Adjustable Sequences for Cooling
The controller can be set for one of two different sequences for cooling:
•
Air – Water with temperature - and carbon dioxide control
•
Water – Air with temperature - and carbon dioxide control
Air – Water with temperature - and carbon dioxide
control
Temperature/CO
2
26
°
C
1000 PPM
24
°
C
800 PPM
22
°
C
600 PPM
Time
period
Water
CO
2
Temperature
Air 2
Air 1
Occupancy
No
occupancy
20%
50%
100%
Flow %
Figure 7. Typical diagram dealing with the air-to-water sequence with temperature control.
Note! Air 2 is valid only for W4.2
The sequence involves the following: If occupancy is registered in the room
and if the temperature is at a certain level, the system starts a cooling
process that cools down the room by increasing the airflow.
If the temperature rises more and the increased airflow is not sufficient for
maintaining the required temperature, the cooling process is supplemented
with cooling by circulating chilled water in the water pipes.
If the level of carbon dioxide in the room exceeds a certain level, the air
system is activated in order to reduce the level and keep it constant.
13
20210201 Swegon reserves the right to make design changes.
CONDUCTOR
W4
Summary of Contents for 20210201
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