Instruction manual

3
1. Installation Requirements.
Isolate any electrical supply to the heat-
er and controller before proceeding.
For your own safety we recommend the use of
safety boots and leather faced gloves when
handling sharp or heavy items. The use of
protective eye wear is also recommended.
1.2 Burner Model Definitions
NRVxxLR-EV = Nor-Ray-Vac continuous
radiant tube heater only for use with branch end
configurations.
NRVxxLR-IL = Nor-Ray-Vac continuous
radiant tube heater only for use with in-line
configurations.
xx denotes kW rating. Models available; 12, 18,
24, 32, 38 and 46
1.1 Health and Safety
AmbiRad heaters must be installed in
accordance with the relevant provisions of the
Gas Safety (Installations and Use) Regulations
1998.
Due account should also be taken of any
obligations arising from the Health and Safety
at Works Act 1974 or relevant codes of
practice. In addition the installation must be
carried out in accordance with the current IEE
wiring regulations (BS 7671), BS 6896:
(Industrial & Commercial) and any other
relevant British Standards and Codes of
Practice by a qualified installer. Isolate all
electrical supplies to the heater & controller
before proceeding.
Introduction.
number of radiant branches manifolded
together, linked by a tail pipe to a vacuum fan
discharging the spent products of combustion to
atmosphere. A system may comprise of just one
burner and one vacuum fan, to multiple burners
in multiple radiant branches with one or more
vacuum fans.
To enable exact matching of operational needs
within an area, distances between burners and
ratings of the burners can vary. The unique
feature of Nor-Ray-Vac ‘LR’ series is a radiant
system which provides uniform heat coverage of
the floor area, eliminating hot/cold spots.
The tube into which the burners are mounted
and over which the reflectors are fitted and
emits the maximum heat is called the radiant
tube. The radiant heat emitted from the hot tube
is directed downwards by reflectors. The
remaining interconnecting tube is called the tail
pipe and radiates with less intensity.
The operating temperatures of the tubes
generally range from 200°C – 480°C max.
The action of the vacuum fan is three fold; to
create a high negative pressure within the
radiant tube and tail pipe so as to discharge the
spent products of combustion from the system
to a point outside the building being heated; to
control the flow of gas and air through each
burner in stoichiometric proportions; to draw
carrier air into the tube system at the start of
each radiant branch, in order to distribute the
heat from the flame along the tube.
Welcome to the range of Nor-Ray-Vac ‘LR’
series continuous radiant tube heaters. The
Nor-Ray-Vac ‘LR’ series system complies with
the requirements of the European Gas
Appliance Directive BS EN777-4. Local
regulations may vary in the country of use and it
is the installers responsibility to ensure that such
regulations are satisfied.
All installation, assembly, commissioning and
service procedures must be carried out by
suitable qualified competent persons to the
statutory regulations in the country of use.
When assembling, installing, commissioning and
servicing is undertaken on radiant tube heaters
specified in these instructions, due care and
attention is required to ensure that working at
height regulations are adhered to at the
mounting heights specified.
PLEASE READ this document prior to
installation to familiarise yourself with the
components and tools you require at the various
stages of assembly.
All Dimensions shown are in mm unless
otherwise stated.
The manufacturer reserves the right to alter
specifications without prior notice.
The Ambi-Rad Nor-Ray-Vac ‘LR’ series direct
gas fired radiant heating system comprises of a
continuous system with a number of burners
located in series in a radiant branch, and a
The system is assembled at high level
suspended by chains from first fixings to
the roof structure.
(First fixings by others)