23
Outdoor air temperature (heat exchanger air intake) is
> "Min. supply air temperature for bypass 7D0F"
plus 0.5 K
Note
Further conditions must be met in order for passive
cooling to be switched on: See "Set extract air tem-
perature 7D08" and chapter "Passive cooling" in the
"Function description".
Setting 1 ≙ 0.1 °C
7D2C Strategy, passive frost protection !
Vitovent
200-C 300-C 300-W
X — —
This parameter is used to specify which defrost func-
tion is switched on if the heat exchanger ices up.
Conditions:
"Enable electric preheating coil 7D01" is set to "0".
Value Meaning
"0" Shutdown of fans:
If the heat exchanger is iced up, both fans
are switched off.
Restart according to "Starting block, venti-
lation periods 7D5E, 7D5F"
"1" Defrosting via bypass:
If the heat exchanger is iced up, the bypass
opens and the cool outdoor air is routed past
the heat exchanger directly into the rooms.
There may be a possibility of draughts.
"2" Defrosting via imbalance:
If the heat exchanger is iced up, the supply
air fan is switched off.
Note
Calling up the time for restarting the fan/fans when the
frost protection function is enabled: "Diagnosis"
"Ventilation"
7D2E Type of heat exchanger !
Vitovent
200-C 300-C 300-W
X — —
Type of heat exchanger in the ventilation unit
Value Meaning
"0" Countercurrent heat exchanger:
Via the countercurrent heat exchanger, a
large part of the energy from the extract air is
transferred to the outdoor air.
"1" Enthalpy heat exchanger:
In addition to heat recovery in accordance
with the countercurrent principle, some of the
humidity from the extract air is also transfer-
red to the supply air.
Parameter settings
7D0F Min. supply air temperature for bypass (cont.)
5816558
Parameter
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