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this specific part number is engineered for vertical furnace drain pan applications
Can this relay be used on 120V systems
this manual reset thermal switch ensures the combustion chamber remains within safe operating parameters by interrupting the millivolt signal to the gas control valve if internal temperatures exceed 240°F
this unit utilizes a mid-point ground configuration to ensure balanced electrical stress across the secondary windings
it offers maximum installation flexibility for professional contractors working on high-performance HVACR systems
Johnson Controls A28AA-29 Temperature Control R-410A this specific part number isThe Johnson Controls A28AA 29 is a heavy duty two stage temperature control designed for precise cycling of multiple HVACR components. Featuring 2 SPDT switch action, this mechanical thermostat allows for sequenced control of heating, cooling, or ventilation equipment across a broad 30 to 100 degree setpoint range. For technicians replacing legacy components, the A28AA 29 serves as the direct Johnson Controls A28AA 81 replacement, maintaining exact
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