Kostrzewa Compact Bio 16, User Manual

Page: 76 / 304

Compact Bio / Compact Bio Luxury
User Manual – EN 07.15
Experts in biomass heating
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5. Design guidelines
5.B. Boiler room requirements
а) 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 floor 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
2
• 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 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 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 permissi-
ble temperatures must be installed directly on the boiler
• the boiler is compatible with water as a medium conforming to 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.
for that purpose 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 ensure that the
difference in temperature between the supply and the
return does not exceed 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:
• install the boiler pump at the system return (especially
in systems with high water capacity, where the
discharge pressure is very high)
• protect the boiler pump at the suction against
low pressure.