Hydrolevel 550R Low Water Cut-Off
The Hydrolevel 550R Low Water Cut-Off is a heavy-duty 120Vac electronic LWCO engineered specifically for technical compliance in commercial hot water boiler applications. Operating as a probe-type safety control, the 550R (Part Number 45-552) provides immediate burner shutdown during critical low water conditions to prevent dry firing and catastrophic heat exchanger failure. This model features a manual reset logic that triggers after a sustained 30-second low water detection, ensuring the system remains locked out until a technician can verify the site conditions. Unlike mechanical float-style switches, the 550R utilizes solid-state circuitry with no moving parts to hang up or scale, significantly reducing service callbacks.
Designed for versatile field integration, this unit includes the EL1214-R sensing probe for remote mounting, allowing the control box to be positioned optimally for technician access. The integrated test button enables full burner circuit verification without the need to drain the system, while the LED status indicators provide instantaneous diagnostics of power and water levels. The 550R is also an excellent choice for use as a secondary low water cut-off on steam boilers, helping contractors meet ASME CSD-1 requirements and local jurisdictional codes.
Key Benefits for HVACR Contractors:- ASME CSD-1 Code Compliance: Specifically designed for commercial installations requiring manual reset safety controls.
- Remote Probe Interfacing: The included EL1214-R probe supports remote control box mounting for tight mechanical rooms or specific piping configurations.
- Nuisance Lockout Prevention: The 30-second delay and manual reset logic prevent short-cycling and ensure the reset will not trip during momentary power interruptions.
- Maintenance-Free Design: No moving parts to wear out; features a 3/4" NPT stainless steel probe for superior corrosion resistance and longevity.
- Streamlined Diagnostics: On-board Test Button and clear LED lights allow for rapid troubleshooting of the burner circuit and probe status.
Can the 550R be used on 24V burner circuits?
The control itself requires a 120Vac power supply to operate its internal logic, but the SPDT switch contacts can be used to interrupt various burner circuit voltages as part of the safety limit string.
What is the purpose of the 30-second delay?
The delay prevents nuisance shutdowns caused by temporary water surges or foaming, common in high-demand heating systems. The burner only locks out if the probe remains dry for a continuous 30 seconds.
Is the manual reset affected by power failures?
No. The 550R is engineered to maintain its status. If the control was in a normal operating state prior to a power loss, it will return to normal operation once power is restored, provided water is at the probe.
This item is not eligible for free shipping.
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.
Original: $254.77
-65%$254.77
$89.17Hydrolevel 550R Low Water Cut-Off
The Hydrolevel 550R Low Water Cut-Off is a heavy-duty 120Vac electronic LWCO engineered specifically for technical compliance in commercial hot water boiler applications. Operating as a probe-type safety control, the 550R (Part Number 45-552) provides immediate burner shutdown during critical low water conditions to prevent dry firing and catastrophic heat exchanger failure. This model features a manual reset logic that triggers after a sustained 30-second low water detection, ensuring the system remains locked out until a technician can verify the site conditions. Unlike mechanical float-style switches, the 550R utilizes solid-state circuitry with no moving parts to hang up or scale, significantly reducing service callbacks.
Designed for versatile field integration, this unit includes the EL1214-R sensing probe for remote mounting, allowing the control box to be positioned optimally for technician access. The integrated test button enables full burner circuit verification without the need to drain the system, while the LED status indicators provide instantaneous diagnostics of power and water levels. The 550R is also an excellent choice for use as a secondary low water cut-off on steam boilers, helping contractors meet ASME CSD-1 requirements and local jurisdictional codes.
Key Benefits for HVACR Contractors:- ASME CSD-1 Code Compliance: Specifically designed for commercial installations requiring manual reset safety controls.
- Remote Probe Interfacing: The included EL1214-R probe supports remote control box mounting for tight mechanical rooms or specific piping configurations.
- Nuisance Lockout Prevention: The 30-second delay and manual reset logic prevent short-cycling and ensure the reset will not trip during momentary power interruptions.
- Maintenance-Free Design: No moving parts to wear out; features a 3/4" NPT stainless steel probe for superior corrosion resistance and longevity.
- Streamlined Diagnostics: On-board Test Button and clear LED lights allow for rapid troubleshooting of the burner circuit and probe status.
Can the 550R be used on 24V burner circuits?
The control itself requires a 120Vac power supply to operate its internal logic, but the SPDT switch contacts can be used to interrupt various burner circuit voltages as part of the safety limit string.
What is the purpose of the 30-second delay?
The delay prevents nuisance shutdowns caused by temporary water surges or foaming, common in high-demand heating systems. The burner only locks out if the probe remains dry for a continuous 30 seconds.
Is the manual reset affected by power failures?
No. The 550R is engineered to maintain its status. If the control was in a normal operating state prior to a power loss, it will return to normal operation once power is restored, provided water is at the probe.
This item is not eligible for free shipping.
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.
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Description
The Hydrolevel 550R Low Water Cut-Off is a heavy-duty 120Vac electronic LWCO engineered specifically for technical compliance in commercial hot water boiler applications. Operating as a probe-type safety control, the 550R (Part Number 45-552) provides immediate burner shutdown during critical low water conditions to prevent dry firing and catastrophic heat exchanger failure. This model features a manual reset logic that triggers after a sustained 30-second low water detection, ensuring the system remains locked out until a technician can verify the site conditions. Unlike mechanical float-style switches, the 550R utilizes solid-state circuitry with no moving parts to hang up or scale, significantly reducing service callbacks.
Designed for versatile field integration, this unit includes the EL1214-R sensing probe for remote mounting, allowing the control box to be positioned optimally for technician access. The integrated test button enables full burner circuit verification without the need to drain the system, while the LED status indicators provide instantaneous diagnostics of power and water levels. The 550R is also an excellent choice for use as a secondary low water cut-off on steam boilers, helping contractors meet ASME CSD-1 requirements and local jurisdictional codes.
Key Benefits for HVACR Contractors:- ASME CSD-1 Code Compliance: Specifically designed for commercial installations requiring manual reset safety controls.
- Remote Probe Interfacing: The included EL1214-R probe supports remote control box mounting for tight mechanical rooms or specific piping configurations.
- Nuisance Lockout Prevention: The 30-second delay and manual reset logic prevent short-cycling and ensure the reset will not trip during momentary power interruptions.
- Maintenance-Free Design: No moving parts to wear out; features a 3/4" NPT stainless steel probe for superior corrosion resistance and longevity.
- Streamlined Diagnostics: On-board Test Button and clear LED lights allow for rapid troubleshooting of the burner circuit and probe status.
Can the 550R be used on 24V burner circuits?
The control itself requires a 120Vac power supply to operate its internal logic, but the SPDT switch contacts can be used to interrupt various burner circuit voltages as part of the safety limit string.
What is the purpose of the 30-second delay?
The delay prevents nuisance shutdowns caused by temporary water surges or foaming, common in high-demand heating systems. The burner only locks out if the probe remains dry for a continuous 30 seconds.
Is the manual reset affected by power failures?
No. The 550R is engineered to maintain its status. If the control was in a normal operating state prior to a power loss, it will return to normal operation once power is restored, provided water is at the probe.
This item is not eligible for free shipping.
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.
