BENSON OUHA 100, Installation And User Instructions Manual

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BENSON OIL UNIT HEATER
7
The following clearances in mms must be
observed
*
when suspended
2.2 Heater Mounting
The heater and flue must be adequately
supported by one of the following methods ;
a) Suspension by steel drop rods or straps
from the
M10 fixing points located on top of
the heater
These must be of sufficient strength to
safely carry the weight of the unit and
ancillary equipment. The straps may only
drop vertically to eyebolts, if used;
I.E . They
must not be joined to the eyebolt at an angle
to the vertical, and eyebolts if used should be
of an approved type.
b) OUH heaters can be mounted on
specifically designed cantilever wall or
vertical stanchion brackets which locate
directly to the four
M10 fixings on the heater
casing.
Alternatively OUHA or OUHC units can be
mounted on cantilever type wall brackets
however consideration must be given to
ensure that the bracket is large enough to
support the heater whilst providing the
necessary clearances
In either case the installer should ensure that
the wall wall fixings or other support medium
is capable of supporting the weight
c ) On a level non-combustible surface
capable of adequately supporting the weight
of the unit and ancillary equipment .
2.3 Warm Air Circulation
The air heater should be positioned to enable
maximum circulation of discharged warm air
within the area to be heated, whilst taking
account of personnel within the area,
sources of cold air ingress , and obstructions.
Ensure louvres are adjusted outwards
and ensure blades are not resonating
The air temperature rise on passing the heat
exchanger is typically around 34
0
C
A full and unobstructed return air path to the
air heater must be provided
(see 2.4 Air Supply).
Where the heater is positioned to deliver
blown air through an opening in a wall, return
air intakes should be located so that they
cannot become blocked. Similarly these
intakes must be positioned so as not to draw
in odours, fumes, hazardous vapours or
particles.
2.4 Air Supply
Provision must be made for the existence of
an air supply in order to satisfy both
combustion and ventilation criteria.
It is a requirement that the area where the air
heater is located must have a permanent air
vent of negligible resistance direct to the
outside air.
Such air vents must be positioned so as not
to become blocked or flooded, nor should
they be placed so as to introduce
undesirable matter (e.g. flammable, volatile,
or aggressive chemicals/compounds or
potentially hazardous or harmful substances)
either direct from the outside, or through their
proximity to an adjacent extraction system.
Note
It is strongly recommended that BS 6230 :
2005 is referred to for further information
concerning ventilation requirements
Where mechanical ventilation is used it is a
requirement that the inlet is of the
mechanical type, and the outlet is either
mechanical or natural.
Model 100 140 200 250 300 350
Above 300 300 300 300 300 300
Below *
300 300 300 300 300 300
R Hand 680 680 680 680 810 810
L Hand 250 250 250 250 250 250
Rear Axial
400 500 560 560 560 560
Rear Cent 200 200 200 200 200 200