the SLD series is specifically designed for suction line applications

Operating a unit without a functional high limit safety switch can lead to catastrophic component failure or fire hazards

Direct Cross-Reference: Fully compatible and identical to Lennox 34M7601

while a 3/4-inch stroke configuration yields a 5

When utilizing Terminal 1 and 2

Hydrolevel 24SV Low Water Cut-Off 30067439-890 the SLD series is specificallyThe Hydrolevel 24SV Low Water Cut Off is a heavy duty electronic safety control designed for 24Vac hot water boiler applications. Engineered with a compact NEMA 1 enclosure, this unit is built for tight residential and light commercial boiler rooms where space is at a premium. The Hydrolevel 45 245 utilizes a specialized EL1214 SV sensing probe, which features a shorter length (2 1 16" insertion) specifically designed to fit into standard 3 4" NPT