BENSON OUHA 100, Инструкция по установке и эксплуатации

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BENSON OIL UNIT HEATER
8
2.4.1 Heaters installed within the
heated space
Where heaters are installed within the space
to be heated (e.g. not a plant room separate
room, or compartment then Combustion and
general ventilation
is not required if
The combustion air intake is ducted to
atmosphere (i.e. Room Sealed Appliance)
OR
The design air change rate of the building is
more than 0.5 air changes per hour and the
volume of the space is greater than 4.7m
3
per kilowatt of the total rated heat input
Combustion and general ventilation
is required if
The appliance is not provided with
combustion ductwork e.g. the air for
combustion is taken from the space being
heated
And
The building design air change rate is less
than 0.5 air changes per hour and the
volume of the space is greater than 4.7m
3
per kilowatt then low level ventilation is
required
Where combustion air ventilation is required
as dictated by the previous criteria then that
ventilation can be via permanent ventilation
openings / grilles situated at low level (I.e.
below the flue takeoff spigot ) and with the
free area of such grilles as :-
For heaters with a rated input of less than
60 kW — 4.5 cm
2
per kW of heat input
For heaters with a rated input of more than
60 kW — 270 cm
2
plus for each kW of rated
input over the 60 kW threshold an additional
4.5 cm
2
Or by mechanical input (
not extract )
ventilation in association with either
mechanical or natural extract and with a
ventilation flow rate of 1.08m
3
/h per kW of
total rated input
Where mechanical extract is used to
complement the above then the extract rate
shall be 2.16m
3
/h per kW of rated heat input
Mechanical ventilation systems where fitted
must be provided with safety interlocks to
prevent heater operation in the event of
airflow failure.
2.4.2
Heaters installed Within a Plant Room
Where the heater is installed within a plant
room ,separate room or compartment then
combustion and general ventilation
is always required
Where the combustion air intake is ducted to
atmosphere (i.e. Room Sealed Appliances)
Then that ventilation can be via a permanent
ventilation / grille situated at both low level
(inlet) and high level (outlet) and with the free
area of such grilles as :-
Low level (Inlet)
For heaters with a rated input of less than
60 kW — 4.5 cm
2
per kW of heat input
For heaters with a rated input of more than
60 kW — 270 cm
2
plus for each kW of rated
input over the 60 kW threshold an additional
2.25 cm
2
High Level (Outlet)
For heaters with a rated input of less than
60 kW — 4.5 cm
2
per kW of heat input
For heaters with a rated input of more than
60 kW — 270 cm
2
plus for each kW of rated
input over the 60 kW threshold an additional
2.25 cm
2
Alternatively mechanical input (not extract)
ventilation may be used in association with
either mechanical or natural extract and with
a ventilation flow rate of 2.16m
3
/h per kW of
total rated input.
Mechanical ventilation systems where fitted
must be provided with safety interlocks to
prevent heater operation in case of air flow
failure
Where the combustion air intake
is not
ducted to atmosphere heater installed in
flue only configuration then ventilation can
be via a permanent ventilation opening /
grille situated at both Low level (Inlet) and
high Level (Outlet) and with the free area of
such grilles as :-
Low level (Inlet)
For heaters with a rated input of less than
60 kW — 9.0 cm
2
per kW of heat input