Hoval RoofVent CON-9, Design Handbook

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1 Use
1.1 Intended use
RoofVent
®
twin pump 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
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
®
twin pump 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 manual is for English-speaking operating
engineers and technicians as well as specialists in building,
heating and ventilation technology.
1.3 Risks
RoofVent
®
twin pump 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 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
®
twin pump 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 integrated reversible heat pump)
■ Cooling (with integrated reversible heat pump)
■ 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 pump 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
®
twin pump 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 pump comprises the following compo-
nents:
■ Roof unit with energy recovery and control attachment:
self-supporting casing made of Aluzinc sheet steel, insu-
lated inside (class B1)
■ Combi box:
contains the second plate heat exchanger, the extract air
filter and the pipework of the working medium circuit
■ Heating/cooling section:
with evaporator coil (insulated inside)
■ Air-Injector:
patented, automatically adjustable vortex air distributor for
draught-free air distribution over a large area
■ Heat pump (Daikin ERQ250)
The unit is delivered in 4 sections:
■ Roof unit
■ Combi box
■ Heating/cooling section with Air-Injector
■ Heat pump
The components of the ventilation unit are bolted together
and can be dismantled individually. The heat pump is
installed on the roof, close to the unit.
RoofVent
®
twin pump
Use