Utica Boilers DXL512003240303 Hot Water Boiler 120 Mbh

Product Description

The UTICA BOILERS DXL512003240303 is a gas-fired cast iron hot water boiler rated at 120 MBH with mid-efficiency atmospheric combustion. It is designed for residential and light-commercial hydronic heating systems and is installed by licensed plumbers and HVAC technicians. The cast iron heat exchanger uses dry leg end sections for long-term durability. Electronic ignition and a motorized vent damper deliver consistent energy savings. A built-in Hydrolevel operating control module adjusts supply water temperature based on system demand, reducing fuel consumption across variable load conditions.

This boiler is suited for forced hot water heating systems that vent through an existing masonry chimney or B-vent chimney connector. The low-profile integral draft diverter reduces installation height by up to 30 percent compared to models with external draft diverter hoods, making it a practical fit for mechanical rooms with limited vertical clearance. The pull-out burner drawer and removable burner tube tray provide fast access during annual maintenance or combustion troubleshooting, reducing service time on the call.

Key Features

• Cast iron heat exchanger with dry leg end sections for reliable long-term heat transfer
• Electronic ignition with motorized vent damper for mid-efficiency operation
• Internal Hydrolevel operating control with temperature LED display and dial-type settings
• Built-in Low Water Cutoff (LWCO) protects against low water conditions
• Pull-out burner drawer and removable burner tube tray for quick field service access
• Integral low-profile draft diverter reduces installation height by up to 30 percent
• 20-year non-prorated limited warranty on the heat exchanger

Compatibility

Designed as an OEM-style replacement or new-installation boiler for residential and light-commercial chimney-vented atmospheric hot water heating systems.

Installation Notes

Installation must be performed by a licensed plumber or HVAC technician in accordance with local codes, IFGC requirements, and the manufacturer installation manual. Shut off gas supply and disconnect electrical power before servicing any components. The ASME relief valve and 3/4-inch drain valve are factory-installed; verify that relief valve discharge piping is routed per local code before startup. Do not operate the boiler without verifying proper water fill, system pressure, and venting integrity.

Technical Specifications

• Boiler Type: Hot Water Boiler
• Capacity: 120 MBH
• Efficiency: 84% Mid-Efficiency
• Heat Exchanger Material: Cast Iron with Dry Leg End Sections
• Combustion Type: Atmospheric
• Venting: Chimney Vent with Integral Low-Profile Draft Diverter
• Ignition: Electronic Intermittent Pilot, Continuous Retry 100% Shut-Off
• Gas Valve: Automatic Redundant Combination Gas Valve
• Control Voltage: 24 volts
• Operating Control: Internal Hydrolevel Outdoor Reset Control Module
• Safety Devices: Built-in LWCO, Flame Roll-Out Safety Shut-Off with Manual Reset, Blocked Vent Safety Shut-Off
• Circulator Pump: Included
• Drain Valve: 3/4 inches
• Relief Valve: ASME-rated
• Warranty: 20-Year Non-Prorated Limited

Standard Information

• Brand: UTICA BOILERS
• Manufacturer Part Number: DXL512003240303