Schneider Electric (Viconics) R820-643 Control 340793-762 For professional contractors in the

For professional contractors in the field

The 320788-702 is the blower housing assembly only

you must use the HH18HA137 OEM part to ensure the mounting depth and thermal response time match the furnace's original engineering specifications

Operating at a high voltage of 277Vac

Corrosion Resistance: Features a durable stainless steel replaceable power assembly to prevent premature valve failure

Schneider Electric (Viconics) R820-643 Control 340793-762 For professional contractors in theProfessional contractors and HVACR technicians requiring precise temperature management for resistive heating loads rely on the Schneider Electric Viconics R820 643. This microprocessor based SCR Power Control offers superior 3 phase SCR power control for HVAC electric duct heaters and industrial processes. Operating across a broad 24 600 Vac range with a robust 45 Amp capacity, it delivers precise modulation via zero cross firing, which eliminates