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preventing ground faults that lead to intermittent ignition lockouts or boiler flame failure
the D1198 is a direct HVAC part replacement for Lennox part number 25J1201 and 7121-8774
Designed specifically for R-410A refrigerant circuits
providing an exact fit for standard pilot-operated valves
Durable Construction: Built for high-pressure HVAC applications with a 52# rating
Siemens Building Technology 540-660B Sensor 318172-701 preventing ground faults that leadThe Siemens 540 660B Sensor is a staple 10K Ohm NTC thermistor designed for precision environmental monitoring in commercial HVAC applications. Engineered for seamless integration with Siemens Terminal Equipment Controllers (TEC) and LONMARK compliant systems, this Type II NTC thermistor offers a reliable sensing range from 55F to 95F. As a veteran grade wall mount room temperature sensor, it features an integrated set point slide and a flush mounted