Commissioning Instructions
Table Of Contents
- Before You Begin
- Verifying Power
- Verifying Slave Mode Application Number
- Setting Controller Address
- Setting the Application
- Setting Display Units
- Testing the Operator Display Panel
- Setting Duct Area
- Setting Airflow Sensing Input
- Setting Flow Coefficients
- Automatic Calibration Option
- Setting Blank Display
- Setting Display Weight
- Setting Display Resolution
- Changing Exhaust Minimum
- Changing Exhaust Maximum
- Changing Face Velocity Setpoints and OCC Delay
- Setting Hi and Low Warn Limits
- Setting Hi and Low Alarm Limits
- Setting Alarm Timer
- Setting Emergency Setpoint
- Setting Emergency Timer
- Setting Remote Purge
- Fume Hood Specific Sash Setup and Calibration
- Setting External Face Area Input
- Setting Sash Area Alarms
- (Optional) Setting Damper Control — Application 6741
- Checkout of Damper — Application 6741
- (Optional) Setting Airflow Input Type
- (Optional) Calibrating the DP Transmitter without an Autozero Module
- (Optional) Calibrating with an Autozero Module
- AVS FAILMODE
- Setting Airflow Control — Application 6742
- Range of Airflow Control – Application 6742
- Configuring Airflow Control - Application 6742
- Setting AO2 Range
- Setting AO2 Voltage Minimum
- Start-up/Decommission Mode
- Loop Tuning Procedures
- Configuring BACnet Parameters
- Auto Discover and Auto Addressing
- Flashing Controller Firmware
Before You Begin
Configuring Airflow Control - Application 6742
26
Siemens Industry, Inc. Start-up Procedures 140-1345
Restricted 2015-11-09
4. Adjust the voltage to the exhaust actuator, EXH AO3, until the desired minimum
flow is reached. Verify the flow value with a balancer and write down the voltage
value.
5. Set V TABLE PT to 31. (Setting V TABLE PT to 31 allows the flow (cfm) and
voltage values from the first element of the active exhaust table to be displayed in
TABLE FLOW and TABLE VOLTS where they can be edited.)
6. Enter the minimum cfm flow value for the exhaust Venturi air valve into TABLE
FLOW.
7. Enter the minimum voltage value for the exhaust Venturi air valve actuator into
TABLE VOLTS.
8. Set V TABLE PT to 0.
Venturi Airflow @ 350 fpm.
Valve Size in Inches
Cfm
5 48
6 69
8 122
10 191
12 275
Dual 10 380
Dual 12 550
Triple 12 825
Editing the Venturi Table (Modes 1, 3)
NOTE:
This procedure does not apply when running Venturi actuators in the PID Only Mode.
See
PID Only Mode
for more information.
Normally, there is no need to view or edit the Venturi table statement. However, if the
Venturi air valve(s) seem to be reacting incorrectly, or if calibrating the Venturi air
valves resulted in an overwrite of the supply or exhaust low flow point, then you may
need to view or edit the Venturi table statement. You can do this using the following
points: V TABLE PT, TABLE FLOW and TABLE VOLTS. See Table
Venturi Air Valve
Table Statement
.
A Venturi Air Valve table statement consists of two sets of voltage/flow values—one
set is active and the other inactive. When you run the calibration, the first thing that
happens is that the inactive table values are filled in with new values generated by the
calibration. Then the application checks these new values to make sure they are good.
If they pass (that is, if enough increment correctly), these new values become the
active values, and the old active values become inactive. However, if the new values
don’t pass, then the old active values remain active.
Running a successful calibration sequence is one way of changing or updating the
active values. You can also edit the table manually. Normally this is not necessary, but
if you are having flow control problems you may need to edit the table.