Antunes Controls 804111702 Pressure Control

The Antunes Controls 804111702, specifically the Model HLGP-A, is a dual-function high and low gas pressure switch engineered for precision monitoring in industrial burner systems. This manual reset pressure control features a dual SPDT circuit configuration, ensuring fail-safe operation by breaking the electrical circuit if gas pressure exceeds or falls below calibrated setpoints. The high-pressure side offers an adjustable range of 5-28" W.C., while the low-pressure side monitors between 1-6" W.C. Built for rugged field environments, the unit includes a 3/8" NPT high pressure connection, a 1/8" NPT low pressure connection, and a 1/8" NPT vent. This HVAC safety switch is critical for preventing hazardous combustion conditions, providing contractors with a reliable gas pressure interlocking solution for a variety of gas-fired equipment and atmospheric burners.

• Dual Monitoring Capability: Combines high and low pressure sensing into a single, compact HLGP-A switch housing to simplify wiring and installation.
• Manual Reset Safety: Prevents automatic equipment restarts after a pressure trip, ensuring technicians can investigate and resolve the underlying issue.
• Precision NPT Ports: Dedicated 3/8" NPT and 1/8" NPT ports provide secure, leak-free mechanical connections for accurate pressure sensing.
• Field-Adjustable Setpoints: Allows for fine-tuning of WC pressure settings to meet the specific requirements of various burner manifolds.

Common Questions

How do you wire the dual SPDT circuits in the 804111702?
The dual SPDT switches are wired independently to the burner control circuit. Typically, the low-pressure side is wired normally closed (NC) to break the circuit on a pressure drop, while the high-pressure side is wired NC to break on a pressure rise.

What is the purpose of the 1/8" NPT vent on this model?
The vent connection allows for the safe piping of gas to an external atmosphere or a combustion chamber, preventing gas buildup in the event of a diaphragm rupture.

Can the manual reset be bypassed for automatic operation?
No, the manual reset gas switch is designed as a safety device. Bypassing this feature would compromise the integrity of the safety interlock system and violate most mechanical codes.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.