Hoval RoofVent CON-9, Design Handbook

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2.3 Operating modes
The RoofVent
®
LK 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/cooling ................ Off
VE2 Ventilation
The RoofVent
®
unit blows fresh air into
the room and draws off spent room air.
Heating/cooling and energy recovery
are controlled on the basis of heating
demand and 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/cooling ................ 0 - 100 %
*)
*) depending on heat or cool demand and the 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: When heating or
cooling is required, the RoofVent
®
unit
draws in room air, heats or cools it and
blows it back into the room.
The room temperature set value day is
active.
For pre-heating and
pre-cooling
Supply air fan ................... On
*)
Exhaust air fan ................. Off
Fresh air damper .............. Closed
Recirculation damper ....... Open
Heating/cooling ................ On
*)
*) during heat or cool demand
RECN Recirculation night
Like REC, but with room temperature set
value night
During the night
and on weekends
RoofVent
®
LK
Construction and operation