Link Trim Actuator
- Mounts in-line using existing Damper Linkage eliminating the need for custom brackets or jackshaft re-design
- Field adjustable +/- 0.15" to +/- 0.75" trimming; mechanical stops prevent over-travel
- Up to 76 pounds Thrust Output
- Self-locking, Overload Protected, Electric Actuator with Position Feedback
- Model LTA Actuator, PCC-III Controller, SPS Firing Rate Sensor, and model ZP Oxygen Analyzer provide complete Oxygen Trim control package for a Jackshaft Burner
Overview
The Link Trim Actuator (LTA) is an easy to install actuator used for Oxygen Trim control on single point positioning (Jackshaft) burners. The LTA actually becomes an integral part of the burner linkage. A short length is cut out from the middle of the existing linkage rod, and the remaining rod ends are inserted into holes in the ends of the LTA.
- The Preferred Instruments PCC-III Oxygen Trim Controller has a programmable Oxygen setpoint as a function of burner firing rate.
- The controller receives flue gas Oxygen signals from the Model ZP Oxygen analyzer, determines the Oxygen deviation from setpoint, sends a corrective signal to the LTA actuator, which in turn trims the burner air flow.
- The existing jackshaft actuator positions the fuel control valve and air damper via the jackshaft linkage. The LTA becomes an integral part of the link (rod) that connects the fan lever arm to the jackshaft lever arm
- When the LTA is at mid-stroke, the new fan link is the same length as the original. The LTA movement “lengthens” or “shortens” the fan linkage in order to add or subtract air flow to keep the Oxygen at setpoint
Stroke (inches) - Field adjustable (+/- 0.15" to +/- 0.75")
Specifications
Power: Ambient Temp: Input: Motor: Operating Thrust: Travel: Position Feedback: Manual Operation: Linkage Connections: Stroke Time: Dimensions: Motor Housing: Weight: |
24 Vac, 3.5 W -4 to 122° F 24 Vac increase & decrease DC motor with electronic overload protection Refer to the “Operating Thrust” table Refer to the “Stroke” table Potentiometer, 1000 ohm Pushbutton clutch release ?" dia. x ¾" deep holes, 5/16" dia. or ½" MNPT with included Adapters 25 second 4 3/8 " W X 5 3/4 " H X 6 7/8 " L NEMA 2 5.31 lbs. |
Ordering Information
Specify Model LTA