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effectively supporting additional low-voltage accessories and smart controls
cutting power to the burner circuit to prevent heat exchanger damage or flame rollout in the event of a blower failure or restricted airflow
eliminating the need for extra capillary tubes that eventually leak
this factory-authorized part ensures the structural integrity and operational safety of the venting system
and heat pump systems with one SKU
Ranco A22-391 Control 30067439-890 effectively supporting additional low-voltage accessoriesThe Ranco A22 391 Constant Differential Control is a specialized temperature control switch engineered for high demand commercial refrigeration and freezer applications. This SPDT (Single Pole Double Throw) control is designed without an "off" position, ensuring continuous monitoring and regulation for HVACR refrigeration temperature control. With a constant differential of 8. 0F, it maintains tight thermal tolerances across its operating range. The
