Pereko AGRO Multi 12, Operation And Maintenance Manual

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Page Operation and maintenance manual for the AGRO Multi series boilers with feeders. The producer reserves the right to introduce technical modifications.
3.3.2. Closed water installations
PEREKO heating boilers fi red with solid fuels and with automatic
fuel charging with nominal power up to 52 kW can be used in
closed water heating systems provided that: 1. the system has
been equipped with membrane expansion vessel; 2. device in-
tended for removal of heat excess, that is two-function cooling
valve REGULUS DBV-1, was installed and 3. 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
connection diagram of the boiler to the central heating and do-
mestic hot water system in the open system 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.