The Aprilaire 4977 Relay is a high-performance 24v Coil DPDT Relay designed for seamless integration within advanced HVACR systems

it is essential to position the actuator to the fully "stem up" position to ensure proper spatial alignment of the clamp holder and the metal clamps

the S1-026-35511-118 serves as a direct-fit solution that eliminates the need for field modifications

making it compatible with standard commercial power supplies

The Weil McLain 382-200-375 Block Temperature Switch Kit is a critical safety component designed for precise thermal monitoring in GV90+ and GV series boilers

Fasco D0593 Motor 320788-702 The Aprilaire 4977 Relay isThe Fasco D0593 Motor is a high performance 1 6 HP 208 230V single phase fan and blower motor, widely utilized in commercial air handlers, fan coil units, and attic ventilators. Built in a 42 frame with a compact 5 inch diameter, this PSC (Permanent Split Capacitor) motor operates at a consistent 1550 RPM and requires a 7. 5 Mfd 370V capacitor for optimal torque and efficiency. Designed with Open Air Over (OAO) ventilation and Class B insulation, it