Hoval RoofVent CON-9, Design Handbook

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1 Use
1.1 Intended use
RoofVent
®
twin cool units are used to supply fresh air,
for the disposal of extract air and for heating and cooling
with energy recovery in high spaces. Also included under
intended use are compliance with the installation, commis-
sioning, operating and maintenance provisions (operating
instructions).
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
®
twin cool units may only be installed, operated
and serviced by authorised and trained specialist personnel
who are familiar with the equipment and aware of the
dangers involved.
The operating instructions are for English-speaking operating
engineers and technicians as well as specialists in building,
heating and air technology.
1.3 Risks
RoofVent
®
twin cool units are built to correspond to the
state of the art and to the latest 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
■ During work on the ventilation unit, parts (e.g. tools) may
fall or be dropped.
■ Dangers from 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
■ Water penetration through the roof unit if the access
panels are not closed correctly
2 Construction and operation
The RoofVent
®
twin cool 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 water chiller)
■ Fresh air supply
■ Extract air removal
■ Recirculation
■ Energy recovery with twin plate heat exchanger
■ Air distribution via Air-Injector
■ Air filtration
A ventilation system consists of several autonomous
RoofVent
®
twin cool units and as a rule, works without supply
and extract air ducts. The units are installed in the roof and
are also serviced from roof level.
Thanks to their high output and efficient air distribution,
RoofVent
®
twin cool units have a large operating range. This
means that compared with other systems, only few units are
necessary to create the required conditions.
2.1 Unit construction
The RoofVent
®
twin cool comprises the following compo-
nents:
■ Roof unit with energy recovery: self-supporting casing
made of Aluzinc sheet steel, insulated inside (class B1)
■ Combi box:
contains the second plate heat exchanger and the extract
air filter
■ 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 3 sections: roof unit, combi box and
heating/cooling section with Air-Injector (see Fig. E1). The
components are bolted together and can be dismantled
individually.
RoofVent
®
twin cool
Use