Appendix Application Illustration 95
y The fresh blower will run only if the flow monitor senses that the exhausted gas blower works properly.
y If any irregularity takes place on air in blower and air out blower, the warning lamp will light.
The control circuit for the traditional ventilation system is shown below:
The ventilation system is wholly controlled by the airflow monitor. If there is no flow air in the room after a
designated duration of time, the system will activate the warning system so the user shall shut off the system.
Devices Applied
MC1 main contactor
MC2 main contactor
S0(NC contact) stop switch
S1(NO contact) start switch
S2(NO contact) air flow monitor
S3(NO contact) air flow monitor
H1operation indicator
H2 alarm light
Wiring Diagram and Program with SG2 applied in Ventilation System.
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