Cooling In Summer Operation - Maico WS 320 serie Bedienungsanleitung

17.3 Zone ventilation
The optional zone ventilation generally runs
in ventilation level II (nominal ventilation). The
control distributes the air volume available
over two room zones, e.g. living areas and
bedrooms.
Zone ventilation starts when you select the
Auto Time operating mode (provided zone
ventilation is set there).
Conditions for zone ventilation
● Installed by specialist installer
● Additional circuit board 1
● DIP switch set to zone ventilation
● Zone shutter with parameter zone control =
yes activated
● Time programme settings for zone 1 and 2
or zone sensor (automatic sensor mode)
Zone ventilation is
● either permanently assigned for zone 1 or
zone 2 or
● automatic according to the air quality values
with Zone Sensor.
It is set in the Summer and Winter  time
programme (Chapters 8.3 and 17.2).
If zone 1 or zone 2 is set:
The set zone is supplied with the greater air
volume. The parameter Reduction in volumet-
ric flow states the % by which the volumetric
flow of nominal ventilation is reduced in the
stated zone (max. 60 %).
With Zone Sensor setting:
The zone with the lower air quality is supplied
with the greater air volume, the other with
the minimum change of air needed. The air
quality values determined with the optional
CO and VOC sensors are analysed for the
2
control.
Zone ventilation is deactivated with a time
limit if the unit is changed manually to another
ventilation level or if the bypass is opened.
17 Frequently asked questions (FAQs) | UK

17.4 Cooling in summer operation

Ventilation units with a bypass or geo-
thermal heat exchanger have their cooling
function released during the Summer season.
The supplied air is fed past the heat exchang-
er directly into the living areas. There is no
transfer of heat to the supply air in the heat
exchanger, the exhaust air is transported
outside directly without heat recovery.
The control releases cooling via the
bypass when the set maximum room
temperature is reached (measurement
on temperature sensor).
Setting with parameter Temperatures/max.
room temperature
Setting range Max. room temperature
18 to 30 °C, factory setting 26 °C
Conditions for cooling
● Summer season or T
simple control unit in solo mode or geother-
mal heat exchanger connected
● and T
< T
outside air
Cooling minimum T-supply air (Supply air
temp. )
Limits the minimum supply air temperature
if cooling with bypass or brine earth heat
exchanger. The bypass partially closes and/or
the brine geothermal heat exchanger cuts out
when the temperature falls below the set limit.
The ventilation unit regulates the supply air
temperature to the set value.
No active cooling. Cooling function
i
only if basic conditions are met.
Setting with parameter: Temperatures/
Cool T-supply air min
Setting range of supply air temperature
8 to 29 °C, factory setting 14 °C.
> 5 °C with
outside air
room
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