Resideo SPC Static Pressure Control for Bypass Zone Damper Applications

The Resideo SPC Static Pressure Control is an adjustable, single-pole double-throw (SPDT) differential pressure switch designed for forced-air zoning systems. It automatically manages duct static pressure by modulating a bypass damper, helping to maintain balanced airflow as zone dampers open and close throughout the system.

Operating over a range of 0.1 to 4.0 inches water column (W.C.) with a fixed differential, the SPC opens the bypass damper on a pressure rise and closes it on a pressure fall — providing smooth, responsive pressure regulation. Contacts are rated at 125 VA.

Key Features:

• Adjustable SPDT differential pressure switch with fixed differential
• Pressure range: 0.1 to 4.0 inches W.C.
• Controls floating-type modulating dampers in bypass zone applications
• Compatible with MARD (Modulating Automatic Round Dampers) and the ML6161 90-second actuator
• Contact rating: 125 VA
• Replaces a wide range of Resideo and competitive static pressure controls
• Includes mounting bracket, hardware, barb fitting, and tubing

The Resideo SPC (also known as SPC/U) is a proven solution for HVAC zoning bypass control, reducing system strain and improving comfort in multi-zone forced-air applications. Its broad cross-reference compatibility makes it an ideal consolidation part for HVAC service inventories.