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6
6
6
6 .3
.3
.3
.3 Ventilation
Ventilation
Ventilation
Ventilation system
system
system
system
Requirements
Requirements
Requirements
Requirements for
for
for
for a
a
a
a Ventilation
Ventilation
Ventilation
Ventilation system
system
system
system
A Ventilation system supplies fresh air into a room and exhausts the contaminated air. Let us
look at the following sample system:
• A room contains an extractor fan and a fresh-air fan.
• Each fan is monitored by means of a flow sensor.
• The pressure in the room may rise above the atmospheric pressure.
• The fresh-air fan may only be switched on if the flow sensor signals the safe operational state
of the extractor fan.
• A warning lamp indicates failure of one of the fans.
6
6
6
6 .3.1
.3.1
.3.1
.3.1 Standard
Standard
Standard
Standard solution
solution
solution
solution
The control circuit diagram of Ventilation system formerly as follows:
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