49
REGULATE THE TEMPERATURE
The air temperature can be regulated either for
constant supply air temperature, constant room tem-
perature 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 temper-
ature is lower than outside temperatur.
3. Outside
temperature=desired
temperature:
When the outside temperature is the same as
desired supply 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 efficiency, is not sufficient to reach the
desired supply air temperature, the controller
can regulate the built-in electric duct.
FAN CAPACITY
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 schedu-
le 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%
1270421_utg2_HERU_K_SV_EN.pdf 49
2018-03-12 10:00:17
Summary of Contents for HERU 70 K EC
Page 12: ...12 REGLERSCHEMA HERU K SOM VISAR SAMTLIGA GIVARE FL DESRIKTNING H GER GT7...
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Page 48: ...48 CONTROL DIAGRAM HERU K SHOWS ALL SENSORS FLOW DIRECTION RIGHT GT7 EXHAUST AIR EXTRACT AIR...
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Page 79: ...79 WIRING DIAGRAM KOPPLINGSSCHEMA 4040203 HERU 70 K A With electrical heater Med elv rmare...
