Hoval RoofVent CON-9, Design Handbook

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8 Specification texts
Supply and extract air handling unit RoofVent
®
twin pump,
consisting of:
■ Roof unit with energy recovery and control attachment
■ Combi box
■ Heating/cooling section
■ Air-Injector
■ Heat pump (Daikin ERQ250)
■ Control systems
All components are wired ready-to-connect.
8.1 Roof unit with energy recovery and control attach-
ment LW.P
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
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.
■ Control attachment with communication box and expan-
sion valve
DigiUnit controller DU5
Control module, fully wired to the components of the venti-
lation unit (fans, actuators, temperature sensors, frost
controller, filter monitoring, control attachment):
■ 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.P-9 /DN5
Nominal air flow rate, supply air/
exhaust air
7000 m³/h
Heat recovery efficiency, dry 75 %
Active power per motor 3.0 kW
Supply voltage 3 x 400 V AC
Frequency 50 Hz
8.2 Combi box T.P
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
■ Pipework of the working medium circuit
■ Sound attenuation body as supply air diffuser
Type T.P-9
8.3 Heating/cooling section K.W
Internally insulated Aluzinc sheet steel casing, containing
the evaporator coil made of copper tubes and aluminium fins
and the condensate separator with collecting channel and
drain connection; siphon for connection to a condensate line
(included in delivery)
Type K.W-9
Evaporation temperature °C
Heat output … kW
At air inlet temperature … °C
Cooling capacity ... kW
At air inlet temperature ... °C
At inlet humidity ... %
RoofVent
®
twin pump
Specification texts