Hoval RoofVent CON-9, Design Handbook

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2.3 Operating modes
The RoofVent
®
LH has the following operating modes:
■ Off
■ Ventilation
■ Ventilation (reduced)
■ Recirculation
■ Recirculation night
■ Exhaust air
■ Supply air
■ Night cooling summer
■ Emergency operation
The DigiNet control system controls these operating modes automatically per
control zone, in accordance with the scheduler (exception: emergency operation).
In addition, you can:
■ manually switch the operating mode of a control zone,
■ switch each individual RoofVent
®
unit to the following operating modes: Off,
Recirculation, Exhaust air, Supply air and Emergency operation.
Code
1)
Operating mode Use Diagram Description
OFF Off
The fans are turned off. Frost protec-
tion remains active. There is no room
temperature control.
If the unit is not
needed
Supply air fan ................... Off
Exhaust air fan ................. Off
Fresh air damper .............. Closed
Recirculation damper ....... Open
Heating ............................ Off
VE2 Ventilation
The RoofVent
®
unit blows fresh air into
the room and draws off spent room
air. The heating and the fresh air rate
are controlled depending on the heat
demand and the temperature conditions.
The room temperature set value day is
active.
During room use Supply air fan ................... On
Exhaust air fan ................. On
Fresh air damper .............. 0 - 100 %
*)
Recirculation damper ....... 0 - 100 %
*)
Heating ............................ 0 - 100 %
*)
*)
depending on heat demand and set
minimum fresh air rate
VE1 Ventilation (reduced)
Like VE2, but with reduced air flow rate
The room temperature set value day is
active.
During room use
(only for fans with
variable air flow
rate)
REC Recirculation
On/Off operation: In the event of heat
demand, the RoofVent
®
unit draws in
room air, warms it and blows it back into
the room.
The room temperature set value day is
active.
For pre-heating Supply air fan ................... On
*)
Exhaust air fan ................. Off
Fresh air damper .............. Closed
Recirculation damper ....... Open
Heating ............................ On
*)
*) during heat demand
RECN Recirculation night
Like REC, but with room temperature set
value night
During the night
and on weekends
RoofVent
®
LH
Construction and operation