Macurco GBC-120-2 Gas Boiler Controller, 120V, 2-Relay

Protect your facility and staff with the Macurco GBC-120-2 Gas Boiler Controller — a dedicated safety interface that reliably shuts down boilers when gas is detected. This Macurco gas boiler controller pairs with Macurco gas detectors to convert detection events into controlled shutdowns and alarm outputs, providing clear, actionable responses for building safety and risk mitigation.

Designed for commercial boiler rooms, the GBC-120-2 operates on 120VAC and includes two onboard relays, with optional expansion to individually control up to eight boilers. An integrated 24VDC driver powers horn/strobe devices and an audible buzzer for local notification, while the NEMA 4X (IP66) polycarbonate enclosure ensures durability in demanding environments. It supports up to four detectors, simplifying monitoring and integration into your security, surveillance and building management strategies.

Ideal for mechanical contractors, facilities managers and safety integrators, the GBC-120-2 delivers scalable, code-conscious shutdown capability and clear alarm signaling. Add this controller to your gas detection network to improve safety, compliance and operational uptime—contact us to specify the right expansion modules for your site.

• Automatic, fail-safe boiler shutdown on gas detection to protect personnel and reduce asset damage
• Scalable relay control: 2 onboard relays with expansion to individually shut down up to 8 boilers for flexible site integration
• 120VAC operation for easy wiring into commercial electrical systems and plant control panels
• Integrated 24VDC horn/strobe driver and audible buzzer for immediate local notification and compliance-ready alarm output
• Rugged NEMA 4X (IP66) polycarbonate enclosure for reliable operation in harsh boiler rooms and mechanical spaces
• Supports up to 4 Macurco detectors for centralized monitoring and seamless integration with security and building management systems