Technical data

OIL FIRED UNIT HEATER
9
2.0 Installation
Note
It is a requirement that only qualified and
competent personnel may undertake
installation commissioning and servicing of
OUHA ( C )Range Heaters.
Warning
All of the basic criteria
must be satisfied prior
to commencing installation and
commissioning, additionally, the Unit Heater
must be positioned and installed so as to
comply with all the relevant standards and
guide lines as well as meeting national and
local fire regulations and insurance criteria,
especially if it is proposed that the heater is to
be installed within a special risk area (e.g.
proximity to where petrol engined vehicles
are stored or parked, where cellulose
spraying takes place, where woodworking
machinery is operated, etc,).
Indirect fired heaters must not be located in
hazardous areas, however, it is permissible
for the heater to supply air to such areas.
The heater must not be installed within an
environment where there is a high
concentration of chlorides, fluorides, salts, or
other aggressive or volatile
chemicals/compounds.
Nor should the heater be positioned where
the burner could be adversely affected by
high winds or draughts.
The heater must be installed so that it is level.
Supports for the heater must be sufficiently
robust to withstand the weight of the heater
and any ancillary equipment. Any
combustible material adjacent to the heater or
flue system must be so placed or shielded so
that its surface temperature does not exceed
65C
The location chosen for the heater must allow
for the fitting of an effective flue system.
The location must also allow for adequate
clearance for the air supply, return air
circulation, oil supply, electrical supply,
whilst also providing good and safe working
access.
Suspended free blowing Unit Heaters are at
their most effective when located as close to
the working area as possible. However care
should be exercised to avoid directing the
discharged air directly onto the occupants of
the area to be heated.
Where the passage of cold air causes
problems (e.g by entrances, loading bays etc)
it is considered favourable if the heater is
positioned so as to discharge towards or
across the cold air source from a distance
from 1.5m - 6m dependent upon the size of
the entrance and the air throw characteristics
of the heater. On exposed walls heaters
should be positioned so as to discharge
towards, or along the length of the exposed
wall. In areas where it is proposed that more
than one heater is to be installed, a general
scheme of circulation should be drawn up
and maintained, thereby offering the best heat
distribution.
Air pressure within the area heated and the
outside air pressure must remain the same,
factors influencing this would be the presence
of extraction systems, ventilation systems,
and various types of process plant.
OUH 240/340 models can be installed to
allow the fans to work in opposite directions .
This enables the heater to be installed
centrally in the area to be heated and allows
warm air to be discharged to both the front
and rear of the heater