Part Two
Venturi with Feedback Calibration
NOTE: LOM Venturi Valves are optional and may not be installed in your system.
1. Obtain the venturi valve minimum and maximum flow, either by reading the label on the
venturi valve or by performing duct traverses when the venturi valve is fully closed and fully
opened.
2. Set MIN FLOW to the minimum venturi valve flow.
3. Set MAX FLOW to the maximum venturi valve flow.
4. Venturi with Feedback calibration is now complete. Exit the menu.
NOTE: Use BALANCE MODE to verify Venturi with Feedback calibration and adjust the
K-FACTOR.
Supply/Exhaust Switch Calibration
NOTE: Flow switches are optional and may not be installed in your system.
Flow switches do not actually measure the flow, but are designed to
provide an open or closed signal to indicate the presence or absence
of flow.
1. Set the LOW FLOW SIGNAL to match the low flow indication from the switch. OPEN means
the switch will open to indicate low flow. CLOSED means the switch will close to indicate low
flow.
Door Switch Configuration
NOTE: Door switches are optional and may not be installed in your system.
1. Set the DR OPEN SIGNAL to match the door open indication from the switch. OPEN means
the switch will open to indicate the door is open. CLOSED means the switch will close to
indicate the door is open.
Temperature Sensor Configuration
NOTE: Temperature sensors are optional and may not be installed in your
system.
1. Adjust the SENSOR SPAN so the displayed temperature matches a reference measurement.
Use the RESET CAL item to reset the SENSOR SPAN back to the factory default.
Relative Humidity Sensor Configuration
NOTE: Relative Humidity sensors are optional and may not be installed in
your system.
1. Set the SENSOR OUT MIN to the minimum reading of the relative humidity sensor. This is
usually 0%.
2. Set the SENSOR OUT MAX to the maximum reading of the relative humidity sensor. This is
usually 100%.
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