Kostrzewa Mini Bio Manual De Uso página 65

5. Design guidelines
Fig. Boiler location in the boiler room - dimension diagram
5.B Boiler room requirements
a) Boiler foundation min.0.05 m
Boiler foundation requirements:
the foundation must protrude over the boiler room floor
the foundation edges must be secured with steel angle sections
b) Boiler room floor
Boiler room floor requirements:
the boiler room must be made of non-flammable materials,
resistant to extreme temperature changes and impact
the floor must descend in the well direction
c) Boiler room ventilation
Boiler room ventilation requirements:
do not use mechanical ventilation system in the room with solid
fuel furnace if the combustion air is supplied directly from the
room and the flue gas is discharged gravitationally via a duct
from the device
the boiler room must be fitted with a ventilation duct with a cross
section of at least 50% of the flue cross sectional area, min.
20x20 cm
the boiler room must be fitted with a ventilation duct with a cross
section of at least 25% of the flue cross sectional area with the
outlet under the boiler room ceiling
the outlet duct cross section must be min. 14x14 cm
the vents must be made of non-flammable materials
5.C Hydraulic system requirements
the hydraulic system must be made in accordance with the good
building practices, relevant standards and regulations, and the
design input
the boiler may operate in a sealed heating system (sealed
diaphragm tank) provided that the boiler supply and return line is
fitted with a dual action relief valve
a pressure reducer must be installed with a relief valve to avoid
safety valve opening in case of a rapid increase in boiler water
Experts in heating
pressure
an expansion tank must be installed in the highest point of the
heating system and protected against frost
the expansion tank should be installed at the boiler return
to guarantee proper working conditions and failure free boiler
operation, ensure a minimum temperature at the boiler return
by installing the boiler pump with a mixing valve (boiler mixing
system)*
a temperature sensor of the system protecting against exceeding
permissible temperatures must be installed directly on the boiler
the boiler is compatible with water as a medium conforming to
the water quality requirements.
* Water temperature at the boiler return must be min.
45°C to prevent boiler corrosion as a result of undesirable
and excessive flue gas condensation in the boiler.
The boiler circulation pump must be fitted with a control
valve. The pump output must be approx. 40÷50%
of the nominal water flow through the boiler. The boiler
circuit design must guarantee the difference
in temperature between the supply and the return
of max. 15°C.
CAUTION!
The boiler pump must be installed between two
cut-off valves. To protect the pump against high
pressure difference between the suction and discharge:
in systems with high water capacity, where the discharge
pressure is very high)
low pressure
Mini Bio and Mini Bio Luxury User Manual - ENGV 08.15
65