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Mini Bio and Mini Bio Luxury User Manual - ENGV 08.15
Experts in heating
5. Design guide l ines
Fig. Boiler location in the boiler room - dimension diagram
5.B Boiler room requirements
a) Boiler foundation min.0.05 m
Boiler foundation requirements:
³ the foundation must protrude over the boiler room floor
³ the foundation edges must be secured with steel angle sections
b) Boiler room floor
Boiler room floor requirements:
³ the boiler room must be made of non-flammable materials,
resistant to extreme temperature changes and impact
³ the floor must descend in the well direction
c) Boiler room ventilation
Boiler room ventilation requirements:
³ 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
³ 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
³ 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
³ the outlet duct cross section must be min. 14x14 cm
³ the vents must be made of non-flammable materials
5.C Hydraulic system requirements
³ the hydraulic system must be made in accordance with the good
building practices, relevant standards and regulations, and the
design input
³ 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
³ a pressure reducer must be installed with a relief valve to avoid
safety valve opening in case of a rapid increase in boiler water
pressure
³ an expansion tank must be installed in the highest point of the
heating system and protected against frost
³ the expansion tank should be installed at the boiler return
³ 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)*
³ a temperature sensor of the system protecting against exceeding
permissible temperatures must be installed directly on the boiler
³ 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:
´TY^_LWW_SPMZTWP][`X[L__SP^d^_PX]P_`]YP^[PNTLWWd
in systems with high water capacity, where the discharge
pressure is very high)
´[]Z_PN__SPMZTWP][`X[L__SP^`N_TZYLRLTY^_
low pressure