183
183
183
183
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:
Summary of Contents for xLogic
Page 1: ......
Page 2: ......
Page 102: ...100 100 100 100 B B B B Blocks Blocks Blocks Blocks...
Page 105: ...103 103 103 103 G G G G M M M M status status status status...
Page 106: ...104 104 104 104 H H H H AM AM AM AM value value value value...
Page 164: ...162 162 162 162 If the Memory Read block had been triggered the Q1 of ELC 12 CPU will be set 1...
Page 204: ...202 202 202 202 Step Step Step Step 6 6 6 6 Moving Moving Moving Moving...
Page 226: ...224 224 224 224...
