Application
Table Of Contents
- Overview
- Sequence of Operation
- Average Face Velocity Control
- AVS Calibration
- AO2 Flow Signal
- Control Loop - Damper Application
- Venturi Application
- Minimum Exhaust Mode
- Maximum Exhaust Mode
- Warning Limits
- Alarm Limits
- Alarm Output
- Horn Disable
- Sash Area Alarms
- Table Access Feature
- Emergency Mode
- Start-up/Decommission Mode
- Fail Mode
- Wiring Diagrams
- Point Database Application 6741
- Point Database Application 6742
Sequence of Operation
Venturi Application
17
Siemens Industry, Inc. Application Note 140-1344
Restricted 2015-11-09
2. Edit the inactive table values.
Since you have just switched the active and inactive portions of the table in
Step 1, the inactive values are now identical to what the active values were
moments ago. You can now edit these new inactive values by using V TABLE
PT to reference them in TABLE FLOW and TABLE VOLTS. Table
Venturi Air
Valve Table Statement
explains this in more detail.
3. Set V TABLE PT once again to the swap value. This places the newly edited
inactive values back into the active portion of the table statement (again, the active
and inactive portions of the table are simply swapped). However, before the swap
is finalized, the application analyzes your proposed values using the same logic as
in a regular calibration sequence.
NOTES:
1. If
FLOW COEF
is 0, the table edit feature uses a flow coefficient of 1.
2. If
DUCT AREA
is 0, the table edit feature uses a duct area of 1 square foot.
⇨ If your proposed values are good, then the swap is made and the edited
values are accepted into the active portion of the table. EXH VLV STAT
is set to CAL OK for exhaust calibration and control of the Venturi Air
Valve resumes.
⇨ However, if either point is set to NOTCAL, you must gather and view the
voltage/flow values to see where the problem lies.