Hoval RoofVent CON-9, Design Handbook

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70
Code
1)
Operating mode Use Diagram Description
EA Exhaust air
The RoofVent
®
unit extracts spent
room air. There is no room temperature
control.
for special cases Supply air fan ................... Off
Exhaust air fan ................. On
Energy recovery ............... 0 %
Fresh air damper .............. Open
Recirculation damper ....... Closed
Heating ............................ Off
SA Supply air
The RoofVent
®
unit blows fresh air
into the room. Heating is controlled
depending on the heat demand and
temperature conditions.
Spent room air passes through open
windows and doors or another system
provides extraction.
The room temperature set value day is
active.
for special cases Supply air fan ................... On
Exhaust air fan ................. Off
Energy recovery ............... 0 %
Fresh air damper .............. Open
Recirculation damper ....... Closed
Heating ............................ 0 - 100 %
NCS Night cooling summer
On/Off operation: If current tempera-
tures allow, the RoofVent
®
unit blows
cool fresh air into the room and extracts
warmer room air. The room temperature
set value night is active.
The unit blows the supply air downwards
vertically for greatest possible efficiency.
for free cooling
during the night
Supply air fan ................... On
*)
Exhaust air fan ................. On
*)
Energy recovery ............... 0 %
Fresh air damper .............. Open
*)
Recirculation damper ....... Closed
*)
Heating ............................ Off
*) depending on temperature conditions
– Emergency operation
The RoofVent
®
unit draws in room air,
warms it and blows it back into the room.
The heater is switched on via manual
control of the mixing valve.
There is no room temperature control.
if the DigiNet
system is not oper-
ating (e.g. before
commissioning)
Supply air fan ................... On
Exhaust air fan ................. Off
Energy recovery ............... 0 %
Fresh air damper .............. Closed
Recirculation damper ....... Open
Heating ............................ On
1)
This is the code for the respective operating mode in the DigiNet control system (see Part L 'Control systems').
Table D1: Operating modes of the RoofVent
®
twin heat
RoofVent
®
twin heat
Construction and operation