
Hydrolevel 1100H5 Low Water Cut-Off
The Hydrolevel 1100H5 is a 24VAC low water cut-off (LWCO) engineered specifically for high-efficiency residential boilers. This compact probe-type control utilizes Hydrolevel CycleGard technology to periodically shut down the burner, allowing the water level to stabilize for accurate sensing without nuisance tripping. It features an automatic reset function and an integrated burner circuit test button for rapid diagnostic verification during maintenance calls. This specific model includes the 45-1105 wire harness, ensuring direct compatibility with Weil-McLain Ultra as well as Lochinvar Knight and Solution series boilers. The unit provides clear visual feedback via dedicated Power and Low Water LED indicators, simplifying troubleshooting in the field. Designed for secondary LWCO applications or primary protection where specified, the 1100H5 ensures the burner circuit is interrupted if a low water condition is detected, protecting the heat exchanger from thermal stress and dry-firing.
- OEM Compatibility: Includes the 45-1105 harness for seamless integration with Weil-McLain and Lochinvar control boards.
- Diagnostic Testing: The manual test button allows technicians to verify burner circuit interruption without draining the system.
- CycleGard Technology: Prevents false shutdowns by clearing the probe of air pockets and allowing water levels to settle.
- Compact Profile: Ideal for tight boiler jackets and internal mounting where space is a premium.
- Simplified Wiring: 24V operation draws minimal current, easily powered by the boiler's internal transformer.
Common HVACR Contractor Questions:
How do I test the Hydrolevel 1100H5 without draining the boiler?
Use the burner circuit test button on the front of the 1100H5 housing. Depressing this button simulates a low water condition, which should immediately drop the signal to the burner's gas valve or control module to verify relay functionality.
Can the 1100H5 be used in steam boiler applications?
The 1100H5 is specifically designed for hot water boilers. Steam applications typically require the Safgard 400 series or 1100 models configured for steam, as the cycling requirements and probe positioning differ significantly.
What does it mean if the Low Water light is flickering?
Flickering often indicates probe scaling or heavy sediment buildup. Pull the probe and clean the sensing element with fine steel wool to ensure a proper conductive path to ground through the system water.
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.
Hydrolevel 1100H5 Low Water Cut-Off
The Hydrolevel 1100H5 is a 24VAC low water cut-off (LWCO) engineered specifically for high-efficiency residential boilers. This compact probe-type control utilizes Hydrolevel CycleGard technology to periodically shut down the burner, allowing the water level to stabilize for accurate sensing without nuisance tripping. It features an automatic reset function and an integrated burner circuit test button for rapid diagnostic verification during maintenance calls. This specific model includes the 45-1105 wire harness, ensuring direct compatibility with Weil-McLain Ultra as well as Lochinvar Knight and Solution series boilers. The unit provides clear visual feedback via dedicated Power and Low Water LED indicators, simplifying troubleshooting in the field. Designed for secondary LWCO applications or primary protection where specified, the 1100H5 ensures the burner circuit is interrupted if a low water condition is detected, protecting the heat exchanger from thermal stress and dry-firing.
- OEM Compatibility: Includes the 45-1105 harness for seamless integration with Weil-McLain and Lochinvar control boards.
- Diagnostic Testing: The manual test button allows technicians to verify burner circuit interruption without draining the system.
- CycleGard Technology: Prevents false shutdowns by clearing the probe of air pockets and allowing water levels to settle.
- Compact Profile: Ideal for tight boiler jackets and internal mounting where space is a premium.
- Simplified Wiring: 24V operation draws minimal current, easily powered by the boiler's internal transformer.
Common HVACR Contractor Questions:
How do I test the Hydrolevel 1100H5 without draining the boiler?
Use the burner circuit test button on the front of the 1100H5 housing. Depressing this button simulates a low water condition, which should immediately drop the signal to the burner's gas valve or control module to verify relay functionality.
Can the 1100H5 be used in steam boiler applications?
The 1100H5 is specifically designed for hot water boilers. Steam applications typically require the Safgard 400 series or 1100 models configured for steam, as the cycling requirements and probe positioning differ significantly.
What does it mean if the Low Water light is flickering?
Flickering often indicates probe scaling or heavy sediment buildup. Pull the probe and clean the sensing element with fine steel wool to ensure a proper conductive path to ground through the system water.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Hydrolevel 1100H5 is a 24VAC low water cut-off (LWCO) engineered specifically for high-efficiency residential boilers. This compact probe-type control utilizes Hydrolevel CycleGard technology to periodically shut down the burner, allowing the water level to stabilize for accurate sensing without nuisance tripping. It features an automatic reset function and an integrated burner circuit test button for rapid diagnostic verification during maintenance calls. This specific model includes the 45-1105 wire harness, ensuring direct compatibility with Weil-McLain Ultra as well as Lochinvar Knight and Solution series boilers. The unit provides clear visual feedback via dedicated Power and Low Water LED indicators, simplifying troubleshooting in the field. Designed for secondary LWCO applications or primary protection where specified, the 1100H5 ensures the burner circuit is interrupted if a low water condition is detected, protecting the heat exchanger from thermal stress and dry-firing.
- OEM Compatibility: Includes the 45-1105 harness for seamless integration with Weil-McLain and Lochinvar control boards.
- Diagnostic Testing: The manual test button allows technicians to verify burner circuit interruption without draining the system.
- CycleGard Technology: Prevents false shutdowns by clearing the probe of air pockets and allowing water levels to settle.
- Compact Profile: Ideal for tight boiler jackets and internal mounting where space is a premium.
- Simplified Wiring: 24V operation draws minimal current, easily powered by the boiler's internal transformer.
Common HVACR Contractor Questions:
How do I test the Hydrolevel 1100H5 without draining the boiler?
Use the burner circuit test button on the front of the 1100H5 housing. Depressing this button simulates a low water condition, which should immediately drop the signal to the burner's gas valve or control module to verify relay functionality.
Can the 1100H5 be used in steam boiler applications?
The 1100H5 is specifically designed for hot water boilers. Steam applications typically require the Safgard 400 series or 1100 models configured for steam, as the cycling requirements and probe positioning differ significantly.
What does it mean if the Low Water light is flickering?
Flickering often indicates probe scaling or heavy sediment buildup. Pull the probe and clean the sensing element with fine steel wool to ensure a proper conductive path to ground through the system water.
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.











