Hoval RoofVent CON-9, Design Handbook

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8 Specification texts
RoofVent
®
LKW supply and extract air handling unit,
consisting of:
■ Roof unit with energy recovery
■ Filter box
■ Heating/cooling section
■ Air-Injector
■ Control systems
All components are wired ready-to-connect.
8.1 Roof unit with energy recovery LW
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 DigiUnit terminal 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
■ Plate heat exchanger made of aluminium with bypass,
condensate collecting channel and siphon to the roof,
including ER and bypass dampers with actuators to regu-
late the energy recovery
■ Maintenance-free, direct-drive supply air fan
■ Maintenance-free, direct-drive exhaust air fan
■ 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-… /DN5
Nominal air flow rate, supply air/
exhaust air
… m³/h
Heat recovery efficiency, dry … %
Active power per motor … kW
Supply voltage 3 x AC 400 V
Frequency 50 Hz
8.2 Filter box F00 / F25 / F50
Casing made from Aluzinc sheet steel with extract air grille
and access panel. The filter box includes:
■ 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
Type F-…
8.3 Heating/cooling section K.C / K.D
Internally insulated Aluzinc sheet steel casing, containing the
heating/cooling coil made of copper tubes and aluminium
fins, the condensate separator with collecting channel and
the frost controller; siphon for connection to a condensate
line (included in delivery)
Type K.__-9
Heat output … kW
Heating medium LPHW … / … °C
At air inlet temperature … °C
Cooling capacity … kW
Cooling medium LPCW … °C
At air inlet temperature … °C
At inlet humidity … %
RoofVent
®
LKW
Specification texts