temperature of the heating
water with respect to the needs of the heating system,
• improves the e ffi ciency of operation of the whole system.
Designing of the correct diagram of the system for the house
and its execution should be entrusted to a person with appro-
priate quali
fi cations. Central heating systems may di ff er and
therefore it is necessary to stick to the guidelines included in the
central heating design. Below you will
fi nd an exemplary con-
nection diagram of the boiler to the central heating and domes-
tic hot water system in the open installation with gravitational
or forced water circulation.
3.4. Connection of the boiler to electrical system
Boiler room should be equipped with electrical system with
rated voltage 230/50Hz in compliance with the applicable reg-
ulations. The system should be terminated with plug-in socket
equipped with protective conductor contact with connected
protective conductor terminal PE to protect against electric
shock.