45
R E G U L AT E T H E T E M P E R AT U R E
The air temperature can be regulated either for con-
stant supply air temperature, constant room temper-
ature or constant exhtract air temperature.
For constant room temperature a sensor should be
placed in the room for room regulation.
Extract air regulation functions in a similar way
but with the difference being that the sensor is
placed at the extract air of the unit.
The temperature can be regulated in 5 sequences:
1. Cooling recovery
2. Cooling recovery/Summer Cooling:
The rotary heat
exchanger starts if the extract air temperature is
lower than outside temperatur.
3. Outside temperature=desired temperature:
When
the outside temperature is the same as desired sup-
ply air temperature the rotor stops.
4. Heat recovery:
The rotary heat exchanger starts to
recover the warmer room temperature.
5. Heat re heat:
In climate conditions where
the rotary heat exchanger, in spite of its high effi-
ciency, is not sufficient to reach the desired supply
air temperature, the controller can regulate the
built-in electric duct..
FA N C A PA C I T Y
Airflow (fan speed) is regulated via the week timer
that can be programmed for specific time points
when the fan speed should change from one speed
to antoher (e.g. home or away setting). A special
feature is that you can pressure compensate when
supplementary heating, using an open fire or stove
(the extract air fan then drops to a lower speed).
With the weektimer function it is possible to
schedule different fan speeds e.g away/boost or
standby. The fan speed can also be controlled by a
carbon dioxide (CO
2
) and humidity (RH) sensor so
that the unit gives a higher airflow (boost) when the
maximum limit value has been exceeded.
”Summer Cooling”
is a function where you can
use the cool outside temperature to cool down the
inside air. The fan speed is boosted when the ratio
between the outside temperature and the extract
air temperature is within the programmed criteria.
(Rotor stopped).
REGULATION FUNCTIONS
3.
Outside temperature = Desired temperature
1.
Cooling recovery
2.
Cooling recovery
or After cooling
4.
Heat recovery
5.
Heat recovery
+
After heat
Regulated
after heating
0-100%
Rotor 100%
Regulated rotor
0-100%
Cooling recovery
Rotor 100%
Regulated rotor
0-100%
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Summary of Contents for HERU LP
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