OPERATING AND INSTALLATION MANUAL HEAT PUMP COMBI UNIT PKOM4 PAGE 15
USER
GENERALSPECIALIST PERSONNEL
Manual selection
When the time program is deactivated
[OFF], the ventilation level can be selected
manually. This selection is carried out via
the [+] or [-] button and via the [OK] button
in the lower section of the operating unit.
•
Level 1: The system is running in
ventilation level 1.
•
Level 2: The system is running in
ventilation level 2.
•
Level 3: The system is running in
ventilation level 3.
•
Level 4: The system is running in
ventilation level 4.
Heat pump mode
If the heat pump is running in
heating mode, ventilation level 3
is generally activated for this period of time.
If the heat pump is running in cooling oper-
ation, ventilation level 4 is activated. These
minimum air volumes are necessary to
be able to transport the heating or cooling
energy in each case.
There are various configurations and oper-
ating modes that result in your ventilation
unit being operated with air volumes other
than those set. These include:
CO
2
-controlled regulation (Figure 1)
Acceptable indoor air should not exceed a
CO
2
value of 1000 ppm, meaning that active
ventilation should take place every 1 to 2
hours. A living room ventilation unit with
CO
2
concentration-based control (CO
2
sen-
sor module available as part of the acces-
sories) automatically ensures that a defined
CO
2
value of 1000 ppm is not exceeded.
Humidity-controlled regulation (Figure 2)
The relative humidity is a factor that also
contributes significantly to a comforta-
ble living climate. Acceptable humidity is
defined by a comfort window.
When humidity regulation is activated, the
air volume flow is reduced below a relative
room humidity of 35 % and increased above
a relative room humidity of 60 % (see Sec-
tion 14.3, page 37).
Figure 1: Increase in CO
2
concentration in a flat/room with occupants and without mechanical ventilation.
Figure 2: Comfort window as a function of the air temperature and relative humidity of the room.
8.1.4 Demand-controlled
air volume regulation
Decreasing
ability to
concentrate,
headache
Closed window
Mech. residential ventilation
Fresh outdoor air: 400 ppm
® komfortlüftung.at
CO2 concentration in ppm
Disruptive
Pleasant
Hours
Based on Leusden und Freymark
Graphics: www.komfortlüftung.at
Uncomfortably damp
Comfortable
Still comfortable
Uncomfortably dry
Ideal 35 % to 45 % RH
Structural-physical upper limit
(condensate, mildew ...) approx.
45 % to 55 %
Relative humidity (RH) of the ambient air in %
Lower comfort limit for humans 20 %
Ambient temperature in °C
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