Verify with the equipment manufacturer if their board supports external 24V twinning signals before integrating

Simplified Installation: Integrated power isolation removes the need for multiple external transformers

Dual-Stage Regulation: Provides high-fire and low-fire settings for improved temperature modulation and fuel economy

The valve features a manual lift stem

Hard-shutoff design improves system performance during off-cycles in modern HVACR equipment

Resideo AT140B1214 Transformer R-407C Verify with the equipment manufacturerThe Resideo AT140B1214 is a professional grade 40VA HVAC transformer engineered for multi tap versatility in light commercial and residential control circuits. As a veteran preferred 24V step down transformer, it features a multi voltage primary rated for 120V, 208V, and 240V AC inputs, ensuring compatibility with a wide range of cooling and heating equipment. This foot mounted transformer architecture includes 9 inch color coded lead wires for