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
Heating/cooling coil:
LPHW/LPCW coil consisting of copper tubes with aluminium fins
Access panel:
Access to the heating/cooling coil
Plate heat exchanger 2:
with bypass for energy recovery control
ER damper and bypass damper 2:
opposed dampers for regulation of energy recovery, with continuous actuator
Extract air filter:
Bag filter with differential pressure switch for filter monitoring
Access panel:
Access to extract air filter
ER damper and bypass damper 1:
opposed dampers for regulation of energy recovery, with continuous actuator
with spring return
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
Plate heat exchanger 1:
with bypass for energy recovery control, differential pressure switch and
condensate drain
Fresh air damper and recirculation damper:
opposed dampers for switching between fresh air and recirculation opera-
tion, with continuous actuator with spring return
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 for defrosting operation
Exhaust air grille:
Access to exhaust air fan
Access panel:
Access to supply air fan
Supply air fan:
twin impeller centrifugal fan with maintenance-free drive
Extract air grille
Frost controller
Condensate separator
Condensate drain connection
Fig. E2: Components of the RoofVent
®
twin cool
RoofVent
®
twin cool
Construction and operation