Information On Disposal - Viessmann VITODENS Operating Instructions Manual

Appendix
Mechanical ventilation terminology
Ventilation with heat recovery, bypass blocked
The air that is introduced into the rooms (supply air) is
preheated with the heat from the extracted air (extract
air) via a heat exchanger in the ventilation unit. For
this, bypass is not active.
E
This means the heat loss is very low, compared to air-
ing via open windows.
Ventilation without heat recovery, bypass enabled
When bypass is active, 100 % of the extract air
F
flow is routed past the heat exchanger, and filtered
fresh outdoor air at outside temperature is introduced
into the rooms.
This allows cool outdoor air to be routed into the
rooms, e.g. during cooler summer nights (passive cool-
ing).
The bypass is enabled if all of the following conditions
are met:
The outdoor air is cooler than the indoor air:
■
The outdoor air is at least 4 °C cooler than the room
temperature.
■ The rooms are warmer than required:
The room temperature is at least 1 °C higher than
the "Set room temperature" for ventilation.
The temperature of the air being introduced exceeds
■
the minimum temperature for passive cooling ("Min.
supply air temp. Bypass").
Air flow rates
In order to prevent any negative or positive pressures
developing in your rooms, the flow rate of the supply
air must exactly match the flow rate of the extract air.
These air flow rates are set by your qualified contractor
during commissioning.
Only with Vitovent 300-F: Regulating the humidity
and carbon dioxide concentration (CO
tion)
If a CO /humidity sensor is connected to the ventilation
2
unit, the air flow rate is automatically adjusted subject
to the captured CO concentration and the humidity
2
level. For this, the "Normal" operating status must be
active in the "Automatic ventilation" operating pro-
gram.

Information on disposal

Disposal of packaging
You heating contractor will dispose of the packaging of
your Viessmann product.
64
(cont.)
Frost protection for the heat exchanger in the ven-
tilation unit
In the heat exchanger of the ventilation unit the out-
door air is heated by the extract air from the rooms.
This causes the extract air to cool down, which in turn
leads to condensate forming in the heat exchanger.
At low outside temperatures, this condensate can
freeze in the heat exchanger.
Frost protection function:
■ The outdoor air is preheated by an electric preheat-
ing coil, if installed (accessories).
The air flow rate is reduced, if necessary to a point
■
where the fans go into standby.
Note
If the frost protection function is active, the indicated
ventilation level may deviate from the ventilation level
selected. The ventilation level displayed is adjusted to
reflect the reduced air flow rate brought about by the
frost protection function.
Supply air heating via heating circuit 1 (ventilation
heating circuit).
If a hydraulic reheating coil (accessories) is installed in
your ventilation unit, the supply air can be heated by
the heat generator. The outdoor air preheated in the
heat exchanger of the ventilation unit is then reheated
via the hydraulic reheating coil of the heat generator.
In such a case, set the room temperature and time
program for central heating via the menu for heating
circuit 1.
Note
The level of (central) heating output that can be trans-
mitted via the ventilation heating circuit is only minimal.
Using supply air heating as the sole heat source is
therefore only recommended for highly insulated build-
ings (e.g. passive house).
concentra-
2