Antunes Controls 804112109 Pressure Switch

The Antunes Controls 804112109 (Model RHLGP-A) is a field-adjustable high-low gas pressure switch designed for critical monitoring in industrial and commercial combustion systems. Engineered with a dual SPDT switch configuration, this unit provides independent high and low pressure setpoints between 10" and 50" WC, helping you maintain strict compliance with safety interlock requirements. Built with a rugged die-cast aluminum housing, it withstands the demanding environments of boiler rooms and commercial kitchens. The auto reset (recycle type) functionality ensures the electrical control circuit automatically restores power once gas pressure returns to the calibrated operating range, minimizing unnecessary downtime. For streamlined installation, the RHLGP-A features a 3/8" NPT high pressure connection, a 1/8" NPT low pressure inlet, and a 1/8" NPT vent, allowing for centralized gas pressure monitoring without the need for additional leveling or separate interlock components.

• Dual-Function Monitoring: Combines high and low gas pressure protection into a single housing, saving significant wiring and installation space.
• Wide Adjustable Range: Provides precise 10-50" WC high and low setpoints, making it compatible with various high-capacity gas burner systems.
• Flexible Installation: Mounts horizontally and does not require accurate leveling, simplifying setup on existing piping.
• Industrial Durability: The die-cast aluminum construction protects internal components against ambient temperatures ranging from -40°F to 140°F.
• Code Compliance: Meets rigorous industry standards as a UL, FM, and CSA listed safety device for combustion safeguard systems.

What is the maximum surge pressure for the 804112109?
This switch is rated for a maximum surge pressure of 10 PSI. Exceeding this limit can damage the internal diaphragm and affect calibration accuracy.

Does the RHLGP-A require manual intervention after a pressure trip?
No, this specific model features an automatic reset (recycle type). It will automatically close the circuit once the gas pressure resolves back into the safe operating window defined by your setpoints.

How do I adjust the setpoints?
Remove the electrical junction box cover to access the internal range scale indicators. You can adjust the high and low indicators independently to your required WC settings before replacing the cover.

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.