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Operation and maintenance manual for the Q-PER series boilers with feeders. The producer reserves the right to introduce technical modifications.
3.4.2. Closed water heating installations
The Q-PER boiler with automatic feeding may be used in closed
water heating installations, provided that:
• the system is equipped with a membrane expansion vessel,
• a heat excess extraction device (REGULUS DBV – 1 dual
function cooling valve) is installed,
• max. 2.5 bar safety valve is installed.
NOTE! These devices must be inspected at least twice a year.
The
fi
rst inspection must be conducted during the seasonal
boiler start-up with the water heating installation.
3.4.3. 4-way valve
The design of the heating system must include boiler protection
against return of excessively cold water from the installation. Use
of 4-way mixing valve is recommended. It allows increasing the
temperature of water returning to the boiler. The 4-way valve
mixes warm water from the feeding circuit with colder water
from the heating circuit return, and therefore:
• protects the boiler against low-temperature corrosion and
preliminary wear,
• increases the e
ffi
ciency of heating of domestic water in the
DHW tank,
• allows
fl
exible control of heating water temperature in rela-
tion with the heating system requirements,
• increases the e
ffi
ciency of the entire system.
Design and installation of a heating system appropriate for a
given building must be performed by properly quali
fi
ed persons.
Central heating systems may be di
ff
erent, thus the guidelines
included in the central heating design must be followed. A sam-
ple scheme of boiler connection with the central heating and
domestic hot water systems in an open heating system with
gravitational or forced water circuit is presented on page 13.
3.5. Connection of the boiler to electrical system
Boiler room should be equipped with electrical system with
rated voltage 230/50 Hz 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.
3.6. Filling the system with water
3.6.1. Filling the boiler with water
before
fi
rst start-up
1. Flush heating system and boiler before
fi
lling it with water to
remove all contaminations.
2. Fill the system with water through the drain cock using the
fl
exible hose. Water intended for feeding the heating boil-
er should meet the requirements of the PN-93/C-04607
standard. Quality of water
fi
lling the central heating system
in
fl
uences its durability therefore this water should be free
from the contaminations, oil and aggressive chemical sub-
stances. Water hardness should not exceed 2-4 (mval/l). Too
hard water causes deposition of sediment in the boiler and
heating system what decreases e
ffi
ciency and may damage
the boiler.
3. Stop feeding of water when the system is full that is water
will start
fl
owing out from the signalling pipe of the ex-
pansion vessel located in the highest point of the system
or when the pressure gauge indicates 5 bar. Re
fi
lling should
take several seconds to make sure that the water
fl
ows down
from the vessel.
4. Close boiler drain cock and disconnect
fl
exible hose from the
equipment when the system is
fi
lled.
