Hoval RoofVent CON-9, Design Handbook

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Actuator Air-Injector:
adjusts the supply air discharge direction continuously from vertical to hori-
zontal
Frost controller:
prevents the coil freezing
Extract air grille
Extract air filter:
bag filter with differential pressure switch for filter monitoring
ER damper and bypass damper:
opposed dampers for regulation of energy recovery, with actuator
Access panel:
access to extract air filter
Weather louvre door:
access to the fresh air filter and to the DigiUnit terminal box
Fresh air filter:
bag filter with differential pressure switch for filter monitoring
Fresh air damper and recirculation damper:
opposing dampers for switching between fresh air, mixed air and recircula-
tion operation, with actuator
Heat generation assembly:
consisting of gas condensing boiler, conduit, circulating pump, expansion
vessel and condensate drain with neutraliser
Access panel:
for access to the heating coil
Heating coil:
LPHW coil consisting of copper tubes with aluminium fins
Gravity damper:
closes the bypass during shutdown and thus prevents heat loss
Exhaust air fan:
twin impeller centrifugal fan with maintenance-free drive and variable air flow
rate
Exhaust air grille:
access to exhaust air fan
Plate heat exchanger:
with bypass for energy recovery control and condensate drain
Access panel:
access to supply air fan
Supply air fan:
twin impeller centrifugal fan with maintenance-free drive
Fig. G2: Components of the RoofVent
®
condens
RoofVent
®
condens
Construction and operation