Hydrolevel 170 Low Water Cut-Off

The Hydrolevel 170 Low Water Cut-Off is a heavy-duty electronic safety control engineered for 120Vac hot water boiler applications. Designed specifically for the heating professional, the Safgard 170 (Part Number 45-170) utilizes the EL1214 sensing probe to monitor water levels without the mechanical failures associated with traditional float-style devices. This unit features an automatic reset function that interrupts power to the burner immediately upon detecting a low water condition and restores operation once the proper level is reached, preventing dry firing and terminal boiler damage.

Built with a rugged electro-mechanical design, the Hydrolevel 45-170 provides a switching capacity of 5.8 FLA and 34.8 LRA at 120V, with a maximum pressure rating of 160 PSI. The SPDT switch contacts allow for flexible wiring, including the integration of an optional low water alarm. This probe-type LWCO is ideal for residential and light commercial systems where reliability and low maintenance are paramount. Installation is streamlined with multiple tapping options, ensuring the 120V low water cut-off maintains a precise circuit via the water's natural conductivity.

Key Benefits

• Solid-State Reliability: No moving parts to wear, stick, or hang up, ensuring consistent performance over traditional float controls.
• Automatic System Recovery: Features an automatic reset that restores burner power as soon as safe water levels are detected.
• Dual-Purpose Contacts: Includes SPDT contacts rated for heavy-duty switching and an auxiliary circuit for a low water alarm.
• High-Pressure Tolerance: Engineered to handle system pressures up to 160 PSI, suitable for a wide range of hot water boilers.
• Advanced Sensing: Uses the EL1214 probe for accurate conductivity-based detection, minimizing the risk of dry firing.

Common Questions

How do I test the Hydrolevel 170 during a maintenance call?
To confirm operation, lower the water level below the probe or carefully disconnect the probe wire while the burner is firing; the unit should immediately interrupt the burner circuit. Reconnecting the wire or restoring the water level will trigger the automatic reset.

Can this be used on a steam boiler?
The Hydrolevel 170 is specifically designed for hot water (hydronic) boilers. For steam applications, a control with a 15-second delay to prevent short cycling from surging water, such as the CycleGard series, is typically required.

Where should the EL1214 sensing probe be installed?
The probe must be installed in the boiler shell or an external manifold at or above the minimum safe water level specified by the boiler manufacturer.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.