Operating mode
It is possible to provide the unit with an input which determines whether it will operate in Auto, Heating
or Cooling.
Ventilation
Operating mode Settings:
Standard setting:
Description:
Auto/ Heating/ Cooling
Auto
Auto : The unit operates in accordance with the set
values.
Heating : The unit operates in accordance with the set
values, but is not set to perform cooling.
Active cooling has been blocked and the bypass
damper will not open.
Cooling : The unit operates in accordance with the set
values, but is not set to perform heating.
Active heating and the after heating element have
been blocked.
With this setting the unit can perform cooling in winter
operation under the correct conditions.
The functions Heating and Cooling override the weekly schedule, and can be used in situations such as
the following:
Heating
A weekly schedule has been made in which the room temperature is lowered between 8.00 and 16.00
during the day, when the residents are at work or school. During the autumn half-term they no longer
wish to lower the daytime temperature as they are at home that week. Instead of cancelling the weekly
schedule, this can be overridden by setting the unit to heating mode. The unit now operates in
accordance with the desired room temperature, which can be set on the front of the touch-panel.
Cooling
A large modern house with extensive south-facing windows can start having overheating problems as
early as March/April, if the sun is shining form a cloudless sky. As the outdoor temperature maybe only
is 8 °C, the unit will be running in winter mode, with a setting which prevents it from cooling. This
limitation can be overridden by setting the unit to cooling mode. The unit will try to cool the indoor air,
if the right conditions are present. Cooling will take place via bypass and at high indoor temperatures
with active cooling via the heat pump.
ATTENTION
The system will automatically change to Auto on the next change in the weekly schedule, is such
is programmed.
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