Single-Zone Switching Relay, 120VAC

Argo AR822II Single Zone Relay – 120VAC Control for Hydronic Heating Applications

The Argo AR822II Single Zone Relay is a 120VAC-powered control module designed for use in single-zone hydronic heating systems. This DPDT relay is engineered to control circulators or other zone devices with consistent and reliable operation. Suitable for both retrofit and new construction, it meets performance expectations on professional job sites.

The unit features plug-in style ice cube relays for quick field replacement, auto-reset fuse protection, and a built-in transformer. With its compact, contractor-friendly enclosure and straightforward wiring terminal layout, it supports fast installation and service.

Key Features

• Voltage: 120 VAC input
• Relay Contact Rating: 10 A load capacity
• Control Transformer: Integrated 15 VA transformer (with 40 VA rating)
• Relay Configuration: DPDT (Double-Pole, Double-Throw)
• Electronic Protection: Auto-reset electronic fuse to prevent system interruptions
• Relay Type: Plug-in cube relay for field serviceability
• Frequency: 60 Hz operation

Applications

The AR822II is intended for use in single-zone hydronic heating systems where isolated control of a circulator or similar load is required. It integrates with thermostats, boiler controls, or zone valve logic to ensure precise control and system protection.

Installation and Service Notes

Installation should be performed by licensed HVAC or electrical professionals. The unit is designed for surface mounting and includes clearly marked terminal connections. Ensure compliance with local code and system design parameters when integrating into existing or new systems.

Professional Use Advantages

The AR822II is built with field efficiency in mind. Modular components reduce service time, and the included transformer supports direct thermostat power. Its compact housing makes it suitable for tight spaces or retrofit panels, and its durable build is appropriate for long-term use in demanding environments.