Application

Sequence of Operation
Venturi Application
14
Siemens Industry, Inc. Application Note 140-1344
Restricted 2015-11-09
Table Venturi Table Statement Example shows an example of active values in a
Venturi table statement after the Venturi Air Valves have been calibrated (note reverse
acting exhaust voltage). Table statement values will vary per system.
Venturi Table Statement Example (active values).
Exhaust Venturi Air Valve
cfm
volts
0
a)
10
a)
180 5.48
216 5.08
244 4.68
340 3.88
368 3.48
452 2.98
476 2.73
504 2.48
572 1.98
604 1.73
618 1.48
712 0.98
760 0.73
800 0.48
904 0
a)
These voltage/flow values constitute the “low flow”
element (or “point”) for the Exhaust Venturi Air
Valves. They are shown here with factory default
values. They are not altered during calibration—they
must be set manually. However, they only need to be
set if the Venturi Air Valve is going go be operating at
low flow settings of less than 350 fpm. Otherwise,
they can be left at default and ignored.