Function and operation
Vent 402 – 6721815546 (2021/03)
20
Table 11 Booster heater settings
If the Maximum limit function is inactive and the heat pump is in heating
mode, the safety thermostat may trigger for heating circuit flows below
1,5 l/minute.
7.8 System settings
7.8.1 Menu: Heating
Table 12 Heating curve settings
Building type
If adjusting is activated, the oscillations in the outdoor air temperature
are adjusted according to the building type. By adjusting the outdoor air
temperature, the thermal inertia of the building mass is included in the
control.
Table 13 Building type settings
Auxiliary heater
block
1)
Select [Yes] to activate. This setting blocks the
booster heater so that all heat and hot water
production is only carried out by the heat pump
(compressor). The booster heater is allowed to start
during alarm operation.
Maximum limit Un-tick [Inactive] to activate. Set how many degrees
below the compressor maximum temperature the
booster heater should start to step wise decrease.
This function allows the compressor to be used as
much as possible.
With the function inactive, the booster heater does
not stop, but is used up to the booster heater
maximum temperature. The compressor is then
switched off at the compressor maximum
temperature.
1) This function should only be used in the event of a malfunction of the booster
heater. The compressor cannot handle heat and hot water production entirely on
its own.
Menu item Description
Heating curve
HC1
Adjust the base and end points of the heating curve
according to the needs of the house. It is also
possible to bend the heat curve in a single point.
The end point is the flow temperature which is
reached at the lowest outdoor air temperature and
therefore affects the slope of the heating curve.
Cur. room temp
HC1
Set the desired room temperature for the selected
heating circuit.
Room influence
HC1
0 ... 10: This factor determines how much the
measured room temperature may affect the flow
temperature by displacing the heat curve in parallel.
The higher the value set, the higher the deviation is
and the impact becomes greater.
Heating curve
HC2
Adjust the base and end points of the heating curve
according to the needs of the house. It is also
possible to bend the heat curve in a single point.
The end point is the flow temperature which is
reached at the lowest outdoor air temperature and
therefore affects the slope of the heating curve.
Cur. room temp
HC2
Set the desired room temperature for the selected
heating circuit.
Room influence
HC2
0 ... 10: This factor determines how much the
measured room temperature may affect the flow
temperature by displacing the heat curve in
parallel
1)
(only available if a room unit has been
installed). The higher the value set, the higher the
deviation is and the impact becomes greater.
Mixer run time
HC2
0 ...20 ... 1200 s: Runtime of the mixing valve.
Menu item Description
Building
damping
[None]: The measured outdoor air temperature is
not adjusted.
Light | Medium | Heavy: The set building type affects
the measured outdoor air temperature. The outdoor
air temperature is adjusted ( Chapter ).
Heating On/Off
hyster.
50...600... 1500 K x min: Set the delay to activate
the heating mode. The delay depends on the time
and deviation from the desired outdoor air
temperature.
Htg.-HW alt.
mode
[Yes]: If there is a simultaneous demand for heating
and DHW mode, the system switches between
heating mode and DHW mode based on the run time.
No: The DHW mode has higher priority and
interrupts the heating mode, if necessary.
HW maximum
time
0...30...120 min: Run time for DHW mode.
Heating
maximum time
5...50...120 min: Run time for heating mode.
1) The menu only appears if a room unit has been installed
Menu item Description
Light (low
storage
capacity)
Type
E.g. prefabricated building, beam and column
construction, timber frame construction
Effect
• Little adjustment of the outdoor air temperature
• Rapid increase in flow temperature
Medium
(medium storage
capacity)
Type
E.g. house made of hollow blocks (default setting)
Effect
• Medium adjustment of the outdoor air
temperature
• Medium increase in flow temperature
Heavy (high
storage
capacity)
Type
E.g. brick houses
Effect
• Large adjustment of the outdoor air temperature
• Slow increase in flow temperature
Menu item Description
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