12
|
Product description
6 720 648 162 (2011/08)
2.8.3
Combustion air supply conditions
2.8.4
Conditions, Fuel
Fans that extract air from the
boiler room.
−
During burner operation, no mechanical air handling equipment may be operated that could
extract combustion air from the boiler room, e.g.:
•
Exhaust hood
•
Tumble dryer
•
Ventilation equipment
Small animals
−
Prevent small animals from entering the boiler room, particularly through the air inlet vents
– by fitting them with screens.
Fire safety
−
Maintain clearances between the boiler and flammable materials in accordance with local
regulations. A minimum clearance of 16" is required. Never store flammable materials or
liquids in the vicinity of the boiler.
Flooding
−
In case of an acute risk of flooding, disconnect the boiler in time from its fuel and power
supply before water enters the room. Any components or control equipment, which came in
contact with flood water, must be replaced before re-commissioning.
Operating conditions
Notes – Requirement in greater detail
Table 6
Boiler room and ambient conditions
Operating conditions
Boiler output (in case of
multi-boiler systems = total output)
Ventilation air cross-section in square inches
(unrestricted aperture)
Air intake flow cross-section for
combustion air drawn from
outside (divided between max. 2
apertures)
< 170,000 Btu/hr
(< 50 kW)
At least 23.25 square inches (150 cm
2
)
> 170,000 Btu/hr
(> 50 kW)
At least 23.25 (150 cm
2
) square inches and also 0.91 square inches
(6 cm
2
) per 10,000 Btu/hr (3 kW),
that is above 170,000 Btu/hr (50 kW)
Table 7
Observe national regulations for boilers which draw their air supply from the boiler room.
Operating conditions
Notes – Requirement in greater detail
Permissible fuels for boilers
without integral burners
−
This boiler can be operated with following fuels. Select a burner that is suitable for one of
these fuel types:
•
Fuel oil in accordance with the burner specification. If a poorer quality oil (kinematic
viscosity > 0.0093 sq in/sec (> 45.5 s Sayboldt) at 68 °F) is used, the maintenance and
cleaning periods must be reduced. In that case, carry out maintenance and cleaning
procedures at least twice a year.
•
Natural gas in accordance with the burner specification
•
LPG in accordance with the burner specification
Contamination
−
Free of contaminants (for example dust, mist, humidity), i. e. a constant operation will not
lead to accumulation of deposits, in valves, strainers and filters and could lead to service
calls.
Table 8
Fuels