32
8 - CONTROL
8.6 VENTILATION
AIR FLOW MODULATION
REDUCED FLOW IN WINTER
With an outdoor air temperature lower than -5°C, the
flow is reduced (
A
) to maintain the ambient inlet air
temperature (
I
) approximately equal to the internal
temperature ( 20°C) .
In this situation the need of ventilation is completely
satisfied
.
NOMINAL FLOW
With an outdoor temperature included between -5°C
and +20°C, the fresh air flow remains constant (
B
).
The ambient inlet air temperature (
II)
increases at the
outdoor temperature increasing.
In this situation Airflow 2020, in addition to satisfy the
needs of ventilation, satisfies in whole or in part the
heat request.
FLOW
With an outdoor temperature included b20°C
and +24°C is effected a free-cooling increasing the inlet
fresh air flow and disabling the compressor (
C
).
The ambient inlet air temperature is equal to the
outdoor temperature (
III
).
REDUCED FLOW FOR DEHUMIDIFICATION
In order to effect more effectively the fresh air
dehumidification, Airflow 2020 reduces the flow
modulating the fan speed (
D
), so it is possible to cool
the rooms by using the radiant panels and to effectively
dehumidify.
OUTDOOR AIR temp
S
U
P
P
LY
t
em
p
A
IR
f
low
OUTDOOR AIR temp
SUMMER
The ventilation is stopped if the temperature:
OUTSIDE
high, more than 40°C
or
AMBIENT
high, more than 35°C
or
SUPPLY
low, below 5°C
or
SUPPLY
high, more than ROOM SETPOINT value + 6°C
WINTER
The ventilation is stopped if the temperature:
OUTSIDE
low, below -15°C
or
AMBIENT
low, below 10°C
or
SUPPLY
low, below 8°C
or
SUPPLY
high, more than 45°C
STOPPING THE FANS
In certain circumstances, ventilation is stopped to prevent sudden temperature changes in the room.
When the ventilation is turned off, the compressor is turned off as well.
Summary of Contents for Airflow 2020
Page 1: ...Installation and operating manual Décember 2017 ...
Page 69: ...User manual ...
