8
Glossary
Components (to 2014/34/EU)
Any item essential to the safe functioning of equipment
and protective systems but with no autonomous func-
tion.
Equipment (to 2014/34/EU)
Machines, apparatus, fixed or mobile devices, control
components and instrumentation thereof and detection
or prevention systems which, separately or jointly, are
intended for the generation, transfer, storage, measure-
ment, control and conversion of energy and/or the pro-
cessing of material and which are capable of causing an
explosion through their own potential sources of ignition.
Exhaust air – EHA
Air that flows from an internal space to the outside.
Explosive atmosphere (to 2014/34/EU)
A mixture with air, under atmospheric conditions, of
flammable substances in the form of gases, vapours,
mists or dusts in which, after ignition has occurred, com-
bustion spreads to the entire unburned mixture. May
also be called 'zone with potentially explosive atmos-
pheres' in this manual.
Extract air – ETA
Air that flows out of a conditioned room.
HVAC technician
HVAC technicians are individuals who have sufficient
professional or technical training in the field they are
working in to enable them to carry out their assigned
duties at the level of responsibility allocated to them and
in compliance with the relevant guidelines, safety regu-
lations and instructions. HVAC technicians are individ-
uals who have in-depth knowledge and skills related to
HVAC systems; they are also responsible for the profes-
sional completion of the work under consideration.
Indoor air – IDA
Air in a conditioned internal space.
ODA – Outdoor air
Untreated air that flows through an inlet into the air han-
dling unit or a building.
Potentially explosive atmosphere (to 2014/34/EU)
An atmosphere which could become explosive due to
local and operational conditions. May also be called
'area with potentially explosive atmospheres' in this
manual.
Recirculated air – RCA
Extract air that is reconditioned in the air handling unit
and supplied to an internal space again.
Secondary air – SEC
Air that is conditioned and then supplied to the same
room from which it was extracted.
Skilled qualified electrician
Skilled qualified electricians are individuals who have
sufficient professional or technical training, knowledge
and actual experience to enable them to work on elec-
trical systems, understand any potential hazards related
to the work under consideration, and recognise and
avoid any risks involved.
Skilled qualified refrigeration technicians
Skilled qualified refrigeration technicians have been
trained in the field of refrigeration engineering, and they
know the relevant standards and guidelines. Evidence
of the relevant experience claimed must be available.
Skilled qualified refrigeration technicians are individuals
who have sufficient professional or technical training,
knowledge and actual experience to enable them to
work on refrigeration systems, understand any potential
hazards related to the work under consideration, and
recognise and avoid any risks involved.
Supply air – SUP
Air that is supplied to a conditioned internal space; it is
also conditioned air that enters an air handling unit.
Transfer air – TRA
Air that flows from one conditioned internal space to
another conditioned internal space.
Zone (1999/92/EC, Annex I)
Hazardous places are classified in terms of zones on
the basis of the frequency and duration of the occur-
rence of an explosive atmosphere. May also be called
'zone with potentially explosive atmospheres' in this
manual.
Glossary
Air handling unit X-CUBE Ex
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