Hoval RoofVent CON-9, Design Handbook

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1 Use
1.1 Intended use
RoofVent
®
LK units are used to supply fresh air, for the
disposal of extract air as well as for heating and cooling of
high spaces coupled with an optimised fresh air rate. Also
included under intended use are compliance with the instal-
lation, commissioning, operating and maintenance provisions
(operating manual).
Any use beyond this is considered improper use. The
manufacturer shall not be held responsible for any damage
resulting from such use.
1.2 User group
RoofVent
®
LK units may only be installed, operated and
maintained by authorized and trained specialists who are
familiar with the equipment and aware of the dangers
involved.
The operating manual is for English-speaking operating
engineers and technicians as well as specialists in building,
heating and ventilation technology.
1.3 Risks
RoofVent
®
LK units are built to correspond to the state of
the art and to current safety standards. However, despite all
precautionary measures taken, there are still some potential
hazards which are not immediately obvious, such as:
■ Dangers when working with the electrical systems
■ When working on the ventilation unit, parts (e.g. tools) can
fall or be dropped.
■ Dangers when working on the roof
■ Damage to devices or components due to lightning
■ Malfunctions as a result of defective parts
■ Hazards from hot water when working on the hot water
supply
■ Ingress of water through the roof unit if the access panels
are not closed correctly
2 Construction and operation
The RoofVent
®
LK provides fresh air supply and extract air
removal as well as heating and cooling for large spaces
(production halls, shopping centres, sports halls, exhibition
halls etc.). It fulfils the following functions:
■ Heating (with connection to the central boiler system)
■ Cooling (with connection to chilled water system)
■ Fresh air supply
■ Extract air removal
■ Recirculation
■ Mixed air operation
■ Air distribution via Air-Injector
■ Air filtration
A ventilation system consists of several autonomous
RoofVent
®
LK units and, as a rule, works without supply and
extract air ducts. The units are decentrally installed in the
roof and are also serviced from roof level.
Thanks to their high output and efficient air distribution,
RoofVent
®
LK units have a large operating range. This
means that compared with other systems, only few units are
necessary to create the required conditions.
The units make use of the extract air energy in mixed air
operation. The DigiNet control system constantly optimises
the fresh air rate: Only as much fresh air is taken in as is
necessary to maintain the room temperature without addi-
tional heating or cooling. A minimum value can be set.
2.1 Unit construction
The RoofVent
®
LK consists of the following components:
■ Roof unit:
self-supporting casing made of Aluzinc sheet steel, insu-
lated inside (class B1)
■ Filter box: available in three standard lengths per unit size
for adjustment to specific dimensional requirements
■ Heating/cooling section:
coil connections possible on each side (usually under-
neath the extract air grille)
■ Air-Injector:
patented, automatically adjustable vortex air distributor for
draught-free air distribution over a large area
The unit is delivered in two sections: above-roof unit and
below-roof unit (see Fig. J1). The components are bolted
together and can be dismantled individually.
RoofVent
®
LK
Use