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This furnace limit switch features a manual reset mechanism
The internal 40 VA transformer operates on a 120V primary input and steps down to a 24V secondary output for use with standard 24V thermostats and controllers
Its patented conductivity-based sensing technology distinguishes between actual low water conditions and water volatility
As an auto reset HVAC limit switch
Broad System Compatibility: Seamlessly integrates with Maxitrol M-Series modulating valves (M420
Watts 0121504 Valve Freon This furnace limit switch featuresThe Watts 0121504, officially designated as the LF174A 125 1, is a heavy duty, lead free boiler pressure relief valve engineered for high capacity protection in hot water heating and domestic supply systems. This 1 inch NPT valve is ASME Section IV rated, featuring a 3,215,000 BTU hr steam discharge capacity at its fixed 125 psi setting. Constructed with a lead free copper silicon alloy body, it ensures compliance with modern potable water regulations
US$ 49.00
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