Hoval RoofVent CON-9, Design Handbook

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8 Specification texts
Air supply and extraction unit RoofVent
®
twin heat, consisting
of:
■ Roof unit with energy recovery
■ Combi box
■ Air-Injector
■ Control systems
All components are wired as ready-to-connect.
8.1 Roof unit with energy recovery LW.T
Self-supporting, weatherproof casing made from Aluzinc
sheet steel, insulated on the inside (fire protection class B1),
with weather louvre door for easy access to the fresh air
filter and unit control box, access panel with quick-release
fasteners for easy access to the extract air filter, isolation
switch outside for interruption of the high-voltage supply.
The roof unit includes:
■ Fresh air filter (bag filter class G4) with differential pres-
sure switch for filter monitoring
■ Opposed fresh air and recirculation dampers with actuator
with spring return
■ Plate heat exchanger made of aluminium with bypass,
differential pressure switch, condensate collecting channel
and siphon to the roof, including ER and bypass dampers
with actuators with spring return to regulate the energy
recovery
■ Maintenance-free, direct-drive supply air fan
■ Maintenance-free, direct-drive exhaust air fan with
frequency converter
■ DigiUnit terminal box with DigiUnit controller as part of the
Hoval DigiNet control system
DigiUnit controller DU5
Control module, fully wired to the components of the venti-
lation unit (fans, actuators, temperature sensors, frost
controller, filter monitoring):
■ Controls the unit including the air distribution according to
the specifications of the control zone
■ Controls the supply air temperature using cascade control
High-voltage section
■ Mains power terminals
■ Isolation switch (can be operated from the outside)
■ Motor contactor for each fan
■ Fuse for the electronics
■ Transformer for the DigiUnit controller, the mixing valve
and the actuators
■ Relays for emergency operation
■ Connecting terminals for actuators and temperature
sensors
■ Control box heating
Type LW.T-9 /DN5
Nominal air flow rate supply air/
exhaust air
7100 m³/h
Heat recovery efficiency, dry 75 %
Active power per motor 3.0 kW
Supply voltage 3 x AC 400 V
Frequency 50 Hz
8.2 Combi box T.T
Casing made from Aluzinc sheet steel with extract air grille
and access panel. The Combi box contains:
■ Aluminium plate heat exchanger with bypass; including
ER/bypass dampers with actuator for control of the energy
recovery
■ Extract air filter (bag filter class G4) with differential pres-
sure switch for filter monitoring
■ Extract air temperature sensor
■ Sound attenuation body as supply air diffuser
■ LPHW heating coil consisting of copper tubes with
aluminium fins
■ Frost controller
Type T.T-9
Heat output … kW
Heating medium LPHW … / … °C
at air inlet temperature … °C
8.3 Air-Injector D
Casing made from Aluzinc sheet steel with:
■ Vortex air distributor with concentric outlet nozzle, adjust-
able vanes and integrated sound attenuation cowl
■ Actuator for automatic adjustment of the air distribution
■ Supply air sensor
■ Electric connection box (includes the terminals for the
mixing valve heating)
Type D -9
Floor area reached … m²
RoofVent
®
twin heat
Specification texts