Mini Safgard 1150 PPE Automatic Reset Electronic Probe Style Low Water Cut-Off

Introduction

The Hydrolevel Mini Safgard 1150 PPE is an automatic reset electronic probe-style low water cut-off designed to protect boilers from damage due to insufficient water levels. This device operates by sensing the water level in the boiler or an external manifold. When the water level drops below the probe, the circuit opens, de-energizing the burner circuit and preventing operation in a low water condition. This ensures the safe and reliable operation of your heating system.

Safety Information

WARNING: Installation and servicing of this device should only be performed by a qualified technician. Disconnect all power to the boiler before installation or maintenance to prevent electrical shock. Failure to follow these instructions could result in property damage, serious injury, or death.

• Ensure the boiler system is completely shut down, depressurized, and cooled before beginning work.
• Verify the electrical supply matches the device's voltage (120 VAC).
• Use appropriate personal protective equipment (PPE).
• Do not bypass safety features.

Product Overview

The Mini Safgard 1150 consists of a control unit and a probe. The control unit houses the electronic circuitry and indicator lights, while the probe is inserted into the boiler to detect water presence.

Figure 1: Hydrolevel Mini Safgard 1150 Low Water Cut-Off unit. This image shows the main control box with its indicator lights (yellow, green, red) on the top surface, the "Safgard" branding, and the brass probe connection extending from the side.

Indicator Lights:

• Yellow LED: Typically indicates power or normal operation.
• Green LED: May indicate burner enabled or water present.
• Red LED: Usually indicates a low water condition or fault.

Setup and Installation

The Mini Safgard 1150 is designed for easy installation, but proper procedure is critical for safety and functionality.

1. Preparation: Ensure the boiler is completely shut down, depressurized, and cooled. Locate the water feed to the system and close it. Drain water from the system until pressure reads zero.
2. Probe Installation: Apply appropriate thread sealant (not Teflon tape) to the threads of the new sensor probe. Carefully remove the old sensor (if applicable) and quickly thread in the new Safgard probe to minimize water spillage. Tighten securely. Ensure visible screws are horizontal if applicable.
3. Control Unit Mounting: Mount the control unit housing in a suitable location, typically near the boiler, ensuring it is protected from excessive heat and moisture.
4. Wiring: Connect the control unit wiring according to the boiler manufacturer's instructions and local electrical codes. This typically involves connecting to the burner circuit. Ensure all connections are secure.
5. System Refill: Slowly open the water feed to the boiler system, allowing it to refill. Monitor the pressure gauge.
6. Initial Test: After refilling, the Green power LED should be lit, and the Yellow "low water" LED should be off (indicating water is present). You can perform a dry run test by disconnecting the control unit from the sensor; the power and yellow light should illuminate, simulating a low water condition. Reconnect the sensor for normal operation.

Note: Air may be present in the piping after refilling. Your system's air bleeder valves should manage this as pumps circulate water.

Operating Instructions

The Mini Safgard 1150 operates automatically once installed and powered. It continuously monitors the water level within the boiler.

• Normal Operation: When the water level is above the probe, the internal circuit is completed, and the burner is allowed to operate. The indicator lights will show a normal operating status (e.g., Green LED on, Red/Yellow LEDs off).
• Low Water Condition: If the water level drops below the probe, the circuit opens. The Mini Safgard 1150 will automatically de-energize the burner circuit, preventing the boiler from firing without adequate water. The indicator lights will change to reflect the low water condition (e.g., Red or Yellow LED on).
• Automatic Reset: Once the water level is restored to a safe operating level, the device will automatically reset, allowing the burner to resume operation. No manual intervention is required for reset.

Maintenance

The Mini Safgard 1150 is designed for low maintenance. However, periodic checks are recommended to ensure continued reliable operation.

• Visual Inspection: Periodically inspect the unit and its wiring for any signs of damage, corrosion, or loose connections.
• Probe Condition: While the probe is designed for longevity, check for any signs of leakage around the probe connection during boiler maintenance. A leaking seal can indicate a need for replacement.
• Functionality Test: During annual boiler servicing, a qualified technician should test the low water cut-off functionality to ensure it properly shuts down the burner when the water level is intentionally lowered.
• Cleaning: Keep the exterior of the control unit clean and free of dust or debris.

Troubleshooting

If your Mini Safgard 1150 is not functioning as expected, consider the following common issues:

For issues not listed or if troubleshooting steps do not resolve the problem, contact a qualified HVAC technician or Hydrolevel customer support.

Specifications

• Model: 1150
• Manufacturer: Hydrolevel Company
• Voltage: 120 Volts AC
• Power Source: Corded Electric
• Sensor Technology: Contact Sensor (Probe Style)
• Reset Type: Automatic
• Mounting Type: Wall Mount (or similar, based on typical installation)
• Item Weight: Approximately 1.19 pounds (0.54 kg)
• Product Dimensions: Approximately 1 x 1 x 1 inches (2.54 x 2.54 x 2.54 cm) - Note: These dimensions seem unusually small for the product image, but are taken directly from provided data.
• Color: Grey

Warranty and Support

For information regarding product warranty, please refer to the documentation provided with your purchase or contact Hydrolevel directly. Hydrolevel products are known for their reliability and are 100% factory tested.

For technical support or service inquiries, please contact Hydrolevel customer service. Always provide your product model number (1150) and any relevant purchase details when seeking support.

You may also consider extended protection plans available from various retailers for additional coverage beyond the manufacturer's warranty.