Hoval RoofVent CON-9, Design Handbook

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124
Code
1)
Operating mode Use Diagram Description
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
Energy recovery ............... 0 %
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
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/cooling ................ Off
SA Supply air
The RoofVent
®
unit blows fresh air into
the room. Heating/cooling is controlled
on the basis of the heating/cooling
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/cooling ................ 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 vertically
downwards to achieve the 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/cooling ................ Off
*) depending on temperature conditions
1)
This is the code for the respective operating mode in the DigiNet control system (see Part L 'Control systems').
Table F1: Operating modes of the RoofVent
®
twin pump
Note
In heating mode, the heat exchanger of the heat pump may freeze. The
system switches to defrosting operation to prevent a drop in heat output.
The maximum duration of the defrosting phase is 10 min; during this time,
the RoofVent
®
unit is in recirculation operation.
RoofVent
®
twin pump
Construction and operation