1.3 Operating
modes
This field displays symbols indicating the corresponding active operating modes. Depending on the heat
pump model and configuration performed by technical customer service, several operating modes may
be displayed at the same time.
Operating mode DIRECT HEATING / operating mode DIRECT COOLING
The heat pump delivers hot/cold water directly to the heating/cooling system and adjusts the
output according to the consumption of the dwelling. The supply temperature and supply rate
are adjusted continuously to optimize system performance. These modes of operation are
activated when the heat pump receives a demand signal from equipment installed in rooms
(thermostats, th-Tune terminals, thT terminals or TH sensors).
Operating mode BUFFER HEATING / operating mode BUFFER COOLING
The heat pump supplies hot/cold water to the buffer tank of the heating/cooling system.
Output power, supply rate and supply temperature are controlled continuously to maintain
tank temperature and optimize system performance.
These modes of operation are activated when the buffer tank temperature is lower/higher
than the temperature difference required for activation.
Operating mode HOT WATER
The heat pump supplies hot water to increase the temperature of the storage tank to reach the
hot water supply temperature as soon as possible.
This mode of operation is activated when the temperature of the hot water tank is lower than
the temperature difference required for activation.
Operating mode SWIMMING POOL
The heat pump supplies hot water to the heat exchanger for the swimming pool and regulates
output power. The supply rate and supply temperature are adjusted continuously to optimize
system performance.
This operating mode is activated when the heat pump receives a message about the need to
produce heat in the swimming pool.
Operating mode LEGIONELLA PROTECTION
The heat pump raises the tank temperature to the temperature set by the technical customer
service for the Legionella Protection program. First, the temperature is raised with the help of
a compressor; then the additional hot water preparation system (if any) is activated until the
final temperature is reached.
This operating mode is activated according to the weekly Legionella Protection program.
Activation of different OPERATING MODES may depend on the time programming
functions or heat pump operation priorities (HOT WATER, HEATING, COOLING,
SWIMMING POOL).
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Zehnder ComfoBox Q / ComfoHeat User Manual, BA-CBQ_DE-CH V1.0
