Installation - Titus - LIT-12014051 - Valve - Venturi Valve

Titus Venturi Air Valve Installation Guide

Product name
Venturi Valve
Document type
Installation Guide
Document number
Revision date

The controller and valve are pre-wired at the factory and require a 24 VAC Class 2 supply capable of 25 VA or more and a 0 V to 10 V set point signal.

Valve calibration information is stored internally on the controller itself at the factory for the valve shipped with the UVM. CFM curve adjustments can be done in the field but is not best practice. To make any curve adjustments, you require UVM Configuration Software. The software is not included. If the UVM needs calibration, a factory trained technician needs to co-ordinate the start-up and calibration requirements.

After you wire the controller and connect the power, the actuator initially moves to both the 0% and 100% positions to perform an autostroke to enable the controller to generate a control signal based on the input set point voltage.

In its minimal configuration, the UVM requires a 24 VAC supply and a 0 V to 10 V control signal. Additionally, the UVM can use a 0 V to 10 V output signal to monitor the actual CFM the value is regulated to. The UVM can also optionally take in a digital signal from a differential pressure (DP) switch that indicates the presence or absence of air in the valve. If enabled and inactive, the flow output signal indicates 0. Optionally, the analog pressure sensor can detect the DP across the valve and indicate flow when above a specific pressure value. To use these features, enable the internal options with the UVM Configuration Software.

The UVM Configuration Tool is a special program to allow adjustments of specific parameters and settings that include the valve CFM curve. Contact Johnson Controls for more information when you use this tool or for information about the RS485 cable you use to connect the PC to the UVM.

Note: If RS485 communications are not employed, you can disconnect the RS485 cable.