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© Ventam Systems Ltd
Control Schematic
Flow Sensor
Status signal
Air Flow
240vac
signal to
Isolation
valve
Plastic tubing
Fan
Extract fan
isolator or
speed
controller
Gas
proving
Valve
Gas Flow
Extract
Duct
VENTAM
85
CONTROL
SYSTEM
Air Flow pressure
switch mounted
adjacent to each
fan.
Com■
N/O ■ -ve